reactos/lib/crtdll/mbstring/mbsncoll.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/crtdll/mbstring/mbsncoll.c
   5  * PURPOSE:
   6  * PROGRAMER:   Boudewijn Dekker
   7  * UPDATE HISTORY:
   8  *              12/04/99: Created
   9  */
  10 #include <crtdll/mbstring.h>
  11
  12 int colldif(unsigned short c1, unsigned short c2);
  13
  14 int _mbsncoll(const unsigned char *str1, const unsigned char *str2, size_t n)
  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         if (n == 0)
  24                 return 0;
  25         do {
  26
  27                 if (*s1 == 0)
  28                         break;
  29
  30                 l1 = _ismbblead(*s1);
  31                 l2 = _ismbblead(*s2);
  32                 if ( !l1 &&  !l2  ) {
  33
  34                         if (*s1 != *s2)
  35                                 return colldif(*s1, *s2);
  36                         else {
  37                                 s1 += 1;
  38                                 s2 += 1;
  39                                 n--;
  40                         }
  41                 }
  42                 else if ( l1 && l2 ){
  43                         short_s1 = (unsigned short *)s1;
  44                         short_s2 = (unsigned short *)s2;
  45                         if ( *short_s1 != *short_s2 )
  46                                 return colldif(*short_s1, *short_s2);
  47                         else {
  48                                 s1 += 2;
  49                                 s2 += 2;
  50                                 n--;
  51
  52                         }
  53                 }
  54                 else
  55                         return colldif(*s1, *s2);
  56         } while (n > 0);
  57         return 0;
  58 }
  59
  60 int _mbsnbcoll(const unsigned char *str1, const unsigned char *str2, size_t n)
  61 {
  62         unsigned char *s1 = (unsigned char *)str1;
  63         unsigned char *s2 = (unsigned char *)str2;
  64
  65         unsigned short *short_s1, *short_s2;
  66
  67         int l1, l2;
  68
  69         if (n == 0)
  70                 return 0;
  71         do {
  72
  73                 if (*s1 == 0)
  74                         break;
  75
  76                 l1 = _ismbblead(*s1);
  77                 l2 = _ismbblead(*s2);
  78                 if ( !l1 &&  !l2  ) {
  79
  80                         if (*s1 != *s2)
  81                                 return colldif(*s1, *s2);
  82                         else {
  83                                 s1 += 1;
  84                                 s2 += 1;
  85                                 n--;
  86                         }
  87                 }
  88                 else if ( l1 && l2 ){
  89                         short_s1 = (unsigned short *)s1;
  90                         short_s2 = (unsigned short *)s2;
  91                         if ( *short_s1 != *short_s2 )
  92                                 return colldif(*short_s1, *short_s2);
  93                         else {
  94                                 s1 += 2;
  95                                 s2 += 2;
  96                                 n-=2;
  97
  98                         }
  99                 }
 100                 else
 101                         return colldif(*s1, *s2);
 102         } while (n > 0);
 103         return 0;
 104 }
 105
 106 int colldif(unsigned short c1, unsigned short c2)
 107 {
 108         return c1 - c2;
 109 }