nod/lib/DiscBase.cpp

72 lines
2.0 KiB
C++

#include <sys/stat.h>
#include "DiscBase.hpp"
#include "IFileIO.hpp"
namespace NOD
{
DiscBase::DiscBase(std::unique_ptr<IDiscIO>&& dio)
: m_discIO(std::move(dio)), m_header(*m_discIO.get())
{
}
void DiscBase::IPartition::parseFST(IPartReadStream& s)
{
std::unique_ptr<uint8_t[]> fst(new uint8_t[m_fstSz]);
s.seek(m_fstOff);
s.read(fst.get(), m_fstSz);
const FSTNode* nodes = (FSTNode*)fst.get();
/* Root node indicates the count of all contained nodes */
uint32_t nodeCount = nodes[0].getLength();
const char* names = (char*)fst.get() + 12 * nodeCount;
m_nodes.clear();
m_nodes.reserve(nodeCount);
/* Construct nodes */
for (uint32_t n=0 ; n<nodeCount ; ++n)
{
const FSTNode& node = nodes[n];
m_nodes.emplace_back(*this, node, n ? names + node.getNameOffset() : "");
}
/* Setup dir-child iterators */
for (std::vector<Node>::iterator it=m_nodes.begin();
it != m_nodes.end();
++it)
{
Node& node = *it;
if (node.m_kind == Node::NODE_DIRECTORY)
{
node.m_childrenBegin = it + 1;
node.m_childrenEnd = m_nodes.begin() + node.m_discLength;
}
}
}
void DiscBase::IPartition::Node::extractToDirectory(const std::string& basePath, bool force)
{
std::string path = basePath + "/" + getName();
if (m_kind == NODE_DIRECTORY)
{
if (mkdir(path.c_str(), 0755) && errno != EEXIST)
throw std::runtime_error("unable to mkdir '" + path + "'");
for (DiscBase::IPartition::Node& subnode : *this)
subnode.extractToDirectory(path);
}
else if (m_kind == NODE_FILE)
{
struct stat theStat;
if (force || stat(path.c_str(), &theStat))
{
m_hddFile = NewFileIO(path);
std::unique_ptr<IPartReadStream> rs = beginReadStream();
std::unique_ptr<IFileIO::IWriteStream> ws = m_hddFile->beginWriteStream();
ws->copyFromDisc(*rs.get(), m_discLength);
}
}
}
}