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https://github.com/red-prig/fpPS4.git
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94 lines
1.6 KiB
ObjectPascal
94 lines
1.6 KiB
ObjectPascal
unit srCFGCursor;
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{$mode ObjFPC}{$H+}
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interface
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uses
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srCFGLabel,
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srCFGParser,
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ginodes,
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srNode;
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type
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PsrCursor=^TsrCursor;
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TsrCursor=object(TsrLCursor)
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pCode:PsrCodeBlock;
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pBlock:PsrCFGBlock;
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function PopBlock:Boolean;
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end;
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TsrCodeList=specialize TNodeQueue<PsrCodeBlock>;
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PsrCodeHeap=^TsrCodeHeap;
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TsrCodeHeap=object(TsrCodeList)
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FEmit:TCustomEmit;
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Procedure Init(Emit:TCustomEmit);
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function FindByPtr(base:Pointer):PsrCodeBlock;
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function FetchByPtr(base:Pointer;bType:TsrBlockType):TsrCursor;
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end;
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implementation
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//
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Procedure TsrCodeHeap.Init(Emit:TCustomEmit);
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begin
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FEmit:=Emit;
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end;
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function TsrCodeHeap.FindByPtr(base:Pointer):PsrCodeBlock;
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var
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node:PsrCodeBlock;
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begin
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Result:=nil;
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node:=pHead;
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While (node<>nil) do
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begin
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if node^.IsContain(base) then
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begin
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Exit(node);
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end;
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node:=node^.pNext;
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end;
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end;
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function TsrCodeHeap.FetchByPtr(base:Pointer;bType:TsrBlockType):TsrCursor;
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var
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node:PsrCodeBlock;
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adr:TSrcAdr;
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begin
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node:=FindByPtr(base);
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if (node=nil) then
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begin
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node:=FEmit.Alloc(SizeOf(TsrCodeBlock));
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node^.FEmit:=FEmit;
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if parse_code_cfg(bType,base,node)>1 then Assert(False);
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Push_tail(node);
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end;
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Result:=Default(TsrCursor);
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Result.Init(node^.Body);
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Result.pCode :=node;
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Result.pBlock:=@node^.FTop;
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adr:=Default(TSrcAdr);
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adr.pBody:=node^.Body;
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adr.Offdw:=(Pointer(base)-Pointer(adr.pBody)) div 4;
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Result.Adr:=adr;
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Result.pBlock:=Result.pBlock^.DownBlock(adr);
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end;
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function TsrCursor.PopBlock:Boolean;
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begin
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Result:=False;
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if (pBlock=nil) then Exit;
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if (pBlock^.pParent=nil) then Exit;
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pBlock:=pBlock^.pParent;
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Result:=True;
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end;
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end.
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