Game Development Reference
In-Depth Information
{
int err = UNZ_OK;
LString ZipName = FName;
std::replace ( ZipName.begin(), ZipName.end(), '\\', '/' );
clPtr<iIStream> TheSource = FSourceFile;
TheSource->Seek(0);
5.
Decompress the data through the following code:
zlib_filefunc64_def ffunc;
fill_functions( FSourceFile.GetInternalPtr(), &ffunc );
unzFile uf = unzOpen2_64( "", &ffunc );
if ( unzLocateFile( uf, ZipName.c_str(), 0) != UNZ_OK )
{
return false;
}
err = ExtractCurrentFile_ZIP( uf,
Password.empty() ? NULL : Password.c_str(), FOut );
unzClose( uf );
return ( err == UNZ_OK );
}
How it works...
The
ExtractSingleFile()
method uses the
zlib
and
MiniZIP
libraries. In the
accompanying material, we have included the
libcompress.c
and
libcompress.h
iles that contain the amalgamated
zlib
,
MiniZIP,
and
libbzip2
sources.
The
2_MountPoints
example contains the
test.cpp
ile with the code to iterate an
archive ile:
clPtr<RawFile> File = new RawFile();
File->Open( "test.zip", "" );
clPtr<ArchiveReader> a = new ArchiveReader();
a->OpenArchive( new FileMapper(File) );
The
ArchiveReader
instance contains all the information about the contents of the
test.
zip
ile.
Loading resources asynchronously
The preface of this topic tells us we are going to develop an asynchronous resources loading
system in this chapter. We have completed all of the preparations for this. We are now
equipped with secure memory management, task queues, and inally, the
FileSystem
abstraction with archive ile support.
