%!%    Copyright (C) 1992, 1996, 1998 Aladdin Enterprises.  All rights reserved.% % This software is provided AS-IS with no warranty, either express or% implied.% % This software is distributed under license and may not be copied,% modified or distributed except as expressly authorized under the terms% of the license contained in the file LICENSE in this distribution.% % For more information about licensing, please refer to% http://www.ghostscript.com/licensing/. For information on% commercial licensing, go to http://www.artifex.com/licensing/ or% contact Artifex Software, Inc., 101 Lucas Valley Road #110,% San Rafael, CA  94903, U.S.A., +1(415)492-9861. % $Id: errpage.ps,v 1.4 2002/02/21 21:49:28 giles Exp $% Print an informative error page if an error occurs.% Inspired by Adobe's `ehandler.ps' and David Holzgang's PinPoint. /EPdict 80 dict defEPdict begin /escale 12 def/efont /Helvetica findfont escale scalefont def/eheight escale 1.2 mul def % Miscellaneous utilities/xdef { exch def } bind def % Define `show' equivalents of = and == /show= { =string { cvs } stopped { pop pop (==unprintable==) } if show } bind def /.dict 18 dict def.dict begin  /.buf =string def  /.cvp {.buf cvs show} bind def  /.nop {(-) .p type .cvp (-) .p} bind def  /.p {show} bind def  /.p1 {( ) dup 0 4 -1 roll put show} bind def  /.print	{dup type .dict exch known	 {dup type exec} {.nop} ifelse	} bind def  /integertype /.cvp load def  /nulltype { pop (null) .p } bind def  /realtype /.cvp load def  /booleantype /.cvp load def  /nametype	{dup xcheck not {(/) .p} if	 dup length .buf length gt	  {dup length string}	  {.buf}	 ifelse cvs .p} bind def  /arraytype	{dup rcheck	  {dup xcheck {(})({)} {(])([)} ifelse .p	   exch () exch	   {exch .p .print ( )} forall pop .p}	  {.nop}	 ifelse} bind def  /operatortype  	{(--) .p .cvp (--) .p} bind def  /packedarraytype /arraytype load def  /stringtype	{dup rcheck	  {(\() .p	   {/.ch exch def	    .ch 32 lt .ch 127 ge or	    {(\\) .p .ch 8#1000 add 8 .buf cvrs 1 3 getinterval .p}	    {.ch 40 eq .ch 41 eq or .ch 92 eq or	     {(\\) .p} if	     .ch .p1}	    ifelse}	   forall (\)) .p}	  {.nop}	 ifelse} bind defend/show== { .dict begin .print end } bind def % Printing utilities /eol { /ey ey eheight sub def   ex ey moveto } bind def/setx { /ex xdef ex ey moveto } bind def/setxy { /ey xdef /ex xdef   ex ey moveto } bind def/indent { /lx ex def   (    ) show currentpoint setxy } bind def/unindent { lx setx } bind def % Get the name of the n'th dictionary on the (saved) dictionary stack./nthdictname	% n -> name true | false { dup dstack exch get   exch -1 0    { dstack exch get       { 2 index eq { exch pop exit } { pop } ifelse       }      forall      dup type /nametype eq { exit } if    }   for   dup type /nametype eq { true } { pop false } ifelse } bind def % Find the name of a currently executing procedure./findprocname	% <proctail> findprocname <dstackindex> <procname> true		% <proctail> findprocname false { dup length /proclength xdef   dup type cvlit /proctype xdef   dstack length 1 sub -1 0    { dup dstack exch get       { dup type proctype eq          { dup rcheck { dup length } { -1 } ifelse proclength gt	     { dup length proclength sub proclength getinterval 3 index eq	        { 3 -1 roll pop exit }		{ pop }	       ifelse	     }	     { pop pop	     }	    ifelse	  }	  { pop pop	  }	 ifelse       }      forall      dup type /nametype eq { exit } if      pop    }   for   dup type /nametype eq { true } { pop false } ifelse } bind def % Error printing routine.% The top 2 elements of the o-stack are systemdict and EPdict.% For the moment, we ignore the possibility of stack overflow or VMerror./showerror	% <command> <countexecstack> <errorname> showerror - {	% Restore the error handlers.    saveerrordict { errordict 3 1 roll put } forall   $error /recordstacks false put 	% Save information from the stacks.    /saveerror xdef   countexecstack array execstack   0 3 -1 roll 1 sub getinterval   /estack xdef   /savecommand xdef    countdictstack array dictstack   dup length 2 sub 0 exch getinterval   /dstack xdef 	% Save state variables that will be reset.	