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fuse-7z-7zip.cpp
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fuse-7z-7zip.cpp
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#include "fuse-7z.hpp"
#include "fuse-7z-node.hpp"
#include <iostream>
#include <stdexcept>
#include <cstdio>
#include <sstream>
#include "lib7zip.h"
using namespace std;
class Fuse7zOutStream : public C7ZipOutStream, public NodeBuffer
{
private:
unsigned long long int position;
public:
vector<char> buffer;
Fuse7zOutStream() : position(0) {
}
virtual ~Fuse7zOutStream() {
}
virtual int Write(const void *data, unsigned int size, unsigned int *processedSize) {
logger << "Write " << data << " size=" << size << " processed " << processedSize << Logger::endl;
memcpy(&buffer[position], data, size);
*processedSize = size;
position += size;
return 0;
}
virtual int Seek(long long int offset, unsigned int seekOrigin, unsigned long long int *newPosition) {
logger << "Seek " << offset << " " << seekOrigin << Logger::endl;
position = seekOrigin;
return 0;
}
virtual int SetSize(unsigned long long int size) {
logger << "SetSize " << size << Logger::endl;
buffer.resize(size);
return 0;
}
};
class Fuse7zInStream : public C7ZipInStream
{
private:
FILE * m_pFile;
std::string m_strFileName;
std::wstring m_strFileExt;
int m_nFileSize;
public:
Fuse7zInStream(std::string const & fileName) : m_strFileName(fileName), m_strFileExt(L"7z") {
m_pFile = fopen(fileName.c_str(), "rb");
if (m_pFile) {
fseek(m_pFile, 0, SEEK_END);
m_nFileSize = ftell(m_pFile);
fseek(m_pFile, 0, SEEK_SET);
int pos = m_strFileName.find_last_of(".");
if (pos != m_strFileName.npos) {
m_strFileExt.resize(fileName.length() - pos);
for (int i(0); i < m_strFileExt.length(); i++) {
m_strFileExt[i] = m_strFileName[pos+1+i];
}
}
}
else {
stringstream ss;
ss << "Can't open " << fileName;
throw runtime_error(ss.str());
}
}
virtual ~Fuse7zInStream()
{
fclose(m_pFile);
}
public:
virtual std::wstring GetExt() const
{
return m_strFileExt;
}
virtual int Read(void *data, unsigned int size, unsigned int *processedSize)
{
if (!m_pFile)
return 1;
int count = fread(data, 1, size, m_pFile);
if (count >= 0) {
if (processedSize != NULL)
*processedSize = count;
return 0;
}
return 1;
}
virtual int Seek(long long int offset, unsigned int seekOrigin, unsigned long long int *newPosition)
{
if (!m_pFile)
return 1;
int result = fseek(m_pFile, (long)offset, seekOrigin);
if (!result) {
if (newPosition)
*newPosition = ftell(m_pFile);
return 0;
}
return result;
}
virtual int GetSize(unsigned long long int * size)
{
if (size)
*size = m_nFileSize;
return 0;
}
};
const wchar_t * index_names[] = {
L"kpidPackSize", //(Packed Size)
L"kpidAttrib", //(Attributes)
L"kpidCTime", //(Created)
L"kpidATime", //(Accessed)
L"kpidMTime", //(Modified)
L"kpidSolid", //(Solid)
L"kpidEncrypted", //(Encrypted)
L"kpidUser", //(User)
L"kpidGroup", //(Group)
L"kpidComment", //(Comment)
L"kpidPhySize", //(Physical Size)
L"kpidHeadersSize", //(Headers Size)
L"kpidChecksum", //(Checksum)
L"kpidCharacts", //(Characteristics)
L"kpidCreatorApp", //(Creator Application)
L"kpidTotalSize", //(Total Size)
L"kpidFreeSpace", //(Free Space)
L"kpidClusterSize", //(Cluster Size)
L"kpidVolumeName", //(Label)
L"kpidPath", //(FullPath)
L"kpidIsDir", //(IsDir)
};
class Fuse7z_lib7zip : public Fuse7z {
C7ZipLibrary lib;
C7ZipArchive * archive;
Fuse7zInStream stream;
public:
