#!/usr/local/bin/perl
# The following perl script will convert a directory full with Fortran
# functions, into C and create a Makefile to allow the user to compile it
# like a decent human being.
#
###########################
# CONFIGURE this script:
#
# Where is your f2c executable located?
$f2c_exec = "/hyak/lf/bin/f2c";
#
# Where is your f2c.h header file?
$f2c_header = "/hyak/lf/include/f2c.h";
#
# You are DONE CONFIGURING!
############################
# Copyright (C) 1996  Eleftherios Gkioulekas <lf@amath.washington.edu>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
###############################################################

# Get the name of the directory where all the action takes place
$directory = $ARGV[0];
chdir($directory);

# Get a list of all the Fortran files in there
open(LIST,"ls *.f |") || die "Can't do ls *.f in $directory";
@file_list = <LIST>;
chop(@file_list);
close(LIST);

# Obtain a list of the names without the extension
grep(s/(\w+)\.f/$1/g,@file_list);

#
# Now apply f2c on every one of these files
#
print "Translating files.\n";
$i = 0;
foreach $file (@file_list)
{
 system("$f2c_exec -P ${file}.f");
}

#
# Put together the prototypes
#
print "Making C Prototypes. -> $directory.h \n";
unlink $directory.h;
open(HEADER,">$directory.h") || die "Can't create $directory.h : $!";
print HEADER <<"END";
/*
** ${directory}.h
** Created automagically by dirf2c which was 
** written by his Majesty Mr.Elef
*/

#ifndef __defined_${directory}_h__fortran_calls
#define __defined_${directory}_h__fortran_calls

/* extern "C" escape for C++ programs */

#ifdef __cplusplus
extern "C" {
#endif

/*
***********************************************************************
*/

END

foreach $file (@file_list)
{
 open(FILE,"${file}.P");
 @thefile = <FILE>;
 close(FILE);
 print HEADER @thefile;
 unlink("${file}.P");
 print HEADER <<"END";

/*                    
***********************************************************************
*/ 

END
}
print HEADER <<"END";

/* close the extern "C" escape */
#ifdef __cplusplus
}
#endif

/* close the outer #ifndef */
#endif

/* Enjoy! */
END
close(FILE);

#
# Put together a Makefile
#
print "Making Make script.\n";
unlink "Make";
open(SCRIPT,">Make") || die "Can't create Makefile : $!";
print SCRIPT <<"END";
#!/bin/csh
# This script has been generated by the dirf2c program
# which was written by his Majesty Mr.Elef
#
setenv compiler "gcc -c "
echo "Compiling lib${directory}.a"
rm -f lib${directory}.a
END

# How many files are on the list?
$howmany = $#file_list;
foreach $file (@file_list)
{
 print SCRIPT << "END";
\$compiler $file.c
ar cr lib${directory}.a $file.o
rm -f $file.o
echo "$file.o done. $howmany files to go."
END
 $howmany -= 1;
}
print SCRIPT "ranlib lib${directory}.a\n";
close(SCRIPT);
# Give executable permissions to the Make script
chmod(0755,"Make");

#
# Finally, make sure to install a copy of f2c.h
#
system("cp $f2c_header f2c.h");