76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* $NetBSD: fgetln.c,v 1.4 2003/07/26 20:24:00 salo Exp $ */
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/*
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* Copyright 1999 Luke Mewburn <lukem@NetBSD.org>.
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* All rights reserved.
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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 BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#if !HAVE_FGETLN
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#include <stdlib.h>
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#define BUFCHUNKS BUFSIZ
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char *
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fgetln(FILE *fp, size_t *len)
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{
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static char *buf;
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static size_t bufsize;
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size_t buflen;
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char curbuf[BUFCHUNKS];
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char *p;
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if (buf == NULL) {
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bufsize = BUFCHUNKS;
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buf = (char *)malloc(bufsize);
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if (buf == NULL)
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err(1, "Unable to allocate buffer for fgetln()");
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}
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*buf = '\0';
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buflen = 0;
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while ((p = fgets(curbuf, sizeof(curbuf), fp)) != NULL) {
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size_t l;
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l = strlen(p);
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if (bufsize < buflen + l) {
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bufsize += BUFCHUNKS;
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if ((buf = (char *)realloc(buf, bufsize)) == NULL)
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err(1, "Unable to allocate %ld bytes of memory",
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(long)bufsize);
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}
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strcpy(buf + buflen, p);
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buflen += l;
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if (p[l - 1] == '\n')
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break;
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}
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if (p == NULL && *buf == '\0')
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return (NULL);
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*len = strlen(buf);
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return (buf);
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}
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#endif
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