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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | SEE ALSO | COLOPHON |
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wcpncpy(3) Library Functions Manual wcpncpy(3)
wcpncpy - copy a fixed-size string of wide characters, returning a
pointer to its end
Standard C library (libc, -lc)
#include <wchar.h>
wchar_t *wcpncpy(size_t n;
wchar_t dest[restrict n],
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
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 wcslen(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.
wcpncpy() returns a pointer to one past the last non-null wide
character written, that is, dest + wcsnlen(src, n).
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ wcpncpy() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2008.
stpncpy(3), wcsncpy(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
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Linux man-pages 6.15 2025-07-11 wcpncpy(3)
Pages that refer to this page: stpncpy(3), signal-safety(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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