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Initial untested work

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Lubos Dolezel 2013-06-10 21:08:53 +02:00
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CMakeLists.txt
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project(darling-hfsplus)
add_executable(darling-hfsplus main.cpp)
cmake_minimum_required(VERSION 2.8)
add_definitions(-D_FILE_OFFSET_BITS=64)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -ggdb")
add_executable(darling-hfsplus
src/main.cpp
src/unichar.cpp
src/FileReader.cpp
src/HFSVolume.cpp
src/AppleDisk.cpp
src/SubReader.cpp
src/HFSBTree.cpp
src/HFSFork.cpp
src/HFSCatalogBTree.cpp
src/HFSExtentsOverflowBTree.cpp
)
target_link_libraries(darling-hfsplus -licuuc)
install(TARGETS darling-hfsplus RUNTIME DESTINATION bin)

674
LICENSE Normal file
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notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

6
main.cpp
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#include <iostream>
int main(int argc, char **argv) {
std::cout << "Hello, world!" << std::endl;
return 0;
}

40
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#include "AppleDisk.h"
#include <stdexcept>
#include "be.h"
#include <iostream>
#include "SubReader.h"
AppleDisk::AppleDisk(Reader* reader)
: m_reader(reader)
{
reader->read(&m_block0, sizeof(m_block0), 0);
if (be(m_block0.sbSig) != BLOCK0_SIGNATURE)
throw std::runtime_error("Invalid block0 signature");
for (int i = 0; i < 63; i++)
{
DPME dpme;
uint64_t offset = (i+1)*be(m_block0.sbBlkSize);
Partition part;
reader->read(&dpme, sizeof(dpme), offset);
if (be(dpme.dpme_signature) != DPME_SIGNATURE)
continue;
//std::cout << "Partition #" << (i+1) << " type: " << dpme.dpme_type << std::endl;
part.name = dpme.dpme_name;
part.type = dpme.dpme_type;
part.offset = be(dpme.dpme_pblock_start) * be(m_block0.sbBlkSize);
part.size = be(dpme.dpme_pblocks) * be(m_block0.sbBlkSize);
m_partitions.push_back(part);
}
}
Reader* AppleDisk::readerForPartition(unsigned int index)
{
const Partition& part = m_partitions.at(index);
return new SubReader(m_reader, part.offset, part.size);
}

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#ifndef APPLEDISK_H
#define APPLEDISK_H
#include "apm.h"
#include "Reader.h"
#include <string>
#include <vector>
class AppleDisk
{
public:
AppleDisk(Reader* reader);
struct Partition
{
std::string name, type;
uint64_t offset, size; // in byte
};
const std::vector<Partition>& partitions() const { return m_partitions; }
Reader* readerForPartition(unsigned int index);
private:
Reader* m_reader;
Block0 m_block0;
std::vector<Partition> m_partitions;
};
#endif

24
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#include "FileReader.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
FileReader::FileReader(const std::string& path)
: m_fd(-1)
{
m_fd = ::open(path.c_str(), O_RDONLY);
}
FileReader::~FileReader()
{
if (m_fd != -1)
::close(m_fd);
}
int32_t FileReader::read(void* buf, int32_t count, uint64_t offset)
{
if (m_fd == -1)
return -1;
return ::pread(m_fd, buf, count, offset);
}

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#ifndef FILEREADER_H
#define FILEREADER_H
#include "Reader.h"
#include <string>
class FileReader : public Reader
{
public:
FileReader(const std::string& path);
~FileReader();
int32_t read(void* buf, int32_t count, uint64_t offset) override;
private:
int m_fd;
};
#endif

