// Direct File Operations:
bool nglZipFS::Close(void* pUnzip)
{
if (pUnzip == NULL)
return false;
unzSetCurrentFile(mpPrivate->mZip, pUnzip);
return UNZ_CRCERROR != unzCloseCurrentFile(mpPrivate->mZip);
}
nglStreamState nglZipFS::GetState(void* pUnzip) const
{
if (pUnzip == NULL)
return eStreamError;
unzSetCurrentFile(mpPrivate->mZip, pUnzip);
if (unzeof(mpPrivate->mZip))
return eStreamEnd;
return eStreamReady;
}
nglSize nglZipFS::Read (void* pUnzip, void* pData, nglSize WordCount, uint WordSize, nglEndian nglEndian)
{
if (unzSetCurrentFile(mpPrivate->mZip, pUnzip) != UNZ_OK)
return 0;
nglSize done = unzReadCurrentFile(mpPrivate->mZip, pData, WordCount * WordSize);
done /= WordSize;
if ((done > 0) && (nglEndian != eEndianNative))
{
switch (WordSize)
{
case 2: bswap_16_s ((uint16*)pData, done); break;
case 4: bswap_32_s ((uint32*)pData, done); break;
case 8: bswap_64_s ((uint64*)pData, done); break;
}
}
return done;
}
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);
}
nglFileOffset nglZipFS::GetPos(void* pUnzip) const
{
unzSetCurrentFile(mpPrivate->mZip, pUnzip);
return unztell(mpPrivate->mZip);
}
