wcsncpy(3) Library Functions Manual wcsncpy(3)
NAME
wcsncpy - copy a fixed-size string of wide characters
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#include <wchar.h>
wchar_t *wcsncpy(wchar_t dest[restrict .n],
const wchar_t src[restrict .n],
size_t n);
DESCRIPTION
The wcsncpy() function is the wide-character equivalent of the
strncpy(3) function. It copies at most n wide characters from the wide-
character string pointed to by src, including the terminating null wide
character (L'\0'), to the array pointed to by dest. Exactly n wide
characters are written at dest. If the length wcslen(src) is smaller
than n, the remaining wide characters in the array pointed to by dest
are filled with null wide characters. If the length wcslen(src) is
greater than or equal to n, the string pointed to by dest will not be
terminated by a null wide character.
The strings may not overlap.
The programmer must ensure that there is room for at least n wide char-
acters at dest.
RETURN VALUE
wcsncpy() returns dest.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
┌────────────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├────────────────────────────────────────────┼───────────────┼─────────┤
│ wcsncpy() │ Thread safety │ MT-Safe │
└────────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
C11, POSIX.1-2008.
HISTORY
POSIX.1-2001, C99.
SEE ALSO
strncpy(3)
Linux man-pages 6.9.1 2024-06-15 wcsncpy(3)
Generated by dwww version 1.16 on Tue Dec 16 04:18:21 CET 2025.