Format
#include <wchar.h>
size_t wcscspn(const wchar_t *string1, const wchar_t *string2);Language Level: XPG4
Threadsafe: Yes.
Wide Character Function: See Wide Characters for more information.
Description
The wcscspn() function determines the number of wchar_t characters in the initial segment of the string pointed to by string1 that do not appear in the string pointed to by string2.
The wcscspn() function operates on null-ended wchar_t strings; string arguments to this function should contain a wchar_t null character marking the end of the string.
Return Value
The wcscspn() function returns the number of wchar_t characters in the segment.
Example that uses wcscspn()
This example uses wcscspn() to find the first occurrence of any of the characters a, x, l, or e in string.
#include <stdio.h>
#include <wchar.h>
#define SIZE 40
int main(void)
{
wchar_t string[SIZE] = L"This is the source string";
wchar_t * substring = L"axle";
printf( "The first %i characters in the string \"%ls\" are not in the "
"string \"%ls\" \n", wcscspn( string, substring),
string, substring );
}
/**************** Output should be similar to: ******************
The first 10 characters in the string "This is the source string" are not
in the string "axle"
*/Related Information