reactos/sdk/lib/crt/mbstring/mbsncoll.c

116 lines
1.8 KiB
C

/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
* FILE: lib/sdk/crt/mbstring/mbsncoll.c
* PURPOSE:
* PROGRAMER: Ariadne
* UPDATE HISTORY:
* 12/04/99: Created
*/
#include <mbstring.h>
int colldif(unsigned short c1, unsigned short c2)
{
return c1 - c2;
}
/*
* @implemented
*/
int _mbsncoll(const unsigned char *str1, const unsigned char *str2, size_t n)
{
unsigned char *s1 = (unsigned char *)str1;
unsigned char *s2 = (unsigned char *)str2;
unsigned short *short_s1, *short_s2;
int l1, l2;
if (n == 0)
return 0;
do {
if (*s1 == 0)
break;
l1 = _ismbblead(*s1);
l2 = _ismbblead(*s2);
if ( !l1 && !l2 ) {
if (*s1 != *s2)
return colldif(*s1, *s2);
else {
s1 += 1;
s2 += 1;
n--;
}
}
else if ( l1 && l2 ){
short_s1 = (unsigned short *)s1;
short_s2 = (unsigned short *)s2;
if ( *short_s1 != *short_s2 )
return colldif(*short_s1, *short_s2);
else {
s1 += 2;
s2 += 2;
n--;
}
}
else
return colldif(*s1, *s2);
} while (n > 0);
return 0;
}
/*
* @implemented
*/
int _mbsnbcoll(const unsigned char *str1, const unsigned char *str2, size_t n)
{
unsigned char *s1 = (unsigned char *)str1;
unsigned char *s2 = (unsigned char *)str2;
unsigned short *short_s1, *short_s2;
int l1, l2;
if (n == 0)
return 0;
do {
if (*s1 == 0)
break;
l1 = _ismbblead(*s1);
l2 = _ismbblead(*s2);
if ( !l1 && !l2 ) {
if (*s1 != *s2)
return colldif(*s1, *s2);
else {
s1 += 1;
s2 += 1;
n--;
}
}
else if ( l1 && l2 ){
short_s1 = (unsigned short *)s1;
short_s2 = (unsigned short *)s2;
if ( *short_s1 != *short_s2 )
return colldif(*short_s1, *short_s2);
else {
s1 += 2;
s2 += 2;
n-=2;
}
}
else
return colldif(*s1, *s2);
} while (n > 0);
return 0;
}