[1482] | 1 | # PyKota |
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| 2 | # -*- coding: ISO-8859-15 -*- |
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| 3 | # |
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| 4 | # PyKota - Print Quotas for CUPS and LPRng |
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| 5 | # |
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| 6 | # (c) 2003-2004 Jerome Alet <alet@librelogiciel.com> |
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| 7 | # This program is free software; you can redistribute it and/or modify |
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| 8 | # it under the terms of the GNU General Public License as published by |
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| 9 | # the Free Software Foundation; either version 2 of the License, or |
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| 10 | # (at your option) any later version. |
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| 11 | # |
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| 12 | # This program is distributed in the hope that it will be useful, |
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| 13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | # GNU General Public License for more details. |
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| 16 | # |
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| 17 | # You should have received a copy of the GNU General Public License |
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| 18 | # along with this program; if not, write to the Free Software |
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| 19 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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| 20 | # |
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| 21 | # $Id$ |
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| 22 | # |
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| 23 | # $Log$ |
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[1543] | 24 | # Revision 1.4 2004/06/18 06:16:14 jalet |
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| 25 | # Fixes PostScript detection code for incorrect drivers |
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| 26 | # |
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[1487] | 27 | # Revision 1.3 2004/05/21 20:40:08 jalet |
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| 28 | # All the code for pkpgcounter is now in pdlanalyzer.py |
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| 29 | # |
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[1485] | 30 | # Revision 1.2 2004/05/19 19:09:36 jalet |
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| 31 | # Speed improvement |
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| 32 | # |
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[1482] | 33 | # Revision 1.1 2004/05/18 09:59:54 jalet |
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| 34 | # pkpgcounter is now just a wrapper around the PDLAnalyzer class |
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| 35 | # |
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| 36 | # |
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| 37 | # |
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| 38 | |
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| 39 | import sys |
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| 40 | import struct |
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| 41 | import tempfile |
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| 42 | |
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[1487] | 43 | KILOBYTE = 1024 |
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| 44 | MEGABYTE = 1024 * KILOBYTE |
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| 45 | |
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| 46 | class PDLAnalyzerError(Exception): |
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| 47 | """An exception for PDL Analyzer related stuff.""" |
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| 48 | def __init__(self, message = ""): |
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| 49 | self.message = message |
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| 50 | Exception.__init__(self, message) |
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| 51 | def __repr__(self): |
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| 52 | return self.message |
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| 53 | __str__ = __repr__ |
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| 54 | |
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[1482] | 55 | class PostScriptAnalyzer : |
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| 56 | def __init__(self, infile) : |
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| 57 | """Initialize PostScript Analyzer.""" |
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| 58 | self.infile = infile |
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| 59 | |
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| 60 | def getJobSize(self) : |
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| 61 | """Count pages in a DSC compliant PostScript document.""" |
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| 62 | pagecount = 0 |
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| 63 | while 1 : |
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| 64 | line = self.infile.readline() |
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| 65 | if not line : |
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| 66 | break |
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| 67 | if line.startswith("%%Page: ") : |
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| 68 | pagecount += 1 |
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| 69 | return pagecount |
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| 70 | |
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| 71 | class PCLAnalyzer : |
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| 72 | def __init__(self, infile) : |
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| 73 | """Initialize PCL Analyzer.""" |
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| 74 | self.infile = infile |
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| 75 | |
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[1485] | 76 | def skip(self, nb) : |
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| 77 | """Reads a new datablock.""" |
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| 78 | newpos = self.pos + nb |
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| 79 | if newpos >= self.len : |
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| 80 | oldlen = self.len |
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[1487] | 81 | self.data = self.infile.read(MEGABYTE) |
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[1485] | 82 | self.len = len(self.data) |
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| 83 | if not self.len : |
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| 84 | return |
