tcrt/src/ctype.cpp

   1 /*=============================================================================
   2         ctype.cpp :
   3
   4         Copyright © 2008 Bruno Santos <nayart3@gmail.com>
   5 =============================================================================*/
   6
   7 ///////////////////////////////////////////////////////////////////////////////
   8 #include <ctype.h>
   9 #include <errno.h>
  10
  11 ///////////////////////////////////////////////////////////////////////////////
  12 enum {
  13         UP = tcrt_ctype_flag_upper,
  14         LO = tcrt_ctype_flag_lower,
  15         CT = tcrt_ctype_flag_cntrl,
  16         DG = tcrt_ctype_flag_digit,
  17         PT = tcrt_ctype_flag_punct,
  18         HX = tcrt_ctype_flag_xdigit,
  19         SP = tcrt_ctype_flag_space
  20 };
  21
  22 ///////////////////////////////////////////////////////////////////////////////
  23 namespace {
  24         const unsigned char TypeLookup[128] = {
  25                 CT, CT, CT, CT, CT, CT, CT, CT, CT,             //0 - 31
  26                 CT|SP, CT|SP, CT|SP, CT|SP, CT|SP,
  27                 CT, CT, CT, CT, CT, CT, CT, CT, CT,
  28                 CT, CT, CT, CT, CT, CT, CT, CT, CT,
  29
  30                 SP,                                             //32
  31
  32                 PT, PT, PT, PT, PT, PT, PT, PT,                 //33 - 47
  33                 PT, PT, PT, PT, PT, PT, PT,
  34
  35                 DG, DG, DG, DG, DG, DG, DG, DG,                 //48 - 57
  36                 DG, DG,
  37
  38                 PT, PT, PT, PT, PT, PT, PT,                     //58 - 64
  39
  40                 UP|HX, UP|HX, UP|HX, UP|HX, UP|HX, UP|HX,       //65 - 90
  41                 UP, UP, UP, UP, UP, UP, UP, UP, UP, UP,
  42                 UP, UP, UP, UP, UP, UP, UP, UP, UP, UP,
  43
  44                 PT, PT, PT, PT, PT, PT,                         //91 - 96
  45
  46                 LO|HX, LO|HX, LO|HX, LO|HX, LO|HX, LO|HX,       //97 - 122
  47                 LO, LO, LO, LO, LO, LO, LO, LO, LO, LO,
  48                 LO, LO, LO, LO, LO, LO, LO, LO, LO, LO,
  49
  50                 PT, PT, PT, PT,                                 //123 - 126
  51
  52                 CT                                              //127
  53         };
  54 }
  55
  56 ///////////////////////////////////////////////////////////////////////////////
  57 int tolower(int c)
  58 {
  59         if (isupper(c))
  60                 return c - 'A' + 'a';
  61         return c;
  62 }
  63
  64 int toupper(int c)
  65 {
  66         if (islower(c))
  67                 return c - 'a' + 'A';
  68         return c;
  69 }
  70
  71 int tcrt_ctype(int c)
  72 {
  73         if (c < 128)
  74                 return TypeLookup[c];
  75
  76         __debugbreak();
  77         return 0;
  78 }
  79
  80 // EOF ////////////////////////////////////////////////////////////////////////