1// Copyright 2011 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_CHAR_PREDICATES_INL_H_
6#define V8_CHAR_PREDICATES_INL_H_
7
8#include "src/char-predicates.h"
9
10namespace v8 {
11namespace internal {
12
13
14// If c is in 'A'-'Z' or 'a'-'z', return its lower-case.
15// Else, return something outside of 'A'-'Z' and 'a'-'z'.
16// Note: it ignores LOCALE.
17inline int AsciiAlphaToLower(uc32 c) {
18  return c | 0x20;
19}
20
21
22inline bool IsCarriageReturn(uc32 c) {
23  return c == 0x000D;
24}
25
26
27inline bool IsLineFeed(uc32 c) {
28  return c == 0x000A;
29}
30
31
32inline bool IsInRange(int value, int lower_limit, int higher_limit) {
33  DCHECK(lower_limit <= higher_limit);
34  return static_cast<unsigned int>(value - lower_limit) <=
35      static_cast<unsigned int>(higher_limit - lower_limit);
36}
37
38
39inline bool IsDecimalDigit(uc32 c) {
40  // ECMA-262, 3rd, 7.8.3 (p 16)
41  return IsInRange(c, '0', '9');
42}
43
44
45inline bool IsHexDigit(uc32 c) {
46  // ECMA-262, 3rd, 7.6 (p 15)
47  return IsDecimalDigit(c) || IsInRange(AsciiAlphaToLower(c), 'a', 'f');
48}
49
50
51inline bool IsOctalDigit(uc32 c) {
52  // ECMA-262, 6th, 7.8.3
53  return IsInRange(c, '0', '7');
54}
55
56
57inline bool IsBinaryDigit(uc32 c) {
58  // ECMA-262, 6th, 7.8.3
59  return c == '0' || c == '1';
60}
61
62
63inline bool IsRegExpWord(uc16 c) {
64  return IsInRange(AsciiAlphaToLower(c), 'a', 'z')
65      || IsDecimalDigit(c)
66      || (c == '_');
67}
68
69
70inline bool IsRegExpNewline(uc16 c) {
71  switch (c) {
72    //   CR           LF           LS           PS
73    case 0x000A: case 0x000D: case 0x2028: case 0x2029:
74      return false;
75    default:
76      return true;
77  }
78}
79
80
81} }  // namespace v8::internal
82
83#endif  // V8_CHAR_PREDICATES_INL_H_
84