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| 85 | self.pos = newpos - oldlen |
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| 86 | else : |
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| 87 | self.pos = newpos |
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| 88 | |
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| 89 | def readone(self) : |
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| 90 | """Reads a new byte.""" |
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| 91 | if self.pos < self.len : |
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| 92 | char = self.data[self.pos] |
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| 93 | else : |
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[1487] | 94 | self.data = self.infile.read(MEGABYTE) |
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[1485] | 95 | self.len = len(self.data) |
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| 96 | self.pos = 0 |
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| 97 | if not self.len : |
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| 98 | return |
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| 99 | char = self.data[0] |
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| 100 | self.pos += 1 |
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| 101 | return char |
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| 102 | |
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[1482] | 103 | def getJobSize(self) : |
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| 104 | """Count pages in a PCL5 document.""" |
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| 105 | # |
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| 106 | # Algorithm from pclcount |
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| 107 | # (c) 2003, by Eduardo Gielamo Oliveira & Rodolfo Broco Manin |
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| 108 | # published under the terms of the GNU General Public Licence v2. |
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| 109 | # |
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| 110 | # Backported from C to Python by Jerome Alet, then enhanced |
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| 111 | # with more PCL tags detected. I think all the necessary PCL tags |
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| 112 | # are recognized to correctly handle PCL5 files wrt their number |
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| 113 | # of pages. The documentation used for this was : |
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| 114 | # |
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| 115 | # HP PCL/PJL Reference Set |
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| 116 | # PCL5 Printer Language Technical Quick Reference Guide |
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| 117 | # http://h20000.www2.hp.com/bc/docs/support/SupportManual/bpl13205/bpl13205.pdf |
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| 118 | # |
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| 119 | tagsends = { "&n" : "W", |
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| 120 | "&b" : "W", |
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| 121 | "*i" : "W", |
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| 122 | "*l" : "W", |
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| 123 | "*m" : "W", |
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| 124 | "*v" : "W", |
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| 125 | "*c" : "W", |
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| 126 | "(f" : "W", |
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| 127 | "*b" : "VW", |
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| 128 | "(s" : "W", |
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| 129 | ")s" : "W", |
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| 130 | "&p" : "X", |
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| 131 | "&l" : "X" } |
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[1485] | 132 | self.data = [] |
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| 133 | self.pos = self.len = 0 |
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[1482] | 134 | copies = 1 |
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| 135 | pagecount = resets = 0 |
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| 136 | tag = None |
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| 137 | while 1 : |
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[1485] | 138 | char = self.readone() |
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[1482] | 139 | if not char : # EOF ? |
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| 140 | break |
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| 141 | if char == "\014" : |
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| 142 | pagecount += 1 |
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| 143 | elif char == "\033" : |
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| 144 | # |
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| 145 | # <ESC>*b###W -> Start of a raster data row/block |
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| 146 | # <ESC>*b###V -> Start of a raster data plane |
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| 147 | # <ESC>*c###W -> Start of a user defined pattern |
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| 148 | # <ESC>*i###W -> Start of a viewing illuminant block |
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| 149 | # <ESC>*l###W -> Start of a color lookup table |
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| 150 | # <ESC>*m###W -> Start of a download dither matrix block |
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| 151 | # <ESC>*v###W -> Start of a configure image data block |
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| 152 | # <ESC>(s###W -> Start of a characters description block |
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| 153 | # <ESC>)s###W -> Start of a fonts description block |
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| 154 | # <ESC>(f###W -> Start of a symbol set block |
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| 155 | # <ESC>&b###W -> Start of configuration data block |
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| 156 | # <ESC>&l###X -> Number of copies |
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| 157 | # <ESC>&n###W -> Starts an alphanumeric string ID block |
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| 158 | # <ESC>&p###X -> Start of a non printable characters block |
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| 159 | # |
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[1485] | 160 | tagstart = self.readone() |
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[1482] | 161 | if tagstart in "E9=YZ" : # one byte PCL tag |
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| 162 | if tagstart == "E" : |
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| 163 | resets += 1 |
