/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. 

  2.  * vim: set ts=8 sw=4 et tw=99 ft=cpp:
    3. 

  3.  *
    4. 

  4.  * ***** BEGIN LICENSE BLOCK *****
    5. 

  5.  * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
    6. 

  6.  *
    7. 

  7.  * Redistribution and use in source and binary forms, with or without
    8. 

  8.  * modification, are permitted provided that the following conditions
    9. 

  9.  * are met:
    10. 

  10.  *
    11. 

  11.  * 1.  Redistributions of source code must retain the above copyright
    12. 

  12.  *     notice, this list of conditions and the following disclaimer. 
    13. 

  13.  * 2.  Redistributions in binary form must reproduce the above copyright
    14. 

  14.  *     notice, this list of conditions and the following disclaimer in the
    15. 

  15.  *     documentation and/or other materials provided with the distribution. 
    16. 

  16.  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
    17. 

  17.  *     its contributors may be used to endorse or promote products derived
    18. 

  18.  *     from this software without specific prior written permission. 
    19. 

  19.  *
    20. 

  20.  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
    21. 

  21.  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
    22. 

  22.  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    23. 

  23.  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
    24. 

  24.  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    25. 

  25.  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    26. 

  26.  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    27. 

  27.  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    28. 

  28.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    29. 

  29.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    30. 

  30.  *
    31. 

  31.  * ***** END LICENSE BLOCK ***** */
    32. 

  32. 

  33. #ifndef WTF_ASCIICType_h
    34. 

  34. #define WTF_ASCIICType_h
    35. 

  35. 

  36. #include "assembler/wtf/Assertions.h"
    37. 

  37. 

  38. // The behavior of many of the functions in the <ctype.h> header is dependent
    39. 

  39. // on the current locale. But in the WebKit project, all uses of those functions
    40. 

  40. // are in code processing something that's not locale-specific. These equivalents
    41. 

  41. // for some of the <ctype.h> functions are named more explicitly, not dependent
    42. 

  42. // on the C library locale, and we should also optimize them as needed.
    43. 

  43. 

  44. // All functions return false or leave the character unchanged if passed a character
    45. 

  45. // that is outside the range 0-7F. So they can be used on Unicode strings or
    46. 

  46. // characters if the intent is to do processing only if the character is ASCII.
    47. 

  47. 

  48. namespace WTF {
    49. 

  49. 

  50.     inline bool isASCII(char c) { return !(c & ~0x7F); }
    51. 

  51.     inline bool isASCII(unsigned short c) { return !(c & ~0x7F); }
    52. 

  52. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    53. 

  53.     inline bool isASCII(wchar_t c) { return !(c & ~0x7F); }
    54. 

  54. #endif
    55. 

  55.     inline bool isASCII(int c) { return !(c & ~0x7F); }
    56. 

  56.     inline bool isASCII(unsigned c) { return !(c & ~0x7F); }
    57. 

  57. 

  58.     inline bool isASCIIAlpha(char c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; }
    59. 

  59.     inline bool isASCIIAlpha(unsigned short c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; }
    60. 

  60. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    61. 

  61.     inline bool isASCIIAlpha(wchar_t c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; }
    62. 

  62. #endif
    63. 

  63.     inline bool isASCIIAlpha(int c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; }
    64. 

  64.     inline bool isASCIIAlpha(unsigned c) { return (c | 0x20) >= 'a' && (c | 0x20) <= 'z'; }
    65. 

  65. 

  66.     inline bool isASCIIAlphanumeric(char c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); }
    67. 

  67.     inline bool isASCIIAlphanumeric(unsigned short c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); }
    68. 

  68. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    69. 

  69.     inline bool isASCIIAlphanumeric(wchar_t c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); }
    70. 

  70. #endif
    71. 

  71.     inline bool isASCIIAlphanumeric(int c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); }
    72. 

  72.     inline bool isASCIIAlphanumeric(unsigned c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'z'); }
    73. 

  73. 

  74.     inline bool isASCIIDigit(char c) { return (c >= '0') & (c <= '9'); }
    75. 

