archive the v1.0 - old db structure

2025-12-08 19:25:22 +00:00 · 2022-06-16 16:25:31 +08:00 · 2022-06-16 16:25:31 +08:00 · 1e2544cc57
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--- a/CHANGES.md
+++ b/CHANGES.md
@ -1,61 +0,0 @@
-### 1.8
-1. 数据升级至2018/12/31的版本，国外的也增加了大量的城市数据。
-2. Java的binding的Searcher类增加了如下的接口和实现：
-```java
-DbSearcher(DbConfig dbConfig, string dbBinStr);
-```
-
-maven坐标：
-```xml
-<dependency>
-    <groupId>org.lionsoul</groupId>
-    <artifactId>ip2region</artifactId>
-    <version>1.7.2</version>
-</dependency>
-```
-
-3. Javascript的pacakge上传到了npm。
-4. 增加纯lua实现的lua binding (lua 5.2版本依赖bit模块，对5.3的支持将使用lua自带的bit操作)。
-5. 增加C实现的lua_c binding (和c的性能等同，建议使用)。
-6. 优化部分binding的demo运行和使用文档。
-7. 修复python binding的benchmark的部分错误。
-
-
-### 1.2.4
-1, 花了近两周的时间重写了数据的升级算法，再次提高准确率，升级过程如下（此处应该有掌声）：
-
-```shell
-1. ip预分段，利于分布式同步升级
-2. 分段同步升级，目前使用四个机器同时升级
-3，自动验证数据查缺补全
-4，数据合并
-5，数据格式标准化，目前2个工作：
-    1)，ipip.net的数据和淘宝数据保持区域名称统一，ipip.net的数据不带“省”和“市”关键字。
-    2)，香港澳门台湾等国家信息修复（淘宝原始数据有问题），reported at http://git.oschina.net/lionsoul/ip2region/issues/21
-6，重复ip段的合并得到data目录下的ip.merge.txt
-7，生产data目录下的ip2region.db二进制数据库文件
-```
-
-2，修复原始数据关于“香港，台湾，澳门”国家信息错误的bug，reported at http://git.oschina.net/lionsoul/ip2region/issues/21
-3，将数据升级至：2017/03/15同步版本
-4，增加c_mmap查询客户端，C客户端查询文件读取使用内存映射加速，感谢[Leo Ma](http://git.oschina.net/begeekmyfriend)的贡献
-
-备注：部分阿里云数据有问题，缺失的部分使用免费开放的ipip.net的数据代替了。
-
-### 1.2.3
-1. 优化升级算法，进行更深度的分裂，可以使准确率再度提高（同时数据的更新也花费了2天多的时间）。
-2. 数据升级至2016/12/14版本的数据（包括原始数据和binary数据库的数据）。
-
-### 1.2.2
-
-1. ip数据文件更新至2016/11/02版本
-2. 增加ip2region.db数据库文件的java生成工具，请参考README获取使用方式
-3. 新增golang查询客户端的实现，感谢 [@mohong122](https://github.com/mohong122) 的关注和贡献
-
-### 1.2
-
-1. 新增分列式升级算法，大大的增加了数据的准确率，基本避免之前各大网友反馈的些许ip定位错误！
-2. 数据升级是2016/06/30版！
-3. 优化数据文件生成算法，ip2region.db文件由原来的3.5M降为1.5M，42亿个IP地址，皆大欢喜啊！
-4. C/PHP/JAVA客户端增加纯内存搜索模式（python, php扩展，nodejs会在后续版本加上！）
-说明：因为数据文件只有1.5M，对于PHP,java这类IO优化类语言提升速度不大，C有一个数量级的提升！
--- a/Cargo.toml
+++ b/Cargo.toml
@ -1,2 +0,0 @@
-[workspace]
-members = ["binding/rust", "binding/rust/example"]
--- a/README.md
+++ b/README.md
@ -1,175 +0,0 @@
-# Ip2region是什么？ 
-
-阅读其他语言介绍：[简体中文](README.md) | [English](README_en.md)
-
-ip2region - 准确率99.9%的离线IP地址定位库，0.0x毫秒级查询，ip2region.db数据库只有数MB，提供了java,php,c,python,nodejs,golang,c#等查询绑定和Binary,B树,内存三种查询算法。
-
-
-
-# Ip2region特性
-
-### 99.9%准确率
-
-数据聚合了一些知名ip到地名查询提供商的数据，这些是他们官方的的准确率，经测试着实比经典的纯真IP定位准确一些。<br />
-ip2region的数据聚合自以下服务商的开放API或者数据(升级程序每秒请求次数2到4次): <br />
-01, &gt;80%, 淘宝IP地址库, [http://ip.taobao.com/](http://ip.taobao.com/) <br />
-02, ≈10%, GeoIP, [https://geoip.com/](https://geoip.com/) <br />
-03, ≈2%, 纯真IP库, [http://www.cz88.net/](http://www.cz88.net/) <br />
-<b>备注：</b>如果上述开放API或者数据都不给开放数据时ip2region将停止数据的更新服务。
-
-
-### 标准化的数据格式
-
-每条ip数据段都固定了格式：
-```
-_城市Id|国家|区域|省份|城市|ISP_
-```
-
-只有中国的数据精确到了城市，其他国家有部分数据只能定位到国家，后前的选项全部是0，已经包含了全部你能查到的大大小小的国家（请忽略前面的城市Id，个人项目需求）。
-
-
-### 体积小
-
-包含了全部的IP，生成的数据库文件ip2region.db只有几MB，最小的版本只有1.5MB，随着数据的详细度增加数据库的大小也慢慢增大，目前还没超过8MB。
-
-
-### 查询速度快
-
-全部的查询客户端单次查询都在0.x毫秒级别，内置了三种查询算法
-
-1. memory算法：整个数据库全部载入内存，单次查询都在0.1x毫秒内，C语言的客户端单次查询在0.00x毫秒级别。
-2. binary算法：基于二分查找，基于ip2region.db文件，不需要载入内存，单次查询在0.x毫秒级别。
-3. b-tree算法：基于btree算法，基于ip2region.db文件，不需要载入内存，单词查询在0.x毫秒级别，比binary算法更快。
-
-任何客户端b-tree都比binary算法快，当然memory算法固然是最快的！
-
-
-### 多查询客户端的支持
-
-已经集成的客户端有：java、C#、php、c、python、nodejs、php扩展(php5和php7)、golang、rust、lua、lua_c, nginx。
-
-binding | 描述 | 开发状态 | binary查询耗时 | b-tree查询耗时 | memory查询耗时
-:-: | :-: | :-: | :-: | :-: | :-:
-[c](binding/c) | ANSC c binding | 已完成 | 0.0x毫秒 | 0.0x毫秒 | 0.00x毫秒
-[c#](binding/c#) | c# binding | 已完成 | 0.x毫秒 | 0.x毫秒 | 0.1x毫秒
-[golang](binding/golang) | golang binding | 已完成 | 0.x毫秒 | 0.x毫秒 | 0.1x毫秒
-[java](binding/java) | java binding | 已完成 | 0.x毫秒 | 0.x毫秒 | 0.1x毫秒
-[lua](binding/lua) | lua实现的binding | 已完成 | 0.x毫秒 | 0.x毫秒 | 0.x毫秒
-[lua_c](binding/lua_c) | lua的c扩展      | 已完成 | 0.0x毫秒 | 0.0x毫秒 | 0.00x毫秒
-[nginx](binding/nginx) | nginx的c扩展 | 已完成 | 0.0x毫秒 | 0.0x毫秒 | 0.00x毫秒
-[nodejs](binding/nodejs) | nodejs | 已完成 | 0.x毫秒 | 0.x毫秒 | 0.1x毫秒
-[php](binding/php) | php实现的binding | 已完成 | 0.x毫秒 | 0.1x毫秒 | 0.1x毫秒
-[php5_ext](binding/php5_ext) | php5的c扩展 | 已完成 | 0.0x毫秒 | 0.0x毫秒 | 0.00x毫秒
-[php7_ext](binding/php7_ext) | php7的c扩展 | 已完成 | 0.0毫秒 | 0.0x毫秒 | 0.00x毫秒
-[python](binding/python) | python bindng | 已完成 | 0.x毫秒 | 0.x毫秒 | 0.x毫秒
-[rust](binding/rust) | rust binding | 已完成 | 0.x毫秒 | 0.x毫秒 | 0.x毫秒
-
-
-
-
-# ip2region快速测试
-
-请参考每个binding下的README说明去运行cli测试程序，例如C语言的demo运行如下：
-```shell
-cd binding/c/
-gcc -g -O2 testSearcher.c ip2region.c
-./a.out ../../data/ip2region.db
-```
-
-会看到如下cli界面：
-```shell
-initializing  B-tree ... 
-+----------------------------------+
-| ip2region test script            |
-| Author: chenxin619315@gmail.com  |
-| Type 'quit' to exit program      |
-+----------------------------------+
-p2region>> 101.105.35.57
-2163|中国|华南|广东省|深圳市|鹏博士 in 0.02295 millseconds
-```
-
-输入IP地址开始测试，第一次会稍微有点慢，在运行命令后面接入binary,memory来尝试其他算法，建议使用b-tree算法，速度和并发需求的可以使用memory算法，具体集成请参考不同binding下的测试源码。
-
-
-
-
-# ip2region安装
-
-具体请参考每个binding下的README文档和测试demo，以下是一些可用的快捷安装方式：
-
-### maven仓库地址
-```xml
-<dependency>
-    <groupId>org.lionsoul</groupId>
-    <artifactId>ip2region</artifactId>
-    <version>1.7.2</version>
-</dependency>
-```
-
-### nodejs
-```
-npm install node-ip2region --save
-```
-
-### nuget安装
-```shell
-Install-Package IP2Region
-```
-
-### php composer
-```shell
-# 插件来自：https://github.com/zoujingli/ip2region
-composer require zoujingli/ip2region
-```
-
-
-
-# ip2region 并发使用
-
-1. 全部binding的各个search接口都<b>不是</b>线程安全的实现，不同线程可以通过创建不同的查询对象来使用，并发量很大的情况下，binary和b-tree算法可能会打开文件数过多的错误，请修改内核的最大允许打开文件数(fs.file-max=一个更高的值)，或者使用持久化的memory算法。
-
-2. memorySearch接口，在发布对象前进行一次预查询(本质上是把ip2region.db文件加载到内存)，可以安全用于多线程环境。
-
-
-
-
-# ip2region.db的生成
-
-从1.8版本开始，ip2region开源了ip2region.db生成程序的java实现，提供了ant编译支持，编译后会得到以下提到的dbMaker-{version}.jar，对于需要研究生成程序的或者更改自定义生成配置的请参考${ip2region_root}/maker/java内的java源码。
-
-
-从ip2region 1.2.2版本开始里面提交了一个dbMaker-{version}.jar的可以执行jar文件，用它来完成这个工作：
-
-1. 确保你安装好了java环境（不玩Java的童鞋就自己谷歌找找拉，临时用一用，几分钟的事情）
-2. cd到${ip2region_root}/maker/java，然后运行如下命令：
-
-```shell
-java -jar dbMaker-{version}.jar -src 文本数据文件 -region 地域csv文件 [-dst 生成的ip2region.db文件的目录]
-
-# 文本数据文件：db文件的原始文本数据文件路径，自带的ip2region.db文件就是/data/ip.merge.txt生成而来的，你可以换成自己的或者更改/data/ip.merge.txt重新生成
-# 地域csv文件：该文件目的是方便配置ip2region进行数据关系的存储，得到的数据包含一个city_id，这个直接使用/data/origin/global_region.csv文件即可
-# ip2region.db文件的目录：是可选参数，没有指定的话会在当前目录生成一份./data/ip2region.db文件
-```
-
-3. 获取生成的ip2region.db文件覆盖原来的ip2region.db文件即可
-4. 默认的ip2region.db文件生成命令:
-
-```shell
-cd ${ip2region_root}/java/
-java -jar dbMaker-1.2.2.jar -src ./data/ip.merge.txt -region ./data/global_region.csv
-
-# 会看到一大片的输出
-```
-
-
-
-
-# 相关备注
-
-### 声明 
-ip2region重点在于<b>研究IP数据的存储设计和各种语言的查询实现</b>，并没有原始IP数据的支撑，数据来源请参考上面的描述，升级数据需要很多IP的支撑并且会对原始平台造成一定量的请求压力，本项目不保证及时的数据更新，没有也不会有商用版本，你可以使用自定义的数据导入ip2region进行自定义查询的实现。
-
-### 技术交流
-1. 数据库文件的结构和原理请阅读 @冬芽 的blog：[“ip2region数据库文件的结构和原理”](https://github.com/dongyado/dongyado.github.io/blob/master/_posts/2016-08-18-structure-of-ip2region-database-file.md)，[ip2region数据结构设计和实现视频分享](https://www.bilibili.com/video/BV1wv4y1N7SD)
-2. ip2region交流分享，微信：lionsoul2014(请备注ip2region)，QQ：1187582057(很少关注)
-3. 基于检测算法的数据更新方式视频分享：[数据更新实现视频分享part1](https://www.bilibili.com/video/BV1934y1E7Q5/)，[数据更新实现视频分享part2](https://www.bilibili.com/video/BV1pF411j7Aw/)
--- a/README_en.md
+++ b/README_en.md
@ -1,197 +0,0 @@
-
-# What is Ip2region?
-
-Read this in other languages: [简体中文](README.md) | [English](README_en.md)
-
-ip2region - offline IP address location library with 99.9% accuracy, 0.0x millisecond queries, ip2region.db database is only a few MB, provides query bindings for 
-```
-java|php|c|python|nodejs|golang|c#
-```
-and three query algorithms for 
-```
-Binary|B-tree|memory
-```
-# Ip2region features
-
-### 99.9% accuracy rate
-
-The data is aggregated from some well-known ip to place name lookup providers, these are their official accuracy rates, tested to be actually a bit more accurate than the classic pure IP location. 
-
-The data of ip2region is aggregated from the open API or data of the following service providers (2 to 4 requests per second for the upgrade program): 
-
-
-01. &gt;80% - [Taobao IP address database](http://ip.taobao.com/) <br />
-02. ≈10% - [GeoIP](https://geoip.com/) <br />
-03. ≈2% - [Pure IP Library](http://www.cz88.net/) <br />
-
-<b>Remarks:</b> If none of the above open APIs or data give open data ip2region will stop the update service for the data.
-
-
-### Standardized data format
-
-Each ip data segment has a fixed format of.
-```
-_cityId|country|region|province|city|ISP_
-```
-
-Only the data for China is accurate to the city, some of the data for other countries can only be located to the country, and all the options before the latter are 0, which already contains all the big and small countries you can check (please ignore the city Id in front, personal project requirements).
-
-
-### Small size
-
-Contains all the IPs, the generated database file ip2region.db is only a few MB, the smallest version is only 1.5 MB, with the increase in the level of detail of the data the size of the database is slowly increasing, currently not more than 8 MB.
-
-
-### Fast query speed
-
-All of the query client single query are in the 0.x millisecond level, built-in three query algorithms
-
-1. memory algorithm: the entire database is loaded into memory, single query are within 0.1x milliseconds, C language client single query in 0.00x milliseconds level.
-2. binary algorithm: based on dichotomous lookup, based on ip2region.db file, no need to load memory, single query in 0.x milliseconds level.
-3. b-tree algorithm: based on btree algorithm, based on ip2region.db file, no need to load memory, word query at 0.x milliseconds level, faster than binary algorithm.
-
-Any client b-tree is faster than binary algorithm, of course memory algorithm is certainly the fastest!
-
-
-### Multi-query client support
-
-Clients already integrated are:
-```
-java, C#, php, c, python, nodejs, php extensions (php5 and php7), golang, rust, lua, lua_c, nginx.
-```
-binding | description | development status | binary query time consuming | b-tree query time consuming | memory query time consuming
-:-: | :-: | :-: | :-: | :-: | :-:
-[c](binding/c) | ANSC c binding | completed | 0.0x ms | 0.0x ms | 0.00x ms
-[c#](binding/c#) | c# binding | completed | 0.x ms | 0.x ms | 0.1x ms
-[golang](binding/golang) | golang binding | done | 0.x ms | 0.x ms | 0.1x ms
-[java](binding/java) | java binding | completed | 0.x ms | 0.x ms | 0.1x ms
-[lua](binding/lua) | lua implementation of binding | done | 0.x ms | 0.x ms | 0.x ms
-[lua_c](binding/lua_c) | lua's c extension | done | 0.0x ms | 0.0x ms | 0.00x ms
-[nginx](binding/nginx) | c extensions for nginx | done | 0.0x ms | 0.0x ms | 0.00x ms
-[nodejs](binding/nodejs) | nodejs | completed | 0.x ms | 0.x ms | 0.1x ms
-[php](binding/php) | php implementation of binding | done | 0.x ms | 0.1x ms | 0.1x ms
-[php5_ext](binding/php5_ext) | c extensions for php5 | done | 0.0x ms | 0.0x ms | 0.00x ms
-[php7_ext](binding/php7_ext) | c extensions for php7 | done | 0.0x ms | 0.0x ms | 0.00x ms
-[python](binding/python) | python bindng | done | 0.x ms | 0.x ms | 0.x ms
-[rust](binding/rust) | rust binding | done | 0.x ms | 0.x ms | 0.x ms
-
-
-
-
-# ip2region quick test
-
-Please refer to the README instructions under each binding to run the cli test program, for example the C demo runs as follows.
-```shell
-cd binding/c/
-gcc -g -O2 testSearcher.c ip2region.c
-. /a.out ... /... /data/ip2region.db
-```
-
-You will see the following cli interface.
-```
-initializing B-tree ...
-+----------------------------------+
-| ip2region test script |
-| Author: chenxin619315@gmail.com |
-| Type 'quit' to exit program |
-+----------------------------------+
-p2region>> 101.105.35.57
-2163|China|South|Guangdong|Shenzhen|Dr. Peng in 0.02295 millseconds
-```
-
-Enter the IP address to start the test, the first time will be slightly slow, after the run command access binary,memory to try other algorithms, it is recommended to use the b-tree algorithm, speed and concurrency requirements can use the memory algorithm, please refer to the test source code under different binding for specific integration.
-
-
-
-
-# ip2region installation
-
-Refer to the README documentation and test demos under each binding for details, and here are some available shortcut installations.
-
-### maven repository address
-```xml
-<dependency>
-    <groupId>org.lionsoul</groupId>
-    <artifactId>ip2region</artifactId>
-    <version>1.7.2</version>
-</dependency>
-```
-
-### nodejs
-```
-npm install node-ip2region --save
-```
-
-### nuget install
-```shell
-NuGet install IP2Region
-```
-
-### php composer
-```shell
-# Plugin from: https://github.com/zoujingli/ip2region
-composer require zoujingli/ip2region
-```
-
-
-
-# ip2region Concurrent use
-
-1. each search interface of all binding is <b>not</b> a thread-safe implementation, different threads can use it by creating different query objects. with high concurrency, the binary and b-tree algorithms may have too many open files error, please modify the kernel's maximum number of open files allowed (fs.file-max=a higher value), or use a persistent memory algorithm.
-
-2. memorySearch interface, which performs a pre-query before publishing the object (essentially loading the ip2region.db file into memory), can be safely used in a multi-threaded environment.
-
-
-
-
-# ip2region.db generation
-
-Starting from version 1.8, ip2region has open sourced the java implementation of the ip2region.db generator, providing ant compilation support, which will result in the dbMaker-{version}.jar mentioned below, for those who need to study the generator or change the custom generation configuration please refer to ${ip2region_ root}/maker/java for the java source code.
-
-
-Starting with ip2region version 1.2.2 there is an executable jar file dbMaker-{version}.jar committed inside, which is used to do this.
-
-1. make sure you have the java environment installed (kids who don't play with Java will Google themselves to find a pull, temporary use, a matter of minutes)
-2. cd to `${ip2region_root}/maker/java` and run the following command.
-```shell
-java -jar dbMaker-{version}.jar -src text data file -region geographic csv file [-dst directory of the generated ip2region.db file]
-
-# text data file: the original text data file path of the db file, the self-contained ip2region.db file is generated from /data/ip.merge.txt, you can replace it with your own or change /data/ip.merge.txt to regenerate it
-# geographic csv file: the purpose of this file is to facilitate the configuration of ip2region for data relationship storage, the data obtained contains a city_id, this can be directly used /data/origin/global_region.csv file
-# ip2region.db file directory: is optional, if not specified, a copy will be generated in the current directory. /data/ip2region.db file
-```
-
-3. get the generated ip2region.db file to overwrite the original ip2region.db file
-4. The default ip2region.db file generation command:
-
-```shell
-cd ${ip2region_root}/java/
-java -jar dbMaker-1.2.2.jar -src . /data/ip.merge.txt -region . /data/global_region.csv
-
-# You'll see a big chunk of output
-```
-
-
-
-
-# Related remarks
-
-### Declaration
-ip2region focuses on <b>
-researching IP data storage design and query implementation in various languages</b>, there is no original IP data support, please refer to the description above for data sources, upgrading data requires a lot of IP support and will cause a certain amount of request pressure on the original platform, this project does not guarantee timely data updates, there is no and will not be a commercial version, you can use You can use the custom data import ip2region for custom query implementation.
-
-### Technical Communication
-1. the structure and principle of the database file, please read @冬芽's blog:
-
- [ip2region Database File Structure and Principle](https://github.com/dongyado/dongyado.github.io/blob/master/_posts/2016-08-18-structure-of-ip2region-database-file.md) 
- [ip2region Data Structure Design and Implementation Video share](https://www.bilibili.com/video/BV1wv4y1N7SD)
-
-2. ip2region exchange and sharing
-
- WeChat: lionsoul2014 (please note ip2region)
- QQ: 1187582057 (little attention)
-
-3. based on the detection algorithm of the data update way video sharing: 
-
- [Data Update to Achieve Video Sharing Part1](https://www.bilibili.com/video/BV1934y1E7Q5/)
- [Data Update to Achieve Video Sharing part2](https://www.bilibili.com/video/BV1pF411j7Aw/)
--- a/binding/LabVIEW/BinarySearch.vi
+++ b/binding/LabVIEW/BinarySearch.vi
--- a/binding/LabVIEW/Close.vi
+++ b/binding/LabVIEW/Close.vi
--- a/binding/LabVIEW/Example.vi
+++ b/binding/LabVIEW/Example.vi
--- a/binding/LabVIEW/Get
+++ b/binding/LabVIEW/Get
--- a/binding/LabVIEW/Open.vi
+++ b/binding/LabVIEW/Open.vi
--- a/binding/LabVIEW/ip2region.ctl
+++ b/binding/LabVIEW/ip2region.ctl
--- a/binding/LabVIEW/ip2region.db
+++ b/binding/LabVIEW/ip2region.db
--- a/binding/LabVIEW/ip2region.lvlib
+++ b/binding/LabVIEW/ip2region.lvlib
@ -1,13 +0,0 @@
-<?xml version='1.0' encoding='UTF-8'?>
-<Library LVVersion="19008000">
-	<Property Name="NI.Lib.Icon" Type="Bin">'1#!!!!!!!)!"1!&amp;!!!-!%!!!@````]!!!!"!!%!!!(]!!!*Q(C=\&gt;7R=2MR%!81N=?"5Q&lt;/07RB7W!,&lt;'&amp;&lt;9+K1,7Q,&lt;)%N&lt;!NMA3X)DW?-RJ(JQ"I\%%Z,(@`BA#==ZB3RN;]28_,V7@PWW`:R`&gt;HV*SU_WE@\N_XF[3:^^TX\+2YP)D7K6;G-RV3P)R`ZS%=_]J'XP/5N&lt;XH,7V\SEJ?]Z#5P?=J4HP+5JTTFWS%0?=B$DD1G(R/.1==!IT.+D)`B':\B'2Z@9XC':XC':XBUC?%:HO%:HO&amp;R7QT0]!T0]!S0I4&lt;*&lt;)?=:XA-(]X40-X40-VDSGC?"GC4N9(&lt;)"D2,L;4ZGG?ZH%;T&gt;-]T&gt;-]T?.S.%`T.%`T.)^&lt;NF8J4@-YZ$S'C?)JHO)JHO)R&gt;"20]220]230[;*YCK=ASI2F=)1I.Z5/Z5PR&amp;)^@54T&amp;5TT&amp;5TQO&lt;5_INJ6Z;"[(H#&gt;ZEC&gt;ZEC&gt;Z$"(*ETT*ETT*9^B)HO2*HO2*(F.&amp;]C20]C2)GN4UE1:,.[:/+5A?0^NOS?UJ^3&lt;*\9B9GT@7JISVW7*NIFC&lt;)^:$D`5Q9TWE7)M@;V&amp;D,6;M29DVR]6#R],%GC47T9_/=@&gt;Z5V&gt;V57&gt;V5E&gt;V5(OV?^T[FTP?\`?YX7ZRP6\D=LH%_8S/U_E5R_-R$I&gt;$\0@\W/VW&lt;[_"\Y[X&amp;],0^^+,]T_J&gt;`J@_B_]'_.T`$KO.@I"XC-_N!!!!!!</Property>
-	<Property Name="NI.Lib.SourceVersion" Type="Int">419463168</Property>
-	<Property Name="NI.Lib.Version" Type="Str">1.0.0.0</Property>
-	<Property Name="NI.LV.All.SourceOnly" Type="Bool">false</Property>
-	<Item Name="binarySearch.vi" Type="VI" URL="../binarySearch.vi"/>
-	<Item Name="Close.vi" Type="VI" URL="../Close.vi"/>
-	<Item Name="example.vi" Type="VI" URL="../example.vi"/>
-	<Item Name="Get data.vi" Type="VI" URL="../Get data.vi"/>
-	<Item Name="ip2region.ctl" Type="VI" URL="../ip2region.ctl"/>
-	<Item Name="Open.vi" Type="VI" URL="../Open.vi"/>
-</Library>
--- a/binding/LabVIEW/readme.md
+++ b/binding/LabVIEW/readme.md
@ -1,7 +0,0 @@
-ip2region的LabVIEW库<br>
-使用方法：1. 将该目录下的所有文件复制到你的项目文件夹下；<br>
-         2. 导入ip2region.lvlib库文件；<br>
-         3. 查看Example.vi，了解使用方法<br>
-         <br>
-         <br>
-注意：该库依赖ni_lib_unicode-2.0.1.5.vip，请使用VIPM安装。
--- a/binding/c#/IP2Region.Test.Benchmark/DbSearch_Test.cs
+++ b/binding/c#/IP2Region.Test.Benchmark/DbSearch_Test.cs
@ -1,54 +0,0 @@
-using BenchmarkDotNet.Attributes;
-using IP2Region.Models;
-using System.Threading.Tasks;
-
-namespace IP2Region.Test.Benchmark
-{
-    [RankColumn]
-    public class DbSearch_Test : TestBase
-    {
-        private string RandomIP = "";
-
-        [Benchmark]
-        public DataBlock MemorySearch()
-        {
-            RandomIP = GetRandomIP();
-            return _search.MemorySearch(RandomIP);
-        }
-
-        [Benchmark]
-        public async Task<DataBlock> MemorySearch_Async()
-        {
-            RandomIP = GetRandomIP();
-            return await _search.MemorySearchAsync(RandomIP);
-        }
-
-        [Benchmark]
-        public DataBlock BinarySearch()
-        {
-            RandomIP = GetRandomIP();
-            return _search.BinarySearch(RandomIP);
-        }
-
-        [Benchmark]
-        public async Task<DataBlock> BinarySearch_Async()
-        {
-            RandomIP = GetRandomIP();
-            return await _search.BinarySearchAsync(RandomIP);
-        }
-
-        [Benchmark]
-        public DataBlock BtreeSearch()
-        {
-            RandomIP = GetRandomIP();
-            return _search.BtreeSearch(RandomIP);
-        }
-
-        [Benchmark]
-        public async Task<DataBlock> BtreeSearch_Async()
-        {
-            RandomIP = GetRandomIP();
-            return await _search.BtreeSearchAsync(RandomIP);
-        }
-    }
-}
--- a/binding/c#/IP2Region.Test.Benchmark/IP2Region.Test.Benchmark.csproj
+++ b/binding/c#/IP2Region.Test.Benchmark/IP2Region.Test.Benchmark.csproj
@ -1,16 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.11.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\IP2Region\IP2Region.csproj" />
-  </ItemGroup>
-
-</Project>
--- a/binding/c#/IP2Region.Test.Benchmark/Program.cs
+++ b/binding/c#/IP2Region.Test.Benchmark/Program.cs
@ -1,15 +0,0 @@
-using BenchmarkDotNet.Running;
-using System;
-
-namespace IP2Region.Test.Benchmark
-{
-    class Program
-    {
-        static void Main(string[] args)
-        {
-            Console.WriteLine("Now starting benchmark test, please wait......");
-            var summary = BenchmarkRunner.Run<DbSearch_Test>();
-            Console.ReadLine();
-        }
-    }
-}
--- a/binding/c#/IP2Region.Test.Benchmark/TestBase.cs
+++ b/binding/c#/IP2Region.Test.Benchmark/TestBase.cs
@ -1,49 +0,0 @@
-using BenchmarkDotNet.Attributes;
-using System;
-
-namespace IP2Region.Test.Benchmark
-{
-    public class TestBase
-    {
-        protected DbSearcher _search;
-
-        private readonly string _dBFilePath = "";
-        public TestBase()
-        {
-
-        }
-
-        public TestBase(String DBFilePath)
-        {
-            _dBFilePath = DBFilePath;
-        }
-
-        [GlobalSetup]
-        public void Init()
-        {
-            if (String.IsNullOrEmpty(_dBFilePath))
-            {
-                _search = new DbSearcher(AppContext.BaseDirectory + @"\DB\ip2region.db");
-            }
-            else
-            {
-                _search = new DbSearcher(_dBFilePath);
-            }
-
-        }
-
-        [GlobalCleanup]
-        public void Dispose()
-        {
-            _search.Dispose();
-        }
-
-        public String GetRandomIP()
-        {
-            return new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString() + "."
-                + new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString() + "."
-                  + new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString() + "."
-                    + new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString();
-        }
-    }
-}
--- a/binding/c#/IP2Region.Test.xUnit/DB/ip2region.db
+++ b/binding/c#/IP2Region.Test.xUnit/DB/ip2region.db
--- a/binding/c#/IP2Region.Test.xUnit/IP2Region.Test.xUnit.csproj
+++ b/binding/c#/IP2Region.Test.xUnit/IP2Region.Test.xUnit.csproj
@ -1,26 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
-
-    <IsPackable>false</IsPackable>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.0" />
-    <PackageReference Include="xunit" Version="2.3.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
-    <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\IP2Region\IP2Region.csproj" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <None Update="DB\ip2region.db">
-      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-    </None>
-  </ItemGroup>
-
-</Project>
--- a/binding/c#/IP2Region.Test.xUnit/SearchTest.cs
+++ b/binding/c#/IP2Region.Test.xUnit/SearchTest.cs
@ -1,74 +0,0 @@
-using System;
-using System.Threading.Tasks;
-using Xunit;
-
-namespace IP2Region.Test.xUnit
-{
-    public class SearchTest : IDisposable
-    {
-        private readonly DbSearcher _search;
-
-        public String GetRandomIP()
-        {
-            return new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString() + "."
-                + new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString() + "."
-                  + new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString() + "."
-                    + new Random(Guid.NewGuid().GetHashCode()).Next(0, 255).ToString();
-        }
-
-        public SearchTest()
-        {
-            _search = new DbSearcher(Environment.CurrentDirectory + @"\DB\ip2region.db");
-        }
-        [Fact]
-        public void Search_Test()
-        {
-            string memResult = _search.MemorySearch("223.104.246.20").Region;
-            string binarySearchResult = _search.BinarySearch("223.104.246.20").Region;
-            string binaryTreeSearchResult = _search.BtreeSearch("223.104.246.20").Region;
-
-            Assert.NotNull(memResult);
-            Assert.NotNull(binarySearchResult);
-            Assert.NotNull(binaryTreeSearchResult);
-
-            Assert.Equal(memResult, binarySearchResult);
-            Assert.Equal(binaryTreeSearchResult, memResult);
-        }
-
-        [Fact]
-        public void Search_Correct_Test()
-        {
-            for (int i = 0; i < 1000000; i++)
-            {
-                var newIp=GetRandomIP();
-                string memResult = _search.MemorySearch(newIp).Region;
-                string binarySearchResult = _search.BinarySearch(newIp).Region;
-                string binaryTreeSearchResult = _search.BtreeSearch(newIp).Region;
-
-                Assert.True(memResult == binarySearchResult && memResult == binaryTreeSearchResult);
-            }
-
-        }
-
-        [Fact]
-        public async Task SearchAsync_Test()
-        {
-            // We don't need the synchronizeContext, so just set to false
-            var memResult = await _search.MemorySearchAsync("183.192.62.65").ConfigureAwait(false);
-            var binarySearchResult = await _search.BinarySearchAsync("183.192.62.65").ConfigureAwait(false);
-            var bTreeSearchResult = await _search.BtreeSearchAsync("183.192.62.65").ConfigureAwait(false);
-
-            Assert.NotNull(memResult.Region);
-            Assert.NotNull(binarySearchResult.Region);
-            Assert.NotNull(bTreeSearchResult.Region);
-
-            Assert.Equal(memResult.Region, binarySearchResult.Region);
-            Assert.Equal(bTreeSearchResult.Region, memResult.Region);
-        }
-
-        public void Dispose()
-        {
-            _search.Dispose();
-        }
-    }
-}
--- a/binding/c#/IP2Region/DB/ip2region.db
+++ b/binding/c#/IP2Region/DB/ip2region.db
--- a/binding/c#/IP2Region/DBSearcher.cs
+++ b/binding/c#/IP2Region/DBSearcher.cs
@ -1,412 +0,0 @@
-//*******************************
-// Created By Rocher Kong 
-// Github https://github.com/RocherKong
-// Date 2018.02.09
-//*******************************
-
-using IP2Region.Models;
-using System;
-using System.IO;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace IP2Region
-{
-    public class DbSearcher : IDisposable
-    {
-        const int BTREE_ALGORITHM = 1;
-        const int BINARY_ALGORITHM = 2;
-        const int MEMORY_ALGORITYM = 3;
-
-        private DbConfig _dbConfig = null;
-
-        /// <summary>
-        /// db file access handler
-        /// </summary>
-        private Stream _raf = null;
-
-        /// <summary>
-        /// header blocks buffer
-        /// </summary>
-        private long[] _headerSip = null;
-        private int[] _headerPtr = null;
-        private int _headerLength;
-
-        /// <summary>
-        /// super blocks info 
-        /// </summary>
-        private long _firstIndexPtr = 0;
-        private long _lastIndexPtr = 0;
-        private int _totalIndexBlocks = 0;
-
-        /// <summary>
-        /// for memory mode
-        /// the original db binary string
-        /// </summary>
-        private byte[] _dbBinStr = null;
-
-        /// <summary>
-        /// Get by index ptr.
