/usr/share/pyshared/pkpgpdls/zjstream.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 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | # -*- 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: zjstream.py 374 2007-12-09 14:26:15Z jerome $
#
"""This modules implements a page counter for ZjStream documents."""
import struct
import pdlparser
class Parser(pdlparser.PDLParser) :
"""A parser for ZjStream documents."""
def isValid(self) :
"""Returns True if data is ZjStream, else False."""
if self.firstblock[:4] == "ZJZJ" :
self.format = "Zenographics ZjStream (little endian)"
return self.littleEndian()
elif self.firstblock[:4] == "JZJZ" :
self.format = "Zenographics ZjStream (big endian)"
return self.bigEndian()
else :
return False
def littleEndian(self) :
"""Toggles to little endianness."""
self.unpackHeader = "<IIIHH"
return True
def bigEndian(self) :
"""Toggles to big endianness."""
self.unpackHeader = ">IIIHH"
return True
def getJobSize(self) :
"""Computes the number of pages in a ZjStream document."""
self.infile.seek(4, 0) # Skip ZJZJ/JZJZ header
startpagecount = endpagecount = 0
unpackHeader = self.unpackHeader
unpack = struct.unpack
try :
while True :
header = self.infile.read(16)
if not header :
break
(totalChunkSize,
chunkType,
numberOfItems,
reserved,
signature) = unpack(unpackHeader, header)
self.infile.seek(totalChunkSize - len(header), 1)
if chunkType == 2 :
#self.logdebug("startPage")
startpagecount += 1
elif chunkType == 3 :
#self.logdebug("endPage")
endpagecount += 1
#elif chunkType == 0 :
# self.logdebug("startDoc")
#elif chunkType == 1 :
# self.logdebug("endDoc")
#
#self.logdebug("Chunk size : %s" % totalChunkSize)
#self.logdebug("Chunk type : 0x%08x" % chunkType)
#self.logdebug("# items : %s" % numberOfItems)
#self.logdebug("reserved : 0x%04x" % reserved)
#self.logdebug("signature : 0x%04x" % signature)
#self.logdebug("\n")
except struct.error :
raise pdlparser.PDLParserError, "This file doesn't seem to be valid ZjStream datas."
# Number of endpage commands should be sufficient,
# but we never know : someone could try to cheat the printer
# by starting a page but not ending it, and ejecting it manually
# later on. Not sure if the printers would support this, but
# taking the max value works around the problem in any case.
self.logdebug("StartPage : %i EndPage : %i" % (startpagecount, endpagecount))
return max(startpagecount, endpagecount)
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