gzrewind
if (gzrewind(file) == -1) /* rewind, then skip to offset */
ZEXTERN int ZEXPORT gzrewind(gzFile file);
ZEXTERN int ZEXPORT gzrewind(gzFile file);
if (gzrewind(f) != 0)
if (gzrewind(fp) == -1)
if (gzrewind(fp) == -1)