zcatraw.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <zlib.h>
   4
   5
   6 int main(void)
   7 {
   8         char inbuf[1024], outbuf[1024];
   9         struct z_stream_s zs;
  10         int ret;
  11
  12         memset(&zs, 0, sizeof(zs));
  13
  14         zs.next_out = outbuf;
  15         zs.avail_out = sizeof(outbuf);
  16
  17         ret = inflateInit2(&zs, -15);
  18         if (ret != Z_OK) {
  19                 fprintf(stderr,"inflateInit2 error %d\n", ret);
  20                 goto failed;
  21         }
  22
  23         while (1) {
  24                 if (zs.avail_in == 0) {
  25                         zs.avail_in = read(0, inbuf, sizeof(inbuf));
  26                         zs.next_in = inbuf;
  27                         if (zs.avail_in == 0) break;
  28                 }
  29
  30                 ret = inflate(&zs, Z_SYNC_FLUSH);
  31
  32                 if (zs.avail_out < sizeof(outbuf)) {
  33                         write(1, outbuf, sizeof(outbuf) - zs.avail_out);
  34                         zs.avail_out = sizeof(outbuf);
  35                         zs.next_out = outbuf;
  36                 }
  37
  38                 if (ret == Z_STREAM_END) break;
  39                 if (ret != Z_OK) {
  40                         fprintf(stderr,"inflate error %d\n", ret);
  41                         goto failed;
  42                 }
  43         }
  44
  45         return 0;
  46
  47 failed:
  48         return -1;
  49 }