static long check_opus_header(DB_FILE *in, ogg_sync_state *oy, const off_t offset, char **vendor)
{
ogg_stream_state os;
ogg_page og;
const int64_t serial = init_read_stream(in, oy, &os, &og, offset, OPUSNAME);
if (serial <= OGGEDIT_EOF)
return serial;
ogg_packet op;
const long pages = read_packet(in, oy, &os, &og, &op, 1);
ogg_stream_clear(&os);
if (pages <= OGGEDIT_EOF)
return pages;
if (op.bytes > strlen(TAGMAGIC) && !memcmp(op.packet, TAGMAGIC, strlen(TAGMAGIC)))
*vendor = parse_vendor(&op, strlen(TAGMAGIC));
free(op.packet);
if (!*vendor)
return OGGEDIT_CANNOT_PARSE_HEADERS;
#ifdef HAVE_OGG_STREAM_FLUSH_FILL
if (op.bytes < MAXPAYLOAD * (pages-1))
return 4; // prevent in-place write if the packet is weirdly split into too many pages
#else
return 4; // not safe to pad without ogg_stream_flush_fill
#endif
return op.bytes;
}
static ptrdiff_t check_vorbis_headers(DB_FILE *in, ogg_sync_state *oy, const off_t offset, char **vendor, ogg_packet *codebooks)
{
ogg_stream_state os;
ogg_page og;
const int64_t serial = init_read_stream(in, oy, &os, &og, offset, VORBISNAME);
if (serial <= OGGEDIT_EOF)
return serial;
ogg_packet vc;
int pages = read_packet(in, oy, &os, &og, &vc, 1);
if (pages > OGGEDIT_EOF)
pages = read_packet(in, oy, &os, &og, codebooks, pages);
ogg_stream_clear(&os);
if (pages <= OGGEDIT_EOF)
return pages;
if (vc.bytes > strlen(VCMAGIC) && !memcmp(vc.packet, VCMAGIC, strlen(VCMAGIC)) &&
codebooks->bytes > strlen(CODEMAGIC) && !memcmp(codebooks->packet, CODEMAGIC, strlen(CODEMAGIC)))
*vendor = parse_vendor(&vc, strlen(VCMAGIC));
free(vc.packet);
if (!*vendor)
return OGGEDIT_CANNOT_PARSE_HEADERS;
#ifdef HAVE_OGG_STREAM_FLUSH_FILL
if ((vc.bytes + codebooks->bytes) < MAXPAYLOAD * (pages-1))
return 4; // prevent in-place write if the packets are split over too many pages
#else
return 4; // not safe to pad without ogg_stream_flush_fill
#endif
return vc.bytes;
}
static int
parse_db(FILE *f, pcidb_hdl_t *hdl)
{
char buf[1024];
pcidb_vendor_t *v = NULL;
pcidb_device_t *d = NULL;
pcidb_parse_t state = PDB_VENDOR;
for (;;) {
errno = 0;
if (readline(f, buf, sizeof (buf)) != 0) {
if (errno != 0)
return (-1);
else
return (0);
}
newstate:
switch (state) {
case PDB_VENDOR:
v = parse_vendor(buf, hdl);
if (v == NULL)
return (NULL);
state = PDB_DEVICE;
continue;
case PDB_DEVICE:
if (buf[0] != '\t') {
state = PDB_VENDOR;
goto newstate;
}
if (buf[1] == '\t') {
state = PDB_SUBDEV;
goto newstate;
}
assert(v != NULL);
d = parse_device(buf, v);
if (d == NULL)
return (NULL);
continue;
case PDB_SUBDEV:
if (buf[0] != '\t') {
state = PDB_VENDOR;
goto newstate;
}
if (buf[0] == '\t' && buf[1] != '\t') {
state = PDB_DEVICE;
goto newstate;
}
assert(buf[0] == '\t' && buf[1] == '\t');
assert(d != NULL);
(void) parse_subdev(buf, d);
}
}
}