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#include "HFSBTree.h"
#include <stdexcept>
#include "be.h"
#include "hfsplus.h"
#include "unichar.h"
#include <iostream>
#include <cstring>
#include "HFSBTreeNode.h"
HFSBTree::HFSBTree(HFSFork* fork)
: m_fork(fork)
{
BTNodeDescriptor desc0;
std::cout << "Tree size: " << fork->size() << std::endl;
m_tree = new char[fork->size()];
fork->read(m_tree, fork->size(), 0);
memcpy(&desc0, m_tree, sizeof(desc0));
if (desc0.kind != NodeKind::kBTHeaderNode)
throw std::runtime_error("Wrong kind of BTree header");
memcpy(&m_header, m_tree + sizeof(desc0), sizeof(m_header));
std::cout << "leaf records: " << be(m_header.leafRecords) << std::endl;
std::cout << "node size: " << be(m_header.nodeSize) << std::endl;
if (m_header.rootNode)
{
walkTree(be(m_header.rootNode));
}
}
HFSBTreeNode HFSBTree::findLeafNode(const Key* indexKey, KeyComparator comp)
{
return traverseTree(be(m_header.rootNode), indexKey, comp);
}
std::vector<HFSBTreeNode> HFSBTree::findLeafNodes(const Key* indexKey, KeyComparator comp)
{
std::vector<HFSBTreeNode> rv;
HFSBTreeNode current = findLeafNode(indexKey, comp);
if (current.isInvalid())
return rv;
while (current.forwardLink() != 0)
{
Key* key;
current = HFSBTreeNode(m_tree, current.forwardLink(), current.nodeSize());
key = current.getKey<Key>(); // TODO: or the key of the first record?
if (!comp(key, indexKey))
break;
rv.push_back(current);
}
return rv;
}
HFSBTreeNode HFSBTree::traverseTree(int nodeIndex, const Key* indexKey, KeyComparator comp)
{
HFSBTreeNode node(m_tree, nodeIndex, be(m_header.nodeSize));
switch (node.kind())
{
case NodeKind::kBTIndexNode:
{
int position = node.recordCount() / 2;
int distance = position;
uint32_t* childIndex;
Key* key;
// binary search for the next node
while (distance > 1)
{
key = node.getRecordKey<Key>(position);
distance /= 2;
if (comp(key, indexKey))
position -= distance;
else
position += distance;
}
// recurse down
childIndex = node.getRecordData<uint32_t>(position);
return traverseTree(be(*childIndex), indexKey, comp);
}
case NodeKind::kBTLeafNode:
{
return node;
}
case NodeKind::kBTHeaderNode:
case NodeKind::kBTMapNode:
break;
}
return HFSBTreeNode();
}
void HFSBTree::walkTree(int nodeIndex)
{
BTNodeDescriptor* desc;
uint32_t offset = be(m_header.nodeSize)*nodeIndex;
uint16_t* firstRecordOffset;
desc = reinterpret_cast<BTNodeDescriptor*>(m_tree + be(m_header.nodeSize)*nodeIndex);
firstRecordOffset = reinterpret_cast<uint16_t*>(m_tree + be(m_header.nodeSize)*(nodeIndex+1) - sizeof(uint16_t));
switch (desc->kind)
{
case NodeKind::kBTLeafNode:
{
HFSPlusCatalogKey* key = reinterpret_cast<HFSPlusCatalogKey*>(((char*) desc) + sizeof(BTNodeDescriptor));
std::cout << "LeafNode " << nodeIndex << " is a leaf node: " << UnicharToString(key->nodeName) << std::endl;
std::cout << "LeafSibling: " << be(desc->fLink) << std::endl;
std::cout << "LeafRecords: " << be(desc->numRecords) << std::endl;
for (long i = 0; i < be(desc->numRecords); i++)
{
uint16_t recordOffset = be(*(firstRecordOffset-i));
HFSPlusCatalogKey* recordKey = reinterpret_cast<HFSPlusCatalogKey*>(((char*) desc) + recordOffset);
HFSPlusCatalogFile* record;
RecordType recType;
std::cout << "LeafRecordKey: " << UnicharToString(recordKey->nodeName) << " - parent: " << be(recordKey->parentID) << std::endl;
record = reinterpret_cast<HFSPlusCatalogFile*>(((char*) recordKey) + be(recordKey->keyLength) + sizeof(recordKey->keyLength));
recType = RecordType(be(uint16_t(record->recordType)));
switch (recType)
{
case RecordType::kHFSPlusFolderRecord:
{
HFSPlusCatalogFolder* file = (HFSPlusCatalogFolder*) record;
std::cout << "\tFolder: ID " << be(file->folderID) << std::endl;
break;
}
case RecordType::kHFSPlusFileRecord:
{
HFSPlusCatalogFile* file = (HFSPlusCatalogFile*) record;
std::cout << "\tFile: ID " << be(file->fileID) << std::endl;
break;
}
case RecordType::kHFSPlusFolderThreadRecord:
{
HFSPlusCatalogThread* thread = (HFSPlusCatalogThread*) record;
std::cout << "\tA folder named " << UnicharToString(thread->nodeName) << " with CNID " << be(recordKey->parentID) << " has parent CNID " << be(thread->parentID) << std::endl;
break;
}
case RecordType::kHFSPlusFileThreadRecord:
{
HFSPlusCatalogThread* thread = (HFSPlusCatalogThread*) record;
std::cout << "\tA file named " << UnicharToString(thread->nodeName) << " with CNID " << be(recordKey->parentID) << " has parent CNID " << be(thread->parentID) << std::endl;
break;
}
default:
{
std::cout << "\tunknown record type: " << be(uint16_t(record->recordType)) << std::endl;
}
}
}
break;
}
case NodeKind::kBTIndexNode:
{
std::cout << "Node " << nodeIndex << " is an index node with " << be(desc->numRecords) << " records\n";
//std::cout << "Sibling: " << be(desc->fLink) << std::endl;
for (long i = 0; i < be(desc->numRecords); i++)
{
uint16_t recordOffset = be(*(firstRecordOffset-i));
HFSPlusCatalogKey* record = reinterpret_cast<HFSPlusCatalogKey*>(((char*) desc) + recordOffset);
uint16_t keyLen = be(record->keyLength); // TODO: kBTVariableIndexKeysMask
uint32_t childNodeIndex;
std::cout << "Record " << i << ", key len:" << keyLen << std::endl;
std::cout << "Index key " << be(record->parentID) << std::endl;
childNodeIndex = be(*(uint32_t*) (((char*)record)+2+keyLen) );
std::cout << "Child node index: " << childNodeIndex << std::endl;
walkTree(childNodeIndex);
}
break;
}
case NodeKind::kBTHeaderNode:
std::cout << "Node " << nodeIndex << " is a header node\n";
break;
case NodeKind::kBTMapNode:
std::cout << "Node " << nodeIndex << " is a map node\n";
break;
}
}
HFSBTree::~HFSBTree()
{
delete [] m_tree;
delete m_fork;
}

