int fsw_streq(struct fsw_string *s1, struct fsw_string *s2)
{
struct fsw_string temp_s;
// handle empty strings
if (s1->type == FSW_STRING_TYPE_EMPTY) {
temp_s.type = FSW_STRING_TYPE_ISO88591;
temp_s.size = temp_s.len = 0;
temp_s.data = NULL;
return fsw_streq(&temp_s, s2);
}
if (s2->type == FSW_STRING_TYPE_EMPTY) {
temp_s.type = FSW_STRING_TYPE_ISO88591;
temp_s.size = temp_s.len = 0;
temp_s.data = NULL;
return fsw_streq(s1, &temp_s);
}
// check length (count of chars)
if (s1->len != s2->len)
return 0;
if (s1->len == 0) // both strings are empty
return 1;
if (s1->type == s2->type) {
// same type, do a dumb memory compare
if (s1->size != s2->size)
return 0;
return fsw_memeq(s1->data, s2->data, s1->size);
}
// dispatch to type-specific functions
#define STREQ_DISPATCH(type1, type2) \
if (s1->type == FSW_STRING_TYPE_##type1 && s2->type == FSW_STRING_TYPE_##type2) \
return fsw_streq_##type1##_##type2(s1->data, s2->data, s1->len); \
if (s2->type == FSW_STRING_TYPE_##type1 && s1->type == FSW_STRING_TYPE_##type2) \
return fsw_streq_##type1##_##type2(s2->data, s1->data, s1->len);
STREQ_DISPATCH(ISO88591, UTF8);
STREQ_DISPATCH(ISO88591, UTF16);
STREQ_DISPATCH(ISO88591, UTF16_SWAPPED);
STREQ_DISPATCH(UTF8, UTF16);
STREQ_DISPATCH(UTF8, UTF16_SWAPPED);
STREQ_DISPATCH(UTF16, UTF16_SWAPPED);
// final fallback
return 0;
}
static fsw_status_t fsw_iso9660_volume_mount(struct fsw_iso9660_volume *vol)
{
fsw_status_t status;
void *buffer;
fsw_u32 blockno;
struct iso9660_volume_descriptor *voldesc;
struct iso9660_primary_volume_descriptor *pvoldesc;
fsw_u32 voldesc_type;
int i;
struct fsw_string s;
struct iso9660_dirrec rootdir;
int sua_pos;
char *sig;
int skip;
struct fsw_rock_ridge_susp_entry *entry;
// read through the Volume Descriptor Set
fsw_set_blocksize(vol, ISO9660_BLOCKSIZE, ISO9660_BLOCKSIZE);
blockno = ISO9660_SUPERBLOCK_BLOCKNO;
do {
status = fsw_block_get(vol, blockno, 0, &buffer);
if (status)
return status;
voldesc = (struct iso9660_volume_descriptor *)buffer;
voldesc_type = voldesc->volume_descriptor_type;
if (fsw_memeq(voldesc->standard_identifier, "CD001", 5)) {
// descriptor follows ISO 9660 standard
if (voldesc_type == 1 && voldesc->volume_descriptor_version == 1) {
// suitable Primary Volume Descriptor found
if (vol->primary_voldesc) {
fsw_free(vol->primary_voldesc);
vol->primary_voldesc = NULL;
}
status = fsw_memdup((void **)&vol->primary_voldesc, voldesc, ISO9660_BLOCKSIZE);
}
} else if (!fsw_memeq(voldesc->standard_identifier, "CD", 2)) {
// completely alien standard identifier, stop reading
voldesc_type = 255;
}
fsw_block_release(vol, blockno, buffer);
blockno++;
} while (!status && voldesc_type != 255);
if (status)
return status;
// get information from Primary Volume Descriptor
if (vol->primary_voldesc == NULL)
return FSW_UNSUPPORTED;
pvoldesc = vol->primary_voldesc;
if (ISOINT(pvoldesc->logical_block_size) != 2048)
return FSW_UNSUPPORTED;
// get volume name
for (i = 32; i > 0; i--)
if (pvoldesc->volume_identifier[i-1] != ' ')
break;
s.type = FSW_STRING_TYPE_ISO88591;
s.size = s.len = i;
s.data = pvoldesc->volume_identifier;
status = fsw_strdup_coerce(&vol->g.label, vol->g.host_string_type, &s);
if (status)
return status;
// setup the root dnode
status = fsw_dnode_create_root(vol, ISO9660_SUPERBLOCK_BLOCKNO << ISO9660_BLOCKSIZE_BITS, &vol->g.root);
if (status)
return status;
fsw_memcpy(&vol->g.root->dirrec, &pvoldesc->root_directory, sizeof(struct iso9660_dirrec));
if ( pvoldesc->escape[0] == 0x25
&& pvoldesc->escape[1] == 0x2f
&& ( pvoldesc->escape[2] == 0x40
|| pvoldesc->escape[2] == 0x43
|| pvoldesc->escape[2] == 0x45))
{
FSW_MSG_DEBUG((FSW_MSGSTR("fsw_iso9660_volume_mount: success (joliet!!!)\n")));
vol->fJoliet = 1;
}
fsw_memcpy(&rootdir, &pvoldesc->root_directory, sizeof(rootdir));
sua_pos = (sizeof(struct iso9660_dirrec)) + rootdir.file_identifier_length + (rootdir.file_identifier_length % 2) - 2;
//int sua_size = rootdir.dirrec_length - rootdir.file_identifier_length;
//FSW_MSG_DEBUG((FSW_MSGSTR("fsw_iso9660_volume_mount: success (SUA(pos:%x, sz:%d)!!!)\n"), sua_pos, sua_size));
#if 1
status = fsw_block_get(vol, ISOINT(rootdir.extent_location), 0, &buffer);
sig = (char *)buffer + sua_pos;
skip = 0;
entry = (struct fsw_rock_ridge_susp_entry *)sig;
if ( entry->sig[0] == 'S'
&& entry->sig[1] == 'P')
{
struct fsw_rock_ridge_susp_sp *sp = (struct fsw_rock_ridge_susp_sp *)entry;
if (sp->magic[0] == 0xbe && sp->magic[1] == 0xef)
{
vol->fRockRidge = 1;
} else {
FSW_MSG_DEBUG((FSW_MSGSTR("fsw_iso9660_volume_mount: SP magic isn't valid\n")));
}
skip = sp->skip;
}
#endif
// release volume descriptors
fsw_free(vol->primary_voldesc);
vol->primary_voldesc = NULL;
FSW_MSG_DEBUG((FSW_MSGSTR("fsw_iso9660_volume_mount: success\n")));
return FSW_SUCCESS;
}
