@@ -1,6 +1,7 @@

[chiark-utils.git] / scripts / ngspice2genspic

diff --git a/scripts/ngspice2genspic b/scripts/ngspice2genspic
new file mode 100755 (executable)
index 0000000..284235a
--- /dev/null
+++ b/scripts/ngspice2genspic
@@ -0,0 +1,95 @@
+#!/usr/bin/perl
+#   ngspice2genspic - Copyright 2004 Ian Jackson - see below
+#
+# Reads the output from ngspice and outputs a `genspic' file
+# for use with genspic2gnuplot.  Takes no arguments or options.
+#
+# Limitations
+#
+#  Only frequency (.AC) and transient plots have been tested.
+#
+#  Displaying voltages and currents on the same .TRAN graph won't work
+#   well because they currently have to have the same Y scale.
+#
+#  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 2, 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, write to the Free Software Foundation, Inc.,
+# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+die if @ARGV;
+
+while (<STDIN>) {
+    if (m/^Total CPU/) {
+       die if $mode ne '';
+       $seentcpu=1;
+    } elsif (m/^Current dynamic memory/ ||
+            m/^Dynamic memory limit/ ||
+            m/^Level not specified/ ||
+            m/^Doing analysis/ ||
+            m/^CPU time since/ ||
+            m/^Circuit\:/) {
+       die if length $mode;
+    } elsif (m/\f/) {
+       die if m/\S/;
+    } elsif (!m/\S/ && $mode eq InitTransSkip) {
+       $mode= '';
+    } elsif (m/^Initial Transient/ && $mode eq '') {
+       $mode= InitTrans;
+    } elsif (m/^Node/ && $mode eq InitTrans) {
+       $mode= InitTransSkip;
+    } elsif (m/\w/ && $mode eq InitTransSkip) {
+    } elsif (m/^\-\-/ && length $mode) {
+    } elsif (m/^\s\s+(\w+) Analysis /) {
+       if ($mode eq '') {
+           $mode= Table;
+           $ctable= $1;
+           $dokey= 1;
+       } else {
+           $dokey= 0;
+       }
+    } elsif (m/^\s\s+/ && ($mode eq Table or !length $mode)) {
+    } elsif (m/^Index / && $mode eq Table) {
+       s/\s+$//;
+       ($index,$key,@nowheadings) = split /\s+/, $_;
+       $logxy= 0+($key eq 'frequency');
+    } elsif (m/^\d+\s/ && $mode eq Table) {
+       ($index,$key,@nowcolumns) = split /\s+/, $_;
+       shift @nowcolumns if $key =~ s/\,$//;
+       $coldata[$index] .= " $key" if $dokey;
+       $coldata[$index] .= " @nowcolumns";
+       if (!$index) {
+           foreach $c (@nowheadings) {
+               $h= 'y';
+               $h= 'y2' if $c =~ m/^ph\(/;
+               push @columns, "$h:$c";
+           }
+       }
+    } elsif (!m/\S/ && $mode eq Table) {
+       print "S $ctable $logxy @columns\n" or die $!;
+       foreach $l (@coldata) { printf "D%s\n", $l or die $!; }
+       print "T\n" or die $!;
+       $mode= '';
+       @columns= ();
+       @coldata= ();
+    } elsif (!m/\S/) {
+       $mode= '' if $mode eq InitTransSkip;
+    } else {
+       die "$mode: $_ ?";
+    }
+}
+die "no plots" unless defined $ctable;
+print "F\n" or die $!;
+
+# $Id: ngspice2genspic,v 1.1 2004-03-25 00:29:59 ianmdlvl Exp $