NAME

wmemset — set wide characters in memory

SYNOPSIS

#include <wchar.h>

wchar_t *wmemset(wchar_t *ws, wchar_t wc, size_t n);


DESCRIPTION

^[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.1-2024 defers to the ISO C standard.

The wmemset() function shall copy the value of wc into each of the first n wide characters of the object pointed to by ws. This function shall not be affected by locale and all wchar_t values shall be treated identically. The null wide character and wchar_t values not corresponding to valid characters shall not be treated specially.

If n is zero, the application shall ensure that ws is a valid pointer, and the function shall copy zero wide characters.

^[CX] The wmemset() function shall not change the setting of errno on valid input.

RETURN VALUE

The wmemset() functions shall return the value of ws.

ERRORS

No errors are defined.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

wmemchr, wmemcmp, wmemcpy, wmemmove

XBD <wchar.h>

CHANGE HISTORY

First released in Issue 5. Included for alignment with ISO/IEC 9899:1990/Amendment 1:1995 (E).

Issue 6

The normative text is updated to avoid use of the term "must" for application requirements.

Issue 8

Austin Group Defect 448 is applied, adding a requirement that wmemset() does not change the setting of errno on valid input.