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WCPNCPY(3) Linux Programmer's Manual WCPNCPY(3)
NAME
wcpncpy - copy a fixed-size string of wide characters, returning a pointer to its end
SYNOPSIS
#include <wchar.h>
wchar_t *wcpncpy(wchar_t *restrict dest, const wchar_t *restrict src,
size_t n);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
wcpncpy():
Since glibc 2.10:
_POSIX_C_SOURCE >= 200809L
Before glibc 2.10:
_GNU_SOURCE
DESCRIPTION
The wcpncpy() function is the wide-character equivalent of the stpncpy(3) function. It copies at most n wide characters from the wide-character string pointed
to by src, including the terminating null wide (L'\0'), to the array pointed to by dest. Exactly n wide characters are written at dest. If the length wc‐
slen(src) is smaller than n, the remaining wide characters in the array pointed to by dest are filled with L'\0' characters. If the length wcslen(src) is
greater than or equal to n, the string pointed to by dest will not be L'\0' terminated.
The strings may not overlap.
The programmer must ensure that there is room for at least n wide characters at dest.
RETURN VALUE
wcpncpy() returns a pointer to the last wide character written, that is, dest+n-1.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
│wcpncpy() │ Thread safety │ MT-Safe │
└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘
CONFORMING TO
POSIX.1-2008.
SEE ALSO
stpncpy(3), wcsncpy(3)
GNU 2021-03-22 WCPNCPY(3)