1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
// Copyright 2011 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_CHAR_PREDICATES_INL_H_
#define V8_CHAR_PREDICATES_INL_H_
#include "src/char-predicates.h"
namespace v8 {
namespace internal {
// If c is in 'A'-'Z' or 'a'-'z', return its lower-case.
// Else, return something outside of 'A'-'Z' and 'a'-'z'.
// Note: it ignores LOCALE.
inline int AsciiAlphaToLower(uc32 c) {
return c | 0x20;
}
inline bool IsCarriageReturn(uc32 c) {
return c == 0x000D;
}
inline bool IsLineFeed(uc32 c) {
return c == 0x000A;
}
inline bool IsInRange(int value, int lower_limit, int higher_limit) {
DCHECK(lower_limit <= higher_limit);
return static_cast<unsigned int>(value - lower_limit) <=
static_cast<unsigned int>(higher_limit - lower_limit);
}
inline bool IsAsciiIdentifier(uc32 c) {
return IsAlphaNumeric(c) || c == '$' || c == '_';
}
inline bool IsAlphaNumeric(uc32 c) {
return IsInRange(AsciiAlphaToLower(c), 'a', 'z') || IsDecimalDigit(c);
}
inline bool IsDecimalDigit(uc32 c) {
// ECMA-262, 3rd, 7.8.3 (p 16)
return IsInRange(c, '0', '9');
}
inline bool IsHexDigit(uc32 c) {
// ECMA-262, 3rd, 7.6 (p 15)
return IsDecimalDigit(c) || IsInRange(AsciiAlphaToLower(c), 'a', 'f');
}
inline bool IsOctalDigit(uc32 c) {
// ECMA-262, 6th, 7.8.3
return IsInRange(c, '0', '7');
}
inline bool IsBinaryDigit(uc32 c) {
// ECMA-262, 6th, 7.8.3
return c == '0' || c == '1';
}
inline bool IsRegExpWord(uc16 c) {
return IsInRange(AsciiAlphaToLower(c), 'a', 'z')
|| IsDecimalDigit(c)
|| (c == '_');
}
inline bool IsRegExpNewline(uc16 c) {
switch (c) {
// CR LF LS PS
case 0x000A: case 0x000D: case 0x2028: case 0x2029:
return false;
default:
return true;
}
}
} // namespace internal
} // namespace v8
#endif // V8_CHAR_PREDICATES_INL_H_
|
