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executable file
·2368 lines (1834 loc) · 73.4 KB
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#!/usr/bin/perl
package feedgnuplot; # for the metacpan indexer
use strict;
use warnings;
use Getopt::Long;
use Time::HiRes qw( usleep gettimeofday tv_interval );
use IO::Handle;
use IO::Select;
use List::Util qw( first );
use List::MoreUtils 'any';
use Scalar::Util qw( looks_like_number );
use Text::ParseWords; # for shellwords
use Pod::Usage;
use Time::Piece;
# Makefile.PL assumes this is in ''
my $VERSION = '1.55';
my %options;
interpretCommandline();
# list containing the plot data. Each element is a hashref of parameters.
# $curve->{datastring} is a string of all the data in this curve that can be
# sent directly to gnuplot. $curve->{datastring_meta} is a hashref {domain =>
# ..., offset_start => ...}. offset_start represents a position in the
# datastring where this particular data element begins. As the data is culled
# with --xlen, the offsets are preserved by using $curve->{datastring_offset} to
# represent the offset IN THE ORIGINAL STRING of the current start of the
# datastring
my @curves = ();
# Maps a curve ID to the corresponding curve
my %curveFromID = ();
# Whether any new data has arrived since the last replot
my $haveNewData;
# when the last replot happened
my $last_replot_time = [gettimeofday];
# whether the previous replot was timer based
my $last_replot_is_from_timer = 1;
my $this_replot_is_from_timer;
sub getRangeSize
{
my ($id) = @_;
# I'd like to use //, but I guess some people are still on perl 5.8
return
exists $options{rangesize_hash}{$id} ?
$options{rangesize_hash}{$id} :
$options{rangesize_default};
}
sub interpretCommandline
{
# if I'm using a self-plotting data file with a #! line, then $ARGV[0] will contain ALL of the
# options and $ARGV[1] will contain the data file to plot. In this case I need to split $ARGV[0] so
# that GetOptions() can parse it correctly. On the other hand, if I'm plotting normally (not with
# #!) a file with spaces in the filename, I don't want to split the filename. Hopefully this logic
# takes care of both those cases.
if (exists $ARGV[0] && !-r $ARGV[0])
{
unshift @ARGV, shellwords shift @ARGV;
}
# everything off by default:
# do not stream in the data by default
# point plotting by default.
# no monotonicity checks by default
# normal histograms by default
$options{ maxcurves } = 100;
$options{ histstyle} = 'freq';
# Previously I was using 'legend=s%' and 'curvestyle=s%' for curve addressing. This had cleaner
# syntax, but disregarded the order of the given options. This resulted in arbitrarily ordered
# curves. I thus make parse these into lists, and then also make hashes, for later use
# needed for these to be parsed into an array-ref, these default to []
$options{legend} = [];
$options{curvestyle} = [];
$options{style} = [];
$options{every} = [];
$options{histogram} = [];
$options{x1y2} = [];
$options{x2y1} = [];
$options{x2y2} = [];
$options{extracmds} = [];
$options{set} = [];
$options{unset} = [];
$options{equation} = [];
$options{curvestyleall} = '';
$options{styleall} = '';
$options{with} = '';
$options{rangesize} = [];
$options{tuplesize} = [];
GetOptions(\%options, 'stream:s', 'domain!', 'dataid!', 'vnlog!', '3d!', 'colormap!', 'lines!', 'points!',
'circles', 'legend=s{2}', 'autolegend!', 'xlabel=s', 'x2label=s', 'ylabel=s', 'y2label=s', 'zlabel=s',
'title=s', 'xlen=f',
'xmin=s', 'xmax=s', 'x2min=s', 'x2max=s',
'ymin=f', 'ymax=f', 'y2min=f', 'y2max=f',
'zmin=f', 'zmax=f',
