src/lib/string/compat_ctype.c

   1 /* Copyright (c) 2003-2004, Roger Dingledine
   2  * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
   3  * Copyright (c) 2007-2021, The Tor Project, Inc. */
   4 /* See LICENSE for licensing information */
   5
   6 /**
   7  * \file compat_ctype.c
   8  * \brief Locale-independent character-type inspection (backend)
   9  **/
  10
  11 #include "lib/string/compat_ctype.h"
  12
  13 /**
  14  * Tables to implement ctypes-replacement TOR_IS*() functions.  Each table
  15  * has 256 bits to look up whether a character is in some set or not.  This
  16  * fails on non-ASCII platforms, but it is hard to find a platform whose
  17  * character set is not a superset of ASCII nowadays. */
  18
  19 /**@{*/
  20 const uint32_t TOR_ISALPHA_TABLE[8] =
  21   { 0, 0, 0x7fffffe, 0x7fffffe, 0, 0, 0, 0 };
  22 const uint32_t TOR_ISALNUM_TABLE[8] =
  23   { 0, 0x3ff0000, 0x7fffffe, 0x7fffffe, 0, 0, 0, 0 };
  24 const uint32_t TOR_ISSPACE_TABLE[8] = { 0x3e00, 0x1, 0, 0, 0, 0, 0, 0 };
  25 const uint32_t TOR_ISXDIGIT_TABLE[8] =
  26   { 0, 0x3ff0000, 0x7e, 0x7e, 0, 0, 0, 0 };
  27 const uint32_t TOR_ISDIGIT_TABLE[8] = { 0, 0x3ff0000, 0, 0, 0, 0, 0, 0 };
  28 const uint32_t TOR_ISPRINT_TABLE[8] =
  29   { 0, 0xffffffff, 0xffffffff, 0x7fffffff, 0, 0, 0, 0x0 };
  30 const uint32_t TOR_ISUPPER_TABLE[8] = { 0, 0, 0x7fffffe, 0, 0, 0, 0, 0 };
  31 const uint32_t TOR_ISLOWER_TABLE[8] = { 0, 0, 0, 0x7fffffe, 0, 0, 0, 0 };
  32 /**@}*/
  33
  34 /** Upper-casing and lowercasing tables to map characters to upper/lowercase
  35  * equivalents.  Used by tor_toupper() and tor_tolower(). */
  36 /**@{*/
  37 const uint8_t TOR_TOUPPER_TABLE[256] = {
  38   0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
  39   16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,
  40   32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,
  41   48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,
  42   64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,
  43   80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,
  44   96,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,
  45   80,81,82,83,84,85,86,87,88,89,90,123,124,125,126,127,
  46   128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
  47   144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
  48   160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
  49   176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
  50   192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
  51   208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
  52   224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
  53   240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,
  54 };
  55 const uint8_t TOR_TOLOWER_TABLE[256] = {
  56   0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
  57   16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,
  58   32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,
  59   48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,
  60   64,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,
  61   112,113,114,115,116,117,118,119,120,121,122,91,92,93,94,95,
  62   96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,
  63   112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
  64   128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
  65   144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
  66   160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
  67   176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
  68   192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
  69   208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
  70   224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
  71   240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,
  72 };
  73 /**@}*/