File indexing completed on 2024-05-12 15:43:37

 /*
  * Copyright (C) 2007, 2008 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/Platform.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
 {
 
 inline bool isASCIIAlpha(char c)
 {
     return (c | 0x20) >= 'a' && (c | 0x20) <= 'z';
 }
 inline bool isASCIIAlpha(unsigned short c)
 {
     return (c | 0x20) >= 'a' && (c | 0x20) <= 'z';
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline bool isASCIIAlpha(wchar_t c)
 {
     return (c | 0x20) >= 'a' && (c | 0x20) <= 'z';
 }
 #endif
 inline bool isASCIIAlpha(int c)
 {
     return (c | 0x20) >= 'a' && (c | 0x20) <= 'z';
 }
 
 inline bool isASCIIAlphanumeric(char c)
 {
     return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z');
 }
 inline bool isASCIIAlphanumeric(unsigned short c)
 {
     return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z');
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline bool isASCIIAlphanumeric(wchar_t c)
 {
     return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z');
 }
 #endif
 inline bool isASCIIAlphanumeric(int c)
 {
     return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z');
 }
 
 inline bool isASCIIDigit(char c)
 {
     return (c >= '0') & (c <= '9');
 }
 inline bool isASCIIDigit(unsigned short c)
 {
     return (c >= '0') & (c <= '9');
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline bool isASCIIDigit(wchar_t c)
 {
     return (c >= '0') & (c <= '9');
 }
 #endif
 inline bool isASCIIDigit(int c)
 {
     return (c >= '0') & (c <= '9');
 }
 
 inline bool isASCIIHexDigit(char c)
 {
     return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f');
 }
 inline bool isASCIIHexDigit(unsigned short c)
 {
     return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f');
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline bool isASCIIHexDigit(wchar_t c)
 {
     return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f');
 }
 #endif
 inline bool isASCIIHexDigit(int c)
 {
     return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f');
 }
 
 inline bool isASCIILower(char c)
 {
     return c >= 'a' && c <= 'z';
 }
 inline bool isASCIILower(unsigned short c)
 {
     return c >= 'a' && c <= 'z';
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline bool isASCIILower(wchar_t c)
 {
     return c >= 'a' && c <= 'z';
 }
 #endif
 inline bool isASCIILower(int c)
 {
     return c >= 'a' && c <= 'z';
 }
 
 inline bool isASCIIUpper(char c)
 {
     return c >= 'A' && c <= 'Z';
 }
 inline bool isASCIIUpper(unsigned short c)
 {
     return c >= 'A' && c <= 'Z';
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline bool isASCIIUpper(wchar_t c)
 {
     return c >= 'A' && c <= 'Z';
 }
 #endif
 inline bool isASCIIUpper(int c)
 {
     return c >= 'A' && c <= 'Z';
 }
 
 /*
     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
 */
 inline bool isASCIISpace(char c)
 {
     return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9));
 }
 inline bool isASCIISpace(unsigned short c)
 {
     return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9));
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline bool isASCIISpace(wchar_t c)
 {
     return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9));
 }
 #endif
 inline bool isASCIISpace(int c)
 {
     return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9));
 }
 
 inline char toASCIILower(char c)
 {
     return c | ((c >= 'A' && c <= 'Z') << 5);
 }
 inline unsigned short toASCIILower(unsigned short c)
 {
     return c | ((c >= 'A' && c <= 'Z') << 5);
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline wchar_t toASCIILower(wchar_t c)
 {
     return c | ((c >= 'A' && c <= 'Z') << 5);
 }
 #endif
 inline int toASCIILower(int c)
 {
     return c | ((c >= 'A' && c <= 'Z') << 5);
 }
 
 inline char toASCIIUpper(char c)
 {
     return static_cast<char>(c & ~((c >= 'a' && c <= 'z') << 5));
 }
 inline unsigned short toASCIIUpper(unsigned short c)
 {
     return static_cast<unsigned short>(c & ~((c >= 'a' && c <= 'z') << 5));
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline wchar_t toASCIIUpper(wchar_t c)
 {
     return static_cast<wchar_t>(c & ~((c >= 'a' && c <= 'z') << 5));
 }
 #endif
 inline int toASCIIUpper(int c)
 {
     return static_cast<int>(c & ~((c >= 'a' && c <= 'z') << 5));
 }
 
 inline int toASCIIHexValue(char c)
 {
     ASSERT(isASCIIHexDigit(c));
     return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF;
 }
 inline int toASCIIHexValue(unsigned short c)
 {
     ASSERT(isASCIIHexDigit(c));
     return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF;
 }
 #if !defined(WTF_COMPILER_MSVC) || defined(_NATIVE_WCHAR_T_DEFINED)
 inline int toASCIIHexValue(wchar_t c)
 {
     ASSERT(isASCIIHexDigit(c));
     return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF;
 }
 #endif
 inline int toASCIIHexValue(int c)
 {
     ASSERT(isASCIIHexDigit(c));
     return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF;
 }
 
 }
 
 #endif