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
|
/*
* Public domain stdio wrapper for libz, written by Johan Danielsson.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <zlib.h>
FILE *zopen(const char *fname, const char *mode);
FILE *zdopen(int fd, const char *mode);
/* convert arguments */
static int
xgzread(void *cookie, char *data, int size)
{
return gzread(cookie, data, size);
}
static int
xgzwrite(void *cookie, const char *data, int size)
{
return gzwrite(cookie, (void*)data, size);
}
static int
xgzclose(void *cookie)
{
return gzclose(cookie);
}
static fpos_t
xgzseek(void *cookie, fpos_t offset, int whence)
{
return gzseek(cookie, (z_off_t)offset, whence);
}
FILE *
zopen(const char *fname, const char *mode)
{
gzFile gz = gzopen(fname, mode);
if(gz == NULL)
return NULL;
if(*mode == 'r')
return (funopen(gz, xgzread, NULL, xgzseek, xgzclose));
else
return (funopen(gz, NULL, xgzwrite, xgzseek, xgzclose));
}
FILE *
zdopen(int fd, const char *mode)
{
gzFile gz;
gz = gzdopen(fd, mode);
if (gz == NULL)
return (NULL);
if (*mode == 'r')
return (funopen(gz, xgzread, NULL, xgzseek, xgzclose));
else
return (funopen(gz, NULL, xgzwrite, xgzseek, xgzclose));
}
|
