/js/src/yarr/ASCIICType.h
C Header | 183 lines | 110 code | 20 blank | 53 comment | 93 complexity | 8d66427dd3249bb1f1c542f2a6748d01 MD5 | raw file
1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- 2 * vim: set ts=8 sw=4 et tw=99 ft=cpp: 3 * 4 * ***** BEGIN LICENSE BLOCK ***** 5 * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 17 * its contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 21 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 23 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 24 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * ***** END LICENSE BLOCK ***** */ 32 33#ifndef WTF_ASCIICType_h 34#define WTF_ASCIICType_h 35 36#include "assembler/wtf/Assertions.h" 37 38// The behavior of many of the functions in the <ctype.h> header is dependent 39// on the current locale. But in the WebKit project, all uses of those functions 40// are in code processing something that's not locale-specific. These equivalents 41// for some of the <ctype.h> functions are named more explicitly, not dependent 42// on the C library locale, and we should also optimize them as needed. 43 44// All functions return false or leave the character unchanged if passed a character 45// that is outside the range 0-7F. So they can be used on Unicode strings or 46// characters if the intent is to do processing only if the character is ASCII. 47 48namespace WTF { 49 50 inline bool isASCII(char c) { return !(c & ~0x7F); } 51 inline bool isASCII(unsigned short c) { return !(c & ~0x7F); } 52#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 53 inline bool isASCII(wchar_t c) { return !(c & ~0x7F); } 54#endif 55 inline bool isASCII(int c) { return !(c & ~0x7F); } 56 inline bool isASCII(unsigned c) { return !(c & ~0x7F); } 57 58 inline bool isASCIIAlpha(char c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 59 inline bool isASCIIAlpha(unsigned short c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 60#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 61 inline bool isASCIIAlpha(wchar_t c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 62#endif 63 inline bool isASCIIAlpha(int c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 64 inline bool isASCIIAlpha(unsigned c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; } 65 66 inline bool isASCIIAlphanumeric(char c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); } 67 inline bool isASCIIAlphanumeric(unsigned short c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); } 68#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 69 inline bool isASCIIAlphanumeric(wchar_t c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); } 70#endif 71 inline bool isASCIIAlphanumeric(int c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); } 72 inline bool isASCIIAlphanumeric(unsigned c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); } 73 74 inline bool isASCIIDigit(char c) { return (c >= '0') & (c <= '9'); } 75 inline bool isASCIIDigit(unsigned short c) { return (c >= '0') & (c <= '9'); } 76#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 77 inline bool isASCIIDigit(wchar_t c) { return (c >= '0') & (c <= '9'); } 78#endif 79 inline bool isASCIIDigit(int c) { return (c >= '0') & (c <= '9'); } 80 inline bool isASCIIDigit(unsigned c) { return (c >= '0') & (c <= '9'); } 81 82 inline bool isASCIIHexDigit(char c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); } 83 inline bool isASCIIHexDigit(unsigned short c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); } 84#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 85 inline bool isASCIIHexDigit(wchar_t c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); } 86#endif 87 inline bool isASCIIHexDigit(int c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); } 88 inline bool isASCIIHexDigit(unsigned c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); } 89 90 inline bool isASCIIOctalDigit(char c) { return (c >= '0') & (c <= '7'); } 91 inline bool isASCIIOctalDigit(unsigned short c) { return (c >= '0') & (c <= '7'); } 92#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 93 inline bool isASCIIOctalDigit(wchar_t c) { return (c >= '0') & (c <= '7'); } 94#endif 95 inline bool isASCIIOctalDigit(int c) { return (c >= '0') & (c <= '7'); } 96 inline bool isASCIIOctalDigit(unsigned c) { return (c >= '0') & (c <= '7'); } 97 98 inline bool isASCIILower(char c) { return c >= 'a' && c <= 'z'; } 99 inline bool isASCIILower(unsigned short c) { return c >= 'a' && c <= 'z'; } 100#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 101 inline bool isASCIILower(wchar_t c) { return c >= 'a' && c <= 'z'; } 102#endif 103 inline bool isASCIILower(int c) { return c >= 'a' && c <= 'z'; } 104 inline bool isASCIILower(unsigned c) { return c >= 'a' && c <= 'z'; } 105 106 inline bool isASCIIUpper(char c) { return c >= 'A' && c <= 'Z'; } 107 inline bool isASCIIUpper(unsigned short c) { return c >= 'A' && c <= 'Z'; } 108#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 109 inline bool isASCIIUpper(wchar_t c) { return c >= 'A' && c <= 'Z'; } 110#endif 111 inline bool isASCIIUpper(int c) { return c >= 'A' && c <= 'Z'; } 112 inline bool isASCIIUpper(unsigned c) { return c >= 'A' && c <= 'Z'; } 113 114 /* 115 Statistics from a run of Apple's page load test for callers of isASCIISpace: 116 117 character count 118 --------- ----- 119 non-spaces 689383 120 20 space 294720 121 0A \n 89059 122 09 \t 28320 123 0D \r 0 124 0C \f 0 125 0B \v 0 126 */ 127 inline bool isASCIISpace(char c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); } 128 inline bool isASCIISpace(unsigned short c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); } 129#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 130 inline bool isASCIISpace(wchar_t c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); } 131#endif 132 inline bool isASCIISpace(int c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); } 133 inline bool isASCIISpace(unsigned c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); } 134 135 inline char toASCIILower(char c) { return c | ((c >= 'A' && c <= 'Z') << 5); } 136 inline unsigned short toASCIILower(unsigned short c) { return c | ((c >= 'A' && c <= 'Z') << 5); } 137#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 138 inline wchar_t toASCIILower(wchar_t c) { return c | ((c >= 'A' && c <= 'Z') << 5); } 139#endif 140 inline int toASCIILower(int c) { return c | ((c >= 'A' && c <= 'Z') << 5); } 141 inline unsigned toASCIILower(unsigned c) { return c | ((c >= 'A' && c <= 'Z') << 5); } 142 143 // FIXME: Why do these need static_cast? 144 inline char toASCIIUpper(char c) { return static_cast<char>(c & ~((c >= 'a' && c <= 'z') << 5)); } 145 inline unsigned short toASCIIUpper(unsigned short c) { return static_cast<unsigned short>(c & ~((c >= 'a' && c <= 'z') << 5)); } 146#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 147 inline wchar_t toASCIIUpper(wchar_t c) { return static_cast<wchar_t>(c & ~((c >= 'a' && c <= 'z') << 5)); } 148#endif 149 inline int toASCIIUpper(int c) { return static_cast<int>(c & ~((c >= 'a' && c <= 'z') << 5)); } 150 inline unsigned toASCIIUpper(unsigned c) { return static_cast<unsigned>(c & ~((c >= 'a' && c <= 'z') << 5)); } 151 152 inline int toASCIIHexValue(char c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; } 153 inline int toASCIIHexValue(unsigned short c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; } 154#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 155 inline int toASCIIHexValue(wchar_t c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; } 156#endif 157 inline int toASCIIHexValue(int c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; } 158 inline int toASCIIHexValue(unsigned c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; } 159 160 inline bool isASCIIPrintable(char c) { return c >= ' ' && c <= '~'; } 161 inline bool isASCIIPrintable(unsigned short c) { return c >= ' ' && c <= '~'; } 162#if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED) 163 inline bool isASCIIPrintable(wchar_t c) { return c >= ' ' && c <= '~'; } 164#endif 165 inline bool isASCIIPrintable(int c) { return c >= ' ' && c <= '~'; } 166 inline bool isASCIIPrintable(unsigned c) { return c >= ' ' && c <= '~'; } 167} 168 169using WTF::isASCII; 170using WTF::isASCIIAlpha; 171using WTF::isASCIIAlphanumeric; 172using WTF::isASCIIDigit; 173using WTF::isASCIIHexDigit; 174using WTF::isASCIILower; 175using WTF::isASCIIOctalDigit; 176using WTF::isASCIIPrintable; 177using WTF::isASCIISpace; 178using WTF::isASCIIUpper; 179using WTF::toASCIIHexValue; 180using WTF::toASCIILower; 181using WTF::toASCIIUpper; 182 183#endif