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| 164 | continue # skip to next tag |
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[1485] | 165 | tag = tagstart + self.readone() |
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[1482] | 166 | try : |
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| 167 | tagend = tagsends[tag] |
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| 168 | except KeyError : |
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| 169 | pass # Unsupported PCL tag |
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| 170 | else : |
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| 171 | # Now read the numeric argument |
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| 172 | size = 0 |
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| 173 | while 1 : |
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[1485] | 174 | char = self.readone() |
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[1482] | 175 | if not char.isdigit() : |
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| 176 | break |
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| 177 | size = (size * 10) + int(char) |
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| 178 | if char in tagend : |
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| 179 | if tag == "&l" : |
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| 180 | copies = size |
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| 181 | else : |
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| 182 | # doing a read will prevent the seek |
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| 183 | # for unseekable streams. |
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| 184 | # we just ignore the block anyway. |
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| 185 | if tag == "&n" : |
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| 186 | # we have to take care of the operation id byte |
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| 187 | # which is before the string itself |
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| 188 | size += 1 |
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[1485] | 189 | self.skip(size) |
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[1482] | 190 | |
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| 191 | # if pagecount is still 0, we will return the number |
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| 192 | # of resets instead of the number of form feed characters. |
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| 193 | # but the number of resets is always at least 2 with a valid |
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| 194 | # pcl file : one at the very start and one at the very end |
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| 195 | # of the job's data. So we substract 2 from the number of |
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| 196 | # resets. And since on our test data we needed to substract |
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| 197 | # 1 more, we finally substract 3, and will test several |
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| 198 | # PCL files with this. If resets < 2, then the file is |
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| 199 | # probably not a valid PCL file, so we return 0 |
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[1487] | 200 | return copies * (pagecount or ((resets - 3) * (resets > 2))) |
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[1482] | 201 | |
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| 202 | class PCLXLAnalyzer : |
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| 203 | def __init__(self, infile) : |
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| 204 | """Initialize PCLXL Analyzer.""" |
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[1487] | 205 | raise PDLAnalyzerError, "PCLXL (aka PCL6) is not supported yet." |
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[1482] | 206 | self.infile = infile |
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| 207 | self.islittleendian = None |
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| 208 | found = 0 |
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| 209 | while not found : |
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| 210 | line = self.infile.readline() |
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| 211 | if not line : |
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| 212 | break |
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| 213 | if line[1:12] == " HP-PCL XL;" : |
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| 214 | found = 1 |
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| 215 | if line[0] == ")" : |
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| 216 | self.littleendian() |
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| 217 | elif line[0] == "(" : |
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| 218 | self.bigendian() |
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| 219 | if not found : |
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[1487] | 220 | raise PDLAnalyzerError, "This file doesn't seem to be PCLXL (aka PCL6)" |
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[1482] | 221 | else : |
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[1487] | 222 | self.tags = [lambda: None] * 256 |
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[1482] | 223 | self.tags[0x28] = self.bigendian # big endian |
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| 224 | self.tags[0x29] = self.littleendian # big endian |
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| 225 | self.tags[0x43] = self.beginPage # BeginPage |
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| 226 | self.tags[0x44] = self.endPage # EndPage |
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| 227 | |
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[1487] | 228 | self.tags[0xc0] = lambda: 1 # ubyte |
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| 229 | self.tags[0xc1] = lambda: 2 # uint16 |
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| 230 | self.tags[0xc2] = lambda: 4 # uint32 |
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| 231 | self.tags[0xc3] = lambda: 2 # sint16 |
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| 232 | self.tags[0xc4] = lambda: 4 # sint32 |
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| 233 | self.tags[0xc5] = lambda: 4 # real32 |
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[1482] | 234 | |
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| 235 | self.tags[0xc8] = self.array_8 # ubyte_array |
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| 236 | self.tags[0xc9] = self.array_16 # uint16_array |
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| 237 | self.tags[0xca] = self.array_32 # uint32_array |
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| 238 | self.tags[0xcb] = self.array_16 # sint16_array |
