| 1 | {$INCLUDE Switches.inc}
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| 2 | unit CmdList;
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| 3 |
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| 4 | interface
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| 5 |
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| 6 | uses
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| 7 | Classes, SysUtils, Math;
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| 8 |
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| 9 | const
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| 10 | MaxDataSize = 1024;
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| 11 | CommandDataElementSize = 4;
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| 12 | CommandDataElementCountMask = $f;
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| 13 | CommandDataMaxSize = CommandDataElementSize * CommandDataElementCountMask;
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| 14 |
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| 15 | type
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| 16 | TLogData = array [0 .. 999999999] of Byte;
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| 17 |
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| 18 | TCmdListState = record
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| 19 | nLog: Integer; { used size of LogData in bytes }
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| 20 | LoadPos: Integer; { position in LogData when loading a game }
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| 21 | LastMovingUnit: Integer;
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| 22 | MoveCode: Cardinal;
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| 23 | LoadMoveCode: Cardinal;
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| 24 | end;
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| 25 |
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| 26 | TCmdList = class
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| 27 | constructor Create;
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| 28 | destructor Destroy; override;
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| 29 | procedure Get(var Command, Player, Subject: integer; var Data: pointer);
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| 30 | procedure GetDataChanges(Data: pointer; DataSize: integer);
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| 31 | procedure Put(Command, Player, Subject: integer; Data: pointer);
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| 32 | procedure PutDataChanges(Command, Player: integer;
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| 33 | OldData, NewData: pointer; DataSize: integer);
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| 34 | procedure LoadFromFile(const f: TFileStream);
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| 35 | procedure SaveToFile(const f: TFileStream);
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| 36 | procedure AppendToFile(const f: TFileStream; const OldState: TCmdListState);
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| 37 | procedure Cut;
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| 38 | function Progress: integer;
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| 39 | private
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| 40 | LogAlloc: integer; { allocated size of LogData in bytes }
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| 41 | LogData: ^TLogData;
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| 42 | FState: TCmdListState;
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| 43 | procedure PutData(Data: pointer; Length: integer);
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| 44 | procedure CompleteMoveCode;
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| 45 | public
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| 46 | property State: TCmdListState read FState write FState;
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| 47 | end;
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| 48 |
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| 49 | function CommandWithData(Command: Integer; DataSize: Byte): Integer;
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| 50 |
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| 51 | resourcestring
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| 52 | SCommandDataSizeError = 'Command data size %d out of range (0-%d).';
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| 53 |
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| 54 |
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| 55 | implementation
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| 56 |
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| 57 | uses
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| 58 | Protocol;
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| 59 |
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| 60 | const
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| 61 | LogGrow = 1 shl 18;
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| 62 |
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| 63 | type
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| 64 | TData = array [0 .. MaxDataSize - 1] of Cardinal;
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| 65 | PData = ^TData;
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| 66 |
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| 67 | function CommandWithData(Command: Integer; DataSize: Byte): Integer;
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| 68 | var
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| 69 | DataElementCount: Byte;
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| 70 | begin
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| 71 | if DataSize > CommandDataMaxSize then
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| 72 | raise Exception.Create(Format(SCommandDataSizeError, [DataSize, CommandDataMaxSize]));
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| 73 | DataElementCount := Ceil(DataSize / CommandDataElementSize);
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| 74 | Result := Command or (DataElementCount and CommandDataElementCountMask);
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| 75 | end;
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| 76 |
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| 77 | constructor TCmdList.Create;
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| 78 | begin
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| 79 | inherited;
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| 80 | FState.nLog := 0;
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| 81 | LogAlloc := 0;
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| 82 | LogData := nil;
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| 83 | FState.LastMovingUnit := -1;
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| 84 | FState.MoveCode := 0;
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| 85 | FState.LoadMoveCode := 0;
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| 86 | end;
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| 87 |
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| 88 | destructor TCmdList.Destroy;
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| 89 | begin
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| 90 | ReallocMem(LogData, 0);
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| 91 | inherited;
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| 92 | end;
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| 93 |
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| 94 | procedure TCmdList.Get(var Command, Player, Subject: integer; var Data: pointer);
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| 95 | var
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| 96 | DirCode: Cardinal;
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| 97 | Code: Cardinal;
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| 98 | begin
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| 99 | if FState.LoadMoveCode > 0 then
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| 100 | begin
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| 101 | Player := -1;
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| 102 | if FState.LoadMoveCode and 1 = 1 then
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| 103 | begin // FM
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| 104 | DirCode := FState.LoadMoveCode shr 1 and 7;
