| Current File : //usr/share/ghostscript/lib/pphs.ps |
% Copyright (C) 2001-2019 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.
%
% Refer to licensing information at http://www.artifex.com or contact
% Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato,
% CA 94945, U.S.A., +1(415)492-9861, for further information.
%
% Print Linearized PDF hint streams
% Utilities
/read1 { % <file> read1 <value>
read not {
(**** Unexpected EOF) = flush quit
} if
} bind def
/read2 { % <file> read2 <value>
dup read1 8 bitshift exch read1 add
} bind def
/read4 { % <file> read4 <value>
dup read2 16 bitshift exch read2 add
} bind def
% Free variables: Bits, Bitsleft
/readninit { % - <readninit> -
/Bits 0 def
/Bitsleft 0 def
} bind def
/pdftoken { % <file> pdftoken <token>
dup token pop
dup type /nametype eq 1 index xcheck and {
dup dup (<<) cvn eq exch ([) eq or {
exec exch {
dup pdftoken dup dup (>>) cvn eq exch (]) eq or {
exch pop exec exit
} if exch
} loop
} {
exch pop
} ifelse
} {
exch pop
} ifelse
} bind def
/makemask { % <nbits> makemask <mask>
1 exch bitshift 1 sub
} bind def
/readn { % <file> <nbits> readn <value>
dup Bitsleft le {
exch pop
/Bitsleft Bitsleft 2 index sub def
makemask Bits Bitsleft neg bitshift and
} {
Bitsleft makemask Bits and
exch Bitsleft sub exch 1 index bitshift 3 1 roll
/Bits 2 index read1 def /Bitsleft 8 def
readn add
} ifelse
} bind def
/sread { % <string> sread <file>
0 () /SubFileDecode filter
} bind def
/ptag { % <pre-tag> <proc> <post-tag> ptag -
3 -1 roll print (: ) print
exch exec
( % ) print =
} bind def
% Print the linearization parameters dictionary.
/plpkeys <<
/E (end of p. 1 objects)
/L (total file length)
/H (PHS start + length)
/N (# of pages)
/O (p. 1 object #)
/T (offset of first main xref entry)
>> def
/plpdict { % <dict> plpdict -
(<<) = plpkeys {
2 index 2 index .knownget {
% Stack: dict key label value
( ) print 3 -1 roll ===only ( ) print ===only
( % ) print =
} {
pop pop
} ifelse
} forall {
plpkeys 2 index known {
pop pop
} {
( ) print exch ===only ( ) print ===
} ifelse
} forall (>>) =
} bind def
% Print the Page Offset Hint Table.
/ppoht { % <npages> <file> ppoht -
20 dict begin
/f exch def
/npages exch def
readninit
(1) { f read4 =only } (least # objs/page) ptag
(2) { f read4 =only } (offset of p. 1 object (+PHS length if beyond PHS)) ptag
(3) { f read2 dup =only /nb3 exch def } (# bits for # objs/page delta) ptag
(4) { f read4 =only } (least # bytes/page) ptag
(5) { f read2 dup =only /nb5 exch def } (# bits for # bytes/page delta) ptag
(6) { f read4 =only } (least content stream offset-in-page) ptag
(7) { f read2 dup =only /nb7 exch def } (# bits for content stream offset delta) ptag
(8) { f read4 =only } (least content stream length) ptag
(9) { f read2 dup =only /nb9 exch def } (# bits for content stream length delta) ptag
(10) { f read2 dup =only /nb10 exch def } (# bits for # of shared obj refs) ptag
(11) { f read2 dup =only /nb11 exch def } (# bits for shared obj indices) ptag
(12) { f read2 dup =only /nb12 exch def } (# bits for shared obj ref pos numerators) ptag
(13) { f read2 =only } (shared obj ref pos denominator) ptag
(*1) { [ npages { f nb3 readn } repeat ] ==only } (# objs/page deltas (see 1,3)) ptag
(*2) { [ npages { f nb5 readn } repeat ] ==only } (# bytes/page deltas (see 4,5)) ptag
(*3) { [ npages { f nb10 readn } repeat ] dup ==only /nso exch def } (# of shared obj refs (see 10)) ptag
(*4) { [ nso { [ exch { f nb11 readn } repeat ] } forall ] ==only } (shared obj indices (see 11)) ptag
(*5) { [ nso { [ exch { f nb12 readn } repeat ] } forall ] ==only } (shared obj ref pos numerators (see 12)) ptag
(*6) { [ npages { f nb7 readn } repeat ] ==only } (content stream offset-in-page deltas (see 6,7)) ptag
(*7) { [ npages { f nb9 readn } repeat ] ==only } (content stream length deltas (see 8,9)) ptag
end % temp dict
} bind def
% Print the Shared Objects Hint Table.
/psoht { % <file> psoht -
20 dict begin
/f exch def
readninit
(1) { f read4 =only } (first shared obj #) ptag
(2) { f read4 =only } (first shared obj offset (+PHS length if beyond PHS)) ptag
(3) { f read4 dup =only /n3 exch def } (# of p. 1 shared objs) ptag
(4) { f read4 dup =only /n4 exch def } (total # of shared objs) ptag
(5) { f read2 dup =only /nb5 exch def } (# bits for # of shared objs/group) ptag
(6) { f read4 =only } (least shared obj group length) ptag
(7) { f read2 dup =only /nb7 exch def } (# bits for shared obj group length delta) ptag
/nse n4 def
(*1) { [ nse { f nb7 readn } repeat ] ==only } (shared obj group length deltas (see 6,7)) ptag
(*2) { [ nse { f 1 readn } repeat ] dup ==only /md5s exch def } (MD5 present?) ptag
(*3:) = md5s {
0 ne {
( ) print f 16 string readstring pop
(%stdout) (w) file dup 3 -1 roll writehexstring closefile () =
} if
} forall
(*4) { [ nse { f nb5 readn } repeat ] ==only } (# objs/group (see 5)) ptag
end % temp dict
} bind def
% Print the Primary Hint Stream of a PDF file.
/pphs { % <file> pphs -
/pdf exch def
% Read the linearization parameter dictionary.
{ pdf pdftoken /obj eq { exit } if } loop
pdf pdftoken /lpdict exch def
/lpdict type /dicttype eq { lpdict /Linearized known } { false } ifelse {
(Not a linearized PDF file.) = stop
} if
lpdict plpdict flush
% Read the primary hint stream.
null {
pdf pdftoken dup /stream eq { pop exit } if
exch pop
} loop
/phsdict exch def
% Remove Length if indirect reference.
phsdict 0 known {
phsdict 0 undef phsdict /Length undef
} if
(PHS: ) print phsdict === flush
pdf 0 (endstream) /SubFileDecode filter
dup 64000 string readstring pop exch closefile
sread /phsdata exch def
% Decode the hint stream data if necessary.
phsdict /Filter .knownget {
phsdata exch filter
dup 5000 string readstring pop exch closefile
sread /phsdata exch def
} if
% Adobe says we can assume /P = 0.
(Page Offset Hint Table:) =
lpdict /N get
phsdata phsdict /S get string readstring pop sread
ppoht
(Shared Objects Hint Table:) =
phsdata psoht
} bind def
% Check for command line arguments.
[ .shellarguments
{ ] dup length 1 eq
{ 0 get (r) file dup pphs closefile }
{ (Usage: pphs filename.pdf\n) print flush }
ifelse
}
{ pop }
ifelse