42
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#ifndef HFSBTREE_H
#define HFSBTREE_H
#include "HFSVolume.h"
#include "HFSFork.h"
#include "hfsplus.h"
#include <cstddef>
#include <vector>
#include "HFSBTreeNode.h"
class HFSBTree
{
public:
HFSBTree(HFSFork* fork);
virtual ~HFSBTree();
struct Key
{
uint16_t length;
char data[];
} __attribute__((packed));
// Returns true if the desiredKey >= indexKey
typedef bool (*KeyComparator)(const Key* indexKey, const Key* desiredKey);
// Used when searching for an exact key (e.g. a specific file in a folder)
HFSBTreeNode findLeafNode(const Key* indexKey, KeyComparator comp);
// Sued when searching for an inexact key (e.g. when listing a folder)
// Return value includes the leaf node where the comparator returns true for the first time when approaching from the right,
// and all following nodes for which the comparator returns true as well.
std::vector<HFSBTreeNode> findLeafNodes(const Key* indexKey, KeyComparator comp);
protected:
HFSBTreeNode traverseTree(int nodeIndex, const Key* indexKey, KeyComparator comp);
void walkTree(int nodeIndex);
private:
HFSFork* m_fork;
char* m_tree;
BTHeaderRec m_header;
};
#endif

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#ifndef HFSBTREENODE_H
#define HFSBTREENODE_H
#include "hfsplus.h"
#include "be.h"
class HFSBTreeNode
{
public:
HFSBTreeNode()
: m_descriptor(nullptr), m_nodeSize(0)
{
}
HFSBTreeNode(BTNodeDescriptor* descriptor, uint16_t nodeSize)
: m_descriptor(descriptor), m_nodeSize(nodeSize)
{
m_firstRecordOffset = reinterpret_cast<uint16_t*>(descPtr() + m_nodeSize - sizeof(uint16_t));
}
HFSBTreeNode(void* tree, uint32_t nodeIndex, uint16_t nodeSize)
{
BTNodeDescriptor* nodeDescriptor = reinterpret_cast<BTNodeDescriptor*>(((char*)tree) + nodeSize*nodeIndex);
HFSBTreeNode(nodeDescriptor, nodeSize);
}
NodeKind kind() const
{
return m_descriptor->kind;
}
uint16_t recordCount() const
{
return be(m_descriptor->numRecords);
}
BTNodeDescriptor* descriptor() const
{
return m_descriptor;
}
uint16_t nodeSize() const
{
return m_nodeSize;
}
bool isInvalid() const
{
return !m_descriptor;
}
uint32_t forwardLink() const
{
return be(m_descriptor->fLink);
}
template<typename KeyType> KeyType* getKey() const
{
return reinterpret_cast<KeyType*>(descPtr() + sizeof(BTNodeDescriptor));
}
template<typename KeyType> KeyType* getRecordKey(uint16_t recordIndex) const
{
uint16_t recordOffset = be(*(m_firstRecordOffset - recordIndex));
return reinterpret_cast<KeyType*>(descPtr() + recordOffset);
}
template<typename DataType> DataType* getRecordData(uint16_t recordIndex) const
{
uint16_t* keyLength = getRecordKey<uint16_t>(recordIndex);
char* keyPtr = reinterpret_cast<char*>(keyLength);
return reinterpret_cast<DataType*>(keyPtr + be(*keyLength) + sizeof(uint16_t));
}
private:
char* descPtr() const
{
return reinterpret_cast<char*>(m_descriptor);
}
private:
mutable BTNodeDescriptor* m_descriptor;
uint16_t m_nodeSize;
uint16_t* m_firstRecordOffset;
};
#endif

