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/*
* Copyright © 2005 Hector Garcia Alvarez
* Copyright © 2005, 2008-2012 Guillem Jover <guillem@hadrons.org>
*
* 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.
*/
#include <stdio.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <string.h>
#include "local-link.h"
#define HAVE_GETLINE 1
#ifdef HAVE_GETLINE
struct filebuf {
FILE *fp;
char *buf;
size_t len;
};
#define FILEBUF_POOL_ITEMS 32
static struct filebuf fb_pool[FILEBUF_POOL_ITEMS];
static int fb_pool_cur;
char *
fgetln(FILE *stream, size_t *len)
{
struct filebuf *fb;
ssize_t nread;
flockfile(stream);
/* Try to diminish the possibility of several fgetln() calls being
* used on different streams, by using a pool of buffers per file. */
fb = &fb_pool[fb_pool_cur];
if (fb->fp != stream && fb->fp != NULL) {
fb_pool_cur++;
fb_pool_cur %= FILEBUF_POOL_ITEMS;
fb = &fb_pool[fb_pool_cur];
}
fb->fp = stream;
nread = getline(&fb->buf, &fb->len, stream);
funlockfile(stream);
/* Note: the getdelim/getline API ensures nread != 0. */
if (nread == -1) {
*len = 0;
return NULL;
} else {
*len = (size_t)nread;
return fb->buf;
}
}
libbsd_link_warning(fgetln,
"This function cannot be safely ported, use getline(3) "
"instead, as it is supported by GNU and POSIX.1-2008.")
#else
#error "Function fgetln() needs to be ported."
#endif
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