1 /*
2 * Copyright (c) 2007-2013 Aleksey Cheusov <vle@gmx.net>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24 #include <stdio.h>
25 #include <stdlib.h>
26
27 ssize_t
28 getline(char** lineptr, size_t* n, FILE* stream);
29
30 ssize_t
getline(char ** lineptr,size_t * n,FILE * stream)31 getline(char** lineptr, size_t* n, FILE* stream)
32 {
33 int c;
34 size_t sz = 0;
35
36 while (c = getc (stream), c != EOF){
37 if (sz+1 >= *n){
38 /* +2 is for `c' and 0-terminator */
39 *n = *n * 3 / 2 + 2;
40 *lineptr = (char *) realloc (*lineptr, *n);
41 if (!*lineptr)
42 return -1;
43 }
44
45 (*lineptr) [sz++] = (char) c;
46 if (c == '\n')
47 break;
48 }
49
50 if (ferror (stream))
51 return (ssize_t) -1;
52
53 if (!sz){
54 if (feof (stream)){
55 return (ssize_t) -1;
56 }else if (!*n){
57 *lineptr = (char *) malloc (1);
58 if (!*lineptr)
59 return -1;
60
61 *n = 1;
62 }
63 }
64
65 (*lineptr) [sz] = 0;
66 return sz;
67 }
68