Chris@19: #!/usr/bin/perl -w
Chris@19: # Generate Fortran 2003 wrappers (which translate MPI_Comm from f2c) from
Chris@19: # function declarations of the form (one per line):
Chris@19: #     extern <type> fftw_mpi_<name>(...args...)
Chris@19: #     extern <type> fftw_mpi_<name>(...args...)
Chris@19: #     ...
Chris@19: # with no line breaks within a given function.  (It's too much work to
Chris@19: # write a general parser, since we just have to handle FFTW's header files.)
Chris@19: # Each declaration has at least one MPI_Comm argument.
Chris@19: 
Chris@19: sub canonicalize_type {
Chris@19:     my($type);
Chris@19:     ($type) = @_;
Chris@19:     $type =~ s/ +/ /g;
Chris@19:     $type =~ s/^ //;
Chris@19:     $type =~ s/ $//;
Chris@19:     $type =~ s/([^\* ])\*/$1 \*/g;
Chris@19:     $type =~ s/double/R/;
Chris@19:     $type =~ s/fftw_([A-Za-z0-9_]+)/X(\1)/;
Chris@19:     return $type;
Chris@19: }
Chris@19: 
Chris@19: while (<>) {
Chris@19:     next if /^ *$/;
Chris@19:     if (/^ *extern +([a-zA-Z_0-9 ]+[ \*]) *fftw_mpi_([a-zA-Z_0-9]+) *\((.*)\) *$/) {
Chris@19: 	$ret = &canonicalize_type($1);
Chris@19: 	$name = $2;
Chris@19: 
Chris@19: 	$args = $3;
Chris@19: 
Chris@19: 	
Chris@19: 	print "\n$ret XM(${name}_f03)(";
Chris@19: 
Chris@19: 	$comma = "";
Chris@19: 	foreach $arg (split(/ *, */, $args)) {
Chris@19:             $arg =~ /^([a-zA-Z_0-9 ]+[ \*]) *([a-zA-Z_0-9]+) *$/;
Chris@19:             $argtype = &canonicalize_type($1);
Chris@19:             $argname = $2;
Chris@19: 	    print $comma;
Chris@19: 	    if ($argtype eq "MPI_Comm") {
Chris@19: 		print "MPI_Fint f_$argname";
Chris@19: 	    }
Chris@19: 	    else {
Chris@19: 		print "$argtype $argname";
Chris@19: 	    }
Chris@19: 	    $comma = ", ";
Chris@19:         }
Chris@19: 	print ")\n{\n";
Chris@19: 
Chris@19: 	print "     MPI_Comm ";
Chris@19: 	$comma = "";
Chris@19: 	foreach $arg (split(/ *, */, $args)) {
Chris@19:             $arg =~ /^([a-zA-Z_0-9 ]+[ \*]) *([a-zA-Z_0-9]+) *$/;
Chris@19:             $argtype = &canonicalize_type($1);
Chris@19:             $argname = $2;
Chris@19: 	    if ($argtype eq "MPI_Comm") {
Chris@19: 		print "$comma$argname";
Chris@19: 		$comma = ", ";
Chris@19: 	    }
Chris@19:         }
Chris@19: 	print ";\n\n";
Chris@19: 
Chris@19: 	foreach $arg (split(/ *, */, $args)) {
Chris@19:             $arg =~ /^([a-zA-Z_0-9 ]+[ \*]) *([a-zA-Z_0-9]+) *$/;
Chris@19:             $argtype = &canonicalize_type($1);
Chris@19:             $argname = $2;
Chris@19:             if ($argtype eq "MPI_Comm") {
Chris@19:                 print "     $argname = MPI_Comm_f2c(f_$argname);\n";
Chris@19:             }
Chris@19:         }
Chris@19: 
Chris@19: 	$argnames = $args;
Chris@19: 	$argnames =~ s/([a-zA-Z_0-9 ]+[ \*]) *([a-zA-Z_0-9]+) */$2/g;
Chris@19: 	print "     ";
Chris@19: 	print "return " if ($ret ne "void");
Chris@19: 	print "XM($name)($argnames);\n}\n";
Chris@19:     }
Chris@19: }