1 /* $NetBSD: zopen.c,v 1.4 2017/01/10 04:42:20 kamil Exp $ */ 2 3 /* 4 * Public domain stdio wrapper for libz, written by Johan Danielsson. 5 */ 6 7 #include <sys/cdefs.h> 8 #ifndef lint 9 __RCSID("$NetBSD: zopen.c,v 1.4 2017/01/10 04:42:20 kamil Exp $"); 10 #endif 11 12 #include <stdio.h> 13 #include <zlib.h> 14 15 FILE *zopen(const char *fname, const char *mode); 16 17 /* convert arguments */ 18 static int 19 xgzread(void *cookie, char *data, int size) 20 { 21 return gzread(cookie, data, size); 22 } 23 24 static int 25 xgzwrite(void *cookie, const char *data, int size) 26 { 27 return gzwrite(cookie, __UNCONST(data), size); 28 } 29 30 FILE * 31 zopen(const char *fname, const char *mode) 32 { 33 gzFile gz = gzopen(fname, mode); 34 if(gz == NULL) 35 return NULL; 36 37 if(*mode == 'r') 38 return funopen(gz, xgzread, NULL, NULL, (int (*)(void *))gzclose); 39 else 40 return funopen(gz, NULL, xgzwrite, NULL, (int (*)(void *))gzclose); 41 } 42