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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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