69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
|
/***
|
||
|
|
*wcscspn.c - find length of initial substring of wide characters
|
||
|
|
* not in a control string
|
||
|
|
*
|
||
|
|
* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* defines wcscspn()- finds the length of the initial substring of
|
||
|
|
* a string consisting entirely of characters not in a control string
|
||
|
|
* (wide-character strings).
|
||
|
|
*
|
||
|
|
*Revision History:
|
||
|
|
* 11-04-91 ETC Created with source from crtdll.
|
||
|
|
* 04-07-92 KRS Updated and ripped out _INTL switches.
|
||
|
|
* 04-06-93 SKS Replace _CRTAPI* with __cdecl
|
||
|
|
* 02-07-94 CFW POSIXify.
|
||
|
|
* 02-27-98 RKP Added 64 bit support.
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
#ifndef _POSIX_
|
||
|
|
|
||
|
|
#include <cruntime.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
/***
|
||
|
|
*size_t wcscspn(string, control) - search for init substring w/o control wchars
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* returns the index of the first character in string that belongs
|
||
|
|
* to the set of characters specified by control. This is equivalent
|
||
|
|
* to the length of the length of the initial substring of string
|
||
|
|
* composed entirely of characters not in control. Null chars not
|
||
|
|
* considered (wide-character strings).
|
||
|
|
*
|
||
|
|
*Entry:
|
||
|
|
* wchar_t *string - string to search
|
||
|
|
* wchar_t *control - set of characters not allowed in init substring
|
||
|
|
*
|
||
|
|
*Exit:
|
||
|
|
* returns the index of the first wchar_t in string
|
||
|
|
* that is in the set of characters specified by control.
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
size_t __cdecl wcscspn (
|
||
|
|
const wchar_t * string,
|
||
|
|
const wchar_t * control
|
||
|
|
)
|
||
|
|
{
|
||
|
|
wchar_t *str = (wchar_t *) string;
|
||
|
|
wchar_t *wcset;
|
||
|
|
|
||
|
|
/* 1st char in control string stops search */
|
||
|
|
while (*str) {
|
||
|
|
for (wcset = (wchar_t *)control; *wcset; wcset++) {
|
||
|
|
if (*wcset == *str) {
|
||
|
|
return (size_t)(str - string);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
str++;
|
||
|
|
}
|
||
|
|
return (size_t)(str - string);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _POSIX_ */
|