#! /usr/bin/perl -s
#/*@@
#  @file      CST
#  @date      Sep 1998
#  @author    Tom Goodale
#  @desc 
#  Parses the the configuration files for thorns.
#  @enddesc 
#  @version $Header: /mnt/data2/cvs2svn/cvs-repositories/Cactus/lib/sbin/CST,v 1.36 2000-01-21 10:13:09 allen Exp $
#@@*/

# Global parameter to track the number of errors from the CST
# The file make.thornlist is only created if the number of errors
# is zero.

$CST_errors = 0;
$error_string = "";

##########################################################################
# Parse the command line

$activethorns = shift(@ARGV);

if (! $activethorns) 
{
    printf "Usage: CST [-top=<TOP>] [-config_dir=<config directory>] [-cctk_home=<CCTK home dir>] -bindings_dir=<CCTK bindings directory> ActiveThornList";
    exit;
}


if(! $top)
{
  $top = `pwd`;
}

if(! $config_dir)
{
  $config_dir = "$top/config-data";
}

# Set up the CCTK home directory
if(! $cctk_home)
{
  $cctk_home = $ENV{'CCTK_HOME'} || "$ENV{HOME}/CCTK";
  $cctk_home =~ s:/$::g;
}

if(! $bindings_dir)
{
  $bindings_dir = "$top/bindings";
}


########################################################################
# Require certain arrangements


$sbin_dir = "$cctk_home/lib/sbin";

if (!-e "$sbin_dir/parameter_parser.pl" ) 
{
  die "Unable to find CCTK sbin directory - tried $sbin_dir\n";
}

require "$sbin_dir/parameter_parser.pl";
require "$sbin_dir/interface_parser.pl";
require "$sbin_dir/ScheduleParser.pl";
require "$sbin_dir/create_c_stuff.pl";
require "$sbin_dir/create_fortran_stuff.pl";
require "$sbin_dir/GridFuncStuff.pl";
require "$sbin_dir/output_config.pl";
require "$sbin_dir/ImpParamConsistency.pl";
require "$sbin_dir/CSTUtils.pl";
require "$sbin_dir/CreateParameterBindings.pl";
require "$sbin_dir/CreateImplementationBindings.pl";
require "$sbin_dir/CreateScheduleBindings.pl";
require "$sbin_dir/BuildHeaders.pl";

#######################################################################
#
#                     Main Program
#
######################################################################

# Find out which thorns we have and the location of the ccl files.
print "Reading ThornList...\n";
%thorns = &CreateThornList($cctk_home, $activethorns);

# Parse the interface.ccl files
print "Parsing interface files...\n";
%interface_database = &create_interface_database(%thorns);

#$debug_interface = 1;
if($debug_interface)
{
  &print_interface_database(%interface_database);
}

# Parse the parameter.ccl files
print "Parsing parameter files...\n";
%parameter_database = &create_parameter_database(%thorns);

# Parse the schedule.ccl files
print "Parsing schedule files...\n";
%schedule_database = &create_schedule_database(%thorns);

print "Checking consistency...\n";
%parameter_database = &CheckImpParamConsistency(scalar(keys %interface_database), %interface_database, %parameter_database);

if($debug_parameters)
{
  &print_parameter_database(%parameter_database);
}

#$debug_interface = 1;
if($debug_interface)
{
  &print_interface_database(%interface_database);
}

#$debug_schedule = 1;
if($debug_schedule)
{
  &print_schedule_database(%schedule_database);
}

# Create all the bindings
print "Creating Thorn-Flesh bindings...\n";
&CreateBindings($bindings_dir, \%parameter_database, \%interface_database, \%schedule_database);

# Create header file of active thorns for the code
@activethornsheader = &CreateActiveThornsHeader(%thorns);
&OutputFile("$bindings_dir/include/", "thornlist.h", @activethornsheader);

# Create define file of active thorns
@definethornsheader = &CreateDefineThornsHeader(%thorns);
&OutputFile("$bindings_dir/include/", "cctk_DefineThorn.h", @definethornsheader);

# Create define file for this thorn
@definethisthornheader = &CreateDefineThisThornHeader(%thorns);
&OutputFile("$bindings_dir/include/", "definethisthorn.h", @definethisthornheader);

# Create the header files used by the thorns
&BuildHeaders($cctk_home,$bindings_dir,%interface_database);

# Finally (must be last), create the make.thornlist file.
@make_thornlist = &CreateMakeThornlist(%thorns);

# Stop the make process if there were any errors
if ($CST_errors)
{
    if ($CST_errors == 1) 
    {
      $comment1 = "was 1 error";
      $comment2 = "This";
    }
    else 
    {
      $comment1 = "were $CST_errors errors";
      $comment2 = "These";
    }
    print "\n\n------------------------------------------------------\n";
    print "There $comment1 during execution of the CST\n";
    print "$comment2 must be corrected before compilation can proceed\n";
    print "------------------------------------------------------\n\n";
    &CST_PrintErrors;
    exit(1);
}

