lib/libstand/gzipfs.c

66 zf_fill(struct z_file *zf)
71     req = Z_BUFSIZE - zf->zf_zstream.avail_in;
78 	    bcopy(zf->zf_buf + req, zf->zf_buf, Z_BUFSIZE - req);
81 	result = read(zf->zf_rawfd, zf->zf_buf + zf->zf_zstream.avail_in, req);
82 	zf->zf_zstream.next_in = zf->zf_buf;
84 	    zf->zf_zstream.avail_in += result;
95 get_byte(struct z_file *zf, off_t *curoffp)
97     if ((zf->zf_zstream.avail_in == 0) && (zf_fill(zf) == -1))
99     zf->zf_zstream.avail_in--;
101     return(*(zf->zf_zstream.next_in)++);
115 check_header(struct z_file *zf)
122     zf->zf_dataoffset = 0;
125 	c = get_byte(zf, &zf->zf_dataoffset);
130     method = get_byte(zf, &zf->zf_dataoffset);
131     flags = get_byte(zf, &zf->zf_dataoffset);
137     for (len = 0; len < 6; len++) (void)get_byte(zf, &zf->zf_dataoffset);
140 	len  =  (uInt)get_byte(zf, &zf->zf_dataoffset);
141 	len += ((uInt)get_byte(zf, &zf->zf_dataoffset))<<8;
143 	while (len-- != 0 && get_byte(zf, &zf->zf_dataoffset) != -1) ;
146 	while ((c = get_byte(zf, &zf->zf_dataoffset)) != 0 && c != -1) ;
149 	while ((c = get_byte(zf, &zf->zf_dataoffset)) != 0 && c != -1) ;
152 	for (len = 0; len < 2; len++) c = get_byte(zf, &zf->zf_dataoffset);
163     struct z_file	*zf;
201     zf = malloc(sizeof(struct z_file));
202     if (zf == NULL)
204     bzero(zf, sizeof(struct z_file));
205     zf->zf_rawfd = rawfd;
208     if (check_header(zf)) {
209 	close(zf->zf_rawfd);
210 	free(zf);
215     if ((error = inflateInit2(&(zf->zf_zstream), -15)) != Z_OK) {
216 	printf("zf_open: inflateInit returned %d : %s\n", error, zf->zf_zstream.msg);
217 	close(zf->zf_rawfd);
218 	free(zf);
223     f->f_fsdata = zf;
230     struct z_file	*zf = (struct z_file *)f->f_fsdata;
232     inflateEnd(&(zf->zf_zstream));
233     close(zf->zf_rawfd);
234     free(zf);
241     struct z_file	*zf = (struct z_file *)f->f_fsdata;
244     zf->zf_zstream.next_out = buf;			/* where and how much */
245     zf->zf_zstream.avail_out = size;
247     while (zf->zf_zstream.avail_out && zf->zf_endseen == 0) {
248 	if ((zf->zf_zstream.avail_in == 0) && (zf_fill(zf) == -1)) {
252 	if (zf->zf_zstream.avail_in == 0) {		/* oops, unexpected EOF */
254 	    if (zf->zf_zstream.avail_out == size)
259 	error = inflate(&zf->zf_zstream, Z_SYNC_FLUSH);	/* decompression pass */
261 	    zf->zf_endseen = 1;
265 	    printf("inflate: %s\n", zf->zf_zstream.msg);
270 	*resid = zf->zf_zstream.avail_out;
277     struct z_file	*zf = (struct z_file *)f->f_fsdata;
279     if (lseek(zf->zf_rawfd, zf->zf_dataoffset, SEEK_SET) == -1)
281     zf->zf_zstream.avail_in = 0;
282     zf->zf_zstream.next_in = NULL;
283     zf->zf_endseen = 0;
284     (void)inflateReset(&zf->zf_zstream);
292     struct z_file	*zf = (struct z_file *)f->f_fsdata;
301 	target = offset + zf->zf_zstream.total_out;
311     if (target < zf->zf_zstream.total_out && zf_rewind(f) != 0)
315     while (target > zf->zf_zstream.total_out) {
317 	    target - zf->zf_zstream.total_out), NULL);
322     return(zf->zf_zstream.total_out);
329     struct z_file	*zf = (struct z_file *)f->f_fsdata;
333     if ((result = fstat(zf->zf_rawfd, sb)) == 0)