#!/usr/bin/perl
#   genspic2gnuplot - Copyright 2004 Ian Jackson - see below
#
# Reads a `genspic' file on stdin.  Takes exactly one arg, <pfx>.
#
# Produces various output files:
#  <pfx>.gnuplots.sh                     run this to display results
#  <pfx>,<Kind><N>.gnuplot-cmd           gnuplot script for displaying:
#  <pfx>,<Kind><N>-<M>.gnuplot-data      gnuplot-format input data
#  <pfx>,gnuplot-fifo                    working fifo for .gnuplots.sh
# where
#  <Kind> is Freq or Time (according to the type of analysis)
#  <N>    is the count, starting at 0, of which report this is from gnucap
#  <M>    is the individual column of Y data
#
# Limitations
#
#  There's no easy way to mess with the gnuplot settings.
#
#  This whole scheme is very clumsy.  There should be a driver program
#  with command-line option parsing.

# This program and its documentation are free software; you can
# redistribute them and/or modify them under the terms of the GNU
# General Public License as published by the Free Software Foundation;
# either version 3, or (at your option) any later version.
# 
# This program and its documentation are distributed in the hope that
# they 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, consult the Free Software Foundation's
# website at www.fsf.org, or the GNU Project website at www.gnu.org.

die unless @ARGV==1;
die if $ARGV[0] =~ m/^\-/;

($ofb)= @ARGV;
$sof= "$ofb.gnuplots.sh";
open A, "> $sof" or die $!;
system 'chmod','+x',"$sof"; $? and die $?;
print A <<END
#!/bin/sh
set -e
fi=$ofb,gnuplot-fifo
rm -f \$fi
mkfifo -m 600 \$fi
END
    or die $!;

for (;;) {
    ($c,@s)= split /\s+/, <STDIN>;
    if ($c eq 'S') {
	($cplot,$logxy,@columns) = @s;
	$cplot .= $counter{$cplot}++;
	unshift @columns, 'x:';
	@mmm= map { s/^(\w+)\:// or die; $1; } @columns;
	open S, "> $ofb,$cplot.gnuplot-cmd" or die $!;
	print S <<END
set data style lines
set title '$cplot'
END
        or die $!;
	print S "set logscale xy\n" or die $! if $logxy;
	print S "set y2tics autofreq\n" or die $! if grep { $_ eq 'y2' } @mmm;
	undef %min;
	undef %max;
	for ($yn=1; $yn<=$#columns; $yn++) {
	    open "O$yn", "> $ofb,$cplot-$yn.gnuplot-data" or die $!;
	}
    } elsif ($c eq 'T') {
	die unless @mmm;
	die if @s;
	foreach $mmm (keys %min) {
	    print S "set ${mmm}range [$min{$mmm}:$max{$mmm}]\n" or die $!;
	}
	$sep= "plot ";
	for ($yn=1; $yn<=$#columns; $yn++) {
	    close "O$yn" or die $!;
	    $mmm[$yn] =~ m/^y2?$/ or die "$mmm[$yn]";
	    $axes= $mmm[$yn]; $axes =~ s/^y$/y1/;
	    $yoff= 1-$yn;
	    print S "$sep\\\n".
		" '$ofb,$cplot-$yn.gnuplot-data'".
		    " axes x1$axes title '$columns[$yn]'"
			or die $!;
	    $sep= ',';
	}
	print S "\n\npause -1\n" or die $!;
	close S or die $!;
	print A "  gnuplot $ofb,$cplot.gnuplot-cmd <\$fi &\n" or die $!;
	@mmm=@columns=();
    } elsif ($c eq 'D') {
	die unless @mmm;
	@numbers= @s;
	die unless @numbers == @columns;
	for ($yn=0; $yn<=$#columns; $yn++) {
	    $_= $numbers[$yn];
	    $mmm= $mmm[$yn];
	    $min{$mmm}= $_ unless exists($min{$mmm}) && $min{$mmm} <= $_;
	    $max{$mmm}= $_ unless exists($max{$mmm}) && $max{$mmm} >= $_;
	    if ($yn) {
		printf {"O$yn"} "%s %s\n", $numbers[0], $_
		    or die $!;
	    }
	}
    } elsif ($c eq 'F') {
	last;
    } else {
	die;
    }
}

print A <<END
exec 3>\$fi
printf 'hit return to quit: '
read
exec 3>&-
END
    or die $!;
close A or die $!;

print ": generated ; $sof\n" or die $!;

# $Id: genspic2gnuplot,v 1.6 2007-09-21 21:21:15 ianmdlvl Exp $