ddnet/src/engine/shared/datafile.h

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/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
/* If you are missing that file, acquire a complete release at teeworlds.com. */
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#ifndef ENGINE_SHARED_DATAFILE_H
#define ENGINE_SHARED_DATAFILE_H
#include <base/hash.h>
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// raw datafile access
class CDataFileReader
{
struct CDatafile *m_pDataFile;
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void *GetDataImpl(int Index, int Swap);
int GetFileDataSize(int Index);
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public:
CDataFileReader() : m_pDataFile(0) {}
~CDataFileReader() { Close(); }
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bool IsOpen() const { return m_pDataFile != 0; }
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bool Open(class IStorage *pStorage, const char *pFilename, int StorageType);
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bool Close();
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void *GetData(int Index);
void *GetDataSwapped(int Index); // makes sure that the data is 32bit LE ints when saved
int GetDataSize(int Index);
void UnloadData(int Index);
void *GetItem(int Index, int *pType, int *pID);
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int GetItemSize(int Index);
void GetType(int Type, int *pStart, int *pNum);
void *FindItem(int Type, int ID);
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int NumItems();
int NumData();
void Unload();
SHA256_DIGEST Sha256();
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unsigned Crc();
int MapSize();
IOHANDLE File();
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};
// write access
class CDataFileWriter
{
struct CDataInfo
{
int m_UncompressedSize;
int m_CompressedSize;
void *m_pCompressedData;
};
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struct CItemInfo
{
int m_Type;
int m_ID;
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int m_Size;
int m_Next;
int m_Prev;
void *m_pData;
};
struct CItemTypeInfo
{
int m_Num;
int m_First;
int m_Last;
};
enum
{
MAX_ITEM_TYPES=0xffff,
MAX_ITEMS=1024,
MAX_DATAS=1024,
};
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IOHANDLE m_File;
int m_NumItems;
int m_NumDatas;
int m_NumItemTypes;
CItemTypeInfo *m_pItemTypes;
CItemInfo *m_pItems;
CDataInfo *m_pDatas;
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public:
CDataFileWriter();
~CDataFileWriter();
void Init();
bool OpenFile(class IStorage *pStorage, const char *pFilename);
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bool Open(class IStorage *pStorage, const char *Filename);
int AddData(int Size, void *pData);
int AddDataSwapped(int Size, void *pData);
int AddItem(int Type, int ID, int Size, void *pData);
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int Finish();
};
#endif