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#include "HFSCatalogBTree.h"
#include "be.h"
#include <unicode/unistr.h>
#include <sstream>
#include "unichar.h"
static const int MAX_SYMLINKS = 50;
HFSCatalogBTree::HFSCatalogBTree(HFSFork* fork)
: HFSBTree(fork)
{
}
bool HFSCatalogBTree::caseInsensitiveComparator(const Key* indexKey, const Key* desiredKey)
{
const HFSPlusCatalogKey* catIndexKey = reinterpret_cast<const HFSPlusCatalogKey*>(&indexKey);
const HFSPlusCatalogKey* catDesiredKey = reinterpret_cast<const HFSPlusCatalogKey*>(&desiredKey);
UnicodeString desiredName, indexName;
if (catDesiredKey->parentID < be(catIndexKey->parentID))
return false;
desiredName = UnicodeString((char*)catDesiredKey->nodeName.string, catDesiredKey->nodeName.length, "UTF-16BE");
indexName = UnicodeString((char*)catIndexKey->nodeName.string, be(catIndexKey->nodeName.length), "UTF-16BE");
if (desiredName.caseCompare(indexName, 0) < 0)
return false;
return true;
}
bool HFSCatalogBTree::idOnlyComparator(const Key* indexKey, const Key* desiredKey)
{
const HFSPlusCatalogKey* catIndexKey = reinterpret_cast<const HFSPlusCatalogKey*>(&indexKey);
const HFSPlusCatalogKey* catDesiredKey = reinterpret_cast<const HFSPlusCatalogKey*>(&desiredKey);
return catDesiredKey->parentID >= be(catIndexKey->parentID);
}
int HFSCatalogBTree::listDirectory(const std::string& path, std::vector<HFSPlusCatalogFileOrFolder*>& contents)
{
HFSPlusCatalogFileOrFolder* dir = nullptr;
int rv;
RecordType recType;
std::vector<HFSBTreeNode> leaves;
HFSPlusCatalogKey key;
contents.clear();
// determine the CNID of the directory
rv = stat(path, &dir);
if (rv != 0)
return rv;
recType = RecordType(be(uint16_t(dir->folder.recordType)));
if (recType != RecordType::kHFSPlusFolderRecord)
return -ENOTDIR;
// find leaves that may contain directory elements
key.parentID = dir->folder.folderID;
leaves = findLeafNodes((Key*) &key, idOnlyComparator);
for (const HFSBTreeNode& leaf : leaves)
findRecordForParentAndName(leaf, key.parentID, contents);
return 0;
}
static std::vector<std::string> split(const std::string &s, char delim)
{
std::vector<std::string> elems;
std::stringstream ss(s);
std::string item;
while (std::getline(ss, item, delim))
elems.push_back(item);
return elems;
}
int HFSCatalogBTree::stat(std::string path, HFSPlusCatalogFileOrFolder** s, bool lstat)
{
return stat(path, s, lstat, 0);
}
int HFSCatalogBTree::stat(std::string path, HFSPlusCatalogFileOrFolder** s, bool lstat, int currentDepth)
{
std::vector<std::string> elems;
HFSCatalogNodeID parent = kHFSRootParentID;
HFSPlusCatalogFileOrFolder* last = nullptr;
*s = nullptr;
if (path.compare(0, 1, "/"))
path = path.substr(1);
elems = split(path, '/');
for (size_t i = 0; i < elems.size(); i++)
{
const std::string& elem = elems[i];
UnicodeString ustr = UnicodeString::fromUTF8(elem);
HFSBTreeNode leafNode;
HFSPlusCatalogKey desiredKey;
if (ustr.length() > 255) // FIXME: there is a UCS-2 vs UTF-16 issue here!
return -ENAMETOOLONG;
desiredKey.nodeName.length = ustr.extract(0, ustr.length(), (char*) desiredKey.nodeName.string, "UTF-16BE");
desiredKey.parentID = parent;
leafNode = findLeafNode((Key*) &desiredKey, caseInsensitiveComparator);
if (leafNode.isInvalid())
return -ENOENT;
last = findRecordForParentAndName(leafNode, parent, elem);
if (!last)
return -ENOENT;
// resolve symlinks, check if directory...
// FUSE takes care of this
/*
{
RecordType recType = RecordType(be(uint16_t(last->folder.recordType)));
const bool isLastElem = i+1 == elems.size();
if (recType == RecordType::kHFSPlusFileRecord)
{
if (last->file.permissions.fileMode & HFSPLUS_S_IFLNK && (!lstat || !isLastElem))
{
if (currentDepth >= MAX_SYMLINKS)
return -ELOOP;
// TODO: deal with symlinks
// recurse with increased depth
}
else if (!isLastElem)
return -ENOTDIR;
}
}
*/
parent = last->folder.folderID;
}
*s = last;
return 0;
}
HFSPlusCatalogFileOrFolder* HFSCatalogBTree::findRecordForParentAndName(const HFSBTreeNode& leafNode, HFSCatalogNodeID cnid, const std::string& name)
{
std::vector<HFSPlusCatalogFileOrFolder*> result;
findRecordForParentAndName(leafNode, cnid, result, name);
if (result.empty())
return nullptr;
else
return result[0];
}
void HFSCatalogBTree::findRecordForParentAndName(const HFSBTreeNode& leafNode, HFSCatalogNodeID cnid, std::vector<HFSPlusCatalogFileOrFolder*>& result, const std::string& name)
{
for (int i = 0; i < leafNode.recordCount(); i++)
{
HFSPlusCatalogKey* recordKey;
HFSPlusCatalogFileOrFolder* ff;
uint16_t recordOffset;
RecordType recType;
recordKey = leafNode.getRecordKey<HFSPlusCatalogKey>(i);
ff = leafNode.getRecordData<HFSPlusCatalogFileOrFolder>(i);
recType = RecordType(be(uint16_t(ff->folder.recordType)));
switch (recType)
{
case RecordType::kHFSPlusFolderRecord:
case RecordType::kHFSPlusFileRecord:
{
if (be(recordKey->parentID) == cnid && (name.empty() || EqualNoCase(recordKey->nodeName, name)))
result.push_back(ff);
break;
}
case RecordType::kHFSPlusFolderThreadRecord:
case RecordType::kHFSPlusFileThreadRecord:
break;
}
}
}

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#ifndef HFSCATALOGBTREE_H
#define HFSCATALOGBTREE_H
#include "HFSBTree.h"
#include <string>
#include <vector>
#include "HFSBTreeNode.h"
class HFSCatalogBTree : protected HFSBTree
{
public:
// using HFSBTree::HFSBTree;
HFSCatalogBTree(HFSFork* fork);
int listDirectory(const std::string& path, std::vector<HFSPlusCatalogFileOrFolder*>& contents);
int stat(std::string path, HFSPlusCatalogFileOrFolder** s, bool lstat = false);
protected:
int stat(std::string path, HFSPlusCatalogFileOrFolder** s, bool lstat, int currentDepth);
static HFSPlusCatalogFileOrFolder* findRecordForParentAndName(const HFSBTreeNode& leafNode, HFSCatalogNodeID cnid, const std::string& name);
std::string readSymlink(HFSPlusCatalogFile* file);
// does not clear the result argument
static void findRecordForParentAndName(const HFSBTreeNode& leafNode, HFSCatalogNodeID cnid, std::vector<HFSPlusCatalogFileOrFolder*>& result, const std::string& name = std::string());
private:
static bool caseInsensitiveComparator(const Key* indexKey, const Key* desiredKey);
static bool idOnlyComparator(const Key* indexKey, const Key* desiredKey);
};
#endif

