mirror of
https://github.com/jerryscript-project/jerryscript.git
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115 lines
3.0 KiB
C++
115 lines
3.0 KiB
C++
/* Copyright 2015 Samsung Electronics Co., Ltd.
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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 "lit-char-helpers.h"
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/**
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* Check if specified character is the newline character
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*
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* @return true - if the character is "<LF>" character according to ECMA-262 v5, Table 3,
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* false - otherwise.
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*/
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bool
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lit_char_is_new_line (ecma_char_t c) /**< code unit */
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{
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return (c == '\x0A');
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} /* lit_char_is_new_line */
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/**
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* Check if specified character the carriage return character
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*
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* @return true - if the character is "<CR>" character according to ECMA-262 v5, Table 3,
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* false - otherwise.
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*/
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bool
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lit_char_is_carriage_return (ecma_char_t c) /**< code unit */
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{
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return (c == '\x0D');
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} /* lit_char_is_carriage_return */
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/**
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* Check if specified character is one of LineTerminator (ECMA-262 v5, Table 3) characters
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*
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* @return true - if the character is one of LineTerminator characters,
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* false - otherwise.
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*/
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bool
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lit_char_is_line_terminator (ecma_char_t c) /**< code unit */
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{
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/* FIXME: Handle <LS> and <PS> (ECMA-262 v5, 7.3, Table 3) when Unicode would be supported */
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return (lit_char_is_carriage_return (c)
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|| lit_char_is_new_line (c));
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} /* lit_char_is_line_terminator */
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/**
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* Check if specified character is a word character (part of IsWordChar abstract operation)
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*
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* See also: ECMA-262 v5, 15.10.2.6 (IsWordChar)
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*
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* @return true - if the character is a word character
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* false - otherwise.
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*/
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bool
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lit_char_is_word_char (ecma_char_t c) /**< code unit */
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{
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if ((c >= 'a' && c <= 'z')
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|| (c >= 'A' && c <= 'Z')
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|| (c >= '0' && c <= '9')
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|| c == '_')
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{
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return true;
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}
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return false;
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} /* lit_char_is_word_char */
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/**
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* Convert a hex character to an unsigned integer
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*
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* @return digit value, corresponding to the hex char
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*/
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uint32_t
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lit_char_hex_to_int (ecma_char_t c) /**< code unit, corresponding to
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* one of [0-9A-Fa-f] characters */
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{
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switch (c)
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{
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case '0': return 0x0;
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case '1': return 0x1;
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case '2': return 0x2;
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case '3': return 0x3;
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case '4': return 0x4;
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case '5': return 0x5;
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case '6': return 0x6;
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case '7': return 0x7;
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case '8': return 0x8;
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case '9': return 0x9;
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case 'a':
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case 'A': return 0xA;
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case 'b':
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case 'B': return 0xB;
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case 'c':
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case 'C': return 0xC;
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case 'd':
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case 'D': return 0xD;
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case 'e':
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case 'E': return 0xE;
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case 'f':
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case 'F': return 0xF;
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default: JERRY_UNREACHABLE ();
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}
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} /* lit_char_hex_to_int */
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