Reference: fortran_types.h

Overview

fortran_types.h defines the following typedefs to provide the C equivalent to a Fortran intrinsic type:

ftn_int_t

is a Fortran INTEGER value

ftn_real_t

is a Fortran REAL value

ftn_cmplx_t

is a structure ({ftn_real_t real, imag;}) representing a Fortran COMPLEX value

ftn_double_t

is a Fortran DOUBLE PRECISION value

ftn_dcmplx_t

is a structure ({ftn_double_t real, imag;}) representing a Fortran DOUBLE COMPLEX value

ftn_char_t

is a Fortran CHARACTER

ftn_logical_t

is a Fortran LOGICAL

The typedef, ftn_length_t, is defined to represent the type used for the hidden length arguments which are passed when character arrays are passed as arguments to a function or are returned by a function.

The macro function, FTN_IS_FALSE(x), is defined to convert a Fortran logical value into true or false as represented in C.

If ive_fortran.h is included, there is no need to include fortran_types.h since all of the above are provided in ive_fortran.h as well.

Bugs

The current implementation of fortran_types.h expects a number of preprocessor macros to be set which explicitly set what the types are. It should be modified to expects a preprocessor macro to be set to describe the target C and Fortran environment and then determines the equivalent types automatically.

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modified June 22, 2001