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#include "HFSExtentsOverflowBTree.h"
#include "be.h"
#include <stdexcept>
HFSExtentsOverflowBTree::HFSExtentsOverflowBTree(HFSFork* fork)
: HFSBTree(fork)
{
}
void HFSExtentsOverflowBTree::findExtentsForFile(HFSCatalogNodeID cnid, bool resourceFork, uint32_t startBlock, std::vector<const HFSPlusExtentDescriptor*>& extraExtents)
{
HFSPlusExtentKey key;
std::vector<HFSBTreeNode> leaves;
bool first = true;
key.forkType = resourceFork ? 0xff : 0;
key.fileID = cnid;
leaves = findLeafNodes((Key*) &key, cnidComparator);
for (const HFSBTreeNode& leaf : leaves)
{
for (int i = 0; i < leaf.recordCount(); i++)
{
HFSPlusExtentKey* recordKey = leaf.getRecordKey<HFSPlusExtentKey>(i);
HFSPlusExtentDescriptor* extents;
if (recordKey->forkType != key.forkType || be(recordKey->fileID) != cnid)
continue;
if (be(recordKey->startBlock) < startBlock) // skip descriptors already contained in the extents file
continue;
if (first)
{
if (be(recordKey->startBlock) != startBlock)
throw std::runtime_error("Unexpected startBlock value");
first = false;
}
extents = leaf.getRecordData<HFSPlusExtentDescriptor>(i);
// up to 8 extent descriptors per record
for (int x = 0; x < 8; x++)
{
if (!extents[x].blockCount)
break;
extraExtents.push_back(extents + i);
}
}
}
}
bool HFSExtentsOverflowBTree::cnidComparator(const Key* indexKey, const Key* desiredKey)
{
const HFSPlusExtentKey* indexExtentKey = reinterpret_cast<const HFSPlusExtentKey*>(indexKey);
const HFSPlusExtentKey* desiredExtentKey = reinterpret_cast<const HFSPlusExtentKey*>(desiredKey);
if (indexExtentKey->forkType != desiredExtentKey->forkType)
return false;
if (be(indexExtentKey->fileID) > desiredExtentKey->fileID)
return false;
return true;
}

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#ifndef HFSEXTENTSOVERFLOWBTREE_H
#define HFSEXTENTSOVERFLOWBTREE_H
#include "HFSBTree.h"
#include "hfsplus.h"
#include <vector>
class HFSExtentsOverflowBTree : protected HFSBTree
{
public:
HFSExtentsOverflowBTree(HFSFork* fork);
void findExtentsForFile(HFSCatalogNodeID cnid, bool resourceFork, uint32_t startBlock, std::vector<const HFSPlusExtentDescriptor*>& extraExtents);
private:
static bool cnidComparator(const Key* indexKey, const Key* desiredKey);
};
#endif

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#include "HFSFork.h"
#include "be.h"
#include <algorithm>
#include <iostream>
#include <stdexcept>
#include "HFSExtentsOverflowBTree.h"
HFSFork::HFSFork(HFSVolume* vol, const HFSPlusForkData& fork, HFSCatalogNodeID cnid, bool resourceFork)
: m_volume(vol), m_fork(fork), m_cnid(cnid), m_resourceFork(resourceFork)
{
for (int i = 0; i < 8; i++)
{
if (m_fork.extents[i].blockCount > 0)
m_extents.push_back(&m_fork.extents[i]);
}
}
uint64_t HFSFork::size() const
{
return be(m_fork.logicalSize);
}
int32_t HFSFork::read(void* buf, int32_t count, uint64_t offset)
{
const auto blockSize = be(m_volume->m_header.blockSize);
const uint32_t firstBlock = offset / blockSize;
uint32_t blocksSoFar;
int firstExtent, extent;
int firstBlockInFirstExtent;
uint32_t read = 0;
if (offset > m_fork.logicalSize)
count = 0;
else if (offset+count > m_fork.logicalSize)
count = m_fork.logicalSize - offset;
if (!count)
return 0;
do
{
firstExtent = -1;
blocksSoFar = 0;
// locate the first extent
for (int i = 0; i < m_extents.size(); i++)
{
if (be(m_extents[i]->blockCount) + blocksSoFar > firstBlock)
{
firstExtent = i;
firstBlockInFirstExtent = firstBlock - blocksSoFar;
break;
}
blocksSoFar += be(m_extents[i]->blockCount);
}
std::cout << "First extent: " << firstExtent << std::endl;
std::cout << "Block: " << firstBlockInFirstExtent << std::endl;
if (firstExtent == -1)
{
const size_t oldCount = m_extents.size();
if (!m_cnid)
throw std::runtime_error("Cannot search extents file, CNID is kHFSNullID");
if (oldCount > 8)
throw std::runtime_error("Loaded extent count > 8, but appropriate extent not found");
if (oldCount < 8)
throw std::runtime_error("Loaded extent count < 8, but appropriate extent not found");
m_volume->m_overflowExtents->findExtentsForFile(m_cnid, m_resourceFork, blocksSoFar, m_extents);
if (m_extents.size() == oldCount)
throw std::runtime_error("Overflow extents not found for given CNID");
}
} while(firstExtent == -1);
// start reading blocks
extent = firstExtent;
while (read < count)
{
int32_t thistime = std::min<int32_t>(be(m_extents[extent]->blockCount) * blockSize, count-read);
int32_t reallyRead;
uint32_t startBlock;
uint64_t volumeOffset;
if (extent >= m_extents.size())
break; // TODO: we need to read the extents file
startBlock = be(m_extents[extent]->startBlock);
if (extent == firstExtent)
startBlock += firstBlockInFirstExtent;
std::cout << "Reading from block: " << startBlock << std::endl;
volumeOffset = startBlock * blockSize;
if (extent == firstExtent)
volumeOffset += offset % blockSize;
reallyRead = m_volume->m_reader->read((char*)buf + read, thistime, volumeOffset);
read += reallyRead;
if (reallyRead != thistime)
break;
extent++;
}
return read;
}

