fortran - Parameter encoding in gfortran module files -


let's have module:

module testparam      real, parameter :: x=1.0, xx=10.0     real, parameter :: pi=3.14  end module testparam

compile with

gfortran -c testparam.f90

and in generated module file

cp testparam.mod testparam.gz gunzip testparam.gz

the trimmed output is:

(2 'pi' 'testparam' '' 1 ((parameter unknown-intent unknown-proc unknown implicit-save 0 0) () (real 4 0 0 0 real ()) 0 0 () (constant (real 4 0 0 0 real ()) 0 '0.323d70c@1') () 0 () () 0 0)  4 'x' 'testparam' '' 1 ((parameter unknown-intent unknown-proc unknown implicit-save 0 0) () (real 4 0 0 0 real ()) 0 0 () (constant (real 4 0 0 0 real ()) 0 '0.1000000@1') () 0 () () 0 0)  5 'xx' 'testparam' '' 1 ((parameter unknown-intent unknown-proc unknown implicit-save 0 0) () (real 4 0 0 0 real ()) 0 0 () (constant (real 4 0 0 0 real ()) 0 '0.a000000@1') () 0 () () 0 0)

then can see value of x has been stored '0.1000000@1' , pi has been stored '0.323d70c@1' , xx '0.a000000@1'. how can convert string encoded parameter number?

given value of x term assumed simply, format a@b, a*10^b value pi hex encoded (and xx variable int(0xa)==10.0 @ least part of hex). maybe sort of hex encoded floating point number?

with of @roygvib comment works python

def hextofloat(s):     # given hex parameter '0.12decde@9' returns 5065465344.0     man, exp =s.split('@')     exp=int(exp)     decimal = man.index('.')     man = man[decimal+1:]     man = man.ljust(exp,'0')     man = man[:exp]+'.'+man[exp:]     man = man +'p0'     return float.fromhex(man)

split string value mantisa (0.12decde) , exponent (9), hex number right of decimal place (12decde) , pad enough zeros (12decde00) @ least long exponent, put decimal place in (12decde00.0) put 'p0' (12decde00.p0) on end , pass float.fromhex()


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