summaryrefslogtreecommitdiffhomepage
path: root/StarsEx/Archive.h
blob: ac22f2886edcc1bb0976e8ecbdcad0a95fac0a5f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
/*  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

// +------------------------------------------------------------------+

#define VERSION      0x0010
#define BLOCK_SIZE   1024
#define FILE_BLOCK   1024
#define NAMELEN      64

// +------------------------------------------------------------------+

struct DataHeader
{
    static const char* TYPENAME() { return "DataHeader"; }

    DWORD    version;
    DWORD    nfiles;
    DWORD    dir_blocks;
    DWORD    dir_size_comp;
    DWORD    dir_offset;
};

struct DataEntry
{
    static const char* TYPENAME() { return "DataEntry"; }

    char     name[NAMELEN];
    DWORD    size_orig;
    DWORD    size_comp;
    DWORD    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, BYTE* buf);
    int      FindEntry(const char* req_name);
    int      ExpandEntry(int index, BYTE*& buf, bool null_terminate=false);
    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; }

    const char* Name()   const { return datafile; }

private:
    // persistent data members:
    DataHeader  header;
    DataEntry*  directory;
    BYTE*       dirbuf;

    // transient members:
    char        datafile[NAMELEN];

    DWORD*      block_map;
    DWORD       nblocks;
};

#endif  // Archive_h