1 /*
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright © 2023 Keith Packard
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
17 *
18 * 3. Neither the name of the copyright holder nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
33 * OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #define _DEFAULT_SOURCE
37 #include <_ansi.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40
41 #define INCR 16
42
43 _ssize_t
getdelim(char ** restrict lineptr,size_t * restrict nptr,int delim,FILE * restrict stream)44 getdelim (char **restrict lineptr, size_t *restrict nptr,
45 int delim, FILE *restrict stream)
46 {
47 char *line = *lineptr;
48 size_t n = *nptr;
49 _ssize_t count = 0;
50
51 for (;;) {
52 int c = getc(stream);
53 if (c == EOF)
54 break;
55
56 if (count >= (_ssize_t) n) {
57 size_t newsize = n + INCR;
58 char *newline = realloc(line, newsize);
59 if (newline == NULL) {
60 count = -1;
61 break;
62 }
63 line = newline;
64 n = newsize;
65 }
66
67 line[count++] = c;
68 if (c == delim) {
69 line[count] = '\0';
70 break;
71 }
72 }
73
74 *lineptr = line;
75 *nptr = n;
76 return count;
77 }
78
