| /* |
| * 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_ASCII_CTYPE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_ASCII_CTYPE_H_ |
| |
| #include "base/check_op.h" |
| #include "third_party/blink/renderer/platform/wtf/assertions.h" |
| #include "third_party/blink/renderer/platform/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 kASCIICaseFoldTable[256]; |
| |
| template <typename CharType> |
| inline CharType ToASCIILower(CharType c) { |
| return c | ((c >= 'A' && c <= 'Z') << 5); |
| } |
| |
| inline LChar ToASCIILower(LChar c) { |
| return kASCIICaseFoldTable[c]; |
| } |
| |
| inline char ToASCIILower(char c) { |
| return static_cast<char>(kASCIICaseFoldTable[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) { |
| DCHECK(IsASCIIHexDigit(c)); |
| return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; |
| } |
| |
| template <typename CharType> |
| inline int ToASCIIHexValue(CharType upper_value, CharType lower_value) { |
| DCHECK(IsASCIIHexDigit(upper_value)); |
| DCHECK(IsASCIIHexDigit(lower_value)); |
| return ((ToASCIIHexValue(upper_value) << 4) & 0xF0) | |
| ToASCIIHexValue(lower_value); |
| } |
| |
| 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 css_character, char character) { |
| // This function compares a (preferably) constant ASCII |
| // lowercase letter to any input character. |
| DCHECK_GE(character, 'a'); |
| DCHECK_LE(character, 'z'); |
| return LIKELY((css_character | 0x20) == character); |
| } |
| |
| } // namespace WTF |
| |
| using WTF::IsASCII; |
| using WTF::IsASCIIAlpha; |
| using WTF::IsASCIIAlphaCaselessEqual; |
| 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::LowerNibbleToASCIIHexDigit; |
| using WTF::ToASCIIHexValue; |
| using WTF::ToASCIILower; |
| using WTF::ToASCIIUpper; |
| using WTF::UpperNibbleToASCIIHexDigit; |
| |
| #endif |