1 /* Copyright JS Foundation and other contributors, http://js.foundation 2 * 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef JERRY_SNAPSHOT_H 17 #define JERRY_SNAPSHOT_H 18 19 #include "ecma-globals.h" 20 21 /** 22 * Snapshot header 23 */ 24 typedef struct 25 { 26 /* The size of this structure is recommended to be divisible by 27 * uint32_t alignment. Otherwise some bytes after the header are wasted. */ 28 uint32_t magic; /**< four byte magic number */ 29 uint32_t version; /**< version number */ 30 uint32_t global_flags; /**< global configuration and feature flags */ 31 uint32_t lit_table_offset; /**< byte offset of the literal table */ 32 uint32_t number_of_funcs; /**< number of primary ECMAScript functions */ 33 uint32_t func_offsets[1]; /**< function offsets (lowest bit: global(0) or eval(1) context) */ 34 } jerry_snapshot_header_t; 35 36 /** 37 * Jerry snapshot magic marker. 38 */ 39 #define JERRY_SNAPSHOT_MAGIC (0x5952524Au) 40 41 /** 42 * Snapshot configuration flags. 43 */ 44 typedef enum 45 { 46 /* 8 bits are reserved for dynamic features */ 47 JERRY_SNAPSHOT_HAS_REGEX_LITERAL = (1u << 0), /**< byte code has regex literal */ 48 JERRY_SNAPSHOT_HAS_CLASS_LITERAL = (1u << 1), /**< byte code has class literal */ 49 /* 24 bits are reserved for compile time features */ 50 JERRY_SNAPSHOT_FOUR_BYTE_CPOINTER = (1u << 8) /**< deprecated, an unused placeholder now */ 51 } jerry_snapshot_global_flags_t; 52 53 #endif /* !JERRY_SNAPSHOT_H */ 54