gz_uncompress
gz_uncompress(in, out);
gz_uncompress(file, stdout);
gz_uncompress(file, stdout);
gz_uncompress(zfp, STDOUT_FILENO);
gz_uncompress(zfp, STDOUT_FILENO);
static void gz_uncompress(gzFile, int);
size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
usize = gz_uncompress(fd, STDOUT_FILENO,
static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);