1// Copyright 2011 the V8 project authors. All rights reserved.
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3// modification, are permitted provided that the following conditions are
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15//
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27
28#ifndef V8_CHAR_PREDICATES_INL_H_
29#define V8_CHAR_PREDICATES_INL_H_
30
31#include "char-predicates.h"
32
33namespace v8 {
34namespace internal {
35
36
37// If c is in 'A'-'Z' or 'a'-'z', return its lower-case.
38// Else, return something outside of 'A'-'Z' and 'a'-'z'.
39// Note: it ignores LOCALE.
40inline int AsciiAlphaToLower(uc32 c) {
41  return c | 0x20;
42}
43
44
45inline bool IsCarriageReturn(uc32 c) {
46  return c == 0x000D;
47}
48
49
50inline bool IsLineFeed(uc32 c) {
51  return c == 0x000A;
52}
53
54
55inline bool IsInRange(int value, int lower_limit, int higher_limit) {
56  ASSERT(lower_limit <= higher_limit);
57  return static_cast<unsigned int>(value - lower_limit) <=
58      static_cast<unsigned int>(higher_limit - lower_limit);
59}
60
61
62inline bool IsDecimalDigit(uc32 c) {
63  // ECMA-262, 3rd, 7.8.3 (p 16)
64  return IsInRange(c, '0', '9');
65}
66
67
68inline bool IsHexDigit(uc32 c) {
69  // ECMA-262, 3rd, 7.6 (p 15)
70  return IsDecimalDigit(c) || IsInRange(AsciiAlphaToLower(c), 'a', 'f');
71}
72
73
74inline bool IsRegExpWord(uc16 c) {
75  return IsInRange(AsciiAlphaToLower(c), 'a', 'z')
76      || IsDecimalDigit(c)
77      || (c == '_');
78}
79
80
81inline bool IsRegExpNewline(uc16 c) {
82  switch (c) {
83    //   CR           LF           LS           PS
84    case 0x000A: case 0x000D: case 0x2028: case 0x2029:
85      return false;
86    default:
87      return true;
88  }
89}
90
91
92} }  // namespace v8::internal
93
94#endif  // V8_CHAR_PREDICATES_INL_H_
95