On Sun, 14 Oct 2018 15:50:56 +0200 (CEST), in gmane.comp.compilers.free-pascal.general you wrote:
>> This throws an error at SeekEof: >> >> AssignFile(F, FileName); >> if AppendToFile then >> SeekEof(F) >> else >> Rewrite(F,1); >> BlockWrite(F, Buf[0], Length(Buf)); >> CloseFile(F); > >Was the Seek() function punished by you ? :) > >https://www.freepascal.org/docs-html/rtl/system/seek.html Yes, I looked at that too, but it requires me to supply the current size of the file as the second argument.... What will happen if the file does not exist yet? Do I have to test for that too or will the Reset/Rewrite calls handle this? >Additionally, you must always open the file usng reset or rewrite. >SeekEOF (or Seek) when you didn't open the file first, is wrong. Yes, I had not completed the code yet because of this issue with the way to put the position at end of file... >For appending to an existing untyped file, you must call reset(), then call >Seek. > Now I have changed to this, and it compiles without errors. But I can't test yet because oteher parts of the code supplying the data is not ready... AssignFile(F, FileName); if AppendToFile then begin Reset(F, 1); Seek(F,FileSize(F)); // Does FileSize provide the size in bytes? end else Rewrite(F,1); BlockWrite(F, Buf[0], Length(Buf)); CloseFile(F); > In general, I would recommend using streams for binary IO. I am pretty uncomfortable using streams. Don't really know how they work... (I am an old hand, started using Pascal on the Apple II, then T-Pascal on IBM PC etc. That was back in the 1980:es... Delphi since about 1995-96) -- Bo Berglund Developer in Sweden _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
