nglIZip* nglZipFS::GetStream(const nglZipPath& rPath)
{
Node* pNode = mRoot.Find(rPath);
if (!pNode)
return NULL;
if (!pNode->mIsLeaf)
return NULL;
unz_file_pos file_pos;
file_pos.num_of_file = pNode->mNumOfFile;
file_pos.pos_in_zip_directory = pNode->mPosInZipDirectory;
if (unzGoToFilePos(mpPrivate->mZip, &file_pos) != UNZ_OK)
return NULL;
if (unzOpenCurrentFile(mpPrivate->mZip) != UNZ_OK)
return NULL;
void* pUnzip = unzGetCurrentFile(mpPrivate->mZip);
if (!pUnzip)
return NULL;
return new nglIZip(this, pUnzip, pNode->mSize, pNode->mNumOfFile, pNode->mPosInZipDirectory);
}
nglIStream* nglZipFS::OpenRead(const nglPath& rPath)
{
nglString p(rPath.GetVolumeLessPath());
p.TrimLeft(_T('/'));
//wprintf(_T("trimed path '%s'\n"), p.GetChars());
nglPath path(p);
Node* pNode = mRoot.Find(path);
if (!pNode)
return NULL;
if (!pNode->mIsLeaf)
return NULL;
unz_file_pos file_pos;
file_pos.num_of_file = pNode->mNumOfFile;
file_pos.pos_in_zip_directory = pNode->mPosInZipDirectory;
if (unzGoToFilePos(mpPrivate->mZip, &file_pos) != UNZ_OK)
return NULL;
if (unzOpenCurrentFile(mpPrivate->mZip) != UNZ_OK)
return NULL;
void* pUnzip = unzGetCurrentFile(mpPrivate->mZip);
if (!pUnzip)
return NULL;
return new nglIZip(this, pUnzip, pNode->mSize, pNode->mNumOfFile, pNode->mPosInZipDirectory);
}
nglFileOffset nglZipFS::SetPos (void* pUnzip, nglFileOffset Where, nglIZip* pFile)
{
unzSetCurrentFile(mpPrivate->mZip, pUnzip);
char dummy[1024];
nglFileOffset Pos = GetPos(pUnzip);
if (Where < Pos)
{
unzCloseCurrentFile(mpPrivate->mZip);
unz_file_pos file_pos;
file_pos.num_of_file = pFile->mNumOfFile;
file_pos.pos_in_zip_directory = pFile->mPosInZipDirectory;
unzGoToFilePos(mpPrivate->mZip, &file_pos);
if (unzOpenCurrentFile(mpPrivate->mZip) != UNZ_OK)
return 0;
pUnzip = unzGetCurrentFile(mpPrivate->mZip);
if (!pUnzip)
return 0;
pFile->SetRef(pUnzip);
Pos = 0;
}
Where -= Pos;
while (Where > 0)
{
nglFileOffset size = MIN(Where, 1024);
nglSize res = Read(pUnzip, dummy, (long)size, 1, eEndianNative);
if (res <= 0) // An Error occured
return GetPos(pUnzip);
Where -= res;
}
return GetPos(pUnzip);
}
