add a example

Cargo.toml

@@ -1,2 +1,2 @@
 [workspace]
-members = ["binding/rust"]
+members = ["binding/rust", "binding/rust/example"]

binding/rust/example/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "example"
+version = "0.1.0"
+authors = ["biluohc <biluohc@qq.com>"]
+
+[dependencies]
+
+[dependencies.ip2region]
+path = "../"
+# git = "https://github.com/lionsoul2014/ip2region"
+# git = "https://github.com/biluohc/ip2region"
+version = "*"
+features = ["lazy"]

binding/rust/example/src/main.rs

@@ -0,0 +1,58 @@
+extern crate ip2region;
+
+use ip2region::*;
+
+use std::env;
+use std::time::Instant;
+
+// cargo run --release ../../../data/ip2region.db
+
+static IPS: &'static [&'_ str] = &[
+    "117.136.105.202",
+    "47.95.47.253",
+    "127.0.0.1",
+    "10.0.0.1",
+    "1.1.1.1",
+];
+
+fn main() {
+    lazy();
+
+    overview();
+}
+
+fn lazy() {
+    for ip in IPS {
+        let start = Instant::now();
+        let res = memory_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("lazy__ {:06} microseconds: {:?}", end, res);
+    }
+}
+
+fn overview() {
+    let args = env::args().skip(1).collect::<Vec<String>>();
+    let db_path = &args[0];
+
+    let mut ip2 = Ip2Region::new(db_path).unwrap();
+    let ip2o = ip2.to_owned().unwrap();
+
+    for ip in IPS {
+        let start = Instant::now();
+        let res = ip2o.memory_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("memory {:06} microseconds: {:?}", end, res);
+
+        let start = Instant::now();
+        let res = ip2.binary_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("binary {:06} microseconds: {:?}", end, res);
+
+        let start = Instant::now();
+        let res = ip2.btree_search(ip);
+        let end = start.elapsed().subsec_micros();
+        println!("btree  {:06} microseconds: {:?}", end, res);
+
+        println!();
+    }
+}

binding/rust/readme.md

@@ -2,22 +2,33 @@
 
 ## 用法
 
-基本都在 `src/main.rs` 的 `overview` 函数里,
+都在 `src/example` 里
 
- 另外 `cargo doc --features lazy`可以看到所有`API`。
+另外 `cargo doc --features lazy` 可以看到所有 `API`。
 
-## `lazy` feature 直接把DB打包到二进制
+### 添加依赖
 
-复制下面的 toml 添加依赖即可使用，其 api 是 `memory_search`。
-
-只是目前 DB 足有3.2M，还是有些感人的。
+注意 `#` 是 toml格式的注释，文件前三行的 `path` 和 `git` 是引用包的方式，`path` 是按路径引用包，`git`  是按git项目地址，按实际情况选一个。
 
 ```toml
 [dependencies.ip2region]
 git = "https://github.com/lionsoul2014/ip2region"
 # git = "https://github.com/biluohc/ip2region"
+# path = "../"
 version = "*"
-features = ["lazy"]
+# features = ["lazy"]
 ```
 
+### 代码
+查看 `src/example/src/main.rs` 
+
+### `lazy` feature 把 DB 直接打包进二进制
+
+取消上面 toml 的 `# features = ["lazy"]` 行的注释即可使用，其 api 是 `memory_search`。
+
+只是目前 DB 足有3.2M，还是有些感人的。
+
+关键的一行是 `features = ["lazy"]` ，不需要则可以注释或者删掉。
+
+
 

binding/rust/src/lib.rs

@@ -11,12 +11,15 @@ mod db;
 mod error;
 pub use error::{Error, Result};
 mod owned;
+
+#[doc(hidden)]
+pub use db::DB_PATH;
+pub use owned::{OwnedIp2Region, OwnedIpInfo};
+
 #[cfg(feature = "lazy")]
 use db::DB_BYTES;
-pub use db::DB_PATH;
 #[cfg(feature = "lazy")]
 pub use owned::memory_search;
-pub use owned::{OwnedIp2Region, OwnedIpInfo};
 
 const INDEX_BLOCK_LENGTH: u32 = 12;
 const TOTAL_HEADER_LENGTH: usize = 8192;