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Diffstat (limited to 'src/3rdparty/masm/wtf/ASCIICType.h')
| -rw-r--r-- | src/3rdparty/masm/wtf/ASCIICType.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/3rdparty/masm/wtf/ASCIICType.h b/src/3rdparty/masm/wtf/ASCIICType.h new file mode 100644 index 0000000000..18e108e1bf --- /dev/null +++ b/src/3rdparty/masm/wtf/ASCIICType.h @@ -0,0 +1,181 @@ +/* + * 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> + +// 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'; +} + +template<typename CharType> inline CharType toASCIILower(CharType c) +{ + return c | ((c >= 'A' && c <= 'Z') << 5); +} + +template<typename CharType> inline CharType toASCIILowerUnchecked(CharType character) +{ + // This function can be used for comparing any input character + // to a lowercase English character. The isASCIIAlphaCaselessEqual + // below should be used for regular comparison of ASCII alpha + // characters, but switch statements in CSS tokenizer require + // direct use of this function. + return character | 0x20; +} + +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(toASCIILowerUnchecked(cssCharacter) == character); +} + +} + +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::toASCIILowerUnchecked; +using WTF::toASCIIUpper; +using WTF::lowerNibbleToASCIIHexDigit; +using WTF::upperNibbleToASCIIHexDigit; +using WTF::isASCIIAlphaCaselessEqual; + +#endif |