&OutputFile($config_dir, "make.thornlist", @make_thornlist);

print "CST finished.\n";
exit;


#############################################################################
#
#                      Subroutines
#
#############################################################################

#/*@@
#  @routine    CreateThornList
#  @date       Thu Jan 28 15:18:45 1999
#  @author     Tom Goodale
#  @desc 
#  Parses the ActiveThorns file and extracts the thorn names.
#  @enddesc 
#  @calls     
#  @calledby   
#  @history 
#
#  @endhistory 
#
#@@*/

sub CreateThornList
{
  my($cctk_home, $activethorns) = @_;
  my(%thornlist);
  my($thorn, $package, $thorn_name);

  open(ACTIVE, "<$activethorns") || die "Cannot open ActiveThorns file $activethorns !";

  # Put a reference to the main cctk sources in.
  $thornlist{"Cactus"} = "$cctk_home/src";

#  print "cctk_home is $cctk_home\n";

  # Loop through the lines of the file.
  while(<ACTIVE>)
  {
    #Ignore comments.
    s/\#(.*)$//g;

    s/\n//g;		# Different from chop...

    #Ignore blank lines
    next if (m:^\s*$:);

    foreach $thorn (split(' '))
    {
      $thorn =~ m:(.*)[/\\](.*):;

      $package = $1;
      $thorn_name = $2;
      # No longer strip thorn_ off the beginning of a thorn name.
      #      $thorn_name =~ s/thorn_//;

      if( -d "$cctk_home/arrangements/$thorn")
      {      
        if( -r "$cctk_home/arrangements/$thorn/param.ccl" &&
	    -r "$cctk_home/arrangements/$thorn/interface.ccl" &&
	    -r "$cctk_home/arrangements/$thorn/schedule.ccl")
	{ 
	  if( $thornlist{"$thorn_name"} )
	  {
	    $message = "Duplicate thorn $thorn_name";
            &CST_error(0,$message,__LINE__,__FILE__);
	  }
	  else
	  {
	    $thornlist{"$thorn_name"} = "$cctk_home/arrangements/$thorn";
	  }
        }
	else
	{
	  $message = "$thorn - missing ccl file(s)\n";
	  &CST_error(0,$message,__LINE__,__FILE__);
	  next;
        }
      }
      else
      {
	 $message = "Missing thorn $thorn\n";
         &CST_error(0,$message,__LINE__,__FILE__);
      }
    }
  }
  close ACTIVE;

  return %thornlist;
}



#/*@@
#  @routine    get_global_parameters
#  @date       Thu Jan 28 15:21:52 1999
#  @author     Tom Goodale
#  @desc 
#  Gets a list of all global parameters and the thorns they are in.
#  @enddesc 
#  @calls     
#  @calledby   
#  @history 
#
#  @endhistory 
#
#@@*/

sub get_global_parameters
{
  my($rhparameter_db) = @_;
  my(%global_parameters);
  my($param);

  foreach $param (split(/ /,$rhparameter_db->{"GLOBAL PARAMETERS"}))
  {
    if($param =~ m/(.*)::(.*)/)
    {
      $global_parameters{"$2"} = $1;
    }
  }

  return %global_parameters;
}

    

#/*@@
#  @routine    CreateMakeThornlist
#  @date       Thu Jan 28 15:22:31 1999
#  @author     Tom Goodale
#  @desc 
#  Creates the lines which should be placed in the make.thornlist file.
#  @enddesc 
#  @calls     
#  @calledby   
#  @history 
#
#  @endhistory 
#
#@@*/

sub CreateMakeThornlist
{
  my(%thorns) = @_;
  my($thorn);
  my($thornlist);

  $thornlist = "THORNS =";
  foreach $thorn (keys %thorns)
  {
    # Ignore the main sources - they are dealt with separately
    next if ($thorn =~ m:Cactus:);

    $thorns{$thorn} =~ m:(.*)/(.*)/(.*):;

    # Only place package_name/thorn_name in the file.
    $thornlist .= " $2/$3";
  }

  return ("$thornlist", "");
}

#/*@@
#  @routine    CreateActiveThornsHeader
#  @date       Wed Feb 17 16:06:20 1999
#  @author     Gabrielle Allen
#  @desc 
#  Creates the lines which should be placed in the thornlist.h
#  @enddesc 
#  @calls     
#  @calledby   
#  @history 
#
#  @endhistory 
#
#@@*/

sub CreateActiveThornsHeader
{
  my(%thorns) = @_;
  my($header,$thorn,$nthorns);