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| 105 | Subject := FState.LastMovingUnit;
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| 106 | FState.LoadMoveCode := FState.LoadMoveCode shr 4;
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| 107 | end
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| 108 | else
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| 109 | begin // M
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| 110 | DirCode := FState.LoadMoveCode shr 3 and 7;
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| 111 | Subject := FState.LoadMoveCode shr 6 and $FFF;
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| 112 | FState.LoadMoveCode := FState.LoadMoveCode shr 18;
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| 113 | FState.LastMovingUnit := Subject
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| 114 | end;
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| 115 | case DirCode of
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| 116 | 0: Command := sMoveUnit + $090;
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| 117 | 1: Command := sMoveUnit + $0F0;
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| 118 | 2: Command := sMoveUnit + $390;
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| 119 | 3: Command := sMoveUnit + $3F0;
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| 120 | 4: Command := sMoveUnit + $020;
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| 121 | 5: Command := sMoveUnit + $060;
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| 122 | 6: Command := sMoveUnit + $100;
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| 123 | 7: Command := sMoveUnit + $300;
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| 124 | end;
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| 125 | Data := nil;
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| 126 | end
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| 127 | else
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| 128 | begin
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| 129 | code := Cardinal((@LogData[FState.LoadPos])^);
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| 130 | if code and 3 = 0 then
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| 131 | begin // non-clientex command
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| 132 | Command := code shr 2 and $3FFF + sExecute;
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| 133 | Player := code shr 16 and $F;
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| 134 | Subject := code shr 20 and $FFF;
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| 135 | inc(FState.LoadPos, 4);
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| 136 | end
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| 137 | else if code and 7 = 2 then
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| 138 | begin // clientex command
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| 139 | Command := code shr 3 and $FFFF;
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| 140 | Player := code shr 19 and $F;
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| 141 | Subject := 0;
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| 142 | inc(FState.LoadPos, 3);
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| 143 | end
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| 144 | else
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| 145 | begin // move command shortcut
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| 146 | if (code and 1 = 1) and (code and (7 shl 4) <> 6 shl 4) then
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| 147 | begin
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| 148 | FState.LoadMoveCode := code and $FF;
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| 149 | inc(FState.LoadPos);
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| 150 | end
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| 151 | else
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| 152 | begin
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| 153 | FState.LoadMoveCode := code and $FFFFFF;
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| 154 | inc(FState.LoadPos, 3);
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| 155 | end;
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| 156 | Get(Command, Player, Subject, Data);
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| 157 | Exit;
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| 158 | end;
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| 159 |
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| 160 | if Command and CommandDataElementCountMask = 0 then
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| 161 | Data := nil
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| 162 | else
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| 163 | begin
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| 164 | Data := @LogData[FState.LoadPos];
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| 165 | inc(FState.LoadPos, Command and CommandDataElementCountMask * CommandDataElementSize);
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| 166 | end;
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| 167 | end;
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| 168 | end;
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| 169 |
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| 170 | procedure TCmdList.GetDataChanges(Data: pointer; DataSize: integer);
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| 171 | var
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| 172 | b0, b1: integer;
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| 173 | Map0, Map1: Cardinal;
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| 174 | begin
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| 175 | Map0 := Cardinal((@LogData[FState.LoadPos])^);
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| 176 | inc(FState.LoadPos, 4);
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| 177 | b0 := 0;
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| 178 | while Map0 > 0 do begin
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| 179 | if Map0 and 1 <> 0 then begin
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| 180 | Map1 := Cardinal((@LogData[FState.LoadPos])^);
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| 181 | inc(FState.LoadPos, 4);
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| 182 | for b1 := 0 to 31 do
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| 183 | if 1 shl b1 and Map1 <> 0 then begin
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| 184 | if b0 * 32 + b1 < DataSize then
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| 185 | PData(Data)[b0 * 32 + b1] := Cardinal((@LogData[FState.LoadPos])^);
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| 186 | inc(FState.LoadPos, 4);
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| 187 | end;
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| 188 | end;
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| 189 | inc(b0);
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| 190 | Map0 := Map0 shr 1;
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| 191 | end;
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| 192 | end;
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| 193 |
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| 194 | procedure TCmdList.Put(Command, Player, Subject: integer; Data: pointer);
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| 195 | var
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| 196 | DirCode, code: Cardinal;
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| 197 | begin
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| 198 | if Command and $FC00 = sMoveUnit then
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| 199 | begin // move command shortcut
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| 200 | case Command of
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| 201 | sMoveUnit + $090: DirCode := 0;
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| 202 | sMoveUnit + $0F0: DirCode := 1;
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| 203 | sMoveUnit + $390: DirCode := 2;
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| 204 | sMoveUnit + $3F0: DirCode := 3;
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| 205 | sMoveUnit + $020: DirCode := 4;
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| 206 | sMoveUnit + $060: DirCode := 5;
