222 lines
6.8 KiB
PostScript
222 lines
6.8 KiB
PostScript
% Copyright (C) 2001 Aladdin Enterprises. All rights reserved.
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%
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% This software is provided AS-IS with no warranty, either express or
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% implied.
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%
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% This software is distributed under license and may not be copied,
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% modified or distributed except as expressly authorized under the terms
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% of the license contained in the file LICENSE in this distribution.
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%
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% For more information about licensing, please refer to
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% http://www.ghostscript.com/licensing/. For information on
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% commercial licensing, go to http://www.artifex.com/licensing/ or
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% contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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% San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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% $Id: pphs.ps,v 1.6 2003/08/08 18:45:05 ray Exp $
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% Print Linearized PDF hint streams
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% Utilities
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/read1 { % <file> read1 <value>
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read not {
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(**** Unexpected EOF) = flush quit
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} if
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} bind def
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/read2 { % <file> read2 <value>
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dup read1 8 bitshift exch read1 add
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} bind def
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/read4 { % <file> read4 <value>
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dup read2 16 bitshift exch read2 add
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} bind def
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% Free variables: Bits, Bitsleft
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/readninit { % - <readninit> -
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/Bits 0 def
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/Bitsleft 0 def
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} bind def
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/pdftoken { % <file> pdftoken <token>
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dup token pop
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dup type /nametype eq 1 index xcheck and {
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dup dup (<<) cvn eq exch ([) eq or {
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exec exch {
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dup pdftoken dup dup (>>) cvn eq exch (]) eq or {
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exch pop exec exit
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} if exch
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} loop
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} {
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exch pop
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} ifelse
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} {
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exch pop
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} ifelse
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} bind def
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/makemask { % <nbits> makemask <mask>
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1 exch bitshift 1 sub
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} bind def
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/readn { % <file> <nbits> readn <value>
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dup Bitsleft le {
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exch pop
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/Bitsleft Bitsleft 2 index sub def
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makemask Bits Bitsleft neg bitshift and
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} {
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Bitsleft makemask Bits and
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exch Bitsleft sub exch 1 index bitshift 3 1 roll
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/Bits 2 index read1 def /Bitsleft 8 def
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readn add
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} ifelse
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} bind def
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/sread { % <string> sread <file>
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0 () /SubFileDecode filter
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} bind def
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/ptag { % <pre-tag> <proc> <post-tag> ptag -
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3 -1 roll print (: ) print
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exch exec
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( % ) print =
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} bind def
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% Print the linearization parameters dictionary.
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/plpkeys <<
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/E (end of p. 1 objects)
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/L (total file length)
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/H (PHS start + length)
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/N (# of pages)
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/O (p. 1 object #)
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/T (offset of first main xref entry)
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>> def
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/plpdict { % <dict> plpdict -
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(<<) = plpkeys {
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2 index 2 index .knownget {
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% Stack: dict key label value
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( ) print 3 -1 roll ===only ( ) print ===only
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( % ) print =
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} {
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pop pop
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} ifelse
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} forall {
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plpkeys 2 index known {
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pop pop
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} {
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( ) print exch ===only ( ) print ===
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} ifelse
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} forall (>>) =
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} bind def
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% Print the Page Offset Hint Table.
