emacs/etc/ps-prin0.ps

% === BEGIN ps-print prologue 0
% version: 6.0

% Copyright (C) 2000-2023 Free Software Foundation, Inc.

% This file is part of GNU Emacs.

% GNU Emacs 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 3 of the License, or
% (at your option) any later version.

% GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

% As a special exception, the copyright holders of this module give
% you permission to include the module in a Postscript file generated
% by Emacs or other free software together with the result of
% converting text to be printed, regardless of the license terms of
% that text, and to use under terms of your choice the page images
% resulting from formatting said combination.  If you modify this
% module, you may extend this exception to your version of the module
% but you are not obligated to do so.  If you do not wish to do so,
% delete this exception statement from your version.


%%BeginProcSet: ErrorHandler
% Downloaded Error Break-page handler
% Adapted from:
%     PostScript Language Program Design,
%     Adobe Systems Incorporated.
%     Appendix A, pages 217-219

/ps$brkpage where{pop}
{
 /ps$brkpage 64 dict def
 ps$brkpage begin
  /tx 0 def/ty 0 def/toy 0 def/tox 0 def
  /prnt{
   dup type/stringtype ne{=string cvs}if
   dup length 6 mul
   /tx exch def/ty 10 def
   currentpoint/toy exch def/tox exch def
   1 setgray newpath
   tox toy 2 sub moveto
   0 ty rlineto tx 0 rlineto
   0 ty neg rlineto
   closepath fill
   tox toy moveto 0 setgray show
  }bind def
  /nl{currentpoint exch pop lmargin exch moveto 0 -10 rmoveto}def
  /=={/cp 0 def typeprint nl}def
  /typeprint{dup type dup currentdict exch known{exec}{unknowntype}ifelse}readonly def
  /lmargin 72 def
  /rmargin 72 def
  /tprint{
   dup length cp add rmargin gt{nl/cp 0 def}if
   dup length cp add/cp exch def
   prnt
  }readonly def
  /cvsprint{=string cvs tprint( )tprint}readonly def
  /unknowntype{exch pop cvlit(??)tprint cvsprint}readonly def
  /integertype{cvsprint}readonly def
  /realtype{cvsprint}readonly def
  /booleantype{cvsprint}readonly def
  /operatortype{(//)tprint cvsprint}readonly def
  /marktype{pop(-mark-)tprint}readonly def
  /dicttype{pop(-dictionary-)tprint}readonly def
  /nulltype{pop(-null-)tprint}readonly def
  /filetype{pop(-filestream-)tprint}readonly def
  /savetype{pop(-savelevel-)tprint}readonly def
  /fonttype{pop(-fontid-)tprint}readonly def
  /nametype{dup xcheck not{(/)tprint}if cvsprint}readonly def
  /stringtype{
   dup rcheck
   {(\()tprint tprint(\))tprint}
   {pop(-string-)tprint}ifelse}readonly def
  /arraytype{
   dup rcheck
   {dup xcheck
    {({)tprint{typeprint}forall(})tprint}
    {([)tprint{typeprint}forall(])tprint}ifelse}
   {pop(-array-)tprint}ifelse}readonly def
  /packedarraytype{
   dup rcheck
   {dup xcheck
    {({)tprint{typeprint}forall(})tprint}
    {([)tprint{typeprint}forall(])tprint}ifelse}
   {pop(-packedarray-)tprint}ifelse}readonly def
  /courier/Courier findfont 10 scalefont def
  /OLDhandleerror errordict/handleerror get def
 end %ps$brkpage

 /handleerror{
  systemdict begin $error begin ps$brkpage begin
  newerror
  {/newerror false store vmstatus pop pop 0 ne{grestoreall}if
   initgraphics
   ErrorMessage 1 and 0 ne{ % print on paper
    courier setfont lmargin 720 moveto
    (# ERROR: )prnt errorname prnt nl
    (# OFFENDING COMMAND: )prnt/command load prnt
    $error/ostack known
    {nl nl(# STACK:)prnt nl nl $error/ostack get aload length{==}repeat}if
    $error/errorinfo known
    {nl nl(# ERRORINFO:)prnt nl nl $error/errorinfo get aload length{==}repeat}if
    systemdict/showpage get exec}if
   ErrorMessage 2 and 0 ne{ % send back to printing system
    (\%\%[ Error: )print errorname =print
    (; OffendingCommand: )print/command load =print
    $error/errorinfo known
    {(; ErrorInfo:)print $error/errorinfo get aload length{( )=print =print}repeat}if
    ( ]\%\%)= flush
    (\%\%[ Rest of job is ignored ]\%\%)= flush}if
   /newerror true store}if
  end end end
  stop
 } % handleerror
 dup 0 systemdict put % replace name by actual dict object
 dup 4 ps$brkpage put % replace name by dict object
 bind readonly

 errordict 3 1 roll put % put proc in errordict as /handleerror
}ifelse
%%EndProcSet


% operators for language level 2 only

(<<)cvn where			% << operator
{pop/BMark(<<)cvn load def}
{/BMark{mark}bind def}ifelse
(>>)cvn where			% >> operator
{pop/EMark(>>)cvn load def}
{/EMark{counttomark 2 idiv dup dict begin{def}repeat pop currentdict end}bind def}ifelse
/setpagedevice where		% setpagedevice
{pop}
{/setpagedevice{pop}bind def}ifelse
/packedarray where		% packedarray
{pop}
{/packedarray{array astore readonly}bind def}ifelse


% device dependent operators

/DefOp{
 dup where{pop pop pop}
 {exch dup where{pop}{pop/pop}ifelse load def}ifelse}def

/duplexmode/setduplexmode DefOp
/tumble/settumble DefOp

% === END ps-print prologue 0