'x2=s@', 'y2=s@', 'x1y2=s@', 'x2y1=s@', 'x2y2=s@',
'style=s{2}', 'curvestyle=s{2}', 'curvestyleall=s', 'styleall=s', 'with=s', 'extracmds=s@', 'set=s@', 'unset=s@',
'every=s{2}', 'everyall=s',
'square!', 'square_xy!', 'square-xy!', 'squarexy!', 'hardcopy=s', 'maxcurves=i', 'monotonic!', 'timefmt=s',
'equation=s@',
'image=s',
'histogram=s@', 'binwidth=f', 'histstyle=s',
'terminal=s',
'rangesize=s{2}', 'rangesizeall=i',
'tuplesize=s{2}', 'tuplesizeall=i',
'extraValuesPerPoint=i', # deprecated and undocumented
'help', 'dump', 'exit', 'version',
'geometry=s') or exit 1;
# handle various cmdline-option errors
if ( $options{help} )
{
pod2usage( -exitval => 0,
-verbose => 1, # synopsis and args
-output => \*STDOUT );
}
if( $options{version} )
{
print "feedgnuplot version $VERSION\n";
exit 0;
}
# --style and --curvestyle are synonyms, as are --styleall and
# --curvestyleall, so fill that in
if( $options{styleall} )
{
if($options{curvestyleall} ) { $options{curvestyleall} .= " $options{styleall}"; }
else { $options{curvestyleall} = $options{styleall}; }
delete $options{styleall};
}
# various square-xy synonyms
$options{'square_xy'} = 1 if $options{'square-xy'} || $options{'squarexy'};
push @{$options{curvestyle}}, @{$options{style}};
delete $options{style};
if( $options{curvestyleall} && $options{with} )
{
print STDERR "--curvestyleall and --with are mutually exclusive. Please just use one.\n";
exit -1;
}
if( $options{with} )
{
$options{curvestyleall} = "with $options{with}";
delete $options{with};
}
if( $options{dataid} && $options{vnlog} )
{
print STDERR "--dataid and --vnlog are mutually exclusive. Please just use one.\n";
exit -1;
}
# expand options that are given as comma-separated lists
for my $listkey (qw(histogram x2 y2 x1y2 x2y1 x2y2))
{
@{$options{$listkey}} = map split('\s*,\s*', $_), @{$options{$listkey}}
if defined $options{$listkey};
}
for my $listkey (qw(curvestyle rangesize tuplesize every))
{
next unless defined $options{$listkey};
my @in = @{$options{$listkey}};
my $N = @in / 2;
my @out;
for my $i (0..$N-1)
{
my $key = $in[2*$i];
my $value = $in[2*$i + 1];
for my $key_new (split('\s*,\s*', $key))
{
push @out, $key_new, $value;
}
}
@{$options{$listkey}} = @out;
}
# handle x2 == x2y1 and y2 == x1y2
push @{$options{x2y1}}, @{$options{x2}} if defined $options{x2};
push @{$options{x1y2}}, @{$options{y2}} if defined $options{y2};
$options{x2} = [];
$options{y2} = [];
# convert all tuplesize business to rangesize
my $domainsize = $options{'3d'} ? 2 : 1;
if (defined $options{tuplesizeall})
{
if (defined $options{rangesizeall} )
{
print STDERR "Only one of --rangesizeall and --tuplesizeall may be given\n";
exit -1;
}
$options{rangesizeall} = $options{tuplesizeall} - $domainsize;
delete $options{tuplesizeall};
}
if (defined $options{tuplesize})
{
$options{rangesize} //= [];
my $N = @{$options{tuplesize}} / 2;
for my $i (0..$N-1)
{
$options{tuplesize}[2*$i + 1] -= $domainsize;
}
push @{$options{rangesize}}, @{$options{tuplesize}};
delete $options{tuplesize};
}
# If we're plotting histograms, then set the default histogram options for
# each histogram curve
#
# Apply this to plain (non-cumulative) histograms
if( !$options{curvestyleall} && $options{histstyle} =~ /freq|fnorm/ )
{
for my $hist_curve(@{$options{histogram}})
{
# If we don't specify any options specifically for this histogram, use
# the defaults: filled boxes with borders
if( !any { $options{curvestyle}[$_*2] eq $hist_curve } 0..(@{$options{curvestyle}}/2 - 1) )
{
push @{$options{curvestyle}}, ($hist_curve, 'with boxes fill solid border lt -1');
}
}
}