-        /// </summary>
-        private DataBlock GetByIndexPtr(long ptr)
-        {
-            _raf.Seek(ptr, SeekOrigin.Begin);
-            byte[] buffer = new byte[12];
-            _raf.Read(buffer, 0, buffer.Length);
-            long extra = Utils.GetIntLong(buffer, 8);
-            int dataLen = (int)((extra >> 24) & 0xFF);
-            int dataPtr = (int)((extra & 0x00FFFFFF));
-            _raf.Seek(dataPtr, SeekOrigin.Begin);
-            byte[] data = new byte[dataLen];
-            _raf.Read(data, 0, data.Length);
-            int city_id = (int)Utils.GetIntLong(data, 0);
-            string region = Encoding.UTF8.GetString(data, 4, data.Length - 4);
-            return new DataBlock(city_id, region, dataPtr);
-        }
-
-        public DbSearcher(DbConfig dbConfig, string dbFile)
-        {
-            if (_dbConfig == null)
-            {
-                _dbConfig = dbConfig;
-            }
-            _raf = new FileStream(dbFile, FileMode.Open, FileAccess.Read, FileShare.Read);
-        }
-
-        public DbSearcher(string dbFile) : this(null, dbFile) { }
-
-        public DbSearcher(DbConfig dbConfig, Stream dbFileStream)
-        {
-            if (_dbConfig == null)
-            {
-                _dbConfig = dbConfig;
-            }
-
-            _raf = dbFileStream;
-        }
-
-        public DbSearcher(Stream dbFileStream) : this(null, dbFileStream) { }
-
-        #region Sync Methods
-        /// <summary>
-        /// Get the region with a int ip address with memory binary search algorithm.
-        /// </summary>
-        private DataBlock MemorySearch(long ip)
-        {
-            int blen = IndexBlock.LENGTH;
-            if (_dbBinStr == null)
-            {
-                _dbBinStr = new byte[(int)_raf.Length];
-                _raf.Seek(0L, SeekOrigin.Begin);
-                _raf.Read(_dbBinStr, 0, _dbBinStr.Length);
-
-                //initialize the global vars
-                _firstIndexPtr = Utils.GetIntLong(_dbBinStr, 0);
-                _lastIndexPtr = Utils.GetIntLong(_dbBinStr, 4);
-                _totalIndexBlocks = (int)((_lastIndexPtr - _firstIndexPtr) / blen) + 1;
-            }
-
-            //search the index blocks to define the data
-            int l = 0, h = _totalIndexBlocks;
-            long sip = 0;
-
-            while (l <= h)
-            {
-                int m = (l + h) >> 1;
-                int p = (int)(_firstIndexPtr + m * blen);
-
-                sip = Utils.GetIntLong(_dbBinStr, p);
-
-                if (ip < sip)
-                {
-                    h = m - 1;
-                }
-                else
-                {
-                    sip = Utils.GetIntLong(_dbBinStr, p + 4);
-                    if (ip > sip)
-                    {
-                        l = m + 1;
-                    }
-                    else
-                    {
-                        sip = Utils.GetIntLong(_dbBinStr, p + 8);
-                        break;
-                    }
-                }
-            }
-
-            //not matched
-            if (sip == 0) return null;
-
-            //get the data
-            int dataLen = (int)((sip >> 24) & 0xFF);
-            int dataPtr = (int)((sip & 0x00FFFFFF));
-            int city_id = (int)Utils.GetIntLong(_dbBinStr, dataPtr);
-            string region = Encoding.UTF8.GetString(_dbBinStr, dataPtr + 4, dataLen - 4);//new String(dbBinStr, dataPtr + 4, dataLen - 4, Encoding.UTF8);
-
-            return new DataBlock(city_id, region, dataPtr);
-        }
-
-        /// <summary>
-        /// Get the region throught the ip address with memory binary search algorithm.
-        /// </summary>
-        public DataBlock MemorySearch(string ip)
-        {
-            return MemorySearch(Utils.Ip2long(ip));
-        }
-
-        /// <summary>
-        /// Get the region with a int ip address with b-tree algorithm.
-        /// </summary>
-        private DataBlock BtreeSearch(long ip)
-        {
-            //check and load the header
-            if (_headerSip == null)
-            {
-                _raf.Seek(8L, SeekOrigin.Begin);    //pass the super block
-                byte[] b = new byte[4096];
-                _raf.Read(b, 0, b.Length);
-                //fill the header
-                int len = b.Length >> 3, idx = 0;  //b.lenght / 8
-                _headerSip = new long[len];
-                _headerPtr = new int[len];
-                long startIp, dataPtrTemp;
-                for (int i = 0; i < b.Length; i += 8)
-                {
-                    startIp = Utils.GetIntLong(b, i);
-                    dataPtrTemp = Utils.GetIntLong(b, i + 4);
-                    if (dataPtrTemp == 0) break;
-
-                    _headerSip[idx] = startIp;
-                    _headerPtr[idx] = (int)dataPtrTemp;
-                    idx++;
-                }
-                _headerLength = idx;
-            }
-
-            //1. define the index block with the binary search
-            if (ip == _headerSip[0])
-            {
-                return GetByIndexPtr(_headerPtr[0]);
-            }
-            else if (ip == _headerPtr[_headerLength - 1])
-            {
-                return GetByIndexPtr(_headerPtr[_headerLength - 1]);
-            }
-            int l = 0, h = _headerLength, sptr = 0, eptr = 0;
-            int m = 0;
-            while (l <= h)
-            {
-                m = (l + h) >> 1;
-                //perfectly matched, just return it
-                if (ip == _headerSip[m])
-                {
-                    if (m > 0)
-                    {
-                        sptr = _headerPtr[m - 1];
-                        eptr = _headerPtr[m];
-                    }
-                    else
-                    {
-                        sptr = _headerPtr[m];
-                        eptr = _headerPtr[m + 1];
-                    }
-                }
-                //less then the middle value
-                else if (ip < _headerSip[m])
-                {
-                    if (m == 0)
-                    {
-                        sptr = _headerPtr[m];
-                        eptr = _headerPtr[m + 1];
-                        break;
-                    }
-                    else if (ip > _headerSip[m - 1])
-                    {
-                        sptr = _headerPtr[m - 1];
-                        eptr = _headerPtr[m];
-                        break;
-                    }
-                    h = m - 1;
-                }
-                else
-                {
-                    if (m == _headerLength - 1)
-                    {
-                        sptr = _headerPtr[m - 1];
-                        eptr = _headerPtr[m];
-                        break;
-                    }
-                    else if (ip <= _headerSip[m + 1])
-                    {
-                        sptr = _headerPtr[m];
-                        eptr = _headerPtr[m + 1];
-                        break;
-                    }
-                    l = m + 1;
-                }
-            }
-            //match nothing just stop it
-            if (sptr == 0) return null;
-            //2. search the index blocks to define the data
-            int blockLen = eptr - sptr, blen = IndexBlock.LENGTH;
-            byte[] iBuffer = new byte[blockLen + blen];    //include the right border block
-            _raf.Seek(sptr, SeekOrigin.Begin);
-            _raf.Read(iBuffer, 0, iBuffer.Length);
-            l = 0; h = blockLen / blen;
-            long sip = 0;
-            int p = 0;
-            while (l <= h)
-            {
-                m = (l + h) >> 1;
-                p = m * blen;
-                sip = Utils.GetIntLong(iBuffer, p);
-                if (ip < sip)
-                {
-                    h = m - 1;
-                }
-                else
-                {
-                    sip = Utils.GetIntLong(iBuffer, p + 4);
-                    if (ip > sip)
-                    {
-                        l = m + 1;
-                    }
-                    else
-                    {
-                        sip = Utils.GetIntLong(iBuffer, p + 8);
-                        break;
-                    }
-                }
-            }
-            //not matched
-            if (sip == 0) return null;
-            //3. get the data
-            int dataLen = (int)((sip >> 24) & 0xFF);
-            int dataPtr = (int)((sip & 0x00FFFFFF));
-            _raf.Seek(dataPtr, SeekOrigin.Begin);
-            byte[] data = new byte[dataLen];
-            _raf.Read(data, 0, data.Length);
-            int city_id = (int)Utils.GetIntLong(data, 0);
-            String region = Encoding.UTF8.GetString(data, 4, data.Length - 4);// new String(data, 4, data.Length - 4, "UTF-8");
-            return new DataBlock(city_id, region, dataPtr);
-        }
-
-        /// <summary>
-        /// Get the region throught the ip address with b-tree search algorithm.
-        /// </summary>
-        public DataBlock BtreeSearch(string ip)
-        {
-            return BtreeSearch(Utils.Ip2long(ip));
-        }
-
-        /// <summary>
-        /// Get the region with a int ip address with binary search algorithm.
-        /// </summary>
-        private DataBlock BinarySearch(long ip)
-        {
-            int blen = IndexBlock.LENGTH;
-            if (_totalIndexBlocks == 0)
-            {
-                _raf.Seek(0L, SeekOrigin.Begin);
-                byte[] superBytes = new byte[8];
-                _raf.Read(superBytes, 0, superBytes.Length);
-                //initialize the global vars
-                _firstIndexPtr = Utils.GetIntLong(superBytes, 0);
-                _lastIndexPtr = Utils.GetIntLong(superBytes, 4);
-                _totalIndexBlocks = (int)((_lastIndexPtr - _firstIndexPtr) / blen) + 1;
-            }
-
-            //search the index blocks to define the data
-            int l = 0, h = _totalIndexBlocks;
-            byte[] buffer = new byte[blen];
-            long sip = 0;
-            while (l <= h)
-            {
-                int m = (l + h) >> 1;
-                _raf.Seek(_firstIndexPtr + m * blen, SeekOrigin.Begin);    //set the file pointer
-                _raf.Read(buffer, 0, buffer.Length);
-                sip = Utils.GetIntLong(buffer, 0);
-                if (ip < sip)
-                {
-                    h = m - 1;
-                }
-                else
-                {
-                    sip = Utils.GetIntLong(buffer, 4);
-                    if (ip > sip)
-                    {
-                        l = m + 1;
-                    }
-                    else
-                    {
-                        sip = Utils.GetIntLong(buffer, 8);
-                        break;
-                    }
-                }
-            }
-            //not matched
-            if (sip == 0) return null;
-            //get the data
-            int dataLen = (int)((sip >> 24) & 0xFF);
-            int dataPtr = (int)((sip & 0x00FFFFFF));
-            _raf.Seek(dataPtr, SeekOrigin.Begin);
-            byte[] data = new byte[dataLen];
-            _raf.Read(data, 0, data.Length);
-            int city_id = (int)Utils.GetIntLong(data, 0);
-            String region = Encoding.UTF8.GetString(data, 4, data.Length - 4);//new String(data, 4, data.Length - 4, "UTF-8");
-            return new DataBlock(city_id, region, dataPtr);
-        }
-
-        /// <summary>
-        /// Get the region throught the ip address with binary search algorithm.
-        /// </summary>
-        public DataBlock BinarySearch(String ip)
-        {
-            return BinarySearch(Utils.Ip2long(ip));
-        }
-        #endregion
-
-        #region Async Methods
-        /// <summary>
-        /// Get the region throught the ip address with memory binary search algorithm.
-        /// </summary>
-        public Task<DataBlock> MemorySearchAsync(string ip)
-        {
-            return Task.FromResult(MemorySearch(ip));
-        }
-        /// <summary>
-        /// Get the region throught the ip address with b-tree search algorithm.
-        /// </summary>
-        public Task<DataBlock> BtreeSearchAsync(string ip)
-        {
-            return Task.FromResult(BtreeSearch(ip));
-        }
-        /// <summary>
-        /// Get the region throught the ip address with binary search algorithm.
-        /// </summary>
-        public Task<DataBlock> BinarySearchAsync(string ip)
-        {
-            return Task.FromResult(BinarySearch(ip));
-        }
-        #endregion
-
-        /// <summary>
-        /// Close the db.
-        /// </summary>
-        public void Close()
-        {
-            _headerSip = null;
-            _headerPtr = null;
-            _dbBinStr = null;
-            _raf.Close();
-        }
-
-        public void Dispose()
-        {
-            Close();
-        }
-    }
-
-}
--- a/binding/c#/IP2Region/IP2Region.csproj
+++ b/binding/c#/IP2Region/IP2Region.csproj
@ -1,26 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;net46;net45;net47</TargetFrameworks>
-    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <Authors>Rocher</Authors>
-    <Company>Rocher</Company>
-    <Description>准确率99.9%的ip地址定位库，0.0x毫秒级查询, 支持Binary,B树,内存三种查询算法，妈妈再也不用担心我的ip地址定位！</Description>
-    <PackageReleaseNotes>ip2region - 最自由的ip地址查询库，ip到地区的映射库，提供Binary,B树和纯内存三种查询算法，妈妈再也不用担心我的ip地址定位。</PackageReleaseNotes>
-    <Copyright>Rocher</Copyright>
-    <PackageTags>ip2region c# IP</PackageTags>
-    <RepositoryUrl>https://gitee.com/rocherkong/IP2Region</RepositoryUrl>
-    <Version>1.2.0</Version>
-  </PropertyGroup>
-
-  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Debug|netstandard2.0|AnyCPU'">
-    <LangVersion>7</LangVersion>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <None Update="DB\ip2region.db">
-      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-    </None>
-  </ItemGroup>
-
-</Project>
--- a/binding/c#/IP2Region/Models/DataBlock.cs
+++ b/binding/c#/IP2Region/Models/DataBlock.cs
@ -1,50 +0,0 @@
-//*******************************
-// Created By Rocher Kong 
-// Github https://github.com/RocherKong
-// Date 2018.02.09
-//*******************************
-namespace IP2Region.Models
-{
-    public class DataBlock
-    {
-        #region Private Properties
-        public int CityID
-        {
-            get;
-            private set;
-        }
-
-        public string Region
-        {
-            get;
-            private set;
-        }
-
-        public int DataPtr
-        {
-            get;
-            private set;
-        }
-        #endregion
-
-        #region Constructor
-        public DataBlock(int city_id, string region, int dataPtr = 0)
-        {
-            CityID = city_id;
-            Region = region;
-            DataPtr = dataPtr;
-        }
-
-        public DataBlock(int city_id, string region):this(city_id,region,0)
-        {
-        }
-        #endregion
-
-        public override string ToString()
-        {
-            return $"{CityID}|{Region}|{DataPtr}";
-        }
-
-    }
-
-}
--- a/binding/c#/IP2Region/Models/DbConfig.cs
+++ b/binding/c#/IP2Region/Models/DbConfig.cs
@ -1,49 +0,0 @@
-//*******************************
-// Created By Rocher Kong 
-// Github https://github.com/RocherKong
-// Date 2018.02.09
-//*******************************
-using System;
-
-namespace IP2Region.Models
-{
-    public class DbMakerConfigException : Exception
-    {
-        public string ErrMsg { get; private set; }
-        public DbMakerConfigException(string errMsg)
-        {
-            ErrMsg = errMsg;
-        }
-    }
-
-    public class DbConfig
-    {
-        public int TotalHeaderSize
-        {
-            get;
-            private set;
-        }
-
-        public int indexBlockSize
-        {
-            get;
-            private set;
-        }
-
-        public DbConfig(int totalHeaderSize)
-        {
-            if ((totalHeaderSize % 8) != 0)
-            {
-                throw new DbMakerConfigException("totalHeaderSize must be times of 8");
-            }
-            TotalHeaderSize = totalHeaderSize;
-            //4 * 2048
-            indexBlockSize = 8192; 
-        }
-
-        public DbConfig():this(8 * 2048)
-        {
-        }
-    }
-
-}
--- a/binding/c#/IP2Region/Models/HeaderBlock.cs
+++ b/binding/c#/IP2Region/Models/HeaderBlock.cs
@ -1,49 +0,0 @@
-//*******************************
-// Created By Rocher Kong 
-// Github https://github.com/RocherKong
-// Date 2018.02.09
-//*******************************
-
-namespace IP2Region.Models
-{
-    internal class HeaderBlock
-    {
-        public long IndexStartIp
-        {
-            get;
-            private set;
-        }
-
-        public int IndexPtr
-        {
-            get;
-            private set;
-        }
-
-        public HeaderBlock(long indexStartIp, int indexPtr)
-        {
-            IndexStartIp = indexStartIp;
-            IndexPtr = indexPtr;
-        }
-
-        /// <summary>
-        /// Get the bytes for total storage
-        /// </summary>
-        /// <returns>
-        /// Bytes gotten.
-        /// </returns>
-        public byte[] GetBytes()
-        {
-            /*
-             * +------------+-----------+
-             * | 4bytes     | 4bytes    |
-             * +------------+-----------+
-             *  start ip      index ptr
-            */
-            byte[] b = new byte[8];
-            Utils.WriteIntLong(b, 0, IndexStartIp);
-            Utils.WriteIntLong(b, 4, IndexPtr);
-            return b;
-        }
-    }
-}
--- a/binding/c#/IP2Region/Models/IndexBlock.cs
+++ b/binding/c#/IP2Region/Models/IndexBlock.cs
@ -1,65 +0,0 @@
-//*******************************
-// Created By Rocher Kong 
-// Github https://github.com/RocherKong
-// Date 2018.02.09
-//*******************************
-
-namespace IP2Region
-{
-    internal class IndexBlock
-    {
-        public const int LENGTH = 12;
-
-        public long StartIP
-        {
-            get;
-            private set;
-        }
-
-        public long EndIp
-        {
-            get;
-            private set;
-        }
-
-        public uint DataPtr
-        {
-            get;
-            private set;
-        }
-
-        public int DataLen
-        {
-            get;
-            private set;
-        }
-
-        public IndexBlock(long startIp, long endIp, uint dataPtr, int dataLen)
-        {
-            StartIP = startIp;
-            EndIp = endIp;
-            DataPtr = dataPtr;
-            DataLen = dataLen;
-        }
-
-        public byte[] GetBytes()
-        {
-            /*
-             * +------------+-----------+-----------+
-             * | 4bytes     | 4bytes    | 4bytes    |
-             * +------------+-----------+-----------+
-             *  start ip      end ip      data ptr + len 
-            */
-            byte[] b = new byte[12];
-
-            Utils.WriteIntLong(b, 0, StartIP);    //start ip
-            Utils.WriteIntLong(b, 4, EndIp);        //end ip
-
-            //write the data ptr and the length
-            long mix = DataPtr | ((DataLen << 24) & 0xFF000000L);
-            Utils.WriteIntLong(b, 8, mix);
-
-            return b;
-        }
-    }
-}
--- a/binding/c#/IP2Region/Utils.cs
+++ b/binding/c#/IP2Region/Utils.cs
@ -1,122 +0,0 @@
-//*******************************
-// Created By Rocher Kong 
-// Github https://github.com/RocherKong
-// Date 2018.02.09
-//*******************************
-
-using System;
-
-namespace IP2Region
-{
-    public class IPInValidException : Exception
-    {
-        const string ERROR_MSG = "IP Illigel. Please input a valid IP.";
-        public IPInValidException() : base(ERROR_MSG) { }
-    }
-    internal static class Utils
-    {
-        /// <summary>
-        /// Write specfield bytes to a byte array start from offset.
-        /// </summary>
-        public static void Write(byte[] b, int offset, ulong v, int bytes)
-        {
-            for (int i = 0; i < bytes; i++)
-            {
-                b[offset++] = (byte)((v >> (8 * i)) & 0xFF);
-            }
-        }
-
-        /// <summary>
-        /// Write a int to a byte array.
-        /// </summary>
-        public static void WriteIntLong(byte[] b, int offset, long v)
-        {
-            b[offset++] = (byte)((v >> 0) & 0xFF);
-            b[offset++] = (byte)((v >> 8) & 0xFF);
-            b[offset++] = (byte)((v >> 16) & 0xFF);
-            b[offset] = (byte)((v >> 24) & 0xFF);
-        }
-
-        /// <summary>
-        /// Get a int from a byte array start from the specifiled offset.
-        /// </summary>
-        public static long GetIntLong(byte[] b, int offset)
-        {
-            return (
-                ((b[offset++] & 0x000000FFL)) |
-                ((b[offset++] << 8) & 0x0000FF00L) |
-                ((b[offset++] << 16) & 0x00FF0000L) |
-                ((b[offset] << 24) & 0xFF000000L)
-            );
-        }
-
-        /// <summary>
-        /// Get a int from a byte array start from the specifield offset.
-        /// </summary>
-        public static int GetInt3(byte[] b, int offset)
-        {
-            return (
-                (b[offset++] & 0x000000FF) |
-                (b[offset++] & 0x0000FF00) |
-                (b[offset] & 0x00FF0000)
-            );
-        }
-
-        public static int GetInt2(byte[] b, int offset)
-        {
-            return (
-                (b[offset++] & 0x000000FF) |
-                (b[offset] & 0x0000FF00)
-            );
-        }
-
-        public static int GetInt1(byte[] b, int offset)
-        {
-            return (
-                (b[offset] & 0x000000FF)
-            );
-        }
-        /// <summary>
-        /// String ip to long ip.
-        /// </summary>
-        public static long Ip2long(string ip)
-        {
-            string[] p = ip.Split('.');
-            if (p.Length != 4) throw new IPInValidException();
-
-            foreach (string pp in p)
-            {
-                if (pp.Length > 3) throw new IPInValidException();
-                if (!int.TryParse(pp, out int value) || value > 255)
-                {
-                    throw new IPInValidException();
-                }
-            }
-            var bip1 = long.TryParse(p[0], out long ip1);
-            var bip2 = long.TryParse(p[1], out long ip2);
-            var bip3 = long.TryParse(p[2], out long ip3);
-            var bip4 = long.TryParse(p[3], out long ip4);
-
-            if (!bip1 || !bip2 || !bip3 || !bip4
-                || ip4 > 255 || ip1 > 255 || ip2 > 255 || ip3 > 255
-                || ip4 < 0 || ip1 < 0 || ip2 < 0 || ip3 < 0)
-            {
-                throw new IPInValidException();
-            }
-            long p1 = ((ip1 << 24) & 0xFF000000);
-            long p2 = ((ip2 << 16) & 0x00FF0000);
-            long p3 = ((ip3 << 8) & 0x0000FF00);
-            long p4 = ((ip4 << 0) & 0x000000FF);
-            return ((p1 | p2 | p3 | p4) & 0xFFFFFFFFL);
-        }
-
-        /// <summary>
-        /// Int to ip string.
-        /// </summary>
-        public static string Long2ip(long ip)
-        {
-            return $"{(ip >> 24) & 0xFF}.{(ip >> 16) & 0xFF}.{(ip >> 8) & 0xFF}.{ip & 0xFF}";
-        }
-    }
-
-}
--- a/binding/c#/IP2Region_NetFx_Test/App.config
+++ b/binding/c#/IP2Region_NetFx_Test/App.config
@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<configuration>
-    <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
-    </startup>
-</configuration>
--- a/binding/c#/IP2Region_NetFx_Test/DB/ip2region.db
+++ b/binding/c#/IP2Region_NetFx_Test/DB/ip2region.db
--- a/binding/c#/IP2Region_NetFx_Test/IP2Region_NetFx_Test.csproj
+++ b/binding/c#/IP2Region_NetFx_Test/IP2Region_NetFx_Test.csproj
@ -1,60 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
-  <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{2D73D7EB-AE36-4039-A839-DA40209052A4}</ProjectGuid>
-    <OutputType>Exe</OutputType>
-    <RootNamespace>IP2Region_NetFx_Test</RootNamespace>
-    <AssemblyName>IP2Region_NetFx_Test</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <ItemGroup>
-    <Reference Include="System" />
-    <Reference Include="System.Core" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Data" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Xml" />
-  </ItemGroup>
-  <ItemGroup>
-    <Compile Include="Program.cs" />
-    <Compile Include="Properties\AssemblyInfo.cs" />
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="App.config" />
-    <None Include="DB\ip2region.db">
-      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-    </None>
-  </ItemGroup>
-  <ItemGroup>
-    <ProjectReference Include="..\IP2Region\IP2Region.csproj">
-      <Project>{a27d09f4-4da8-4925-90ec-43e5f5288630}</Project>
-      <Name>IP2Region</Name>
-    </ProjectReference>
-  </ItemGroup>
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-</Project>
--- a/binding/c#/IP2Region_NetFx_Test/Program.cs
+++ b/binding/c#/IP2Region_NetFx_Test/Program.cs
@ -1,17 +0,0 @@
-using IP2Region;
-using System;
-
-namespace IP2Region_NetFx_Test
-{
-    class Program
-    {
-        static void Main(string[] args)
-        {
-            using (var _search = new DbSearcher(Environment.CurrentDirectory + @"\DB\ip2region.db"))
-            {
-                Console.WriteLine(_search.MemorySearch("183.192.62.65").Region);
-                Console.Read();
-            }
-        }
-    }
-}
--- a/binding/c#/IP2Region_NetFx_Test/Properties/AssemblyInfo.cs
+++ b/binding/c#/IP2Region_NetFx_Test/Properties/AssemblyInfo.cs
@ -1,35 +0,0 @@
-using System.Reflection;
-using System.Runtime.InteropServices;
-
-// 有关程序集的一般信息由以下
-// 控制。更改这些特性值可修改
-// 与程序集关联的信息。
-[assembly: AssemblyTitle("IP2Region_NetFx_Test")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("IP2Region_NetFx_Test")]
-[assembly: AssemblyCopyright("Copyright ©  2018")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-// 将 ComVisible 设置为 false 会使此程序集中的类型
-//对 COM 组件不可见。如果需要从 COM 访问此程序集中的类型
-//请将此类型的 ComVisible 特性设置为 true。
-[assembly: ComVisible(false)]
-
-// 如果此项目向 COM 公开，则下列 GUID 用于类型库的 ID
-[assembly: Guid("2d73d7eb-ae36-4039-a839-da40209052a4")]
-
-// 程序集的版本信息由下列四个值组成: 
-//
-//      主版本
-//      次版本
-//      生成号
-//      修订号
-//
-// 可以指定所有值，也可以使用以下所示的 "*" 预置版本号和修订号
-// 方法是按如下所示使用“*”: :
-// [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]
--- a/binding/c#/README.md
+++ b/binding/c#/README.md
@ -1,42 +0,0 @@
-# IP2Region C# Client
-
-## How To Use
-### 1.Install from Nuget. Support .Net Framework (>=4.5) And netstandard 2.0(.net core)
-```powershell
-Install-Package IP2Region
-```
-### 2.Init DbSearcher with [the newest DBFile](https://github.com/lionsoul2014/ip2region/blob/master/data/ip2region.db) Downloaded into your project, and invoke your search methods as below:
-```csharp
-using (var _search = new DbSearcher(Environment.CurrentDirectory + @"\DB\ip2region.db"))
-{
-    _search.MemorySearch("183.192.62.65").Region;
-    _search.BinarySearch("183.192.62.65").Region;
-    _search.BtreeSearch("183.192.62.65").Region;
-}
-```
-For async methods (Methods with the suffix "Async"), just put them with `async` and `await`.
-If you don't need the `SynchronizedContext`, please use `ConfigureAwait(false)`.
-For more about this, please read https://msdn.microsoft.com/en-us/magazine/jj991977.aspx.
-
-```csharp
- public async Task SearchAsync_Test()
-        {
-            // We don't need the synchronizeContext, so just set to false. 
-            // So as for BinarySearchAsync and BtreeSearchAsync
-            var memResult = await _search.MemorySearchAsync("183.192.62.65").ConfigureAwait(false);
-        }
-```
-
-## Test Result(From /IP2Region.Test.Benchmark)
- Method |     Mean |     Error |    StdDev | Rank |
------------------- |---------: |----------: |----------: |-----: |
-MemorySearch | 10.66 us | 0.1424 us | 0.1332 us |    1 |
-MemorySearch_Async | 10.90 us | 0.2060 us | 0.2023 us |    2 |
-BinarySearch | 52.22 us | 0.6403 us | 0.5347 us |    5 |
-BinarySearch_Async | 53.03 us | 1.0271 us | 0.9608 us |    6 |
-BtreeSearch | 19.05 us | 0.2464 us | 0.2305 us |    3 |
-BtreeSearch_Async | 19.40 us | 0.3820 us | 0.6690 us |    4 |
-
-
-Because the speed of the program lookup has been fast, the asynchronous method here is just the packaging of the synchronization method, the essence is the synchronization method, the asynchronous method is not recommended, and asynchronous will bring the performance loss, unless you need the asynchronous call format.
