#!/usr/bin/perl

#======================================================================

#                    E D I T P D 0 

#                    doc: Mon Nov 25 20:24:31 2013

#                    dlm: Tue Nov 26 10:31:05 2013

#                    (c) 2013 A.M. Thurnherr

#                    uE-Info: 70 1 NIL 0 0 72 2 2 4 NIL ofnI

#======================================================================

# edit RDI PD0 file, e.g. to replace pitch/roll/heading with external values

# HISTORY:

#	Nov 25, 2013: - created

$0 =~ m{(.*)/[^/]+}; 

require "$1/RDI_PD0_IO.pl";

require "getopts.pl";

$USAGE = "$0 @ARGV";

die("Usage: $0 " .

	'-e) <edit-file> ' .

	"<input file> <output file>\n")

		unless (&Getopts('e:') && @ARGV == 2);

die("$0: -e <edit-file> is required\n")

	unless (-r $opt_e);

print(STDERR "Reading $ARGV[0]...");				# read data

readData($ARGV[0],\%dta);

print(STDERR "done\n");

#----------------------------------------------------------------------

print(STDERR "Editing according to <$opt_e>...");

#--------------------------------------------------

# INTERFACE

#	- example <edit_file> entry:

#		162     p(3), r(4), h(3.14)

#--------------------------------------------------

sub p($) { $dta{ENSEMBLE}[$e]->{PITCH} = $_[0]; }

sub r($) { $dta{ENSEMBLE}[$e]->{ROLL} = $_[0]; }

sub h($) { $dta{ENSEMBLE}[$e]->{HEADING} = $_[0]; }

#--------------------------------------------------

# Main Routine

#--------------------------------------------------

open(EF,$opt_e) || die("$opt_e: $!\n");

while (<EF>) {

	s/\#.*//;

	next if m/^\s+$/;

	my($ens,$expr) = m/^\s*(\d+)\s+(.*)$/;

	my($id) = ($expr =~ m/^([A-Z]+)\s/);							# e.g. PITCH, ROLL, HEADING

	$expr = sprintf('$dta{ENSEMBLE}[$e]->{%s}',$id)

		if defined($id);

	push(@EE,$ens);

	push(@EX,$expr);

}

close(EF);

for (local($e)=my($eei)=0; $e<@{$dta{ENSEMBLE}}; $e++) {			# local() needed for p(), r(), h()

	if ($EE[$eei] == $dta{ENSEMBLE}[$e]->{NUMBER}) {				# match => edit

#		print(STDERR "\n\@ens=$EE[$eei]: $EX[$eei]");

#		print(STDERR "\n\tp($dta{ENSEMBLE}[$e]->{PITCH}), r($dta{ENSEMBLE}[$e]->{ROLL}), h($dta{ENSEMBLE}[$e]->{HEADING})");

		eval($EX[$eei]) || die("$@ while executing <$EX[$eei]>\n");

#		print(STDERR "\n\tp($dta{ENSEMBLE}[$e]->{PITCH}), r($dta{ENSEMBLE}[$e]->{ROLL}), h($dta{ENSEMBLE}[$e]->{HEADING})...");

	} elsif ($EE[$eei] > $dta{ENSEMBLE}[$e]->{NUMBER}) {			# next edit later in file => skip

		next;

	} else {														# need next edit

		$eei++;

		last if ($eei >= @EE);

		redo;

	}

}

print(STDERR "done\n");

#----------------------------------------------------------------------

print(STDERR "Writing $ARGV[1]...");				# write data

writeData($ARGV[1],\%dta);

print(STDERR "done\n");

exit(0);