Intel fortran binary file format

It keeps telling me the file type is "not supported. Well, this MIDI file is just one example of the problem, namely reading in files where you want to examine their contents, but you dont know their origins ahead of time. Of course, once you DO know that, then there might be a better way to manipulate their contents.

I was wondering is: INTEL if had a tool where you can examine a file byte by byte without knowing its format ahead of time. Sorry, there should have been a space between the link and the comma after it. That is, the correct link is.

Just because I added a space! WSinc, you wrote: " Of course, once you DO know that, then there might be a better way to manipulate their contents. Sorry, in general inferring the structure of a file format from a small number of example files is extremely difficult and rarely worth the effort.

Reverse engineers and hackers have special skills and tools for that, and they would probably not use Fortran. Most people, after looking at a binary file without knowing something about its contents, would think that they are seeing random bytes. For more complete information about compiler optimizations, see our Optimization Notice. WSinc New Contributor I. Its allowing me to write records sequentially, but if I pick a record number, I cant do that. All forum topics Previous topic Next topic.

But I cannot pick a record randomly. Copy link. In response to WSinc. In response to mecej4. Anyway thanks for the helpful tips. Sorry, you must verify to complete this action.

Please click the verification link in your email. You may re-send via your profile. Unformatted files contain record-length information, encoded in a vendor-specific way, interspersed with the data, in the file.

The old tape and DASD files were not at all in harmony with the "stream of bytes" view that Unix adopted. TimP Black Belt. Copy link. The following example should perform ok. It ran in 48 seconds on a SSD and sufficient memory. All tests involved sequential writing or reading of records.

Craig B. Craig Craig, You are clearly modifying the compiler options. IanH Black Belt. IanH, 7 How is the record length determined without a format for how the data is written. It might be handy to have!

A file storage unit may not be the same thing as a byte and it isn't, by default, with ifort. I tried using gnuplot using the following commands: "splot 'filename. Please kindly if possible let me know how one could specify "k" so that it plot array i,j,k at that particular k. Post Reply. There is no difference in the two codes except the binary vs. I get the same problem even if I compile both versions with Intel Fortran compiler. The bigger file probably arises from the fact that you make many writes and each time you write the GNU compiler adds an integer at the beginning and end that describes the size of the written data.

I tried it previously, but did not work. Now I had to realize there is an additional aspect important regarding this problem. But this is incompatible with stream access. It did not work for me You don't show your code so it is hard to say more in detail. Add a comment. Active Oldest Votes. I wasn't able to find an exact duplicate, but has been treated here before. Vladimir F Vladimir F So selecting a record would only be possible after data is read.