85 lines
3.4 KiB
C
85 lines
3.4 KiB
C
|
/****************************************************************************
|
||
|
|
Copyright (c) 2006, Radon Labs GmbH
|
||
|
|
Copyright (c) 2011-2013,WebJet Business Division,CYOU
|
||
|
|
|
||
|
|
http://www.genesis-3d.com.cn
|
||
|
|
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
of this software and associated documentation files (the "Software"), to deal
|
||
|
|
in the Software without restriction, including without limitation the rights
|
||
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
copies of the Software, and to permit persons to whom the Software is
|
||
|
|
furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
The above copyright notice and this permission notice shall be included in
|
||
|
|
all copies or substantial portions of the Software.
|
||
|
|
|
||
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
THE SOFTWARE.
|
||
|
|
****************************************************************************/
|
||
|
|
#pragma once
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
@class IO::ZipFileSystem
|
||
|
|
|
||
|
|
An archive filesystem wrapper for ZIP files.
|
||
|
|
|
||
|
|
Uses the zlib and the minizip package under the hood.
|
||
|
|
|
||
|
|
Limitations:
|
||
|
|
* No write access.
|
||
|
|
* No seek on compressed data, the ZipFileSystem will generally decompress
|
||
|
|
an entire file into memory at once, so that the ZipStreamClass can
|
||
|
|
provide random access on the decompressed data. Thus the typical
|
||
|
|
"audio streaming scenario" is not possible from zip files (that's
|
||
|
|
what XACT's sound banks is there for anyway ;)
|
||
|
|
|
||
|
|
How to fix the no-seek problem:
|
||
|
|
* zlib processes datas in chunks, and cannot seek randomly within
|
||
|
|
a chunk, and the chunk size is dependent on the compress application
|
||
|
|
being used to create the zip file(?), if those internals are known,
|
||
|
|
it would be possible to write a chunked filesystem which keeps
|
||
|
|
buffered chunks around for each client, probably not worth the effort.
|
||
|
|
* Another appoach would be to split stream-files into "chunk-files"
|
||
|
|
before compressing, and to read the next complete chunk files
|
||
|
|
when new data is needed. This approach doesn't require changes to
|
||
|
|
the strip filesystem.
|
||
|
|
*/
|
||
|
|
#include "io/archfs/archivefilesystembase.h"
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
namespace IO
|
||
|
|
{
|
||
|
|
class ZipArchive;
|
||
|
|
|
||
|
|
class ZipFileSystem : public ArchiveFileSystemBase
|
||
|
|
{
|
||
|
|
__DeclareClass(ZipFileSystem);
|
||
|
|
__DeclareImageSingleton(ZipFileSystem);
|
||
|
|
public:
|
||
|
|
/// constructor
|
||
|
|
ZipFileSystem();
|
||
|
|
/// destructor
|
||
|
|
virtual ~ZipFileSystem();
|
||
|
|
|
||
|
|
/// setup the archive file system
|
||
|
|
void Setup();
|
||
|
|
/// discard the archive file system
|
||
|
|
void Discard();
|
||
|
|
|
||
|
|
/// find first archive which contains the file path
|
||
|
|
GPtr<Archive> FindArchiveWithFile(const URI& fileUri) const;
|
||
|
|
/// find first archive which contains the directory path
|
||
|
|
GPtr<Archive> FindArchiveWithDir(const URI& dirUri) const;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace IO
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
|
||
|
|
|