cannam@127: #!/usr/bin/perl -w
cannam@127: # Generate Fortran 2003 wrappers (which translate MPI_Comm from f2c) from
cannam@127: # function declarations of the form (one per line):
cannam@127: #     extern <type> fftw_mpi_<name>(...args...)
cannam@127: #     extern <type> fftw_mpi_<name>(...args...)
cannam@127: #     ...
cannam@127: # with no line breaks within a given function.  (It's too much work to
cannam@127: # write a general parser, since we just have to handle FFTW's header files.)
cannam@127: # Each declaration has at least one MPI_Comm argument.
cannam@127: 
cannam@127: sub canonicalize_type {
cannam@127:     my($type);
cannam@127:     ($type) = @_;
cannam@127:     $type =~ s/ +/ /g;
cannam@127:     $type =~ s/^ //;
cannam@127:     $type =~ s/ $//;
cannam@127:     $type =~ s/([^\* ])\*/$1 \*/g;
cannam@127:     $type =~ s/double/R/;
cannam@127:     $type =~ s/fftw_([A-Za-z0-9_]+)/X(\1)/;
cannam@127:     return $type;
cannam@127: }
cannam@127: 
cannam@127: while (<>) {
cannam@127:     next if /^ *$/;
cannam@127:     if (/^ *extern +([a-zA-Z_0-9 ]+[ \*]) *fftw_mpi_([a-zA-Z_0-9]+) *\((.*)\) *$/) {
cannam@127: 	$ret = &canonicalize_type($1);
cannam@127: 	$name = $2;
cannam@127: 
cannam@127: 	$args = $3;
cannam@127: 
cannam@127: 	
cannam@127: 	print "\n$ret XM(${name}_f03)(";
cannam@127: 
cannam@127: 	$comma = "";
cannam@127: 	foreach $arg (split(/ *, */, $args)) {
cannam@127:             $arg =~ /^([a-zA-Z_0-9 ]+[ \*]) *([a-zA-Z_0-9]+) *$/;
cannam@127:             $argtype = &canonicalize_type($1);
cannam@127:             $argname = $2;
cannam@127: 	    print $comma;
cannam@127: 	    if ($argtype eq "MPI_Comm") {
cannam@127: 		print "MPI_Fint f_$argname";
cannam@127: 	    }
cannam@127: 	    else {
cannam@127: 		print "$argtype $argname";
cannam@127: 	    }
cannam@127: 	    $comma = ", ";
cannam@127:         }
cannam@127: 	print ")\n{\n";
cannam@127: 
cannam@127: 	print "     MPI_Comm ";
cannam@127: 	$comma = "";
cannam@127: 	foreach $arg (split(/ *, */, $args)) {
cannam@127:             $arg =~ /^([a-zA-Z_0-9 ]+[ \*]) *([a-zA-Z_0-9]+) *$/;
cannam@127:             $argtype = &canonicalize_type($1);
cannam@127:             $argname = $2;
cannam@127: 	    if ($argtype eq "MPI_Comm") {
cannam@127: 		print "$comma$argname";
cannam@127: 		$comma = ", ";
cannam@127: 	    }
cannam@127:         }
cannam@127: 	print ";\n\n";
cannam@127: 
cannam@127: 	foreach $arg (split(/ *, */, $args)) {
cannam@127:             $arg =~ /^([a-zA-Z_0-9 ]+[ \*]) *([a-zA-Z_0-9]+) *$/;
cannam@127:             $argtype = &canonicalize_type($1);
cannam@127:             $argname = $2;
cannam@127:             if ($argtype eq "MPI_Comm") {
cannam@127:                 print "     $argname = MPI_Comm_f2c(f_$argname);\n";
cannam@127:             }
cannam@127:         }
cannam@127: 
cannam@127: 	$argnames = $args;
cannam@127: 	$argnames =~ s/([a-zA-Z_0-9 ]+[ \*]) *([a-zA-Z_0-9]+) */$2/g;
cannam@127: 	print "     ";
cannam@127: 	print "return " if ($ret ne "void");
cannam@127: 	print "XM($name)($argnames);\n}\n";
cannam@127:     }
cannam@127: }