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% Copyright (C) 1992, 1993, 1994, 1999 Aladdin Enterprises. All rights reserved.
%
% This file is part of GNU Ghostscript.
%
% GNU 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 GNU General Public License for full details.
%
% Everyone is granted permission to copy, modify and redistribute GNU
% Ghostscript, but only under the conditions described in the GNU General
% Public License. A copy of this license is supposed to have been given
% to you along with GNU 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.
% $RCSfile: traceop.ps,v $ $Revision: 1.2.2.1 $
% 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
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