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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/*
* This file is part of the sn package.
* Distribution of sn is covered by the GNU GPL. See file COPYING.
* Copyright 1998-2000 Harold Tay.
* Copyright 2000- Patrik Rdman.
*/
/*
* How to deal with article bodies, which may be compressed.
* On input, compression takes place in store.c without our help.
* Caller must not free the article body on return.
*/
#ifdef USE_ZLIB
#include <stdlib.h>
#include <string.h>
#include <zconf.h>
#include <zlib.h>
#include "art.h"
static const char ver_ctrl_id[] = "$Id: body.c 29 2004-04-24 23:02:38Z patrik $";
int body (char **artbod, int *len)
{
static char *bodbuf = NULL;
z_stream zs;
int e, msize, inc;
if (bodbuf)
{
free(bodbuf);
bodbuf = NULL;
}
if (*len < 0)
return 1;
if (0 == *len || *len < COMPRESS_MAGIC_LEN)
return 0;
for (e = 0; e < COMPRESS_MAGIC_LEN; e++)
if ((*artbod)[e] != COMPRESS_MAGIC[e])
return 0;
inc = (*len / 2) + 1;
zs.next_out = malloc(msize = zs.avail_out = 5 * inc);
if (!(bodbuf = (char *) zs.next_out))
return -1;
zs.next_in = (unsigned char *) *artbod + COMPRESS_MAGIC_LEN;
zs.avail_in = (unsigned) (*len - COMPRESS_MAGIC_LEN);
zs.zalloc = 0;
zs.zfree = 0;
if ((e = inflateInit(&zs)))
return 0;
while (0 == (e = inflate(&zs, Z_NO_FLUSH)))
if (zs.avail_out < 10)
{
char *tmp;
int used;
if (!(tmp = malloc(msize + inc)))
goto bomb;
used = msize - zs.avail_out;
memcpy(tmp, bodbuf, used);
zs.next_out = (unsigned char *) tmp + used;
msize += inc;
zs.avail_out += inc;
free(bodbuf);
bodbuf = tmp;
}
inflateEnd(&zs);
if (Z_STREAM_END == e
#if 0
/* I have this problem; apparently I'm the only one who does */
|| Z_DATA_ERROR == e
#endif
)
{
*len = zs.next_out - (unsigned char *) bodbuf;
*artbod = bodbuf;
bodbuf[*len] = '\0';
return 0;
}
bomb:
free(bodbuf);
bodbuf = NULL;
return -1;
}
#endif /* USE_ZLIB */
|