-
--- a/binding/c/Makefile
+++ b/binding/c/Makefile
@ -1,26 +0,0 @@
-A = @
-CFLAGS=	-g
-CC=		gcc
-LIBS= -I./
-LDFLAGS=
-RM = rm -f
-MV = mv
-
-testSearcher: ip2region.o
-	$(A) $(CC) $(CFLAGS) $(LDFLAGS) $(LIBS) -o testSearcher testSearcher.c ip2region.c
-	$(A) $(RM) ip2region.o testSearcher.o
-
-db:
-	$(A) cd ../../;\
-	export LANG=en_US.UTF-8;\
-	java -jar dbMaker-1.2.2.jar -src ./data/ip.merge.txt -region ./data/global_region.csv -dst .;\
-	$(MV) ./ip2region.db ./binding/c/;\
-	cd ./binding/c
-
-all: db testSearcher
-
-
-clean:
-	$(A) $(RM) testSearcher
-	
-.PHONY: all clean testSearcher db
--- a/binding/c/ip2region.c
+++ b/binding/c/ip2region.c
@ -1,441 +0,0 @@
-/**
- * default ip2region implementation
- *
- * @see     #ip2region.h
- * @author  chenxin<chenxin619315@gmail.com>
- * @date    2015-10-30
-*/
-
-#include "ip2region.h"
-#include <stdio.h>
-#include <stdlib.h>
-
-/**
- * create a new ip2region object
- *
- * @param   dbFile path
-*/
-IP2R_API uint_t ip2region_create(ip2region_t ip2rObj, const char *dbFile)
-{
-    memset(ip2rObj, 0x00, sizeof(ip2region_entry));
-    ip2rObj->headerLen = 0;
-    ip2rObj->HeaderSip = (uint_t *) IP2R_MALLOC(TOTAL_HEADER_LENGTH);
-    if ( ip2rObj->HeaderSip == NULL ) {
-        return 0;
-    }
-
-    ip2rObj->HeaderPtr = (uint_t *) IP2R_MALLOC(TOTAL_HEADER_LENGTH);
-    if ( ip2rObj->HeaderPtr == NULL ) {
-        IP2R_FREE(ip2rObj->HeaderSip);
-        return 0;
-    }
-
-    //open the db file
-    ip2rObj->dbHandler = fopen(dbFile, "rb");
-    if ( ip2rObj->dbHandler == NULL  ) {
-        IP2R_FREE(ip2rObj->HeaderSip);
-        IP2R_FREE(ip2rObj->HeaderPtr);
-        //fprintf(stderr, "Fail to open the db file %s\n", ip2rObj>dbFile);
-        //exit(-1);
-        return 0;
-    }
-
-    ip2rObj->firstIndexPtr = 0;
-    ip2rObj->lastIndexPtr  = 0;
-    ip2rObj->totalBlocks   = 0;
-    ip2rObj->dbBinStr      = NULL;
-
-    return 1;
-}
-
-/**
- * destroy the specifield ip2region object
- *
- * @param   ip2region_t
-*/
-IP2R_API uint_t ip2region_destroy(ip2region_t ip2rObj)
-{
-    if ( ip2rObj->HeaderSip != NULL ) {
-        IP2R_FREE(ip2rObj->HeaderSip);
-        ip2rObj->HeaderSip = NULL;
-    }
-
-    if ( ip2rObj->HeaderPtr != NULL ) {
-        IP2R_FREE(ip2rObj->HeaderPtr);
-        ip2rObj->HeaderPtr = NULL;
-    }
-
-    // close the db file resource
-    if ( ip2rObj->dbHandler != NULL ) {
-        fclose(ip2rObj->dbHandler);
-        ip2rObj->dbHandler = NULL;
-    }
-
-    // free the db binary string
-    if ( ip2rObj->dbBinStr != NULL ) {
-        IP2R_FREE(ip2rObj->dbBinStr);
-        ip2rObj->dbBinStr = NULL;
-    }
-
-    return 1;
-}
-
-/**
- * get the region associated with the specified ip address with the memory binary search algorithm
- *
- * @param   ip2rObj
- * @param   ip
- * @param   datablock
-*/
-IP2R_API uint_t ip2region_memory_search(ip2region_t ip2rObj, uint_t ip, datablock_t datablock) 
-{
-    int l, h, m, p;
-    uint_t sip, eip, dptr;
-    int dataLen, dataptr;
-    long filesize;
-    char *buffer;
-
-    if ( ip2rObj->dbBinStr == NULL ) {
-        //get the size of the file
-        fseek(ip2rObj->dbHandler, 0, SEEK_END);
-        filesize = ftell(ip2rObj->dbHandler);
-        fseek(ip2rObj->dbHandler, 0, SEEK_SET);
-
-        //alloc the buffer size
-        ip2rObj->dbBinStr = IP2R_MALLOC(filesize);
-        if ( ip2rObj->dbBinStr == NULL ) {
-            return 0;
-        }
-
-        //now read the whole file
-        if ( fread(ip2rObj->dbBinStr, filesize, 1, ip2rObj->dbHandler) != 1 ) {
-            return 0;
-        }
-
-        buffer = ip2rObj->dbBinStr;
-        ip2rObj->firstIndexPtr = getUnsignedInt(buffer, 0);
-        ip2rObj->lastIndexPtr  = getUnsignedInt(buffer, 4);
-        ip2rObj->totalBlocks   = (ip2rObj->lastIndexPtr-ip2rObj->firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
-    }
-
-    l = 0; h = ip2rObj->totalBlocks; dptr = 0;
-    while ( l <= h ) {
-        m = (l + h) >> 1;
-        p = ip2rObj->firstIndexPtr + m * INDEX_BLOCK_LENGTH;
-
-        buffer = ip2rObj->dbBinStr + p;
-        sip    = getUnsignedInt(buffer, 0);
-        if ( ip < sip ) {
-            h = m - 1;
-        } else {
-            eip = getUnsignedInt(buffer, 4);
-            if ( ip > eip ) {
-                l = m + 1;
-            } else {
-                dptr = getUnsignedInt(buffer, 8);
-                break;
-            }
-        }
-    }
-
-    if ( dptr == 0 ) return 0;
-
-    //get the data
-    dataLen = ((dptr >> 24) & 0xFF);
-    dataptr = (dptr & 0x00FFFFFF);
-    buffer  = ip2rObj->dbBinStr + dataptr;
-
-    //fill the data to the datablock
-    datablock->city_id = getUnsignedInt(buffer, 0);
-    dataLen -= 4;    //reduce the length of the city_id
-    memcpy(datablock->region, buffer + 4, dataLen); 
-    datablock->region[dataLen] = '\0';
-
-    return 1;
-}
-
-IP2R_API uint_t ip2region_memory_search_string(ip2region_t ip2rObj, const char *ip, datablock_t datablock)
-{
-    return ip2region_memory_search(ip2rObj, ip2long(ip), datablock);
-}
-
-/**
- * get the region associated with the specifield ip address with binary search algorithm
- *
- * @param   ip2rObj
- * @param   ip
- * @param   datablock
- * @return  uint_t
-*/
-IP2R_API uint_t ip2region_binary_search(ip2region_t ip2rObj, uint_t ip, datablock_t datablock)
-{
-    int l, h, m, p;
-    uint_t sip, eip, dptr;
-    char buffer[256];
-    int dataLen, dataptr;
-
-    if ( ip2rObj->totalBlocks == 0 ) {
-        fseek(ip2rObj->dbHandler, 0, 0);
-        if ( fread(buffer, 8, 1, ip2rObj->dbHandler) != 1 ) {
-            return 0;
-        }
-
-        ip2rObj->firstIndexPtr = getUnsignedInt(buffer, 0);
-        ip2rObj->lastIndexPtr  = getUnsignedInt(buffer, 4);
-        ip2rObj->totalBlocks   = (ip2rObj->lastIndexPtr-ip2rObj->firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
-    }
-
-    //binary search the index blocks to define the data block
-    l = 0; h = ip2rObj->totalBlocks; dptr = 0;
-    while ( l <= h ) {
-        m = (l + h) >> 1;
-        p = ip2rObj->firstIndexPtr + m * INDEX_BLOCK_LENGTH;
-
-        fseek(ip2rObj->dbHandler, p, 0);
-        if ( fread(buffer, INDEX_BLOCK_LENGTH, 1, ip2rObj->dbHandler) != 1 ) {
-            return 0;
-        }
-
-        sip = getUnsignedInt(buffer, 0);
-        if ( ip < sip ) {
-            h = m - 1;
-        } else {
-            eip = getUnsignedInt(buffer, 4);
-            if ( ip > eip ) {
-                l = m + 1;
-            } else {
-                dptr = getUnsignedInt(buffer, 8);
-                break;
-            }
-        }
-    }
-
-    if ( dptr == 0 ) return 0;
-
-    //get the data
-    dataLen = ((dptr >> 24) & 0xFF);
-    dataptr = (dptr & 0x00FFFFFF);
-
-    //memset(data, 0x00, sizeof(data));
-    fseek(ip2rObj->dbHandler, dataptr, 0);
-    if ( fread(buffer, dataLen, 1, ip2rObj->dbHandler) != 1 ) {
-        return 0;
-    }
-
-    //fill the data to the datablock
-    datablock->city_id = getUnsignedInt(buffer, 0);
-    dataLen -= 4;    //reduce the length of the city_id
-    memcpy(datablock->region, buffer + 4, dataLen); 
-    datablock->region[dataLen] = '\0';
-
-    return 1;
-}
-
-IP2R_API uint_t ip2region_binary_search_string(ip2region_t ip2rObj, const char *ip, datablock_t datablock)
-{
-    return ip2region_binary_search(ip2rObj, ip2long(ip), datablock);
-}
-
-/**
- * get the region associated with the specifield ip address with b-tree algorithm
- *
- * @param   ip2rObj
- * @param   ip
- * @param   datablock
- * @return  uint_t
-*/
-IP2R_API uint_t ip2region_btree_search(ip2region_t ip2rObj, uint_t ip, datablock_t datablock)
-{
-    int i, idx;
-    int l, m, h, p, sptr, eptr, indexBlockLen, dataLen, dataptr;
-    uint_t sip, eip, idxptr, dptr;
-    char buffer[TOTAL_HEADER_LENGTH];
-
-    if ( ip2rObj->headerLen == 0 ) {
-        idx = 0;
-        fseek(ip2rObj->dbHandler, 8, 0);    //pass the super block
-        if ( fread(buffer, TOTAL_HEADER_LENGTH, 1, ip2rObj->dbHandler) != 1 ) {
-            return 0;
-        }
-
-        for ( i = 0; i < TOTAL_HEADER_LENGTH; i += 8 ) {
-            sip    = getUnsignedInt(buffer, i);
-            idxptr = getUnsignedInt(buffer, i + 4);
-            if ( idxptr == 0 ) break;
-
-            ip2rObj->HeaderSip[idx] = sip;
-            ip2rObj->HeaderPtr[idx] = idxptr;
-            idx++;
-        }
-
-        ip2rObj->headerLen = idx;
-    }
-
-    //search the header block to define the index block
-    l = 0; h = ip2rObj->headerLen; sptr = 0; eptr = 0;
-    while ( l <= h ) {
-        m = ((l + h) >> 1);
-
-        //perfetc matched, just return it
-        if ( ip == ip2rObj->HeaderSip[m] ) {
-            if ( m > 0 ) {
-                sptr = ip2rObj->HeaderPtr[m-1];
-                eptr = ip2rObj->HeaderPtr[m  ];
-            } else {
-                sptr = ip2rObj->HeaderPtr[m ];
-                eptr = ip2rObj->HeaderPtr[m+1];
-            }
-
-            break;
-        }
-
-        //less then the middle value
-        if ( ip < ip2rObj->HeaderSip[m] ) {
-            if ( m == 0 ) {
-                sptr = ip2rObj->HeaderPtr[m  ];
-                eptr = ip2rObj->HeaderPtr[m+1];
-                break;
-            } else if ( ip > ip2rObj->HeaderSip[m-1] ) {
-                sptr = ip2rObj->HeaderPtr[m-1];
-                eptr = ip2rObj->HeaderPtr[m  ];
-                break;
-            }
-            h = m - 1;
-        } else {
-            if ( m == ip2rObj->headerLen - 1 ) {
-                sptr = ip2rObj->HeaderPtr[m-1];
-                eptr = ip2rObj->HeaderPtr[m  ];
-                break;
-            } else if ( ip <= ip2rObj->HeaderSip[m+1] ) {
-                sptr = ip2rObj->HeaderPtr[m  ];
-                eptr = ip2rObj->HeaderPtr[m+1];
-                break;
-            }
-            l = m + 1;
-        }
-    }
-
-    //not matched just stop it
-    if ( sptr == 0 ) return 0;
-
-    indexBlockLen = eptr - sptr;
-    fseek(ip2rObj->dbHandler, sptr, 0);
-    if ( fread(buffer, indexBlockLen + INDEX_BLOCK_LENGTH, 1, ip2rObj->dbHandler) != 1 ) {
-        return 0;
-    }
-
-    dptr = 0; l = 0; h = indexBlockLen / INDEX_BLOCK_LENGTH;
-    while ( l <= h ) {
-        m = ((l + h) >> 1);
-        p = m * INDEX_BLOCK_LENGTH;
-        sip = getUnsignedInt(buffer, p);
-        if ( ip < sip ) {
-            h = m - 1;
-        } else {
-            eip = getUnsignedInt(buffer, p + 4);
-            if ( ip > eip ) {
-                l = m + 1;
-            } else {
-                dptr = getUnsignedInt(buffer, p + 8);
-                break;
-            }
-        }
-    }
-
-    if ( dptr == 0 ) return 0;
-
-    dataLen = ((dptr >> 24) & 0xFF);
-    dataptr = (dptr & 0x00FFFFFF);
-
-    fseek(ip2rObj->dbHandler, dataptr, 0);
-    if ( fread(buffer, dataLen, 1, ip2rObj->dbHandler) != 1 ) {
-        return 0;
-    }
-
-    datablock->city_id = getUnsignedInt(buffer, 0);
-    dataLen -= 4;
-    memcpy(datablock->region, buffer + 4, dataLen);
-    datablock->region[dataLen] = '\0';
-
-    return 1;
-}
-
-IP2R_API uint_t ip2region_btree_search_string(ip2region_t ip2rObj, const char *ip, datablock_t datablock)
-{
-    return ip2region_btree_search(ip2rObj, ip2long(ip), datablock);
-}
-
-/**
- * get a unsinged long(4bytes) from a specifield buffer start from the specifield offset
- *
- * @param   buffer
- * @param   offset
- * @return  uint_t
-*/
-IP2R_API uint_t getUnsignedInt(const char *buffer, int offset)
-{
-    return (
-        ((buffer[offset  ]) & 0x000000FF) | 
-        ((buffer[offset+1] <<  8) & 0x0000FF00) | 
-        ((buffer[offset+2] << 16) & 0x00FF0000) |
-        ((buffer[offset+3] << 24) & 0xFF000000)
-    );
-}
-
-/**
- * string ip to long
- *
- * @param   ip
- * @return  uint_t
-*/
-IP2R_API uint_t ip2long(const char *ip)
-{
-    int i = 0, p = 24;
-    char buffer[4];
-    const char *cs = ip;
-    uint_t ipval = 0;
-
-    while ( *cs != '\0' ) {
-        if ( *cs == ' ' ) {
-            cs++;
-            continue;
-        }
-
-       if ( i > 3 ) {
-            ipval = 0;
-            break;
-        }
-        if ( *cs == '.' ) {
-            //single part length limit
-
-            if ( p < 0 ) break;
-            buffer[i] = '\0';
-            ipval |= (atoi(buffer) << p);
-            p -= 8;
-            i = 0;
-        } else {
-            buffer[i++] = *cs;
-        }
-
-        cs++;
-    }
-
-    //append the rest parts
-    if ( i > 3 ) return 0;
-    buffer[i] = '\0';
-    ipval |= atoi(buffer);
-
-    return ipval;
-}
-
-/**
- * long to string ip
- *
- * @param   ip
- * @param   buffer
- * @return  uint_t(1 for success and 0 for failed)
-*/
-IP2R_API uint_t long2ip(uint_t ip, char *buffer)
-{
-    return 0;
-}
--- a/binding/c/ip2region.h
+++ b/binding/c/ip2region.h
@ -1,152 +0,0 @@
-/**
- * ip2region header file
- *
- * @author	chenxin<chenxin619315@gmail.com>
-*/
-
-#ifndef _IP2REGION_H
-#define _IP2REGION_H
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-//yat, just take it as this way, 99 percent and they works find
-#if ( defined(_WIN32) || defined(_WINDOWS_) || defined(__WINDOWS_) )
-#	define OS_WINDOW
-#else
-#	define OS_LINUX
-#endif
-
-#ifdef OS_WINDOW
-#	define IP2R_API extern __declspec(dllexport)
-#else
-/*platform shared library statement :: unix*/
-#	define IP2R_API extern
-#endif
-
-#define print(str) printf("%s", str)
-#define println(str) printf("%s\n", str)
-
-/*
- * memory allocation macro definition.
- * 		cause we should use emalloc,ecalloc .ege. in php.
- * so you could make it better apdat the php environment.
- */
-#define IP2R_CALLOC(_bytes, _blocks) calloc(_bytes, _blocks)
-#define IP2R_MALLOC(_bytes) malloc(_bytes)
-#define IP2R_FREE(_ptr) free(_ptr)
-
-typedef unsigned short ushort_t;
-typedef unsigned char uchar_t;
-typedef unsigned int uint_t;
-typedef unsigned long ulong_t;
-
-#define INDEX_BLOCK_LENGTH 12
-
-//thats 8 * 1024
-#define TOTAL_HEADER_LENGTH 8192
-
-/*
- * ip2region properties struct
-*/
-typedef struct {
-	uint_t *HeaderSip;		//header start ip blocks
-	uint_t *HeaderPtr;		//header ptr blocks
-	uint_t headerLen;		//header block number
-    char *dbFile;           //path of db file
-	FILE *dbHandler;		//file handler
-    char *dbBinStr;         //db binary string for memory search mode
-
-	uint_t firstIndexPtr;	//first index ptr
-	uint_t lastIndexPtr;	//last index ptr
-	uint_t totalBlocks;		//total index blocks number
-} ip2region_entry;
-typedef ip2region_entry * ip2region_t;
-
-/*
- * data block
-*/
-typedef struct {
-	uint_t city_id;
-	char region[256];
-} datablock_entry;
-typedef datablock_entry * datablock_t;
-
-
-/**
- * create a new ip2region object
- *
- * @param	ip2rObj
- * @param	dbFile path
-*/
-IP2R_API uint_t ip2region_create(ip2region_t, const char *);
-
-/**
- * destroy the specified ip2region object
- *
- * @param	ip2region_t
-*/
-IP2R_API uint_t ip2region_destroy(ip2region_t);
-
-/**
- * get the region associated with the specified ip address with the memory binary search algorithm
- *
- * @param   ip2region_t
- * @param   uint_t
- * @param   datablock_t
- * @date    2016/06/30
-*/
-IP2R_API uint_t ip2region_memory_search(ip2region_t, uint_t, datablock_t);
-IP2R_API uint_t ip2region_memory_search_string(ip2region_t, const char *, datablock_t);
-
-
-/**
- * get the region associated with the specified ip address with binary search algorithm
- *
- * @param	ip2rObj
- * @param	ip
- * @param	datablock
- * @return	uint_t
-*/
-IP2R_API uint_t ip2region_binary_search(ip2region_t, uint_t, datablock_t);
-IP2R_API uint_t ip2region_binary_search_string(ip2region_t, const char *, datablock_t);
-
-/**
- * get the region associated with the specified ip address with b-tree algorithm
- *
- * @param	ip2rObj
- * @param	ip
- * @param	datablock
- * @return	uint_t
-*/
-IP2R_API uint_t ip2region_btree_search(ip2region_t, uint_t, datablock_t);
-IP2R_API uint_t ip2region_btree_search_string(ip2region_t, const char *, datablock_t);
-
-/**
- * get a unsinged long(4bytes) from a specified buffer start from the specified offset
- *
- * @param	buffer
- * @param	offset
- * @return	uint_t
-*/
-IP2R_API uint_t getUnsignedInt(const char *, int);
-
-/**
- * string ip to long
- *
- * @param	ip
- * @return	uint_t
-*/
-IP2R_API uint_t ip2long(const char *);
-
-/**
- * long to string ip
- *
- * @param	ip
- * @param	buffer
- * @return	uint_t(1 for success and 0 for failed)
-*/
-IP2R_API uint_t long2ip(uint_t, char *);
-
-#endif	/*end ifndef*/
--- a/binding/c/testSearcher.c
+++ b/binding/c/testSearcher.c
@ -1,102 +0,0 @@
-/**
- * test ip2region searcher program
- *
- * @author  chenxin<chenxin619315@gmail.com>
- * @date    2015-10-30
-*/
-
-#include "ip2region.h"
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <sys/time.h>
-
-#define __PRINT_ABOUT__ \
-    println("+-------------------------------------+");    \
-    println("| ip2region test program              |");    \
-    println("| Author: chenxin619315@gmail.com.    |");    \
-    println("| Type 'quit' to exit the program.    |");    \
-    println("+-------------------------------------+");
-
-//read a line from a command line.
-static char *getLine( FILE *fp, char *__dst ) 
-{
-    register int c;
-    register char *cs;
-
-    cs = __dst;
-    while ( ( c = getc( fp ) ) != EOF ) {
-        if ( c == '\n' ) break;
-        *cs++ = c; 
-    }
-    *cs = '\0';
-
-    return ( c == EOF && cs == __dst ) ? NULL : __dst;
-}
-
-static double getTime()
-{
-    struct timeval tv;
-    struct timezone tz;
-    gettimeofday(&tv, &tz);
-
-    return (tv.tv_sec * 1000 + ((double)tv.tv_usec)/1000);
-}
-
-int main( int argc, char **argv )
-{
-    ip2region_entry ip2rEntry;
-    datablock_entry datablock;
-    char *dbFile = NULL, *algorithm = NULL;
-    char line[256];
-    uint_t (*func_ptr)(ip2region_t, const char *, datablock_t);
-    double s_time, c_time;
-    memset(&datablock, 0x00, sizeof(datablock_entry));
-
-    if ( argc < 2  ) {
-        printf("Usage: a.out [ip2region db file path] [algorithm]\n");
-        return 0;
-    }
-
-    dbFile      = argv[1];
-    algorithm = "B-tree";
-    func_ptr  = ip2region_btree_search_string;
-    if ( argc >= 3 ) {
-        if ( strcmp(argv[2], "binary") == 0 ) {
-            algorithm = "Binary";
-            func_ptr = ip2region_binary_search_string;
-        } else if ( strcmp(argv[2], "memory") == 0 ) {
-            algorithm = "Memory";
-            func_ptr = ip2region_memory_search_string;
-        }
-    }
-
-    //create a new ip2rObj
-    printf("+--initializing %s ... \n", algorithm);
-    if ( ip2region_create(&ip2rEntry, dbFile) == 0 ) {
-        println("Error: Fail to create the ip2region object\n");
-        return 0;
-    }
-
-    __PRINT_ABOUT__;
-
-    while ( 1 ) {
-        print("ip2region>> ");
-        getLine( stdin, line );
-        if ( strlen(line) < 2 ) continue;
-        if ( strcasecmp( line, "quit" ) == 0 ) {
-            println("+--Bye!");
-            break;
-        }
-
-        s_time = getTime();
-        func_ptr(&ip2rEntry, line, &datablock);
-        c_time = getTime() - s_time;
-        printf("%d|%s in %.5f millseconds\n", datablock.city_id, datablock.region, c_time);
-    }
-
-    // destory the ip2rObj
-    ip2region_destroy(&ip2rEntry);
-
-    return 0;
-}
--- a/binding/c_mmap/ip2region.c
+++ b/binding/c_mmap/ip2region.c
@ -1,328 +0,0 @@
-/**
- * ip2region implementation with mmap support created by Leo Ma
- *
- * @see     #ip2region.h
- * @author  chenxin<chenxin619315@gmail.com>
- * @author  Leo Ma<http://git.oschina.net/begeekmyfriend>
- * @date    2017/01/12
-*/
-
-#include "ip2region.h"
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-
-/**
- * create a new ip2region object
- *
- * @param   dbFile path
-*/
-IP2R_API uint_t ip2region_create(ip2region_t ip2rObj, char *dbFile)
-{
-    struct stat st;
-
-    memset(ip2rObj, 0x00, sizeof(ip2region_entry));
-    ip2rObj->dbFile = IP2R_MALLOC(1024);
-    strcpy(ip2rObj->dbFile, dbFile);
-
-    int fd = open(dbFile, O_RDONLY);
-    if ( fd < 0 ) {
-        //fprintf(stderr, "Fail to open the db file %s\n", ip2rObj->dbFile);
-        return 0;
-    }
-
-    if ( fstat(fd, &st) < 0 ) {
-        //fprintf(stderr, "Fail to stat the db file %s\n", ip2rObj->dbFile);
-        return 0;
-    }
-
-    ip2rObj->dbSize = st.st_size;
-    ip2rObj->dbBinStr = mmap(NULL, ip2rObj->dbSize, PROT_READ, MAP_PRIVATE, fd, 0);
-    if ( ip2rObj->dbBinStr == (void *) -1 ) {
-        //fprintf(stderr, "Fail to map the db file %s\n", ip2rObj->dbFile);
-        return 0;
-    }
-
-    // Close db file as soon as possible.
-    close(fd);
-
-    ip2rObj->headerLen = 0;
-    ip2rObj->HeaderSip = (uint_t *) IP2R_MALLOC(TOTAL_HEADER_LENGTH);
-    if ( ip2rObj->HeaderSip == NULL ) {
-        return 0;
-    }
-
-    ip2rObj->HeaderPtr = (uint_t *) IP2R_MALLOC(TOTAL_HEADER_LENGTH);
-    if ( ip2rObj->HeaderPtr == NULL ) {
-        IP2R_FREE(ip2rObj->HeaderSip);
-        return 0;
-    }
-
-    ip2rObj->firstIndexPtr = getUnsignedInt(ip2rObj->dbBinStr, 0);
-    ip2rObj->lastIndexPtr  = getUnsignedInt(ip2rObj->dbBinStr, 4);
-    ip2rObj->totalBlocks   = (ip2rObj->lastIndexPtr-ip2rObj->firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
-
-    return 1;
-}
-
-/**
- * destroy the specifield ip2region object
- *
- * @param    ip2region_t
-*/
-IP2R_API uint_t ip2region_destroy(ip2region_t ip2rObj)
-{
-    IP2R_FREE(ip2rObj->dbFile);
-    IP2R_FREE(ip2rObj->HeaderSip);
-    IP2R_FREE(ip2rObj->HeaderPtr);
-
-    //free the db binary string
-    if ( ip2rObj->dbBinStr != NULL ) {
-        munmap(ip2rObj->dbBinStr, ip2rObj->dbSize);
-    }
-
-    memset(ip2rObj, 0x00, sizeof(ip2region_entry));
-
-    return 1;
-}
-
-/**
- * get the region associated with the specified ip address with the memory binary search algorithm
- *
- * @param   ip2rObj
- * @param   ip
- * @param   datablock
-*/
-IP2R_API uint_t ip2region_binary_search(ip2region_t ip2rObj, uint_t ip, datablock_t datablock) 
-{
-    int l, h, m, p;
-    uint_t sip, eip, dptr;
-    int dataLen, dataptr;
-    char *buffer;
-
-    l = 0; h = ip2rObj->totalBlocks; dptr = 0;
-    while ( l <= h ) {
-        m = (l + h) >> 1;
-        p = ip2rObj->firstIndexPtr + m * INDEX_BLOCK_LENGTH;
-
-        buffer = ip2rObj->dbBinStr + p;
-        sip    = getUnsignedInt(buffer, 0);
-        if ( ip < sip ) {
-            h = m - 1;
-        } else {
-            eip = getUnsignedInt(buffer, 4);
-            if ( ip > eip ) {
-                l = m + 1;
-            } else {
-                dptr = getUnsignedInt(buffer, 8);
-                break;
-            }
-        }
-    }
-
-    if ( dptr == 0 ) return 0;
-
-    //get the data
-    dataLen = ((dptr >> 24) & 0xFF);
-    dataptr = (dptr & 0x00FFFFFF);
-    buffer  = ip2rObj->dbBinStr + dataptr;
-
-    //fill the data to the datablock
-    datablock->city_id = getUnsignedInt(buffer, 0);
-    dataLen -= 4;    //reduce the length of the city_id
-    memcpy(datablock->region, buffer + 4, dataLen); 
-    datablock->region[dataLen] = '\0';
-
-    return 1;
-}
-
-IP2R_API uint_t ip2region_binary_search_string(ip2region_t ip2rObj, char *ip, datablock_t datablock)
-{
-    return ip2region_binary_search(ip2rObj, ip2long(ip), datablock);
-}
-
-/**
- * get the region associated with the specifield ip address with b-tree algorithm
- *
- * @param    ip2rObj
- * @param    ip
- * @param    datablock
- * @return    uint_t
-*/
-IP2R_API uint_t ip2region_btree_search(ip2region_t ip2rObj, uint_t ip, datablock_t datablock)
-{
-    int i, j;
-    int l, m, h, p, sptr, eptr, indexBlockLen, dataLen, dataptr;
-    uint_t sip, eip, idxptr, dptr;
-    char *buffer;
-
-    if ( ip2rObj->headerLen == 0 ) {
-        buffer = ip2rObj->dbBinStr + 8;
-        for ( i = j = 0; i < TOTAL_HEADER_LENGTH; i += 8, j++ ) {
-            sip    = getUnsignedInt(buffer, i);
-            idxptr = getUnsignedInt(buffer, i + 4);
-            if ( idxptr == 0 ) break;
-
-            ip2rObj->HeaderSip[j] = sip;
-            ip2rObj->HeaderPtr[j] = idxptr;
-        }
-
-        ip2rObj->headerLen = j;
-    }
-
-    //search the header block to define the index block
-    l = 0; h = ip2rObj->headerLen; sptr = 0; eptr = 0;
-    while ( l <= h ) {
-        m = ((l + h) >> 1);
-
-        //perfetc matched, just return it
-        if ( ip == ip2rObj->HeaderSip[m] ) {
-            if ( m > 0 ) {
-                sptr = ip2rObj->HeaderPtr[m-1];
-                eptr = ip2rObj->HeaderPtr[m  ];
-            } else {
-                sptr = ip2rObj->HeaderPtr[m ];
-                eptr = ip2rObj->HeaderPtr[m+1];
-            }
-
-            break;
-        }
-
-        //less then the middle value
-        if ( ip < ip2rObj->HeaderSip[m] ) {
-            if ( m == 0 ) {
-                sptr = ip2rObj->HeaderPtr[m  ];
-                eptr = ip2rObj->HeaderPtr[m+1];
-                break;
-            } else if ( ip > ip2rObj->HeaderSip[m-1] ) {
-                sptr = ip2rObj->HeaderPtr[m-1];
-                eptr = ip2rObj->HeaderPtr[m  ];
-                break;
-            }
-            h = m - 1;
-        } else {
-            if ( m == ip2rObj->headerLen - 1 ) {
-                sptr = ip2rObj->HeaderPtr[m-1];
-                eptr = ip2rObj->HeaderPtr[m  ];
-                break;
-            } else if ( ip <= ip2rObj->HeaderSip[m+1] ) {
-                sptr = ip2rObj->HeaderPtr[m  ];
-                eptr = ip2rObj->HeaderPtr[m+1];
-                break;
-            }
-            l = m + 1;
-        }
-    }
-
-    //not matched just stop it
-    if ( sptr == 0 ) return 0;
-
-    indexBlockLen = eptr - sptr;
-    buffer = ip2rObj->dbBinStr + sptr;
-
-    dptr = 0; l = 0; h = indexBlockLen / INDEX_BLOCK_LENGTH;
-    while ( l <= h ) {
-        m = ((l + h) >> 1);
-        p = m * INDEX_BLOCK_LENGTH;
-        sip = getUnsignedInt(buffer, p);
-        if ( ip < sip ) {
-            h = m - 1;
-        } else {
-            eip = getUnsignedInt(buffer, p + 4);
-            if ( ip > eip ) {
-                l = m + 1;
-            } else {
-                dptr = getUnsignedInt(buffer, p + 8);
-                break;
-            }
-        }
-    }
-
-    if ( dptr == 0 ) return 0;
-
-    dataLen = ((dptr >> 24) & 0xFF);
-    dataptr = (dptr & 0x00FFFFFF);
-    buffer = ip2rObj->dbBinStr + dataptr;
-
-    datablock->city_id = getUnsignedInt(buffer, 0);
-    dataLen -= 4;
-    memcpy(datablock->region, buffer + 4, dataLen);
-    datablock->region[dataLen] = '\0';
-
-    return 1;
-}
-
-IP2R_API uint_t ip2region_btree_search_string(ip2region_t ip2rObj, char *ip, datablock_t datablock)
-{
-    return ip2region_btree_search(ip2rObj, ip2long(ip), datablock);
-}
-
-/**
- * get a unsinged long(4bytes) from a specifield buffer start from the specifield offset
- *
- * @param    buffer
- * @param    offset
- * @return    uint_t
-*/
-IP2R_API uint_t getUnsignedInt(char *buffer, int offset)
-{
-    return (
-        ((buffer[offset  ]) & 0x000000FF) | 
-        ((buffer[offset+1] <<  8) & 0x0000FF00) | 
-        ((buffer[offset+2] << 16) & 0x00FF0000) |
-        ((buffer[offset+3] << 24) & 0xFF000000)
-    );
-}
-
-/**
- * string ip to long
- *
- * @param    ip
- * @return    uint_t
-*/
-IP2R_API uint_t ip2long(char *ip)
-{
-    int i = 0, p = 24;
-    char buffer[4], *cs = ip;
-    uint_t ipval = 0;
-
-    while ( *cs != '\0' ) {
-        if ( *cs == '.' ) {
-            //single part length limit
-            if ( i > 3 ) {
-                ipval = 0;
-                break;
-            }
-
-            if ( p < 0 ) break;
-            buffer[i] = '\0';
-            ipval |= (atoi(buffer) << p);
-            p -= 8;
-            i = 0;
-        } else {
-            buffer[i++] = *cs;
-        }
-
-        cs++;
-    }
-
-    //append the rest parts
-    if ( i > 3 ) return 0;
-    buffer[i] = '\0';
-    ipval |= atoi(buffer);
-
-    return ipval;
-}
-
-/**
- * long to string ip
- *
- * @param    ip
- * @param    buffer
- * @return    uint_t(1 for success and 0 for failed)
-*/
-IP2R_API uint_t long2ip(uint_t ip, char *buffer)
-{
-    return 0;
-}
--- a/binding/c_mmap/ip2region.h
+++ b/binding/c_mmap/ip2region.h
@ -1,138 +0,0 @@
-/**
- * ip2region header file
- *
- * @author	chenxin<chenxin619315@gmail.com>
- * @author  Leo Ma<http://git.oschina.net/begeekmyfriend>
-*/
-
-#ifndef _IP2REGION_H
-#define _IP2REGION_H
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-//yat, just take it as this way, 99 percent and they works find
-#if ( defined(_WIN32) || defined(_WINDOWS_) || defined(__WINDOWS_) )
-#	define OS_WINDOW
-#else
-#	define OS_LINUX
-#endif
-
-#ifdef OS_WINDOW
-#	define IP2R_API extern __declspec(dllexport)
-#else
-/*platform shared library statement :: unix*/
-#	define IP2R_API extern
-#endif
-
-#define print(str) printf("%s", str)
-#define println(str) printf("%s\n", str)
-
-/*
- * memory allocation macro definition.
- * 		cause we should use emalloc,ecalloc .ege. in php.
- * so you could make it better apdat the php environment.
- */
-#define IP2R_CALLOC(_bytes, _blocks) calloc(_bytes, _blocks)
-#define IP2R_MALLOC(_bytes) malloc(_bytes)
-#define IP2R_FREE(_ptr) free(_ptr)
-
-typedef unsigned short ushort_t;
-typedef unsigned char uchar_t;
-typedef unsigned int uint_t;
-typedef unsigned long ulong_t;
-
-#define INDEX_BLOCK_LENGTH 12
-#define TOTAL_HEADER_LENGTH 8192
-
-/*
- * ip2region properties struct
-*/
-typedef struct {
-	uint_t *HeaderSip;		//header start ip blocks
-	uint_t *HeaderPtr;		//header ptr blocks
-	uint_t headerLen;		//header block number
-    char *dbFile;           //path of db file
-    char *dbBinStr;         //db binary string for memory search mode
-    uint_t dbSize;
-	uint_t firstIndexPtr;	//first index ptr
-	uint_t lastIndexPtr;	//last index ptr
-	uint_t totalBlocks;		//total index blocks number
-} ip2region_entry;
-typedef ip2region_entry * ip2region_t;
-
-/*
- * data block
-*/
-typedef struct {
-	uint_t city_id;
-	char region[256];
-} datablock_entry;
-typedef datablock_entry * datablock_t;
-
-
-/**
- * create a new ip2region object
- *
- * @param	ip2rObj
- * @param	dbFile path
-*/
-IP2R_API uint_t ip2region_create(ip2region_t, char *);
-
-/**
- * destroy the specified ip2region object
- *
- * @param	ip2region_t
-*/
-IP2R_API uint_t ip2region_destroy(ip2region_t);
-
-/**
- * get the region associated with the specified ip address with memory binary search algorithm
- *
- * @param   ip2region_t
- * @param   uint_t
- * @param   datablock_t
- * @date    2016/06/30
-*/
-IP2R_API uint_t ip2region_binary_search(ip2region_t, uint_t, datablock_t);
-IP2R_API uint_t ip2region_binary_search_string(ip2region_t, char *, datablock_t);
-
-/**
- * get the region associated with the specified ip address with b-tree algorithm
- *
- * @param	ip2rObj
- * @param	ip
- * @param	datablock
- * @return	uint_t
-*/
-IP2R_API uint_t ip2region_btree_search(ip2region_t, uint_t, datablock_t);
-IP2R_API uint_t ip2region_btree_search_string(ip2region_t, char *, datablock_t);
-
-/**
- * get a unsinged long(4bytes) from a specified buffer start from the specified offset
- *
- * @param	buffer
- * @param	offset
- * @return	uint_t
-*/
-IP2R_API uint_t getUnsignedInt(char *, int);
-
-/**
- * string ip to long
- *
- * @param	ip
- * @return	uint_t
-*/
-IP2R_API uint_t ip2long(char *);
-
-/**
- * long to string ip
- *
- * @param	ip
- * @param	buffer
- * @return	uint_t(1 for success and 0 for failed)
-*/
-IP2R_API uint_t long2ip(uint_t, char *);
-
-#endif	/*end ifndef*/
--- a/binding/c_mmap/testSearcher.c
+++ b/binding/c_mmap/testSearcher.c
@ -1,99 +0,0 @@
-/**
- * test ip2region searcher program
- *
- * @author  chenxin<chenxin619315@gmail.com>
- * @date    2015-10-30
-*/
-
-#include "ip2region.h"
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <sys/time.h>
-
-#define __PRINT_ABOUT__ \
-    println("+-------------------------------------+");    \
-    println("| ip2region test program              |");    \
-    println("| Author: chenxin619315@gmail.com.    |");    \
-    println("| Type 'quit' to exit the program.    |");    \
-    println("+-------------------------------------+");
-
-//read a line from a command line.
