cosmopolitan/libc/x/xstrndup.c

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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "libc/log/log.h"
#include "libc/mem/mem.h"
#include "libc/x/x.h"
/**
* Allocates new copy of string, with byte limit.
*
* @param s is a NUL-terminated byte string
* @param n if less than strlen(s) will truncate the string
* @return new string or NULL w/ errno
* @error ENOMEM
*/
char *xstrndup(const char *s, size_t n) {
void *res = strndup(s, n);
if (!res) die();
return res;
}