91 lines
1.8 KiB
C
91 lines
1.8 KiB
C
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/***
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*mbsicmp.c - Case-insensitive string comparision routine (MBCS)
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*
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* Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Case-insensitive string comparision routine (MBCS)
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*
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*Revision History:
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* 11-19-92 KRS Ported from 16-bit sources.
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* 10-12-93 CFW Compare lower case, not upper.
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*
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*******************************************************************************/
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#ifdef _MBCS
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#include <cruntime.h>
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#include <mbdata.h>
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#include <mbctype.h>
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#include <mbstring.h>
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/***
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* _mbsicmp - Case-insensitive string comparision routine (MBCS)
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*
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*Purpose:
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* Compares two strings for lexical order without regard to case.
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* Strings are compared on a character basis, not a byte basis.
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*
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*Entry:
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* char *s1, *s2 = strings to compare
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*
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*Exit:
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* returns <0 if s1 < s2
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* returns 0 if s1 == s2
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* returns >0 if s1 > s2
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*
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*Exceptions:
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*
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*******************************************************************************/
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int _CRTAPI1 _mbsicmp(s1, s2)
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const unsigned char *s1, *s2;
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{
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unsigned short c1, c2;
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for (;;) {
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c1 = *s1++;
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if (_ISLEADBYTE(c1)) {
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if (*s1 == '\0')
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c1 = 0;
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else {
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c1 = ((c1<<8) | *s1++);
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#ifndef _MBCS_OS
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if ( (_mbascii) &&
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((c1 >= _MBUPPERLOW) && (c1 <= _MBUPPERHIGH))
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)
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c1 += _MBCASEDIFF;
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#endif
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}
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}
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else
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c1 = tolower(c1);
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c2 = *s2++;
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if (_ISLEADBYTE(c2)) {
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if (*s2 == '\0')
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c2 = 0;
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else {
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c2 = ((c2<<8) | *s2++);
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#ifndef _MBCS_OS
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if ( (_mbascii) &&
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((c2 >= _MBUPPERLOW) && (c2 <= _MBUPPERHIGH))
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)
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c2 += _MBCASEDIFF;
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#endif
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}
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}
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else
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c2 = tolower(c2);
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if (c1 != c2)
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return( (c1 > c2) ? 1 : -1);
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if (c1 == 0)
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return(0);
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}
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}
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#endif /* _MBCS */
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