Fuse7z_lib7zip(std::string const & filename, std::string const & cwd) : Fuse7z(filename, cwd), stream(filename) {
logger << "Initialization of fuse-7z with archive " << filename << Logger::endl;
if (!lib.Initialize()) {
stringstream ss;
ss << "7z library initialization failed";
throw runtime_error(ss.str());
}
WStringArray exts;
if (!lib.GetSupportedExts(exts)) {
stringstream ss;
ss << "Could not get list of 7z-supported file extensions";
throw runtime_error(ss.str());
}
logger << "Supported extensions : ";
size_t size = exts.size();
for(size_t i = 0; i < size; i++) {
std::wstring ext = exts[i];
for(size_t j = 0; j < ext.size(); j++) {
logger << (char)(ext[j] &0xFF);
}
logger << " ";
}
logger << Logger::endl;
if (lib.OpenArchive(&stream, &archive)) {
unsigned int numItems = 0;
archive->GetItemCount(&numItems);
logger << "Archive contains " << numItems << " entries" << Logger::endl;
Node * node;
for(unsigned int i = 0;i < numItems;i++) {
C7ZipArchiveItem * pArchiveItem = NULL;
if (archive->GetItemInfo(i, &pArchiveItem)) {
std::wstring wpath(pArchiveItem->GetFullPath());
std::string path;
path.resize(wpath.length());
std::copy(wpath.begin(), wpath.end(), path.begin());
node = root_node->insert(const_cast<char*>(path.c_str()));
node->id = i;
node->is_dir = pArchiveItem->IsDir();
{
unsigned long long size;
pArchiveItem->GetUInt64Property(lib7zip::kpidSize, size);
node->stat.st_size = size;
}
{
unsigned long long secpy, time, bias, gain;
secpy = 31536000;
gain = 10000000ULL;
bias = secpy * gain * 369 + secpy * 2438356ULL + 5184000ULL;
pArchiveItem->GetFileTimeProperty(lib7zip::kpidATime, time);
node->stat.st_atim.tv_sec = (time - bias)/gain;
node->stat.st_atim.tv_nsec = ((time - bias) % gain) * 100;
pArchiveItem->GetFileTimeProperty(lib7zip::kpidCTime, time);
node->stat.st_ctim.tv_sec = (time - bias)/gain;
node->stat.st_ctim.tv_nsec = ((time - bias) % gain) * 100;
pArchiveItem->GetFileTimeProperty(lib7zip::kpidMTime, time);
node->stat.st_mtim.tv_sec = (time - bias)/gain;
node->stat.st_mtim.tv_nsec = ((time - bias) % gain) * 100;
}
}
if ((i+1) % 10000 == 0) {
logger << "Indexed " << (i+1) << "th file : " << node->fullname() << Logger::endl;
}
}
}
else {
stringstream ss;
ss << "open archive " << archive_fn << " failed" << endl;
throw runtime_error(ss.str());
}
}
virtual ~Fuse7z_lib7zip() {
delete archive;
lib.Deinitialize();
}
virtual void open(char const * path, Node * node) {
logger << "Opening file " << path << "(" << node->fullname() << ")" << Logger::endl;
Fuse7zOutStream * stream = new Fuse7zOutStream;
node->buffer = stream;
stream->SetSize(node->stat.st_size);
int id = node->id;
archive->Extract(id, stream);
}
virtual void close(char const * path, Node * node) {
logger << "Closing file " << path << "(" << node->fullname() << ")" << Logger::endl;
Fuse7zOutStream * stream = dynamic_cast<Fuse7zOutStream*>(node->buffer);
delete stream;
node->buffer = NULL;
}
virtual int read(char const * path, Node * node, char * buf, size_t size, off_t offset) {
logger << "Reading file " << path << "(" << node->fullname() << ") for " << size << " at " << offset << ", arch_id=" << node->id << Logger::endl;
Fuse7zOutStream * stream = dynamic_cast<Fuse7zOutStream*>(node->buffer);
memcpy(buf, &stream->buffer[offset], size);
return size;
}
};
extern "C" {
void * fuse7z_initlib(char const * archive, char const * cwd) {
void * lib = new Fuse7z_lib7zip(archive, cwd);
return lib;
}
}