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/js/src/yarr/ASCIICType.h

http://github.com/zpao/v8monkey
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