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#ifndef HFSFORK_H
#define HFSFORK_H
#include "hfsplus.h"
#include "HFSVolume.h"
#include <vector>
class HFSVolume;
class HFSFork : public Reader
{
public:
HFSFork(HFSVolume* vol, const HFSPlusForkData& fork, HFSCatalogNodeID cnid = kHFSNullID, bool resourceFork = false);
int32_t read(void* buf, int32_t count, uint64_t offset) override;
uint64_t size() const;
private:
HFSVolume* m_volume;
const HFSPlusForkData& m_fork;
std::vector<const HFSPlusExtentDescriptor*> m_extents;
HFSCatalogNodeID m_cnid;
bool m_resourceFork;
};
#endif

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#include "HFSVolume.h"
#include <stdexcept>
#include "be.h"
#include "HFSFork.h"
#include "HFSCatalogBTree.h"
#include "HFSExtentsOverflowBTree.h"
HFSVolume::HFSVolume(Reader* reader)
: m_reader(reader), m_overflowExtents(nullptr)
{
reader->read(&m_header, sizeof(m_header), 1024);
if (be(m_header.signature) != HFSP_SIGNATURE && be(m_header.signature) != HFSX_SIGNATURE)
throw std::runtime_error("Invalid HFS signature");
HFSFork* fork = new HFSFork(this, m_header.extentsFile);
m_overflowExtents = new HFSExtentsOverflowBTree(fork);
}
HFSVolume::~HFSVolume()
{
delete m_overflowExtents;
}
void HFSVolume::usage(uint64_t& totalBytes, uint64_t& freeBytes) const
{
totalBytes = be(m_header.blockSize) * be(m_header.totalBlocks);
freeBytes = be(m_header.blockSize) * be(m_header.freeBlocks);
}
HFSCatalogBTree* HFSVolume::rootCatalogTree()
{
HFSFork* fork = new HFSFork(this, m_header.catalogFile);
HFSCatalogBTree* btree = new HFSCatalogBTree(fork);
return btree;
}
HFSFork* HFSVolume::openFile(const std::string& path, bool resourceFork)
{
return nullptr;
}

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#ifndef HFSVOLUME_H
#define HFSVOLUME_H
#include "hfsplus.h"
#include "Reader.h"
#include <string>
class HFSCatalogBTree;
class HFSFork;
class HFSExtentsOverflowBTree;
class HFSVolume
{
public:
HFSVolume(Reader* reader);
~HFSVolume();
void usage(uint64_t& totalBytes, uint64_t& freeBytes) const;
HFSCatalogBTree* rootCatalogTree();
HFSFork* openFile(const std::string& path, bool resourceFork = false);
private:
Reader* m_reader;
HFSExtentsOverflowBTree* m_overflowExtents;
HFSPlusVolumeHeader m_header;
friend class HFSBTree;
friend class HFSFork;
};
#endif

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#ifndef READER_H
#define READER_H
#include <stdint.h>
class Reader
{
public:
virtual ~Reader() {}
virtual int32_t read(void* buf, int32_t count, uint64_t offset) = 0;
};
#endif

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#include "SubReader.h"
SubReader::SubReader(Reader* parent, uint64_t offset, uint64_t size)
: m_parent(parent), m_offset(offset), m_size(size)
{
}
int32_t SubReader::read(void* buf, int32_t count, uint64_t offset)
{
if (offset+count > m_size)
count = m_size - offset;
return m_parent->read(buf, count, offset + m_offset);
}

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#ifndef SUBREADER_H
#define SUBREADER_H
#include "Reader.h"
#include <stdint.h>
class SubReader : public Reader
{
public:
SubReader(Reader* parent, uint64_t offset, uint64_t size);
int32_t read(void* buf, int32_t count, uint64_t offset) override;
private:
Reader* m_parent;
uint64_t m_offset, m_size;
};
#endif

