44 lines
1.4 KiB
Bash
Executable file
44 lines
1.4 KiB
Bash
Executable file
#! /bin/sh
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# Script to generate Fortran 2003 interface declarations for FFTW's MPI
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# interface from the fftw3-mpi.h header file.
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# This is designed so that the Fortran caller can do:
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# use, intrinsic :: iso_c_binding
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# implicit none
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# include 'fftw3-mpi.f03'
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# and then call the C FFTW MPI functions directly, with type checking.
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#
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# One caveat: because there is no standard way to conver MPI_Comm objects
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# from Fortran (= integer) to C (= opaque type), the Fortran interface
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# technically calls C wrapper functions (also auto-generated) which
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# call MPI_Comm_f2c to convert the communicators as needed.
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echo "! Generated automatically. DO NOT EDIT!"
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echo
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echo " include 'fftw3.f03'"
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echo
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# Extract constants
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perl -pe 's/#define +([A-Z0-9_]+) +\(([+-]?[0-9]+)U?\)/\n integer\(C_INTPTR_T\), parameter :: \1 = \2\n/g' < fftw3-mpi.h | grep 'integer(C_INTPTR_T)'
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perl -pe 'if (/#define +([A-Z0-9_]+) +\(([0-9]+)U? *<< *([0-9]+)\)/) { print "\n integer\(C_INT\), parameter :: $1 = ",$2 << $3,"\n"; }' < fftw3-mpi.h | grep 'integer(C_INT)'
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# Extract function declarations
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for p in $*; do
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if test "$p" = "d"; then p=""; fi
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echo
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cat <<EOF
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type, bind(C) :: fftw${p}_mpi_ddim
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integer(C_INTPTR_T) n, ib, ob
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end type fftw${p}_mpi_ddim
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EOF
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echo
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echo " interface"
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grep -v 'mpi.h' fftw3-mpi.h | gcc -I../api -D__GNUC__=5 -D__i386__ -E - |grep "fftw${p}_mpi_init" |tr ';' '\n' | perl ../api/genf03.pl
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echo " end interface"
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done
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