Compact Byte Code parser and executor for Jerry.
JerryScript-DCO-1.0-Signed-off-by: László Langó llango.u-szeged@partner.samsung.com JerryScript-DCO-1.0-Signed-off-by: Tamas Gergely tgergely.u-szeged@partner.samsung.com JerryScript-DCO-1.0-Signed-off-by: Zsolt Borbély zsborbely.u-szeged@partner.samsung.com JerryScript-DCO-1.0-Signed-off-by: Roland Takacs rtakacs.u-szeged@partner.samsung.com JerryScript-DCO-1.0-Signed-off-by: István Kádár ikadar@inf.u-szeged.hu JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
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Zoltan Herczeg
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/* Copyright 2015-2016 Samsung Electronics Co., Ltd.
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* Copyright 2015-2016 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 COMMON_H
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#define COMMON_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <setjmp.h>
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/** \addtogroup parser Parser
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* @{
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*
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* \addtogroup jsparser JavaScript
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* @{
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*
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* \addtogroup jsparser_utils Utility
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* @{
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*/
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#ifndef JERRY_NDEBUG
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#define PARSER_DEBUG
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#endif
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#ifndef JERRY_NDEBUG
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/* Note: This flag is independent from debug mode. */
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#define PARSER_DUMP_BYTE_CODE
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#endif
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#include "ecma-globals.h"
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#include "ecma-regexp-object.h"
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#include "lit-literal.h"
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#include "mem-heap.h"
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/* The utilites here are just for compiling purposes, JS
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* engines should have an optimized version for them. */
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/* Malloc functions. */
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#define PARSER_MALLOC(size) mem_heap_alloc_block (size, MEM_HEAP_ALLOC_LONG_TERM)
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#define PARSER_FREE(ptr) mem_heap_free_block ((void *) ptr)
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#define PARSER_MALLOC_LOCAL(size) mem_heap_alloc_block (size, MEM_HEAP_ALLOC_SHORT_TERM)
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#define PARSER_FREE_LOCAL(ptr) mem_heap_free_block (ptr)
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/* UTF character management. Only ASCII characters are
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* supported for simplicity. */
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int util_is_identifier_start (const uint8_t *);
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int util_is_identifier_part (const uint8_t *);
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int util_is_identifier_start_character (uint16_t);
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int util_is_identifier_part_character (uint16_t);
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size_t util_to_utf8_bytes (uint8_t *, uint16_t);
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size_t util_get_utf8_length (uint16_t);
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/* Immediate management. */
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/**
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* Literal types.
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*
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* The LEXER_UNUSED_LITERAL type is internal and
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* used for various purposes.
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*/
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typedef enum
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{
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LEXER_IDENT_LITERAL = 0, /**< identifier literal */
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LEXER_STRING_LITERAL = 1, /**< string literal */
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LEXER_NUMBER_LITERAL = 2, /**< number literal */
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LEXER_FUNCTION_LITERAL = 3, /**< function literal */
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LEXER_REGEXP_LITERAL = 4, /**< regexp literal */
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LEXER_UNUSED_LITERAL = 5, /**< unused literal, can only be
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used by the byte code generator. */
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} lexer_literal_type_t;
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/* Flags for status_flags. */
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/* Local identifier (var, function arg). */
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#define LEXER_FLAG_VAR 0x01
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/* This local identifier cannot be stored in register. */
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#define LEXER_FLAG_NO_REG_STORE 0x02
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/* This local identifier is initialized with a value. */
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#define LEXER_FLAG_INITIALIZED 0x04
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/* This local identifier has a reference to the function itself. */
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#define LEXER_FLAG_FUNCTION_NAME 0x08
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/* This local identifier is a function argument. */
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#define LEXER_FLAG_FUNCTION_ARGUMENT 0x10
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/* No space is allocated for this character literal. */
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#define LEXER_FLAG_SOURCE_PTR 0x20
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/* Initialize this variable after the byte code is freed. */
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#define LEXER_FLAG_LATE_INIT 0x40
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/**
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* Literal data.
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*/
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typedef struct
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{
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union
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{
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lit_cpointer_t value; /**< literal value (not processed by the parser) */
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const uint8_t *char_p; /**< character value */
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ecma_compiled_code_t *bytecode_p; /**< compiled function or regexp pointer */
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uint32_t source_data; /**< encoded source literal */
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} u;
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#ifdef PARSER_DUMP_BYTE_CODE
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struct
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#else
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union
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#endif
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{
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uint16_t length; /**< length of ident / string literal */
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uint16_t index; /**< real index during post processing */
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} prop;
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uint8_t type; /**< type of the literal */
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uint8_t status_flags; /**< status flags */
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} lexer_literal_t;
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void util_free_literal (lexer_literal_t *);
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#ifdef PARSER_DUMP_BYTE_CODE
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void util_print_literal (lexer_literal_t *);
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#endif /* PARSER_DUMP_BYTE_CODE */
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/* TRY/CATCH block */
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#define PARSER_TRY_CONTEXT(context_name) \
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jmp_buf context_name
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#define PARSER_THROW(context_name) \
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longjmp (context_name, 1);
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#define PARSER_TRY(context_name) \
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{ \
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if (!setjmp (context_name)) \
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{ \
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#define PARSER_CATCH \
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} \
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else \
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{
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#define PARSER_TRY_END \
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} \
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}
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/* Other */
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#define PARSER_INLINE inline
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#define PARSER_NOINLINE __attribute__ ((noinline))
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#endif /* !COMMON_H */
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