int ArchiveFile::ExtractItem(int index, const char* outFilename) const
{
assert(!s_formatInfos.empty());
//assert(index >= 0 && index < m_numItems);
if(!(index >= 0 && index < m_numItems)) return 0;
ArchiveItem& item = m_items[index];
int rv = item.size;
#ifndef ANDROID
DWORD outAttributes = GetFileAttributes(outFilename);
if(outAttributes & FILE_ATTRIBUTE_READONLY)
SetFileAttributes(outFilename, outAttributes & ~FILE_ATTRIBUTE_READONLY); // temporarily remove read-only attribute so we can decompress to there
#endif
if(m_typeIndex < 0)
{
#ifndef ANDROID //I don't *think* we care about this
// uncompressed
if(!CopyFile(m_filename, outFilename, false))
#endif
rv = 0;
}
else
{
IInArchive* object = NULL;
HRESULT hr = E_FAIL;
if(SUCCEEDED(CreateObject(&s_formatInfos[m_typeIndex].guid, &IID_IInArchive, (void**)&object)))
{
InFileStream* ifs = new InFileStream(m_filename);
if(SUCCEEDED(object->Open(ifs,0,0)))
{
gameInfo.resize(rv);
OutStream* os = new OutStream(index, outFilename);
const UInt32 indices [1] = {index};
hr = object->Extract(indices, 1, 0, os);
object->Close();
}
object->Release();
}
if(FAILED(hr))
rv = 0;
}
#ifndef ANDROID
if(outAttributes & FILE_ATTRIBUTE_READONLY)
SetFileAttributes(outFilename, outAttributes); // restore read-only attribute
#endif
return rv;
}
int ArchiveFile::ExtractItem(int index, unsigned char* outBuffer, int bufSize) const
{
assert(!s_formatInfos.empty());
//assert(index >= 0 && index < m_numItems);
if(!(index >= 0 && index < m_numItems)) return 0;
ArchiveItem& item = m_items[index];
if(bufSize < item.size)
return 0;
if(m_typeIndex < 0)
{
// uncompressed
FILE* file = fopen(m_filename, "rb");
fread(outBuffer, 1, item.size, file);
fclose(file);
}
else
{
IInArchive* object = NULL;
HRESULT hr = E_FAIL;
if(SUCCEEDED(CreateObject(&s_formatInfos[m_typeIndex].guid, &IID_IInArchive, (void**)&object)))
{
InFileStream* ifs = new InFileStream(m_filename);
if(SUCCEEDED(object->Open(ifs,0,0)))
{
OutStream* os = new OutStream(index, outBuffer, item.size);
const UInt32 indices [1] = {index};
hr = object->Extract(indices, 1, 0, os);
object->Close();
}
object->Release();
}
if(FAILED(hr))
return 0;
}
return item.size;
}
ArchiveFile::ArchiveFile(const char* filename)
{
assert(!s_formatInfos.empty());
m_typeIndex = -1;
m_numItems = 0;
m_items = NULL;
m_filename = NULL;
FILE* file = fopen(filename, "rb");
if(!file)
return;
m_filename = new char[strlen(filename)+1];
strcpy(m_filename, filename);
// detect archive type using format signature in file
for(size_t i = 0; i < s_formatInfos.size() && m_typeIndex < 0; i++)
{
fseek(file, 0, SEEK_SET);
std::string& formatSig = s_formatInfos[i].signature;
int len = formatSig.size();
if(len == 0)
continue; // because some formats have no signature
char* fileSig = (char*)_alloca(len);
fread(fileSig, 1, len, file);
if(!memcmp(formatSig.c_str(), fileSig, len))
m_typeIndex = i;
}
// if no signature match has been found, detect archive type using filename.
// this is only for signature-less formats
const char* fileExt = strrchr(filename, '.');
if(fileExt++)
{
for(size_t i = 0; i < s_formatInfos.size() && m_typeIndex < 0; i++)
{
if(s_formatInfos[i].signature.empty())
{
std::vector<std::string>& formatExts = s_formatInfos[i].extensions;
for(size_t j = 0; j < formatExts.size(); j++)
{
if(!_stricmp(formatExts[j].c_str(), fileExt))
{
m_typeIndex = i;
break;
}
}
}
}
}
if(m_typeIndex < 0)
{
// uncompressed
m_numItems = 1;
m_items = new ArchiveItem[m_numItems];
fseek(file, 0, SEEK_END);
m_items[0].size = ftell(file);
m_items[0].name = new char[strlen(filename)+1];
strcpy(m_items[0].name, filename);
}
else
{
IInArchive* object = NULL;
if(SUCCEEDED(CreateObject(&s_formatInfos[m_typeIndex].guid, &IID_IInArchive, (void**)&object)))
{
InFileStream* ifs = new InFileStream(filename);
if(SUCCEEDED(object->Open(ifs,0,0)))
{
UInt32 numItems = 0;
object->GetNumberOfItems(&numItems);
m_numItems = numItems;
m_items = new ArchiveItem[m_numItems];
for(int i = 0; i < m_numItems; i++)
{
PROPVARIANT var = {VT_EMPTY};
ArchiveItem& item = m_items[i];
object->GetProperty(i, kpidSize, &var);
item.size = var.uhVal.LowPart;
object->GetProperty(i, kpidPath, &var);
std::string& path = wstrToStr(var.bstrVal);
item.name = new char[path.size()+1];
strcpy(item.name, path.c_str());
//object->GetProperty(i, kpidMethod, &var);
//std::string& method = wstrToStr(var.bstrVal);
//item.method = new char[method.size()+1];
//strcpy(item.method, method.c_str());
object->GetProperty(i, kpidEncrypted, &var);
#ifdef _NO_CRYPTO
if(var.boolVal)
item.size = 0; // don't support decompressing it, pretend size zero
#else
#error password support NYI... see client7z.cpp
item.encrypted = !!var.boolVal;
#endif
VariantClear((VARIANTARG*)&var);
}
object->Close();
}
object->Release();
}
}
fclose(file);
}