ref: 3a77c01f43821dcc4f7cae54aff89bb20f2d95a5
dir: /sys/lib/ghostscript/pdfeof.ps/
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% $Id: pdfeof.ps,v 1.1 2000/03/09 08:40:40 lpd Exp $
% Patch to allow garbage on the end of PDF files.
.currentglobal true .setglobal
pdfdict begin
% Skip backward over the %%EOF at the end of the PDF file.
% We put this in a separate procedure so we can easily offer the option
% of accepting garbage after the %%EOF, which the PDF specification
% unambiguously forbids but which some applications (including, apparently,
% Acrobat Distiller on the Macintosh) produce, and of accepting the
% xref position on the same line as startxref.
/findxref { % - findxref <xrefpos>
PDFfile dup dup 0 setfileposition bytesavailable
dup /PDFfilelen exch def
% Find the last %%EOF string (within 2048 bytes)
2048 sub PDFoffset .max
2 copy setfileposition
PDFfilelen exch sub string 1 index exch readstring pop {
(\015%%EO) search { % Adobe can handle truncated key string
pop pop % if found, keep searching 'post' string
} {
(\012%%EO) search
{ pop pop } { exit } ifelse % exit if neither string found
} ifelse
} loop
PDFfilelen exch length sub 4 sub PDFoffset .max setfileposition
% Now read the startxref and xref start position.
prevline token not { null } if dup type /integertype eq {
exch pop cvi % xref start position
exch PDFfile exch setfileposition
prevline (startxref) linene { findxreferror } if
pop
} { % else, this file has 'startxref #####' format
(startxref) ne { findxreferror } if
cvi % xref start position
exch PDFfile exch setfileposition
} ifelse
} bind def
end % pdfdict
.setglobal