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#ifndef APM_H
#define APM_H
#include <stdint.h>
#pragma pack(1)
static const uint16_t BLOCK0_SIGNATURE = 0x4552;
static const uint16_t DPME_SIGNATURE = 0x504D;
struct DDMap
{
uint32_t ddBlock;
uint16_t ddSize;
uint16_t ddType;
};
struct DPME
{
uint16_t dpme_signature;
uint16_t dpme_reserved_1;
uint32_t dpme_map_entries;
uint32_t dpme_pblock_start;
uint32_t dpme_pblocks;
char dpme_name[32];
char dpme_type[32];
uint32_t dpme_lblock_start;
uint32_t dpme_lblocks;
uint32_t dpme_flags;
uint32_t dpme_boot_block;
uint32_t dpme_boot_bytes;
uint32_t dpme_load_addr;
uint32_t dpme_load_addr_2;
uint32_t dpme_goto_addr;
uint32_t dpme_goto_addr_2;
uint32_t dpme_checksum;
uint8_t dpme_process_id[16];
uint32_t dpme_reserved_2[32];
uint32_t dpme_reserved_3[62];
};
struct Block0
{
uint16_t sbSig;
uint16_t sbBlkSize;
uint32_t sbBlkCount;
uint16_t sbDevType;
uint16_t sbDevId;
uint32_t sbDrvrData;
uint16_t sbDrvrCount;
DDMap sbDrvrMap[8];
uint8_t sbReserved[430];
};
#pragma pack()
#endif

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#ifndef BENDIAN_H
#define BENDIAN_H
#include <stdint.h>
#include <endian.h>
template <typename T> T be(T value);
template <> inline uint16_t be(uint16_t value)
{
return be16toh(value);
}
template <> inline uint32_t be(uint32_t value)
{
return be32toh(value);
}
template <> inline uint64_t be(uint64_t value)
{
return be64toh(value);
}
template <> inline int16_t be(int16_t value)
{
return be16toh(value);
}
template <> inline int32_t be(int32_t value)
{
return be32toh(value);
}
template <> inline int64_t be(int64_t value)
{
return be64toh(value);
}
#endif

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#ifndef HFSPLUS_H
#define HFSPLUS_H
#include <stdint.h>
#pragma pack(1)
typedef uint16_t unichar;
typedef uint32_t HFSCatalogNodeID;
#define HFSP_SIGNATURE 0x482b
#define HFSX_SIGNATURE 0x4858
#define HFSPLUS_S_IFMT 0170000 /* type of file mask */
#define HFSPLUS_S_IFIFO 0010000 /* named pipe (fifo) */
#define HFSPLUS_S_IFCHR 0020000 /* character special */
#define HFSPLUS_S_IFDIR 0040000 /* directory */
#define HFSPLUS_S_IFBLK 0060000 /* block special */
#define HFSPLUS_S_IFREG 0100000 /* regular */
#define HFSPLUS_S_IFLNK 0120000 /* symbolic link */
#define HFSPLUS_S_IFSOCK 0140000 /* socket */
#define HFSPLUS_S_IFWHT 0160000 /* whiteout */
struct HFSString
{
uint16_t length;
unichar string[255];
};
struct HFSPlusBSDInfo
{
uint32_t ownerID;
uint32_t groupID;
uint8_t adminFlags;
uint8_t ownerFlags;
uint16_t fileMode;
union
{
uint32_t iNodeNum;
uint32_t linkCount;
uint32_t rawDevice;
} special;
};
struct HFSPlusExtentDescriptor
{
uint32_t startBlock;
uint32_t blockCount;
};
struct HFSPlusForkData
{
uint64_t logicalSize;
uint32_t clumpSize;
uint32_t totalBlocks;
HFSPlusExtentDescriptor extents[8];
};
struct HFSPlusVolumeHeader
{
uint16_t signature;
uint16_t version;
uint32_t attributes;
uint32_t lastMountedVersion;
uint32_t journalInfoBlock;
uint32_t createDate;
uint32_t modifyDate;
uint32_t backupDate;
uint32_t checkedDate;
uint32_t fileCount;
uint32_t folderCount;
uint32_t blockSize;
uint32_t totalBlocks;
uint32_t freeBlocks;
uint32_t nextAllocation;
uint32_t rsrcClumpSize;
uint32_t dataClumpSize;
uint32_t nextCatalogID;
uint32_t writeCount;
uint64_t encodingsBitmap;
uint32_t finderInfo[8];
HFSPlusForkData allocationFile;
HFSPlusForkData extentsFile;
HFSPlusForkData catalogFile;
HFSPlusForkData attributesFile;
HFSPlusForkData startupFile;
};
enum class NodeKind : int8_t
{
kBTLeafNode = -1,
kBTIndexNode = 0,
kBTHeaderNode = 1,
kBTMapNode = 2
};
struct BTNodeDescriptor
{
uint32_t fLink;
uint32_t bLink;
NodeKind kind;
uint8_t height;
uint16_t numRecords;
uint16_t reserved;
};
struct BTHeaderRec
{
uint16_t treeDepth;
uint32_t rootNode;
uint32_t leafRecords;
uint32_t firstLeafNode;
uint32_t lastLeafNode;
uint16_t nodeSize;
uint16_t maxKeyLength;
uint32_t totalNodes;
uint32_t freeNodes;
uint16_t reserved1;
uint32_t clumpSize; // misaligned
uint8_t btreeType;
uint8_t keyCompareType;
uint32_t attributes; // long aligned again
uint32_t reserved3[16];
};
enum
{
kHFSNullID = 0,
kHFSRootParentID = 1,
kHFSRootFolderID = 2,
kHFSExtentsFileID = 3,
kHFSCatalogFileID = 4,
kHFSBadBlockFileID = 5,
kHFSAllocationFileID = 6,
kHFSStartupFileID = 7,
kHFSAttributesFileID = 8,
kHFSRepairCatalogFileID = 14,
kHFSBogusExtentFileID = 15,
kHFSFirstUserCatalogNodeID = 16
};
struct HFSPlusCatalogKey
{
uint16_t keyLength;
HFSCatalogNodeID parentID;
HFSString nodeName;
};
enum class RecordType : uint16_t
{
kHFSPlusFolderRecord = 0x0001,
kHFSPlusFileRecord = 0x0002,
kHFSPlusFolderThreadRecord = 0x0003,
kHFSPlusFileThreadRecord = 0x0004
};
struct Point
{
int16_t v, h;
};
struct Rect
{
int16_t top, left, bottom, right;
};
struct FileInfo
{
uint32_t fileType;
uint32_t fileCreator;
uint16_t finderFlags;
Point location;
uint16_t reservedField;
};
struct ExtendedFileInfo
{
int16_t reserved1[4];
uint16_t extendedFinderFlags;
int16_t reserved2;
int32_t putAwayFolderID;
};
struct FolderInfo
{
Rect windowBounds;
uint16_t finderFlags;
Point location;
uint16_t reservedField;
};
struct ExtendedFolderInfo
{
Point scrollPosition;
int32_t reserved1;
uint16_t extendedFinderFlags;
int16_t reserved2;
int32_t putAwayFolderID;
};
struct HFSPlusCatalogFolder
{
RecordType recordType;
uint16_t flags;
uint32_t valence;
HFSCatalogNodeID folderID;
uint32_t createDate;
uint32_t contentModDate;
uint32_t attributeModDate;
uint32_t accessDate;
uint32_t backupDate;
HFSPlusBSDInfo permissions;
FolderInfo userInfo;
ExtendedFolderInfo finderInfo;
uint32_t textEncoding;
uint32_t reserved;
};
struct HFSPlusCatalogFile
{
RecordType recordType;
uint16_t flags;
uint32_t reserved1;
HFSCatalogNodeID fileID;
uint32_t createDate;
uint32_t contentModDate;
uint32_t attributeModDate;
uint32_t accessDate;
uint32_t backupDate;
HFSPlusBSDInfo permissions;
FileInfo userInfo;
ExtendedFileInfo finderInfo;
uint32_t textEncoding;
uint32_t reserved2;
HFSPlusForkData dataFork;
HFSPlusForkData resourceFork;
};
struct HFSPlusCatalogFileOrFolder
{
union
{
HFSPlusCatalogFile file;
HFSPlusCatalogFolder folder;
};
};
struct HFSPlusCatalogThread
{
RecordType recordType;
int16_t reserved;
HFSCatalogNodeID parentID;
HFSString nodeName;
};
struct HFSPlusExtentKey
{
uint16_t keyLength;
uint8_t forkType;
uint8_t pad;
HFSCatalogNodeID fileID;
uint32_t startBlock;
};
#pragma pack()
#endif

