ref: 375ad2d3abef711985c51eea140281a092c34d49
dir: /sys/lib/ghostscript/gs_diskn.ps/
% Copyright (C) 1990, 2000 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_diskn.ps,v 1.5 2003/08/08 18:45:04 ray Exp $
% Initialization file for %disk device modifications
% When this is run, systemdict is still writable,
systemdict begin
% Collect the list of searchable IODevices in SearchOrder
% Efficiency here doesn't matter since we run this at the end
% of gs_init and convert it to a static array.
/.getsearchabledevs { % - .getsearchabledevs [ list_of_strings ]
//systemdict /.searchabledevs .knownget not {
.currentglobal true .setglobal
mark (*) {
dup length string copy dup currentdevparams /Searchable
.knownget { not { pop } if } { pop } ifelse
} 8192 string /IODevice resourceforall
]
% now process the array into correct SearchOrder
0 1 2 {
mark exch 2 index {
dup currentdevparams /SearchOrder get 2 index eq
{ exch } { pop } ifelse
} forall % devices on the old list
pop
% make the array and sort it by name
] { lt } bind .sort
exch
} for
% collect all devices with SearchOrder > 2
mark 2 index {
dup currentdevparams /SearchOrder get 2 gt
{ exch } { pop } ifelse
} forall
] exch pop
% We now have 4 arrays on the stack, SO=0 SO=1 SO=2 SO>2
% make them into a single array
mark 5 1 roll ] mark exch { { } forall } forall ]
//systemdict /.searchabledevs 2 index .forceput
exch .setglobal
}
if
} .bind executeonly def % must be bound and hidden for .forceput
% Modify .putdevparams to force regeneration of .searchabledevs list
/.putdevparams {
% We could be smarter and check for %disk* device, but this
% doesn't get run enough to justify the complication
//.putdevparams
//systemdict /.searchabledevs .forceundef
} .bind odef % must be bound and hidden for .forceundef
% ------ extend filenameforall to handle wildcards in %dev% part of pattern -------%
/filenameforall {
count 3 ge {
2 index (%) search {
pop pop
} {
% no device specified, so search them all
pop (*%) 3 index concatstrings
% we need to suppress the device when we return the string
% in order to match Adobe's behaviour with %disk devices.
4 -2 roll % the callers procedure
[ { (%) search { pop pop (%) search { pop pop } if } if } /exec load
4 -1 roll % the callers procedure
/exec load
] cvx
4 2 roll % put the modified procedure where it belongs
} ifelse
% extract device portion (up to end of string or next %)
(%) search { exch pop } if % stack: opat proc scratch npat device
dup (*) search { pop pop pop true } { pop false } ifelse
1 index (?) search { pop pop pop true } { pop false } ifelse
or not {
pop pop //filenameforall % device with no wildcard
} {
(%) concatstrings (%) exch concatstrings
.getsearchabledevs
% find all matching devices and add the rest of the search string
mark exch {
dup counttomark 1 add index .stringmatch {
counttomark 2 add index concatstrings
} {
pop
} ifelse
} forall
]
3 1 roll pop pop
4 -1 roll pop
% now we need to invoke filenameforall for each of the strings
% in the array. We do this by building a procedure that is like
% an unrolled 'forall' loop. We do this to get the parameters
% for each filenameforall, since each execution will pop its
% parameters, but we can't use the operand stack for storage
% since each invocation must have the same operand stack.
mark exch {
counttomark dup 3 add index exch
2 add index
/filenameforall load
} forall
] cvx
3 1 roll pop pop
exec % run our unrolled loop
}
ifelse
} {
//filenameforall % not enough parameters -- just let it fail
}
ifelse
} odef
% redefine file to search all devices in order
/file {
dup 0 get (r) 0 get eq dup {
pop false % success code
2 index 0 get 37 eq { [ () ] } { .getsearchabledevs } ifelse
{ 3 index concatstrings % prepend the device
{
2 index //file } .internalstopped not {
4 1 roll pop pop pop true
exit % exit with success
} {
pop pop
}
ifelse
}
forall
}
if
not { % just let standard file operator handle things
//file
}
if
} bind odef
% redefine deletefile to search all devices in order
/deletefile {
false % success code
1 index 0 get 37 eq { [ () ] } { .getsearchabledevs } ifelse
{ 2 index concatstrings % prepend the device
{ //deletefile } .internalstopped exch pop not {
pop true exit % exit with success
}
if
}
forall
not { $error /errorname get /deletefile exch signalerror } if
} bind odef
% redefine status to search all devices in order
/status {
dup type /stringtype eq {
false % success code
1 index 0 get 37 eq { [ () ] } { .getsearchabledevs } ifelse
{ 2 index concatstrings % prepend the device
{ //status } .internalstopped not {
{ true 7 -2 roll pop pop true exit } % exit with success
if
}
if
}
forall
% If we made it this far, no devices were found to status the file
% clean up to return 'false'
exch pop
} {
//status
}
ifelse
} bind odef
% Also redefine renamefile to search all devices in order
/renamefile {
false % success code
2 index 0 get 37 eq { [ () ] } { .getsearchabledevs } ifelse
{ dup 4 index concatstrings % prepend the device
{ (r) //file } .internalstopped
not {
closefile exch pop true exit % exit with success
} {
pop pop
} ifelse
}
forall
not { $error /errorname get /renamefile exch signalerror } if
3 -1 roll concatstrings exch
//renamefile
} bind odef
% redefine devforall to process devices in numeric order
% Spec's for 'devforall' are unclear, but font downloaders may expect this
/devforall { % <proc> <scratch> devforall -
[ { dup length string copy } 2 index //devforall ]
% stack: proc scratch array_of_device_names
{ lt } .sort
% We don't really invoke the procedure with the scratch string
% but rather with the strings from our array
exch pop exch forall
} odef
end % systemdict