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#include "Archive7Zip.h"
#include <algorithm>
#include <boost/system/error_code.hpp>
#include <stdexcept>
#include <string.h>
extern "C" {
#include "lib/7z/Types.h"
#include "lib/7z/Archive/7z/7zAlloc.h"
#include "lib/7z/Archive/7z/7zExtract.h"
#include "lib/7z/7zCrc.h"
}
#include "Util.h"
#include "mmgr.h"
#include "LogOutput.h"
CArchive7Zip::CArchive7Zip(const std::string& name) :
CArchiveBuffered(name),
curSearchHandle(1),
isOpen(false)
{
blockIndex = 0xFFFFFFFF;
outBuffer = NULL;
outBufferSize = 0;
allocImp.Alloc = SzAlloc;
allocImp.Free = SzFree;
allocTempImp.Alloc = SzAllocTemp;
allocTempImp.Free = SzFreeTemp;
SzArEx_Init(&db);
WRes wres = InFile_Open(&archiveStream.file, name.c_str());
if (wres) {
boost::system::error_code e(wres, boost::system::get_system_category());
LogObject() << "Error opening " << name << ": " << e.message() << " (" << e.value() << ")";
return;
}
FileInStream_CreateVTable(&archiveStream);
LookToRead_CreateVTable(&lookStream, False);
lookStream.realStream = &archiveStream.s;
LookToRead_Init(&lookStream);
CrcGenerateTable();
SRes res = SzArEx_Open(&db, &lookStream.s, &allocImp, &allocTempImp);
if (res == SZ_OK) {
isOpen = true;
}
else {
isOpen = false;
std::string error;
switch (res) {
case SZ_ERROR_FAIL:
error = "Extracting failed";
break;
case SZ_ERROR_CRC:
error = "CRC error (archive corrupted?)";
break;
case SZ_ERROR_INPUT_EOF:
error = "Unexpected end of file (truncated?)";
break;
case SZ_ERROR_MEM:
error = "Out of memory";
break;
case SZ_ERROR_UNSUPPORTED:
error = "Unsupported archive";
break;
case SZ_ERROR_NO_ARCHIVE:
error = "Archive not found";
break;
default:
error = "Unknown error";
break;
}
LogObject() << "Error opening " << name << ": " << error;
return;
}
// Get contents of archive and store name->int mapping
for (unsigned i = 0; i < db.db.NumFiles; ++i) {
CSzFileItem *f = db.db.Files + i;
if ((f->Size >= 0) && !f->IsDir) {
std::string name = f->Name;
FileData fd;
fd.origName = name;
fd.fp = i;
fd.size = f->Size;
fd.crc = (f->Size > 0) ? f->FileCRC : 0;
StringToLowerInPlace(name);
fileData[name] = fd;
}
}
}
CArchive7Zip::~CArchive7Zip(void)
{
if (outBuffer) {
IAlloc_Free(&allocImp, outBuffer);
}
if (isOpen) {
File_Close(&archiveStream.file);
}
SzArEx_Free(&db, &allocImp);
}
unsigned int CArchive7Zip::GetCrc32 (const std::string& fileName)
{
std::string lower = StringToLower(fileName);
FileData fd = fileData[lower];
return fd.crc;
}
FileBuffer* CArchive7Zip::GetEntireFileImpl(const std::string& fName)
{
if (!isOpen)
return NULL;
// Figure out the file index
std::string fileName = StringToLower(fName);
if (fileData.find(fileName) == fileData.end())
return NULL;
FileData fd = fileData[fileName];
// Get 7zip to decompress it
size_t offset;
size_t outSizeProcessed;
SRes res;
res = SzAr_Extract(&db, &lookStream.s, fd.fp, &blockIndex, &outBuffer, &outBufferSize, &offset, &outSizeProcessed, &allocImp, &allocTempImp);
FileBuffer* of = NULL;
if (res == SZ_OK) {
of = new FileBuffer;
of->size = outSizeProcessed;
of->data = (char*)outBuffer + offset;
}
if (res != SZ_OK)
return NULL;
return of;
}
int CArchive7Zip::FindFiles(int cur, std::string* name, int* size)
{
if (cur == 0) {
curSearchHandle++;
cur = curSearchHandle;
searchHandles[cur] = fileData.begin();
}
if (searchHandles.find(cur) == searchHandles.end())
throw std::runtime_error("Unregistered handle. Pass a handle returned by CArchive7Zip::FindFiles.");
if (searchHandles[cur] == fileData.end()) {
searchHandles.erase(cur);
return 0;
}
*name = searchHandles[cur]->second.origName;
*size = searchHandles[cur]->second.size;
searchHandles[cur]++;
return cur;
}
bool CArchive7Zip::IsOpen()
{
return isOpen;
}
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