Add skeleton of texinfo reference manual.

doc/CONTRIBUTORS

-$Id: CONTRIBUTORS,v 1.24 2003-03-07 20:15:14 geuzaine Exp $
+$Id: CONTRIBUTORS,v 1.25 2003-03-12 23:41:45 geuzaine Exp $
 
 Gmsh is copyright (c) 1997-2003 by
 
-  Jean-Francois Remacle <remacle@gce.ucl.ac.be> and
-  Christophe Geuzaine <geuzaine@acm.caltech.edu>
+  Jean-Francois Remacle <remacle@@gce.ucl.ac.be> and
+  Christophe Geuzaine <geuzaine@@acm.caltech.edu>
 
 Portions of Gmsh are copyright (c)
 
@@ -16,17 +16,17 @@ This version of Gmsh may also contain code copyright (c) 1993, 1995,
 1997, 1998, 2002 Jonathan Richard Shewchuk: check the configuration
 options.
 
-Special thanks to David Colignon <David.Colignon@univ.u-3mrs.fr> for
-new colormaps; Patrick Dular <patrick.dular@ulg.ac.be> for transfinite
-mesh bug fixes; Laurent Stainier <l.stainier@ulg.ac.be> for the Mac OS
+Special thanks to David Colignon <David.Colignon@@univ.u-3mrs.fr> for
+new colormaps; Patrick Dular <patrick.dular@@ulg.ac.be> for transfinite
+mesh bug fixes; Laurent Stainier <l.stainier@@ulg.ac.be> for the Mac OS
 port and the tensor display code; Nicolas Tardieu
-<nicolas.tardieu@edf.fr> and Pierre Badel <badel@freesurf.fr> for help
-with the GSL integration and Marc Ume <Marc.Ume@digitalgraphics.be>
+<nicolas.tardieu@@edf.fr> and Pierre Badel <badel@@freesurf.fr> for help
+with the GSL integration and Marc Ume <Marc.Ume@@digitalgraphics.be>
 for the original list code.
 
-Special thanks also to Bill Spitzak <spitzak@users.sourceforge.net>,
-Michael Sweet <easysw@users.sourceforge.net>, Matthias Melcher
-<mm@matthiasm.com> and others for the Fast Light Tool Kit on which
+Special thanks also to Bill Spitzak <spitzak@@users.sourceforge.net>,
+Michael Sweet <easysw@@users.sourceforge.net>, Matthias Melcher
+<mm@@matthiasm.com> and others for the Fast Light Tool Kit on which
 Gmsh's GUI is based. See http://www.fltk.org for more info on this
 excellent object-oriented, cross-platform toolkit.
 
@@ -35,15 +35,15 @@ providing fresh ideas on theoretical or programming topics, who have
 sent patches, requests for changes or improvements, or who gave us
 access to exotic machines for testing Gmsh:
 
-  Juan Abanto <juanabanto@yahoo.com>
-  Olivier Adam <o.adam@ulg.ac.be>
-  Guillaume Alleon <guillaume.alleon@airbus.aeromatra.com>
-  Eric Bechet <eric.bechet@epost.de>
-  Laurent Champaney <laurent.champaney@meca.uvsq.fr>
-  Pascal Dupuis <Pascal.Dupuis@esat.kuleuven.ac.be>
-  Philippe Geuzaine <geuzaine@gnat.colorado.edu>
-  Johan Gyselinck <johan.gyselinck@ulg.ac.be>
-  Francois Henrotte <fhenrott@esat.kuleuven.ac.be>
-  Benoit Meys <bmeys@techspace-aero.be>
-  Nicolas Moes <moes@tam9.mech.nwu.edu>
-  Chad Schmutzer <schmutze@acm.caltech.edu>
+  Juan Abanto <juanabanto@@yahoo.com>
+  Olivier Adam <o.adam@@ulg.ac.be>
+  Guillaume Alleon <guillaume.alleon@@airbus.aeromatra.com>
+  Eric Bechet <eric.bechet@@epost.de>
+  Laurent Champaney <laurent.champaney@@meca.uvsq.fr>
+  Pascal Dupuis <Pascal.Dupuis@@esat.kuleuven.ac.be>
+  Philippe Geuzaine <geuzaine@@gnat.colorado.edu>
+  Johan Gyselinck <johan.gyselinck@@ulg.ac.be>
+  Francois Henrotte <fhenrott@@esat.kuleuven.ac.be>
+  Benoit Meys <bmeys@@techspace-aero.be>
+  Nicolas Moes <moes@@tam9.mech.nwu.edu>
+  Chad Schmutzer <schmutze@@acm.caltech.edu>
\ No newline at end of file

