V8 Project
char-predicates-inl.h
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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 
10 namespace v8 {
11 namespace 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.
17 inline int AsciiAlphaToLower(uc32 c) {
18  return c | 0x20;
19 }
20 
21 
22 inline bool IsCarriageReturn(uc32 c) {
23  return c == 0x000D;
24 }
25 
26 
27 inline bool IsLineFeed(uc32 c) {
28  return c == 0x000A;
29 }
30 
31 
32 inline 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 
39 inline bool IsDecimalDigit(uc32 c) {
40  // ECMA-262, 3rd, 7.8.3 (p 16)
41  return IsInRange(c, '0', '9');
42 }
43 
44 
45 inline bool IsHexDigit(uc32 c) {
46  // ECMA-262, 3rd, 7.6 (p 15)
47  return IsDecimalDigit(c) || IsInRange(AsciiAlphaToLower(c), 'a', 'f');
48 }
49 
50 
51 inline bool IsOctalDigit(uc32 c) {
52  // ECMA-262, 6th, 7.8.3
53  return IsInRange(c, '0', '7');
54 }
55 
56 
57 inline bool IsBinaryDigit(uc32 c) {
58  // ECMA-262, 6th, 7.8.3
59  return c == '0' || c == '1';
60 }
61 
62 
63 inline bool IsRegExpWord(uc16 c) {
64  return IsInRange(AsciiAlphaToLower(c), 'a', 'z')
65  || IsDecimalDigit(c)
66  || (c == '_');
67 }
68 
69 
70 inline 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_
#define DCHECK(condition)
Definition: logging.h:205
bool IsDecimalDigit(uc32 c)
bool IsCarriageReturn(uc32 c)
bool IsInRange(int value, int lower_limit, int higher_limit)
bool IsLineFeed(uc32 c)
bool IsOctalDigit(uc32 c)
bool IsHexDigit(uc32 c)
bool IsRegExpNewline(uc16 c)
bool IsRegExpWord(uc16 c)
bool IsBinaryDigit(uc32 c)
int AsciiAlphaToLower(uc32 c)
uint16_t uc16
Definition: globals.h:184
int32_t uc32
Definition: globals.h:185
Debugger support for the V8 JavaScript engine.
Definition: accessors.cc:20