  75.     inline bool isASCIIDigit(unsigned short c) { return (c >= '0') & (c <= '9'); }
    76. 

  76. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    77. 

  77.     inline bool isASCIIDigit(wchar_t c) { return (c >= '0') & (c <= '9'); }
    78. 

  78. #endif
    79. 

  79.     inline bool isASCIIDigit(int c) { return (c >= '0') & (c <= '9'); }
    80. 

  80.     inline bool isASCIIDigit(unsigned c) { return (c >= '0') & (c <= '9'); }
    81. 

  81. 

  82.     inline bool isASCIIHexDigit(char c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); }
    83. 

  83.     inline bool isASCIIHexDigit(unsigned short c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); }
    84. 

  84. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    85. 

  85.     inline bool isASCIIHexDigit(wchar_t c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); }
    86. 

  86. #endif
    87. 

  87.     inline bool isASCIIHexDigit(int c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); }
    88. 

  88.     inline bool isASCIIHexDigit(unsigned c) { return (c >= '0' && c <= '9') || ((c | 0x20) >= 'a' && (c | 0x20) <= 'f'); }
    89. 

  89. 

  90.     inline bool isASCIIOctalDigit(char c) { return (c >= '0') & (c <= '7'); }
    91. 

  91.     inline bool isASCIIOctalDigit(unsigned short c) { return (c >= '0') & (c <= '7'); }
    92. 

  92. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    93. 

  93.     inline bool isASCIIOctalDigit(wchar_t c) { return (c >= '0') & (c <= '7'); }
    94. 

  94. #endif
    95. 

  95.     inline bool isASCIIOctalDigit(int c) { return (c >= '0') & (c <= '7'); }
    96. 

  96.     inline bool isASCIIOctalDigit(unsigned c) { return (c >= '0') & (c <= '7'); }
    97. 

  97. 

  98.     inline bool isASCIILower(char c) { return c >= 'a' && c <= 'z'; }
    99. 

  99.     inline bool isASCIILower(unsigned short c) { return c >= 'a' && c <= 'z'; }
    100. 

  100. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    101. 

  101.     inline bool isASCIILower(wchar_t c) { return c >= 'a' && c <= 'z'; }
    102. 

  102. #endif
    103. 

  103.     inline bool isASCIILower(int c) { return c >= 'a' && c <= 'z'; }
    104. 

  104.     inline bool isASCIILower(unsigned c) { return c >= 'a' && c <= 'z'; }
    105. 

  105. 

  106.     inline bool isASCIIUpper(char c) { return c >= 'A' && c <= 'Z'; }
    107. 

  107.     inline bool isASCIIUpper(unsigned short c) { return c >= 'A' && c <= 'Z'; }
    108. 

  108. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    109. 

  109.     inline bool isASCIIUpper(wchar_t c) { return c >= 'A' && c <= 'Z'; }
    110. 

  110. #endif
    111. 

  111.     inline bool isASCIIUpper(int c) { return c >= 'A' && c <= 'Z'; }
    112. 

  112.     inline bool isASCIIUpper(unsigned c) { return c >= 'A' && c <= 'Z'; }
    113. 

  113. 

  114.     /*
    115. 

  115.         Statistics from a run of Apple's page load test for callers of isASCIISpace:
    116. 

    117. 

  117.             character          count
    118. 

  118.             ---------          -----
    119. 

  119.             non-spaces         689383
    120. 

  120.         20  space              294720
    121. 

  121.         0A  \n                 89059
    122. 

  122.         09  \t                 28320
    123. 

  123.         0D  \r                 0
    124. 

  124.         0C  \f                 0
    125. 

  125.         0B  \v                 0
    126. 

  126.     */
    127. 

  127.     inline bool isASCIISpace(char c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); }
    128. 

  128.     inline bool isASCIISpace(unsigned short c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); }
    129. 

  129. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    130. 

  130.     inline bool isASCIISpace(wchar_t c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); }
    131. 

  131. #endif
    132. 

  132.     inline bool isASCIISpace(int c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); }
    133. 

