xref: /titanic_53/usr/src/man/man3c/wcpncpy.3c

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.\" Copyright 2014 Garrett D'Amore <garrett@damore.org>
.\"
.Dd "Jul 27, 2014"
.Dt WCPCPY 3C
.Os
.Sh NAME
.Nm wcpcpy ,
.Nm wcpncpy
.Nd copy a wide-character string and return a pointer to its end
.Sh SYNOPSIS
.In wchar.h
.
.Ft "wchar_t *"
.Fo wcpcpy
.Fa "wchar_t *restrict ws1"
.Fa "const wchar_t *restrict ws2"
.Fc
.
.Ft "wchar_t *"
.Fo wcpncpy
.Fa "wchar_t *restrict ws1"
.Fa "const wchar_t *restrict ws2"
.Fa "size_t n"
.Fc
.
.Sh DESCRIPTION
The
.Fn wcpcpy
and
.Fn wcpncpy
functions copy the wide-character string pointed to by
.Fa ws2
into the location pointed to by
.Fa ws1 .
They stop copying after a null wide-character is copied, or in the case
of
.Fn wcpncpy ,
after
.Fa n
wide-characters have been copied. If
.Fa ws2
contains fewer than
.Fa n
wide-characters, then the
.Fn wcpncpy
function pads wide-characters to the end of the destination
.Fa ws1
until exactly
.Fa n
wide-characters have been written.
.Lp
In the case of
.Fn wcpncpy
a terminating null wide-character will
.Em not
be written if the length of
.Fa ws2
exceeds
.Fa n .
.Lp
If
.Fa ws1
and
.Fa ws2
overlap, the result is undefined.
.Lp
The
.Fn wcpcpy
and
.Fn wcpncpy
functions are the wide-character equivalents of
.Fn stpcpy
and
.Fn stpncpy ,
respectively.
.Sh RETURN VALUES
The
.Fn wcpcpy
and
.Fn wcpncpy
functions return a pointer to the last wide-character written.  In the
case of
.Fn wcpncpy
this will always be equal to
.Po Fa ws1 Li + Fa n Li \(mi 1 Pc .
.Sh ERRORS
None.
.Sh INTERFACE STABILITY
.Sy Standard .
.Sh MT-LEVEL
.Sy MT-Safe .
.Sh SEE ALSO
.Xr stpcpy 3C ,
.Xr stpncpy 3C ,
.Xr wcscpy 3C ,
.Xr wcsncpy 3C ,
.Xr wchar.h 3HEAD ,
.Xr standards 5
.Sh STANDARDS
The
.Fn wcpcpy
and
.Fn wcpncpy
functions were introduced in
.St -p1003.1-2008 .