lib/libz/zopen.c

   1 /*
   2  * Public domain stdio wrapper for libz, written by Johan Danielsson.
   3  *
   4  * $FreeBSD: src/lib/libz/zopen.c,v 1.2.2.2 2003/02/01 13:33:12 sobomax Exp $
   5  * $DragonFly: src/lib/libz/zopen.c,v 1.2 2003/06/17 04:26:52 dillon Exp $
   6  */
   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 FILE *
  27 zopen(const char *fname, const char *mode)
  28 {
  29     gzFile gz = gzopen(fname, mode);
  30     if(gz == NULL)
  31         return NULL;
  32
  33     if(*mode == 'r')
  34         return (funopen(gz, xgzread, NULL, NULL, gzclose));
  35     else
  36         return (funopen(gz, NULL, xgzwrite, NULL, gzclose));
  37 }