1*721b9eeeSSascha Wildner /*
2*721b9eeeSSascha Wildner * Public domain stdio wrapper for libz, written by Johan Danielsson.
3*721b9eeeSSascha Wildner *
4*721b9eeeSSascha Wildner * $FreeBSD: src/lib/libz/zopen.c,v 1.2.2.2 2003/02/01 13:33:12 sobomax Exp $
5*721b9eeeSSascha Wildner */
6*721b9eeeSSascha Wildner
7*721b9eeeSSascha Wildner #include <stdio.h>
8*721b9eeeSSascha Wildner #include <zlib.h>
9*721b9eeeSSascha Wildner
10*721b9eeeSSascha Wildner FILE *zopen(const char *fname, const char *mode);
11*721b9eeeSSascha Wildner
12*721b9eeeSSascha Wildner /* convert arguments */
13*721b9eeeSSascha Wildner static int
xgzread(void * cookie,char * data,int size)14*721b9eeeSSascha Wildner xgzread(void *cookie, char *data, int size)
15*721b9eeeSSascha Wildner {
16*721b9eeeSSascha Wildner return gzread(cookie, data, size);
17*721b9eeeSSascha Wildner }
18*721b9eeeSSascha Wildner
19*721b9eeeSSascha Wildner static int
xgzwrite(void * cookie,const char * data,int size)20*721b9eeeSSascha Wildner xgzwrite(void *cookie, const char *data, int size)
21*721b9eeeSSascha Wildner {
22*721b9eeeSSascha Wildner return gzwrite(cookie, __DECONST(void *, data), size);
23*721b9eeeSSascha Wildner }
24*721b9eeeSSascha Wildner
25*721b9eeeSSascha Wildner static int
xgzclose(void * cookie)26*721b9eeeSSascha Wildner xgzclose(void *cookie)
27*721b9eeeSSascha Wildner {
28*721b9eeeSSascha Wildner return gzclose((gzFile) cookie);
29*721b9eeeSSascha Wildner }
30*721b9eeeSSascha Wildner
31*721b9eeeSSascha Wildner FILE *
zopen(const char * fname,const char * mode)32*721b9eeeSSascha Wildner zopen(const char *fname, const char *mode)
33*721b9eeeSSascha Wildner {
34*721b9eeeSSascha Wildner gzFile gz = gzopen(fname, mode);
35*721b9eeeSSascha Wildner if(gz == NULL)
36*721b9eeeSSascha Wildner return NULL;
37*721b9eeeSSascha Wildner
38*721b9eeeSSascha Wildner if(*mode == 'r')
39*721b9eeeSSascha Wildner return (funopen(gz, xgzread, NULL, NULL, xgzclose));
40*721b9eeeSSascha Wildner else
41*721b9eeeSSascha Wildner return (funopen(gz, NULL, xgzwrite, NULL, xgzclose));
42*721b9eeeSSascha Wildner }
43