-static char *getLine( FILE *fp, char *__dst ) 
-{
-    register int c;
-    register char *cs;
-
-    cs = __dst;
-    while ( ( c = getc( fp ) ) != EOF ) {
-        if ( c == '\n' ) break;
-        *cs++ = c; 
-    }
-    *cs = '\0';
-
-    return ( c == EOF && cs == __dst ) ? NULL : __dst;
-}
-
-static double getTime()
-{
-    struct timeval tv;
-    struct timezone tz;
-    gettimeofday(&tv, &tz);
-
-    return (tv.tv_sec * 1000 + ((double)tv.tv_usec)/1000);
-}
-
-int main( int argc, char **argv )
-{
-    ip2region_entry ip2rEntry;
-    datablock_entry datablock;
-    char *dbFile = NULL, *algorithm = NULL;
-    char line[256];
-    uint_t (*func_ptr)(ip2region_t, char *, datablock_t);
-    double s_time, c_time;
-    memset(&datablock, 0x00, sizeof(datablock_entry));
-
-    if ( argc < 2  ) {
-        printf("Usage: a.out [ip2region db file path] [algorithm]\n");
-        return 0;
-    }
-
-    dbFile    = argv[1];
-    algorithm = "B-tree";
-    func_ptr  = ip2region_btree_search_string;
-    if ( argc >= 3 ) {
-        if ( strcmp(argv[2], "binary") == 0 ) {
-            algorithm = "File";
-            func_ptr = ip2region_binary_search_string;
-        }
-    }
-
-    //create a new ip2rObj
-    printf("+--initializing %s ... \n", algorithm);
-    if ( ip2region_create(&ip2rEntry, dbFile) == 0 ) {
-        println("Error: Fail to create the ip2region object\n");
-        return 0;
-    }
-
-    __PRINT_ABOUT__;
-
-    while ( 1 ) {
-        print("ip2region>> ");
-        getLine( stdin, line );
-        if ( strlen(line) < 2 ) continue;
-        if ( strcasecmp( line, "quit" ) == 0 ) {
-            println("+--Bye!");
-            break;
-        }
-
-        s_time = getTime();
-        func_ptr(&ip2rEntry, line, &datablock);
-        c_time = getTime() - s_time;
-        printf("%d|%s in %.5f millseconds\n", datablock.city_id, datablock.region, c_time);
-    }
-
-    //destory the ip2rObj
-    ip2region_destroy(&ip2rEntry);
-
-    return 0;
-}
--- a/binding/golang/README.md
+++ b/binding/golang/README.md
@ -1,89 +0,0 @@
-### golang 实现ip地址查询
-
-#### 获取
-
-```
-go get github.com/lionsoul2014/ip2region/binding/golang
-```
-
-
-
-
-#### 使用
-
-```golang
-
-package main
-
-import (
-	"fmt"
-	"github.com/lionsoul2014/ip2region/binding/golang/ip2region"
-)
-
-func main() {
-	fmt.Println("err")
-	region, err := ip2region.New("ip2region.db")
-	defer region.Close()
-	if err != nil {
-		fmt.Println(err)
-		return
-	}
-	ip, err := region.MemorySearch("127.0.0.1")
-	fmt.Println(ip, err)
-	ip, err = region.BinarySearch("127.0.0.1")
-	fmt.Println(ip, err)
-	ip, err = region.BtreeSearch("127.0.0.1")
-	fmt.Println(ip, err)
-}
-
-```
-
-#### 返回对象
-```golang
-type IpInfo struct {
-	CityId   int64
-	Country  string
-	Region   string
-	Province string
-	City     string
-	ISP      string
-}
-```
-
-#### 性能
-
-|名称|次数|平均耗时|
-|---|---|------|
-BenchmarkBtreeSearch-4|    200000 |             7715 ns/op
-BenchmarkMemorySearch-4|  2000000  |             840 ns/op
-BenchmarkBinarySearch-4|    30000   |          42680 ns/op
-
-
-#### 测试程序
-
-```
-cd /binging/golang
-
-go run main.go ../../data/ip2region.db
-
-Or
-
-go build -o ip2region main.go
-./ip2region ../../data/ip2region.db
-
-```
-
-会看到如下界面
-
-```
-initializing
-+-------------------------------------------------------+
-| ip2region test script                                 |
-| format 'ip type'                                      |
-| type option 'b-tree','binary','memory' default b-tree |
-| Type 'quit' to exit program                           |
-+-------------------------------------------------------+
-ip2reginon >> 127.0.0.1 memory
-0|未分配或者内网IP|0|0|0|0  960.5µs
-
-```
--- a/binding/golang/ip2region/ip2Region.go
+++ b/binding/golang/ip2region/ip2Region.go
@ -1,349 +0,0 @@
-package ip2region
-
-import (
-	"os"
-	"strings"
-	"strconv"
-	"io/ioutil"
-	"errors"
-)
-
-const (
-	INDEX_BLOCK_LENGTH  = 12
-	TOTAL_HEADER_LENGTH = 8192
-)
-
-var err error
-var ipInfo IpInfo
-
-type Ip2Region struct {
-	// db file handler
-	dbFileHandler *os.File
-
-
-	//header block info
-
-	headerSip     []int64
-	headerPtr     []int64
-	headerLen     int64
-
-	// super block index info
-	firstIndexPtr int64
-	lastIndexPtr  int64
-	totalBlocks   int64
-
-	// for memory mode only
-	// the original db binary string
-
-	dbBinStr      []byte
-	dbFile        string
-}
-
-type IpInfo struct {
-	CityId   int64
-	Country  string
-	Region   string
-	Province string
-	City     string
-	ISP      string
-}
-
-func (ip IpInfo)String() string {
-	return strconv.FormatInt(ip.CityId, 10) + "|" + ip.Country + "|" + ip.Region + "|" + ip.Province + "|" + ip.City + "|" + ip.ISP
-}
-
-func getIpInfo(cityId int64, line []byte) IpInfo {
-
-	lineSlice := strings.Split(string(line), "|")
-	ipInfo := IpInfo{}
-	length := len(lineSlice)
-	ipInfo.CityId = cityId
-	if length < 5 {
-		for i := 0; i <= 5 - length; i++ {
-			lineSlice = append(lineSlice, "")
-		}
-	}
-
-	ipInfo.Country = lineSlice[0]
-	ipInfo.Region = lineSlice[1]
-	ipInfo.Province = lineSlice[2]
-	ipInfo.City = lineSlice[3]
-	ipInfo.ISP = lineSlice[4]
-	return ipInfo
-}
-
-func New(path string) (*Ip2Region, error) {
-
-	file, err := os.Open(path)
-	if err != nil {
-		return nil, err
-	}
-
-	return &Ip2Region{
-		dbFile:path,
-		dbFileHandler:file,
-	}, nil
-}
-
-func (this *Ip2Region) Close() {
-	this.dbFileHandler.Close()
-}
-
-func (this *Ip2Region) MemorySearch(ipStr string) (ipInfo IpInfo, err error) {
-	ipInfo = IpInfo{}
-
-	if this.totalBlocks == 0 {
-		this.dbBinStr, err = ioutil.ReadFile(this.dbFile)
-
-		if err != nil {
-
-			return ipInfo, err
-		}
-
-		this.firstIndexPtr = getLong(this.dbBinStr, 0)
-		this.lastIndexPtr = getLong(this.dbBinStr, 4)
-		this.totalBlocks = (this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH + 1
-	}
-
-	ip, err := ip2long(ipStr)
-	if err != nil {
-		return ipInfo, err
-	}
-
-	h := this.totalBlocks
-	var dataPtr, l int64;
-	for (l <= h) {
-
-		m := (l + h) >> 1
-		p := this.firstIndexPtr + m * INDEX_BLOCK_LENGTH
-		sip := getLong(this.dbBinStr, p)
-		if ip < sip {
-			h = m - 1
-		} else {
-			eip := getLong(this.dbBinStr, p + 4)
-			if ip > eip {
-				l = m + 1
-			} else {
-				dataPtr = getLong(this.dbBinStr, p + 8)
-				break;
-			}
-		}
-	}
-	if dataPtr == 0 {
-		return ipInfo, errors.New("not found")
-	}
-
-	dataLen := ((dataPtr >> 24) & 0xFF)
-	dataPtr = (dataPtr & 0x00FFFFFF);
-	ipInfo = getIpInfo(getLong(this.dbBinStr, dataPtr), this.dbBinStr[(dataPtr) + 4:dataPtr + dataLen])
-	return ipInfo, nil
-
-}
-
-func (this *Ip2Region)BinarySearch(ipStr string) (ipInfo IpInfo, err error) {
-	ipInfo = IpInfo{}
-	if this.totalBlocks == 0 {
-		this.dbFileHandler.Seek(0, 0)
-		superBlock := make([]byte, 8)
-		this.dbFileHandler.Read(superBlock)
-		this.firstIndexPtr = getLong(superBlock, 0)
-		this.lastIndexPtr = getLong(superBlock, 4)
-		this.totalBlocks = (this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH + 1
-	}
-
-	var l, dataPtr, p int64
-
-	h := this.totalBlocks
-
-	ip, err := ip2long(ipStr)
-
-	if err != nil {
-		return
-	}
-
-	for (l <= h) {
-		m := (l + h) >> 1
-
-		p = m * INDEX_BLOCK_LENGTH
-
-		_, err = this.dbFileHandler.Seek(this.firstIndexPtr + p, 0)
-		if err != nil {
-			return
-		}
-
-		buffer := make([]byte, INDEX_BLOCK_LENGTH)
-		_, err = this.dbFileHandler.Read(buffer)
-
-		if err != nil {
-
-		}
-		sip := getLong(buffer, 0)
-		if ip < sip {
-			h = m - 1
-		} else {
-			eip := getLong(buffer, 4)
-			if ip > eip {
-				l = m + 1
-			} else {
-				dataPtr = getLong(buffer, 8)
-				break;
-			}
-		}
-
-	}
-
-	if dataPtr == 0 {
-		err = errors.New("not found")
-		return
-	}
-
-	dataLen := ((dataPtr >> 24) & 0xFF)
-	dataPtr = (dataPtr & 0x00FFFFFF);
-
-	this.dbFileHandler.Seek(dataPtr, 0)
-	data := make([]byte, dataLen)
-	this.dbFileHandler.Read(data)
-	ipInfo = getIpInfo(getLong(data, 0), data[4:dataLen])
-	err = nil
-	return
-}
-
-func (this *Ip2Region) BtreeSearch(ipStr string) (ipInfo IpInfo, err error) {
-	ipInfo = IpInfo{}
-	ip, err := ip2long(ipStr)
-
-	if this.headerLen == 0 {
-		this.dbFileHandler.Seek(8, 0)
-
-		buffer := make([]byte, TOTAL_HEADER_LENGTH)
-		this.dbFileHandler.Read(buffer)
-		var idx int64;
-		for i := 0; i < TOTAL_HEADER_LENGTH; i += 8 {
-			startIp := getLong(buffer, int64(i))
-			dataPar := getLong(buffer, int64(i + 4))
-			if dataPar == 0 {
-				break
-			}
-
-			this.headerSip = append(this.headerSip, startIp)
-			this.headerPtr = append(this.headerPtr, dataPar)
-			idx ++;
-		}
-
-		this.headerLen = idx
-	}
-
-	var l, sptr, eptr int64
-	h := this.headerLen
-
-	for l <= h {
-		m := int64(l + h) >> 1
-		if m < this.headerLen {
-			if ip == this.headerSip[m] {
-				if m > 0 {
-					sptr = this.headerPtr[m - 1]
-					eptr = this.headerPtr[m]
-				} else {
-					sptr = this.headerPtr[m]
-					eptr = this.headerPtr[m + 1]
-				}
-				break
-			}
-			if ip < this.headerSip[m] {
-				if m == 0 {
-					sptr = this.headerPtr[m]
-					eptr = this.headerPtr[m + 1]
-					break
-				} else if ip > this.headerSip[m - 1] {
-					sptr = this.headerPtr[m - 1]
-					eptr = this.headerPtr[m]
-					break
-				}
-				h = m - 1
-			} else {
-				if m == this.headerLen - 1 {
-					sptr = this.headerPtr[m - 1]
-					eptr = this.headerPtr[m]
-					break
-				} else if ip <= this.headerSip[m + 1] {
-					sptr = this.headerPtr[m ]
-					eptr = this.headerPtr[m + 1]
-					break
-				}
-				l = m + 1
-			}
-		}
-
-	}
-
-	if sptr == 0 {
-		err = errors.New("not found")
-		return
-	}
-
-	blockLen := eptr - sptr
-	this.dbFileHandler.Seek(sptr, 0)
-	index := make([]byte, blockLen + INDEX_BLOCK_LENGTH)
-	this.dbFileHandler.Read(index)
-	var dataptr int64
-	h = blockLen / INDEX_BLOCK_LENGTH
-	l = 0
-
-	for l <= h {
-		m := int64(l + h) >> 1
-		p := m * INDEX_BLOCK_LENGTH
-		sip := getLong(index, p)
-		if ip < sip {
-			h = m - 1;
-		} else {
-			eip := getLong(index, p + 4)
-			if ip > eip {
-				l = m + 1
-			} else {
-				dataptr = getLong(index, p + 8)
-				break
-			}
-		}
-	}
-
-	if dataptr == 0 {
-		err = errors.New("not found")
-		return
-	}
-
-	dataLen := (dataptr >> 24) & 0xFF
-	dataPtr := dataptr & 0x00FFFFFF
-
-	this.dbFileHandler.Seek(dataPtr, 0)
-	data := make([]byte, dataLen)
-	this.dbFileHandler.Read(data)
-	ipInfo = getIpInfo(getLong(data, 0), data[4:])
-	return
-}
-
-func getLong(b []byte, offset int64) int64 {
-
-	val := (int64(b[offset ]) |
-		int64(b[offset + 1]) << 8 |
-		int64(b[offset + 2]) << 16 |
-		int64(b[offset + 3]) << 24)
-
-	return val
-
-}
-
-func ip2long(IpStr string) (int64, error) {
-	bits := strings.Split(IpStr, ".")
-	if len(bits) != 4 {
-		return 0, errors.New("ip format error")
-	}
-
-	var sum int64
-	for i, n := range bits {
-		bit, _ := strconv.ParseInt(n, 10, 64)
-		sum += bit << uint(24 - 8 * i)
-	}
-
-	return sum, nil
-}
-
--- a/binding/golang/ip2region/ip2Region_test.go
+++ b/binding/golang/ip2region/ip2Region_test.go
@ -1,49 +0,0 @@
-package ip2region
-
-import (
-	"testing"
-)
-
-func BenchmarkBtreeSearch(B *testing.B) {
-	region, err := New("../../data/ip2region.db ")
-	if err != nil {
-		B.Error(err)
-	}
-	for i:=0;i<B.N;i++{
-		region.BtreeSearch("127.0.0.1")
-	}
-
-}
-
-func BenchmarkMemorySearch(B *testing.B) {
-	region, err := New("../../data/ip2region.db ")
-	if err != nil {
-		B.Error(err)
-	}
-	for i:=0;i<B.N;i++{
-		region.MemorySearch("127.0.0.1")
-	}
-
-}
-
-func BenchmarkBinarySearch(B *testing.B) {
-	region, err := New("../../data/ip2region.db ")
-	if err != nil {
-		B.Error(err)
-	}
-	for i:=0;i<B.N;i++{
-		region.BinarySearch("127.0.0.1")
-	}
-
-}
-
-func TestIp2long(t *testing.T) {
-	ip, err := ip2long("127.0.0.1")
-	if err != nil {
-		t.Error(err)
-	}
-	if ip != 2130706433 {
-		t.Error("result error")
-	}
-	t.Log(ip)
-}
--- a/binding/golang/main.go
+++ b/binding/golang/main.go
@ -1,70 +0,0 @@
-package main
-
-import (
-	"os"
-	"github.com/lionsoul2014/ip2region/binding/golang/ip2region"
-	"bufio"
-	"fmt"
-	"strings"
-	"errors"
-	"time"
-
-)
-
-func main() {
-
-	db := os.Args[1]
-
-	_,err:= os.Stat(db)
-	if os.IsNotExist(err){
-		panic("not found db " + db)
-	}
-
-	region, err := ip2region.New(db)
-	defer region.Close()
-	fmt.Println(`initializing
-+-------------------------------------------------------+
-| ip2region test script                                 |
-| format 'ip type'                                      |
-| type option 'b-tree','binary','memory' default b-tree |
-| Type 'quit' to exit program                           |
-+-------------------------------------------------------+`)
-
-	reader := bufio.NewReader(os.Stdin)
-	for {
-		fmt.Print("ip2reginon >> ")
-		data, _, _ := reader.ReadLine()
-		begin:= time.Now()
-		commands := strings.Fields(string(data))
-		ip := ip2region.IpInfo{}
-		len := len(commands)
-		if len == 0{
-			continue
-		}
-
-		if commands[0] == "quit"{
-			break
-		}
-
-		if !(len > 1) {
-			commands = append(commands, "b-tree")
-		}
-		switch commands[1] {
-		case "b-tree":
-			ip, err = region.BtreeSearch(commands[0])
-		case "binary":
-			ip, err = region.BinarySearch(commands[0])
-		case "memory":
-			ip, err = region.MemorySearch(commands[0])
-		default:
-			err = errors.New("parameter error")
-		}
-
-		if err != nil {
-
-			fmt.Println( fmt.Sprintf("\x1b[0;31m%s\x1b[0m",err.Error()))
-		}else{
-			fmt.Println( fmt.Sprintf("\x1b[0;32m%s  %s\x1b[0m",ip.String(),time.Since(begin).String()))
-		}
-	}
-}
--- a/binding/java/build.xml
+++ b/binding/java/build.xml
@ -1,72 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project name="ip2region" default="usage" basedir=".">
-	<!--Initialize-->
-	<target name="init">
-		<echo message="------------------------------------------------------------"/>
-		<echo message="----------BUILDING JCSEG PACKAGE----------------------------"/>
-		<echo message=""/>
-		<property name="bottom" value="ip2region 2015"/>
-		<property name="jars" value="${basedir}"/>
-		<property name="sources" value="${basedir}/src"/>
-		<property name="classes" value="${basedir}/classes"/>
-		<property name="version" value="1.4"/>
-		<property name="api" value="${basedir}/doc"/>
-		<mkdir dir="${classes}"/>
-		<mkdir dir="${api}"/>
-	</target>
-	
-	<path id="classpath">
-		<fileset dir="${lib.dir}" includes="**/*.jar"/>
-	</path>
-	
-	<!--Build-->
-	<target name="build" depends="init">
-		<echo message="-------------Compiling Application--------------"/>
-		<javac srcdir="${sources}" destdir="${classes}"></javac>
-	</target>
-	
-	<!--Archive-->
-	<target name="dist" depends="build">
-		<jar jarfile="${jars}/ip2region-${version}.jar" basedir="${classes}">
-			<!--class fileter-->
-			<include name="**/*"/>
-			<!--manifest information setting-->
-			<manifest>
-				<attribute name="Main-Class" value="org.lionsoul.ip2region.test.TestSearcher"/>
-				<attribute name="Class-Path" value=""/>
-			</manifest>
-		</jar>
-	</target>
-	
-	<!--Java document-->
-	<target name="all" depends="dist">
-		<echo message="------------Making Java Document------------------"/>
-		<javadoc packagenames="org.*"
-				sourcepath="${sources}"
-				destdir="${api}"
-				bottom="${bottom}"
-				charset="UTF-8"
-				author="false">
-			<classpath>
-				<pathelement location="${classes}"/>
-			</classpath>
-		</javadoc>
-		<jar jarfile="${jars}/ip2region-${version}-javadoc.jar" basedir="${api}" includes="**/*"></jar>
-		
-		<!--do the data clean up-->
-		<delete dir="${classes}"/>
-		<delete dir="${api}"/>
-	</target>
-	
-	<target name="usage">
-		<echo message="*** ip2region ANT Build Script ***"/>
-		<echo message="Usage: "/>
-		<echo message="   ant [target]"/>
-		<echo message=""/>     
-		<echo message="   target : "/>
-		<echo message="            build : Build Application"/>     
-		<echo message="            dist  : Build Application + Archive (JAR)"/>     
-		<echo message="            all   : Build Application + Archive + JavaDoc"/>       
-	</target>
-	
-</project>
--- a/binding/java/pom.xml
+++ b/binding/java/pom.xml
@ -1,190 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-
-  <groupId>org.lionsoul</groupId>
-  <artifactId>ip2region</artifactId>
-  <version>1.7.2</version>
-  <packaging>jar</packaging>
-
-  <name>ip2region</name>
-  <url>http://gitee.com/lionsoul/ip2region/</url>
-  <description>Open source internel address locator</description>
-  
-  <licenses>
-    <license>
-      <name>The Apache Software License, Version 2.0</name>
-      <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
-      <distribution>repo</distribution>
-    </license>
-  </licenses>
-  
-  <scm>
-      <url>git@gitee.com:lionsoul/ip2region.git</url>
-      <connection>scm:git:git@gitee.com:lionsoul/ip2region.git</connection>
-      <developerConnection>scm:git:git@gitee.com:lionsoul/ip2region.git</developerConnection>
-  </scm>
-  
-  <developers>
-      <developer>
-          <id>lionsoul</id>
-          <name>chenxin</name>
-          <email>chenxin619315@gmail.com</email>
-      </developer>
-  </developers>
-  
-  <issueManagement>
-      <url>http://gitee.com/lionsoul/ip2region/issues</url>
-      <system>gitee issues</system>
-  </issueManagement>
-
-  <properties>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-  </properties>
-
-  <dependencies>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <version>4.13.1</version>
-      <scope>test</scope>
-    </dependency>
-  </dependencies>
-  
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-source-plugin</artifactId>
-        <version>2.1.2</version>
-        <executions>
-          <execution>
-            <id>attach-sources</id>
-            <phase>package</phase>
-            <goals>
-              <goal>jar</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-      
-      <plugin>          
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>2.9</version>
-        <executions>
-          <execution>
-            <id>attach-javadocs</id>
-            <phase>package</phase>
-            <goals>
-              <goal>jar</goal>
-            </goals>
-            <configuration>
-              <additionalparam>${javadoc.opts}</additionalparam>
-            </configuration>
-          </execution>
-        </executions>
-        <configuration>
-             <failOnError>false</failOnError>
-        </configuration>
-       </plugin>
-       
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-shade-plugin</artifactId>
-        <version>1.4</version>
-        <executions>
-          <execution>
-            <phase>package</phase>
-            <goals>
-              <goal>shade</goal>
-            </goals>
-            <configuration>
-              <transformers>
-                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-                  <mainClass>org.lionsoul.ip2region.test.TestSearcher</mainClass>
-                </transformer>
-              </transformers>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
-  </build>
-
-  <profiles>
-	  <profile>
-	    <id>java8-doclint-disabled</id>
-	    <activation>
-	      <jdk>[1.8,)</jdk>
-	    </activation>
-	    <properties>
-	      <javadoc.opts>-Xdoclint:none</javadoc.opts>
-	    </properties>
-	  </profile>
-      <profile>
-          <id>release</id>
-          <build>
-              <plugins>
-                  <!-- Source -->
-                  <plugin>
-                      <groupId>org.apache.maven.plugins</groupId>
-                      <artifactId>maven-source-plugin</artifactId>
-                      <version>2.2.1</version>
-                      <executions>
-                          <execution>
-                              <phase>package</phase>
-                              <goals>
-                                  <goal>jar-no-fork</goal>
-                              </goals>
-                          </execution>
-                      </executions>
-                  </plugin>
-                  <!-- Javadoc -->
-                  <plugin>
-                      <groupId>org.apache.maven.plugins</groupId>
-                      <artifactId>maven-javadoc-plugin</artifactId>
-                      <version>2.9.1</version>
-                      <executions>
-                          <execution>
-                              <phase>package</phase>
-			                  <goals>
-			                    <goal>jar</goal>
-			                  </goals>
-			                  <configuration>
-			                    <additionalparam>${javadoc.opts}</additionalparam>
-			                  </configuration>
-                          </execution>
-                      </executions>
-                  </plugin>
-                  <!-- GPG -->
-                  <plugin>
-                      <groupId>org.apache.maven.plugins</groupId>
-                      <artifactId>maven-gpg-plugin</artifactId>
-                      <version>1.5</version>
-                      <executions>
-                          <execution>
-                              <phase>verify</phase>
-                              <goals>
-                                  <goal>sign</goal>
-                              </goals>
-                          </execution>
-                      </executions>
-                  </plugin>
-              </plugins>
-          </build>
-          <distributionManagement>
-              <snapshotRepository>
-                  <id>oss-parent</id>
-                  <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
-              </snapshotRepository>
-              <repository>
-                  <id>oss-parent</id>
-                  <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
-              </repository>
-          </distributionManagement>
-      </profile>
-  </profiles>
-
-</project>
--- a/binding/java/src/main/java/org/lionsoul/ip2region/DataBlock.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/DataBlock.java
@ -1,86 +0,0 @@
-package org.lionsoul.ip2region;
-
-/**
- * data block class
- * 
- * @author	chenxin<chenxin619315@gmail.com>
-*/
-public class DataBlock 
-{
-	/**
-	 * city id 
-	*/
-	private int city_id;
-	
-	/**
-	 * region address
-	*/
-	private String region;
-	
-	/**
-	 * region ptr in the db file
-	*/
-	private int dataPtr;
-	
-	/**
-	 * construct method
-	 * 
-	 * @param  city_id
-	 * @param  region  region string
-	 * @param  ptr data ptr
-	*/
-	public DataBlock( int city_id, String region, int dataPtr )
-	{
-		this.city_id = city_id;
-		this.region  = region;
-		this.dataPtr = dataPtr;
-	}
-	
-	public DataBlock(int city_id, String region)
-	{
-	    this(city_id, region, 0);
-	}
-
-	public int getCityId()
-	{
-		return city_id;
-	}
-
-	public DataBlock setCityId(int city_id)
-	{
-		this.city_id = city_id;
-		return this;
-	}
-
-	public String getRegion()
-	{
-		return region;
-	}
-
-	public DataBlock setRegion(String region)
-	{
-		this.region = region;
-		return this;
-	}
-	
-	public int getDataPtr()
-	{
-	    return dataPtr;
-	}
-	
-	public DataBlock setDataPtr(int dataPtr)
-	{
-	    this.dataPtr = dataPtr;
-	    return this;
-	}
-	
-	@Override
-	public String toString()
-	{
-		StringBuilder sb = new StringBuilder();
-		
-		sb.append(city_id).append('|').append(region).append('|').append(dataPtr);
-		return sb.toString();
-	}
-
-}
--- a/binding/java/src/main/java/org/lionsoul/ip2region/DbConfig.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/DbConfig.java
@ -1,64 +0,0 @@
-package org.lionsoul.ip2region;
-
-/**
- * database configuration class
- * 
- * @author chenxin<chenxin619315@gmail.com>
-*/
-public class DbConfig 
-{
-    /**
-     * total header data block size
-    */
-    private int totalHeaderSize;
-    
-    /**
-     * max index data block size
-     * u should always choice the fastest read block size 
-    */
-    private int indexBlockSize;
-    
-    /**
-     * construct method
-     * 
-     * @param    totalHeaderSize
-     * @param    dataBlockSize
-     * @throws DbMakerConfigException 
-    */
-    public DbConfig( int totalHeaderSize ) throws DbMakerConfigException
-    {
-        if ( (totalHeaderSize % 8) != 0 ) {
-            throw new DbMakerConfigException("totalHeaderSize must be times of 8");
-        }
-        
-        this.totalHeaderSize = totalHeaderSize;
-        this.indexBlockSize  = 8192; //4 * 2048
-    }
-    
-    public DbConfig() throws DbMakerConfigException
-    {
-        this(8 * 2048);
-    }
-
-    public int getTotalHeaderSize()
-    {
-        return totalHeaderSize;
-    }
-
-    public DbConfig setTotalHeaderSize(int totalHeaderSize)
-    {
-        this.totalHeaderSize = totalHeaderSize;
-        return this;
-    }
-
-    public int getIndexBlockSize()
-    {
-        return indexBlockSize;
-    }
-
-    public DbConfig setIndexBlockSize(int dataBlockSize)
-    {
-        this.indexBlockSize = dataBlockSize;
-        return this;
-    }
-}
--- a/binding/java/src/main/java/org/lionsoul/ip2region/DbMakerConfigException.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/DbMakerConfigException.java
@ -1,26 +0,0 @@
-package org.lionsoul.ip2region;
-
-/**
- * configuration exception
- * 
- * @author chenxin<chenxin619315@gmail.com>
-*/
-public class DbMakerConfigException extends Exception
-{
-    private static final long serialVersionUID = 4495714680349884838L;
-    
-    public DbMakerConfigException( String info )
-    {
-        super(info);
-    }
-    
-    public DbMakerConfigException( Throwable res )
-    {
-        super(res);
-    }
-    
-    public DbMakerConfigException( String info, Throwable res )
-    {
-        super(info, res);
-    }
-}
--- a/binding/java/src/main/java/org/lionsoul/ip2region/DbSearcher.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/DbSearcher.java
@ -1,409 +0,0 @@
-package org.lionsoul.ip2region;
-
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.io.RandomAccessFile;
-
-/**
- * ip db searcher class (Not thread safe)
- * 
- * @author chenxin<chenxin619315@gmail.com>
-*/
-public class DbSearcher 
-{
-    public static final int BTREE_ALGORITHM  = 1;
-    public static final int BINARY_ALGORITHM = 2;
-    public static final int MEMORY_ALGORITYM = 3;
-
-    /**
-     * db config
-    */
-    private DbConfig dbConfig = null;
-
-    /**
-     * db file access handler
-    */
-    private RandomAccessFile raf = null;
-
-    /**
-     * header blocks buffer 
-    */
-    private long[] HeaderSip = null;
-    private int[]  HeaderPtr = null;
-    private int headerLength;
-
-    /**
-     * super blocks info 
-    */
-    private long firstIndexPtr = 0;
-    private long lastIndexPtr = 0;
-    private int totalIndexBlocks = 0;
-
-    /**
-     * for memory mode
-     * the original db binary string
-    */
-    private byte[] dbBinStr = null;
-
-    /**
-     * construct class
-     * 
-     * @param   bdConfig
-     * @param   dbFile
-     * @throws  FileNotFoundException 
-    */
-    public DbSearcher( DbConfig dbConfig, String dbFile ) throws FileNotFoundException
-    {
-        this.dbConfig = dbConfig;
-        raf = new RandomAccessFile(dbFile, "r");
-    }
-
-    /**
-     * construct method with self-define std ip2region binary string support
-     * Thanks to the issue from Wendal at https://gitee.com/lionsoul/ip2region/issues/IILFL.
-     *
-     * Note: This construtor should be used for memory search ONLY !!!
