64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
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/***
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*wcsncmp.c - compare first n characters of two wide-character strings
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines wcsncmp() - compare first n characters of two wchar_t strings
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* for lexical order.
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*
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*Revision History:
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* 09-09-91 ETC Created from strncmp.c.
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* 04-07-92 KRS Updated and ripped out _INTL switches.
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* 04-06-93 SKS Replace _CRTAPI* with __cdecl
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* 02-07-94 CFW POSIXify.
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*
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*******************************************************************************/
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#ifndef _POSIX_
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#include <cruntime.h>
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#include <string.h>
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/***
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*int wcsncmp(first, last, count) - compare first count chars of wchar_t strings
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*
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*Purpose:
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* Compares two strings for lexical order. The comparison stops
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* after: (1) a difference between the strings is found, (2) the end
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* of the strings is reached, or (3) count characters have been
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* compared (wide-character strings).
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*
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*Entry:
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* wchar_t *first, *last - strings to compare
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* size_t count - maximum number of characters to compare
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*
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*Exit:
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* returns <0 if first < last
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* returns 0 if first == last
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* returns >0 if first > last
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*
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*Exceptions:
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*
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*******************************************************************************/
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int __cdecl wcsncmp (
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const wchar_t * first,
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const wchar_t * last,
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size_t count
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)
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{
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if (!count)
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return(0);
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while (--count && *first && *first == *last)
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{
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first++;
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last++;
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}
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return((int)(*first - *last));
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}
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#endif /* _POSIX_ */
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