Input format and NaNs

I have a datafile that I'm trying to read that has NaNs in it, on
occasion, where the result of a calculation in another language was a NaN.
Where there aren't NaNs there are floating point numbers.

Is there a format specifier I can use that won't puke on NaN in the input
stream, or do I have to read things into a string, check for NaN and then
using an internal read if there isn't a NaN or preprocess the file with
something else to replace the NaNs with a "known bad value" that FORTRAN
can read on it's own?

Using Salford f95 compiler, if it makes a difference.

TIA,
Bruce

--
+-------------------+---------------------------------------------------+
Bruce Bowler | A person is never happy except at the price of some
1.207.633.9600 | ignorance. - Anatole France
bbowler@xxxxxxxxxxx |
+-------------------+---------------------------------------------------+

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