cosmopolitan/libc/mem/asprintf.c

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2020-06-15 14:18:57 +00:00
/*-*- 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/mem/mem.h"
/**
* Formats string, allocating needed memory.
*
* @param *strp is output-only and must be free'd, even on error; this
* behavior was adopted to help put your needs first in terms of
* portability, since that's guaranteed to work with all libraries
* @return bytes written (excluding NUL) or -1 w/ errno
* @see xasprintf() for a better API
*/
int(asprintf)(char **strp, const char *fmt, ...) {
int res;
va_list va;
va_start(va, fmt);
res = (vasprintf)(strp, fmt, va);
va_end(va);
return res;
}