# --legend and --curvestyle options are conceptually hashes, but are parsed as
# arrays in order to preserve the ordering. I parse both of these into hashes
# because those are useful to have later. After this I can access individual
# legends with $options{legend_hash}{curveid}
for my $listkey (qw(legend curvestyle rangesize every))
{
$options{"${listkey}_hash"} = {};
my $n = scalar @{$options{$listkey}}/2;
foreach my $idx (0..$n-1)
{
$options{"${listkey}_hash"}{$options{$listkey}[$idx*2]} = $options{$listkey}[$idx*2 + 1];
}
}
if ( defined $options{hardcopy} && defined $options{stream} )
{
print STDERR "--stream doesn't make sense together with --hardcopy\n";
exit -1;
}
if ( defined $options{rangesizeall} && defined $options{extraValuesPerPoint} )
{
print STDERR "Only one of --rangesizeall and --extraValuesPerPoint may be given\n";
exit -1;
}
# I now set up the rangesize to always be
#
# $options{rangesize_hash}{$id} // $options{rangesize_default}
#
# which is available as getRangeSize($id)
if ( $options{rangesizeall} )
{
$options{rangesize_default} = $options{rangesizeall};
}
else
{
$options{rangesize_default} = 1;
$options{rangesize_default} += $options{extraValuesPerPoint} if ($options{extraValuesPerPoint});
$options{rangesize_default}++ if ($options{colormap});
$options{rangesize_default}++ if ($options{circles} );
}
# parse stream option. Allowed only numbers >= 0 or 'trigger'. After this code
# $options{stream} is
# -1 for triggered replotting
# >0 for timed replotting
# undef if not streaming
#
# Note that '0' is not allowed, so !$options{stream} will do the expected
# thing
if(defined $options{stream})
{
# if no streaming period is given, default to 1Hz.
$options{stream} = 1 if $options{stream} eq '';
if( !looks_like_number $options{stream} )
{
if($options{stream} eq 'trigger')
{
$options{stream} = 0;
}
else
{
print STDERR "--stream can only take in values >=0 or 'trigger'\n";
exit -1;
}
}
if ( $options{stream} == 0 )
{
$options{stream} = -1;
}
elsif ( $options{stream} <= 0)
{
print STDERR "--stream can only take in values >=0 or 'trigger'\n";
exit -1;
}
}
if ($options{colormap})
{
# colormap styles all curves with palette. Seems like there should be a way to do this with a
# global setting, but I can't get that to work
$options{curvestyleall} .= ' palette';
}
if ( defined $options{binwidth} && !@{$options{histogram}} )
{
print STDERR "--binwidth doesn't make sense without any histograms\n";
exit -1;
}
if ( $options{'3d'} )
{
if ( !$options{domain} )
{
print STDERR "--3d only makes sense with --domain\n";
exit -1;
}
if ( $options{timefmt} )
{
print STDERR "--3d makes no sense with --timefmt\n";
exit -1;
}
if ( defined $options{x2min} || defined $options{x2max} ||
defined $options{y2min} || defined $options{y2max} ||
@{$options{x1y2}} || @{$options{x2y1}} || @{$options{x2y2}} )
{
print STDERR "--3d does not make sense with --x2... or --y2...\n";
exit -1;
}
if ( defined $options{xlen} )
{
print STDERR "--3d does not make sense with --xlen\n";
exit -1;
}
if ( defined $options{monotonic} )
{
print STDERR "--3d does not make sense with --monotonic\n";
exit -1;
}
if ( @{$options{histogram}} )
{
print STDERR "--3d does not make sense with histograms\n";
exit -1;
}
if ( defined $options{circles} )
{
print STDERR "--3d does not make sense with circles (gnuplot doesn't support this)\n";
exit -1;
}
}
else
{
if ( $options{timefmt} && !$options{domain} && !@{$options{histogram}} )
{
print STDERR "--timefmt makes sense only with --domain or --histogram\n";
exit -1;
}
if(!$options{colormap})
{
