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/***
*mbsnbicmp.c - Compare n bytes of strings, ignoring case (MBCS)
*
* Copyright (c) 1985-1993, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Compare n bytes of strings, ignoring case (MBCS)
*
*Revision History:
* 08-03-93 KRS Ported from 16-bit sources.
* 10-12-93 CFW Compare lower case, not upper.
*
*******************************************************************************/
#ifdef _MBCS
#include <cruntime.h>
#include <mbdata.h>
#include <mbctype.h>
#include <mbstring.h>
/***
* _mbsnbicmp - Compare n bytes of strings, ignoring case (MBCS)
*
*Purpose:
* Compares up to n bytes of two strings for lexical order.
* Strings are compared on a character basis, not a byte basis.
* Case of characters is not considered.
*
*Entry:
* unsigned char *s1, *s2 = strings to compare
* size_t n = maximum number of bytes to compare
*
*Exit:
* returns <0 if s1 < s2
* returns 0 if s1 == s2
* returns >0 if s1 > s2
*
*Exceptions:
*
*******************************************************************************/
int _CRTAPI1 _mbsnbicmp(s1, s2, n)
const unsigned char *s1, *s2;
size_t n;
{
unsigned short c1, c2;
if (n==0)
return(0);
while (n--) {
c1 = *s1++;
if (_ISLEADBYTE(c1)) {
if (n==0)
break;
if (*s1 == '\0')
c1 = 0;
else {
c1 = ((c1<<8) | *s1++);
#ifndef _MBCS_OS
if ( (_mbascii) &&
((c1 >= _MBUPPERLOW) && (c1 <= _MBUPPERHIGH))
)
c1 += _MBCASEDIFF;
#endif
}
}
else
c1 = tolower(c1);
c2 = *s2++;
if (_ISLEADBYTE(c2)) {
if (n--==0)
break;
if (*s2 == '\0')
c2 = 0;
else {
c2 = ((c2<<8) | *s2++);
#ifndef _MBCS_OS
if ( (_mbascii) &&
((c2 >= _MBUPPERLOW) && (c2 <= _MBUPPERHIGH))
)
c2 += _MBCASEDIFF;
#endif
}
}
else
c2 = tolower(c2);
if (c1 != c2)
return( (c1 > c2) ? 1 : -1);
if (c1 == 0)
return(0);
}
return(0);
}
#endif /* _MBCS */
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