-     *
-     * @param   dbConfig
-     * @param   dbBinStr
-     */
-    public DbSearcher(DbConfig dbConfig, byte[] dbBinStr)
-    {
-        this.dbConfig = dbConfig;
-        this.dbBinStr = dbBinStr;
-
-        firstIndexPtr = Util.getIntLong(dbBinStr, 0);
-        lastIndexPtr  = Util.getIntLong(dbBinStr, 4);
-        totalIndexBlocks = (int)((lastIndexPtr - firstIndexPtr)/IndexBlock.getIndexBlockLength()) + 1;
-    }
-
-    /**
-     * get the region with a int ip address with memory binary search algorithm
-     *
-     * @param   ip
-     * @throws  IOException
-    */
-    public DataBlock memorySearch(long ip) throws IOException
-    {
-        int blen = IndexBlock.getIndexBlockLength();
-        if ( dbBinStr == null ) {
-            dbBinStr = new byte[(int)raf.length()];
-            raf.seek(0L);
-            raf.readFully(dbBinStr, 0, dbBinStr.length);
-            
-            //initialize the global vars
-            firstIndexPtr    = Util.getIntLong(dbBinStr, 0);
-            lastIndexPtr     = Util.getIntLong(dbBinStr, 4);
-            totalIndexBlocks = (int)((lastIndexPtr - firstIndexPtr)/blen) + 1;
-        }
-        
-        //search the index blocks to define the data
-        int l = 0, h = totalIndexBlocks;
-        long sip, eip, dataptr = 0;
-        while ( l <= h ) {
-            int m = (l + h) >> 1;
-            int p = (int)(firstIndexPtr + m * blen);
-            
-            sip = Util.getIntLong(dbBinStr, p);
-            if ( ip < sip ) {
-                h = m - 1;
-            } else {
-                eip = Util.getIntLong(dbBinStr, p + 4);
-                if ( ip > eip ) {
-                    l = m + 1;
-                } else {
-                    dataptr = Util.getIntLong(dbBinStr, p + 8);
-                    break;
-                }
-            }
-        }
-        
-        //not matched
-        if ( dataptr == 0 ) return null;
-        
-        //get the data
-        int dataLen = (int)((dataptr >> 24) & 0xFF);
-        int dataPtr = (int)((dataptr & 0x00FFFFFF));
-        int city_id = (int)Util.getIntLong(dbBinStr, dataPtr);
-        String region = new String(dbBinStr, dataPtr + 4, dataLen - 4, "UTF-8");
-        
-        return new DataBlock(city_id, region, dataPtr);
-    }
-    
-    /**
-     * get the region throught the ip address with memory binary search algorithm
-     * 
-     * @param   ip
-     * @return  DataBlock
-     * @throws  IOException 
-    */
-    public DataBlock memorySearch( String ip ) throws IOException
-    {
-        return memorySearch(Util.ip2long(ip));
-    }
-    
-
-    /**
-     * get by index ptr
-     * 
-     * @param   indexPtr
-     * @throws  IOException 
-    */
-    public DataBlock getByIndexPtr( long ptr ) throws IOException
-    {
-        raf.seek(ptr);
-        byte[] buffer = new byte[12];
-        raf.readFully(buffer, 0, buffer.length);
-        //long startIp = Util.getIntLong(buffer, 0);
-        //long endIp = Util.getIntLong(buffer, 4);
-        long extra = Util.getIntLong(buffer, 8);
-        
-        int dataLen = (int)((extra >> 24) & 0xFF);
-        int dataPtr = (int)((extra & 0x00FFFFFF));
-        
-        raf.seek(dataPtr);
-        byte[] data = new byte[dataLen];
-        raf.readFully(data, 0, data.length);
-        
-        int city_id = (int)Util.getIntLong(data, 0);
-        String region = new String(data, 4, data.length - 4, "UTF-8");
-        
-        return new DataBlock(city_id, region, dataPtr);
-    }
-
-    /**
-     * get the region with a int ip address with b-tree algorithm
-     * 
-     * @param   ip
-     * @throws  IOException 
-    */
-    public DataBlock btreeSearch( long ip ) throws IOException
-    {
-        //check and load the header
-        if ( HeaderSip == null )  {
-            raf.seek(8L);    //pass the super block
-            byte[] b = new byte[dbConfig.getTotalHeaderSize()];
-            // byte[] b = new byte[4096];
-            raf.readFully(b, 0, b.length);
-            
-            //fill the header
-            int len = b.length >> 3, idx = 0;  //b.lenght / 8
-            HeaderSip = new long[len];
-            HeaderPtr = new int [len];
-            long startIp, dataPtr;
-            for ( int i = 0; i < b.length; i += 8 ) {
-                startIp = Util.getIntLong(b, i);
-                dataPtr = Util.getIntLong(b, i + 4);
-                if ( dataPtr == 0 ) break;
-                
-                HeaderSip[idx] = startIp;
-                HeaderPtr[idx] = (int)dataPtr;
-                idx++;
-            }
-            
-            headerLength = idx;
-        }
-        
-        //1. define the index block with the binary search
-        if ( ip == HeaderSip[0] ) {
-            return getByIndexPtr(HeaderPtr[0]);
-        } else if ( ip == HeaderSip[headerLength-1] ) {
-            return getByIndexPtr(HeaderPtr[headerLength-1]);
-        }
-        
-        int l = 0, h = headerLength, sptr = 0, eptr = 0;
-        while ( l <= h ) {
-            int m = (l + h) >> 1;
-            
-            //perfetc matched, just return it
-            if ( ip == HeaderSip[m] ) {
-                if ( m > 0 ) {
-                    sptr = HeaderPtr[m-1];
-                    eptr = HeaderPtr[m  ];
-                } else {
-                    sptr = HeaderPtr[m ];
-                    eptr = HeaderPtr[m+1];
-                }
-                
-                break;
-            }
-            
-            //less then the middle value
-            if ( ip < HeaderSip[m] ) {
-                if ( m == 0 ) {
-                    sptr = HeaderPtr[m  ];
-                    eptr = HeaderPtr[m+1];
-                    break;
-                } else if ( ip > HeaderSip[m-1] ) {
-                    sptr = HeaderPtr[m-1];
-                    eptr = HeaderPtr[m  ];
-                    break;
-                }
-                h = m - 1;
-            } else {
-                if ( m == headerLength - 1 ) {
-                    sptr = HeaderPtr[m-1];
-                    eptr = HeaderPtr[m  ];
-                    break;
-                } else if ( ip <= HeaderSip[m+1] ) {
-                    sptr = HeaderPtr[m  ];
-                    eptr = HeaderPtr[m+1];
-                    break;
-                }
-                l = m + 1;
-            }
-        }
-        
-        //match nothing just stop it
-        if ( sptr == 0 ) return null;
-        
-        //2. search the index blocks to define the data
-        int blockLen = eptr - sptr, blen = IndexBlock.getIndexBlockLength();
-        byte[] iBuffer = new byte[blockLen + blen];    //include the right border block
-        raf.seek(sptr);
-        raf.readFully(iBuffer, 0, iBuffer.length);
-        
-        l = 0; h = blockLen / blen;
-        long sip, eip, dataptr = 0;
-        while ( l <= h ) {
-            int m = (l + h) >> 1;
-            int p = m * blen;
-            sip = Util.getIntLong(iBuffer, p);
-            if ( ip < sip ) {
-                h = m - 1;
-            } else {
-                eip = Util.getIntLong(iBuffer, p + 4);
-                if ( ip > eip ) {
-                    l = m + 1;
-                } else {
-                    dataptr = Util.getIntLong(iBuffer, p + 8);
-                    break;
-                }
-            }
-        }
-        
-        //not matched
-        if ( dataptr == 0 ) return null;
-        
-        //3. get the data
-        int dataLen = (int)((dataptr >> 24) & 0xFF);
-        int dataPtr = (int)((dataptr & 0x00FFFFFF));
-        
-        raf.seek(dataPtr);
-        byte[] data = new byte[dataLen];
-        raf.readFully(data, 0, data.length);
-        
-        int city_id = (int)Util.getIntLong(data, 0);
-        String region = new String(data, 4, data.length - 4, "UTF-8");
-        
-        return new DataBlock(city_id, region, dataPtr);
-    }
-
-    /**
-     * get the region throught the ip address with b-tree search algorithm
-     * 
-     * @param   ip
-     * @return  DataBlock
-     * @throws  IOException 
-    */
-    public DataBlock btreeSearch( String ip ) throws IOException
-    {
-        return btreeSearch(Util.ip2long(ip));
-    }
-
-    /**
-     * get the region with a int ip address with binary search algorithm
-     * 
-     * @param   ip
-     * @throws  IOException 
-    */
-    public DataBlock binarySearch( long ip ) throws IOException
-    {
-        int blen = IndexBlock.getIndexBlockLength();
-        if ( totalIndexBlocks == 0 ) {
-            raf.seek(0L);
-            byte[] superBytes = new byte[8];
-            raf.readFully(superBytes, 0, superBytes.length);
-            //initialize the global vars
-            firstIndexPtr = Util.getIntLong(superBytes, 0);
-            lastIndexPtr = Util.getIntLong(superBytes, 4);
-            totalIndexBlocks = (int)((lastIndexPtr - firstIndexPtr)/blen) + 1;
-        }
-        
-        //search the index blocks to define the data
-        int l = 0, h = totalIndexBlocks;
-        byte[] buffer = new byte[blen];
-        long sip, eip, dataptr = 0;
-        while ( l <= h ) {
-            int m = (l + h) >> 1;
-            raf.seek(firstIndexPtr + m * blen);    //set the file pointer
-            raf.readFully(buffer, 0, buffer.length);
-            sip = Util.getIntLong(buffer, 0);
-            if ( ip < sip ) {
-                h = m - 1;
-            } else {
-                eip = Util.getIntLong(buffer, 4);
-                if ( ip > eip ) {
-                    l = m + 1;
-                } else {
-                    dataptr = Util.getIntLong(buffer, 8);
-                    break;
-                }
-            }
-        }
-        
-        //not matched
-        if ( dataptr == 0 ) return null;
-        
-        //get the data
-        int dataLen = (int)((dataptr >> 24) & 0xFF);
-        int dataPtr = (int)((dataptr & 0x00FFFFFF));
-        
-        raf.seek(dataPtr);
-        byte[] data = new byte[dataLen];
-        raf.readFully(data, 0, data.length);
-        
-        int city_id = (int)Util.getIntLong(data, 0);
-        String region = new String(data, 4, data.length - 4, "UTF-8");
-        
-        return new DataBlock(city_id, region, dataPtr);
-    }
-
-    /**
-     * get the region throught the ip address with binary search algorithm
-     * 
-     * @param   ip
-     * @return  DataBlock
-     * @throws  IOException 
-    */
-    public DataBlock binarySearch( String ip ) throws IOException
-    {
-        return binarySearch(Util.ip2long(ip));
-    }
-
-    /**
-     * get the db config
-     *
-     * @return  DbConfig
-    */
-    public DbConfig getDbConfig()
-    {
-        return dbConfig;
-    }
-
-    /**
-     * close the db 
-     * 
-     * @throws IOException 
-    */
-    public void close() throws IOException
-    {
-        HeaderSip = null;    //let gc do its work
-        HeaderPtr = null;
-        dbBinStr  = null;
-        if ( raf != null ) {
-            raf.close();
-        }
-    }
-
-}
--- a/binding/java/src/main/java/org/lionsoul/ip2region/HeaderBlock.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/HeaderBlock.java
@ -1,68 +0,0 @@
-package org.lionsoul.ip2region;
-
-/**
- * header block class
- * 
- * @author chenxin<chenxin619315@gmail.com>
-*/
-public class HeaderBlock 
-{
-    /**
-     * index block start ip address
-    */
-    private long indexStartIp;
-    
-    /**
-     * ip address 
-    */
-    private int indexPtr;
-    
-    public HeaderBlock( long indexStartIp, int indexPtr )
-    {
-        this.indexStartIp = indexStartIp;
-        this.indexPtr = indexPtr;
-    }
-
-    public long getIndexStartIp()
-    {
-        return indexStartIp;
-    }
-
-    public HeaderBlock setIndexStartIp(long indexStartIp)
-    {
-        this.indexStartIp = indexStartIp;
-        return this;
-    }
-
-    public int getIndexPtr()
-    {
-        return indexPtr;
-    }
-
-    public HeaderBlock setIndexPtr(int indexPtr)
-    {
-        this.indexPtr = indexPtr;
-        return this;
-    }
-    
-    /**
-     * get the bytes for db storage
-     * 
-     * @return    byte[]
-    */
-    public byte[] getBytes()
-    {
-        /*
-         * +------------+-----------+
-         * | 4bytes        | 4bytes    |
-         * +------------+-----------+
-         *  start ip      index ptr
-        */
-        byte[] b = new byte[8];
-        
-        Util.writeIntLong(b, 0, indexStartIp);
-        Util.writeIntLong(b, 4, indexPtr);
-        
-        return b;
-    }
-}
--- a/binding/java/src/main/java/org/lionsoul/ip2region/IndexBlock.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/IndexBlock.java
@ -1,113 +0,0 @@
-package org.lionsoul.ip2region;
-
-/**
- * item index class
- * 
- * @author chenxin<chenxin619315@gmail.com>
-*/
-public class IndexBlock 
-{
-    private static int LENGTH = 12;
-    
-    /**
-     * start ip address 
-    */
-    private long startIp;
-    
-    /**
-     * end ip address 
-    */
-    private long endIp;
-    
-    /**
-     * data ptr and data length 
-    */
-    private int dataPtr;
-    
-    /**
-     * data length 
-    */
-    private int dataLen;
-    
-    public IndexBlock(long startIp, long endIp, int dataPtr, int dataLen)
-    {
-        this.startIp = startIp;
-        this.endIp = endIp;
-        this.dataPtr = dataPtr;
-        this.dataLen = dataLen;
-    }
-
-    public long getStartIp()
-    {
-        return startIp;
-    }
-
-    public IndexBlock setStartIp(long startIp)
-    {
-        this.startIp = startIp;
-        return this;
-    }
-
-    public long getEndIp()
-    {
-        return endIp;
-    }
-
-    public IndexBlock setEndIp(long endIp)
-    {
-        this.endIp = endIp;
-        return this;
-    }
-
-    public int getDataPtr()
-    {
-        return dataPtr;
-    }
-
-    public IndexBlock setDataPtr(int dataPtr)
-    {
-        this.dataPtr = dataPtr;
-        return this;
-    }
-
-    public int getDataLen()
-    {
-        return dataLen;
-    }
-
-    public IndexBlock setDataLen(int dataLen)
-    {
-        this.dataLen = dataLen;
-        return this;
-    }
-    
-    public static int getIndexBlockLength()
-    {
-        return LENGTH;
-    }
-    
-    /**
-     * get the bytes for storage
-     * 
-     * @return    byte[]
-    */
-    public byte[] getBytes()
-    {
-        /*
-         * +------------+-----------+-----------+
-         * | 4bytes        | 4bytes    | 4bytes    |
-         * +------------+-----------+-----------+
-         *  start ip      end ip      data ptr + len 
-        */
-        byte[] b = new byte[12];
-        
-        Util.writeIntLong(b, 0, startIp);    //start ip
-        Util.writeIntLong(b, 4, endIp);        //end ip
-        
-        //write the data ptr and the length
-        long mix = dataPtr | ((dataLen << 24) & 0xFF000000L);
-        Util.writeIntLong(b, 8, mix);
-        
-        return b;
-    }
-}
--- a/binding/java/src/main/java/org/lionsoul/ip2region/Util.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/Util.java
@ -1,143 +0,0 @@
-package org.lionsoul.ip2region;
-
-/**
- * util class 
- * 
- * @author chenxin<chenxin619315@gmail.com>
-*/
-public class Util 
-{
-    /**
-     * write specfield bytes to a byte array start from offset
-     * 
-     * @param    b
-     * @param    offset
-     * @param    v
-     * @param    bytes
-    */
-    public static void write( byte[] b, int offset, long v, int bytes)
-    {
-        for ( int i = 0; i < bytes; i++ ) {
-            b[offset++] = (byte)((v >>> (8 * i)) & 0xFF);
-        }
-    }
-    
-    /**
-     * write a int to a byte array
-     * 
-     * @param    b
-     * @param    offet
-     * @param    v
-    */
-    public static void writeIntLong( byte[] b, int offset, long v )
-    {
-        b[offset++] = (byte)((v >>  0) & 0xFF);
-        b[offset++] = (byte)((v >>  8) & 0xFF);
-        b[offset++] = (byte)((v >> 16) & 0xFF);
-        b[offset  ] = (byte)((v >> 24) & 0xFF);
-    }
-    
-    /**
-     * get a int from a byte array start from the specifiled offset
-     * 
-     * @param    b
-     * @param    offset
-    */
-    public static long getIntLong( byte[] b, int offset )
-    {
-        return (
-            ((b[offset++] & 0x000000FFL)) |
-            ((b[offset++] <<  8) & 0x0000FF00L) |
-            ((b[offset++] << 16) & 0x00FF0000L) | 
-            ((b[offset  ] << 24) & 0xFF000000L)
-        );
-    }
-    
-    /**
-     * get a int from a byte array start from the specifield offset
-     * 
-     * @param    b
-     * @param    offset
-    */
-    public static int getInt3( byte[] b, int offset )
-    { 
-        return (
-            (b[offset++] & 0x000000FF) |
-            (b[offset++] & 0x0000FF00) |
-            (b[offset  ] & 0x00FF0000)
-        );
-    }
-    
-    public static int getInt2( byte[] b, int offset )
-    {
-        return (
-            (b[offset++] & 0x000000FF) |
-            (b[offset  ] & 0x0000FF00)
-        );
-    }
-    
-    public static int getInt1( byte[] b, int offset )
-    {
-        return (
-            (b[offset] & 0x000000FF)
-        );
-    }
-    
-    /**
-     * string ip to long ip
-     * 
-     * @param    ip
-     * @return    long
-    */
-    public static long ip2long( String ip )
-    {
-        String[] p = ip.split("\\.");
-        if ( p.length != 4 ) return 0;
-        
-        int p1 = ((Integer.valueOf(p[0]) << 24) & 0xFF000000);
-        int p2 = ((Integer.valueOf(p[1]) << 16) & 0x00FF0000);
-        int p3 = ((Integer.valueOf(p[2]) <<  8) & 0x0000FF00);
-        int p4 = ((Integer.valueOf(p[3]) <<  0) & 0x000000FF);
-        
-        return ((p1 | p2 | p3 | p4) & 0xFFFFFFFFL);
-    }
-    
-    /**
-     * int to ip string 
-     * 
-     * @param    ip
-     * @return    string
-    */
-    public static String long2ip( long ip )
-    {
-        StringBuilder sb = new StringBuilder();
-        
-        sb
-        .append((ip >> 24) & 0xFF).append('.')
-        .append((ip >> 16) & 0xFF).append('.')
-        .append((ip >>  8) & 0xFF).append('.')
-        .append((ip >>  0) & 0xFF);
-        
-        return sb.toString();
-    }
-    
-    /**
-     * check the validate of the specifeld ip address
-     * 
-     * @param    ip
-     * @return    boolean
-    */
-    public static boolean isIpAddress( String ip )
-    {
-        String[] p = ip.split("\\.");
-        if ( p.length != 4 ) return false;
-        
-        for ( String pp : p ) {
-            if ( pp.length() > 3 ) return false;
-            int val = Integer.valueOf(pp);
-            if ( val > 255 ) return false;
-        }
-        
-        return true;
-    }
-}
--- a/binding/java/src/main/java/org/lionsoul/ip2region/test/TestSearcher.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/test/TestSearcher.java
@ -1,120 +0,0 @@
-package org.lionsoul.ip2region.test;
-
-import java.io.BufferedReader;
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-
-import org.lionsoul.ip2region.DataBlock;
-import org.lionsoul.ip2region.DbConfig;
-import org.lionsoul.ip2region.DbMakerConfigException;
-import org.lionsoul.ip2region.DbSearcher;
-import org.lionsoul.ip2region.Util;
-
-/**
- * project test script
- * 
- * @author chenxin<chenxin619315@gmail.com>
-*/
-public class TestSearcher 
-{
-    public static void main(String[] argv)
-    {    
-        if ( argv.length == 0 ) {
-            System.out.println("| Usage: java -jar ip2region-{version}.jar [ip2region db file]");
-            return;
-        }
-        
-        File file = new File(argv[0]);
-        if ( file.exists() == false ) {
-            System.out.println("Error: Invalid ip2region.db file");
-            return;
-        }
-        
-        int algorithm = DbSearcher.BTREE_ALGORITHM;
-        String algoName = "B-tree";
-        if ( argv.length > 1 ) {
-            if ( argv[1].equalsIgnoreCase("binary")) {
-                algoName  = "Binary"; 
-                algorithm = DbSearcher.BINARY_ALGORITHM;
-            } else if ( argv[1].equalsIgnoreCase("memory") ) {
-                algoName  = "Memory";
-                algorithm = DbSearcher.MEMORY_ALGORITYM;
-            }
-        }
-        
-        try {
-            System.out.println("initializing "+algoName+" ... ");
-            DbConfig config = new DbConfig();
-            DbSearcher searcher = new DbSearcher(config, argv[0]);
-            BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
-            
-            //define the method
-            Method method = null;
-            switch ( algorithm ) 
-            {
-            case DbSearcher.BTREE_ALGORITHM:
-                method = searcher.getClass().getMethod("btreeSearch", String.class);
-                break;
-            case DbSearcher.BINARY_ALGORITHM:
-                method = searcher.getClass().getMethod("binarySearch", String.class);
-                break;
-            case DbSearcher.MEMORY_ALGORITYM:
-                method = searcher.getClass().getMethod("memorySearch", String.class);
-                break;
-            }
-            
-            System.out.println("+----------------------------------+");
-            System.out.println("| ip2region test shell             |");
-            System.out.println("| Author: chenxin619315@gmail.com  |");
-            System.out.println("| Type 'quit' to exit program      |");
-            System.out.println("+----------------------------------+");
-            
-            double sTime = 0, cTime = 0;
-            String line = null;
-            DataBlock dataBlock = null;
-            while ( true ) {
-                System.out.print("ip2region>> ");
-                line = reader.readLine().trim();
-                if ( line.length() < 2 ) continue;
-                if ( line.equalsIgnoreCase("quit") ) break;
-                if ( Util.isIpAddress(line) == false ) {
-                    System.out.println("Error: Invalid ip address");
-                    continue;
-                }
-                
-                sTime = System.nanoTime();
-                dataBlock = (DataBlock) method.invoke(searcher, line);
-                cTime = (System.nanoTime() - sTime) / 1000000;
-                System.out.printf("%s in %.5f millseconds\n", dataBlock, cTime);
-            }
-            
-            reader.close();
-            searcher.close();
-            System.out.println("+--Bye");
-        } catch (IOException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (DbMakerConfigException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (NoSuchMethodException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (SecurityException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (IllegalAccessException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (IllegalArgumentException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        } catch (InvocationTargetException e) {
-            // TODO Auto-generated catch block
-            e.printStackTrace();
-        }
-    }
-}
--- a/binding/java/src/main/java/org/lionsoul/ip2region/test/TestUnit.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/test/TestUnit.java
@ -1,96 +0,0 @@
-package org.lionsoul.ip2region.test;
-
-import java.io.BufferedReader;
-import java.io.BufferedWriter;
-import java.io.FileNotFoundException;
-import java.io.FileReader;
-import java.io.FileWriter;
-
-import org.lionsoul.ip2region.DataBlock;
-import org.lionsoul.ip2region.DbConfig;
-import org.lionsoul.ip2region.DbMakerConfigException;
-import org.lionsoul.ip2region.DbSearcher;
-
-/**
- * data check class
- * 
- * @author koma<komazhang@foxmail.com>
-**/
-
-public class TestUnit {
-
-    public static void main(String[] args) {
-        try {
-            DbSearcher _searcher = new DbSearcher(new DbConfig(), "./data/ip2region.db");
-            BufferedReader bfr   = new BufferedReader(new FileReader("./data/ip.merge.txt"));
-            BufferedWriter bwr   = new BufferedWriter(new FileWriter("./data/error_log.txt", true));
-            int errCount  = 0;
-            int lineCount = 0;
-            String str = null;
-            
-            while ( (str = bfr.readLine()) != null ) {
-                StringBuffer line = new StringBuffer(str);
-                //get first ip
-                int first_idx   = line.indexOf("|");
-                String first_ip = line.substring(0, first_idx);
-                
-                line = new StringBuffer( line.substring(first_idx + 1) );
-                
-                //get second ip
-                int second_idx   = line.indexOf("|");
-                String second_ip = line.substring(0, second_idx);
-                
-                //get addr
-                String source_region = line.substring(second_idx + 1);
-                
-                //search from DbSearcher
-                System.out.println("+---Start, start to search");
-                System.out.println("+---[Info]: Source region = "+source_region);
-                
-                System.out.println("+---[Info]: Step1, search for first IP: "+first_ip);
-                DataBlock fdata = _searcher.binarySearch(first_ip);
-                if ( ! fdata.getRegion().equalsIgnoreCase( source_region ) ) {
-                    System.out.println("[Error]: Search first IP failed, DB region = "+fdata.getRegion());
-                    bwr.write("[Source]: Region: "+fdata.getRegion());
-                    bwr.newLine();
-                    bwr.write("[Source]: First Ip: "+first_ip);
-                    bwr.newLine();
-                    bwr.write("[DB]: Region: "+fdata.getRegion());
-                    bwr.newLine();
-                    bwr.flush();
-                    errCount++;
-                }
-                
-                System.out.println("+---[Info]: Step2, search for second IP: "+second_ip);
-                DataBlock sdata = _searcher.btreeSearch(second_ip);
-                if ( ! sdata.getRegion().equalsIgnoreCase( source_region ) ) {
-                    System.out.println("[Error]: Search second IP failed, DB region = "+sdata.getRegion());
-                    bwr.write("[Source]: Region: "+sdata.getRegion());
-                    bwr.newLine();
-                    bwr.write("[Source]: First Ip: "+second_ip);
-                    bwr.newLine();
-                    bwr.write("[DB]: Region: "+sdata.getRegion());
-                    bwr.newLine();
-                    bwr.flush();
-                    errCount++;
-                }
-                
-                lineCount++;
-            }
-            
-            bwr.close();
-            bfr.close();
-            System.out.println("+---Done, search complished");
-            System.out.println("+---Statistics, Error count = "+errCount
-                                +", Total line = "+lineCount
-                                +", Fail ratio = "+((float)(errCount/lineCount))*100+"%");
-        } catch (FileNotFoundException e) {
-            e.printStackTrace();
-        } catch (DbMakerConfigException e) {
-            e.printStackTrace();
-        } catch ( Exception e ) {
-            e.printStackTrace();
-        }
-    }
-
-}
--- a/binding/java/src/main/java/org/lionsoul/ip2region/test/TestUtil.java
+++ b/binding/java/src/main/java/org/lionsoul/ip2region/test/TestUtil.java
@ -1,57 +0,0 @@
-package org.lionsoul.ip2region.test;
-
-import org.lionsoul.ip2region.Util;
-
-/**
- * project test script
- * 
- * @author chenxin<chenxin619315@gmail.com>
-*/
-public class TestUtil 
-{
-    public static void main(String[] argv)
-    {
-/*        //1. test the ip2long
-        String[] ipSet = new String[]{
-            "120.24.78.68", 
-            "120.24.229.68", 
-            "120.24.87.145", 
-            "218.17.162.99"
-        };
-        
-        for ( String ip : ipSet )
-        {
-            int ipInt = Util.ip2Int(ip);
-            System.out.println("src ip: " + ip + ", ip2Int: " + ipInt + ", int2IP: " + Util.int2IP(ipInt));
-        }*/
-        
-/*        int[] arr = new int[]{12344, -1234, 2146789, 0, -1024};
-        byte[] b = new byte[arr.length * 4];
-        
-        //write the int
-        System.out.println("+--Testing writeInt ... ");
-        int i, idx = 0;
-        for ( i = 0; i < b.length; i += 4 )
-        {
-            System.out.println("offset: " + i);
-            Util.writeInt(b, i, arr[idx++]);
-        }
-        System.out.println("|----[Ok]");
-        
-        //read the int
-        System.out.println("+--Testing getInt ... ");
-        idx = 0;
-        for ( i = 0; i < b.length; i += 4 )
-        {
-            System.out.println(arr[idx++]+", " + Util.getInt(b, i));
-        }
-        System.out.println("|----[Ok]");*/
-        
-/*        HeaderBlock headerBlock = new HeaderBlock(241658345, 2134785);
-        byte[] b = headerBlock.getBytes();
-        System.out.println(headerBlock.getIndexStartIp() + ", " + headerBlock.getIndexPtr());
-        System.out.println(Util.getInt(b, 0) + ", " + Util.getInt(b, 4));*/
-        
-        System.out.println(Util.ip2long("255.255.255.0"));
-    }
-}
--- a/binding/lua/Ip2region.lua
+++ b/binding/lua/Ip2region.lua
@ -1,443 +0,0 @@
--[[
-Ip2region lua binding
-
-@author chenxin<chenxin619315@gmail.com>
-@date   2018/10/02
-]]--
-
-require("bit32");
-
-local INDEX_BLOCK_LENGTH  = 12;
-local TOTAL_HEADER_LENGTH = 8192;
-local _M = {
-    dbFile = "",
-    dbFileHandler = "",
-    dbBinStr = "",
-    HeaderSip = "", 
-    HeaderPtr = "",
-    headerLen = 0,
-    firstIndexPtr = 0,
-    lastIndexPtr = 0, 
-    totalBlocks = 0
-};
-
-_G["Ip2region"] = _M;
-
-- set the __index to itself
-_M.__index = _M;
-
-- set the print meta-method
-_M.__tostring = function(table)
-    local t = {
-        "dbFile=" .. table.dbFile,
-        -- "dbFileHandler=" .. table.dbFileHandler,
-        "headerLen=" .. table.headerLen,
-        "firstIndexPtr" .. table.firstIndexPtr,
-        "lastIndexPtr" .. table.lastIndexPtr,
-        "totalBlocks" .. table.totalBlocks
-    };
-
-    return table.concat(t, ",");
-end
-
--[[
-construct method
-
-@param  obj
-@return Ip2region object
--]]
-function _M.new(dbFile)
-    obj = {};
-    setmetatable(obj, _M);
-    obj.dbFile = dbFile;
-    return obj;
-end
-
-
--[[
-internal function to get a integer from a binary string
-
-@param  dbBinStr
-@param  idx
-@return Integer
-]]--
-function getLong(bs, idx)
-    local a1 = string.byte(string.sub(bs, idx, idx));
-    local a2 = bit32.lshift(string.byte(string.sub(bs, idx+1, idx+1)),  8);
-    local a3 = bit32.lshift(string.byte(string.sub(bs, idx+2, idx+2)), 16);
-    local a4 = bit32.lshift(string.byte(string.sub(bs, idx+3, idx+3)), 24);
-
-    local val = bit32.bor(a1, a2);
-    val = bit32.bor(val, a3);
-    val = bit32.bor(val, a4);
-
-    return val;
-end
-
-
--[[
-internal function to convert the string ip to a long value
-
-@param  ip
-@return Integer
-]]--
-function _M.ip2long(self, ip)
-    -- dynamic arguments checking
-    -- to support object.ip2long and object:ip2long access
-    if ( type(self) == "string") then
-        ip = self;
-    end
-
-    local ini = 1;
-    local iip = 0;
-    local off = 24;
-    while true do
-        local pos = string.find(ip, '.', ini, true);
-        if ( not pos ) then
-            break;
-        end
-
-        local sub = string.sub(ip, ini, pos - 1);
-        if ( string.len(sub) < 1 ) then
-            return nil;
-        end
-
-        iip = bit32.bor(iip, bit32.lshift(tonumber(sub), off));
-        ini = pos + 1;
-        off = off - 8;
-    end
-
-    -- check if it is a valid ip address
-    if ( off ~= 0 or ini > string.len(ip) ) then
-        return nil;
-    end
-
-    local sub = string.sub(ip, ini);
-    if ( string.len(sub) < 1 ) then
-        return nil;
-    end
-
-    return bit32.bor(iip, bit32.lshift(tonumber(sub), off));
-end
-
-
--[[
-internal function to get the whole content of a file
-
-@param  file
-@return String
-]]--
-function get_file_contents(file)
-    local fi = io.input(file);
-    if ( not fi ) then
-        return nil;
-    end
-
-    local str = io.read("*a");
-    io.close();
-    return str;
-end
-
-
--[[
-set the current db file path
-
-@param  dbFile
-]]--
-function _M:setDbFile(dbFile)
-    self.dbFile = dbFile;
-end
-
-
--[[
-all the db binary string will be loaded into memory
-then search the memory only and this will a lot faster than disk base search
-@Note: invoke it once before put it to public invoke could make it thread safe
-
-@param  ip
-@return table or nil for failed
-]]--
-function _M:memorySearch(ip)
-    -- string ip conversion
-    if ( type(ip) == "string" ) then
-        ip = self:ip2long(ip);
-        if ( ip == nil ) then
-            return nil;
-        end
-    end;
-
-    -- check and load the binary string for the first time
-    if ( self.dbBinStr == "" ) then
-        self.dbBinStr = get_file_contents(self.dbFile);
-        if ( not self.dbBinStr ) then
-            return nil;
-        end
-
-        self.firstIndexPtr = getLong(self.dbBinStr, 1);
-        self.lastIndexPtr  = getLong(self.dbBinStr, 5);
-        self.totalBlocks   = (self.lastIndexPtr - self.firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
-    end
-
-
-    -- binary search to define the data
-    local l = 0;
-    local h = self.totalBlocks;
-    local dataPtr = 0;
-    while ( l <= h ) do
-        local m = math.floor((l + h) / 2);
-        local p = self.firstIndexPtr + m * INDEX_BLOCK_LENGTH;
-        local sip = getLong(self.dbBinStr, p + 1);
-        if ( ip < sip ) then
-            h = m - 1;
-        else
-            local eip = getLong(self.dbBinStr, p + 5);  -- 4 + 1
-            if ( ip > eip ) then
-                l = m + 1;
-            else
-                dataPtr = getLong(self.dbBinStr, p + 9); -- 8 + 1
-                break;
-            end
-        end
-    end
-
-    -- not matched just stop it here
-    if ( dataPtr == 0 ) then return nil end
-
-    -- get the data
-    local dataLen = bit32.band(bit32.rshift(dataPtr, 24), 0xFF);
-    dataPtr = bit32.band(dataPtr, 0x00FFFFFF);
-    local dptr = dataPtr + 5;   -- 4 + 1
-
-    return {
-        city_id = getLong(self.dbBinStr, dataPtr), 
-        region  = string.sub(self.dbBinStr, dptr, dptr + dataLen - 5)
-    };
-end
-
-
--[[
-get the data block through the specified ip address 
-or long ip numeric with binary search algorithm
-
-@param  ip
-@return table or nil for failed
-]]--
-function _M:binarySearch(ip)
-    -- check and conver the ip address
-    if ( type(ip) == "string" ) then
-        ip = self:ip2long(ip);
-        if ( ip == nil ) then
-            return nil;
-        end
-    end
-
-    if ( self.totalBlocks == 0 ) then
-        -- check and open the original db file
-        self.dbFileHandler = io.open(self.dbFile, "r");
-        if ( not self.dbFileHandler ) then
-            return nil;
-        end
-
-        self.dbFileHandler:seek("set", 0);
-        local superBlock = self.dbFileHandler:read(8);
-
-        self.firstIndexPtr = getLong(superBlock, 1);    -- 0 + 1
-        self.lastIndexPtr  = getLong(superBlock, 5);    -- 4 + 1
-        self.totalBlocks   = (self.lastIndexPtr-self.firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
-    end
-
-
-    -- binary search to define the data
-    local l = 0;
-    local h = self.totalBlocks;
-    local dataPtr = 0;
-    while ( l <= h ) do
-        local m = math.floor((l + h) / 2);
