386BSD 0.1 development

[unix-history] / usr / othersrc / public / ghostscript-2.4.1 / traceop.ps

%    Copyright (C) 1992 Aladdin Enterprises.  All rights reserved.
%    Distributed by Free Software Foundation, Inc.
%
% This file is part of Ghostscript.
%
% Ghostscript is distributed in the hope that it will be useful, but
% WITHOUT ANY WARRANTY.  No author or distributor accepts responsibility
% to anyone for the consequences of using it or for whether it serves any
% particular purpose or works at all, unless he says so in writing.  Refer
% to the Ghostscript General Public License for full details.
%
% Everyone is granted permission to copy, modify and redistribute
% Ghostscript, but only under the conditions described in the Ghostscript
% General Public License.  A copy of this license is supposed to have been
% given to you along with Ghostscript so you can know your rights and
% responsibilities.  It should be in a file named COPYING.  Among other
% things, the copyright notice and this notice must be preserved on all
% copies.

% Trace individual operators or procedures.
% <opref> is <opname> or <opname> <dict> (dict defaults to userdict).
% <opref> traceop prints vmem usage before;
% <opref> <numargs|preproc> prints arguments or runs proc before;
% <opref> <numargs|preproc> <numresults|postproc>
%    also prints results or runs proc after.
% If traceflush is true, flush the output after each printout.
/traceflush true def

% Define the default "before" action
/tracebefore { vmstatus 3 traceprint pop pop pop } def

% Define the default "after" action
/traceafter { } def

/traceprint
 { dup type /integertype eq
    { 1 sub -1 0 { ( ) print index ==only } for }
    { exec }
   ifelse
 } bind def
/traceend
 { traceflush { flush } if
 } bind def
/traceop
 { userdict begin
   dup type dup /nametype eq exch /dicttype eq or { { tracebefore } } if
   1 index type dup /nametype eq exch /dicttype eq or { { traceafter } } if
   /.tpost exch def /.tpre exch def
   dup type /dicttype ne
    { dup where not { userdict 1 index {} put userdict } if
    } if
   /.tdict exch def /.tname exch def
   .tdict dup systemdict eq { pop userdict } if /.tddict exch def
   [ .tname /=only cvx ( ) /print cvx
     /.tpre load /traceprint cvx /traceend cvx
     .tdict .tname get
     dup xcheck
      { dup type dup /arraytype eq exch /packedarraytype eq or
         { /exec cvx
	 } if
      } if
     /.tpost load /traceprint cvx (\n) /print cvx /traceend cvx
   ] cvx .tddict exch .tname exch put end
 } bind def
/bind { } def		% disable