85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
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/*
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* Copyright © 2005 Hector Garcia Alvarez
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* Copyright © 2005, 2008-2012 Guillem Jover <guillem@hadrons.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <string.h>
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#include "local-link.h"
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#define HAVE_GETLINE 1
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#ifdef HAVE_GETLINE
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struct filebuf {
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FILE *fp;
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char *buf;
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size_t len;
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};
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#define FILEBUF_POOL_ITEMS 32
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static struct filebuf fb_pool[FILEBUF_POOL_ITEMS];
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static int fb_pool_cur;
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char *
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fgetln(FILE *stream, size_t *len)
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{
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struct filebuf *fb;
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ssize_t nread;
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flockfile(stream);
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/* Try to diminish the possibility of several fgetln() calls being
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* used on different streams, by using a pool of buffers per file. */
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fb = &fb_pool[fb_pool_cur];
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if (fb->fp != stream && fb->fp != NULL) {
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fb_pool_cur++;
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fb_pool_cur %= FILEBUF_POOL_ITEMS;
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fb = &fb_pool[fb_pool_cur];
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}
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fb->fp = stream;
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nread = getline(&fb->buf, &fb->len, stream);
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funlockfile(stream);
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/* Note: the getdelim/getline API ensures nread != 0. */
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if (nread == -1) {
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*len = 0;
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return NULL;
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} else {
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*len = (size_t)nread;
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return fb->buf;
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}
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}
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libbsd_link_warning(fgetln,
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"This function cannot be safely ported, use getline(3) "
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"instead, as it is supported by GNU and POSIX.1-2008.")
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#else
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#error "Function fgetln() needs to be ported."
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#endif
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