-        local p = m * INDEX_BLOCK_LENGTH;
-        self.dbFileHandler:seek("set", self.firstIndexPtr + p);
-        local buffer = self.dbFileHandler:read(INDEX_BLOCK_LENGTH);
-        local sip = getLong(buffer, 1); -- 0 + 1
-        if ( ip < sip ) then
-            h = m - 1;
-        else
-            local eip = getLong(buffer, 5);   -- 4 + 1
-            if ( ip > eip ) then
-                l = m + 1;
-            else
-                dataPtr = getLong(buffer, 9);   -- 8 + 1
-                break;
-            end
-        end
-    end
-
-    -- not matched just stop it here
-    if ( dataPtr == 0 ) then return nil; end
-
-
-    -- get the data
-    local dataLen = bit32.band(bit32.rshift(dataPtr, 24), 0xFF);
-    dataPtr = bit32.band(dataPtr, 0x00FFFFFF);
-
-    self.dbFileHandler:seek("set", dataPtr);
-    local data = self.dbFileHandler:read(dataLen);
-
-    return {
-        city_id = getLong(data, 1),    -- 0 + 1
-        region  = string.sub(data, 5)  -- 4 + 1
-    };
-end
-
-
--[[
-get the data block associated with the specified ip with b-tree search algorithm
-
-@param  ip
-@return table or nil for failed
-]]--
-function _M:btreeSearch(ip)
-    -- string ip to integer conversion
-    if ( type(ip) == "string" ) then
-        ip = self:ip2long(ip);
-        if ( ip == nil ) then
-            return nil;
-        end
-    end
-
-    -- check and load the header
-    if ( self.headerLen == 0 ) then
-        -- check and open the original db file
-        self.dbFileHandler = io.open(self.dbFile, 'r');
-        if ( not self.dbFileHandler ) then
-            return nil;
-        end
-
-        self.dbFileHandler:seek("set", 8);
-        local buffer = self.dbFileHandler:read(TOTAL_HEADER_LENGTH);
-        
-        -- fill the header
-        local i = 0;
-        local idx = 0;
-        self.HeaderSip = {};
-        self.HeaderPtr = {};
-        for i=0, TOTAL_HEADER_LENGTH, 8 do
-            local startIp = getLong(buffer, i + 1); -- 0 + 1
-            local dataPtr = getLong(buffer, i + 5); -- 4 + 1
-            if ( dataPtr == 0 ) then
-                break;
-            end
-
-            table.insert(self.HeaderSip, startIp);
-            table.insert(self.HeaderPtr, dataPtr);
-            idx = idx + 1;
-        end
-
-        self.headerLen = idx;
-    end
-    
-
-    -- 1. define the index block with the binary search
-    local l = 0; 
-    local h = self.headerLen;
-    local sptr = 0;
-    local eptr = 0;
-    while ( l <= h ) do
-        local m = math.floor((l + h) / 2);
-        -- perfetc matched, just return it
-        if ( ip == self.HeaderSip[m] ) then
-            if ( m > 0 ) then
-                sptr = self.HeaderPtr[m-1];
-                eptr = self.HeaderPtr[m  ];
-            else
-                sptr = self.HeaderPtr[m  ];
-                eptr = self.HeaderPtr[m+1];
-            end
-            
-            break;
-        end
-        
-        -- less then the middle value
-        if ( ip < self.HeaderSip[m] ) then
-            if ( m == 0 ) then
-                sptr = self.HeaderPtr[m  ];
-                eptr = self.HeaderPtr[m+1];
-                break;
-            elseif ( ip > self.HeaderSip[m-1] ) then
-                sptr = self.HeaderPtr[m-1];
-                eptr = self.HeaderPtr[m  ];
-                break;
-            end
-            h = m - 1;
-        else
-            if ( m == self.headerLen - 1 ) then
-                sptr = self.HeaderPtr[m-1];
-                eptr = self.HeaderPtr[m  ];
-                break;
-            elseif ( ip <= self.HeaderSip[m+1] ) then
-                sptr = self.HeaderPtr[m  ];
-                eptr = self.HeaderPtr[m+1];
-                break;
-            end
-            l = m + 1;
-        end
-    end
-    
-    -- match nothing just stop it
-    if ( sptr == 0 ) then return nil; end
-    
-    -- 2. search the index blocks to define the data
-    self.dbFileHandler:seek("set", sptr);
-    local blockLen = eptr - sptr;
-    local index = self.dbFileHandler:read(blockLen + INDEX_BLOCK_LENGTH);
-    local dataPtr = 0;
-
-    l = 0;
-    h = blockLen / INDEX_BLOCK_LENGTH;
-    while ( l <= h ) do
-        local m = math.floor((l + h) / 2);
-        local p = m * INDEX_BLOCK_LENGTH;
-        local sip = getLong(index, p + 1);       -- 0 + 1
-        if ( ip < sip ) then
-            h = m - 1;
-        else
-            local eip = getLong(index, p + 5);   -- 4 + 1
-            if ( ip > eip ) then
-                l = m + 1;
-            else
-                dataPtr = getLong(index, p + 9); -- 8 + 1
-                break;
-            end
-        end
-    end
-    
-    -- not matched
-    if ( dataPtr == 0 ) then return nil; end
-    
-    -- 3. get the data
-    local dataLen = bit32.band(bit32.rshift(dataPtr, 24), 0xFF);
-    dataPtr = bit32.band(dataPtr, 0x00FFFFFF);
-    
-    self.dbFileHandler:seek("set", dataPtr);
-    local data = self.dbFileHandler:read(dataLen);
-
-    return {
-        city_id = getLong(data, 1),     -- 0 + 1
-        region  = string.sub(data, 5)   -- 4 + 1
-    };
-end
-
-
--[[
-close the object and do the basic gc
-]]--
-function _M.close(self)
-    if ( self.dbFileHandler ~= "" ) then
-        self.dbFileHandler:close();
-    end
-
-    if ( self.dbBinStr ~= "" ) then
-        self.dbBinStr = nil;
-    end
-end
-
-
-return _M;
--- a/binding/lua/README.md
+++ b/binding/lua/README.md
@ -1,59 +0,0 @@
-# Lua ip2region binding
-
-### 一，如何测试
-* 1, cd到ip2region/binding/lua/根目录
-* 2, 运行testSearcher测试程序
-```shell
-lua testSearcher.lua ../../data/ip2region.db
-```
-* 3, 输入ip地址开始测试即可
-```shell
-initializing btree
-+----------------------------------+
-| ip2region test script            |
-| Author: chenxin619315@gmail.com  |
-| Type 'quit' to exit program      |
-+----------------------------------+
-ip2region>> 1.2.3.4
-0|美国|0|华盛顿|0|0 in 8.001000 millseconds
-ip2region>> 101.233.153.103
-2163|中国|0|广东省|深圳市|鹏博士 in 0.176000 millseconds
-ip2region>>
-```
-
-
-### 二，如何使用
-* 1, 将Ip2region.lua拷贝到你的package.path下
-* 2, 通过如下流程在你的lua程序中使用
-```lua
-- 包含模块
-local Ip2region = require "Ip2region";
-
-- 创建查询对象
-- 设置ip2region.db的文件地址，dbFile表示ip2region.db数据库文件的地址
-- 注意new方法是通过“.”调用，而不是“:”
-local ip2region = Ip2region.new("ip2region.db file path");
-
-- 也可以通过如下方式设置dbFile
-- ip2region.dbFile = "ip2region.db file path";
-- ip2region.setDbFile("ip2region.db file path");
-
-
-local data;
-
-- 查询，备注，尽量请使用“:”调用方法，使用“.”需要主动传递ip2region对象参数
-- 1，binary查询
-data = ip2region:binarySearch("101.233.153.103");
-
-- 2，btree查询
-data = ip2region:btreeSearch("101.233.153.103");
-
-- 3，memory查询
-data = ip2region:memorySearch("101.233.153.103");
-
-- 返回结果如下
-print("city_id=", data.city_id, "region=", data.region);
-```
-
-### 三，备注
-* 1，Ip2region模块的位运算依赖了bit32模块，这个是lua 5.2才开始支持的。
--- a/binding/lua/testSearcher.lua
+++ b/binding/lua/testSearcher.lua
@ -1,85 +0,0 @@
--[[
-ip2region lua client test script
-
-@author chenxin<chenxin619315@gmail.com>
-]]--
-
-- check the command line arguments
-if ( not arg[1] ) then
-    print([[
-Usage: lua testSearcher.lua [ip2region db file] [algorithm]
-+-Optional Algorithm: binary, b-tree, memory]]);
-    os.exit();
-end
-
-local Ip2region = require "Ip2region";
-- local cjson = require "cjson";
-- local socket = require "socket";
-
-
-- check and parse the dbFile and the method algorithm
-- Create a new ip2region object by the new interface
-local ip2region = Ip2region.new(arg[1]);
-
-- reset the dbFile by the follow two ways:
-- ip2region.dbFile = arg[1];
-- ip2region:setDbFile(arg[1]);
-
-
-local algorithm = "btree";
-if ( arg[2] ~= nil ) then
-    local arg_2 = string.lower(arg[2]);
-    if ( arg_2 ~= "binary" and arg_2 ~= "memory" ) then
-        algorithm = "binary";
-    elseif ( arg_2 == "memory" ) then
-        algorithm = "memory";
-    end
-end
-
-
-
-- local data = searcher:memorySearch("120.79.17.142");
-- local data = searcher:binarySearch("120.79.17.142");
-- local data = searcher:btreeSearch("120.79.17.142");
-print("initializing " .. algorithm ..[[ 
-+----------------------------------+
-| ip2region test script            |
-| Author: chenxin619315@gmail.com  |
-| Type 'quit' to exit program      |
-+----------------------------------+]]
-);
-
-while ( true ) do
-    io.write("ip2region>> ");
-    io.input(io.stdin);
-    local line = io.read();
-    if ( line == nil ) then
-        -- do nothing
-        break;
-    elseif ( line == "quit" ) then
-        break;
-    elseif ( ip2region.ip2long(line) == nil ) then
-        print("Invalid ip address=", line);
-    else
-        local data;
-        local s_time = os.clock();
-        if ( algorithm == "btree" ) then
-            data = ip2region:btreeSearch(line);
-        elseif ( algorithm == "binary" ) then
-            data = ip2region:binarySearch(line);
-        elseif ( algorithm == "memory" ) then
-            data = ip2region:memorySearch(line);
-        end
-
-        local cost_time = (os.clock() - s_time) * 1000; -- to millseconds
-        if ( data == nil ) then
-            io.write("Failed for ip=", line, " is it a valid ip address ?");
-        else
-            io.write(string.format("%u|%s in %5f millseconds\n", data.city_id, data.region, cost_time));
-        end
-    end
-end
-
-- close the object
-- print(ip2region);
-ip2region:close();
--- a/binding/lua_c/Makefile
+++ b/binding/lua_c/Makefile
@ -1,28 +0,0 @@
-# ip2region luc c module Make file
-# @author   chenxin<chenxin619315@gmail.com>
-# @date     2018/10/05
-
-# @Note
-# Please modify the LIBS and the LIB_DIR to fit you system
-# 
-
-VER = 5.2
-CC = gcc
-LIBS = -I ../c/ -I /usr/include/lua$(VER)/
-FFLAGS = -O2 -Wall -fPIC
-SO_FILE = Ip2region.so
-LIB_DIR = /usr/local/share/lua/$(VER)
-
-all: ../c/ip2region.c ../c/ip2region.h lua_ip2region.c
-	$(CC) $(FFLAGS) $(LIBS) ../c/ip2region.c lua_ip2region.c -fPIC -shared -o $(SO_FILE)
-
-install:
-	sudo mkdir -p $(LIB_DIR); \
-	sudo cp $(SO_FILE) $(LIB_DIR);\
-	echo "install Ip2region to $(LIB_DIR) successfully.";\
-
-clean:
-	find . -name \*.so | xargs rm -f
-	find . -name \*.o  | xargs rm -f
-
-.PHONY: clean
--- a/binding/lua_c/README.md
+++ b/binding/lua_c/README.md
@ -1,74 +0,0 @@
-# Lua ip2region c module binding
-
-
-### 一，如何安装
-* 1, cd到ip2region/binding/lua_c/根目录
-* 2, 运行如下命令
-```
-make
-sudo make install
-```
-
-* 3, 关于Makefile你可能需要更改里面的VER(版本号)和LIB_DIR(lua的so lib目录)来适应你的系统
-```shell
-VER = 5.2
-CC = gcc
-LIBS = -I ../c/ -I /usr/include/lua$(VER)/
-FFLAGS = -O2 -Wall -fPIC
-SO_FILE = Ip2region.so
-LIB_DIR = /usr/local/share/lua/$(VER)
-```
-
-### 二，如何测试
-* 1, cd到ip2region/binding/lua_c/根目录
-* 2, 运行testSearcher测试程序
-```shell
-lua testSearcher.lua ../../data/ip2region.db
-```
-* 3, 输入ip地址开始测试即可
-```shell
-initializing btree
-+----------------------------------+
-| ip2region test script            |
-| Author: chenxin619315@gmail.com  |
-| Type 'quit' to exit program      |
-+----------------------------------+
-ip2region>> 1.2.3.4
-0|美国|0|华盛顿|0|0 in 0.100000 millseconds
-ip2region>> 101.233.153.103
-2163|中国|0|广东省|深圳市|鹏博士 in 0.045000 millseconds
-ip2region>>
-```
-
-
-### 三，如何使用
-* 1, 先参考第一步安装，把Ip2region.so安装到你系统lua的lib目录下
-* 2, 通过如下流程在你的lua程序中使用
-```lua
-- 包含模块
-local Ip2region = require "Ip2region";
-
-- 创建查询对象
-- 设置ip2region.db的文件地址，dbFile表示ip2region.db数据库文件的地址
-- 注意new方法是通过“.”调用，而不是“:”
-local ip2region = Ip2region.new("ip2region.db file path");
-
-local data;
-
-- 查询，备注，尽量请使用“:”调用方法，使用“.”需要主动传递ip2region对象参数
-- 1，binary查询
-data = ip2region:binarySearch("101.233.153.103");
-
-- 2，btree查询
-data = ip2region:btreeSearch("101.233.153.103");
-
-- 3，memory查询
-data = ip2region:memorySearch("101.233.153.103");
-
-- 返回结果如下
-print("city_id=", data.city_id, "region=", data.region);
-```
-
-### 四，备注
-* 1，c模块的Ip2region以来binding/c/的实现，请保持binding/c/存在，并且和lua_c模块同目录。
-* 2，Ip2region的c模块拥有和c模块几乎等同的性能，生产建议使用lua_c模块代替纯lua模块的使用。
--- a/binding/lua_c/lua_ip2region.c
+++ b/binding/lua_c/lua_ip2region.c
@ -1,232 +0,0 @@
-/**
- * Ip2region lua c binding
- *
- * @author  chenxin<chenxin619315@gmail.com>
- * @date    2018/10/04
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <lua.h>
-#include <lauxlib.h>
-#include "../c/ip2region.h"
-
-#define L_METATABLE_NAME "Ip2region_MT"
-
-/** create a new ip2region object with a specified dbFile */
-static int lua_ip2region_new(lua_State *L)
-{
-    ip2region_entry *self;
-    const char *dbFile;
-
-    /* Check the arguments are valid */
-    dbFile = luaL_checkstring(L, 1);
-    if ( dbFile == NULL ) {
-        luaL_error(L, "dbFile cannot be empty");
-    }
-
-    /* Create the user data and push it onto the stack */
-    self = (ip2region_entry *) lua_newuserdata(L, sizeof(ip2region_entry));
-    /* Push the metatable onto the stack */
-    luaL_getmetatable(L, L_METATABLE_NAME);
-    /* Set the metatable on the userdata */
-    lua_setmetatable(L, -2);
-
-    /* Initialize the entry */
-    ip2region_create(self, dbFile);
-
-    return 1;
-}
-
-/** destroy the specified ip2region instance */
-static int lua_ip2region_destroy(lua_State *L)
-{
-    ip2region_entry *self;
-    self = (ip2region_entry *) luaL_checkudata(L, 1, L_METATABLE_NAME);
-    ip2region_destroy(self);
-
-    return 0;
-}
-
-
-
-#define get_search_args(L, entry, ip) \
-do {    \
-    luaL_argcheck(L, lua_gettop(L) == 2, 2, "Object and ip address needed"); \
-    entry = (ip2region_entry *) luaL_checkudata(L, 1, L_METATABLE_NAME); \
-    ip = luaL_checkstring(L, 2);  \
-} while (0); \
-
-
-#define set_search_result(L, data) \
-do { \
-    lua_newtable(L); \
-    lua_pushinteger(L, data.city_id); \
-    lua_setfield(L, -2, "city_id"); \
-    lua_pushfstring(L, "%s", data.region); \
-    lua_setfield(L, -2, "region"); \
-} while (0); \
-
-
-/** ip2region_memory_search wrapper */
-static int lua_ip2region_memory_search(lua_State *L)
-{
-    ip2region_entry *self;
-    const char *addr;
-    datablock_entry data;
-
-    // luaL_argcheck(L, lua_gettop(L) == 2, 2, "object and ip address needed");
-    // self = (ip2region_entry *) luaL_checkudata(L, 1, L_METATABLE_NAME);
-    // addr = luaL_checkstring(L, 2);
-    /* Check and get the search parameters */
-    get_search_args(L, self, addr);
-
-    /* do the memory search */
-    if ( ip2region_memory_search(self, ip2long(addr), &data) == 0 ) {
-        lua_pushnil(L);
-        return 1;
-    }
-    
-    // lua_newtable(L);
-    // lua_pushinteger(L, data.city_id);
-    // lua_setfield(L, -2, "city_id");
-    // lua_pushfstring(L, "%s", data.region);
-    // lua_setfield(L, -2, "region");
-    set_search_result(L, data);
-
-    return 1;
-}
-
-/** ip2region_binary_search wrapper */
-static int lua_ip2region_binary_search(lua_State *L)
-{
-    ip2region_entry *self;
-    const char *addr;
-    datablock_entry data;
-
-    /* Check and get the search parameters */
-    get_search_args(L, self, addr);
-
-    /* Do the binary search */
-    if ( ip2region_binary_search(self, ip2long(addr), &data) == 0 ) {
-        lua_pushnil(L);
-        return 1;
-    }
-
-    /* Set the return value */
-    set_search_result(L, data);
-
-    return 1;
-}
-
-/** ip2region_btree_search wrapper */
-static int lua_ip2region_btree_search(lua_State *L)
-{
-    ip2region_entry *self;
-    const char *addr;
-    datablock_entry data;
-
-    /* Check and get the search parameters */
-    get_search_args(L, self, addr);
-
-    /* Do the btree search */
-    if ( ip2region_btree_search(self, ip2long(addr), &data) == 0 ) {
-        lua_pushnil(L);
-        return 1;
-    }
-
-    /* Set the return value */
-    set_search_result(L, data);
-
-    return 1;
-}
-
-
-/** ip2long wrapper */
-static int lua_ip2long(lua_State *L)
-{
-    int argc;
-    const char *addr;
-    uint_t ipval;
-
-    argc = lua_gettop(L);
-    if ( argc == 1 ) {
-        addr = luaL_checkstring(L, 1);
-    } else {
-        luaL_checkudata(L, 1, L_METATABLE_NAME);
-        addr = luaL_checkstring(L, 2);
-    }
-
-    if ( (ipval = ip2long(addr)) == 0 ) {
-        lua_pushnil(L);
-        return 1;
-    }
-
-    lua_pushinteger(L, (ipval & 0x7FFFFFFF));
-
-    return 1;
-}
-
-static int lua_ip2region_tostring(lua_State *L)
-{
-    ip2region_entry *self;
-    self = (ip2region_entry *) luaL_checkudata(L, 1, L_METATABLE_NAME);
-
-    /* Push the string to return to lua */
-    lua_pushfstring(L, 
-        "dbFile=%s, headerLen=%d, fristIndexPtr=%d, lastIndexPtr=%d, totalBlocks=%d",
-        self->dbFile, self->headerLen, self->firstIndexPtr,
-        self->lastIndexPtr, self->totalBlocks
-    );
-
-    return 1;
-}
-
-
-/** module method array */
-static const struct luaL_Reg ip2region_methods[] = {
-    // { "new",            lua_ip2region_new },
-    // { "ip2long",        lua_ip2long },
-    { "memorySearch",   lua_ip2region_memory_search },
-    { "binarySearch",   lua_ip2region_binary_search },
-    { "btreeSearch",    lua_ip2region_btree_search },
-    { "close",          lua_ip2region_destroy },
-    { "__gc",           lua_ip2region_destroy },
-    { "__tostring",     lua_ip2region_tostring },
-    { NULL, NULL },
-};
-
-/** module function array */
-static const struct luaL_Reg ip2region_functions[] = {
-    { "new",        lua_ip2region_new },
-    { "ip2long",    lua_ip2long },
-    { NULL, NULL }
-};
-
-/** module open function interface */
-int luaopen_Ip2region(lua_State *L)
-{
-    /* Create a metatable and push it onto the stack */
-    luaL_newmetatable(L, L_METATABLE_NAME);
-    /* Duplicate the metatable on the stack */
-    lua_pushvalue(L, -1);
-
-    /* Pop the first metatable off the stack
-     * and assign it to the __index of the second one.
-     * so we set the metatable to the table itself.
-    */
-    lua_setfield(L, -2, "__index");
-
-
-    /* Set the methods fo the metatable that could and should be 
-     * access via object:func in lua block 
-     */
-    luaL_setfuncs(L, ip2region_methods, 0);
-    luaL_setfuncs(L, ip2region_functions, 0);
-
-    /* Finally register the object.func functions
-     * into the table witch at the top of the stack */
-    // luaL_newlib(L, ip2region_functions);
-
-    return 1;
-}
--- a/binding/lua_c/testSearcher.lua
+++ b/binding/lua_c/testSearcher.lua
@ -1,86 +0,0 @@
--[[
-ip2region lua client test script
-
-@author chenxin<chenxin619315@gmail.com>
-]]--
-
-- check the command line arguments
-if ( not arg[1] ) then
-    print([[
-Usage: lua testSearcher.lua [ip2region db file] [algorithm]
-+-Optional Algorithm: binary, b-tree, memory]]);
-    os.exit();
-end
-
-local Ip2region = require "Ip2region";
-- local cjson = require "cjson";
-- local socket = require "socket";
-
-
-- check and parse the dbFile and the method algorithm
-- Create a new ip2region object by the new interface
-local ip2region = Ip2region.new(arg[1]);
-
-- reset the dbFile by the follow two ways:
-- ip2region.dbFile = arg[1];
-- ip2region:setDbFile(arg[1]);
-
-
-local algorithm = "btree";
-if ( arg[2] ~= nil ) then
-    local arg_2 = string.lower(arg[2]);
-    if ( arg_2 ~= "binary" and arg_2 ~= "memory" ) then
-        algorithm = "binary";
-    elseif ( arg_2 == "memory" ) then
-        algorithm = "memory";
-    end
-end
-
-
-
-- local data = searcher:memorySearch("120.79.17.142");
-- local data = searcher:binarySearch("120.79.17.142");
-- local data = searcher:btreeSearch("120.79.17.142");
-print("initializing " .. algorithm ..[[ 
-+----------------------------------+
-| ip2region test script            |
-| Author: chenxin619315@gmail.com  |
-| Type 'quit' to exit program      |
-+----------------------------------+]]
-);
-
-while ( true ) do
-    io.write("ip2region>> ");
-    io.input(io.stdin);
-    local line = io.read();
-    if ( line == nil ) then
-        -- do nothing
-        break;
-    elseif ( line == "quit" ) then
-        break;
-    elseif ( Ip2region.ip2long(line) == nil ) then
-        print("Invalid ip address=", line);
-    else
-        local data;
-        local s_time = os.clock();
-        if ( algorithm == "btree" ) then
-            data = ip2region:btreeSearch(line);
-        elseif ( algorithm == "binary" ) then
-            data = ip2region:binarySearch(line);
-        elseif ( algorithm == "memory" ) then
-            data = ip2region:memorySearch(line);
-        end
-
-        local cost_time = (os.clock() - s_time) * 1000; -- to millseconds
-        if ( data == nil ) then
-            io.write("Failed for ip=", line, " is it a valid ip address ?");
-        else
-            io.write(string.format("%u|%s in %5f millseconds\n", data.city_id, data.region, cost_time));
-        end
-    end
-end
-
-- close the object
-- Also the lua gc will invoke it automatically
-- print(ip2region);
-ip2region:close();
--- a/binding/nginx/README.md
+++ b/binding/nginx/README.md
@ -1,3 +0,0 @@
-# 说明 
-
- 编译本模块时，请手动链接对../c/ip2region.c文件的依赖。
--- a/binding/nginx/config
+++ b/binding/nginx/config
@ -1,44 +0,0 @@
-ngx_addon_name="ngx_ip2region_module"
-
-IP2REGION_CORE_MODULES="                                         \
-                ngx_ip2region_module                             \
-                "
-
-IP2REGION_DEPS="                                                 \
-                $ngx_addon_dir/ip2region.h			\
-		$ngx_addon_dir/ngx_ip2region.h			\
-                "
-
-IP2REGION_CORE_SRCS="                                            \
-                $ngx_addon_dir/ip2region.c                   \
-                $ngx_addon_dir/ngx_ip2region_module.c              \
-                "
-
-
-
-if [ -f auto/module ] ; then
-    ngx_module_incs=$ngx_addon_dir
-    ngx_module_deps=$IP2REGION_DEPS
-
-    if [ $ngx_module_link = DYNAMIC ] ; then
-        ngx_module_name="$IP2REGION_CORE_MODULES"
-        ngx_module_srcs="$IP2REGION_CORE_SRCS"
-
-        . auto/module
-
-    else
-        ngx_module_type=CORE
-        ngx_module_name=$IP2REGION_CORE_MODULES
-        ngx_module_srcs=$IP2REGION_CORE_SRCS
-
-        . auto/module      
-    fi
-
-else
-    CORE_MODULES="$CORE_MODULES $IP2REGION_CORE_MODULES"
-   
-    NGX_ADDON_DEPS="$NGX_ADDON_DEPS $IP2REGION_DEPS"
-    NGX_ADDON_SRCS="$NGX_ADDON_SRCS $IP2REGION_CORE_SRCS"
-
-    CFLAGS="$CFLAGS -I$ngx_addon_dir "
-fi   
--- a/binding/nginx/ngx_ip2region.h
+++ b/binding/nginx/ngx_ip2region.h
@ -1,23 +0,0 @@
-#ifndef __NGX_IP2REGION_H__
-#define __NGX_IP2REGION_H__
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include "../c/ip2region.h"
-
-typedef struct ngx_ip2region_conf_s {
-    ngx_str_t   db_file;
-    ngx_uint_t  algo;
-} ngx_ip2region_conf_t;
-
-typedef uint_t (*search_func_ptr)(ip2region_t, uint_t, datablock_t);
-
-extern ngx_int_t ngx_ip2region_search(ngx_str_t *addr_text, ngx_str_t *isp, ngx_str_t *city);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
--- a/binding/nginx/ngx_ip2region_module.c
+++ b/binding/nginx/ngx_ip2region_module.c
@ -1,260 +0,0 @@
-#include <ngx_config.h>
-#include <ngx_core.h>
-
-#include "ngx_ip2region.h"
-
-
-static void *ngx_ip2region_create_conf(ngx_cycle_t *cycle);
-static char *ngx_ip2region_init_conf(ngx_cycle_t *cycle, void *conf);
-
-static ngx_int_t ngx_ip2region_init_process(ngx_cycle_t *cycle);
-static void ngx_ip2region_exit_process(ngx_cycle_t *cycle);
-
-static ip2region_entry g_ip2region_entry;
-
-
-search_func_ptr ip2region_search_func;
-
-
-#define NGX_IP2REGION_MEMORY 0
-#define NGX_IP2REGION_BINARY 1
-#define NGX_IP2REGION_BTREE 2
-
-static ngx_conf_enum_t  ngx_ip2region_search_algo[] = {
-    { ngx_string("memory"), NGX_IP2REGION_MEMORY },
-    { ngx_string("binary"), NGX_IP2REGION_BINARY },
-    { ngx_string("btree"), NGX_IP2REGION_BTREE},
-    { ngx_null_string, 0 }
-};
-
-
-static ngx_command_t ngx_ip2region_commands[] = {
-
-    {
-        ngx_string("ip2region_db_file"),
-        NGX_MAIN_CONF | NGX_DIRECT_CONF | NGX_CONF_TAKE1,
-        ngx_conf_set_str_slot,
-        0,
-        offsetof(ngx_ip2region_conf_t, db_file),
-        NULL
-    },
-
-    {
-        ngx_string("ip2region_algo"),
-        NGX_MAIN_CONF | NGX_DIRECT_CONF | NGX_CONF_TAKE1,
-        ngx_conf_set_enum_slot,
-        0,
-        offsetof(ngx_ip2region_conf_t, algo),
-        &ngx_ip2region_search_algo
-    },
-
-    ngx_null_command
-};
-
-
-static ngx_core_module_t  ngx_ip2region_module_ctx = {
-    ngx_string("ip2region"),
-    ngx_ip2region_create_conf,
-    ngx_ip2region_init_conf,
-};
-
-
-ngx_module_t  ngx_ip2region_module = {
-    NGX_MODULE_V1,
-    &ngx_ip2region_module_ctx,             /* module context */
-    ngx_ip2region_commands,                /* module directives */
-    NGX_CORE_MODULE,                       /* module type */
-    NULL,                                  /* init master */
-    NULL,                                  /* init module */
-    ngx_ip2region_init_process,            /* init process */
-    NULL,                                  /* init thread */
-    NULL,                                  /* exit thread */
-    ngx_ip2region_exit_process,            /* exit process */
-    NULL,                                  /* exit master */
-    NGX_MODULE_V1_PADDING
-};
-
-static void *
-ngx_ip2region_create_conf(ngx_cycle_t *cycle)
-{
-    ngx_ip2region_conf_t  *ip2region_conf;
-    ip2region_conf = ngx_pcalloc(cycle->pool, sizeof(ngx_ip2region_conf_t));
-
-    if(ip2region_conf == NULL) {
-        return NULL;
-    }
-
-    ip2region_conf->algo = NGX_CONF_UNSET_UINT;
-    return ip2region_conf;
-}
-
-static char *
-ngx_ip2region_init_conf(ngx_cycle_t *cycle, void *conf)
-{
-    ngx_ip2region_conf_t  *ip2region_conf = (ngx_ip2region_conf_t *)conf;
-
-    if(ip2region_conf->db_file.len == 0) {
-        //ngx_str_set(&ip2region_conf->db_file, "conf/ip2region.db");
-        return NGX_CONF_OK;
-    }
-
-    if(ngx_conf_full_name(cycle, &ip2region_conf->db_file, 0) != NGX_OK) {
-        return NGX_CONF_ERROR;
-    }
-
-    ngx_log_debug1(NGX_LOG_INFO, ngx_cycle->log, 0, "%V", &ip2region_conf->db_file);
-
-    if(ip2region_conf->algo == NGX_CONF_UNSET_UINT) {
-        ip2region_conf->algo = NGX_IP2REGION_MEMORY;
-    }
-
-    return NGX_CONF_OK;
-}
-
-static ngx_int_t
-ngx_ip2region_init_process(ngx_cycle_t *cycle)
-{
-    ngx_ip2region_conf_t *conf = (ngx_ip2region_conf_t *)ngx_get_conf(ngx_cycle->conf_ctx, ngx_ip2region_module);
-
-    if(conf->db_file.len == 0) {
-        ngx_log_debug0(NGX_LOG_INFO, ngx_cycle->log, 0, "ip2region not init");
-        return NGX_OK;
-    }
-
-    if(!ip2region_create(&g_ip2region_entry, (char *)conf->db_file.data)) {
-        ngx_log_error(NGX_LOG_ERR, ngx_cycle->log, 0, "ip2region create failed: %V", &conf->db_file);
-        return NGX_ERROR;
-    }
-
-    switch(conf->algo) {
-        default:
-        case NGX_IP2REGION_MEMORY:
-            ip2region_search_func = ip2region_memory_search;
-            break;
-
-        case NGX_IP2REGION_BINARY:
-            ip2region_search_func = ip2region_binary_search;
-            break;
-
-        case NGX_IP2REGION_BTREE:
-            ip2region_search_func = ip2region_btree_search;
-            break;
-    }
-
-    ngx_log_error(NGX_LOG_INFO, ngx_cycle->log, 0, "ip2region create succcess: algo=%ui", conf->algo);
-    return NGX_OK;
-}
-
-static void
-ngx_ip2region_exit_process(ngx_cycle_t *cycle)
-{
-    ip2region_destroy(&g_ip2region_entry);
-    ngx_log_debug0(NGX_LOG_INFO, ngx_cycle->log, 0, "ip2region destroy");
-}
-
-static ngx_inline u_char *
-ngx_strrchr(u_char *first, u_char *p, u_char c)
-{
-    while(p >= first) {
-        if(*p == c) {
-            return p;
-        }
-
-        p--;
-    }
-
-    return NULL;
-}
-
-static ngx_inline uint32_t
-ngx_inet_aton(u_char *data, ngx_uint_t len)
-{
-    long long  result = 0;
-    long long  temp = 0;
-    u_char      *last = data + len;
-    int        point = 0;
-
-    while(data <= last) {
-        if(*data == '.' || data == last) {
-            if(temp > 255) {
-                return NGX_ERROR;
-            }
-
-            result = (result << 8) + temp;
-            temp = 0;
-            ++point;
-
-            if(point == 4) {
-                break;
-            }
-
-        } else if(*data <= '9' && *data >= '0') {
-            temp = temp * 10 + (*data - '0');
-
-        } else {
-            return NGX_ERROR;
-        }
-
-        ++data;
-    }
-
-    if(point != 4) {
-        return NGX_ERROR;
-    }
-
-    return result;
-}
-
-ngx_int_t
-ngx_ip2region_search(ngx_str_t *addr_text, ngx_str_t *isp, ngx_str_t *city)
-{
-    if(g_ip2region_entry.dbHandler == NULL) {
-        ngx_log_error(NGX_LOG_ERR, ngx_cycle->log, 0, "search error ip %V, ip2region doesn't create", addr_text);
-        return NGX_ERROR;
-    }
-
-    uint32_t addr_binary = ngx_inet_aton(addr_text->data, addr_text->len);
-
-    if(addr_binary == (uint32_t)NGX_ERROR) {
-        ngx_log_error(NGX_LOG_ERR, ngx_cycle->log, 0, "search error ip %V: bad ip address", addr_text);
-        return NGX_ERROR;
-    }
-
-    datablock_entry datablock;
-    ngx_memzero(&datablock, sizeof(datablock));
-    uint_t rc = ip2region_search_func(&g_ip2region_entry, (uint_t)addr_binary, &datablock);
-
-    if(!rc) {
-        ngx_log_error(NGX_LOG_ERR, ngx_cycle->log, 0, "%V search failed", addr_text);
-        return NGX_ERROR;
-    }
-
-    ngx_log_debug2(NGX_LOG_INFO, ngx_cycle->log, 0, "%V: %s", addr_text, datablock.region);
-    //城市Id 国家|区域|省份|城市|ISP
-    u_char *end = (u_char *)(datablock.region + ngx_strlen(datablock.region));
-    u_char *pos = ngx_strrchr((u_char *)datablock.region, end, '|');
-
-    if(!pos) {
-        ngx_log_error(NGX_LOG_ERR, ngx_cycle->log, 0, "search isp failed");
-        return NGX_ERROR;
-    }
-
-    u_char isp_buffer[64] = {0};
-    ngx_snprintf(isp_buffer, sizeof(isp_buffer), "%*s%Z", end - pos, pos + 1);
-    ngx_log_debug3(NGX_LOG_INFO, ngx_cycle->log, 0, "%V: %s [%s]", addr_text, datablock.region, (char *)isp_buffer);
-
-    if(city) {
-        end = pos - 1;
-        u_char *pos_city = ngx_strrchr((u_char *)datablock.region, end, '|');
-
-        if(!pos_city) {
-            ngx_log_debug0(NGX_LOG_ERR, ngx_cycle->log, 0, "search city failed");
-            return NGX_ERROR;
-        }
-
-        u_char city_buffer[64] = {0};
-        ngx_snprintf(city_buffer, sizeof(city_buffer), "%*s%Z", end - pos_city, pos_city + 1);
-    }
-
-    return NGX_OK;
-}
--- a/binding/nodejs/.gitignore
+++ b/binding/nodejs/.gitignore
@ -1,2 +0,0 @@
-node_modules/
-data/
--- a/binding/nodejs/.prettierrc
+++ b/binding/nodejs/.prettierrc
@ -1,4 +0,0 @@
-{
-  "singleQuote": true,
-  "tabWidth": 4
-}
--- a/binding/nodejs/README.md
+++ b/binding/nodejs/README.md
@ -1,103 +0,0 @@
-# nodejs 客户端
-
-官方维护的 ip2region, 每次数据更新后会更新到 npm 
-
-
-## Install
-
-**node 版本 : >= 6.0.0**
-
-```
-npm install node-ip2region --save 
-```
-
-## 已测试通过的 node 版本列表
-
-```
-6.0.0
-6.11.2
-8.0.0
-10.0.0
-12.0.0
-```
-
-
-## Example
-
-```
-const searcher = require('node-ip2region').create();
-searcher.btreeSearchSync('xxx.xxx.xxx.xxx')
-// => { city: 2163, region: '中国|0|广东省|深圳市|联通' }
-```
-
-## 实现情况：
-
-现已实现同步和异步查询，具体使用方法可以参考 `nodejs\tests\constructorTest.spec.js` 和`nodejs\tests\createTest.spec.js`。
-
-## 如何贡献？
-
-你可以任意修改代码，但必须确保通过全部的单元测试。要保证通过全部的单元测试，请在 Nodejs 控制台下切换到 nodejs 目录：
-
-1）在此之前，请先运行 `npm i` 确保你已经安装了各类初始化第三方工具。
-2）然后运行 `npm run coverage` 确保你的代码可以通过全部测试（必要时可以添加测试）。
-
-```bash
-D:\Projects\ip2region\binding\nodejs>npm run coverage
-
-> ip2region@0.0.1 coverage D:\Projects\ip2region\binding\nodejs
-> npm run test && jest --coverage
-
-
-> ip2region@0.0.1 test D:\Projects\ip2region\binding\nodejs
-> jest
-
- PASS  tests\constructorTest.spec.js
- PASS  tests\createTest.spec.js
- PASS  tests\exceptionTest.spec.js
-
-Snapshot Summary
- › 168 snapshots written in 2 test suites.
-
-Test Suites: 3 passed, 3 total
-Tests:       14 passed, 14 total
-Snapshots:   168 added, 168 total
-Time:        1.645s
-Ran all test suites.
- PASS  tests\constructorTest.spec.js
- PASS  tests\createTest.spec.js
- PASS  tests\exceptionTest.spec.js
----------------------|----------|----------|----------|----------|-------------------|
-File                  |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
----------------------|----------|----------|----------|----------|-------------------|
-All files             |    92.34 |    80.77 |       96 |    93.83 |                   |
- nodejs               |    91.95 |    80.26 |    95.65 |    93.51 |                   |
-  ip2region.js        |    91.95 |    80.26 |    95.65 |    93.51 |... 09,410,460,484 |
- nodejs/tests/utils   |      100 |      100 |      100 |      100 |                   |
-  asyncFor.js         |      100 |      100 |      100 |      100 |                   |
-  fetchMainVersion.js |      100 |      100 |      100 |      100 |                   |
-  testData.js         |      100 |      100 |      100 |      100 |                   |
----------------------|----------|----------|----------|----------|-------------------|
-
-Test Suites: 3 passed, 3 total
-Tests:       14 passed, 14 total
-Snapshots:   168 passed, 168 total
-Time:        1.792s
-Ran all test suites.
-```
-3）使用benchmark测试，结果如下：
-```bash
-D:\Projects\ip2region\binding\nodejs>node D:\Projects\ip2region\binding\nodejs\tests\benchmarkTests\main.js
-MemorySearchSync x 55,969 ops/sec ±2.22% (90 runs sampled)
-BinarySearchSync x 610 ops/sec ±5.41% (77 runs sampled)
-BtreeSearchSync x 2,439 ops/sec ±6.93% (69 runs sampled)
-MemorySearch x 2,924 ops/sec ±0.67% (85 runs sampled)
-BinarySearch x 154 ops/sec ±2.20% (69 runs sampled)
-BtreeSearch x 294 ops/sec ±2.58% (76 runs sampled)
-Rand    Name                Time (in milliseconds)
-1       MemorySearchSync    0.018
-2       MemorySearch        0.342
-3       BtreeSearchSync     0.410
-4       BinarySearchSync    1.639
-5       BtreeSearch         3.407
-6       BinarySearch        6.497
-```
--- a/binding/nodejs/deploy.sh
+++ b/binding/nodejs/deploy.sh
@ -1,11 +0,0 @@
-#!/bin/sh
-echo 'create dir'
-if [ ! -d "data" ]; then
-  mkdir data
-fi
-
-echo "copy db"
-cp '../../data/ip2region.db' './data/'
-
-echo "npm publish"
-npm publish
--- a/binding/nodejs/ip2region.js
+++ b/binding/nodejs/ip2region.js
@ -1,634 +0,0 @@
-/**
- * ip2region client for nodejs
- *
- * project: https://github.com/lionsoul2014/ip2region
- *
- * @author dongyado<dongyado@gmail.com>
- * @author leeching<leeching.fx@gmail.com>
- * @author dongwei<maledong_github@outlook.com>
- */
-const fs = require('fs');
-const path = require('path');
-const DEFAULT_DB_PATH  = path.join(__dirname,'./data/ip2region.db') ;
-
-//#region Private Functions
-/**
- * Convert ip to long (xxx.xxx.xxx.xxx to a integer)
- *
- * @param {string} ip
- * @return {number} long value
- */
-function _ip2long(ip) {
-    const arr = ip.split('.');
-    if (arr.length !== 4) {
-        throw new Error('invalid ip');
-    }
-    return arr.reduce((val, n, i) => {
-        n = Number(n);
-        if (!Number.isInteger(n) || n < 0 || n > 255) {
-            throw new Error('invalid ip');
-        }
-        return val + IP_BASE[i] * n;
-    }, 0);
-}
-
-/**
- * Get long value from buffer with specified offset
- *
- * @param {Buffer} buffer
- * @param {number} offset
- * @return {number} long value
- */
-function _getLong(buffer, offset) {
-    const val =
-        (buffer[offset] & 0x000000ff) |
-        ((buffer[offset + 1] << 8) & 0x0000ff00) |
-        ((buffer[offset + 2] << 16) & 0x00ff0000) |
-        ((buffer[offset + 3] << 24) & 0xff000000);
-    return val < 0 ? val >>> 0 : val;
-}
-
-//#endregion
-
-//#region Private Variables
-
-// We don't wanna expose a private global settings to
-// the public for safety reason.
