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char-predicates-inl.h
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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 
33 namespace v8 {
34 namespace 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.
40 inline int AsciiAlphaToLower(uc32 c) {
41  return c | 0x20;
42 }
43 
44 
45 inline bool IsCarriageReturn(uc32 c) {
46  return c == 0x000D;
47 }
48 
49 
50 inline bool IsLineFeed(uc32 c) {
51  return c == 0x000A;
52 }
53 
54 
55 inline 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 
62 inline bool IsDecimalDigit(uc32 c) {
63  // ECMA-262, 3rd, 7.8.3 (p 16)
64  return IsInRange(c, '0', '9');
65 }
66 
67 
68 inline bool IsHexDigit(uc32 c) {
69  // ECMA-262, 3rd, 7.6 (p 15)
70  return IsDecimalDigit(c) || IsInRange(AsciiAlphaToLower(c), 'a', 'f');
71 }
72 
73 
74 inline bool IsRegExpWord(uc16 c) {
75  return IsInRange(AsciiAlphaToLower(c), 'a', 'z')
76  || IsDecimalDigit(c)
77  || (c == '_');
78 }
79 
80 
81 inline 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_
bool IsRegExpWord(uc16 c)
int AsciiAlphaToLower(uc32 c)
int32_t uc32
Definition: globals.h:260
#define ASSERT(condition)
Definition: checks.h:270
bool IsRegExpNewline(uc16 c)
bool IsCarriageReturn(uc32 c)
uint16_t uc16
Definition: globals.h:259
bool IsInRange(int value, int lower_limit, int higher_limit)
bool IsHexDigit(uc32 c)
bool IsDecimalDigit(uc32 c)
bool IsLineFeed(uc32 c)