55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
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/***
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*wcscmp.c - routine to compare 2 wide character strings (equal/less/greater)
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*
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* Copyright (c) 1985-1988, Microsoft Corporation. All Rights Reserved.
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*
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*Purpose:
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* Compares two wide character strings, determining their lexical order.
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*
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*Revision History:
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* 04-07-91 IanJa C version created.
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*
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*******************************************************************************/
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#include <stdlib.h>
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/***
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*wcscmp - compare two wide character strings, returning less than, equal to,
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* or greater than
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*
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*Purpose:
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* WCSCMP compares two wide character strings and returns an integer
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* to indicate whether the first is less than the second, the two are
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* equal, or whether the first is greater than the second.
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*
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* Comparison is done byte by byte on an UNSIGNED basis, which is to
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* say that Null (0) is less than any other character (1-0xffff).
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*
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*Entry:
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* const wchar_t * src - string for left-hand side of comparison
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* const wchar_t * dst - string for right-hand side of comparison
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*
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*Exit:
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* returns -1 if src < dst
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* returns 0 if src == dst
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* returns +1 if src > dst
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*
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*Exceptions:
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*
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*******************************************************************************/
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int __cdecl wcscmp(const wchar_t * src, const wchar_t * dst)
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{
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int ret = 0 ;
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while( ! (ret = *src - *dst) && *dst)
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++src, ++dst;
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if ( ret < 0 )
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ret = -1 ;
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else if ( ret > 0 )
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ret = 1 ;
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return ret;
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}
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