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68 lines
2.1 KiB
68 lines
2.1 KiB
/***
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*wcscspn.c - find length of initial substring of wide characters
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* not in a control string
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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 wcscspn()- finds the length of the initial substring of
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* a string consisting entirely of characters not in a control string
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* (wide-character strings).
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*
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*Revision History:
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* 11-04-91 ETC Created with source from crtdll.
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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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* 02-27-98 RKP Added 64 bit support.
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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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*size_t wcscspn(string, control) - search for init substring w/o control wchars
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*
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*Purpose:
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* returns the index of the first character in string that belongs
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* to the set of characters specified by control. This is equivalent
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* to the length of the length of the initial substring of string
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* composed entirely of characters not in control. Null chars not
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* considered (wide-character strings).
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*
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*Entry:
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* wchar_t *string - string to search
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* wchar_t *control - set of characters not allowed in init substring
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*
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*Exit:
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* returns the index of the first wchar_t in string
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* that is in the set of characters specified by control.
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*
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*Exceptions:
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*
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*******************************************************************************/
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size_t __cdecl wcscspn (
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const wchar_t * string,
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const wchar_t * control
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)
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{
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wchar_t *str = (wchar_t *) string;
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wchar_t *wcset;
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/* 1st char in control string stops search */
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while (*str) {
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for (wcset = (wchar_t *)control; *wcset; wcset++) {
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if (*wcset == *str) {
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return (size_t)(str - string);
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}
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}
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str++;
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}
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return (size_t)(str - string);
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}
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#endif /* _POSIX_ */
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