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| 239 | self.tags[0xcc] = self.array_32 # sint32_array |
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| 240 | self.tags[0xcd] = self.array_32 # real32_array |
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| 241 | |
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[1487] | 242 | self.tags[0xd0] = lambda: 2 # ubyte_xy |
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| 243 | self.tags[0xd1] = lambda: 4 # uint16_xy |
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| 244 | self.tags[0xd2] = lambda: 8 # uint32_xy |
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| 245 | self.tags[0xd3] = lambda: 4 # sint16_xy |
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| 246 | self.tags[0xd4] = lambda: 8 # sint32_xy |
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| 247 | self.tags[0xd5] = lambda: 8 # real32_xy |
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[1482] | 248 | |
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[1487] | 249 | self.tags[0xd0] = lambda: 4 # ubyte_box |
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| 250 | self.tags[0xd1] = lambda: 8 # uint16_box |
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| 251 | self.tags[0xd2] = lambda: 16 # uint32_box |
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| 252 | self.tags[0xd3] = lambda: 8 # sint16_box |
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| 253 | self.tags[0xd4] = lambda: 16 # sint32_box |
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| 254 | self.tags[0xd5] = lambda: 16 # real32_box |
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[1482] | 255 | |
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[1487] | 256 | self.tags[0xf8] = lambda: 1 # attr_ubyte |
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| 257 | self.tags[0xf9] = lambda: 2 # attr_uint16 |
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[1482] | 258 | |
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| 259 | self.tags[0xfa] = self.embeddedData # dataLength |
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| 260 | self.tags[0xfb] = self.embeddedDataSmall # dataLengthByte |
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| 261 | |
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| 262 | def debug(self, msg) : |
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| 263 | """Outputs a debug message on stderr.""" |
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| 264 | sys.stderr.write("%s\n" % msg) |
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| 265 | sys.stderr.flush() |
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| 266 | |
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| 267 | def beginPage(self) : |
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| 268 | """Indicates the beginning of a new page.""" |
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| 269 | self.pagecount += 1 |
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| 270 | self.debug("Begin page %i at %s" % (self.pagecount, self.infile.tell())) |
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| 271 | |
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| 272 | def endPage(self) : |
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| 273 | """Indicates the end of a page.""" |
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| 274 | self.debug("End page %i at %s" % (self.pagecount, self.infile.tell())) |
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| 275 | |
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| 276 | def handleArray(self, itemsize) : |
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| 277 | """Handles arrays.""" |
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[1487] | 278 | pos = self.infile.tell() |
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[1482] | 279 | datatype = self.infile.read(1) |
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[1487] | 280 | length = self.tags[ord(datatype)]() |
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| 281 | if length is None : |
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| 282 | self.debug("Bogus array length at %s" % pos) |
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[1482] | 283 | else : |
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[1487] | 284 | sarraysize = self.infile.read(length) |
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| 285 | if self.islittleendian : |
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| 286 | fmt = "<" |
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| 287 | else : |
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| 288 | fmt = ">" |
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| 289 | if length == 1 : |
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| 290 | fmt += "B" |
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| 291 | elif length == 2 : |
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| 292 | fmt += "H" |
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| 293 | elif length == 4 : |
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| 294 | fmt += "I" |
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| 295 | else : |
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| 296 | raise PDLAnalyzerError, "Error on array size at %s" % self.infile.tell() |
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| 297 | arraysize = struct.unpack(fmt, sarraysize)[0] |
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| 298 | self.debug("Array at %s, itemsize %s, datatype 0x%02x, size %s" % (pos, itemsize, ord(datatype), arraysize)) |
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| 299 | return arraysize * itemsize |
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[1482] | 300 | |
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| 301 | def array_8(self) : |
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| 302 | """Handles byte arrays.""" |
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| 303 | return self.handleArray(1) |
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| 304 | |
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| 305 | def array_16(self) : |
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| 306 | """Handles byte arrays.""" |
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| 307 | return self.handleArray(2) |
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| 308 | |
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| 309 | def array_32(self) : |
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| 310 | """Handles byte arrays.""" |
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| 311 | return self.handleArray(4) |
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| 312 | |
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| 313 | def embeddedDataSmall(self) : |
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| 314 | """Handle small amounts of data.""" |
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[1487] | 315 | pos = self.infile.tell() |
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| 316 | val = ord(self.infile.read(1)) |
