106 lines
3 KiB
C
106 lines
3 KiB
C
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/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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// MP support header
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#include "MacportsLegacySupport.h"
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#if __MP_LEGACY_SUPPORT_GETLINE__
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "getdelim.h"
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#include <limits.h>
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#include <stdlib.h>
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#include <errno.h>
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#ifndef SIZE_MAX
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# define SIZE_MAX ((size_t) -1)
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#endif
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#ifndef SSIZE_MAX
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# define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
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#endif
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#if !HAVE_FLOCKFILE
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# undef flockfile
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# define flockfile(x) ((void) 0)
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#endif
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#if !HAVE_FUNLOCKFILE
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# undef funlockfile
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# define funlockfile(x) ((void) 0)
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#endif
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/* Read up to (and including) a DELIMITER from FP into *LINEPTR (and
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NUL-terminate it). *LINEPTR is a pointer returned from malloc (or
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NULL), pointing to *N characters of space. It is realloc'ed as
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necessary. Returns the number of characters read (not including
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the null terminator), or -1 on error or EOF. */
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ssize_t
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getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp)
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{
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char *ptr, *eptr;
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if (*buf == NULL || *bufsiz == 0) {
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*bufsiz = BUFSIZ;
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if ((*buf = malloc(*bufsiz)) == NULL)
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return -1;
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}
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for (ptr = *buf, eptr = *buf + *bufsiz;;) {
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int c = fgetc(fp);
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if (c == -1) {
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if (feof(fp))
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return ptr == *buf ? -1 : ptr - *buf;
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else
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return -1;
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}
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*ptr++ = c;
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if (c == delimiter) {
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*ptr = '\0';
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return ptr - *buf;
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}
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if (ptr + 2 >= eptr) {
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char *nbuf;
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size_t nbufsiz = *bufsiz * 2;
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ssize_t d = ptr - *buf;
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if ((nbuf = realloc(*buf, nbufsiz)) == NULL)
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return -1;
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*buf = nbuf;
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*bufsiz = nbufsiz;
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eptr = nbuf + nbufsiz;
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ptr = nbuf + d;
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}
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}
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}
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#endif
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