mirror of
https://github.com/jerryscript-project/jerryscript.git
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7df87b7778
The pre-scanner now is able to track all variable declarations and produces a compressed stream which store this data for each function and catch block. When a function or catch block is parsed, this information is decoded and the appropriate variables are created. Furthermore a stack scope is created which contains the currently available local variables and their register or literal index. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
129 lines
3.0 KiB
C
129 lines
3.0 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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#include "common.h"
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#include "ecma-helpers.h"
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#if ENABLED (JERRY_PARSER)
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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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/**
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* Free literal.
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*/
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void
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util_free_literal (lexer_literal_t *literal_p) /**< literal */
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{
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if (literal_p->type == LEXER_IDENT_LITERAL
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|| literal_p->type == LEXER_STRING_LITERAL)
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{
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if (!(literal_p->status_flags & LEXER_FLAG_SOURCE_PTR))
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{
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jmem_heap_free_block ((void *) literal_p->u.char_p, literal_p->prop.length);
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}
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}
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else if ((literal_p->type == LEXER_FUNCTION_LITERAL)
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|| (literal_p->type == LEXER_REGEXP_LITERAL))
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{
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ecma_bytecode_deref (literal_p->u.bytecode_p);
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}
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} /* util_free_literal */
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#if ENABLED (JERRY_PARSER_DUMP_BYTE_CODE)
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/**
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* Debug utility to print a character sequence.
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*/
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static void
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util_print_chars (const uint8_t *char_p, /**< character pointer */
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size_t size) /**< size */
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{
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while (size > 0)
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{
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JERRY_DEBUG_MSG ("%c", *char_p++);
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size--;
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}
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} /* util_print_chars */
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/**
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* Debug utility to print a number.
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*/
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static void
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util_print_number (ecma_number_t num_p) /**< number to print */
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{
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lit_utf8_byte_t str_buf[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];
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lit_utf8_size_t str_size = ecma_number_to_utf8_string (num_p, str_buf, sizeof (str_buf));
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str_buf[str_size] = 0;
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JERRY_DEBUG_MSG ("%s", str_buf);
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} /* util_print_number */
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/**
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* Print literal.
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*/
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void
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util_print_literal (lexer_literal_t *literal_p) /**< literal */
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{
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if (literal_p->type == LEXER_IDENT_LITERAL)
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{
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JERRY_DEBUG_MSG ("ident(");
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util_print_chars (literal_p->u.char_p, literal_p->prop.length);
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}
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else if (literal_p->type == LEXER_FUNCTION_LITERAL)
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{
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JERRY_DEBUG_MSG ("function");
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return;
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}
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else if (literal_p->type == LEXER_STRING_LITERAL)
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{
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JERRY_DEBUG_MSG ("string(");
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util_print_chars (literal_p->u.char_p, literal_p->prop.length);
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}
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else if (literal_p->type == LEXER_NUMBER_LITERAL)
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{
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JERRY_DEBUG_MSG ("number(");
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util_print_number (ecma_get_number_from_value (literal_p->u.value));
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}
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else if (literal_p->type == LEXER_REGEXP_LITERAL)
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{
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JERRY_DEBUG_MSG ("regexp");
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return;
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}
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else
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{
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JERRY_DEBUG_MSG ("unknown");
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return;
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}
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JERRY_DEBUG_MSG (")");
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} /* util_print_literal */
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#endif /* ENABLED (JERRY_PARSER_DUMP_BYTE_CODE) */
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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 /* ENABLED (JERRY_PARSER) */
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