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| 207 | sMoveUnit + $100: DirCode := 6;
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| 208 | sMoveUnit + $300: DirCode := 7;
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| 209 | end;
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| 210 | if Subject = FState.LastMovingUnit then
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| 211 | code := 1 + DirCode shl 1
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| 212 | else
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| 213 | code := 6 + DirCode shl 3 + Cardinal(Subject) shl 6;
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| 214 | if FState.MoveCode = 0 then
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| 215 | FState.MoveCode := code
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| 216 | else if FState.MoveCode and 1 = 1 then
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| 217 | begin // FM + this
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| 218 | FState.MoveCode := FState.MoveCode + code shl 4;
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| 219 | if code and 1 = 1 then
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| 220 | PutData(@FState.MoveCode, 1) // FM + FM
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| 221 | else
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| 222 | PutData(@FState.MoveCode, 3); // FM + M
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| 223 | FState.MoveCode := 0;
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| 224 | end
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| 225 | else if code and 1 = 1 then
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| 226 | begin // M + FM
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| 227 | FState.MoveCode := FState.MoveCode + code shl 18;
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| 228 | PutData(@FState.MoveCode, 3);
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| 229 | FState.MoveCode := 0;
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| 230 | end
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| 231 | else // M + M
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| 232 | begin
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| 233 | PutData(@FState.MoveCode, 3);
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| 234 | FState.MoveCode := code;
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| 235 | end;
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| 236 | FState.LastMovingUnit := Subject;
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| 237 | end
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| 238 | else
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| 239 | begin
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| 240 | CompleteMoveCode;
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| 241 | if Command >= cClientEx then
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| 242 | begin
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| 243 | code := 2 + Command shl 3 + Player shl 19;
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| 244 | PutData(@code, 3);
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| 245 | end
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| 246 | else
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| 247 | begin
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| 248 | code := Cardinal(Command - sExecute) shl 2 + Cardinal(Player) shl 16 +
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| 249 | Cardinal(Subject) shl 20;
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| 250 | PutData(@code, 4);
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| 251 | end;
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| 252 | end;
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| 253 | if Command and CommandDataElementCountMask <> 0 then
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| 254 | PutData(Data, Command and CommandDataElementCountMask * CommandDataElementSize);
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| 255 | end;
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| 256 |
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| 257 | procedure TCmdList.PutDataChanges(Command, Player: integer;
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| 258 | OldData, NewData: pointer; DataSize: integer);
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| 259 | var
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| 260 | MapPos, LogPos, b0, b1, RowEnd: integer;
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| 261 | Map0, Map1, code: Cardinal;
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| 262 | begin
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| 263 | if DataSize <= 0 then
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| 264 | exit;
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| 265 | if DataSize > MaxDataSize then
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| 266 | DataSize := MaxDataSize;
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| 267 | CompleteMoveCode;
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| 268 | MapPos := FState.nLog + 8;
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| 269 | LogPos := MapPos + 4;
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| 270 | Map0 := 0;
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| 271 | for b0 := 0 to (DataSize - 1) div 32 do
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| 272 | begin
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| 273 | if LogPos + 4 * 32 > LogAlloc then
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| 274 | begin
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| 275 | inc(LogAlloc, LogGrow);
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| 276 | ReallocMem(LogData, LogAlloc);
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| 277 | end;
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| 278 | Map0 := Map0 shr 1;
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| 279 | Map1 := 0;
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| 280 | RowEnd := DataSize - 1;
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| 281 | if RowEnd > b0 * 32 + 31 then
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| 282 | RowEnd := b0 * 32 + 31;
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| 283 | for b1 := b0 * 32 to RowEnd do
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| 284 | begin
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| 285 | Map1 := Map1 shr 1;
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| 286 | if PData(NewData)[b1] <> PData(OldData)[b1] then
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| 287 | begin
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| 288 | Cardinal((@LogData[LogPos])^) := PData(NewData)[b1];
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| 289 | inc(LogPos, 4);
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| 290 | inc(Map1, $80000000);
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| 291 | end;
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| 292 | end;
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| 293 | if Map1 > 0 then
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| 294 | begin
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| 295 | Map1 := Map1 shr (b0 * 32 + 31 - RowEnd);
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| 296 | Cardinal((@LogData[MapPos])^) := Map1;
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| 297 | MapPos := LogPos;
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| 298 | inc(LogPos, 4);
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| 299 | inc(Map0, $80000000);
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| 300 | end;
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| 301 | end;
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| 302 | if Map0 = 0 then
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| 303 | exit; // no changes
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| 304 |
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| 305 | Map0 := Map0 shr (31 - (DataSize - 1) div 32);
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| 306 | Cardinal((@LogData[FState.nLog + 4])^) := Map0;
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| 307 | code := Cardinal(Command - sExecute) shl 2 + Cardinal(Player) shl 16;
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| 308 | Cardinal((@LogData[FState.nLog])^) := code;
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| 309 | FState.nLog := MapPos;
