1 /* 2 * Public domain stdio wrapper for libz, written by Johan Danielsson. 3 */ 4 5 #include <sys/cdefs.h> 6 __FBSDID("$FreeBSD$"); 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 15 xgzread(void *cookie, char *data, int size) 16 { 17 return gzread(cookie, data, size); 18 } 19 20 static int 21 xgzwrite(void *cookie, const char *data, int size) 22 { 23 return gzwrite(cookie, (void*)data, size); 24 } 25 26 static int 27 xgzclose(void *cookie) 28 { 29 return gzclose(cookie); 30 } 31 32 static fpos_t 33 xgzseek(void *cookie, fpos_t offset, int whence) 34 { 35 return gzseek(cookie, (z_off_t)offset, whence); 36 } 37 38 FILE * 39 zopen(const char *fname, const char *mode) 40 { 41 gzFile gz = gzopen(fname, mode); 42 if(gz == NULL) 43 return NULL; 44 45 if(*mode == 'r') 46 return (funopen(gz, xgzread, NULL, xgzseek, xgzclose)); 47 else 48 return (funopen(gz, NULL, xgzwrite, xgzseek, xgzclose)); 49 } 50