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-.\"     $OpenBSD: wcslcpy.3,v 1.8 2024/08/07 04:59:45 guenther Exp $
-.\"
-.\" Copyright (c) 1998, 2000 Todd C. Miller <millert@openbsd.org>
-.\"
-.\" Permission to use, copy, modify, and distribute this software for any
-.\" purpose with or without fee is hereby granted, provided that the above
-.\" copyright notice and this permission notice appear in all copies.
-.\"
-.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-.\"
-.Dd $Mdocdate: August 7 2024 $
-.Dt WCSLCPY 3
-.Os
-.Sh NAME
-.Nm wcslcpy ,
-.Nm wcslcat
-.Nd size-bounded wide string copying and concatenation
-.Sh SYNOPSIS
-.In wchar.h
-.Ft size_t
-.Fn wcslcpy "wchar_t * restrict dst" "const wchar_t * restrict src" "size_t size"
-.Ft size_t
-.Fn wcslcat "wchar_t * restrict dst" "const wchar_t * restrict src" "size_t size"
-.Sh DESCRIPTION
-The
-.Fn wcslcpy
-and
-.Fn wcslcat
-functions copy and concatenate wide strings respectively.
-They are designed to be safer, more consistent, and less error prone
-replacements for
-.Xr wcsncpy 3
-and
-.Xr wcsncat 3 .
-Unlike those functions,
-.Fn wcslcpy
-and
-.Fn wcslcat
-take the full size of the buffer (not just the length) and guarantee to
-terminate the result with a null wide character (as long as
-.Fa size
-is larger than 0 or, in the case of
-.Fn wcslcat ,
-as long as there is at least one wide character free in
-.Fa dst ) .
-Note that a wide character for the null wide character should be included in
-.Fa size .
-Also note that
-.Fn wcslcpy
-and
-.Fn wcslcat
-only operate on wide strings that are terminated with a null wide character
-(L'\e0').
-This means that for
-.Fn wcslcpy
-.Fa src
-must be terminated with a null wide character and for
-.Fn wcslcat
-both
-.Fa src
-and
-.Fa dst
-must be terminated with a null wide character.
-.Pp
-The
-.Fn wcslcpy
-function copies up to
-.Fa size
-\(mi 1 wide characters from the wide string
-.Fa src
-to
-.Fa dst ,
-terminating the result with a null wide character.
-.Pp
-The
-.Fn wcslcat
-function appends the wide string
-.Fa src
-to the end of
-.Fa dst .
-It will append at most
-.Fa size
-\(mi wcslen(dst) \(mi 1 wide characters, terminating the result with a null
-wide character.
-.Pp
-If the
-.Fa src
-and
-.Fa dst
-strings overlap, the behavior is undefined.
-.Sh RETURN VALUES
-The
-.Fn wcslcpy
-and
-.Fn wcslcat
-functions return the total length of the wide string they tried to create.
-For
-.Fn wcslcpy
-that means the length of
-.Fa src .
-For
-.Fn wcslcat
-that means the initial length of
-.Fa dst
-plus
-the length of
-.Fa src .
-While this may seem somewhat confusing, it was done to make
-truncation detection simple.
-.Pp
-Note, however, that if
-.Fn wcslcat
-traverses
-.Fa size
-wide characters without finding a null wide character, the length of the
-string is considered to be
-.Fa size
-and the destination wide string will not be terminated with a null wide
-character (since there was no space for it).
-This keeps
-.Fn wcslcat
-from running off the end of a wide string.
-In practice this should not happen (as it means that either
-.Fa size
-is incorrect or that
-.Fa dst
-is not terminated with a null wide character).
-The check exists to prevent potential security problems in incorrect code.
-.Sh SEE ALSO
-.Xr strlcpy 3 ,
-.Xr swprintf 3 ,
-.Xr wcsncat 3 ,
-.Xr wcsncpy 3
-.Sh STANDARDS
-The
-.Fn wcslcpy
-and
-.Fn wcslcat
-functions conform to
-.St -p1003.1-2024 .
-.Sh HISTORY
-The
-.Fn wcslcpy
-and
-.Fn wcslcat
-functions first appeared in
-.Ox 3.8 .
-.Sh AUTHORS
-The
-.Fn wcslcpy
-and
-.Fn wcslcat
-functions are based on code by
-.An Todd C. Miller Aq Mt millert@openbsd.org .