if ( defined $options{zmin} || defined $options{zmax} || defined $options{zlabel} )
{
print STDERR "--zmin/zmax/zlabel only makes sense with --3d or --colormap\n";
exit -1;
}
}
if ( defined $options{square_xy} )
{
print STDERR "--square_xy only makes sense with --3d\n";
exit -1;
}
for my $hist_curve(@{$options{histogram}})
{
my $hist_dim = getRangeSize($hist_curve);
if( $hist_dim != 1 )
{
print STDERR "I only support 1D histograms, but curve '$hist_curve' has '$hist_dim'-D data\n";
exit -1;
}
}
}
if(defined $options{xlen} && !$options{stream} )
{
print STDERR "--xlen does not make sense without --stream\n";
exit -1;
}
if($options{stream} && defined $options{xlen} &&
( defined $options{xmin} || defined $options{xmax}) &&
!defined $options{histogram})
{
print STDERR "With --stream and --xlen the X bounds are set, so neither --xmin nor --xmax make sense\n";
exit -1;
}
# --xlen implies an order to the data, so I force monotonicity
$options{monotonic} = 1 if defined $options{xlen};
if( $options{histstyle} !~ /freq|cum|uniq|cnorm|fnorm/ )
{
print STDERR "unknown histstyle. Allowed are 'freq...', 'fnorm...', 'cum...', 'uniq...', 'cnorm...'\n";
exit -1;
}
# deal with timefmt
if ( $options{timefmt} )
{
# I need to compute a regex to match the time field and I need to count how
# many whilespace-separated fields there are.
# strip leading and trailing whitespace
$options{timefmt} =~ s/^\s*//;
$options{timefmt} =~ s/\s*$//;
my $Nfields = () = split /\s+/, $options{timefmt}, -1;
$options{timefmt_Ncols} = $Nfields;
# make sure --xlen is an integer. With a timefmt xlen goes through strptime
# and strftime, and those are integer-only
if( defined $options{xlen} )
{
if( $options{xlen} - int($options{xlen}) )
{
print STDERR "When streaming --xlen MUST be an integer. Rounding up to the nearest second\n";
$options{xlen} = 1 + int($options{xlen});
}
}
}
# deal with --image. I just fill in --equation, and reverse the y extents if
# none are explicitly given
if( defined $options{image} )
{
# images generally have the origin at the top-left instead of the
# bottom-left, so given nothing else, I flip the y axis
if( !defined $options{xmin} && !defined $options{xmax} &&
!defined $options{ymin} && !defined $options{ymax} &&
! any { /^ *xrange\b/ } @{$options{set}} &&
! any { /^ *yrange\b/ } @{$options{set}} )
{
push @{$options{set}}, "xrange [:] noextend";
push @{$options{set}}, "yrange [:] reverse noextend";
}
if ( ! -r $options{image} )
{
die "Couldn't read image '$options{image}'";
}
unshift @{$options{equation}}, qq{"$options{image}" binary filetype=auto flipy with rgbimage title "$options{image}"};
delete $options{image};
}
}
sub getGnuplotVersion
{
open(GNUPLOT_VERSION, 'gnuplot --version |') or die "Couldn't run gnuplot";
my ($gnuplotVersion) = <GNUPLOT_VERSION> =~ /gnuplot\s*(\d*\.\d*)/;
if (!$gnuplotVersion)
{
print STDERR "Couldn't find the version of gnuplot. Does it work? Trying anyway...\n";
$gnuplotVersion = 0;
}
close(GNUPLOT_VERSION);
return $gnuplotVersion;
}
sub sendRangeCommand
{
my ($name, $min, $max) = @_;
return unless defined $min || defined $max;
if( defined $min )
{ $min = "\"$min\""; }
else
{ $min = ''; }
if( defined $max )
{ $max = "\"$max\""; }
else
{ $max = ''; }
my $cmd = "set $name [$min:$max]\n";
print PIPE $cmd;
}
sub makeDomainNumeric
{
my ($domain0) = @_;
if ( $options{timefmt} )
{
my $timepiece = Time::Piece->strptime( $domain0, $options{timefmt} )
or die "Couldn't parse time format. String '$domain0' doesn't fit format '$options{timefmt}'";
return $timepiece->epoch();
}
return $domain0;
}
