73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
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/***
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*wcsstr.c - search for one wide-character string inside another
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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 wcsstr() - search for one wchar_t string inside another
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*
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*Revision History:
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* 09-09-91 ETC Created from strstr.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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* 08-02-00 GB fixed str2 = ""
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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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*wchar_t *wcsstr(string1, string2) - search for string2 in string1
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* (wide strings)
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*
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*Purpose:
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* finds the first occurrence of string2 in string1 (wide strings)
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*
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*Entry:
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* wchar_t *string1 - string to search in
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* wchar_t *string2 - string to search for
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*
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*Exit:
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* returns a pointer to the first occurrence of string2 in
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* string1, or NULL if string2 does not occur in string1
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*
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*Uses:
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*
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*Exceptions:
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*
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*******************************************************************************/
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wchar_t * __cdecl wcsstr (
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const wchar_t * wcs1,
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const wchar_t * wcs2
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)
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{
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wchar_t *cp = (wchar_t *) wcs1;
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wchar_t *s1, *s2;
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if ( !*wcs2)
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return (wchar_t *)wcs1;
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while (*cp)
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{
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s1 = cp;
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s2 = (wchar_t *) wcs2;
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while ( *s1 && *s2 && !(*s1-*s2) )
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s1++, s2++;
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if (!*s2)
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return(cp);
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cp++;
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}
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return(NULL);
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}
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#endif /* _POSIX_ */
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