WCSLEN(3) Library Functions Manual WCSLEN(3)

NAME

wcslen wcsnlen — get length of a fixed-sized wide-character string

SYNOPSIS

#include <wchar.h>

size_t wcslen(const wchar_t *ws);
[CX] size_t wcsnlen(const wchar_t *ws, size_t maxlen);

DESCRIPTION

For wcslen (): [CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C standard.

The wcslen () function shall compute the number of wide-character codes in the wide-character string to which ws points, not including the terminating null wide-character code.

[CX] The wcsnlen () function shall compute the smaller of the number of wide characters in the array to which ws points, not including any terminating null wide-character code, and the value of maxlen. The wcsnlen () function shall never examine more than the first maxlen characters of the wide-character array pointed to by ws.

RETURN VALUE

The wcslen () function shall return the length of ws.

[CX] The wcsnlen () function shall return the number of wide characters preceding the first null wide-character code in the array to which ws points, if ws contains a null wide-character code within the first maxlen wide characters; otherwise, it shall return maxlen.

No return values are reserved to indicate an error.