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| 1 /* | |
| 2 * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
| 14 * its contributors may be used to endorse or promote products derived | |
| 15 * from this software without specific prior written permission. | |
| 16 * | |
| 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
| 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
| 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #ifndef THIRD_PARTY_JSCRE_ASCIICTYPE_H_ | |
| 30 #define THIRD_PARTY_JSCRE_ASCIICTYPE_H_ | |
| 31 | |
| 32 // The behavior of many of the functions in the <ctype.h> header is dependent | |
| 33 // on the current locale. But in the WebKit project, all uses of those functions | |
| 34 // are in code processing something that's not locale-specific. These | |
| 35 // equivalents for some of the <ctype.h> functions are named more explicitly, | |
| 36 // not dependent on the C library locale, and we should also optimize them | |
| 37 // as needed. | |
| 38 | |
| 39 // All functions return false or leave the character unchanged if passed | |
| 40 // a character that is outside the range 0-7F. So they can be used on | |
| 41 // Unicode strings or characters if the intent is to do processing only | |
| 42 // if the character is ASCII. | |
| 43 | |
| 44 inline bool isASCIIAlpha(char c) { | |
| 45 return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; | |
| 46 } | |
| 47 inline bool isASCIIAlpha(uint16_t c) { | |
| 48 return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; | |
| 49 } | |
| 50 inline bool isASCIIAlpha(int c) { | |
| 51 return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; | |
| 52 } | |
| 53 | |
| 54 inline bool isASCIIAlphanumeric(char c) { | |
| 55 return (c >= '0' && c <= '9') || | |
| 56 ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); | |
| 57 } | |
| 58 inline bool isASCIIAlphanumeric(uint16_t c) { | |
| 59 return (c >= '0' && c <= '9') || | |
| 60 ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); | |
| 61 } | |
| 62 inline bool isASCIIAlphanumeric(int c) { | |
| 63 return (c >= '0' && c <= '9') || | |
| 64 ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); | |
| 65 } | |
| 66 | |
| 67 inline bool isASCIIDigit(char c) { return (c >= '0') & (c <= '9'); } | |
| 68 inline bool isASCIIDigit(uint16_t c) { | |
| 69 return (c >= '0') & (c <= '9'); | |
| 70 } | |
| 71 inline bool isASCIIDigit(int c) { return (c >= '0') & (c <= '9'); } | |
| 72 | |
| 73 inline bool isASCIIHexDigit(char c) { | |
| 74 return (c >= '0' && c <= '9') || | |
| 75 ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); | |
| 76 } | |
| 77 inline bool isASCIIHexDigit(uint16_t c) { | |
| 78 return (c >= '0' && c <= '9') || | |
| 79 ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); | |
| 80 } | |
| 81 inline bool isASCIIHexDigit(int c) { | |
| 82 return (c >= '0' && c <= '9') || | |
| 83 ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); | |
| 84 } | |
| 85 | |
| 86 inline bool isASCIILower(char c) { return c >= 'a' && c <= 'z'; } | |
| 87 inline bool isASCIILower(uint16_t c) { return c >= 'a' && c <= 'z'; } | |
| 88 inline bool isASCIILower(int c) { return c >= 'a' && c <= 'z'; } | |
| 89 | |
| 90 inline bool isASCIIUpper(char c) { return c >= 'A' && c <= 'Z'; } | |
| 91 inline bool isASCIIUpper(uint16_t c) { return c >= 'A' && c <= 'Z'; } | |
| 92 inline bool isASCIIUpper(int c) { return c >= 'A' && c <= 'Z'; } | |
| 93 | |
| 94 /* | |
| 95 Statistics from a run of Apple's page load test for callers of | |
| 96 isASCIISpace: | |
| 97 | |
| 98 character count | |
| 99 --------- ----- | |
| 100 non-spaces 689383 | |
| 101 20 space 294720 | |
| 102 0A \n 89059 | |
| 103 09 \t 28320 | |
| 104 0D \r 0 | |
| 105 0C \f 0 | |
| 106 0B \v 0 | |
| 107 */ | |
| 108 inline bool isASCIISpace(char c) { | |
| 109 return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); | |
| 110 } | |
| 111 inline bool isASCIISpace(uint16_t c) { | |
| 112 return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); | |
| 113 } | |
| 114 inline bool isASCIISpace(int c) { | |
| 115 return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); | |
| 116 } | |
| 117 | |
| 118 inline char toASCIILower(char c) { | |
| 119 return c | ((c >= 'A' && c <= 'Z') << 5); | |
| 120 } | |
| 121 inline uint16_t toASCIILower(uint16_t c) { | |
| 122 return c | ((c >= 'A' && c <= 'Z') << 5); | |
| 123 } | |
| 124 inline int toASCIILower(int c) { | |
| 125 return c | ((c >= 'A' && c <= 'Z') << 5); | |
| 126 } | |
| 127 | |
| 128 inline char toASCIIUpper(char c) { | |
| 129 return static_cast<char>(c & ~((c >= 'a' && c <= 'z') << 5)); | |
| 130 } | |
| 131 inline uint16_t toASCIIUpper(uint16_t c) { | |
| 132 return static_cast<uint16_t>(c & ~((c >= 'a' && c <= 'z') << 5)); | |
| 133 } | |
| 134 inline int toASCIIUpper(int c) { | |
| 135 return static_cast<int>(c & ~((c >= 'a' && c <= 'z') << 5)); | |
| 136 } | |
| 137 | |
| 138 inline int toASCIIHexValue(char c) { | |
| 139 ASSERT(isASCIIHexDigit(c)); | |
| 140 return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; | |
| 141 } | |
| 142 inline int toASCIIHexValue(uint16_t c) { | |
| 143 ASSERT(isASCIIHexDigit(c)); | |
| 144 return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; | |
| 145 } | |
| 146 inline int toASCIIHexValue(int c) { | |
| 147 ASSERT(isASCIIHexDigit(c)); | |
| 148 return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; | |
| 149 } | |
| 150 | |
| 151 #endif // THIRD_PARTY_JSCRE_ASCIICTYPE_H_ | |
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