#!/usr/bin/env perl

#*******************************************************************************
# ALMA - Atacama Large Millimeter Array
# Copyright (c) ESO - European Southern Observatory, 2014
# (in the framework of the ALMA collaboration).
# All rights reserved.
# 
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# 
# This library 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
# Lesser General Public License for more details.
# 
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
#*******************************************************************************

#************************************************************************
#   NAME 
#   JacPrep 
# 
#   SYNOPSIS
#   JacPrep input_file.idl [idl_paths and options] 
# 
#   DESCRIPTION
#   JacPrep preprocesses a .idl file expanding macros and preserving
#   all the lines starting with #include and #pragma.
#   The output(standard) is in a suitable format to be processed by JacORB.
#   After the name of the input file, pass cpp options like, typically,
#   IDL path and define arguments as one single parameter string.
#
#   AUTHOR
#   Michele Zamparelli, Moreno Pasquato
#
#   FILES
#   ACS/kit/acs/src/JacPrep
#
#   ENVIRONMENT
#
#   RETURN VALUES
#
#   CAUTIONS
#
#   EXAMPLES
#   JacPrep alpha.idl "-I/alma/ACS-2.0/ACSSW/idl"
#   JacPrep ../idl/tdemTOPICS.midl " -I/alma/ACS-8.0/JacORB/idl/jacorb -DDDS_USE -DDDS_USE_OPENDDS"
#
#   SEE ALSO
#
#   BUGS     
#
#------------------------------------------------------------------------

$rcsId = '$Id: JacPrep,v 1.13 2010/01/04 15:34:48 gchiozzi Exp $';

# Check for idl file argument
die "supply an IDL filename \n" if ($#ARGV < 0);

# Variable setting
$inputFile = $ARGV[0];
$CPP_OPTIONS = $ARGV[1];

$namespace = $ARGV[0];
$namespace =~ 	s/.*\///g;
$namespace =~ 	s/[\.-]/_/g;

# File type verification
warn "filename does not end with .idl nor .midl\n" unless ( $inputFile =~ /\.idl$/ || $inputFile =~ /\.midl$/);

# File existence/permission verification
die "File $inputFile not found or not readable\n" if ( ! -f $inputFile || ! -r $inputFile);
chop($dirname = `dirname $inputFile`);

# File Parsing:
# all the lines starting with #include  
# and/or #pragma are stored in a temporary array
open(rfd, "$inputFile");
foreach (grep (/^#/, <rfd>) ) {  
   
    # Looking for patterns: #include or #prefix
    if (/^#include/  ) { 
       push(@newFile,$_);
    }
}
close(rfd);

# File preprocessed using cpp and output stored in array @lines 
open( nfd, "cpp $CPP_OPTIONS -E $inputFile |");
	 if ($?) { 
	     die "JacPrep: failed to cpp $INCLUDE_PATH -E $inputFile\n";
	 }
@lines = <nfd>;

# Preprocessed file parsing
foreach $line (@lines) { 

    if ( $line =~ /^#/) {  ##
	 if  ($line !~ /^#pragma/ ) {   ##
	      # we assume it's an include
	      # The line starting with # contain the name of the input file
	      # This output part requires to be stored
	      if ($line =~ /\"$inputFile\"/  ) { #"
		  $record = 1;
		  next;
	      } else { 
		  $record = 0;     
	      }
	  }
     }
    if ( $record) {
        # Output stored in array @newFile 
	$line=~ s/};/};\n/g;
	push(@newFile, $line);
    }
}
	 
	 
close(nfd);
	 
print "/". "*" x 79;
print "* $rcsId\n";
print "* DO NOT EDIT\n";
print "* Automatically generated from $inputFile\n";
print "* on ".localtime()."\n";	 
print "*" x 79 . "/\n";

# guard condition
print "#ifndef _$namespace\_\n";
print "#define _$namespace\_\n";

# preprocessing marker define
print "#ifndef _ACS_PREPROCESSED\_\n";
print "#define _ACS_PREPROCESSED\_\n";
print "#endif\n";

# Sending to standard output the preprocessed file    
foreach(@newFile) { 
     print;
}
print "#endif\n";