/usr/share/pyshared/pkpgpdls/tiff.py is in pkpgcounter 3.50-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | # -*- coding: ISO-8859-15 -*-
#
# pkpgcounter : a generic Page Description Language parser
#
# (c) 2003, 2004, 2005, 2006, 2007 Jerome Alet <alet@librelogiciel.com>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# $Id: tiff.py 374 2007-12-09 14:26:15Z jerome $
#
"""This modules implements a page counter for TIFF documents."""
import sys
import os
import mmap
from struct import unpack
import pdlparser
class Parser(pdlparser.PDLParser) :
"""A parser for TIFF documents."""
totiffcommands = [ 'cp "%(infname)s" "%(outfname)s"' ]
required = [ "cp" ]
format = "TIFF"
def isValid(self) :
"""Returns True if data is TIFF, else False."""
littleendian = (chr(0x49)*2) + chr(0x2a) + chr(0)
bigendian = (chr(0x4d)*2) + chr(0) + chr(0x2a)
if self.firstblock[:4] in (littleendian, bigendian) :
return True
else :
return False
def getJobSize(self) :
"""Counts pages in a TIFF document.
Algorithm by Jerome Alet.
The documentation used for this was :
http://www.ee.cooper.edu/courses/course_pages/past_courses/EE458/TIFF/
"""
infileno = self.infile.fileno()
minfile = mmap.mmap(infileno, os.fstat(infileno)[6], prot=mmap.PROT_READ, flags=mmap.MAP_SHARED)
pagecount = 0
littleendian = (chr(0x49)*2) + chr(0x2a) + chr(0)
bigendian = (chr(0x4d)*2) + chr(0) + chr(0x2a)
if minfile[:4] == littleendian :
integerbyteorder = "<I"
shortbyteorder = "<H"
elif minfile[:4] == bigendian :
integerbyteorder = ">I"
shortbyteorder = ">H"
else :
raise pdlparser.PDLParserError, "Unknown file endianness."
pos = 4
try :
try :
nextifdoffset = unpack(integerbyteorder, minfile[pos : pos + 4])[0]
while nextifdoffset :
direntrycount = unpack(shortbyteorder, minfile[nextifdoffset : nextifdoffset + 2])[0]
pos = nextifdoffset + 2 + (direntrycount * 12)
nextifdoffset = unpack(integerbyteorder, minfile[pos : pos + 4])[0]
pagecount += 1
except IndexError :
pass
finally :
minfile.close()
return pagecount
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