/* read extra Directory info */
static inline void* record_readDXInfo(void *p, DXInfo* xinfo)
{
xinfo->frScroll.v = bswabU16_inc(p);
xinfo->frScroll.h = bswabU16_inc(p);
xinfo->frOpenChain = bswabU32_inc(p);
xinfo->frUnused = bswabU16_inc(p);
xinfo->frComment = bswabU16_inc(p);
xinfo->frPutAway = bswabU32_inc(p);
return p;
}
/* read file info */
static inline void* record_readFInfo(void *p, FInfo* info)
{
info->fdType = bswabU32_inc(p);
info->fdCreator = bswabU32_inc(p);
info->fdFlags = bswabU16_inc(p);
info->fdLocation.v = bswabU16_inc(p);
info->fdLocation.h = bswabU16_inc(p);
info->fdFldr = bswabU16_inc(p);
return p;
}
/* read extra File info */
static inline void* record_readFXInfo(void *p, FXInfo* xinfo)
{
SInt16 *q;
xinfo->fdIconID = bswabU16_inc(p);
q=(SInt16*) p;
q+=4; // skip unused
p=(void *)q;
xinfo->fdComment = bswabU16_inc(p);
xinfo->fdPutAway = bswabU32_inc(p);
return p;
}
/* read a hfsp_cat_thread from memory */
static void* record_readthread(void *p, hfsp_cat_thread* entry)
{
int i;
UInt16 len;
UInt16* cp;
entry-> reserved = bswabU16_inc(p);
entry-> parentID = bswabU32_inc(p);
entry->nodeName.strlen = len= bswabU16_inc(p);
cp = entry->nodeName.name;
if (len > 255)
HFSP_ERROR(-1, "Invalid key length in record thread");
for (i=0; i < len; i++, cp++)
*cp = bswabU16_inc(p);
return p;
fail:
return NULL;
}
/* read directory info */
static inline void* record_readDInfo(void *p, DInfo* info)
{
info->frRect.top = bswabU16_inc(p);
info->frRect.left = bswabU16_inc(p);
info->frRect.bottom = bswabU16_inc(p);
info->frRect.right = bswabU16_inc(p);
info->frFlags = bswabU16_inc(p);
info->frLocation.v = bswabU16_inc(p);
info->frLocation.h = bswabU16_inc(p);
info->frView = bswabU16_inc(p);
return p;
}
/* Find out wether the volume is wrapped and unwrap it eventually */
static int
volume_read_wrapper(volume * vol, hfsp_vh* vh)
{
UInt16 signature;
char buf[vol->blksize];
char *p = buf;
if( volume_readinbuf(vol, buf, 2) ) // Wrapper or volume header starts here
return -1;
signature = bswabU16_inc(p);
if( signature == HFS_VOLHEAD_SIG) { /* Wrapper */
UInt32 drAlBlkSiz; /* size (in bytes) of allocation blocks */
UInt32 sect_per_block; /* how may block build an hfs sector */
UInt16 drAlBlSt; /* first allocation block in volume */
UInt16 embeds, embedl; /* Start/lenght of embedded area in blocks */
p += 0x12; /* skip unneded HFS vol fields */
drAlBlkSiz = bswabU32_inc(p); /* offset 0x14 */
p += 0x4; /* skip unneded HFS vol fields */
drAlBlSt = bswabU16_inc(p); /* offset 0x1C */
p += 0x5E; /* skip unneded HFS vol fields */
signature = bswabU16_inc(p); /* offset 0x7C, drEmbedSigWord */
if( signature != HFSP_VOLHEAD_SIG)
HFSP_ERROR(-1, "This looks like a normal HFS volume");
embeds = bswabU16_inc(p);
embedl = bswabU16_inc(p);
sect_per_block = (drAlBlkSiz / HFSP_BLOCKSZ);
// end is absolute (not relative to HFS+ start)
vol->maxblocks = embedl * sect_per_block;
vol->startblock = drAlBlSt + embeds * sect_per_block;
/* Now we can try to read the embedded HFS+ volume header */
return volume_read(vol,vh,2);
}
else if( signature == HFSP_VOLHEAD_SIG) { /* Native HFS+ volume */
p = buf; // Restore to begin of block
return volume_readbuf(vh, p);
} else
HFSP_ERROR(-1, "Neither Wrapper nor native HFS+ volume header found");
fail:
return -1;
}
/* read a hfsp_cat_key from memory */
void* record_readkey(void* p, void* buf)
{
hfsp_cat_key* key = (hfsp_cat_key*) buf;
const void* check;
UInt16 key_length, len,i;
UInt16* cp;
key->key_length = key_length = bswabU16_inc(p);
check = p;
key->parent_cnid = bswabU32_inc(p);
key->name.strlen = len = bswabU16_inc(p);
cp = key->name.name;
for (i=0; i < len; i++, cp++)
*cp = bswabU16_inc(p);
/* check if keylenght was correct */
if (key_length != ((char*) p) - ((char*) check))
HFSP_ERROR(EINVAL, "Invalid key length in record_readkey");
return p;
fail:
return NULL;
}
/* Read the volume from the given buffer and swap the bytes.