doc/Makefile

-# $Id: Makefile,v 1.4 2003-02-11 09:31:40 geuzaine Exp $
+# $Id: Makefile,v 1.5 2003-03-12 23:41:45 geuzaine Exp $
 
-dvi:
-	texi2dvi gmsh.texi 
-
-ps: dvi
-	dvips gmsh -o
-
-pdf:
-	texi2pdf gmsh.texi 
-
-html:
-	texi2html -expandinfo -number -split_chapter gmsh.texi
-
-html2:
-	Texi2html -init_file gmsh.htmlconfig gmsh.texi
-
-html3:
-	makeinfo --html gmsh.texi
-
-info:
-	makeinfo gmsh.texi
-
-infoz:
-	gtar zcvf gmsh-info.tgz gmsh.info*
-
-doc: ps pdf html info
-
-install:
-	cp gmsh.info* /usr/local/info/
-	install-info gmsh.info /usr/local/info/dir
+all:
+	chmod 644 *
+	cd texinfo && ${MAKE} all
 
 clean:
-	rm -f *.cp* *.fn* *.ky* *.pg* *.tp* *.vr* *.mv* *.log *.toc\
-              *.aux *.dvi *.ps gmsh.pdf *.info* gmsh-info.tgz*
-
-
+	rm -f *~ .*~
+	cd texinfo && ${MAKE} clean

doc/texinfo/Makefile

+# $Id: Makefile,v 1.1 2003-03-12 23:41:45 geuzaine Exp $
+
+dvi:
+	texi2dvi gmsh.texi 
+
+ps: dvi
+	dvips gmsh -o
+
+pdf:
+	texi2pdf gmsh.texi 
+
+html:
+	./texi2html -init_file gmsh.t2h gmsh.texi
+	rm -f index.html
+	ln -s gmsh.html index.html
+
+html2:
+	makeinfo --html gmsh.texi
+
+info:
+	makeinfo gmsh.texi
+
+install-info:
+	cp gmsh.info* /usr/info/
+	install-info gmsh.info /usr/info/dir
+
+infoz: info
+	gtar zcvf gmsh-info.tgz gmsh.info*
+
+all: ps pdf html infoz
+
+clean:
+	rm -f *.cp* *.fn* *.ky* *.pg* *.tp* *.vr* *.mv* \
+                         *.log *.toc *.aux *.dvi *.html \
+                         gmsh.ps gmsh.pdf gmsh.info* \
+                         gmsh-info.tgz gmsh-doc.tgz
+

doc/texinfo/README

+
+This directory contains the Texinfo source files for the Gmsh
+documentation. Various output formats can be created:
+
+To produce:                   Type:              Requirements:
+--------------------------------------------------------------------
+a dvi file (TeX device        make dvi           TeX, Texinfo
+independent file)
+
+a postscript file             make ps            TeX, Texinfo, dvips
+
+a pdf file                    make pdf           TeX, Texinfo
+
+a collection of html          make html          Perl
+files
+
+the interactive info          make info          Texinfo
+(GNU project-like) 
+documentation
+