my $prev_timed_replot_time = [gettimeofday];
my $pipe_in;
my $selector;
my $line_number = 0;
my $is_stdin = !@ARGV; # read stdin only if no data files given on the cmdline
sub openNextFile
{
my $fd;
if($is_stdin)
{
$fd = IO::Handle->new();
$fd->fdopen(fileno(STDIN), "r") or die "Couldn't open STDIN";
}
else
{
my $filename = shift @ARGV;
$fd = IO::File->new($filename, "r") or die "Couldn't open file '$filename'";
}
my $selector = IO::Select->new( $fd );
return ($fd, $selector);
}
sub getNextLine
{
sub getline_internal
{
while(1)
{
my $line = $pipe_in->getline();
if( !$is_stdin && !defined $line && $pipe_in->eof() && @ARGV)
{
# I got to the end of one file, so open the next one (which I'm
# sure exists)
($pipe_in, $selector) = openNextFile();
next;
}
return $line;
}
}
if( !defined $pipe_in )
{
($pipe_in, $selector) = openNextFile();
}
while(1)
{
$this_replot_is_from_timer = undef;
# if we're not streaming, or we're doing triggered-only replotting, simply
# do a blocking read
if (! $options{stream} || $options{stream} < 0)
{
$line_number++;
return getline_internal();
}
my $now = [gettimeofday];
my $time_remaining = $options{stream} - tv_interval($prev_timed_replot_time, $now);
if ( $time_remaining < 0 )
{
$prev_timed_replot_time = $now;
$this_replot_is_from_timer = 1;
return 'replot';
}
if ($selector->can_read($time_remaining))
{
$line_number++;
return getline_internal();
}
}
}
sub mainThread
{
local *PIPE;
my $outputfile;
my $outputfileType;
if( defined $options{hardcopy})
{
$outputfile = $options{hardcopy};
if( $outputfile =~ /^[^|] # starts with anything other than |
.* # stuff in the middle
\.(eps|ps|pdf|png|svg|gp)$/ix) # ends with a known extension
{
$outputfileType = lc $1;
}
my %terminalOpts =
( eps => 'postscript noenhanced solid color enhanced eps',
ps => 'postscript noenhanced solid color landscape 12',
pdf => 'pdfcairo noenhanced solid color font ",12" size 11in,8.5in',
png => 'png noenhanced size 1280,1024',
svg => 'svg noenhanced',
gp => 'gp');
if( !defined $options{terminal} &&
defined $outputfileType &&
$terminalOpts{$outputfileType} )
{
$options{terminal} = $terminalOpts{$outputfileType};
}
die "Asked to plot to file '$outputfile', but I don't know which terminal to use, and no --terminal given"
unless $options{terminal};
}
sub gpterminal
{
return defined $options{terminal} && $options{terminal} eq 'gp';
}
sub datadump_only
{
return
exists $options{dump} ||
gpterminal();
}
sub search_PATH
{
for my $pathdir (File::Spec->path())
{
my $gnuplot_execpath = File::Spec->catfile($pathdir, $_[0]);
return $gnuplot_execpath
if -x $gnuplot_execpath && ! -d $gnuplot_execpath;
}
return undef;
}
if(datadump_only())
{
if(gpterminal())
{
open PIPE, '>', $outputfile;
my $gnuplotpath = search_PATH('gnuplot');
if(!defined $gnuplotpath)
{
print STDERR "Couldn't find the gnuplot executable path. Creating .gp file still, but omitting #!. This will NOT be self-executable";
}
else
{
chmod 0755, $outputfile;
print PIPE "#!$gnuplotpath\n";
}
}
else
{
*PIPE = *STDOUT;
}
}
else
{
my $dopersist = '';
if ( getGnuplotVersion() >= 4.3 && # --persist not available before this
# --persist is needed for the "half-alive" state (see documentation for
# --exit). This state is only used with these options:
!$options{stream} && $options{exit}) {
$dopersist = '--persist';
}
# We trap SIGINT to kill the data input, but keep the plot up. see
# documentation for --exit
if ($options{stream} && !$options{exit})
{
$SIG{INT} = sub
{
print STDERR "$0 received SIGINT. Send again to quit\n";
$SIG{INT} = undef;
};
}
my $geometry = defined $options{geometry} ?
