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+% Copyright (C) 1992, 1993, 1994, 1999 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: traceop.ps 6300 2005-12-28 19:56:24Z giles $
+% Trace individual operators or procedures.
+% <opref> is <opname> or <opname> <dict>
+% (dict defaults to dict where op is currently defined, if writable;
+% otherwise uses 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
+
+currentpacking true setpacking
+.currentglobal true .setglobal
+
+% 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
+ dup dup wcheck not {
+ (Warning: substituting userdict for non-writable dictionary.) =
+ pop userdict
+ } if
+ /.tddict exch def /.tdict exch def /.tname exch cvlit def
+ .currentglobal [
+ .tname /=only cvx ( ) /print cvx
+ /.tpre load /traceprint cvx /traceend cvx
+ .tdict .tname get /.tdef 1 index cvlit def
+ dup xcheck {
+ dup type dup /arraytype eq exch /packedarraytype eq or {
+ /exec cvx
+ } if
+ } if
+ /.tpost load /traceprint cvx () /= cvx /traceend cvx
+ .tdef gcheck /.tpre load gcheck and /.tpost load gcheck and .setglobal
+ ] cvx
+ .tdef type /operatortype eq {
+ .tname exch .makeoperator
+ } if
+ exch .setglobal
+ .tddict exch .tname exch put
+ end % userdict
+} bind def
+/tracebind /bind load def % in case someone wants to put it back
+/bind { } def % disable
+
+.setglobal
+setpacking