Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
| 5 | #ifndef V8_CHAR_PREDICATES_INL_H_ |
| 6 | #define V8_CHAR_PREDICATES_INL_H_ |
| 7 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 8 | #include "src/char-predicates.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 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 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 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 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 32 | inline bool IsInRange(int value, int lower_limit, int higher_limit) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 33 | DCHECK(lower_limit <= higher_limit); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | return static_cast<unsigned int>(value - lower_limit) <= |
| 35 | static_cast<unsigned int>(higher_limit - lower_limit); |
| 36 | } |
| 37 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 38 | inline bool IsAsciiIdentifier(uc32 c) { |
| 39 | return IsAlphaNumeric(c) || c == '$' || c == '_'; |
| 40 | } |
| 41 | |
| 42 | inline bool IsAlphaNumeric(uc32 c) { |
| 43 | return IsInRange(AsciiAlphaToLower(c), 'a', 'z') || IsDecimalDigit(c); |
| 44 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 45 | |
| 46 | inline bool IsDecimalDigit(uc32 c) { |
| 47 | // ECMA-262, 3rd, 7.8.3 (p 16) |
| 48 | return IsInRange(c, '0', '9'); |
| 49 | } |
| 50 | |
| 51 | |
| 52 | inline bool IsHexDigit(uc32 c) { |
| 53 | // ECMA-262, 3rd, 7.6 (p 15) |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 54 | return IsDecimalDigit(c) || IsInRange(AsciiAlphaToLower(c), 'a', 'f'); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 58 | inline bool IsOctalDigit(uc32 c) { |
| 59 | // ECMA-262, 6th, 7.8.3 |
| 60 | return IsInRange(c, '0', '7'); |
| 61 | } |
| 62 | |
| 63 | |
| 64 | inline bool IsBinaryDigit(uc32 c) { |
| 65 | // ECMA-262, 6th, 7.8.3 |
| 66 | return c == '0' || c == '1'; |
| 67 | } |
| 68 | |
| 69 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 70 | inline bool IsRegExpWord(uc16 c) { |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 71 | return IsInRange(AsciiAlphaToLower(c), 'a', 'z') |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 72 | || IsDecimalDigit(c) |
| 73 | || (c == '_'); |
| 74 | } |
| 75 | |
| 76 | |
| 77 | inline bool IsRegExpNewline(uc16 c) { |
| 78 | switch (c) { |
| 79 | // CR LF LS PS |
| 80 | case 0x000A: case 0x000D: case 0x2028: case 0x2029: |
| 81 | return false; |
| 82 | default: |
| 83 | return true; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 88 | } // namespace internal |
| 89 | } // namespace v8 |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 90 | |
| 91 | #endif // V8_CHAR_PREDICATES_INL_H_ |