*
* ToDo: add more consitency checks.
*/
static int
volume_readbuf(hfsp_vh* vh, char * p)
{
if( (vh->signature = bswabU16_inc(p)) != HFSP_VOLHEAD_SIG)
HFSP_ERROR(-1, "This is not a HFS+ volume");
vh->version = bswabU16_inc(p);
vh->attributes = bswabU32_inc(p);
vh->last_mount_vers = bswabU32_inc(p);
vh->reserved = bswabU32_inc(p);
vh->create_date = bswabU32_inc(p);
vh->modify_date = bswabU32_inc(p);
vh->backup_date = bswabU32_inc(p);
vh->checked_date = bswabU32_inc(p);
vh->file_count = bswabU32_inc(p);
vh->folder_count = bswabU32_inc(p);
vh->blocksize = bswabU32_inc(p);
vh->total_blocks = bswabU32_inc(p);
vh->free_blocks = bswabU32_inc(p);
vh->next_alloc = bswabU32_inc(p);
vh->rsrc_clump_sz = bswabU32_inc(p);
vh->data_clump_sz = bswabU32_inc(p);
vh->next_cnid = bswabU32_inc(p);
vh->write_count = bswabU32_inc(p);
vh->encodings_bmp = bswabU64_inc(p);
memcpy(vh->finder_info, p, 32);
p += 32; // So finderinfo must be swapped later, ***
p = volume_readfork(p, &vh->alloc_file );
p = volume_readfork(p, &vh->ext_file );
p = volume_readfork(p, &vh->cat_file );
p = volume_readfork(p, &vh->attr_file );
p = volume_readfork(p, &vh->start_file );
return 0;
fail:
return -1;
}
/* read a hfsp_extent_key from memory */
void* record_extent_readkey(void* p, void* buf)
{
hfsp_extent_key* key = (hfsp_extent_key*) buf;
UInt16 key_length;
key->key_length = key_length = bswabU16_inc(p);
key->fork_type = bswabU8_inc(p);
key->filler = bswabU8_inc(p);
if (key_length != 10)
HFSP_ERROR(-1, "Invalid key length in record_extent_readkey");
key->file_id = bswabU32_inc(p);
key->start_block = bswabU32_inc(p);
return p;
fail:
return NULL;
}
/* read extra File info */
static inline char* record_readFXInfo(char *p, FXInfo* xinfo)
{
xinfo->fdIconID = bswabU16_inc(&p);
xinfo->fdUnused[0] = bswabU16_inc(&p);
xinfo->fdUnused[1] = bswabU16_inc(&p);
xinfo->fdUnused[2] = bswabU16_inc(&p);
xinfo->fdUnused[3] = bswabU16_inc(&p);
xinfo->fdComment = bswabU16_inc(&p);
xinfo->fdPutAway = bswabU32_inc(&p);
return p;
}
/* read a hfsp_cat_folder from memory */
static void* record_readfolder(void *p, hfsp_cat_folder* folder)
{
folder->flags = bswabU16_inc(p);
folder->valence = bswabU32_inc(p);
folder->id = bswabU32_inc(p);
folder->create_date = bswabU32_inc(p);
folder->content_mod_date = bswabU32_inc(p);
folder->attribute_mod_date = bswabU32_inc(p);
folder->access_date = bswabU32_inc(p);
folder->backup_date = bswabU32_inc(p);
p = record_readperm (p, &folder->permissions);
p = record_readDInfo (p, &folder->user_info);
p = record_readDXInfo (p, &folder->finder_info);
folder->text_encoding = bswabU32_inc(p);
folder->reserved = bswabU32_inc(p);
return p;
}
/* read a hfsp_cat_file from memory */
static void* record_readfile(void *p, hfsp_cat_file* file)
{
file->flags = bswabU16_inc(p);
file->reserved1 = bswabU32_inc(p);
file->id = bswabU32_inc(p);
file->create_date = bswabU32_inc(p);
file->content_mod_date = bswabU32_inc(p);
file->attribute_mod_date = bswabU32_inc(p);
file->access_date = bswabU32_inc(p);
file->backup_date = bswabU32_inc(p);
p = record_readperm (p, &file->permissions);
p = record_readFInfo (p, &file->user_info);
p = record_readFXInfo (p, &file->finder_info);
file->text_encoding = bswabU32_inc(p);
file->reserved2 = bswabU32_inc(p);
p = volume_readfork (p, &file->data_fork);
return volume_readfork (p, &file->res_fork);
}
/* read a hfsp_cat_entry from memory */
static void* record_readentry(void *p, hfsp_cat_entry* entry)
{
UInt16 type = bswabU16_inc(p);
entry->type = type;
switch (type)
{
case HFSP_FOLDER:
return record_readfolder(p, &entry->u.folder);
case HFSP_FILE:
return record_readfile (p, &entry->u.file);
case HFSP_FOLDER_THREAD:
case HFSP_FILE_THREAD:
return record_readthread(p, &entry->u.thread);
default:
HFSP_ERROR(-1, "Unexpected record type in record_readentry");
} ;
fail:
return NULL;
}
