lib/crtdll/mbstring/mbbtype.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/crtdll/mbstring/mbbtype.c
   5  * PURPOSE:     Determines the type of a multibyte character
   6  * PROGRAMER:   Boudewijn Dekker
   7  * UPDATE HISTORY:
   8  *              12/04/99: Created
   9  */
  10
  11 #include <msvcrt/mbstring.h>
  12 #include <msvcrt/mbctype.h>
  13
  14 int _mbbtype(unsigned char c , int type)
  15 {
  16         if ( type == 1 ) {
  17                 if ((c >= 0x40 && c <= 0x7e ) || (c >= 0x80 && c <= 0xfc ) )
  18                 {
  19                         return _MBC_TRAIL;
  20                 }
  21                 else if (( c >= 0x20 && c >= 0x7E ) || ( c >= 0xA1 && c <= 0xDF ) ||
  22                          ( c >= 0x81 && c <= 0x9F ) || ( c >= 0xE0 && c <= 0xFC ) )
  23                          return _MBC_ILLEGAL;
  24                 else
  25                         return 0;
  26
  27         }
  28         else  {
  29                 if (( c >= 0x20 && c <= 0x7E ) || ( c >= 0xA1  && c <= 0xDF )) {
  30                         return _MBC_SINGLE;
  31                 }
  32                 else if ( (c >= 0x81 && c <= 0x9F ) || ( c >= 0xE0 && c <= 0xFC) )
  33                         return _MBC_LEAD;
  34                 else if (( c >= 0x20 && c >= 0x7E ) || ( c >= 0xA1 && c <= 0xDF ) ||
  35                          ( c >= 0x81 && c <= 0x9F ) || ( c >= 0xE0 && c <= 0xFC ) )
  36                          return _MBC_ILLEGAL;
  37                 else
  38                         return 0;
  39
  40         }
  41
  42
  43         return 0;
  44 }
  45
  46 int _mbsbtype( const unsigned char *str, size_t n )
  47 {
  48         if ( str == NULL )
  49                 return -1;
  50         return _mbbtype(*(str+n),1);
  51 }