On Fri, 23 Dec 2016 11:53:58 +0000, Graeme Geldenhuys <mailingli...@geldenhuys.co.uk> wrote:
>That problem is perfectly suited for regular expressions. And a rather >simple one at than. The FPC's FCL packages include a regex unit too >which should suite your needs. I was away over Xmas so I have not seen all this regexp discussion for my problem until now.... In past times I have come across solutions using regular expressions for example in shellscripts or similar. In most cases I saw that they worked but had a hard time understanding *how* they worked, the syntax is too dense for me. The actual problem I had was that a data processing program, I did not write myself, was using up extremely long times just loading the input data file so I was looking at alternate ways to read that data in. The program was written originally using RAD Studio 2007 by someone else and I "ported" it to RAD Studio XE5 a few years ago. But I did not get into the working code, just making the transfer to Unicode and updating the GUI. All processing code was untouched (except for changing string to ansistring where needed). It is a very math intensive processing package and I am no mathematician... Anyway, the original author was no real coder but a scientist so things like file I/O was not optimal. This shows up when reading the large actual data files, which could be hundreds of Mbytes in length. In his code it takes minutes to do! And this was the cause of my original question. Since it seemed rather general in nature I posted both here and in the Embarcadero forum... Now I am down to just seconds using the ReadLn + StringList.Delimitedtext way to parse the data. My goal now is to simply create a utility that transforms these files into binary format instead and add code to load the data into dynamic float arrays. The tests I did timed the conversion at some few seconds and once the binary files are created the load of these resulting binary data is done in fractions of a second. So I am pretty much done with this problem (without resorting to regexp usage). Thanks anyway for pointing out an alternate path! -- Bo Berglund Developer in Sweden _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
