1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
| | /* zlib-extra.c - Extra or enhanced routines for compressed I/O.
*
* Copyright (c) 2014 David Bremner
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/ .
*
* Author: David Bremner <david@tethera.net>
*/
#include "zlib-extra.h"
#include <talloc.h>
#include <stdio.h>
#include <string.h>
/* mimic POSIX/glibc getline, but on a zlib gzFile stream, and using talloc */
ssize_t
gzgetline (void *ctx, char **lineptr, size_t *n, gzFile stream) {
size_t len=*n;
char *buf = *lineptr;
size_t offset = 0;
if (len == 0 || buf == NULL) {
/* XXX arbitrary choice of initial size */
len = BUFSIZ;
buf = talloc_size (ctx, len);
}
while (1) {
if (!gzgets (stream, buf + offset, len))
return -1;
/* XXX wasted effort re-counting length of whole line */
offset = strlen (buf);
if ( buf[offset-1] == '\n' )
break;
len *= 2;
buf = talloc_realloc (ctx, buf, char, len);
}
*lineptr = buf;
*n = len;
return offset;
}
|