How about if you wanted to change the contents of the start of a file? Does it work if you seek to the start of the file and write a couple of bytes, say, or do you have to rewrite the entire file?
2009/1/7 Andrew Brunner <andrew.t.brun...@gmail.com>: > You could c write specific calls to write a byte or segment of contiguous > bytes. > > FS.Seek(128,soFromBegining); > FS.WriteBuffer(fsBuffer[128],1); > > FS.Seek(132,soFromBegining); > FS.WriteBuffer(fsBuffer[132],1); > > > > On Tue, Jan 6, 2009 at 7:55 PM, Dave Coventry <dgcoven...@gmail.com> wrote: >> I've started using TFileStream since posting a query here, but I'd >> like to know a bit more about it. >> >> Is there somewhere that I can find information on how to use it? >> >> Specifically, if I load a file into an array as follows: >> >> FS:=TFileStream.Create(fname, fmshareDenyWrite); >> FS.ReadBuffer(fsbuffer,recsize); >> >> can I alter the array and then save the altered array back into the file? >> >> do I just write the entire array back? >> >> fsbuffer[128]:=56; >> fsbuffer[132]:=42; >> FS.WriteBuffer(fsbuffer,recsize); >> >> >> or is there a better way? >> _______________________________________________ >> Lazarus mailing list >> Lazarus@lazarus.freepascal.org >> http://www.lazarus.freepascal.org/mailman/listinfo/lazarus >> > _______________________________________________ > Lazarus mailing list > Lazarus@lazarus.freepascal.org > http://www.lazarus.freepascal.org/mailman/listinfo/lazarus > _______________________________________________ Lazarus mailing list Lazarus@lazarus.freepascal.org http://www.lazarus.freepascal.org/mailman/listinfo/lazarus
