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51e3c4455a
Direct strings are a new type of direct ecma-values (no memory allocation is needed for encoding them) in JerryScript. Currently magic strings, external magic strings and uint values are encoded as direct strings. The constant pool of JerryScript byte-code is changed to hold ecma-values rather than cpointers to support direct strings. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef JERRY_SNAPSHOT_H
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#define JERRY_SNAPSHOT_H
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#include "ecma-globals.h"
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/**
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* Snapshot header
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*/
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typedef struct
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{
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/* The size of this structure is recommended to be divisible by
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* uint32_t alignment. Otherwise some bytes after the header are wasted. */
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uint32_t magic; /**< four byte magic number */
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uint32_t version; /**< version number */
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uint32_t global_flags; /**< global configuration and feature flags */
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uint32_t lit_table_offset; /**< byte offset of the literal table */
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uint32_t number_of_funcs; /**< number of primary ECMAScript functions */
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uint32_t func_offsets[1]; /**< function offsets (lowest bit: global(0) or eval(1) context) */
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} jerry_snapshot_header_t;
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/**
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* Evaluate this function on the top of the scope chain.
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*/
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#define JERRY_SNAPSHOT_EVAL_CONTEXT 0x1u
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/**
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* Jerry snapshot magic marker.
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*/
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#define JERRY_SNAPSHOT_MAGIC (0x5952524Au)
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/**
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* Jerry snapshot format version.
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*/
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#define JERRY_SNAPSHOT_VERSION (9u)
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/**
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* Snapshot configuration flags.
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*/
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typedef enum
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{
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/* 8 bits are reserved for dynamic features */
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JERRY_SNAPSHOT_HAS_REGEX_LITERAL = (1u << 0), /**< byte code has regex literal */
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/* 24 bits are reserved for compile time features */
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JERRY_SNAPSHOT_FOUR_BYTE_CPOINTER = (1u << 8) /**< compressed pointers are four byte long */
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} jerry_snapshot_global_flags_t;
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#endif /* !JERRY_SNAPSHOT_H */
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