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  */
   6
   7 #include <stdio.h>
   8 #include <zlib.h>
   9
  10 FILE *zopen(const char *fname, const char *mode);
  11
  12 /* convert arguments */
  13 static int
  14 xgzread(void *cookie, char *data, int size)
  15 {
  16     return gzread(cookie, data, size);
  17 }
  18
  19 static int
  20 xgzwrite(void *cookie, const char *data, int size)
  21 {
  22     return gzwrite(cookie, (void*)data, size);
  23 }
  24
  25 static int
  26 xgzclose(void *cookie)
  27 {
  28     return gzclose((gzFile) cookie);
  29 }
  30
  31 FILE *
  32 zopen(const char *fname, const char *mode)
  33 {
  34     gzFile gz = gzopen(fname, mode);
  35     if(gz == NULL)
  36         return NULL;
  37
  38     if(*mode == 'r')
  39         return (funopen(gz, xgzread, NULL, NULL, xgzclose));
  40     else
  41         return (funopen(gz, NULL, xgzwrite, NULL, xgzclose));
  42 }