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/ppoht { % <npages> <file> ppoht -
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20 dict begin
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/f exch def
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/npages exch def
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readninit
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(1) { f read4 =only } (least # objs/page) ptag
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(2) { f read4 =only } (offset of p. 1 object (+PHS length if beyond PHS)) ptag
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(3) { f read2 dup =only /nb3 exch def } (# bits for # objs/page delta) ptag
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(4) { f read4 =only } (least # bytes/page) ptag
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(5) { f read2 dup =only /nb5 exch def } (# bits for # bytes/page delta) ptag
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(6) { f read4 =only } (least content stream offset-in-page) ptag
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(7) { f read2 dup =only /nb7 exch def } (# bits for content stream offset delta) ptag
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(8) { f read4 =only } (least content stream length) ptag
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(9) { f read2 dup =only /nb9 exch def } (# bits for content stream length delta) ptag
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(10) { f read2 dup =only /nb10 exch def } (# bits for # of shared obj refs) ptag
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(11) { f read2 dup =only /nb11 exch def } (# bits for shared obj indices) ptag
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(12) { f read2 dup =only /nb12 exch def } (# bits for shared obj ref pos numerators) ptag
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(13) { f read2 =only } (shared obj ref pos denominator) ptag
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(*1) { [ npages { f nb3 readn } repeat ] ==only } (# objs/page deltas (see 1,3)) ptag
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(*2) { [ npages { f nb5 readn } repeat ] ==only } (# bytes/page deltas (see 4,5)) ptag
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(*3) { [ npages { f nb10 readn } repeat ] dup ==only /nso exch def } (# of shared obj refs (see 10)) ptag
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(*4) { [ nso { [ exch { f nb11 readn } repeat ] } forall ] ==only } (shared obj indices (see 11)) ptag
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(*5) { [ nso { [ exch { f nb12 readn } repeat ] } forall ] ==only } (shared obj ref pos numerators (see 12)) ptag
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(*6) { [ npages { f nb7 readn } repeat ] ==only } (content stream offset-in-page deltas (see 6,7)) ptag
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(*7) { [ npages { f nb9 readn } repeat ] ==only } (content stream length deltas (see 8,9)) ptag
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end % temp dict
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} bind def
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% Print the Shared Objects Hint Table.
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/psoht { % <file> psoht -
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20 dict begin
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/f exch def
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readninit
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(1) { f read4 =only } (first shared obj #) ptag
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(2) { f read4 =only } (first shared obj offset (+PHS length if beyond PHS)) ptag
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(3) { f read4 dup =only /n3 exch def } (# of p. 1 shared objs) ptag
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(4) { f read4 dup =only /n4 exch def } (total # of shared objs) ptag
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(5) { f read2 dup =only /nb5 exch def } (# bits for # of shared objs/group) ptag
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(6) { f read4 =only } (least shared obj group length) ptag
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(7) { f read2 dup =only /nb7 exch def } (# bits for shared obj group length delta) ptag
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/nse n4 def
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(*1) { [ nse { f nb7 readn } repeat ] ==only } (shared obj group length deltas (see 6,7)) ptag
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(*2) { [ nse { f 1 readn } repeat ] dup ==only /md5s exch def } (MD5 present?) ptag
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(*3:) = md5s {
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0 ne {
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( ) print f 16 string readstring pop
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(%stdout) (w) file dup 3 -1 roll writehexstring closefile () =
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} if
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} forall
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(*4) { [ nse { f nb5 readn } repeat ] ==only } (# objs/group (see 5)) ptag
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end % temp dict
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} bind def
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% Print the Primary Hint Stream of a PDF file.
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/pphs { % <file> pphs -
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/pdf exch def
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% Read the linearization parameter dictionary.
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{ pdf pdftoken /obj eq { exit } if } loop
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pdf pdftoken /lpdict exch def
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/lpdict type /dicttype eq { lpdict /Linearized known } { false } ifelse {
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(Not a linearized PDF file.) = stop
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} if
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lpdict plpdict flush
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% Read the primary hint stream.
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null {
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pdf pdftoken dup /stream eq { pop exit } if
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exch pop
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} loop
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/phsdict exch def
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% Remove Length if indirect reference.
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phsdict 0 known {
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phsdict 0 undef phsdict /Length undef
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} if
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(PHS: ) print phsdict === flush
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pdf 0 (endstream) /SubFileDecode filter
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dup 64000 string readstring pop exch closefile
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sread /phsdata exch def
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% Decode the hint stream data if necessary.
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phsdict /Filter .knownget {
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phsdata exch filter
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dup 5000 string readstring pop exch closefile
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sread /phsdata exch def
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} if
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% Adobe says we can assume /P = 0.
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(Page Offset Hint Table:) =
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lpdict /N get
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phsdata phsdict /S get string readstring pop sread
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ppoht
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(Shared Objects Hint Table:) =
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phsdata psoht
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} bind def
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% Check for command line arguments.
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[ shellarguments
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{ ] dup length 1 eq
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{ 0 get (r) file dup pphs closefile }
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{ (Usage: pphs filename.pdf\n) print flush }
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ifelse
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}
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{ pop }
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ifelse
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