comparison src/fftw-3.3.3/mpi/f03api.sh @ 10:37bf6b4a2645

Add FFTW3

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