70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
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/***
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*mbsncmp.c - Compare n characters of two MBCS strings
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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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* Compare n characters of two MBCS strings
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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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*
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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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*int mbsncmp(s1, s2, n) - Compare n characters of two MBCS strings
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*
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*Purpose:
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* Compares up to n charcters of two strings for lexical order.
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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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* unsigned char *s1, *s2 = strings to compare
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* size_t n = maximum number of characters 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 _mbsncmp( s1, s2, n )
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const unsigned char *s1;
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const unsigned char *s2;
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size_t n;
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{
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unsigned short c1, c2;
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if (n==0)
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return(0);
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while (n--) {
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c1 = *s1++;
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if (_ISLEADBYTE(c1))
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c1 = ( (*s1 == '\0') ? 0 : ((c1<<8) | *s1++) );
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c2 = *s2++;
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if (_ISLEADBYTE(c2))
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c2 = ( (*s2 == '\0') ? 0 : ((c2<<8) | *s2++) );
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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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return(0);
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}
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#endif /* _MBCS */
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