wcsspn - Man Page

get length of a prefix wide-character substring

Library

Standard C library (libc, -lc)

Synopsis

#include <wchar.h>

size_t wcsspn(const wchar_t *wcs, const wchar_t *accept);

Description

The wcsspn() function is the wide-character equivalent of the strspn(3) function. It determines the length of the longest initial segment of wcs which consists entirely of wide-characters listed in accept. In other words, it searches for the first occurrence in the wide-character string wcs of a wide-character not contained in the wide-character string accept.

Return Value

The wcsspn() function returns the number of wide characters in the longest initial segment of wcs which consists entirely of wide-characters listed in accept. In other words, it returns the position of the first occurrence in the wide-character string wcs of a wide-character not contained in the wide-character string accept, or wcslen(wcs) if there is none.

Attributes

For an explanation of the terms used in this section, see attributes(7).

InterfaceAttributeValue
wcsspn()Thread safetyMT-Safe

Standards

POSIX.1-2001, POSIX.1-2008, C99.

See Also

strspn(3), wcscspn(3)

Referenced By

signal-safety(7), strspn(3), wcscspn(3).

2022-12-15 Linux man-pages 6.02