  $nthorns = 0;

  $header = "\/* List of active thorns in the code. *\/\n\n";
  $header .= "static char *thorn_name[] = {\n";

  foreach $thorn (keys %thorns)
  {
    # Ignore the main sources - they may confuse
    next if ($thorn =~ m:Cactus:);

    $thorns{$thorn} =~ m:(.*)/(.*)/(.*):;
    $nthorns++;

    # Only place package_name/thorn_name in the file.
    $header .= "\"$2/$3\",\n"; 
  }

  $header .= "\"\"};\n\n";
  $header .= "static int nthorns = $nthorns;\n\n";

  return ("$header", ""); 
}


#/*@@
#  @routine    CreateDefineThornsHeader
#  @date       Wed April 6 16:06:20 1999
#  @author     Gabrielle Allen
#  @desc 
#  Creates the lines which should be placed in the definethorn.h
#  which contains a #define <THORNNAME> for each thorn.
#  @enddesc 
#  @calls     
#  @calledby   
#  @history 
#
#  @endhistory 
#
#@@*/

sub CreateDefineThornsHeader
{
  my(%thorns) = @_;
  my($header,$thorn,$nthorns);

  $nthorns = 0;

  $header = "\/* Defines for active thorns in the code. *\/\n\n";

  foreach $thorn (keys %thorns)
  {
    # Ignore the main sources - they may confuse
    next if ($thorn =~ m:Cactus:);

    $thorns{$thorn} =~ m:(.*)/(.*)/(.*):;
    $nthorns++;

    # Only place package_name/thorn_name in the file.
    $header .= "#define \U$2"."_"."\U$3\E\n"; 
  }

  return ("$header", ""); 
}


#/*@@
#  @routine    CreateDefineThisThornHeader
#  @date       Thu April 22nd 1999
#  @author     Gabrielle Allen
#  @desc 
#  Creates the lines which should be placed in the definethisthorn.h
#  which contains a #define CCTK_THORN <THORNNAME> and a 
#  #define CCTK_ARRANGEMENT <ARRANGEMENTNAME> for each thorn.
#  @enddesc 
#  @calls     
#  @calledby   
#  @history 
#
#  @endhistory 
#
#@@*/

sub CreateDefineThisThornHeader
{
  my(%thorns) = @_;
  my($header,$thorn,$nthorns);

  $nthorns = 0;

  $header = "\/* Defines for thorn this file is part of *\/\n\n";

  foreach $thorn (keys %thorns)
  {
    $thorns{$thorn} =~ m:(.*)/(.*)/(.*):;
    $nthorns++;

    # Only place package_name/thorn_name in the file.
    $header .= "#ifdef THORN_IS_$thorn\n";
    $header .= "#define CCTK_THORN   $3\n"; 
    $header .= "#define CCTK_THORNSTRING \"$3\"\n";
    $header .= "#define CCTK_ARRANGEMENT $2\n";
    $header .= "#define CCTK_ARRANGEMENTSTRING \"$2\"\n";
    $header .= "#endif\n\n";
  }

  return ("$header", ""); 
}


#/*@@
#  @routine    CreateBindings
#  @date       Thu Jan 28 15:24:53 1999
#  @author     Tom Goodale
#  @desc 
#  All the perl generated stuff is finally placed into the bindings 'thorn'.
#  @enddesc 
#  @calls     
#  @calledby   
#  @history 
#
#  @endhistory 
#
#@@*/

sub CreateBindings
{
  my($bindings_dir, $rhparameter_db, $rhinterface_db, $rhschedule_db) = @_;
  my($start_dir);

  # Create the bindings directory if it doesn't exist.
  if(! -d $bindings_dir)
  {
    mkdir("$bindings_dir", 0755) || die "Unable to create $bindings_dir";
  }

  # Remember where we started.
  $start_dir = `pwd`;

  # Create the bindings for the subsystems.
  print "   Creating implementation bindings...\n";
  &CreateImplementationBindings($bindings_dir, $rhparameter_db, $rhinterface_db);
  print "   Creating parameter bindings...\n";
  &CreateParameterBindings($bindings_dir, $rhparameter_db, $rhinterface_db);
  print "   Creating variable bindings...\n";
  &CreateVariableBindings($bindings_dir, $rhinterface_db);
  print "   Creating schedule bindings...\n";
  &CreateScheduleBindings($bindings_dir, $rhinterface_db, $rhschedule_db);

  # Place an appropriate make.code.defn in the bindings directory.
  chdir $bindings_dir;

  $dataout  = "SRCS = \n";
  $dataout .= "SUBDIRS = Implementations Parameters Variables Schedule\n";
  &WriteFile("make.code.defn",\$dataout);
    
  # Go back to where we started.
  chdir $start_dir;
  
}