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- /* $NetBSD: getline.c,v 1.2 2014/09/16 17:23:50 christos Exp $ */
- /*-
- * Copyright (c) 2011 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Christos Zoulas.
- *
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``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 FOUNDATION OR CONTRIBUTORS
- * 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 "file.h"
- #if !HAVE_GETLINE
- #include <stdlib.h>
- #include <stdio.h>
- #include <unistd.h>
- #include <errno.h>
- #include <string.h>
- public ssize_t
- getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp)
- {
- char *ptr, *eptr;
- if (*buf == NULL || *bufsiz == 0) {
- *bufsiz = BUFSIZ;
- if ((*buf = malloc(*bufsiz)) == NULL)
- return -1;
- }
- for (ptr = *buf, eptr = *buf + *bufsiz;;) {
- int c = fgetc(fp);
- if (c == -1) {
- if (feof(fp)) {
- ssize_t diff = (ssize_t)(ptr - *buf);
- if (diff != 0) {
- *ptr = '\0';
- return diff;
- }
- }
- return -1;
- }
- *ptr++ = c;
- if (c == delimiter) {
- *ptr = '\0';
- return ptr - *buf;
- }
- if (ptr + 2 >= eptr) {
- char *nbuf;
- size_t nbufsiz = *bufsiz * 2;
- ssize_t d = ptr - *buf;
- if ((nbuf = realloc(*buf, nbufsiz)) == NULL)
- return -1;
- *buf = nbuf;
- *bufsiz = nbufsiz;
- eptr = nbuf + nbufsiz;
- ptr = nbuf + d;
- }
- }
- }
- public ssize_t
- getline(char **buf, size_t *bufsiz, FILE *fp)
- {
- return getdelim(buf, bufsiz, '\n', fp);
- }
- #endif
- #ifdef TEST
- int
- main(int argc, char *argv[])
- {
- char *p = NULL;
- ssize_t len;
- size_t n = 0;
- while ((len = getline(&p, &n, stdin)) != -1)
- (void)printf("%" SIZE_T_FORMAT "d %s", len, p);
- free(p);
- return 0;
- }
- #endif
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