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Fortran and byte swapping
| Fortran and byte swapping [message #7677] |
Fri, 13 December 1996 00:00 |
Simon Williams
Messages: 5
Registered: October 1996
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Junior Member |
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I have a large dataset which is in Unformatted variable-length
records written in FORTRAN on a SUN (big endian). I want to
read it on a DEC alpha running OSF (little endian) using IDL.
It is not really practical to convert the whole dataset.
1. I Can't use "openr, ..... ,/f77_unformatted" because the
record length information stored in the file is byte-swapped
so it falls over on the first read.
2. I could drop the /f77_unformatted keyword and handle the
record structure myself, but even then I can't see a simple
way of doing it - I would need an IDL function which behaves
like readu, so that I can pass an arbitrary number of arguments
to it or I will have to clog up my routine with a load of
calls to byteorder for each parameter I read.
Any ideas? The nicest solution would be a "byteswap keyword" to
the open routines - like the one provided by dec fortran, but I
guess that's a bit much to ask!
Simon Williams
--
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Simon Williams British Atmospheric Data Centre
s.r.williams@rl.ac.uk Tel : 01235 446314 FAX : 01235 445848
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