  133.     inline bool isASCIISpace(unsigned c) { return c <= ' ' && (c == ' ' || (c <= 0xD && c >= 0x9)); }
    134. 

  134. 

  135.     inline char toASCIILower(char c) { return c | ((c >= 'A' && c <= 'Z') << 5); }
    136. 

  136.     inline unsigned short toASCIILower(unsigned short c) { return c | ((c >= 'A' && c <= 'Z') << 5); }
    137. 

  137. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    138. 

  138.     inline wchar_t toASCIILower(wchar_t c) { return c | ((c >= 'A' && c <= 'Z') << 5); }
    139. 

  139. #endif
    140. 

  140.     inline int toASCIILower(int c) { return c | ((c >= 'A' && c <= 'Z') << 5); }
    141. 

  141.     inline unsigned toASCIILower(unsigned c) { return c | ((c >= 'A' && c <= 'Z') << 5); }
    142. 

  142. 

  143.     // FIXME: Why do these need static_cast?
    144. 

  144.     inline char toASCIIUpper(char c) { return static_cast<char>(c & ~((c >= 'a' && c <= 'z') << 5)); }
    145. 

  145.     inline unsigned short toASCIIUpper(unsigned short c) { return static_cast<unsigned short>(c & ~((c >= 'a' && c <= 'z') << 5)); }
    146. 

  146. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    147. 

  147.     inline wchar_t toASCIIUpper(wchar_t c) { return static_cast<wchar_t>(c & ~((c >= 'a' && c <= 'z') << 5)); }
    148. 

  148. #endif
    149. 

  149.     inline int toASCIIUpper(int c) { return static_cast<int>(c & ~((c >= 'a' && c <= 'z') << 5)); }
    150. 

  150.     inline unsigned toASCIIUpper(unsigned c) { return static_cast<unsigned>(c & ~((c >= 'a' && c <= 'z') << 5)); }
    151. 

  151. 

  152.     inline int toASCIIHexValue(char c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; }
    153. 

  153.     inline int toASCIIHexValue(unsigned short c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; }
    154. 

  154. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    155. 

  155.     inline int toASCIIHexValue(wchar_t c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; }
    156. 

  156. #endif
    157. 

  157.     inline int toASCIIHexValue(int c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; }
    158. 

  158.     inline int toASCIIHexValue(unsigned c) { ASSERT(isASCIIHexDigit(c)); return c < 'A' ? c - '0' : (c - 'A' + 10) & 0xF; }
    159. 

  159. 

  160.     inline bool isASCIIPrintable(char c) { return c >= ' ' && c <= '~'; }
    161. 

  161.     inline bool isASCIIPrintable(unsigned short c) { return c >= ' ' && c <= '~'; }
    162. 

  162. #if !WTF_COMPILER_MSVC || defined(_NATIVE_WCHAR_T_DEFINED)
    163. 

  163.     inline bool isASCIIPrintable(wchar_t c) { return c >= ' ' && c <= '~'; }
    164. 

  164. #endif
    165. 

  165.     inline bool isASCIIPrintable(int c) { return c >= ' ' && c <= '~'; }
    166. 

  166.     inline bool isASCIIPrintable(unsigned c) { return c >= ' ' && c <= '~'; }
    167. 

  167. }
    168. 

  168. 

  169. using WTF::isASCII;
    170. 

  170. using WTF::isASCIIAlpha;
    171. 

  171. using WTF::isASCIIAlphanumeric;
    172. 

  172. using WTF::isASCIIDigit;
    173. 

  173. using WTF::isASCIIHexDigit;
    174. 

  174. using WTF::isASCIILower;
    175. 

  175. using WTF::isASCIIOctalDigit;
    176. 

  176. using WTF::isASCIIPrintable;
    177. 

  177. using WTF::isASCIISpace;
    178. 

  178. using WTF::isASCIIUpper;
    179. 

  179. using WTF::toASCIIHexValue;
    180. 

  180. using WTF::toASCIILower;
    181. 

  181. using WTF::toASCIIUpper;
    182. 

  182. 

  183. #endif
    184.