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wcsspn(3) Library Functions Manual wcsspn(3)

NAME

wcsspn - 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).

Interface Attribute Value
wcsspn () Thread safety MT-Safe

STANDARDS

C11, POSIX.1-2008.

HISTORY

POSIX.1-2001, C99.

SEE ALSO

strspn(3), wcscspn(3)

2023-07-20 Linux man-pages 6.05.01