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https://github.com/jerryscript-project/jerryscript.git
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2c72bb1139
Move RegExp bytecode functions to a separate file. Optimize bytecode lenght on character matching. Implement a basic RegExp cache to optimize memory usage on duplicated RegExp in JS files. Also fix minor style issues and add missing comments. Improve existing comments. JerryScript-DCO-1.0-Signed-off-by: László Langó llango.u-szeged@partner.samsung.com
130 lines
4.7 KiB
C
130 lines
4.7 KiB
C
/* Copyright 2016 Samsung Electronics Co., Ltd.
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* Copyright 2016 University of Szeged.
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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 RE_BYTECODE_H
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#define RE_BYTECODE_H
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#ifndef CONFIG_ECMA_COMPACT_PROFILE_DISABLE_REGEXP_BUILTIN
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#include "ecma-globals.h"
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/** \addtogroup parser Parser
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* @{
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*
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* \addtogroup regexparser Regular expression
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* @{
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*
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* \addtogroup regexparser_bytecode Bytecode
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* @{
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*/
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/**
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* Size of the RegExp bytecode cache
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*/
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#define RE_CACHE_SIZE 8u
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/**
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* RegExp flags mask (first 10 bits are for reference count and the rest for the actual RegExp flags)
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*/
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#define RE_FLAGS_MASK 0x3F
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/**
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* RegExp opcodes
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*/
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typedef enum
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{
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RE_OP_EOF,
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/* Group opcode order is important, because RE_IS_CAPTURE_GROUP is based on it.
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* Change it carefully. Capture opcodes should be at first.
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*/
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RE_OP_CAPTURE_GROUP_START, /**< group start */
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RE_OP_CAPTURE_GREEDY_ZERO_GROUP_START, /**< greedy zero group start */
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RE_OP_CAPTURE_NON_GREEDY_ZERO_GROUP_START, /**< non-greedy zero group start */
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RE_OP_CAPTURE_GREEDY_GROUP_END, /**< greedy group end */
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RE_OP_CAPTURE_NON_GREEDY_GROUP_END, /**< non-greedy group end */
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RE_OP_NON_CAPTURE_GROUP_START, /**< non-capture group start */
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RE_OP_NON_CAPTURE_GREEDY_ZERO_GROUP_START, /**< non-capture greedy zero group start */
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RE_OP_NON_CAPTURE_NON_GREEDY_ZERO_GROUP_START, /**< non-capture non-greedy zero group start */
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RE_OP_NON_CAPTURE_GREEDY_GROUP_END, /**< non-capture greedy group end */
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RE_OP_NON_CAPTURE_NON_GREEDY_GROUP_END, /**< non-capture non-greedy group end */
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RE_OP_MATCH, /**< match */
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RE_OP_CHAR, /**< any character */
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RE_OP_SAVE_AT_START, /**< save at start */
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RE_OP_SAVE_AND_MATCH, /**< save and match */
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RE_OP_PERIOD, /**< "." */
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RE_OP_ALTERNATIVE, /**< "|" */
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RE_OP_GREEDY_ITERATOR, /**< greedy iterator */
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RE_OP_NON_GREEDY_ITERATOR, /**< non-greedy iterator */
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RE_OP_ASSERT_START, /**< "^" */
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RE_OP_ASSERT_END, /**< "$" */
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RE_OP_ASSERT_WORD_BOUNDARY, /**< "\b" */
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RE_OP_ASSERT_NOT_WORD_BOUNDARY, /**< "\B" */
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RE_OP_LOOKAHEAD_POS, /**< lookahead pos */
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RE_OP_LOOKAHEAD_NEG, /**< lookahead neg */
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RE_OP_BACKREFERENCE, /**< \[0..9] */
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RE_OP_CHAR_CLASS, /**< [ ] */
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RE_OP_INV_CHAR_CLASS /**< [^ ] */
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} re_opcode_t;
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/**
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* Compiled byte code data.
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*/
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typedef struct
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{
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uint16_t flags; /**< RegExp flags */
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mem_cpointer_t pattern_cp; /**< original RegExp pattern */
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uint32_t num_of_captures; /**< number of capturing brackets */
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uint32_t num_of_non_captures; /**< number of non capturing brackets */
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} re_compiled_code_t;
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/**
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* Context of RegExp bytecode container
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*/
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typedef struct
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{
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uint8_t *block_start_p; /**< start of bytecode block */
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uint8_t *block_end_p; /**< end of bytecode block */
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uint8_t *current_p; /**< current position in bytecode */
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} re_bytecode_ctx_t;
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re_opcode_t re_get_opcode (uint8_t **);
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ecma_char_t re_get_char (uint8_t **);
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uint32_t re_get_value (uint8_t **);
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uint32_t re_get_bytecode_length (re_bytecode_ctx_t *);
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void re_append_opcode (re_bytecode_ctx_t *, re_opcode_t);
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void re_append_u32 (re_bytecode_ctx_t *, uint32_t);
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void re_append_char (re_bytecode_ctx_t *, ecma_char_t);
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void re_append_jump_offset (re_bytecode_ctx_t *, uint32_t);
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void re_insert_opcode (re_bytecode_ctx_t *, uint32_t, re_opcode_t);
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void re_insert_u32 (re_bytecode_ctx_t *, uint32_t, uint32_t);
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void re_bytecode_list_insert (re_bytecode_ctx_t *, size_t, uint8_t *, size_t);
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#ifdef JERRY_ENABLE_LOG
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void re_dump_bytecode (re_bytecode_ctx_t *bc_ctx);
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#endif
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/**
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* @}
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* @}
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* @}
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*/
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#endif /* !CONFIG_ECMA_COMPACT_PROFILE_DISABLE_REGEXP_BUILTIN */
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#endif /* !RE_BYTECODE_H */
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