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- Unit BD2Array; {Useable 2-Dimensional BufferedArrays}
- {$R-}
-
- INTERFACE
- Uses BD2_Max;
-
- Type
- BD2_IntArray = Object (D2_BufferedArray)
-
- Procedure Init (Max1,Max2,MaxBuffSize : LongInt;
- FileName : String);
-
- { BD2_xxxArrays are indexed 0..Max1-1, 0..Max2-1}
-
- Procedure Load (FileName : String;
- Max1,Max2,MaxBuffSize : LongInt);
-
- Procedure Accept (X,Y : LongInt; I : Integer);
-
- Procedure Retrieve (X,Y : LongInt; Var I : Integer);
-
- {NOTE: There is no reason why Retrieve could not be}
- {redefined as a function for atomic types such as Integer}
-
- Procedure Copy (From : BD2_IntArray);
- {Target *MUST* already be initialized}
- {to the EXACT same parameters as From}
- {this will save checking for sufficient}
- {available Memory!}
-
- (* no redefinition needed
-
- Procedure Store;
-
- Procedure Swap (X1,Y1,X2,Y2 : LongInt);
- {Swap the 1 and 2 Element}
-
- Function MaxIndex (Index : Byte) : LongInt;
- {Return the Max legal Index}
- {for the Indexth Dimension}
-
- Function MaxSize : LongInt;
- {Report Number of Array Elements}
- Function ElemSize : Word; {Report Element Size}
- Procedure Destroy;
- *)
- End; {BD2_IntArray}
-
- IMPLEMENTATION
-
- Uses BND_Max; {Obtain the definition of the DimensionPtr Type}
-
- Procedure BD2_IntArray.Init;
- {NOTE: If ANY of the Max's is zero, ND_MAX.INIT will attempt}
- {to determine and allocate the maximum possible index. If all}
- {are zero, then the largest possible evenly-indexed array will be allocated}
- {There is a POSSIBILITY of allocation errors if less than all are}
- {zero, but such errors will be detected and reported}
- Var
- Temp : DimensionPtr;
- I : Byte;
- Begin
- I := 0;
- GetMem (Temp,2*SizeOf(LongInt));
- Temp^[I] := Max1; I := 1; {Have to fool the compiler, even}
- Temp^[I] := Max2; {with Range-checking off!!}
- D2_BufferedArray.Init (Temp,SizeOf(Integer),MaxBuffSize,FileName);
- FreeMem (Temp,2*SizeOf(LongInt));
- End;
-
- Procedure BD2_IntArray.Load;
- Var
- Temp : DimensionPtr;
- I : Byte;
- Begin
- I := 0;
- GetMem (Temp,2*SizeOf(LongInt));
- Temp^[I] := Max1; I := 1; {Have to fool the compiler, even}
- Temp^[I] := Max2; {with Range-checking off!!}
- D2_BufferedArray.Load (FileName,SizeOf(Integer),MaxBuffSize,2,Temp);
- FreeMem (Temp,2*SizeOf(LongInt));
- End;
-
- Procedure BD2_IntArray.Accept (X,Y : LongInt; I : Integer);
- Var
- Temp : Integer;
- Begin
- Temp := I;
- D2_BufferedArray.Accept (X,Y,Temp,SizeOf(Integer))
- End;
-
- Procedure BD2_IntArray.Retrieve (X,Y : LongInt; Var I : Integer);
- Var
- Temp : Integer;
- Begin
- D2_BufferedArray.Retrieve (X,Y,Temp,SizeOf(Integer));
- I := Temp
- End;
-
- Procedure BD2_IntArray.Copy (From : BD2_IntArray);
- {Redefined purely for type-checking}
- Begin
- D2_BufferedArray.Copy (From)
- End;
-
- BEGIN
- END.