Import sources from 2011-03-30 iso image - sys/lib

1 files changed, 118 insertions, 0 deletions

diff --git a/sys/lib/ghostscript/gs_dscp.ps b/sys/lib/ghostscript/gs_dscp.ps
new file mode 100755
index 000000000..f731f9682
--- /dev/null
+++ b/sys/lib/ghostscript/gs_dscp.ps
@@ -0,0 +1,118 @@
+%  Copyright (C) 2000 Artifex Software Inc.   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: gs_dscp.ps,v 1.6 2002/02/21 21:49:28 giles Exp $
+%  Postscript interface routines to DSC parser
+
+/send_orientation {			% <orientation> send_orientation -
+	% .parse_dsc_comments returns -1 for an Orientation key with an
+	% unrecognized value.
+  dup 0 ge {
+    << /Orientation 2 index >> setpagedevice
+  } if pop
+} bind def
+
+% This dictionary contains local handlers for DSC comments.
+% See header in zdscpars.c for more information.
+% <dsc_dict> handler <dsc_dict>
+/DSCparseprocs mark
+   /Orientation { dup /Orientation get send_orientation } bind
+   /PageOrientation { dup /PageOrientation .knownget { send_orientation }
+		      { dup /Orientation .knownget { send_orientation } if }
+		      ifelse } bind
+   /Page { dup /Orientation .knownget { send_orientation } if } bind
+   /NOP { } bind
+.dicttomark readonly def
+
+% This procedure is called whenever a DSC comment is found by the interpreter
+/do_parse_dsc false def
+/parse_dsc {				% <file> <DSC string> [<prev proc>]
+					%   parse_dsc -
+	% Run any previously installed parser.
+  0 get dup null eq { pop } { 3 copy exec pop } ifelse
+
+  do_parse_dsc {			% Check if this parser is enabled
+    currentglobal true setglobal	% Go to global VM, save old state
+    3 1 roll				% Put old VM state under <file> <string>
+    dsc_dict exch			% <VM state> <file> <dict> <string>
+    .parse_dsc_comments			% <VM state> <file> <dict> <DSC name>
+    4 -1 roll				% Get old VM state from under <file> <dict> <DSC name>
+    setglobal				% restore previous VM state
+    //DSCparseprocs exch .knownget {	% Check DSC name against local handler list
+      exec				% execute any local handler
+    } if
+  } if
+  pop pop				% remove file, dict
+} bind def
+
+
+% Check whether the currently installed parser is the one defined in this file.
+/.using_parse_dsc {			% - .using_parse_dsc <proc> <using?>
+  currentuserparams /ProcessDSCComment get
+  dup null eq { pop {{//null} //parse_dsc exec} } if
+  dup length 3 eq {
+    dup dup length 1 sub get /parse_dsc load eq
+  } {
+    false
+  } ifelse
+} bind def
+
+% Establish a binding for dsc_dict.
+userdict /dsc_dict null put
+
+% - dsc_init -
+/dsc_init {				% Initialize DSC parser
+  currentglobal true setglobal
+  /dsc_dict 50 dict store		% Size must be large enough for all DSC values
+  dsc_dict .initialize_dsc_parser
+  .using_parse_dsc {
+	% Already using this parser.
+    pop
+  } {
+	% Encapsulate the previous parser.  We know it is in global VM:
+	% allocate the new one in global VM as well.
+    1 array astore
+    /parse_dsc load /exec load 3 array astore cvx readonly
+    << /ProcessDSCComment 3 -1 roll >>
+    setuserparams
+  } ifelse
+  setglobal
+  /do_parse_dsc true def
+} bind def
+
+
+% Enable the DSC parser defined in this file.
+% - enable_dsc -
+/enable_dsc {
+  dsc_init
+} bind def
+
+% Disable the DSC parser defined in this file.
+% - disable_dsc -
+/disable_dsc {
+	% There might be another parser installed: if so, restore it.
+	% (If it has encapsulated our parser, we can't.)
+  .using_parse_dsc {
+	% Restore the parser we encapsulated.
+    0 get 0 get
+    currentglobal true setglobal exch
+    << /ProcessDSCComment 3 -1 roll >>
+    exch setglobal setuserparams
+  } {
+    pop
+  } ifelse
+	% If we couldn't restore the old parser, at least disable ours.
+  /do_parse_dsc false def
+} bind def