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libc: port FreeBSD string library routines

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Oh my fucking god this was by far the most awful
and boring and tedious day in my entire life.

Also, dear FreeBSD people: please don't sue me.
I tried really hard to comply with all the
copyright stuff, but it is absolutely possible i
made a mistake.  Just DM me and i'll do everything
in my power to fix it, even if that means
releasing entire portions of GayBSD under the BSD
license.  I don't care, i just want stuff to work.

(i'm including this message to use it as possible
evidence in case i get sued to show my good will)
This commit is contained in:
anna 2021-10-10 05:41:16 +02:00
parent 4679b7cee5
commit 0f9e9f91a6
Signed by: fef
GPG key ID: EC22E476DC2D3D84
87 changed files with 6662 additions and 235 deletions
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85
lib/c/string/wcslcat.c Normal file
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@ -0,0 +1,85 @@
/* See the end of this file for copyright and license terms. */
#include <gay/types.h>
#include <wchar.h>
/*
* Appends src to string dst of size siz (unlike wcsncat, siz is the
* full size of dst, not space left). At most siz-1 characters
* will be copied. Always NUL terminates (unless siz == 0).
* Returns wcslen(initial dst) + wcslen(src); if retval >= siz,
* truncation occurred.
*/
usize wcslcat(wchar_t *dst, const wchar_t *src, usize siz)
{
wchar_t *d = dst;
const wchar_t *s = src;
size_t n = siz;
size_t dlen;
/* Find the end of dst and adjust bytes left but don't go past end */
while (n-- != 0 && *d != '\0')
d++;
dlen = d - dst;
n = siz - dlen;
if (n == 0)
return dlen + wcslen(s);
while (*s != '\0') {
if (n != 1) {
*d++ = *s;
n--;
}
s++;
}
*d = '\0';
return dlen + (s - src); /* count does not include NUL */
}
/*
* This file is part of GayBSD.
* Copyright (c) 2021 fef <owo@fef.moe>.
*
* GayBSD is nonviolent software: you may only use, redistribute, and/or
* modify it under the terms of the Cooperative Nonviolent Public License
* (CNPL) as found in the LICENSE file in the source code root directory
* or at <https://git.pixie.town/thufie/npl-builder>; either version 7
* of the license, or (at your option) any later version.
*
* GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
* permitted by applicable law. See the CNPL for details.
*
* ==========================================================================
*
* This file is derived from FreeBSD source code.
*
* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* from OpenBSD: strlcat.c,v 1.3 2000/11/24 11:10:02 itojun Exp
* $FreeBSD$
*/