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| 317 | self.debug("smalldatablock at %s (0x%02x)" % (pos, val)) |
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| 318 | return val |
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[1482] | 319 | |
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| 320 | def embeddedData(self) : |
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| 321 | """Handle normal amounts of data.""" |
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| 322 | if self.islittleendian : |
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| 323 | fmt = "<I" |
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| 324 | else : |
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| 325 | fmt = ">I" |
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[1487] | 326 | pos = self.infile.tell() |
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| 327 | val = struct.unpack(fmt, self.infile.read(4))[0] |
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| 328 | self.debug("datablock at %s (0x%08x)" % (pos, val)) |
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| 329 | return val |
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[1482] | 330 | |
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| 331 | def littleendian(self) : |
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| 332 | """Toggles to little endianness.""" |
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| 333 | self.islittleendian = 1 # little endian |
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| 334 | |
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| 335 | def bigendian(self) : |
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| 336 | """Toggles to big endianness.""" |
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| 337 | self.islittleendian = 0 # big endian |
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| 338 | |
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| 339 | def getJobSize(self) : |
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| 340 | """Counts pages in a PCLXL (PCL6) document.""" |
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| 341 | self.pagecount = 0 |
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| 342 | while 1 : |
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| 343 | char = self.infile.read(1) |
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| 344 | if not char : |
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| 345 | break |
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| 346 | index = ord(char) |
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[1487] | 347 | length = self.tags[index]() |
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| 348 | if length : |
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| 349 | self.infile.read(length) |
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[1482] | 350 | return self.pagecount |
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[1487] | 351 | |
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[1482] | 352 | class PDLAnalyzer : |
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| 353 | """Generic PDL Analyzer class.""" |
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| 354 | def __init__(self, filename) : |
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[1487] | 355 | """Initializes the PDL analyzer. |
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| 356 | |
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| 357 | filename is the name of the file or '-' for stdin. |
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| 358 | filename can also be a file-like object which |
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| 359 | supports read() and seek(). |
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| 360 | """ |
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[1482] | 361 | self.filename = filename |
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| 362 | |
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| 363 | def getJobSize(self) : |
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| 364 | """Returns the job's size.""" |
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| 365 | self.openFile() |
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[1487] | 366 | try : |
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| 367 | pdlhandler = self.detectPDLHandler() |
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| 368 | except PDLAnalyzerError, msg : |
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| 369 | self.closeFile() |
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| 370 | raise PDLAnalyzerError, "ERROR : Unknown file format for %s (%s)" % (self.filename, msg) |
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| 371 | else : |
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[1482] | 372 | try : |
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| 373 | size = pdlhandler(self.infile).getJobSize() |
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| 374 | finally : |
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| 375 | self.closeFile() |
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| 376 | return size |
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| 377 | |
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| 378 | def openFile(self) : |
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| 379 | """Opens the job's data stream for reading.""" |
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[1487] | 380 | self.mustclose = 1 |
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| 381 | if hasattr(self.filename, "read") and hasattr(self.filename, "seek") : |
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| 382 | # filename is in fact a file-like object |
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| 383 | self.infile = self.filename |
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| 384 | self.mustclose = 0 # we don't want to close this file when finished |
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| 385 | elif self.filename == "-" : |
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[1482] | 386 | # we must read from stdin |
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| 387 | # but since stdin is not seekable, we have to use a temporary |
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| 388 | # file instead. |
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| 389 | self.infile = tempfile.TemporaryFile() |
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| 390 | while 1 : |
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[1487] | 391 | data = sys.stdin.read(MEGABYTE) |
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[1482] | 392 | if not data : |
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| 393 | break |
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| 394 | self.infile.write(data) |
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| 395 | self.infile.flush() |
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| 396 | self.infile.seek(0) |
