48f9c16184
As described in unicode database file PropertyValueAliases.txt R=littledan@chromium.org BUG=v8:4743 LOG=N Review URL: https://codereview.chromium.org/1776953002 Cr-Commit-Position: refs/heads/master@{#34638}
92 lines
1.9 KiB
C++
92 lines
1.9 KiB
C++
// Copyright 2011 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_CHAR_PREDICATES_INL_H_
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#define V8_CHAR_PREDICATES_INL_H_
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#include "src/char-predicates.h"
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namespace v8 {
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namespace internal {
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// If c is in 'A'-'Z' or 'a'-'z', return its lower-case.
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// Else, return something outside of 'A'-'Z' and 'a'-'z'.
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// Note: it ignores LOCALE.
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inline int AsciiAlphaToLower(uc32 c) {
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return c | 0x20;
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}
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inline bool IsCarriageReturn(uc32 c) {
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return c == 0x000D;
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}
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inline bool IsLineFeed(uc32 c) {
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return c == 0x000A;
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}
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inline bool IsInRange(int value, int lower_limit, int higher_limit) {
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DCHECK(lower_limit <= higher_limit);
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return static_cast<unsigned int>(value - lower_limit) <=
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static_cast<unsigned int>(higher_limit - lower_limit);
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}
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inline bool IsAsciiIdentifier(uc32 c) {
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return IsAlphaNumeric(c) || c == '$' || c == '_';
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}
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inline bool IsAlphaNumeric(uc32 c) {
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return IsInRange(AsciiAlphaToLower(c), 'a', 'z') || IsDecimalDigit(c);
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}
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inline bool IsDecimalDigit(uc32 c) {
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// ECMA-262, 3rd, 7.8.3 (p 16)
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return IsInRange(c, '0', '9');
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}
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inline bool IsHexDigit(uc32 c) {
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// ECMA-262, 3rd, 7.6 (p 15)
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return IsDecimalDigit(c) || IsInRange(AsciiAlphaToLower(c), 'a', 'f');
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}
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inline bool IsOctalDigit(uc32 c) {
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// ECMA-262, 6th, 7.8.3
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return IsInRange(c, '0', '7');
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}
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inline bool IsBinaryDigit(uc32 c) {
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// ECMA-262, 6th, 7.8.3
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return c == '0' || c == '1';
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}
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inline bool IsRegExpWord(uc16 c) {
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return IsInRange(AsciiAlphaToLower(c), 'a', 'z')
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|| IsDecimalDigit(c)
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|| (c == '_');
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}
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inline bool IsRegExpNewline(uc16 c) {
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switch (c) {
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// CR LF LS PS
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case 0x000A: case 0x000D: case 0x2028: case 0x2029:
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return false;
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default:
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return true;
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}
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}
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} // namespace internal
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} // namespace v8
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#endif // V8_CHAR_PREDICATES_INL_H_
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