doc/texinfo/epstopdf

+#!/usr/local/bin/perl
+
+# Change by Thomas Esser, Sept. 1998: The above lines allows us to find
+# perl along $PATH rather than guessing a fixed location. The above
+# construction should work with most shells.
+
+# A script to transform an EPS file so that:
+#   a) it is guarenteed to start at the 0,0 coordinate
+#   b) it sets a page size exactly corresponding to the BoundingBox
+# This means that when Ghostscript renders it, the result needs no
+# cropping, and the PDF MediaBox is correct.
+#   c) the result is piped to Ghostscript and a PDF version written
+#
+# It needs a Level 2 PS interpreter.
+# If the bounding box is not right, of course, you have problems...
+#
+# The only thing I have not allowed for is the case of
+# "%%BoundingBox: (atend)", which is more complicated.
+#
+# Sebastian Rahtz, for Elsevier Science
+#
+# now with extra tricks from Hans Hagen's texutil.
+#
+# History
+#  1999/05/06 v2.5 (Heiko Oberdiek)
+#    * New options: --hires, --exact, --filter, --help.
+#    * Many cosmetics: title, usage, ...
+#    * New code for debug, warning, error
+#    * Detecting of cygwin perl
+#    * Scanning for %%{Hires,Exact,}BoundingBox.
+#    * Scanning only the header in order not to get a wrong
+#      BoundingBox of an included file.
+#    * (atend) supported.
+#    * uses strict; (earlier error detecting).
+#    * changed first comment from '%!PS' to '%!';
+#    * corrected (atend) pattern: '\s*\(atend\)'
+#    * using of $bbxpat in all BoundingBox cases,
+#      correct the first white space to '...Box:\s*$bb...'
+#    * corrected first line (one line instead of two before 'if 0;';
+#
+
+### program identification
+my $program = "epstopdf";
+my $filedate="1999/05/06";
+my $fileversion="2.5";
+my $copyright = "Copyright 1998,1999 by Sebastian Rahtz et al.";
+my $title = "\U$program\E $fileversion, $filedate - $copyright\n";
+
+### ghostscript command name
+my $GS = "gs";
+$GS = "gswin32c" if $^O eq 'MSWin32';
+$GS = "gswin32c" if $^O =~ /cygwin/;
+
+### options
+$::opt_help=0;
+$::opt_debug=0;
+$::opt_compress=1;
+$::opt_gs=1;
+$::opt_hires=0;
+$::opt_exact=0;
+$::opt_filter=0;
+$::opt_outfile="";
+
+### usage
+my @bool = ("false", "true");
+my $usage = <<"END_OF_USAGE";
+${title}Syntax:  $program [options] <eps file>
+Options:
+  --help:           print usage
+  --outfile=<file>: write result to <file>
+  --(no)filter:     read standard input   (default: $bool[$::opt_filter])
+  --(no)gs:         run ghostscript       (default: $bool[$::opt_gs])
+  --(no)compress:   use compression       (default: $bool[$::opt_compress])
+  --(no)hires:      scan HiresBoundingBox (default: $bool[$::opt_hires])
+  --(no)exact:      scan ExactBoundingBox (default: $bool[$::opt_exact])
+  --(no)debug:      debug informations    (default: $bool[$::opt_debug])
+Examples for producing 'test.pdf':
+  * $program test.eps
+  * produce postscript | $program --filter >test.pdf
+  * produce postscript | $program -f -d -o=test.pdf
+Example: look for HiresBoundingBox and produce corrected PostScript:
+  * $program -d --nogs -hires test.ps>testcorr.ps 
+END_OF_USAGE
+
+### process options
+use Getopt::Long;
+GetOptions (
+  "help!",
+  "debug!",
+  "filter!",
+  "compress!",
+  "gs!",
+  "hires!",
+  "exact!",
+  "outfile=s",
+) or die $usage;
+
+### help functions
+sub debug {
+  print STDERR "* @_\n" if $::opt_debug;
+}
+sub warning {
+  print STDERR "==> Warning: @_!\n";
+}
+sub error {
+  die "$title!!! Error: @_!\n";
+}
+sub errorUsage {
+  die "$usage\n!!! Error: @_!\n";
+}
+
+### option help
+die $usage if $::opt_help;
+
+### get input filename
+my $InputFilename = "";
+if ($::opt_filter) {
+  @ARGV == 0 or 
+    die errorUsage "Input file cannot be used with filter option";
+  $InputFilename = "-";
+  debug "Input file: standard input";
+}
+else {
+  @ARGV > 0 or die errorUsage "Input filename missing";
+  @ARGV < 2 or die errorUsage "Unknown option or too many input files";