-const _globalInstances = new Map();
-
-const IP_BASE = [16777216, 65536, 256, 1];
-const INDEX_BLOCK_LENGTH = 12;
-const TOTAL_HEADER_LENGTH = 8192;
-
-// Private Message Symbols for functions
-const PrepareHeader = Symbol('#PrepareHeader');
-const CalTotalBlocks = Symbol('#CalsTotalBlocks');
-const ReadDataSync = Symbol('#ReadDataSync');
-const ReadData = Symbol('#ReadData');
-
-//#endregion
-class IP2Region {
-
-    //#region Private Functions
-
-    [CalTotalBlocks]() {
-        const superBlock = Buffer.alloc(8);
-        fs.readSync(this.dbFd, superBlock, 0, 8, 0);
-        this.firstIndexPtr = _getLong(superBlock, 0);
-        this.lastIndexPtr = _getLong(superBlock, 4);
-        this.totalBlocks =
-            (this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH + 1;
-    }
-
-    [PrepareHeader]() {
-        fs.readSync(
-            this.dbFd,
-            this.headerIndexBuffer,
-            0,
-            TOTAL_HEADER_LENGTH,
-            8
-        );
-
-        for (let i = 0; i < TOTAL_HEADER_LENGTH; i += 8) {
-            const startIp = _getLong(this.headerIndexBuffer, i);
-            const dataPtr = _getLong(this.headerIndexBuffer, i + 4);
-            if (dataPtr == 0) break;
-
-            this.headerSip.push(startIp);
-            this.headerPtr.push(dataPtr);
-            this.headerLen++; // header index size count
-        }
-    }
-
-    [ReadData](dataPos, callBack) {
-        if (dataPos == 0) return callBack(null, null);
-        const dataLen = (dataPos >> 24) & 0xff;
-        dataPos = dataPos & 0x00ffffff;
-        const dataBuffer = Buffer.alloc(dataLen);
-
-        fs.read(this.dbFd, dataBuffer, 0, dataLen, dataPos, (err, result) => {
-            if (err) {
-                callBack(err, null);
-            }
-            else {
-                const city = _getLong(dataBuffer, 0);
-                const region = dataBuffer.toString('utf8', 4, dataLen);
-                callBack(null, { city, region });
-            }
-        });
-    }
-
-    [ReadDataSync](dataPos) {
-        if (dataPos == 0) return null;
-        const dataLen = (dataPos >> 24) & 0xff;
-        dataPos = dataPos & 0x00ffffff;
-        const dataBuffer = Buffer.alloc(dataLen);
-
-        fs.readSync(this.dbFd, dataBuffer, 0, dataLen, dataPos);
-
-        const city = _getLong(dataBuffer, 0);
-        const region = dataBuffer.toString('utf8', 4, dataLen);
-
-        return { city, region };
-    }
-    //#endregion
-
-    //#region Static Functions
-
-    // Single Instance
-    static create(dbPath = DEFAULT_DB_PATH) {
-        let existInstance = _globalInstances.get(dbPath);
-        if (existInstance == null) {
-            existInstance = new IP2Region({ dbPath: dbPath });
-        }
-        return existInstance;
-    }
-
-    /**
-     * For backward compatibility
-     */
-    static destroy() {
-        _globalInstances.forEach(([key, instance]) => {
-            instance.destroy();
-        });
-    }
-
-    //#endregion
-
-    constructor(options = {}) {
-
-        const { dbPath } = options;
-
-        // Keep for MemorySearch
-        this.totalInMemoryBytesSize = fs.statSync(dbPath).size;
-        this.totalInMemoryBytes = null;
-
-        this.dbFd = fs.openSync(dbPath, 'r');
-
-        this.dbPath = dbPath;
-
-        _globalInstances.set(this.dbPath, this);
-
-        this.totalBlocks = this.firstIndexPtr = this.lastIndexPtr = 0;
-        this[CalTotalBlocks]();
-
-        this.headerIndexBuffer = Buffer.alloc(TOTAL_HEADER_LENGTH);
-        this.headerSip = [];
-        this.headerPtr = [];
-        this.headerLen = 0;
-        this[PrepareHeader]();
-    }
-
-    //#region Public Functions
-    /**
-     * Destroy the current file by closing it.
-     */
-    destroy() {
-        fs.closeSync(this.dbFd);
-        _globalInstances.delete(this.dbPath);
-    }
-
-    /**
-     * Sync of binarySearch.
-     * @param {string} ip The IP address to search for.
-     * @return {SearchResult} A result something like `{ city: 2163, region: '中国|0|广东省|深圳市|阿里云' }`
-     */
-    binarySearchSync(ip) {
-
-        ip = _ip2long(ip);
-
-        let low = 0;
-        let mid = 0;
-        let high = this.totalBlocks;
-        let pos = 0;
-        let sip = 0;
-        const indexBuffer = Buffer.alloc(12);
-
-        // binary search
-        while (low <= high) {
-            mid = (low + high) >> 1;
-            pos = this.firstIndexPtr + mid * INDEX_BLOCK_LENGTH;
-            fs.readSync(this.dbFd, indexBuffer, 0, INDEX_BLOCK_LENGTH, pos);
-            sip = _getLong(indexBuffer, 0);
-
-            if (ip < sip) {
-                high = mid - 1;
-            } else {
-                sip = _getLong(indexBuffer, 4);
-                if (ip > sip) {
-                    low = mid + 1;
-                } else {
-                    sip = _getLong(indexBuffer, 8);
-                    break;
-                }
-            }
-        }
-        return this[ReadDataSync](sip);
-    }
-
-    /**
-     * Async of binarySearch.
-     * @param {string} ip The IP address to search for.
-     * @param {Function} callBack The callBack function with two parameters, if successful,
-     * err is null and result is `{ city: 2163, region: '中国|0|广东省|深圳市|阿里云' }`
-     */
-    binarySearch(ip, callBack) {
-
-        ip = _ip2long(ip);
-
-        let low = 0;
-        let mid = 0;
-        let high = this.totalBlocks;
-        let pos = 0;
-        let sip = 0;
-        const indexBuffer = Buffer.alloc(12);
-        const _self = this;
-
-        // Because `while` is a sync method, we have to convert this to a recursive loop
-        // and in each loop we should continue calling `setImmediate` until we found the IP.
-        function _innerAsyncWhile() {
-            if (low <= high) {
-                mid = (low + high) >> 1;
-                pos = _self.firstIndexPtr + mid * INDEX_BLOCK_LENGTH;
-
-                // Now async read the file
-                fs.read(_self.dbFd, indexBuffer, 0, INDEX_BLOCK_LENGTH, pos, (err) => {
-
-                    if (err) {
-                        return callBack(err, null);
-                    }
-
-                    sip = _getLong(indexBuffer, 0);
-
-                    if (ip < sip) {
-                        high = mid - 1;
-                        setImmediate(_innerAsyncWhile);
-                    } else {
-                        sip = _getLong(indexBuffer, 4);
-                        if (ip > sip) {
-                            low = mid + 1;
-                            setImmediate(_innerAsyncWhile);
-                        } else {
-                            sip = _getLong(indexBuffer, 8);
-                            _self[ReadData](sip, (err, result) => {
-                                callBack(err, result);
-                            });
-                        }
-                    }
-                });
-            }
-        }
-
-        // Call this immediately
-        _innerAsyncWhile();
-
-    }
-
-    /**
-     * Sync of btreeSearch.
-     * @param {string} ip The IP address to search for.
-     * @return {Function} A result something like `{ city: 2163, region: '中国|0|广东省|深圳市|阿里云' }`
-     */
-    btreeSearchSync(ip) {
-
-        ip = _ip2long(ip);
-
-        // first search  (in header index)
-        let low = 0;
-        let mid = 0;
-        let high = this.headerLen;
-        let sptr = 0;
-        let eptr = 0;
-
-        while (low <= high) {
-            mid = (low + high) >> 1;
-
-            if (ip == this.headerSip[mid]) {
-                if (mid > 0) {
-                    sptr = this.headerPtr[mid - 1];
-                    eptr = this.headerPtr[mid];
-                } else {
-                    sptr = this.headerPtr[mid];
-                    eptr = this.headerPtr[mid + 1];
-                }
-                break;
-            }
-
-            if (ip < this.headerSip[mid]) {
-                if (mid == 0) {
-                    sptr = this.headerPtr[mid];
-                    eptr = this.headerPtr[mid + 1];
-                    break;
-                } else if (ip > this.headerSip[mid - 1]) {
-                    sptr = this.headerPtr[mid - 1];
-                    eptr = this.headerPtr[mid];
-                    break;
-                }
-                high = mid - 1;
-            } else {
-                if (mid == this.headerLen - 1) {
-                    sptr = this.headerPtr[mid - 1];
-                    eptr = this.headerPtr[mid];
-                    break;
-                } else if (ip <= this.headerSip[mid + 1]) {
-                    sptr = this.headerPtr[mid];
-                    eptr = this.headerPtr[mid + 1];
-                    break;
-                }
-                low = mid + 1;
-            }
-        }
-
-        // match nothing
-        if (sptr == 0) return null;
-
-        // second search (in index)
-        const blockLen = eptr - sptr;
-        const blockBuffer = Buffer.alloc(blockLen + INDEX_BLOCK_LENGTH);
-        fs.readSync(
-            this.dbFd,
-            blockBuffer,
-            0,
-            blockLen + INDEX_BLOCK_LENGTH,
-            sptr
-        );
-
-        low = 0;
-        high = blockLen / INDEX_BLOCK_LENGTH;
-
-        let p = 0;
-        let sip = 0;
-
-        while (low <= high) {
-            mid = (low + high) >> 1;
-            p = mid * INDEX_BLOCK_LENGTH;
-            sip = _getLong(blockBuffer, p);
-
-            if (ip < sip) {
-                high = mid - 1;
-            } else {
-                sip = _getLong(blockBuffer, p + 4);
-                if (ip > sip) {
-                    low = mid + 1;
-                } else {
-                    sip = _getLong(blockBuffer, p + 8);
-                    break;
-                }
-            }
-        }
-        return this[ReadDataSync](sip);
-    }
-
-    /**
-    * Async of btreeSearch.
-     * @param {string} ip The IP address to search for.
-     * @param {Function} callBack The callBack function with two parameters, if successful,
-     * err is null and result is `{ city: 2163, region: '中国|0|广东省|深圳市|阿里云' }`
-    */
-    btreeSearch(ip, callBack) {
-        ip = _ip2long(ip);
-
-        // first search  (in header index)
-        let low = 0;
-        let mid = 0;
-        let high = this.headerLen;
-        let sptr = 0;
-        let eptr = 0;
-
-        while (low <= high) {
-            mid = (low + high) >> 1;
-
-            if (ip == this.headerSip[mid]) {
-                if (mid > 0) {
-                    sptr = this.headerPtr[mid - 1];
-                    eptr = this.headerPtr[mid];
-                } else {
-                    sptr = this.headerPtr[mid];
-                    eptr = this.headerPtr[mid + 1];
-                }
-                break;
-            }
-
-            if (ip < this.headerSip[mid]) {
-                if (mid == 0) {
-                    sptr = this.headerPtr[mid];
-                    eptr = this.headerPtr[mid + 1];
-                    break;
-                } else if (ip > this.headerSip[mid - 1]) {
-                    sptr = this.headerPtr[mid - 1];
-                    eptr = this.headerPtr[mid];
-                    break;
-                }
-                high = mid - 1;
-            } else {
-                if (mid == this.headerLen - 1) {
-                    sptr = this.headerPtr[mid - 1];
-                    eptr = this.headerPtr[mid];
-                    break;
-                } else if (ip <= this.headerSip[mid + 1]) {
-                    sptr = this.headerPtr[mid];
-                    eptr = this.headerPtr[mid + 1];
-                    break;
-                }
-                low = mid + 1;
-            }
-        }
-
-        // match nothing
-        if (sptr == 0) return callBack(null, null);
-
-        let p = 0;
-        let sip = 0;
-
-        // second search (in index)
-        const blockLen = eptr - sptr;
-        const blockBuffer = Buffer.alloc(blockLen + INDEX_BLOCK_LENGTH);
-        low = 0;
-        high = blockLen / INDEX_BLOCK_LENGTH;
-
-        const _self = this;
-
-        function _innerAsyncWhile() {
-
-            if (low <= high) {
-
-                mid = (low + high) >> 1;
-                p = mid * INDEX_BLOCK_LENGTH;
-
-                // Use this to call the method itself as
-                // an asynchronize step
-                fs.read(_self.dbFd, blockBuffer,
-                    0,
-                    blockLen + INDEX_BLOCK_LENGTH,
-                    sptr, (err) => {
-
-                        if (err) {
-                            return callBack(err, null);
-                        }
-
-                        sip = _getLong(blockBuffer, p);
-
-                        if (ip < sip) {
-                            high = mid - 1;
-                            setImmediate(_innerAsyncWhile);
-                        } else {
-                            sip = _getLong(blockBuffer, p + 4);
-                            if (ip > sip) {
-                                low = mid + 1;
-                                setImmediate(_innerAsyncWhile);
-                            } else {
-                                sip = _getLong(blockBuffer, p + 8);
-                                _self[ReadData](sip, (err, result) => {
-                                    callBack(err, result);
-                                });
-                            }
-                        }
-                    });
-            }
-            else {
-                // If we found nothing, return null
-                return callBack(null, null);
-            }
-        }
-
-        _innerAsyncWhile();
-    }
-
-    /**
-     * Sync of MemorySearch.
-     * @param {String} ip 
-     */
-    memorySearchSync(ip) {
-
-        ip = _ip2long(ip);
-
-        if (this.totalInMemoryBytes === null) {
-
-            this.totalInMemoryBytes = Buffer.alloc(this.totalInMemoryBytesSize);
-            fs.readSync(this.dbFd, this.totalInMemoryBytes, 0, this.totalInMemoryBytesSize, 0);
-
-            this.firstIndexPtr = _getLong(this.totalInMemoryBytes, 0);
-            this.lastIndexPtr = _getLong(this.totalInMemoryBytes, 4);
-            this.totalBlocks = ((this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH) | 0 + 1;
-        }
-
-        let l = 0, h = this.totalBlocks;
-        let sip = 0;
-        let m = 0, p = 0;
-
-        while (l <= h) {
-            m = (l + h) >> 1;
-            p = (this.firstIndexPtr + m * INDEX_BLOCK_LENGTH) | 0;
-
-            sip = _getLong(this.totalInMemoryBytes, p);
-
-            if (ip < sip) {
-                h = m - 1;
-            }
-            else {
-                sip = _getLong(this.totalInMemoryBytes, p + 4);
-                if (ip > sip) {
-                    l = m + 1;
-                }
-                else {
-                    sip = _getLong(this.totalInMemoryBytes, p + 8);
-                    //not matched
-                    if (sip === 0) return null;
-
-                    //get the data
-                    let dataLen = ((sip >> 24) & 0xFF) | 0;
-                    let dataPtr = ((sip & 0x00FFFFFF)) | 0;
-                    let city = _getLong(this.totalInMemoryBytes, dataPtr);
-
-                    const bufArray = new Array();
-                    for (let startPos = dataPtr + 4, i = startPos; i < startPos + dataLen - 4; ++i) {
-                        bufArray.push(this.totalInMemoryBytes[i]);
-                    }
-                    const region = Buffer.from(bufArray, 0).toString();
-                    return { city, region };
-                }
-            }
-        }
-    }
-
-    /**
-     * Async of MemorySearch.
-     * @param {String} ip 
-     */
-    memorySearch(ip, callBack) {
-
-        let _ip = _ip2long(ip);
-        let l = 0, h = this.totalBlocks;
-        let sip = 0;
-        let m = 0, p = 0;
-        let self = this;
-
-        function _innerMemorySearchLoop() {
-
-            if (l <= h) {
-
-                m = (l + h) >> 1;
-                p = (self.firstIndexPtr + m * INDEX_BLOCK_LENGTH) | 0;
-
-                sip = _getLong(self.totalInMemoryBytes, p);
-
-                if (_ip < sip) {
-                    h = m - 1;
-                    setImmediate(_innerMemorySearchLoop);
-                }
-                else {
-                    sip = _getLong(self.totalInMemoryBytes, p + 4);
-
-                    if (_ip > sip) {
-                        l = m + 1;
-                        setImmediate(_innerMemorySearchLoop);
-                    }
-                    else {
-                        sip = _getLong(self.totalInMemoryBytes, p + 8);
-                        //not matched
-                        if (sip === 0) return callBack(null, null);
-
-                        //get the data
-                        let dataLen = ((sip >> 24) & 0xFF) | 0;
-                        let dataPtr = ((sip & 0x00FFFFFF)) | 0;
-                        let city = _getLong(self.totalInMemoryBytes, dataPtr);
-
-                        const bufArray = new Array();
-                        for (let startPos = dataPtr + 4, i = startPos; i < startPos + dataLen - 4; ++i) {
-                            bufArray.push(self.totalInMemoryBytes[i]);
-                        }
-                        const region = Buffer.from(bufArray).toString();
-                        callBack(null, { city, region });
-                    }
-                }
-            }
-            else {
-                callBack(null, null);
-            }
-        }
-
-        if (this.totalInMemoryBytes === null) {
-
-            this.totalInMemoryBytes = Buffer.alloc(this.totalInMemoryBytesSize);
-
-            fs.read(this.dbFd, this.totalInMemoryBytes, 0, this.totalInMemoryBytesSize, 0, (err) => {
-                if (err) {
-                    callBack(err, null);
-                }
-                else {
-                    this.firstIndexPtr = _getLong(this.totalInMemoryBytes, 0);
-                    this.lastIndexPtr = _getLong(this.totalInMemoryBytes, 4);
-                    this.totalBlocks = ((this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH) | 0 + 1;
-
-                    _innerMemorySearchLoop();
-                }
-            });
-        }
-        else {
-            _innerMemorySearchLoop();
-        }
-    }
-}
-//#endregion
-
-module.exports = IP2Region;
--- a/binding/nodejs/package-lock.json
+++ b/binding/nodejs/package-lock.json
--- a/binding/nodejs/package.json
+++ b/binding/nodejs/package.json
@ -1,33 +0,0 @@
-{
-  "name": "node-ip2region",
-  "version": "1.0.2",
-  "description": "official nodejs client of ip2region",
-  "main": "ip2region.js",
-  "scripts": {
-    "test": "jest",
-    "coverage": "npm run test && jest --coverage"
-  },
-  "files": ["data/"],
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/lionsoul2014/ip2region"
-  },
-  "keywords": [
-    "ip2region",
-    "ip",
-    "region"
-  ],
-  "author": "dongyado",
-  "license": "ISC",
-  "bugs": {
-    "url": "https://github.com/lionsoul2014/ip2region/issues"
-  },
-  "homepage": "https://github.com/lionsoul2014/ip2region",
-  "devDependencies": {
-    "jest": "^19.0.2",
-    "benchmark": "^2.1.4"
-  },
-  "engines": {
-    "node" : ">=6.0.0"
-  }
-}
--- a/binding/nodejs/tests/benchmarkTests/main.js
+++ b/binding/nodejs/tests/benchmarkTests/main.js
@ -1,94 +0,0 @@
-const Benchmark = require('benchmark');
-
-const suite = new Benchmark.Suite();
-const searcher = require('../../ip2region').create('../../data/ip2region.db');
-const testDatas = require('../utils/testData');
-const asyncFor = require('../utils/asyncFor');
-
-suite.add("MemorySearchSync", () => {
-    for (let i = 0; i < testDatas.length; ++i) {
-        searcher.memorySearchSync(testDatas[i]);
-    }
-})
-    .add("BinarySearchSync", () => {
-        for (let i = 0; i < testDatas.length; ++i) {
-            searcher.binarySearchSync(testDatas[i]);
-        }
-    })
-    .add("BtreeSearchSync", () => {
-        for (let i = 0; i < testDatas.length; ++i) {
-            searcher.btreeSearchSync(testDatas[i]);
-        }
-    })
-    .add("MemorySearch", {
-        defer: true,
-        fn: function (completeCallBack) {
-            asyncFor(testDatas,
-                (v, c) => {
-                    searcher.memorySearch(v, () => {
-                        c();
-                    });
-                },
-                () => {
-                    completeCallBack.resolve();
-                });
-        }
-    })
-    .add("BinarySearch", {
-        defer: true,
-        fn: function (completeCallBack) {
-            asyncFor(testDatas,
-                (v, c) => {
-                    searcher.binarySearch(v, () => {
-                        c();
-                    });
-                },
-                () => {
-                    completeCallBack.resolve();
-                });
-        }
-    })
-    .add("BtreeSearch", {
-        defer: true,
-        fn: function (completeCallBack) {
-            asyncFor(testDatas,
-                (v, c) => {
-                    searcher.btreeSearch(v, () => {
-                        c();
-                    });
-                },
-                () => {
-                    completeCallBack.resolve();
-                });
-        }
-    })
-    .on('cycle', function (event) {
-        console.log(String(event.target));
-    })
-    .on('complete', function () {
-
-        let results = new Array();
-
-        for (let prop in this) {
-            if (!isNaN(prop)) {
-                const eachResult = {
-                    name: this[prop].name,
-                    mean: this[prop].stats.mean * 1000,  //second => millisecond
-                    moe: this[prop].stats.moe,
-                    rme: this[prop].stats.rme,
-                    sem: this[prop].stats.sem
-                }
-                results.push(eachResult);
-            }
-        }
-
-        results = results.sort((a, b) => { return a.mean - b.mean });
-
-        console.log(`Rand\t${'Name'.padEnd(20)}Time (in milliseconds)`);
-        let id = 1;
-
-        for (let r of results) {
-            console.log(`${id++}\t${r.name.padEnd(20)}${r.mean.toFixed(3)}`);
-        }
-    })
-    .run({ async: true });
--- a/binding/nodejs/tests/unitTests/constructorTest.spec.js
+++ b/binding/nodejs/tests/unitTests/constructorTest.spec.js
@ -1,145 +0,0 @@
-// This test is used for tesing of a static function `create` of IP2Region
-const IP2Region = require('../../ip2region');
-const testIps = require('../utils/testData');
-const asyncFor = require('../utils/asyncFor');
-
-describe('Constructor Test', () => {
-  let instance;
-
-  beforeAll(() => {
-    instance = new IP2Region({ dbPath: '../../data/ip2region.db' });
-  });
-
-  afterAll(() => {
-    IP2Region.destroy();
-  });
-
-  test('btreeSearchSync query', () => {
-    for (const ip of testIps) {
-      expect(instance.btreeSearchSync(ip)).toMatchSnapshot();
-    }
-  });
-
-  test('binarySearchSync query', () => {
-    for (const ip of testIps) {
-      expect(instance.binarySearchSync(ip)).toMatchSnapshot();
-    }
-  });
-
-  test('memorySearchSync query', () => {
-    for (const ip of testIps) {
-      expect(instance.memorySearchSync(ip)).toMatchSnapshot();
-    }
-  });
-
-  //#region callBack
-  test('binarySearch query', (done) => {
-    asyncFor(testIps,
-      (value, continueCallBack) => {
-        instance.binarySearch(value, (err, result) => {
-          expect(err).toBe(null);
-          expect(result).toMatchSnapshot();
-          continueCallBack();
-        });
-      },
-      () => { done() });
-  });
-
-  test('btreeSearch query', (done) => {
-    asyncFor(testIps,
-      (value, continueCallBack) => {
-        instance.btreeSearch(value, (err, result) => {
-          expect(err).toBe(null);
-          expect(result).toMatchSnapshot();
-          continueCallBack();
-        });
-      },
-      () => { done() });
-  });
-
-  test('memorySearch query', (done) => {
-    asyncFor(testIps,
-      (value, continueCallBack) => {
-        instance.memorySearch(value, (err, result) => {
-          expect(err).toBe(null);
-          expect(result).toMatchSnapshot();
-          continueCallBack();
-        });
-      },
-      () => { done() });
-  });
-
-  //#endregion
-
-  //#region Async Promisify test
-  const node_ver = require('../utils/fetchMainVersion');
-
-  // If we have Nodejs >= 8, we now support `async` and `await`
-  if (node_ver >= 8) {
-
-    const asyncBinarySearch = async (ip) => {
-
-      return new Promise((resolve, reject) => {
-        instance.binarySearch(ip, (err, result) => {
-          if (err) {
-            reject(err);
-          }
-          else {
-            resolve(result);
-          }
-        });
-      });
-
-    };
-
-    const asyncBtreeSearch = async (ip) => {
-
-      return new Promise((resolve, reject) => {
-        instance.btreeSearch(ip, (err, result) => {
-          if (err) {
-            reject(err);
-          }
-          else {
-            resolve(result);
-          }
-        });
-      });
-
-    };
-
-    const asyncMemorySearch = async (ip) => {
-      return new Promise((succ, fail) => {
-        instance.memorySearch(ip, (err, result) => {
-          if (err) {
-            fail(err);
-          }
-          else {
-            succ(result);
-          }
-        });
-      });
-    }
-    
-    test('async binarySearch query', async () => {
-      for (let i = 0; i < testIps.length; ++i) {
-        const result = await asyncBinarySearch(testIps[i]);
-        expect(result).toMatchSnapshot();
-      }
-    });
-
-    test('async btreeSearch query', async () => {
-      for (let i = 0; i < testIps.length; ++i) {
-        const result = await asyncBtreeSearch(testIps[i]);
-        expect(result).toMatchSnapshot();
-      }
-    });
-
-    test('async memorySearch query', async () => {
-      for (let i = 0; i < testIps.length; ++i) {
-        const result = await asyncMemorySearch(testIps[i]);
-        expect(result).toMatchSnapshot();
-      }
-    });
-  }
-  //#endregion
-});
--- a/binding/nodejs/tests/unitTests/createTest.spec.js
+++ b/binding/nodejs/tests/unitTests/createTest.spec.js
@ -1,146 +0,0 @@
-// This test is used for tesing of a static function `create` of IP2Region
-const IP2Region = require('../../ip2region');
-const testIps = require('../utils/testData');
-const asyncFor = require('../utils/asyncFor');
-
-describe('Create Test', () => {
-  let instance;
-
-  beforeAll(() => {
-    instance = IP2Region.create('../../data/ip2region.db');
-  });
-
-  afterAll(() => {
-    IP2Region.destroy();
-  });
-
-  test('btreeSearchSync query', () => {
-    for (const ip of testIps) {
-      expect(instance.btreeSearchSync(ip)).toMatchSnapshot();
-    }
-  });
-
-  test('binarySearchSync query', () => {
-    for (const ip of testIps) {
-      expect(instance.binarySearchSync(ip)).toMatchSnapshot();
-    }
-  });
-
-  test('memorySearchSync query', () => {
-    for (const ip of testIps) {
-      expect(instance.memorySearchSync(ip)).toMatchSnapshot();
-    }
-  });
-
-  //#region callBack
-  test('binarySearch query', (done) => {
-    asyncFor(testIps,
-      (value, continueCallBack) => {
-        instance.binarySearch(value, (err, result) => {
-          expect(err).toBe(null);
-          expect(result).toMatchSnapshot();
-          continueCallBack();
-        });
-      },
-      () => { done() });
-  });
-
-  test('btreeSearch query', (done) => {
-    asyncFor(testIps,
-      (value, continueCallBack) => {
-        instance.btreeSearch(value, (err, result) => {
-          expect(err).toBe(null);
-          expect(result).toMatchSnapshot();
-          continueCallBack();
-        });
-      },
-      () => { done() });
-  });
-
-  test('memorySearch query', (done) => {
-    asyncFor(testIps,
-      (value, continueCallBack) => {
-        instance.memorySearch(value, (err, result) => {
-          expect(err).toBe(null);
-          expect(result).toMatchSnapshot();
-          continueCallBack();
-        });
-      },
-      () => { done() });
-  });
-
-
-  //#endregion
-
-  //#region Async Promisify test
-  const node_ver = require('../utils/fetchMainVersion');
-
-  // If we have Nodejs >= 8, we now support `async` and `await`
-  if (node_ver >= 8) {
-
-    const asyncBinarySearch = async (ip) => {
-
-      return new Promise((resolve, reject) => {
-        instance.binarySearch(ip, (err, result) => {
-          if (err) {
-            reject(err);
-          }
-          else {
-            resolve(result);
-          }
-        });
-      });
-
-    };
-
-    const asyncBtreeSearch = async (ip) => {
-
-      return new Promise((resolve, reject) => {
-        instance.btreeSearch(ip, (err, result) => {
-          if (err) {
-            reject(err);
-          }
-          else {
-            resolve(result);
-          }
-        });
-      });
-
-    };
-
-    const asyncMemorySearch = async (ip) => {
-      return new Promise((succ, fail) => {
-        instance.memorySearch(ip, (err, result) => {
-          if (err) {
-            fail(err);
-          }
-          else {
-            succ(result);
-          }
-        });
-      });
-    }
-
-    test('async binarySearch query', async () => {
-      for (let i = 0; i < testIps.length; ++i) {
-        const result = await asyncBinarySearch(testIps[i]);
-        expect(result).toMatchSnapshot();
-      }
-    });
-
-    test('async btreeSearch query', async () => {
-      for (let i = 0; i < testIps.length; ++i) {
-        const result = await asyncBtreeSearch(testIps[i]);
-        expect(result).toMatchSnapshot();
-      }
-    });
-
-    test('async memorySearch query', async () => {
-      for (let i = 0; i < testIps.length; ++i) {
-        const result = await asyncMemorySearch(testIps[i]);
-        expect(result).toMatchSnapshot();
-      }
-    });
-  }
-  //#endregion
-});
--- a/binding/nodejs/tests/unitTests/exceptionTest.spec.js
+++ b/binding/nodejs/tests/unitTests/exceptionTest.spec.js
@ -1,28 +0,0 @@
-// This test is used for tesing of exceptions
-
-const IP2Region = require('../../ip2region');
-
-describe('Constructor Test', () => {
-  let instance;
-
-  beforeAll(() => {
-    instance = new IP2Region({ dbPath: '../../data/ip2region.db' })
-  });
-
-  afterAll(() => {
-    instance.destroy();
-  });
-
-  test('IP invalid test', () => {
-    const invalidIps = ['255.234.233', '255.255.-1.255', null, undefined, '', 'x.255.y.200'];
-    for (const ip of invalidIps) {
-      expect(() => instance.btreeSearchSync(ip)).toThrow();
-      expect(() => instance.binarySearchSync(ip)).toThrow();
-    }
-  });
-
-  test('File Not Found test', () => {
-    expect(() => new IP2Region({ dbPath: 'A Bad File or Path Here' })).toThrow();
-  });
-
-});
--- a/binding/nodejs/tests/utils/asyncFor.js
+++ b/binding/nodejs/tests/utils/asyncFor.js
@ -1,23 +0,0 @@
-/**
- * Async For
- * @param {Array} groupArray 
- * @param {Function} exeCallBack 
- * @param {Function} finalCallBack 
- */
-function asyncFor(groupArray, exeCallBack, finalCallBack) {
-
-    let i = 0;
-
-    function _innerAsyncLoop() {
-        if (i < groupArray.length) {
-            exeCallBack(groupArray[i++], _innerAsyncLoop);
-        }
-        else {
-            finalCallBack();
-        }
-    }
-
-    _innerAsyncLoop();
-}
-
-module.exports = asyncFor;
--- a/binding/nodejs/tests/utils/fetchMainVersion.js
+++ b/binding/nodejs/tests/utils/fetchMainVersion.js
@ -1,9 +0,0 @@
-let node_ver = process.version
-// Because nodejs's version is something like `v8.11.3`. So we should ignore `v` first
-node_ver = node_ver.substr(1);
-// Splitted by `.`
-node_ver = node_ver.split('.');
-// Take the main version number
-node_ver = parseInt(node_ver[0]);
-
-module.exports = node_ver;
--- a/binding/nodejs/tests/utils/testData.js
+++ b/binding/nodejs/tests/utils/testData.js
@ -1,16 +0,0 @@
-module.exports = [
-    '0.0.0.0',
-    '10.10.10.10',
-    '210.109.255.230',
-    '192.168.0.1',
-    '255.255.255.255',
-    '77.49.66.88',
-    '210.248.255.231',
-    '35.193.251.120',
-    '197.84.60.202',
-    '183.196.233.159',
-    '20.108.91.101',
-    '120.196.148.137',
-    '249.255.250.200',
-    '112.65.1.130'
-]
--- a/binding/nodejs/yarn.lock
+++ b/binding/nodejs/yarn.lock
--- a/binding/php/Ip2Region.class.php
+++ b/binding/php/Ip2Region.class.php
@ -1,360 +0,0 @@
-<?php
-/**
- * ip2region php seacher client class
- *
- * @author  chenxin<chenxin619315@gmail.com>
- * @date    2015-10-29
-*/
-
-defined('INDEX_BLOCK_LENGTH')   or define('INDEX_BLOCK_LENGTH',  12);
-defined('TOTAL_HEADER_LENGTH')  or define('TOTAL_HEADER_LENGTH', 8192);
-
-class Ip2Region 
-{
-    /**
-     * db file handler
-    */
-    private $dbFileHandler = NULL;
-
-    /**
-     * header block info
-    */
-    private $HeaderSip    = NULL;
-    private $HeaderPtr    = NULL;
-    private $headerLen  = 0;
-
-    /**
-     * super block index info
-    */
-    private $firstIndexPtr = 0;
-    private $lastIndexPtr  = 0;
-    private $totalBlocks   = 0;
-
-    /**
-     * for memory mode only
-     *  the original db binary string
-    */
-    private $dbBinStr = NULL;
-    private $dbFile = NULL;
-    
-    /**
-     * construct method
-     *
-     * @param   ip2regionFile
-    */
-    public function __construct( $ip2regionFile)
-    {
-        $this->dbFile = $ip2regionFile;
-    }
-
-    /**
-     * all the db binary string will be loaded into memory
-     * then search the memory only and this will a lot faster than disk base search
-     * @Note: 
-     * invoke it once before put it to public invoke could make it thread safe
-     *
-     * @param   $ip
-    */
-    public function memorySearch($ip)
-    {
-        //check and load the binary string for the first time
-        if ( $this->dbBinStr == NULL ) {
-            $this->dbBinStr = file_get_contents($this->dbFile);
-            if ( $this->dbBinStr == false ) {
-                throw new Exception("Fail to open the db file {$this->dbFile}");
-            }
-
-            $this->firstIndexPtr = self::getLong($this->dbBinStr, 0);
-            $this->lastIndexPtr  = self::getLong($this->dbBinStr, 4);
-            $this->totalBlocks   = ($this->lastIndexPtr-$this->firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
-        }
-
-        if ( is_string($ip) ) $ip = self::safeIp2long($ip);
-
-        //binary search to define the data
-        $l = 0;
-        $h = $this->totalBlocks;
-        $dataPtr = 0;
-        while ( $l <= $h ) {
-            $m = (($l + $h) >> 1);
-            $p = $this->firstIndexPtr + $m * INDEX_BLOCK_LENGTH;
-            $sip = self::getLong($this->dbBinStr, $p);
-            if ( $ip < $sip ) {
-                $h = $m - 1;
-            } else {
-                $eip = self::getLong($this->dbBinStr, $p + 4);
-                if ( $ip > $eip ) {
-                    $l = $m + 1;
-                } else {
-                    $dataPtr = self::getLong($this->dbBinStr, $p + 8);
-                    break;
-                }
-            }
-        }
-
-        //not matched just stop it here
-        if ( $dataPtr == 0 ) return NULL;
-
-        //get the data
-        $dataLen = (($dataPtr >> 24) & 0xFF);
-        $dataPtr = ($dataPtr & 0x00FFFFFF);
-
-        return array(
-            'city_id' => self::getLong($this->dbBinStr, $dataPtr), 
-            'region'  => substr($this->dbBinStr, $dataPtr + 4, $dataLen - 4)
-        );
-    }
-
-    /**
-     * get the data block through the specified ip address or long ip numeric with binary search algorithm
-     *
-     * @param    ip
-     * @return    mixed Array or NULL for any error
-    */
-    public function binarySearch( $ip )
-    {
-        //check and conver the ip address
-        if ( is_string($ip) ) $ip = self::safeIp2long($ip);
-        if ( $this->totalBlocks == 0 ) {
-            //check and open the original db file
-            if ( $this->dbFileHandler == NULL ) {
-                $this->dbFileHandler = fopen($this->dbFile, 'r');
-                if ( $this->dbFileHandler == false ) {
-                    throw new Exception("Fail to open the db file {$this->dbFile}");
-                }
-            }
-
-            fseek($this->dbFileHandler, 0);
-            $superBlock = fread($this->dbFileHandler, 8);
-
-            $this->firstIndexPtr = self::getLong($superBlock, 0);
-            $this->lastIndexPtr  = self::getLong($superBlock, 4);
-            $this->totalBlocks   = ($this->lastIndexPtr-$this->firstIndexPtr)/INDEX_BLOCK_LENGTH + 1;
-        }
-
-        //binary search to define the data
-        $l = 0;
-        $h = $this->totalBlocks;
-        $dataPtr = 0;
-        while ( $l <= $h ) {
-            $m = (($l + $h) >> 1);
-            $p = $m * INDEX_BLOCK_LENGTH;
-
-            fseek($this->dbFileHandler, $this->firstIndexPtr + $p);
-            $buffer = fread($this->dbFileHandler, INDEX_BLOCK_LENGTH);
-            $sip    = self::getLong($buffer, 0);
-            if ( $ip < $sip ) {
-                $h = $m - 1;
-            } else {
-                $eip = self::getLong($buffer, 4);
-                if ( $ip > $eip ) {
-                    $l = $m + 1;
-                } else {
-                    $dataPtr = self::getLong($buffer, 8);
-                    break;
-                }
-            }
-        }
-
-        //not matched just stop it here
-        if ( $dataPtr == 0 ) return NULL;
-
-
-        //get the data
-        $dataLen = (($dataPtr >> 24) & 0xFF);
-        $dataPtr = ($dataPtr & 0x00FFFFFF);
-
-        fseek($this->dbFileHandler, $dataPtr);
-        $data = fread($this->dbFileHandler, $dataLen);
-
-        return array(
-            'city_id' => self::getLong($data, 0), 
-            'region'  => substr($data, 4)
-        );
-    }
-
-    /**
-     * get the data block associated with the specified ip with b-tree search algorithm
-     * @Note: not thread safe
-     *
-     * @param   ip
-     * @return  Mixed Array for NULL for any error
-    */
-    public function btreeSearch( $ip )
-    {
-        if ( is_string($ip) ) $ip = self::safeIp2long($ip);
-
-        //check and load the header
-        if ( $this->HeaderSip == NULL ) {
-            //check and open the original db file
-            if ( $this->dbFileHandler == NULL ) {
-                $this->dbFileHandler = fopen($this->dbFile, 'r');
-                if ( $this->dbFileHandler == false ) {
-                    throw new Exception("Fail to open the db file {$this->dbFile}");
-                }
-            }
-
-            fseek($this->dbFileHandler, 8);
-            $buffer = fread($this->dbFileHandler, TOTAL_HEADER_LENGTH);
-            
-            //fill the header
-            $idx = 0;
-            $this->HeaderSip = array();
-            $this->HeaderPtr = array();
-            for ( $i = 0; $i < TOTAL_HEADER_LENGTH; $i += 8 ) {
-                $startIp = self::getLong($buffer, $i);
-                $dataPtr = self::getLong($buffer, $i + 4);
-                if ( $dataPtr == 0 ) break;
-
-                $this->HeaderSip[] = $startIp;
-                $this->HeaderPtr[] = $dataPtr;
-                $idx++;
-            }
-
-            $this->headerLen = $idx;
-        }
-        
-        //1. define the index block with the binary search
-        $l = 0; $h = $this->headerLen; $sptr = 0; $eptr = 0;
-        while ( $l <= $h ) {
-            $m = (($l + $h) >> 1);
-            
-            //perfetc matched, just return it
-            if ( $ip == $this->HeaderSip[$m] ) {
-                if ( $m > 0 ) {
-                    $sptr = $this->HeaderPtr[$m-1];
-                    $eptr = $this->HeaderPtr[$m  ];
-                } else {
-                    $sptr = $this->HeaderPtr[$m ];
-                    $eptr = $this->HeaderPtr[$m+1];
-                }
-                
-                break;
-            }
-            
-            //less then the middle value
-            if ( $ip < $this->HeaderSip[$m] ) {
-                if ( $m == 0 ) {
-                    $sptr = $this->HeaderPtr[$m  ];
-                    $eptr = $this->HeaderPtr[$m+1];
-                    break;
-                } else if ( $ip > $this->HeaderSip[$m-1] ) {
-                    $sptr = $this->HeaderPtr[$m-1];
-                    $eptr = $this->HeaderPtr[$m  ];
-                    break;
-                }
-                $h = $m - 1;
-            } else {
-                if ( $m == $this->headerLen - 1 ) {
-                    $sptr = $this->HeaderPtr[$m-1];
-                    $eptr = $this->HeaderPtr[$m  ];
-                    break;
-                } else if ( $ip <= $this->HeaderSip[$m+1] ) {
-                    $sptr = $this->HeaderPtr[$m  ];
-                    $eptr = $this->HeaderPtr[$m+1];
-                    break;
-                }
-                $l = $m + 1;
-            }
-        }
-        
-        //match nothing just stop it
-        if ( $sptr == 0 ) return NULL;
-        
-        //2. search the index blocks to define the data
-        $blockLen = $eptr - $sptr;
-        fseek($this->dbFileHandler, $sptr);
-        $index = fread($this->dbFileHandler, $blockLen + INDEX_BLOCK_LENGTH);
-        
-        $dataPtr = 0;
-        $l = 0; $h = $blockLen / INDEX_BLOCK_LENGTH;
-        while ( $l <= $h ) {
-            $m = (($l + $h) >> 1);
-            $p = (int)($m * INDEX_BLOCK_LENGTH);
-            $sip = self::getLong($index, $p);
-            if ( $ip < $sip ) {
-                $h = $m - 1;
-            } else {
-                $eip = self::getLong($index, $p + 4);
-                if ( $ip > $eip ) {
-                    $l = $m + 1;
-                } else {
-                    $dataPtr = self::getLong($index, $p + 8);
-                    break;
-                }
-            }
-        }
-        
-        //not matched
-        if ( $dataPtr == 0 ) return NULL;
-        
-        //3. get the data
-        $dataLen = (($dataPtr >> 24) & 0xFF);
-        $dataPtr = ($dataPtr & 0x00FFFFFF);
-        
-        fseek($this->dbFileHandler, $dataPtr);
-        $data = fread($this->dbFileHandler, $dataLen);
-
-        return array(
-            'city_id' => self::getLong($data, 0), 
-            'region'  => substr($data, 4)
-        );
-    }
-
-
-    /**
-     * safe self::safeIp2long function 
-     *
-     * @param ip 
-     * */
-    public static function safeIp2long($ip) 
-    {
-        $ip = ip2long($ip);
-
-        // convert signed int to unsigned int if on 32 bit operating system
-        if ($ip < 0 && PHP_INT_SIZE == 4) {
-            $ip = sprintf("%u", $ip);
-        } 
-
-        return $ip;
-    }
-
-
-
-    /**
-     * read a long from a byte buffer
-     *
-     * @param    b
-     * @param    offset
-    */
-    public static function getLong( $b, $offset )
-    {
-        $val =  (
-            (ord($b[$offset++]))        | 
-            (ord($b[$offset++]) << 8)   | 
-            (ord($b[$offset++]) << 16)  | 
-            (ord($b[$offset  ]) << 24)
-        );
-
-        // convert signed int to unsigned int if on 32 bit operating system
-        if ($val < 0 && PHP_INT_SIZE == 4) {
-            $val = sprintf("%u", $val);
-        } 
-
-        return $val;
-    }
-
-    /**
-     * destruct method, resource destroy
-    */
-    public function __destruct()
-    {
-        if ( $this->dbFileHandler != NULL ) {
-            fclose($this->dbFileHandler);
-        }
-
-        $this->dbBinStr  = NULL;
-        $this->HeaderSip = NULL;
-        $this->HeaderPtr = NULL;
-    }
-}
--- a/binding/php/testSearcher.php
+++ b/binding/php/testSearcher.php
@ -1,66 +0,0 @@
-<?php
-/**
- * Ip2Region php client test script
- *
- * @author    chenxin<chenxin619315@gmail.com>
-*/
-
-if ( $argc < 2 ) {
-    $usage = <<<EOF
-Usage: php Test.php [ip2region db file] [alrogrithm]
-+-Optional Algorithm: binary, b-tree, memory\n
-EOF;
-    exit($usage);
-}
-
-array_shift($argv);
-$dbFile     = $argv[0];
-$method     = 'btreeSearch';
-$algorithm  = 'B-tree';
-if ( isset($argv[1]) ) {
-    switch ( strtolower($argv[1]) ) {
-    case 'binary':
-        $algorithm = 'Binary';
-        $method    = 'binarySearch';
-        break;
-    case 'memory':
-        $algorithm = 'Memory';
-        $method    = 'memorySearch';
-        break;
-    }
-}
-
-require dirname(__FILE__) . '/Ip2Region.class.php';
-$ip2regionObj = new Ip2Region($dbFile);
-
-$initStr = <<<INIT
-initializing  {$algorithm} ... 
