Re: winapi WriteFile single byte and buffering

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#782

From: Asger Joergensen
Date: Thu, 10 Jan 2008 10:18

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Hi John
 
 John Grabner says:
> I am using WrtieFile to write a lot of single bytes to a file. Reading 
> the documentation I cannot work out if I can have a buffered write and 
> if so how do to do a buffered write.

An idea:

class TBufferWrite
{
   AnsiString FBuffer;// or another type of buffer
   int FMaxBuffer, FBufferSize;
   HANDLE hFile;

   void __fastcall WriteBufferToFile(){FBufferSize = 0;};

public:

   __fastcall TBufferWrite()
   : FMaxBuffer(0)
   , hFile(0)
   , FBufferSize(0){}
   __fastcall ~TBufferWrite(){/*Close the File if open*/}

   bool __fastcall OpenFile(AnsiString FileName);
   bool __fastcall WriteFile(char aChar)
   {
      ++FBufferSize;
      FBuffer += aChar;
      if(FBufferSize >= FMaxBuffer)
         WriteBufferToFile();
   }
   void __fastcall CloseFile();
};

Code not tested in anyway..

Kind regards
Asger

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From: Asger Joergensen <junk@Asger-P.dk>
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Subject: Re: winapi WriteFile single byte and buffering
Date: Thu, 10 Jan 2008 11:18:32 +0100
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