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| 310 | end;
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| 311 |
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| 312 | procedure TCmdList.PutData(Data: pointer; Length: integer);
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| 313 | begin
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| 314 | if FState.nLog + Length > LogAlloc then
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| 315 | begin
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| 316 | inc(LogAlloc, LogGrow);
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| 317 | ReallocMem(LogData, LogAlloc);
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| 318 | end;
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| 319 | move(Data^, LogData[FState.nLog], Length);
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| 320 | inc(FState.nLog, Length);
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| 321 | end;
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| 322 |
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| 323 | procedure TCmdList.CompleteMoveCode;
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| 324 | begin
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| 325 | if FState.MoveCode > 0 then
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| 326 | begin
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| 327 | if FState.MoveCode and 1 = 1 then
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| 328 | PutData(@FState.MoveCode, 1) // Single FM
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| 329 | else
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| 330 | PutData(@FState.MoveCode, 3); // Single M
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| 331 | FState.MoveCode := 0;
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| 332 | end;
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| 333 | end;
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| 334 |
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| 335 | procedure TCmdList.LoadFromFile(const f: TFileStream);
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| 336 | begin
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| 337 | f.read(FState.nLog, 4);
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| 338 | LogData := nil;
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| 339 | LogAlloc := ((FState.nLog + 2) div LogGrow + 1) * LogGrow;
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| 340 | ReallocMem(LogData, LogAlloc);
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| 341 | f.read(LogData^, FState.nLog);
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| 342 | FState.LoadPos := 0;
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| 343 | end;
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| 344 |
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| 345 | procedure TCmdList.SaveToFile(const f: TFileStream);
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| 346 | begin
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| 347 | CompleteMoveCode;
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| 348 | f.write(FState.nLog, 4);
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| 349 | f.write(LogData^, FState.nLog);
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| 350 | end;
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| 351 |
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| 352 | procedure TCmdList.AppendToFile(const f: TFileStream;
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| 353 | const OldState: TCmdListState);
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| 354 | begin
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| 355 | CompleteMoveCode;
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| 356 | f.write(FState.nLog, 4);
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| 357 | f.Position := f.Position + OldState.nLog;
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| 358 | f.write(LogData[OldState.nLog], FState.nLog - OldState.nLog);
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| 359 | end;
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| 360 |
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| 361 | procedure TCmdList.Cut;
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| 362 | begin
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| 363 | FState.nLog := FState.LoadPos;
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| 364 | end;
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| 365 |
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| 366 | function TCmdList.Progress: integer;
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| 367 | begin
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| 368 | if (FState.LoadPos = FState.nLog) and (FState.LoadMoveCode = 0) then
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| 369 | result := 1000 // loading complete
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| 370 | else if FState.nLog > 1 shl 20 then
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| 371 | result := (FState.LoadPos shr 8) * 999 div (FState.nLog shr 8)
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| 372 | else
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| 373 | result := FState.LoadPos * 999 div FState.nLog;
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| 374 | end;
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| 375 |
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| 376 | { Format Specification:
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| 377 |
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| 378 | Non-ClientEx-Command:
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| 379 | Byte3 Byte2 Byte1 Byte0
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| 380 | ssssssss sssspppp cccccccc cccccc00
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| 381 | (c = Command-sExecute, p = Player, s = Subject)
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| 382 |
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| 383 | ClientEx-Command:
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| 384 | Byte2 Byte1 Byte0
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| 385 | 0ppppccc cccccccc ccccc010
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| 386 | (c = Command, p = Player)
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| 387 |
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| 388 | Single Move:
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| 389 | Byte2 Byte1 Byte0
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| 390 | 000000ss ssssssss ssaaa110
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| 391 | (a = Direction, s = Subject)
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| 392 |
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| 393 | Move + Follow Move:
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| 394 | Byte2 Byte1 Byte0
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| 395 | 00bbb1ss ssssssss ssaaa110
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| 396 | (a = Direction 1, s = Subject 1, b = Direction 2)
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| 397 |
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| 398 | Follow Move + Move:
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| 399 | Byte2 Byte1 Byte0
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| 400 | 00ssssss ssssssbb b110aaa1
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| 401 | (a = Direction 1, b = Direction 2, s = Subject 2)
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| 402 |
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| 403 | Single Follow Move:
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| 404 | Byte0
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| 405 | 0000aaa1
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| 406 | (a = Direction)
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| 407 |
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| 408 | Double Follow Move:
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| 409 | Byte0
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| 410 | bbb1aaa1
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| 411 | (a = Direction 1, b = Direction 2)
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| 412 | }
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| 413 |
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| 414 | end.
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