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#include <iostream>
#include "FileReader.h"
#include "AppleDisk.h"
#include "HFSVolume.h"
#include "HFSCatalogBTree.h"
int main(int argc, char** argv)
{
FileReader* reader = new FileReader(argv[1]);
AppleDisk* adisk = new AppleDisk(reader);
Reader* partReader = nullptr;
HFSVolume* volume;
HFSCatalogBTree* rootTree;
auto parts = adisk->partitions();
for (int i = 0; i < parts.size(); i++)
{
if (parts[i].type == "Apple_HFS")
{
partReader = adisk->readerForPartition(i);
break;
}
}
if (!partReader)
{
std::cerr << "HFS partition not found\n";
return 1;
}
volume = new HFSVolume(partReader);
uint64_t total, free;
volume->usage(total, free);
std::cout << "Disk size: " << total << " bytes\n";
std::cout << "Free size: " << free << " bytes\n";
rootTree = volume->rootCatalogTree();
delete rootTree;
delete partReader;
delete adisk;
delete reader;
return 0;
}

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#include "unichar.h"
#include <iconv.h>
#include <unicode/unistr.h>
std::string UnicharToString(uint16_t length, const unichar* string)
{
std::string result;
UnicodeString str((char*) string, length*2, "UTF-16BE");
str.toUTF8String(result);
return result;
}
bool EqualNoCase(const HFSString& str1, const std::string& str2)
{
UnicodeString ustr = UnicodeString::fromUTF8(str2);
UnicodeString ustr2 = UnicodeString((char*)str1.string, be(str1.length), "UTF-16BE");
return ustr.caseCompare(ustr2, 0) == 0;
}

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#ifndef UNICHAR_H
#define UNICHAR_H
#include <string>
#include "hfsplus.h"
#include "be.h"
std::string UnicharToString(uint16_t length, const unichar* string);
bool EqualNoCase(const HFSString& str1, const std::string& str2);
inline std::string UnicharToString(const HFSString& str) { return UnicharToString(be(str.length), str.string); }
#endif