+  $InputFilename = $ARGV[0];
+  -f $InputFilename or error "'$InputFilename' does not exist";
+  debug "Input filename:", $InputFilename;
+}
+
+### option compress
+my $GSOPTS = "";
+$GSOPTS = "-dUseFlateCompression=false " unless $::opt_compress;
+
+### option BoundingBox types
+my $BBName = "%%BoundingBox:";
+!($::opt_hires and $::opt_exact) or
+  error "Options --hires and --exact cannot be used together";
+$BBName = "%%HiresBoundingBox:" if $::opt_hires;
+$BBName = "%%ExactBoundingBox:" if $::opt_exact;
+debug "BoundingBox comment:", $BBName;
+
+### option outfile
+my $OutputFilename = $::opt_outfile;
+if ($OutputFilename eq "") {
+  if ($::opt_gs) {
+    $OutputFilename = $InputFilename;
+    if (!$::opt_filter) {
+      $OutputFilename =~ s/\.[^\.]*$//;
+      $OutputFilename .= ".pdf";
+    }
+  }
+  else {
+    $OutputFilename = "-"; # standard output
+  }
+}
+if ($::opt_filter) {
+  debug "Output file: standard output";
+}
+else {
+  debug "Output filename:", $OutputFilename;
+}
+
+### option gs
+if ($::opt_gs) {
+  debug "Ghostscript command:", $GS;
+  debug "Compression:", ($::opt_compress) ? "on" : "off";
+}
+
+### open input file
+open(IN,"<$InputFilename") or error "Cannot open", 
+  ($::opt_filter) ? "standard input" : "'$InputFilename'";
+binmode IN;
+
+### open output file
+if ($::opt_gs) {
+  my $pipe = "$GS -q -sDEVICE=pdfwrite $GSOPTS " .
+          "-sOutputFile=$OutputFilename - -c quit";
+  debug "Ghostscript pipe:", $pipe;
+  open(OUT,"|$pipe") or error "Cannot open Ghostscript for piped input";
+}
+else {
+  open(OUT,">$OutputFilename") or error "Cannot write '$OutputFilename";
+}
+
+### scan first line
+my $header = 0;
+$_ = <IN>;
+if (/%!/) {
+  # throw away binary junk before %!
+  s/(.*)%!/%!/o;
+}
+$header = 1 if /^%/;
+debug "Scanning header for BoundingBox";
+print OUT;
+
+### variables and pattern for BoundingBox search
+my $bbxpatt = '[0-9eE\.\-]';
+               # protect backslashes: "\\" gets '\'
+my $BBValues = "\\s*($bbxpatt+)\\s+($bbxpatt+)\\s+($bbxpatt+)\\s+($bbxpatt+)";
+my $BBCorrected = 0;
+
+sub CorrectBoundingBox {
+  my ($llx, $lly, $urx, $ury) = @_;
+  debug "Old BoundingBox:", $llx, $lly, $urx, $ury;
+  my ($width, $height) = ($urx - $llx, $ury - $lly);
+  my ($xoffset, $yoffset) = (-$llx, -$lly);
+  debug "New BoundingBox: 0 0", $width, $height;
+  debug "Offset:", $xoffset, $yoffset;
+
+  print OUT "%%BoundingBox: 0 0 $width $height\n";
+  print OUT "<< /PageSize [$width $height] >> setpagedevice\n";
+  print OUT "gsave $xoffset $yoffset translate\n";
+}
+
+### scan header
+if ($header) {
+  while (<IN>) {
+
+    ### end of header
+    if (!/^%/ or /^%%EndComments/) {
+      print OUT;
+      last;
+    }
+
+    ### BoundingBox with values
+    if (/^$BBName$BBValues/) {
+      CorrectBoundingBox $1, $2, $3, $4;
+      $BBCorrected = 1;
+      last;
+    }
+
+    ### BoundingBox with (atend)
+    if (/^$BBName\s*\(atend\)/) {
+      debug $BBName, "(atend)";
+      if ($::opt_filter) {
+        warning "Cannot look for BoundingBox in the trailer",
+                "with option --filter";
+        last;
+      }
+      my $pos = tell(IN);
+      debug "Current file position:", $pos;
+
+      # looking for %%BoundingBox
+      while (<IN>) {
+        # skip over included documents
+        if (/^%%BeginDocument/) {
+          while (<IN>) {
+            last if /^%%EndDocument/;
+          }
+        }
+        if (/^$BBName$BBValues/) {
+          CorrectBoundingBox $1, $2, $3, $4;
+          $BBCorrected = 1;
+          last;
+        }
+      }
+
+      # go back
+      seek(IN, $pos, 0) or error "Cannot go back to line '$BBName (atend)'";
+      last;
+    }
+    
+    # print header line
+    print OUT;
+  }
+}
+
+### print rest of file
+while (<IN>) {
+  print OUT;
+}
+
+### close files
+close(IN);
+print OUT "grestore\n" if $BBCorrected;
+close(OUT);
+warning "BoundingBox not found" unless $BBCorrected;
+debug "Ready.";
+;

