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 /*
  15  * @implemented
  16  */
  17 int _mbsicmp(const unsigned char *str1, const unsigned char *str2)
  18 {
  19         unsigned char *s1 = (unsigned char *)str1;
  20         unsigned char *s2 = (unsigned char *)str2;
  21
  22         unsigned short *short_s1, *short_s2;
  23
  24         int l1, l2;
  25
  26         do {
  27
  28                 if (*s1 == 0)
  29                         break;
  30
  31                 l1 = _ismbblead(*s1);
  32                 l2 = _ismbblead(*s2);
  33                 if ( !l1 &&  !l2  ) {
  34
  35                         if (toupper(*s1) != toupper(*s2))
  36                                 return toupper(*s1) - toupper(*s2);
  37                         else {
  38                                 s1 += 1;
  39                                 s2 += 1;
  40                         }
  41                 }
  42                 else if ( l1 && l2 ){
  43                         short_s1 = (unsigned short *)s1;
  44                         short_s2 = (unsigned short *)s2;
  45                         if ( _mbctoupper(*short_s1) != _mbctoupper(*short_s2 ))
  46                                 return _mbctoupper(*short_s1) - _mbctoupper(*short_s2);
  47                         else {
  48                                 s1 += 2;
  49                                 s2 += 2;
  50                         }
  51                 }
  52                 else
  53                         return *s1 - *s2;
  54         } while (*s1 != 0);
  55         return 0;
  56
  57   while (toupper(*s1) == toupper(*s2))
  58   {
  59     if (*s1 == 0)
  60       return 0;
  61     s1++;
  62     s2++;
  63   }
  64   return toupper(*(unsigned const char *)s1) - toupper(*(unsigned const char *)(s2));
  65 }