lib/crtdll/mbstring/mbsicmp.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/crtdll/mbstring/mbsicmp.c
   5  * PURPOSE:     Duplicates a multi byte string
   6  * PROGRAMER:   Boudewijn Dekker
   7  * UPDATE HISTORY:
   8  *              12/04/99: Created
   9  */
  10 #include <msvcrt/mbstring.h>
  11 #include <msvcrt/mbctype.h>
  12 #include <msvcrt/ctype.h>
  13
  14 int _mbsicmp(const unsigned char *str1, const unsigned char *str2)
  15 {
  16         unsigned char *s1 = (unsigned char *)str1;
  17         unsigned char *s2 = (unsigned char *)str2;
  18
  19         unsigned short *short_s1, *short_s2;
  20
  21         int l1, l2;
  22
  23         do {
  24
  25                 if (*s1 == 0)
  26                         break;
  27
  28                 l1 = _ismbblead(*s1);
  29                 l2 = _ismbblead(*s2);
  30                 if ( !l1 &&  !l2  ) {
  31
  32                         if (toupper(*s1) != toupper(*s2))
  33                                 return toupper(*s1) - toupper(*s2);
  34                         else {
  35                                 s1 += 1;
  36                                 s2 += 1;
  37                         }
  38                 }
  39                 else if ( l1 && l2 ){
  40                         short_s1 = (unsigned short *)s1;
  41                         short_s2 = (unsigned short *)s2;
  42                         if ( _mbctoupper(*short_s1) != _mbctoupper(*short_s2 ))
  43                                 return _mbctoupper(*short_s1) - _mbctoupper(*short_s2);
  44                         else {
  45                                 s1 += 2;
  46                                 s2 += 2;
  47                         }
  48                 }
  49                 else
  50                         return *s1 - *s2;
  51         } while (*s1 != 0);
  52         return 0;
  53
  54   while (toupper(*s1) == toupper(*s2))
  55   {
  56     if (*s1 == 0)
  57       return 0;
  58     s1++;
  59     s2++;
  60   }
  61   return toupper(*(unsigned const char *)s1) - toupper(*(unsigned const char *)(s2));
  62 }