"-geometry $options{geometry}" : '';
open PIPE, "|gnuplot $geometry $dopersist" or die "Can't initialize gnuplot\n";
autoflush PIPE 1;
}
if(!gpterminal())
{
print PIPE "set terminal $options{terminal}\n" if $options{terminal};
print PIPE "set output \"$outputfile\"\n" if $outputfile;
}
# set up plotting style
my $style = '';
if($options{lines}) { $style .= 'lines';}
if($options{points}) { $style .= 'points';}
if($options{circles})
{
$options{curvestyleall} = "with circles $options{curvestyleall}";
}
print PIPE "set style data $style\n" if $style;
print PIPE "set grid\n";
print(PIPE "set xlabel \"$options{xlabel }\"\n") if defined $options{xlabel};
print(PIPE "set x2label \"$options{x2label}\"\n") if defined $options{x2label};
print(PIPE "set ylabel \"$options{ylabel }\"\n") if defined $options{ylabel};
print(PIPE "set y2label \"$options{y2label}\"\n") if defined $options{y2label};
print(PIPE "set zlabel \"$options{zlabel }\"\n") if defined $options{zlabel};
print(PIPE "set title \"$options{title }\"\n") if defined $options{title};
if($options{square})
{
# set a square aspect ratio. Gnuplot does this differently for 2D and 3D plots
if(! $options{'3d'})
{
print(PIPE "set size ratio -1\n");
}
else
{
print(PIPE "set view equal xyz\n");
}
}
if($options{square_xy})
{
print(PIPE "set view equal xy\n");
}
# For the specified values, set the legend entries to 'title "blah blah"'
if(@{$options{legend}})
{
# @{$options{legend}} is a list where consecutive pairs are (curveID,
# legend). I use $options{legend} here instead of $options{legend_hash}
# because I create a new curve when I see a new one, and the hash is
# unordered, thus messing up the ordering
my $n = scalar @{$options{legend}}/2;
foreach my $idx (0..$n-1)
{
setCurveLabel($options{legend}[$idx*2 ],
$options{legend}[$idx*2 + 1]);
}
}
# add the extra curve options
if(@{$options{curvestyle}})
{
# @{$options{curvestyle}} is a list where consecutive pairs are (curveID,
# style).
my $n = scalar @{$options{curvestyle}}/2;
foreach my $idx (0..$n-1)
{
addCurveOption($options{curvestyle}[$idx*2 ],
$options{curvestyle}[$idx*2 + 1]);
}
}
if(@{$options{every}})
{
# @{$options{every}} is a list where consecutive pairs are (curveID,
# every).
my $n = scalar @{$options{every}}/2;
foreach my $idx (0..$n-1)
{
addEveryOption($options{every}[$idx*2 ],
$options{every}[$idx*2 + 1]);
}
}
addCurveOption($_, 'axes x1y2') foreach (@{$options{x1y2}});
addCurveOption($_, 'axes x2y1') foreach (@{$options{x2y1}});
addCurveOption($_, 'axes x2y2') foreach (@{$options{x2y2}});
# timefmt
if( $options{timefmt} )
{
print(PIPE "set timefmt '$options{timefmt}'\n");
print(PIPE "set xdata time\n");
}
# set up histograms
$options{binwidth} ||= 1; # if no binwidth given, set it to 1
print PIPE
"set boxwidth $options{binwidth}\n" .
