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/* Project nGen
John DiCamillo Software Consulting
Copyright © 1997. All Rights Reserved.
SUBSYSTEM: DataFile.exe
FILE: Archive.hpp
AUTHOR: John DiCamillo
*/
#ifndef ARCHIVE_HPP
#define ARCHIVE_HPP
// +------------------------------------------------------------------+
#define VERSION 0x0010
#define BLOCK_SIZE 1024
#define MAX_FILES 4096
#define FILE_BLOCK 1024
#define NAMELEN 64
// +------------------------------------------------------------------+
struct DataHeader
{
DWORD version;
DWORD nfiles;
DWORD dir_blocks;
DWORD dir_size_comp;
DWORD dir_offset;
};
struct DataEntry
{
char name[NAMELEN];
DWORD size_orig;
DWORD size_comp;
DWORD offset;
};
class DataArchive
{
public:
// ctor:
DataArchive(const char* name = 0);
~DataArchive();
// operations:
void LoadDatafile(const char* name);
void Insert(const char* name);
void Extract(const char* name);
void Remove(const char* name);
void List();
void WriteEntry(int index, BYTE* buf);
int FindEntry(const char* req_name);
int ExpandEntry(int index, BYTE*& buf);
BYTE* CompressEntry(int index);
int InsertEntry(const char* name);
void RemoveEntry(int index);
DWORD Blocks(DWORD raw_size);
DWORD DirBlocks();
DWORD FileBlocks(int index);
int FindDataBlocks(int blocks_needed);
void CreateBlockMap();
DWORD NumFiles() { return header.nfiles; }
DataEntry* GetFile(int i) { if (i>=0 && i<(int)header.nfiles) return &directory[i]; return 0; }
private:
// persistent data members:
DataHeader header;
DataEntry directory[MAX_FILES];
BYTE* dirbuf;
// transient members:
char datafile[NAMELEN];
DWORD* block_map;
DWORD nblocks;
};
#endif
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