/usr/share/pyshared/pkpgpdls/lidil.py is in pkpgcounter 3.50-7.
This file is owned by root:root, with mode 0o644.
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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 95 96 97 98 99 100 101 102 103 104 | # -*- 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: lidil.py 374 2007-12-09 14:26:15Z jerome $
#
"""This modules implements a page counter for HP LIDIL format.
Documentation used :
hplip-2.7.10/prnt/ldl.py
hplip-2.7.10/prnt/hpijs/ldlencap.h
"""
import struct
import pdlparser
HEADERSIZE = 10 # LIDIL header is 10 bytes long
# Packet types taken from hplip-2.7.10/prnt/ldl.py
PACKET_TYPE_COMMAND = 0
PACKET_TYPE_DISABLE_PACING = 1
PACKET_TYPE_ENABLE_PACING = 2
PACKET_TYPE_RESUME_NORMAL_OPERATION = 3
PACKET_TYPE_DISABLE_RESPONSES = 4
PACKET_TYPE_ENABLE_RESPONSES = 5
PACKET_TYPE_RESET_LIDIL = 6
PACKET_TYPE_SYNC = 7
PACKET_TYPE_SYNC_COMPLETE = 8
# Command codes we are interested in.
LDL_LOAD_PAGE = 1
LDL_EJECT_PAGE = 2
class Parser(pdlparser.PDLParser) :
"""A parser for HP LIDIL documents."""
format = "Hewlett-Packard LIDIL"
def isValid(self) :
"""Returns True if data is LIDIL, else False."""
# Beginning Of File marker is a Sync packet, followed with
# a Sync Complete packet followed with a Reset packet.
# We just look at the start of the Sync packet for simplicity's sake.
BOFMarker = "$\x01\x00\x00\x07"
# End Of File marker is a Sync Complete packet followed
# with a Reset packet. We ignore the preceding Sync packet
# for simplicity's sake.
EOFMarker = "$\x00\x10\x00\x08\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff$$\x00\x10\x00\x06\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff$"
if self.firstblock.startswith(BOFMarker) \
and self.lastblock.endswith(EOFMarker) :
return True
else :
return False
def getJobSize(self) :
"""Computes the number of pages in a HP LIDIL document."""
unpack = struct.unpack
ejectpage = loadpage = 0
try :
while True :
header = self.infile.read(HEADERSIZE)
if not header :
break
if (len(header) != HEADERSIZE) or (header[0] != "$") :
# Invalid header or no Frame Sync byte.
raise pdlparser.PDLParserError, "This file doesn't seem to be valid Hewlett-Packard LIDIL datas."
(framesync,
cmdlength,
dummy,
packettype,
commandnumber,
referencenumber,
datalength) = unpack(">BHBBBHH", header)
if packettype == PACKET_TYPE_COMMAND :
if commandnumber == LDL_LOAD_PAGE :
loadpage += 1
elif commandnumber == LDL_EJECT_PAGE :
ejectpage += 1
self.infile.seek(cmdlength + datalength - len(header), 1) # relative seek
except struct.error :
raise pdlparser.PDLParserError, "This file doesn't seem to be valid Hewlett-Packard LIDIL datas."
# Number of page eject commands should be sufficient,
# but we never know : someone could try to cheat the printer
# by loading a page but not ejecting 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("Load : %i Eject : %i" % (loadpage, ejectpage))
return max(loadpage, ejectpage)
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