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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 │
│ │
│ Permission to use, copy, modify, and/or 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. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/stdio/stdio.h"
#include "libc/sysv/errfuns.h"
/**
* Tunes buffering settings for an stdio stream.
*
* @param mode may be _IOFBF, _IOLBF, or _IONBF
* @param buf may optionally be non-NULL to set the stream's underlying
* buffer, which the stream will own, but won't free, otherwise the
* existing buffer is used
* @param size is ignored if buf is NULL
* @return 0 on success or -1 on error
*/
int setvbuf(FILE *f, char *buf, int mode, size_t size) {
if (buf) {
if (!size) size = BUFSIZ;
if (!f->nofree && f->buf != buf) free_s(&f->buf);
f->buf = buf;
f->size = size;
f->nofree = true;
}
f->bufmode = mode;
return 0;
}
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