-+----------------------------------+
-| ip2region test script            |
-| Author: chenxin619315@gmail.com  |
-| Type 'quit' to exit program      |
-+----------------------------------+
-INIT;
-echo $initStr, "\n";
-
-while ( true ) {
-    echo "ip2region>> ";
-    $line = trim(fgets(STDIN));
-    if ( strlen($line) < 2 ) continue;
-    if ( $line == 'quit'  ) break;
-    if ( ip2long($line) == NULL ) {
-        echo "Error: invalid ip address\n";
-        continue;
-    }
-
-    $s_time = getTime();
-    $data   = $ip2regionObj->{$method}($line);
-    $c_time = getTime() - $s_time;
-    printf("%s|%s in %.5f millseconds\n", $data['city_id'], $data['region'], $c_time);
-}
-
-function getTime()
-{
-    return (microtime(true) * 1000);
-}
-?>
--- a/binding/php5_ext/.gitignore
+++ b/binding/php5_ext/.gitignore
@ -1,37 +0,0 @@
-.deps
-*.lo
-*.la
-*.swp
-*~
-.libs
-acinclude.m4
-aclocal.m4
-autom4te.cache
-build
-config.guess
-config.h
-config.h.in
-config.log
-config.nice
-config.status
-config.sub
-configure
-configure.in
-include
-install-sh
-libtool
-ltmain.sh
-Makefile
-Makefile.fragments
-Makefile.global
-Makefile.objects
-missing
-mkinstalldirs
-modules
-run-tests.php
-tests/*/*.diff
-tests/*/*.out
-tests/*/*.php
-tests/*/*.exp
-tests/*/*.log
-tests/*/*.sh
--- a/binding/php5_ext/CREDITS
+++ b/binding/php5_ext/CREDITS
@ -1,2 +0,0 @@
-ip2region
-
--- a/binding/php5_ext/README.md
+++ b/binding/php5_ext/README.md
@ -1,29 +0,0 @@
-# ip2region client - PHP扩展(php5版本) 
-
-### 安装步骤
-* git clone https://github.com/lionsoul2014/ip2region.git
-* cd ip2region
-* cp binding/php5_ext 到 php source code 的 ext/ip2region 目录下
-* cp binding/c/ 里面所有的文件到 php source code 的 ext/ip2region/lib 目录下
-* 在 ext/ip2region 下，运行 
-
-        phpize
-        ./configure
-        make && sudo make install
-
-* 配置 ip2region.ini 指定 db_file 路径，(cli/fpm)
-    
-        extension=ip2region.so
-        ip2region.db_file=/path/to/ip2region.db
-
-默认 ip2region.db 在项目根目录下的 data 文件夹下，如有改动，请修改 ip2region.ini 的 db_file
-
-* 测试 
-
-在 ext/ip2region/ 下运行
-    
-        php ip2region.php
-
-### 使用
-
-参考当前目录下的 ip2region.php
--- a/binding/php5_ext/config.m4
+++ b/binding/php5_ext/config.m4
@ -1,63 +0,0 @@
-dnl $Id$
-dnl config.m4 for extension ip2region
-
-dnl Comments in this file start with the string 'dnl'.
-dnl Remove where necessary. This file will not work
-dnl without editing.
-
-dnl If your extension references something external, use with:
-
-dnl  PHP_ARG_WITH(ip2region, for ip2region support,
-dnl Make sure that the comment is aligned:
-dnl [  --with-ip2region             Include ip2region support])
-
-dnl Otherwise use enable:
-
-PHP_ARG_ENABLE(ip2region, whether to enable ip2region support,
-Make sure that the comment is aligned:
-[  --enable-ip2region           Enable ip2region support])
-
-if test "$PHP_IP2REGION" != "no"; then
-dnl   dnl Write more examples of tests here...
-dnl 
-dnl   dnl # --with-ip2region -> check with-path
-dnl    SEARCH_PATH="/home/slayer/code/php-5.6.7/ext/ip2region/lib "     # you might want to change this
-dnl    SEARCH_FOR="ip2region.h"  # you most likely want to change this
-dnl    if test -r $PHP_IP2REGION/$SEARCH_FOR; then # path given as parameter
-dnl      IP2REGION_DIR=$PHP_IP2REGION
-dnl    else # search default path list
-dnl      AC_MSG_CHECKING([for ip2region files in default path])
-dnl      for i in $SEARCH_PATH ; do
-dnl        if test -r $i/$SEARCH_FOR; then
-dnl          IP2REGION_DIR=$i
-dnl          AC_MSG_RESULT(found in $i)
-dnl        fi
-dnl      done
-dnl    fi
-dnl   
-dnl    if test -z "$IP2REGION_DIR"; then
-dnl      AC_MSG_RESULT([not found])
-dnl      AC_MSG_ERROR([Please reinstall the ip2region distribution])
-dnl    fi
-dnl 
-dnl    dnl # --with-ip2region -> add include path
-dnl    PHP_ADD_INCLUDE($IP2REGION_DIR/include)
-dnl 
-dnl    dnl # --with-ip2region -> check for lib and symbol presence
-dnl    LIBNAME=ip2region # you may want to change this
-dnl    LIBSYMBOL=ip2region # you most likely want to change this 
-dnl 
-dnl    PHP_CHECK_LIBRARY($LIBNAME,$LIBSYMBOL,
-dnl    [
-dnl      PHP_ADD_LIBRARY_WITH_PATH($LIBNAME, $IP2REGION_DIR/$PHP_LIBDIR, IP2REGION_SHARED_LIBADD)
-dnl      AC_DEFINE(HAVE_IP2REGIONLIB,1,[ ])
-dnl    ],[
-dnl      AC_MSG_ERROR([wrong ip2region lib version or lib not found])
-dnl    ],[
-dnl      -L$IP2REGION_DIR/$PHP_LIBDIR -lm
-dnl    ])
-dnl   
-dnl    PHP_SUBST(IP2REGION_SHARED_LIBADD)
-dnl 
-     PHP_NEW_EXTENSION(ip2region, ip2region.c lib/ip2region.c , $ext_shared)
-fi
--- a/binding/php5_ext/config.w32
+++ b/binding/php5_ext/config.w32
@ -1,12 +0,0 @@
-// $Id$
-//
-// If your extension references something external, use ARG_WITH
-// ARG_WITH("ip2region", "for ip2region support", "no");
-
-// Otherwise, use ARG_ENABLE
-// ARG_ENABLE("ip2region", "enable ip2region support", "no");
-
-if (PHP_IP2REGION != "no") {
-	EXTENSION("ip2region", "ip2region.c");
-}
-
--- a/binding/php5_ext/ip2region.c
+++ b/binding/php5_ext/ip2region.c
@ -1,309 +0,0 @@
-/*
-  +----------------------------------------------------------------------+
-  | PHP Version 5                                                        |
-  +----------------------------------------------------------------------+
-  | Copyright (c) 1997-2015 The PHP Group                                |
-  +----------------------------------------------------------------------+
-  | This source file is subject to version 3.01 of the PHP license,      |
-  | that is bundled with this package in the file LICENSE, and is        |
-  | available through the world-wide-web at the following url:           |
-  | http://www.php.net/license/3_01.txt                                  |
-  | If you did not receive a copy of the PHP license and are unable to   |
-  | obtain it through the world-wide-web, please send a note to          |
-  | license@php.net so we can mail you a copy immediately.               |
-  +----------------------------------------------------------------------+
-  | Author: dongyado<dongyado@gmail.com>                                 |
-  +----------------------------------------------------------------------+
-*/
-
-/* $Id$ */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "php.h"
-#include "php_ini.h"
-#include "ext/standard/info.h"
-#include "lib/ip2region.h"
-#include "php_ip2region.h"
-#include <sys/time.h>
-
-ZEND_DECLARE_MODULE_GLOBALS(ip2region)
-
-/* True global resources - no need for thread safety here */
-static int le_ip2region;
-static ip2region_t      g_resource_ptr;
-static ip2region_entry  g_resource;
-
-// class
-static zend_class_entry *ip2region_class_entry_ptr;
-
-
-//static double getTime()
-//{
-//	struct timeval tv;
-//	struct timezone tz;
-//	gettimeofday(&tv, &tz);
-//
-//	return (tv.tv_sec * 1000 + ((double)tv.tv_usec)/1000);
-//}
-
-
-static void search(
-		ip2region_t g_resouce_ptr, 
-		uint_t (*func_ptr) (ip2region_t, uint_t, datablock_t), 
-		long ip, 
-		zval ** return_value, 
-		datablock_t _block)
-{
-	int res = 0;
-
-	if (g_resource_ptr != NULL){
-		res 	= (*func_ptr)(g_resouce_ptr, (uint_t) ip, _block);
-	}
-
-	array_init( *return_value );
-
-	if ( res == 1 )
-	{
-		add_assoc_long( *return_value,   "city_id", (*_block).city_id);
-		add_assoc_string( *return_value, "region", (*_block).region, 1);
-	} else {
-		add_assoc_long( *return_value,   "city_id", 0);
-		add_assoc_string( *return_value, "region", "[Error] Search Failed! Please check the  path of ip2region db file.", 1);
-	}
-}
-
-
-/* {{{ php_ip2region_init_globals
- */
-static void php_ip2region_init_globals(zend_ip2region_globals *ip2region_globals)
-{
-	ip2region_globals->db_file = NULL;
-}
-/* }}} */
-
-
-/* {{{ PHP_INI
- */
-PHP_INI_BEGIN()
-    STD_PHP_INI_ENTRY("ip2region.db_file", NULL, PHP_INI_ALL, OnUpdateString, db_file, zend_ip2region_globals, ip2region_globals)
-PHP_INI_END()
-/* }}} */
-
-
-/* {{{ 
- *  btree search string
- * */
-PHP_METHOD(ip2region_class_entry_ptr, btreeSearchString)
-{
-	char *ip = NULL;
-	int arg_len;
-	datablock_entry  _block;
-	uint_t (*func_ptr) (ip2region_t, uint_t, datablock_t);
-
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &ip, &arg_len) == FAILURE) {
-		return;
-	}
-
-	func_ptr = ip2region_btree_search;
-
-	search(g_resource_ptr, func_ptr, ip2long(ip), &return_value, &_block);
-}
-/* }}} */
-
-
-
-/* {{{ 
- *  btree search 
- * */
-PHP_METHOD(ip2region_class_entry_ptr, btreeSearch)
-{
-	long ip;
-	datablock_entry  _block;
-	uint_t (*func_ptr) (ip2region_t, uint_t, datablock_t);
-
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &ip) == FAILURE) {
-		return;
-	}
-
-	func_ptr = ip2region_btree_search;
-
-	search(g_resource_ptr, func_ptr, ip, &return_value, &_block);
-}
-/* }}} */
-
-
-/* {{{
- * binary search string
- * */
-PHP_METHOD(ip2region_class_entry_ptr,  binarySearchString)
-{
-	char *ip = NULL;
-	int arg_len;
-	datablock_entry  _block;
-	uint_t (*func_ptr) (ip2region_t, uint_t, datablock_t);
-
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &ip, &arg_len) == FAILURE) {
-		return;
-	}
-
-	func_ptr = ip2region_binary_search;
-
-	search(g_resource_ptr, func_ptr, ip2long(ip), &return_value, &_block);
-}
-/* }}} */
-
-
-/* {{{
- * binary search 
- * */
-PHP_METHOD(ip2region_class_entry_ptr,  binarySearch)
-{
-	long ip;
-	datablock_entry  _block;
-	uint_t (*func_ptr) (ip2region_t, uint_t, datablock_t);
-
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &ip) == FAILURE) {
-		return;
-	}
-
-	func_ptr = ip2region_binary_search;
-	search(g_resource_ptr, func_ptr, ip, &return_value, &_block);
-}
-/* }}} */
-
-
-
-
-/* {{{ PHP_MSHUTDOWN_FUNCTION
- */
-PHP_MSHUTDOWN_FUNCTION(ip2region)
-{
-	UNREGISTER_INI_ENTRIES();
-	if(g_resource_ptr != NULL) ip2region_destroy(&g_resource);
-	return SUCCESS;
-}
-/* }}} */
-
-
-/* Remove if there's nothing to do at request start */
-/* {{{ PHP_RINIT_FUNCTION
- */
-PHP_RINIT_FUNCTION(ip2region)
-{
-	return SUCCESS;
-}
-/* }}} */
-
-
-/* Remove if there's nothing to do at request end */
-/* {{{ PHP_RSHUTDOWN_FUNCTION
- */
-PHP_RSHUTDOWN_FUNCTION(ip2region)
-{
-	return SUCCESS;
-}
-/* }}} */
-
-
-/* {{{ PHP_MINFO_FUNCTION
- */
-PHP_MINFO_FUNCTION(ip2region)
-{
-	php_info_print_table_start();
-	php_info_print_table_header(2, "ip2region support", "enabled");
-	php_info_print_table_end();
-
-	DISPLAY_INI_ENTRIES();
-}
-/* }}} */
-
-
-/* {{{ ip2region_class_functions[]
- *
- * Every user visible function must have an entry in ip2region_functions[].
- */
-const zend_function_entry ip2region_class_functions[] = {
-	PHP_ME( ip2region_class_entry_ptr,  btreeSearchString,  NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
-	PHP_ME( ip2region_class_entry_ptr,  binarySearchString, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC )
-	PHP_ME( ip2region_class_entry_ptr,  btreeSearch,  NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
-	PHP_ME( ip2region_class_entry_ptr,  binarySearch, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC )
-	PHP_FE_END	/* Must be the last line in ip2region_functions[] */
-};
-/* }}} */
-
-
-/* {{{ ip2region_functions[]
- *
- * Every user visible function must have an entry in ip2region_functions[].
- */
-const zend_function_entry ip2region_functions[] = {
-	PHP_FE_END	/* Must be the last line in ip2region_functions[] */
-};
-/* }}} */
-
-
-/* {{{ PHP_MINIT_FUNCTION
- */
-PHP_MINIT_FUNCTION(ip2region)
-{
-	zend_class_entry ip2region_class_entry;
-
-	// @NOTE the line should before REGISTRE_INI_ENTRIES, 
-	// and should not comment it when you have glocbals 
-	ZEND_INIT_MODULE_GLOBALS(ip2region, php_ip2region_init_globals, NULL);  
-	REGISTER_INI_ENTRIES();
-
-	char* _db_file = IP2REGION_G(db_file);
-        if ( _db_file == NULL || ip2region_create( &g_resource, _db_file) == 0)
-	{
-		g_resource_ptr = NULL;
-	} else {
-		g_resource_ptr = &g_resource;
-	}
-
-
-	//le_ip2region = zend_register_list_destructors_ex(
-	//	ip2region_destruction_handler, NULL, le_ip2region_name, module_number);
-
-	// init class
-	INIT_CLASS_ENTRY( ip2region_class_entry, "ip2region", ip2region_class_functions);
-	ip2region_class_entry_ptr = 
-		zend_register_internal_class(&ip2region_class_entry TSRMLS_CC);
-
-	return SUCCESS;
-}
-/* }}} */
-
-
-/* {{{ ip2region_module_entry
- */
-zend_module_entry ip2region_module_entry = {
-	STANDARD_MODULE_HEADER,
-	"ip2region",
-	ip2region_functions,
-	PHP_MINIT(ip2region),
-	PHP_MSHUTDOWN(ip2region),
-	PHP_RINIT(ip2region),	
-	PHP_RSHUTDOWN(ip2region),
-	PHP_MINFO(ip2region),
-	PHP_IP2REGION_VERSION,
-	STANDARD_MODULE_PROPERTIES
-};
-/* }}} */
-
-
-#ifdef COMPILE_DL_IP2REGION
-ZEND_GET_MODULE(ip2region)
-#endif
-
-/*
- * Local variables:
- * tab-width: 4
- * c-basic-offset: 4
- * End:
- * vim600: noet sw=4 ts=4 fdm=marker
- * vim<600: noet sw=4 ts=4
- */
--- a/binding/php5_ext/ip2region.php
+++ b/binding/php5_ext/ip2region.php
@ -1,67 +0,0 @@
-<?php
-/**
- * test shell for ip2region for php
- *
- * */
-$br = (php_sapi_name() == "cli")? "":"<br>";
-
-if(!extension_loaded('ip2region')) {
-	dl('ip2region.' . PHP_SHLIB_SUFFIX);
-}
-
-function getTime(){
-    return microtime(true) * 1000;
-}
-
-// test class
-function classBtreeSearch( $ip)
-{
-
-    $start = getTime();
-    //$data  = $ip2region->btreeSearch($ip);
-    $data  = Ip2region::btreeSearchString($ip);
-    $end   = getTime();
-    var_dump($data);
-    echo " btree search string - taken: ", ($end - $start), "\n";
-
-    $start = getTime();
-    $data  = Ip2region:: btreeSearch(ip2long($ip));
-    $end   = getTime();
-    var_dump($data);
-    echo " btree search - taken: ", ($end - $start), "\n";
-}
-
-function classBinarySearch($ip)
-{
-
-    $start = getTime();
-    $data  = Ip2region::binarySearchString($ip);
-    $end   = getTime();
-    var_dump($data);
-    echo " binary search string -taken: ", ($end - $start), "\n";
-
-    $start = getTime();
-    $data  = Ip2region::binarySearch(ip2long($ip));
-    $end   = getTime();
-    var_dump($data);
-    echo " binary search - taken: ", ($end - $start), "\n";
-}
-
-
-function test(){
-    $v1 = rand(0,255);
-    $v2 = rand(0,255);
-    $v3 = rand(0,255);
-    $v4 = rand(0,255);
-    $ip = "{$v1}.{$v2}.{$v3}.{$v4}";
-    classBtreeSearch( $ip );
-    classBinarySearch( $ip );
-}
-
-while(true)
-{
-    test();
-    break;
-    usleep(5000);
-}
-?>
--- a/binding/php5_ext/lib/README.md
+++ b/binding/php5_ext/lib/README.md
@ -1,4 +0,0 @@
-这里放置 
-https://github.com/lionsoul2016/ip2region/tree/master/binding/c
-
-ip2region.c and ip2region.h
--- a/binding/php5_ext/php_ip2region.h
+++ b/binding/php5_ext/php_ip2region.h
@ -1,77 +0,0 @@
-/*
-  +----------------------------------------------------------------------+
-  | PHP Version 5                                                        |
-  +----------------------------------------------------------------------+
-  | Copyright (c) 1997-2015 The PHP Group                                |
-  +----------------------------------------------------------------------+
-  | This source file is subject to version 3.01 of the PHP license,      |
-  | that is bundled with this package in the file LICENSE, and is        |
-  | available through the world-wide-web at the following url:           |
-  | http://www.php.net/license/3_01.txt                                  |
-  | If you did not receive a copy of the PHP license and are unable to   |
-  | obtain it through the world-wide-web, please send a note to          |
-  | license@php.net so we can mail you a copy immediately.               |
-  +----------------------------------------------------------------------+
-  | Author:  dongyado<dongyado@gmail.com>                                |
-  +----------------------------------------------------------------------+
-*/
-
-/* $Id$ */
-
-#ifndef PHP_IP2REGION_H
-#define PHP_IP2REGION_H
-
-extern zend_module_entry ip2region_module_entry;
-#define phpext_ip2region_ptr &ip2region_module_entry
-
-#define PHP_IP2REGION_VERSION "0.1.0" /* Replace with version number for your extension */
-
-#ifdef PHP_WIN32
-#	define PHP_IP2REGION_API __declspec(dllexport)
-#elif defined(__GNUC__) && __GNUC__ >= 4
-#	define PHP_IP2REGION_API __attribute__ ((visibility("default")))
-#else
-#	define PHP_IP2REGION_API
-#endif
-
-#ifdef ZTS
-#include "TSRM.h"
-#endif
-
-
-
-ZEND_BEGIN_MODULE_GLOBALS(ip2region)
-	char *db_file;
-ZEND_END_MODULE_GLOBALS(ip2region)
-
-/* In every utility function you add that needs to use variables 
-   in php_ip2region_globals, call TSRMLS_FETCH(); after declaring other 
-   variables used by that function, or better yet, pass in TSRMLS_CC
-   after the last function argument and declare your utility function
-   with TSRMLS_DC after the last declared argument.  Always refer to
-   the globals in your function as IP2REGION_G(variable).  You are 
-   encouraged to rename these macros something shorter, see
-   examples in any other php module directory.
-*/
-
-#ifdef ZTS
-#define IP2REGION_G(v) TSRMG(ip2region_globals_id, zend_ip2region_globals *, v)
-#else
-#define IP2REGION_G(v) (ip2region_globals.v)
-#endif
-
-static void php_ip2region_init_globals(zend_ip2region_globals *);
-
-#define le_ip2region_name "Ip2region"
-
-
-
-#endif	/* PHP_IP2REGION_H */
-/*
- * Local variables:
- * tab-width: 4
- * c-basic-offset: 4
- * End:
- * vim600: noet sw=4 ts=4 fdm=marker
- * vim<600: noet sw=4 ts=4
- */
--- a/binding/php5_ext/tests/001.phpt
+++ b/binding/php5_ext/tests/001.phpt
@ -1,22 +0,0 @@
--TEST--
-Check for ip2region presence
--SKIPIF--
-<?php if (!extension_loaded("ip2region")) print "skip"; ?>
--FILE--
-<?php 
-echo "ip2region extension is available";
-/*
-	you can add regression tests for your extension here
-
-  the output of your test code has to be equal to the
-  text in the --EXPECT-- section below for the tests
-  to pass, differences between the output and the
-  expected text are interpreted as failure
-
-	see php5/README.TESTING for further information on
-  writing regression tests
-
-*/
-?>
--EXPECT--
-ip2region extension is available
--- a/binding/php7_ext/.gitignore
+++ b/binding/php7_ext/.gitignore
@ -1,37 +0,0 @@
-.deps
-*.lo
-*.la
-*.swp
-*~
-.libs
-acinclude.m4
-aclocal.m4
-autom4te.cache
-build
-config.guess
-config.h
-config.h.in
-config.log
-config.nice
-config.status
-config.sub
-configure
-configure.in
-include
-install-sh
-libtool
-ltmain.sh
-Makefile
-Makefile.fragments
-Makefile.global
-Makefile.objects
-missing
-mkinstalldirs
-modules
-run-tests.php
-tests/*/*.diff
-tests/*/*.out
-tests/*/*.php
-tests/*/*.exp
-tests/*/*.log
-tests/*/*.sh
--- a/binding/php7_ext/CREDITS
+++ b/binding/php7_ext/CREDITS
@ -1,2 +0,0 @@
-ip2region
-
--- a/binding/php7_ext/README.md
+++ b/binding/php7_ext/README.md
@ -1,29 +0,0 @@
-# ip2region client - PHP扩展(php7版本) 
-
-### 安装步骤
-* git clone https://github.com/lionsoul2014/ip2region.git
-* cd ip2region
-* cp binding/php7_ext 到 php source code 的 ext/ip2region 目录下
-* cp binding/c/ 里面所有的文件到 php source code 的 ext/ip2region/lib 目录下
-* 在 ext/ip2region 下，运行 
-
-        phpize
-        ./configure
-        make && sudo make install
-
-* 配置 ip2region.ini 指定 db_file 路径，(cli/fpm)
-    
-        extension=ip2region.so
-        ip2region.db_file=/path/to/ip2region.db
-
-默认 ip2region.db 在项目根目录下的 data 文件夹下，如有改动，请修改 ip2region.ini 的 db_file
-
-* 测试 
-
-在 ext/ip2region/ 下运行
-    
-        php ip2region.php
-
-### 使用
-
-参考当前目录下的 ip2region.php
--- a/binding/php7_ext/config.m4
+++ b/binding/php7_ext/config.m4
@ -1,63 +0,0 @@
-dnl $Id$
-dnl config.m4 for extension ip2region
-
-dnl Comments in this file start with the string 'dnl'.
-dnl Remove where necessary. This file will not work
-dnl without editing.
-
-dnl If your extension references something external, use with:
-
-dnl  PHP_ARG_WITH(ip2region, for ip2region support,
-dnl Make sure that the comment is aligned:
-dnl [  --with-ip2region             Include ip2region support])
-
-dnl Otherwise use enable:
-
-PHP_ARG_ENABLE(ip2region, whether to enable ip2region support,
-Make sure that the comment is aligned:
-[  --enable-ip2region           Enable ip2region support])
-
-if test "$PHP_IP2REGION" != "no"; then
-dnl   dnl Write more examples of tests here...
-dnl 
-dnl   dnl # --with-ip2region -> check with-path
-dnl    SEARCH_PATH="/home/slayer/code/php-5.6.7/ext/ip2region/lib "     # you might want to change this
-dnl    SEARCH_FOR="ip2region.h"  # you most likely want to change this
-dnl    if test -r $PHP_IP2REGION/$SEARCH_FOR; then # path given as parameter
-dnl      IP2REGION_DIR=$PHP_IP2REGION
-dnl    else # search default path list
-dnl      AC_MSG_CHECKING([for ip2region files in default path])
-dnl      for i in $SEARCH_PATH ; do
-dnl        if test -r $i/$SEARCH_FOR; then
-dnl          IP2REGION_DIR=$i
-dnl          AC_MSG_RESULT(found in $i)
-dnl        fi
-dnl      done
-dnl    fi
-dnl   
-dnl    if test -z "$IP2REGION_DIR"; then
-dnl      AC_MSG_RESULT([not found])
-dnl      AC_MSG_ERROR([Please reinstall the ip2region distribution])
-dnl    fi
-dnl 
-dnl    dnl # --with-ip2region -> add include path
-dnl    PHP_ADD_INCLUDE($IP2REGION_DIR/include)
-dnl 
-dnl    dnl # --with-ip2region -> check for lib and symbol presence
-dnl    LIBNAME=ip2region # you may want to change this
-dnl    LIBSYMBOL=ip2region # you most likely want to change this 
-dnl 
-dnl    PHP_CHECK_LIBRARY($LIBNAME,$LIBSYMBOL,
-dnl    [
-dnl      PHP_ADD_LIBRARY_WITH_PATH($LIBNAME, $IP2REGION_DIR/$PHP_LIBDIR, IP2REGION_SHARED_LIBADD)
-dnl      AC_DEFINE(HAVE_IP2REGIONLIB,1,[ ])
-dnl    ],[
-dnl      AC_MSG_ERROR([wrong ip2region lib version or lib not found])
-dnl    ],[
-dnl      -L$IP2REGION_DIR/$PHP_LIBDIR -lm
-dnl    ])
-dnl   
-dnl    PHP_SUBST(IP2REGION_SHARED_LIBADD)
-dnl 
-     PHP_NEW_EXTENSION(ip2region, ip2region.c lib/ip2region.c , $ext_shared)
-fi
--- a/binding/php7_ext/config.w32
+++ b/binding/php7_ext/config.w32
@ -1,12 +0,0 @@
-// $Id$
-//
-// If your extension references something external, use ARG_WITH
-// ARG_WITH("ip2region", "for ip2region support", "no");
-
-// Otherwise, use ARG_ENABLE
-// ARG_ENABLE("ip2region", "enable ip2region support", "no");
-
-if (PHP_IP2REGION != "no") {
-	EXTENSION("ip2region", "ip2region.c");
-}
-
--- a/Show More
+++ b/Show More