ReactOS Development > Doxygen

00001 /*
00002  * COPYRIGHT:   See COPYING in the top level directory
00003  * PROJECT:     ReactOS system libraries
00004  * FILE:        lib/msvcrt/mbstring/mbsncoll.c
00005  * PURPOSE:
00006  * PROGRAMER:   Ariadne
00007  * UPDATE HISTORY:
00008  *              12/04/99: Created
00009  */
00010 #include <mbstring.h>
00011 
00012 
00013 int colldif(unsigned short c1, unsigned short c2)
00014 {
00015   return c1 - c2;
00016 }
00017 
00018 /*
00019  * @implemented
00020  */
00021 int _mbsncoll(const unsigned char *str1, const unsigned char *str2, size_t n)
00022 {
00023     unsigned char *s1 = (unsigned char *)str1;
00024     unsigned char *s2 = (unsigned char *)str2;
00025 
00026     unsigned short *short_s1, *short_s2;
00027 
00028     int l1, l2;
00029 
00030     if (n == 0)
00031         return 0;
00032     do {
00033 
00034         if (*s1 == 0)
00035             break;
00036 
00037         l1 = _ismbblead(*s1);
00038         l2 = _ismbblead(*s2);
00039         if ( !l1 &&  !l2  ) {
00040 
00041             if (*s1 != *s2)
00042                 return colldif(*s1, *s2);
00043             else {
00044                 s1 += 1;
00045                 s2 += 1;
00046                 n--;
00047             }
00048         }
00049         else if ( l1 && l2 ){
00050             short_s1 = (unsigned short *)s1;
00051             short_s2 = (unsigned short *)s2;
00052             if ( *short_s1 != *short_s2 )
00053                 return colldif(*short_s1, *short_s2);
00054             else {
00055                 s1 += 2;
00056                 s2 += 2;
00057                 n--;
00058 
00059             }
00060         }
00061         else
00062             return colldif(*s1, *s2);
00063     } while (n > 0);
00064     return 0;
00065 }
00066 
00067 /*
00068  * @implemented
00069  */
00070 int _mbsnbcoll(const unsigned char *str1, const unsigned char *str2, size_t n)
00071 {
00072     unsigned char *s1 = (unsigned char *)str1;
00073     unsigned char *s2 = (unsigned char *)str2;
00074 
00075     unsigned short *short_s1, *short_s2;
00076 
00077     int l1, l2;
00078 
00079     if (n == 0)
00080         return 0;
00081     do {
00082 
00083         if (*s1 == 0)
00084             break;
00085 
00086         l1 = _ismbblead(*s1);
00087         l2 = _ismbblead(*s2);
00088         if ( !l1 &&  !l2  ) {
00089 
00090             if (*s1 != *s2)
00091                 return colldif(*s1, *s2);
00092             else {
00093                 s1 += 1;
00094                 s2 += 1;
00095                 n--;
00096             }
00097         }
00098         else if ( l1 && l2 ){
00099             short_s1 = (unsigned short *)s1;
00100             short_s2 = (unsigned short *)s2;
00101             if ( *short_s1 != *short_s2 )
00102                 return colldif(*short_s1, *short_s2);
00103             else {
00104                 s1 += 2;
00105                 s2 += 2;
00106                 n-=2;
00107 
00108             }
00109         }
00110         else
00111             return colldif(*s1, *s2);
00112     } while (n > 0);
00113     return 0;
00114 }
00115
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