Format
#include <wcstr.h> size_t wcscspn(const wchar_t *string1, const wchar_t *string2);
Language Level: XPG4
wcscspn 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.
wcscspn operates on null-terminated wchar_t strings; string arguments to this function should contain a wchar_t null character marking the end of the string.
Return Value
wcscspn returns the number of wchar_t characters in the
segment.
Example
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 <wcstr.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 );
return 0;
/****************************************************************************
The output should be:
The first 10 characters in the string "This is the source string" are
not in the string "axle"
****************************************************************************/
}
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strcspn -- Compare Strings for Substrings
strspn -- Search Strings
wcsspn -- Search Wide-Character
Strings
wcswcs -- Locate Wide-Character
Substring
wcscat -- Concatenate Wide-Character
Strings
wcschr -- Search for Wide Character
wcscmp -- Compare Wide-Character
Strings
wcscpy -- Copy Wide-Character Strings
wcslen -- Calculate Length of
Wide-Character String
<wcstr.h>