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| 397 | else : |
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| 398 | # normal file |
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| 399 | self.infile = open(self.filename, "rb") |
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| 400 | |
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| 401 | def closeFile(self) : |
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[1487] | 402 | """Closes the job's data stream if we can close it.""" |
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| 403 | if self.mustclose : |
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| 404 | self.infile.close() |
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[1482] | 405 | |
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| 406 | def isPostScript(self, data) : |
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| 407 | """Returns 1 if data is PostScript, else 0.""" |
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| 408 | if data.startswith("%!") or \ |
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| 409 | data.startswith("\004%!") or \ |
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| 410 | data.startswith("\033%-12345X%!PS") or \ |
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| 411 | ((data[:128].find("\033%-12345X") != -1) and \ |
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| 412 | ((data.find("LANGUAGE=POSTSCRIPT") != -1) or \ |
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| 413 | (data.find("LANGUAGE = POSTSCRIPT") != -1) or \ |
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[1543] | 414 | (data.find("LANGUAGE = Postscript") != -1))) or \ |
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| 415 | (data.find("%!PS-Adobe") != -1) : |
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[1482] | 416 | return 1 |
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| 417 | else : |
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| 418 | return 0 |
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| 419 | |
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| 420 | def isPCL(self, data) : |
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| 421 | """Returns 1 if data is PCL, else 0.""" |
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| 422 | if data.startswith("\033E\033") or \ |
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| 423 | ((data[:128].find("\033%-12345X") != -1) and \ |
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| 424 | ((data.find("LANGUAGE=PCL") != -1) or \ |
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| 425 | (data.find("LANGUAGE = PCL") != -1) or \ |
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| 426 | (data.find("LANGUAGE = Pcl") != -1))) : |
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| 427 | return 1 |
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| 428 | else : |
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| 429 | return 0 |
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| 430 | |
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| 431 | def isPCLXL(self, data) : |
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| 432 | """Returns 1 if data is PCLXL aka PCL6, else 0.""" |
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| 433 | if ((data[:128].find("\033%-12345X") != -1) and \ |
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| 434 | (data.find(" HP-PCL XL;") != -1) and \ |
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| 435 | ((data.find("LANGUAGE=PCLXL") != -1) or \ |
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| 436 | (data.find("LANGUAGE = PCLXL") != -1))) : |
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| 437 | return 1 |
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| 438 | else : |
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| 439 | return 0 |
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| 440 | |
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| 441 | def detectPDLHandler(self) : |
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| 442 | """Tries to autodetect the document format. |
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| 443 | |
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| 444 | Returns the correct PDL handler class or None if format is unknown |
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| 445 | """ |
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| 446 | # Try to detect file type by reading first block of datas |
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| 447 | self.infile.seek(0) |
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[1487] | 448 | firstblock = self.infile.read(KILOBYTE) |
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[1482] | 449 | self.infile.seek(0) |
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| 450 | if self.isPostScript(firstblock) : |
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| 451 | return PostScriptAnalyzer |
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| 452 | elif self.isPCLXL(firstblock) : |
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| 453 | return PCLXLAnalyzer |
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| 454 | elif self.isPCL(firstblock) : |
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| 455 | return PCLAnalyzer |
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[1487] | 456 | else : |
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| 457 | raise PDLAnalyzerError, "Analysis of first data block failed." |
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| 458 | |
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| 459 | def main() : |
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| 460 | """Entry point for PDL Analyzer.""" |
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| 461 | if (len(sys.argv) < 2) or ((not sys.stdin.isatty()) and ("-" not in sys.argv[1:])) : |
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| 462 | sys.argv.append("-") |
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| 463 | |
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| 464 | totalsize = 0 |
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| 465 | for arg in sys.argv[1:] : |
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| 466 | try : |
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| 467 | parser = PDLAnalyzer(arg) |
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| 468 | totalsize += parser.getJobSize() |
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| 469 | except PDLAnalyzerError, msg : |
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| 470 | sys.stderr.write("%s\n" % msg) |
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| 471 | sys.stderr.flush() |
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| 472 | print "%s" % totalsize |
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| 473 | |
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| 474 | if __name__ == "__main__" : |
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| 475 | main() |
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