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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _BUFFERED_ARCHIVE_H
#define _BUFFERED_ARCHIVE_H
#include <map>
#include "System/Threading/SpringThreading.h"
#include "IArchive.h"
/**
* Provides a helper implementation for archive types that can only uncompress
* one file to memory at a time.
*/
class CBufferedArchive : public IArchive
{
public:
CBufferedArchive(const std::string& name, bool cache = true);
virtual ~CBufferedArchive() {}
virtual bool GetFile(unsigned int fid, std::vector<std::uint8_t>& buffer);
protected:
virtual bool GetFileImpl(unsigned int fid, std::vector<std::uint8_t>& buffer) = 0;
spring::mutex archiveLock; // neither 7zip nor zlib are threadsafe
struct FileBuffer {
FileBuffer(): populated(false), exists(false) {}
FileBuffer(const FileBuffer& fb) = delete;
FileBuffer(FileBuffer&& fb) { *this = std::move(fb); }
FileBuffer& operator = (const FileBuffer& fb) = delete;
FileBuffer& operator = (FileBuffer&& fb) {
populated = fb.populated;
exists = fb.exists;
data = std::move(fb.data);
return *this;
}
bool populated; // files may be empty (0 bytes)
bool exists;
std::vector<std::uint8_t> data;
};
std::vector<FileBuffer> cache; // cache[fileId]
private:
bool caching;
};
#endif // _BUFFERED_ARCHIVE_H
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