| /* |
| * Copyright (C) 2007, 2008, 2009, 2011 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef WTF_ASCIICType_h |
| #define WTF_ASCIICType_h |
| |
| #include "wtf/Assertions.h" |
| #include "wtf/text/Unicode.h" |
| |
| // The behavior of many of the functions in the <ctype.h> header is dependent |
| // on the current locale. But in the WebKit project, all uses of those functions |
| // are in code processing something that's not locale-specific. These |
| // equivalents for some of the <ctype.h> functions are named more explicitly, |
| // not dependent on the C library locale, and we should also optimize them as |
| // needed. |
| |
| // All functions return false or leave the character unchanged if passed a |
| // character that is outside the range 0-7F. So they can be used on Unicode |
| // strings or characters if the intent is to do processing only if the |
| // character is ASCII. |
| |
| namespace WTF { |
| |
| template <typename CharType> |
| inline bool isASCII(CharType c) { |
| return !(c & ~0x7F); |
| } |
| |
| template <typename CharType> |
| inline bool isASCIIAlpha(CharType c) { |
| return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; |
| } |
| |
| template <typename CharType> |
| inline bool isASCIIDigit(CharType c) { |
| return c >= '0' && c <= '9'; |
| } |
| |
| template <typename CharType> |
| inline bool isASCIIAlphanumeric(CharType c) { |
| return isASCIIDigit(c) || isASCIIAlpha(c); |
| } |
| |
| template <typename CharType> |
| inline bool isASCIIHexDigit(CharType c) { |
| return isASCIIDigit(c) || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); |
| } |
| |
| template <typename CharType> |
| inline bool isASCIILower(CharType c) { |
| return c >= 'a' && c <= 'z'; |
| } |
| |
| template <typename CharType> |
| inline bool isASCIIOctalDigit(CharType c) { |
| return (c >= '0') & (c <= '7'); |
| } |
| |
| template <typename CharType> |
| inline bool isASCIIPrintable(CharType c) { |
| return c >= ' ' && c <= '~'; |
| } |
| |
| /* |
| Statistics from a run of Apple's page load test for callers of isASCIISpace: |
| |
| character count |
| --------- ----- |
| non-spaces 689383 |
| 20 space 294720 |
| 0A \n 89059 |
| 09 \t 28320 |
| 0D \r 0 |
| 0C \f 0 |
| 0B \v 0 |
| */ |
| template <typename CharType> |
| inline bool isASCIISpace(CharType c) { |
| return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); |
| } |
| |
| template <typename CharType> |
| inline bool isASCIIUpper(CharType c) { |
| return c >= 'A' && c <= 'Z'; |
| } |
| |
| WTF_EXPORT extern const LChar ASCIICaseFoldTable[256]; |
| |
| template <typename CharType> |
| inline CharType toASCIILower(CharType c) { |
| return c | ((c >= 'A' && c <= 'Z') << 5); |
| } |
| |
| inline LChar toASCIILower(LChar c) { |
| return ASCIICaseFoldTable[c]; |
| } |
| |
| inline char toASCIILower(char c) { |
| return static_cast<char>(ASCIICaseFoldTable[static_cast<LChar>(c)]); |
| } |
| |
| template <typename CharType> |
| inline CharType toASCIIUpper(CharType c) { |
| return c & ~((c >= 'a' && c <= 'z') << 5); |
| } |
| |
| template <typename CharType> |
| inline int toASCIIHexValue(CharType c) { |
| ASSERT(isASCIIHexDigit(c)); |
| return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; |
| } |
| |
| template <typename CharType> |
| inline int toASCIIHexValue(CharType upperValue, CharType lowerValue) { |
| ASSERT(isASCIIHexDigit(upperValue) && isASCIIHexDigit(lowerValue)); |
| return ((toASCIIHexValue(upperValue) << 4) & 0xF0) | |
| toASCIIHexValue(lowerValue); |
| } |
| |
| inline char lowerNibbleToASCIIHexDigit(char c) { |
| char nibble = c & 0xF; |
| return nibble < 10 ? '0' + nibble : 'A' + nibble - 10; |
| } |
| |
| inline char upperNibbleToASCIIHexDigit(char c) { |
| char nibble = (c >> 4) & 0xF; |
| return nibble < 10 ? '0' + nibble : 'A' + nibble - 10; |
| } |
| |
| template <typename CharType> |
| inline bool isASCIIAlphaCaselessEqual(CharType cssCharacter, char character) { |
| // This function compares a (preferrably) constant ASCII |
| // lowercase letter to any input character. |
| ASSERT(character >= 'a' && character <= 'z'); |
| return LIKELY((cssCharacter | 0x20) == character); |
| } |
| |
| } // namespace WTF |
| |
| using WTF::isASCII; |
| using WTF::isASCIIAlpha; |
| using WTF::isASCIIAlphanumeric; |
| using WTF::isASCIIDigit; |
| using WTF::isASCIIHexDigit; |
| using WTF::isASCIILower; |
| using WTF::isASCIIOctalDigit; |
| using WTF::isASCIIPrintable; |
| using WTF::isASCIISpace; |
| using WTF::isASCIIUpper; |
| using WTF::toASCIIHexValue; |
| using WTF::toASCIILower; |
| using WTF::toASCIIUpper; |
| using WTF::lowerNibbleToASCIIHexDigit; |
| using WTF::upperNibbleToASCIIHexDigit; |
| using WTF::isASCIIAlphaCaselessEqual; |
| |
| #endif |