1 /*
2 * Check: a unit test framework for C
3 * Copyright (C) 2001, 2002 Arien Malec
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
18 * MA 02110-1301, USA.
19 */
20
21 #include "libcompat.h"
22 #include <stdio.h>
23
24 #define INITIAL_SIZE 16
25 #define DELIMITER '\n'
26
27 ssize_t
getline(char ** lineptr,size_t * n,FILE * stream)28 getline (char **lineptr, size_t * n, FILE * stream)
29 {
30 ssize_t written = 0;
31 int character;
32
33 if (*lineptr == NULL || *n < INITIAL_SIZE) {
34 free (*lineptr);
35 *lineptr = (char *) malloc (INITIAL_SIZE);
36 *n = INITIAL_SIZE;
37 }
38
39 while ((character = fgetc (stream)) != EOF) {
40 written += 1;
41 if (written >= *n) {
42 *n = *n * 2;
43 *lineptr = realloc (*lineptr, *n);
44 }
45
46 (*lineptr)[written - 1] = character;
47
48 if (character == DELIMITER) {
49 break;
50 }
51 }
52
53 (*lineptr)[written] = '\0';
54
55 return written;
56 }
57