doc/texinfo/gmsh.t2h

+
+# possible de changer ceci aussi en ligne de commande
+
+$T2H_SPLIT = 'chapter';
+$T2H_SPLIT_INDEX = 1000;
+
+# The following can only be set in the init file
+
+$T2H_INDEX_CHAPTER = 'Concept index';

doc/texinfo/gpl.texi

+@center Version 2, June 1991
+
+@c This file is intended to be included in another file.
+
+@display
+Copyright @copyright{} 1989, 1991 Free Software Foundation, Inc.
+59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+@end display
+
+@heading Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software---to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+@heading TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+@enumerate 0
+@item
+This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The ``Program'', below,
+refers to any such program or work, and a ``work based on the Program''
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term ``modification''.)  Each licensee is addressed as ``you''.
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+@item
+You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+@item
+You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+@enumerate a
+@item
+You must cause the modified files to carry prominent notices
+stating that you changed the files and the date of any change.
+
+@item
+You must cause any work that you distribute or publish, that in
+whole or in part contains or is derived from the Program or any
+part thereof, to be licensed as a whole at no charge to all third
+parties under the terms of this License.
+
+@item
+If the modified program normally reads commands interactively
+when run, you must cause it, when started running for such
+interactive use in the most ordinary way, to print or display an
+announcement including an appropriate copyright notice and a
+notice that there is no warranty (or else, saying that you provide
+a warranty) and that users may redistribute the program under
+these conditions, and telling the user how to view a copy of this
+License.  (Exception: if the Program itself is interactive but
+does not normally print such an announcement, your work based on
+the Program is not required to print an announcement.)
+@end enumerate
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+@item
+You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+@enumerate a
+@item
+Accompany it with the complete corresponding machine-readable
+source code, which must be distributed under the terms of Sections
+1 and 2 above on a medium customarily used for software interchange; or,
+
+@item
+Accompany it with a written offer, valid for at least three
+years, to give any third party, for a charge no more than your
+cost of physically performing source distribution, a complete
+machine-readable copy of the corresponding source code, to be
+distributed under the terms of Sections 1 and 2 above on a medium
+customarily used for software interchange; or,
+
+@item
+Accompany it with the information you received as to the offer
+to distribute corresponding source code.  (This alternative is
+allowed only for noncommercial distribution and only if you
+received the program in object code or executable form with such
+an offer, in accord with Subsection b above.)
+@end enumerate
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+@item
+You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+@item
+You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+@item
+Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+@item
+If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+@item
+If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+@item
+The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and ``any
+later version'', you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+@item
+If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+@heading NO WARRANTY
+
+@item
+BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM ``AS IS'' WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+@item
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+@end enumerate
+
+@heading END OF TERMS AND CONDITIONS
+
+@sp 2
+@heading How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the ``copyright'' line and a pointer to where the full notice is found.
+
+@smallexample
+@var{one line to give the program's name and a brief idea of what it does.}
+Copyright (C) @var{yyyy}  @var{name of author}
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it 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.
+@end smallexample
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+@smallexample
+Gnomovision version 69, Copyright (C) 19@var{yy} @var{name of author}
+Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type
+`show w'.
+This is free software, and you are welcome to redistribute it
+under certain conditions; type `show c' for details.
+@end smallexample
+
+The hypothetical commands @samp{show w} and @samp{show c} should show
+the appropriate parts of the General Public License.  Of course, the
+commands you use may be called something other than @samp{show w} and
+@samp{show c}; they could even be mouse-clicks or menu items---whatever
+suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a ``copyright disclaimer'' for the program, if
+necessary.  Here is a sample; alter the names:
+
+@example
+Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+`Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+@var{signature of Ty Coon}, 1 April 1989
+Ty Coon, President of Vice
+@end example
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.