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+% Copyright (C) 1994, 1996, 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: gs_cmdl.ps 6300 2005-12-28 19:56:24Z giles $
+% Parse and execute the command line.
+% C code handles the following switches: -h/-? -I -M -v
+
+/cmddict 50 dict def
+cmddict begin
+
+% ---------------- Utility procedures ---------------- %
+
+% Get the next argument from the parsed argument list.
+/nextarg % - nextarg <arg> true
+ % - nextarg false
+ { argv length 0 eq
+ { false }
+ { argv dup 0 get exch dup length 1 sub 1 exch getinterval /argv exch def }
+ ifelse
+ } bind def
+
+% Run a file, under job control if implemented.
+/runjob % <file> runjob -
+ { end % cmddict
+ /startjob where { pop false () startjob pop }
+ run
+ //cmddict begin
+ } bind def
+/runfilejob % <filename> runfilejob -
+ { findlibfile { exch pop } { (r) file } runjob
+ } bind def
+
+% Expand arguments. Free variables: expand@.
+/expandarg % <string> expandarg <args...>
+ { dup () eq
+ { pop
+ }
+ { dup dup (--) eq exch (-+) eq or
+ { pop /expand@ false def
+ }
+ { expand@ { (@) anchorsearch } { false } ifelse
+ { pop findlibfile
+ { exch pop }
+ { (r) file } % let the error happen
+ expandargfile
+ }
+ if
+ }
+ ifelse
+ }
+ } bind def
+/expandargfile % <file> expandargfile <args...>
+ { [ exch cvlit
+ { token not { exit } if
+ dup type /stringtype ne { =string cvs dup length string copy } if
+ expandarg
+ }
+ /exec cvx
+ ] cvx loop
+ } bind def
+
+% ---------------- Recognized switches ---------------- %
+
+% Switches with arguments are defined as <x>;
+% switches without arguments are defined as -<x>.
+
+% Switches without arguments
+/--
+ { nextarg not
+ { (-- and -+ require a file name.) = flush }
+ { //systemdict /ARGUMENTS argv put /argv [] def runjob }
+ ifelse
+ } bind def
+/-+ /-- load def
+/-@ /-- load def
+/-A { (@) Z } bind def
+/-c
+ { { argv length 0 eq { exit } if
+ argv 0 get (-) anchorsearch { pop pop exit } if
+ pop nextarg token
+ { exch pop % Probably should check for empty.
+ end exec //cmddict begin
+ }
+ if
+ }
+ loop
+ } bind def
+/-e { (#) Z } bind def
+/-E /-e load def
+/-f { } def
+/-q { //systemdict /QUIET true put } bind def
+
+% Switches with arguments
+/d
+ { (=) search not { (#) search not { () exch dup } if } if
+ exch pop cvn dup where
+ { pop (Redefining ) print print ( is not allowed.) = flush pop }
+ { exch token
+ { exch pop } % Probably should check for empty.
+ { true }
+ ifelse
+ //systemdict 3 1 roll put
+ }
+ ifelse
+ } bind def
+/D /d load def
+/f { dup length 0 ne { runfilejob } if } bind def
+/g
+ { (x) search { cvi pop exch cvi } { cvi dup } ifelse
+ //systemdict begin /DEVICEHEIGHT exch def /DEVICEWIDTH exch def end
+ } bind def
+/r
+ { (x) search { cvr pop exch cvr } { cvr dup } ifelse
+ //systemdict begin /DEVICEYRESOLUTION exch def /DEVICEXRESOLUTION exch def end
+ } bind def
+/s
+ { (=) search not { (#) search not { () exch dup } if } if
+ exch pop cvn dup where { pop dup load } { () } ifelse
+ type /stringtype ne
+ { (Redefining ) print print ( is not allowed.) = flush pop }
+ { exch //systemdict 3 1 roll put }
+ ifelse
+ } bind def
+/S /s load def
+/Z { true .setdebug } bind def
+
+% ---------------- Main program ---------------- %
+
+% We process the command line in two passes. In the first pass,
+% we read and expand any @-files as necessary. The second pass
+% does the real work.
+
+/cmdstart
+ { //cmddict begin
+ /expand@ true def
+ [
+ % Process the GS_OPTIONS environment variable.
+ (GS_OPTIONS) getenv { 0 () /SubFileDecode filter expandargfile } if
+ % Process the actual command line.
+ .getargv { expandarg } forall
+ ] readonly /argv exch def
+ % Now interpret the commands.
+ { nextarg not { exit } if
+ dup 0 get (-) 0 get eq
+ { dup length 1 eq
+ { pop (%stdin) (r) file runjob
+ }
+ { dup length 2 gt
+ { dup dup length 2 sub 2 exch getinterval exch 1 1 getinterval }
+ if currentdict .knownget
+ { exec
+ }
+ { (Ignoring unknown switch ) print
+ dup length 1 eq { (-) print print } if print
+ () = flush
+ }
+ ifelse
+ }
+ ifelse
+ }
+ { runfilejob
+ }
+ ifelse
+ }
+ loop end
+ } bind def
+
+end % cmddict