wcpncpy(3) — Linux manual page

wcpncpy(3)              Library Functions Manual              wcpncpy(3)

NAME

       wcpncpy - copy a fixed-size string of wide characters, returning
       a pointer to its end

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <wchar.h>

       wchar_t *wcpncpy(wchar_t dest[restrict .n],
                        const wchar_t src[restrict .n],
                        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
       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.

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 │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       POSIX.1-2008.

SEE ALSO

       stpncpy(3), wcsncpy(3)

COLOPHON

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Linux man-pages 6.9.1          2024-06-15                     wcpncpy(3)

Pages that refer to this page: stpncpy(3), signal-safety(7)

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