1 /*
2 * Public domain stdio wrapper for libz, written by Johan Danielsson.
3 */
4
5 #include <sys/cdefs.h>
6 __FBSDID("$FreeBSD: head/lib/libz/zopen.c 84228 2001-09-30 22:39:00Z dillon $");
7
8 #include <stdio.h>
9 #include <zlib.h>
10
11 FILE *zopen(const char *fname, const char *mode);
12
13 /* convert arguments */
14 static int
xgzread(void * cookie,char * data,int size)15 xgzread(void *cookie, char *data, int size)
16 {
17 return gzread(cookie, data, size);
18 }
19
20 static int
xgzwrite(void * cookie,const char * data,int size)21 xgzwrite(void *cookie, const char *data, int size)
22 {
23 return gzwrite(cookie, (void*)data, size);
24 }
25
26 static int
xgzclose(void * cookie)27 xgzclose(void *cookie)
28 {
29 return gzclose(cookie);
30 }
31
32 FILE *
zopen(const char * fname,const char * mode)33 zopen(const char *fname, const char *mode)
34 {
35 gzFile gz = gzopen(fname, mode);
36 if(gz == NULL)
37 return NULL;
38
39 if(*mode == 'r')
40 return (funopen(gz, xgzread, NULL, NULL, xgzclose));
41 else
42 return (funopen(gz, NULL, xgzwrite, NULL, xgzclose));
43 }
44