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/* Starshatter: The Open Source Project
Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors
Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
Copyright (c) 1997-2006, Destroyer Studios LLC.
AUTHOR: John DiCamillo
*/
#ifndef Archive_h
#define Archive_h
#include <cstdint>
// +------------------------------------------------------------------+
namespace Archive
{
static constexpr std::uint32_t VERSION {0x0010};
static constexpr std::size_t BLOCK_SIZE {1024};
static constexpr std::size_t NAMELEN {64};
}
// +------------------------------------------------------------------+
struct DataHeader
{
static const char* TYPENAME() { return "DataHeader"; }
std::uint32_t version;
std::uint32_t nfiles;
std::uint32_t dir_blocks;
std::uint32_t dir_size_comp;
std::uint32_t dir_offset;
};
struct DataEntry
{
static const char* TYPENAME() { return "DataEntry"; }
char name[Archive::NAMELEN];
std::uint32_t size_orig;
std::uint32_t size_comp;
std::uint32_t offset;
};
class DataArchive
{
public:
static const char* TYPENAME() { return "DataArchive"; }
// 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, std::uint8_t* buf);
int FindEntry(const char* req_name);
int ExpandEntry(int index, std::uint8_t*& buf, bool null_terminate=false);
std::uint8_t* CompressEntry(int index);
int InsertEntry(const char* name);
void RemoveEntry(int index);
std::uint32_t Blocks(std::uint32_t raw_size);
std::uint32_t DirBlocks();
std::uint32_t FileBlocks(int index);
int FindDataBlocks(int blocks_needed);
void CreateBlockMap();
std::uint32_t NumFiles() { return header.nfiles; }
DataEntry* GetFile(int i) { if (i>=0 && i<(int)header.nfiles) return &directory[i]; return 0; }
const char* Name() const { return datafile; }
private:
// persistent data members:
DataHeader header;
DataEntry* directory;
std::uint8_t* dirbuf;
// transient members:
char datafile[Archive::NAMELEN];
std::uint32_t* block_map;
std::uint32_t nblocks;
};
#endif // Archive_h
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