如何將C/C++程序轉譯成Delphi(九)

Case Integer of starts the variant part of the record. Each variant is identified by an ordinal value. This value has no meaning when the type is being used, but is required for declaration.

Please note the difference between a variant (case-) record and a record without case-declaration.

The following translation is wrong:

type



  PProcessHeapEntry = ^TProcessHeapEntry;



  TProcessHeapEntry = Record



    lpData: Pointer;



    cbData: DWord;



    cbOverhead: Byte;



    iRegionIndex: Byte;



    wFlags: Word;



    Block: Record



       hMem: Thandle



       Reserved : Array [0..2] of DWord;



    end;



    Region: Record



      dwCommittedSize: DWord;



      dwUnCommittedSize: DWord;



      lpFirstBlock: Pointer;



      lpLastBlock: Pointer



    end);



  end;

This wrong translation would cause Block and Region to be consecutive in memory, and not overlaid, as follows:

LpData, cbData, cbOverhead, iRegionIndex, wFlags

HMem, dwReserved

DwCommittedSize, dwUnCommittedSize, lpFirstBlock, lplastBlock

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