"histbin(x) = $options{binwidth} * floor(0.5 + x/$options{binwidth})\n";
setCurveAsHistogram( $_ ) foreach (@{$options{histogram}});
if(@{$options{x2y1}} || @{$options{x2y2}})
{
print PIPE "set xtics nomirror\n";
print PIPE "set x2tics\n";
# if any of the ranges are given, set the range
sendRangeCommand( "x2range", $options{x2min}, $options{x2max} );
}
if(@{$options{x1y2}} || @{$options{x2y2}})
{
print PIPE "set ytics nomirror\n";
print PIPE "set y2tics\n";
# if any of the ranges are given, set the range
sendRangeCommand( "y2range", $options{y2min}, $options{y2max} );
}
# if any of the ranges are given, set the range
sendRangeCommand( "xrange", $options{xmin}, $options{xmax} );
sendRangeCommand( "yrange", $options{ymin}, $options{ymax} );
sendRangeCommand( "zrange", $options{zmin}, $options{zmax} );
sendRangeCommand( "cbrange", $options{zmin}, $options{zmax} ) if($options{colormap});
# add the extra global options
print(PIPE "$_\n") foreach (@{$options{extracmds}});
print(PIPE "set $_\n") foreach (@{$options{set}});
print(PIPE "unset $_\n") foreach (@{$options{unset}});
# latest domain variable present in our data
my $latestX;
# The domain of the current point
my @domain;
# column headers from vnlog
my @vnlog_headers;
if($options{vnlog})
{
require Vnlog::Parser;
require Vnlog::Util;
if ( !defined $pipe_in )
{
($pipe_in, $selector) = openNextFile();
}
my $parser = Vnlog::Parser->new();
while (defined ($_ = Vnlog::Util::get_unbuffered_line($pipe_in)))
{
if ( !$parser->parse($_) )
{
die "Error parsing vnlog: $parser->{error}; looking at line '$_'";
}
my $keys = $parser->getKeys();
if (defined $keys)
{
@vnlog_headers = @$keys;
last;
}
}
if(!@vnlog_headers)
{
die "Looked through all of the first file, and never saw a vnlog legend";
}
}
# The x-axis domain represented as a number. This is exactly the same as
# $domain[0] unless the x-axis domain uses a timefmt. Then this is the
# number of seconds since the UNIX epoch.
my $domain0_numeric;
while( defined ($_ = getNextLine()) )
{
next if /^#/o;
if( $options{stream} )
{
if(/^clear/o )
{
clearCurves();
next;
}
if(/^replot/o )
{
replot( $domain0_numeric );
next;
}
last if /^exit/o;
}
# parse the incoming data lines. The format is
# x id0 dat0 id1 dat1 ....
# where idX is the ID of the curve that datX corresponds to
#
# $options{domain} indicates whether the initial 'x' is given or not (if not, the line
# number is used)
# $options{dataid} indicates whether idX is given or not (if not, the point order in the
# line is used)
# 3d plots require $options{domain}, and dictate "x y" for the domain instead of just "x"
my @fields = split;
my $i_column = 0;
if($options{domain})
{
if( $options{timefmt} )
{
# no point if doing anything unless I have at least the domain and
# 1 piece of data
next if @fields < $options{timefmt_Ncols}+1;
$domain[0] = join (' ', splice( @fields, 0, $options{timefmt_Ncols}) );
$domain0_numeric = makeDomainNumeric( $domain[0] );
$i_column += $options{timefmt_Ncols};
}
elsif(!$options{'3d'})
{
# no point if doing anything unless I have at least the domain and
# 1 piece of data
next if @fields < 1+1;
$domain[0] = $domain0_numeric = shift @fields;
$i_column += 1;
}
else
{
# no point if doing anything unless I have at least the domain and
# 1 piece of data
next if @fields < 2+1;
@domain = splice(@fields, 0, 2);
$i_column += 2;
}
if( $options{monotonic} )
{
if( defined $latestX && $domain0_numeric < $latestX )
{
# the x-coordinate of the new point is in the past, so I wipe out
# all the data and start anew. Before I wipe the old data, I
# replot the old data
replot( $domain0_numeric );
clearCurves();
$latestX = undef;
}
else
{ $latestX = $domain0_numeric; }
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