% (We could save and print a lot more of the graphics state.)    /savefont currentfont def   mark { savefont /FontName get =string cvs cvn } stopped    { cleartomark null }    { exch pop dup length 0 eq { pop null } if }   ifelse /savefontname xdef   efont setfont     { currentpoint } stopped { null null } if   /savey xdef /savex xdef   0 0    { pop pop }    { pop pop 1 add }    { pop pop pop pop pop pop exch 1 add exch }    { }   pathforall   /savelines xdef /savecurves xdef   /savepathbbox { [ pathbbox ] } stopped { pop null } if def    initmatrix    clippath pathbbox     /savecliptop xdef /saveclipright xdef     /saveclipbottom xdef /saveclipleft xdef   initclip    initgraphics 	% Eject the current page.    showpage 	% Print the page heading.    18 clippath pathbbox newpath   4 1 roll pop pop pop eheight sub 12 sub setxy   product (Product: )   statusdict /printername known    { 100 string statusdict begin printername end      dup length 0 gt       { exch pop exch pop (Printer name: ) }       { pop }      ifelse    }   if show show eol   (Interpreter version ) show version show eol   (Error: ) show saveerror show= eol   (Command being executed: ) show /savecommand load show= eol   currentfile { fileposition } stopped    { pop }    { (Position in input file: ) show show= eol }   ifelse eol 	% Print the current graphics state.    (Page parameters:) show eol indent   (page size: ) show     gsave clippath pathbbox grestore     exch 3 index sub show= (pt x ) show     exch sub show= (pt) show pop eol   (current position: ) show   savex null eq    { (none) show }    { (x = ) show savex show= (, y = ) show savey show= }   ifelse eol   savelines savecurves add 0 eq    { (current path is empty) show    }    { (current path: ) show savelines show= ( line(s), ) show      savecurves show= ( curve(s)) show eol      (path bounding box: ) show savepathbbox show==    }   ifelse eol   (current font: ) show     savefontname dup null eq      { pop (--no name--) show }      { show= ( ) show        gsave        savefontname findfont /FontMatrix get matrix invertmatrix	grestore        savefont /FontMatrix get matrix concatmatrix	dup 1 get 0 eq 1 index 2 get 0 eq and	1 index 4 get 0 eq and 1 index 5 get 0 eq and	1 index 0 get 2 index 3 get eq and	 { 0 get show= (pt) show }	 { (scaled by ) show show= }	ifelse      }     ifelse eol   eol unindent 	% Print the operand stack.    /stky ey def   (Operand stack:) show eol indent   count { show== eol } repeat   eol unindent 	% Print the dictionary stack.    (Dictionary stack:) show eol indent   dstack length 1 sub -1 0    { nthdictname { show= } { (<unknown>) show } ifelse eol    } for   eol unindent 	% Print the execution stack.    280 stky setxy   (Execution stack:) show eol indent   estack length 1 sub -1 1    { estack exch get      dup type /operatortype eq       { show= eol       }       { dup type dup /arraytype eq exch /packedarraytype eq or          { dup xcheck	     { dup rcheck	        { findprocname		   { show= nthdictname { ( in ) show show= } if eol		   }		  if		}		{ pop		}	       ifelse	     }	     { pop	     }	    ifelse	  }	  { pop	  }	 ifelse       }      ifelse    } for eol unindent 	% Print the next few lines of input.	% Unfortunately, this crashes on an Adobe printer. (   (Next few lines of input:) show eol indent   /input currentfile def   mark { 4    { input ( ) readstring not { pop exit } if      dup 0 get dup 10 eq       { pop pop eol 1 sub dup 0 eq { pop exit } if }       { dup 13 eq { pop pop } { pop show } ifelse }      ifelse    }   loop } stopped cleartomark eol unindent) pop 	% Wrap up.    showpage   quit  } def % Define the common procedure for handling errors./doerror { systemdict begin EPdict begin showerror } bind def end % Install our own error handlers. /EPinstall { EPdict begin   /saveerrordict errordict length dict def   errordict saveerrordict copy pop   errordict    { pop [ /countexecstack load 2 index cvlit /doerror load /exec load ] cvx      errordict 3 1 roll put    } forall   errordict /handleerror     [ /countexecstack load /handleerror /doerror load /exec load     ] cvx   put   end } bind def EPinstall