[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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[1573] | 24 | # Revision 1.17 2004/06/26 23:20:01 jalet |
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| 25 | # Additionnal speedup for GhostScript generated PCL5 files |
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| 26 | # |
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[1572] | 27 | # Revision 1.16 2004/06/26 15:31:00 jalet |
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| 28 | # mmap reintroduced in PCL5 parser |
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| 29 | # |
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[1570] | 30 | # Revision 1.15 2004/06/26 14:14:31 jalet |
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| 31 | # Now uses Psyco if it is available |
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| 32 | # |
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[1568] | 33 | # Revision 1.14 2004/06/25 09:50:28 jalet |
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| 34 | # More debug info in PCLXL parser |
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| 35 | # |
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[1567] | 36 | # Revision 1.13 2004/06/25 08:10:08 jalet |
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| 37 | # Another fix for PCL5 parser |
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| 38 | # |
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[1566] | 39 | # Revision 1.12 2004/06/24 23:09:53 jalet |
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| 40 | # Fix for number of copies in PCL5 parser |
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| 41 | # |
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[1564] | 42 | # Revision 1.11 2004/06/23 22:07:50 jalet |
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| 43 | # Fixed PCL5 parser according to the sources of rastertohp |
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| 44 | # |
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[1553] | 45 | # Revision 1.10 2004/06/18 22:24:03 jalet |
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| 46 | # Removed old comments |
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| 47 | # |
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[1552] | 48 | # Revision 1.9 2004/06/18 22:21:27 jalet |
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| 49 | # Native PDF parser greatly improved. |
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| 50 | # GhostScript based PDF parser completely removed because native code |
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| 51 | # is now portable across Python versions. |
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| 52 | # |
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[1551] | 53 | # Revision 1.8 2004/06/18 20:49:46 jalet |
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| 54 | # "ERROR:" prefix added |
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| 55 | # |
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[1550] | 56 | # Revision 1.7 2004/06/18 17:48:04 jalet |
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| 57 | # Added native fast PDF parsing method |
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| 58 | # |
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[1547] | 59 | # Revision 1.6 2004/06/18 14:00:16 jalet |
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| 60 | # Added PDF support in smart PDL analyzer (through GhostScript for now) |
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| 61 | # |
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[1544] | 62 | # Revision 1.5 2004/06/18 10:09:05 jalet |
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| 63 | # Resets file pointer to start of file in all cases |
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| 64 | # |
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[1543] | 65 | # Revision 1.4 2004/06/18 06:16:14 jalet |
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| 66 | # Fixes PostScript detection code for incorrect drivers |
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| 67 | # |
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[1487] | 68 | # Revision 1.3 2004/05/21 20:40:08 jalet |
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| 69 | # All the code for pkpgcounter is now in pdlanalyzer.py |
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| 70 | # |
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[1485] | 71 | # Revision 1.2 2004/05/19 19:09:36 jalet |
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| 72 | # Speed improvement |
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| 73 | # |
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[1482] | 74 | # Revision 1.1 2004/05/18 09:59:54 jalet |
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| 75 | # pkpgcounter is now just a wrapper around the PDLAnalyzer class |
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| 76 | # |
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| 77 | # |
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| 78 | # |
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| 79 | |
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| 80 | import sys |
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[1547] | 81 | import os |
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[1552] | 82 | import re |
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[1482] | 83 | import struct |
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| 84 | import tempfile |
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[1572] | 85 | import mmap |
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[1482] | 86 | |
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[1487] | 87 | KILOBYTE = 1024 |
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| 88 | MEGABYTE = 1024 * KILOBYTE |
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| 89 | |
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| 90 | class PDLAnalyzerError(Exception): |
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| 91 | """An exception for PDL Analyzer related stuff.""" |
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| 92 | def __init__(self, message = ""): |
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| 93 | self.message = message |
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| 94 | Exception.__init__(self, message) |
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| 95 | def __repr__(self): |
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| 96 | return self.message |
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| 97 | __str__ = __repr__ |
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| 98 | |
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[1482] | 99 | class PostScriptAnalyzer : |
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| 100 | def __init__(self, infile) : |
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| 101 | """Initialize PostScript Analyzer.""" |
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| 102 | self.infile = infile |
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| 103 | |
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| 104 | def getJobSize(self) : |
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| 105 | """Count pages in a DSC compliant PostScript document.""" |
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| 106 | pagecount = 0 |
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[1552] | 107 | for line in self.infile.xreadlines() : |
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[1482] | 108 | if line.startswith("%%Page: ") : |
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| 109 | pagecount += 1 |
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| 110 | return pagecount |
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| 111 | |
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[1547] | 112 | class PDFAnalyzer : |
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| 113 | def __init__(self, infile) : |
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| 114 | """Initialize PDF Analyzer.""" |
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| 115 | self.infile = infile |
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[1550] | 116 | |
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[1552] | 117 | def getJobSize(self) : |
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| 118 | """Counts pages in a PDF document.""" |
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[1573] | 119 | regexp = re.compile(r"(/Type) ?(/Page)[/ \t\r\n]") |
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[1550] | 120 | pagecount = 0 |
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[1552] | 121 | for line in self.infile.xreadlines() : |
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| 122 | pagecount += len(regexp.findall(line)) |
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[1550] | 123 | return pagecount |
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[1547] | 124 | |
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[1482] | 125 | class PCLAnalyzer : |
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| 126 | def __init__(self, infile) : |
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| 127 | """Initialize PCL Analyzer.""" |
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| 128 | self.infile = infile |
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| 129 | |
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| 130 | def getJobSize(self) : |
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| 131 | """Count pages in a PCL5 document.""" |
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| 132 | # |
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| 133 | # Algorithm from pclcount |
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| 134 | # (c) 2003, by Eduardo Gielamo Oliveira & Rodolfo Broco Manin |
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| 135 | # published under the terms of the GNU General Public Licence v2. |
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| 136 | # |
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| 137 | # Backported from C to Python by Jerome Alet, then enhanced |
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| 138 | # with more PCL tags detected. I think all the necessary PCL tags |
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| 139 | # are recognized to correctly handle PCL5 files wrt their number |
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| 140 | # of pages. The documentation used for this was : |
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| 141 | # |
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| 142 | # HP PCL/PJL Reference Set |
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| 143 | # PCL5 Printer Language Technical Quick Reference Guide |
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| 144 | # http://h20000.www2.hp.com/bc/docs/support/SupportManual/bpl13205/bpl13205.pdf |
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| 145 | # |
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[1572] | 146 | infileno = self.infile.fileno() |
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| 147 | minfile = mmap.mmap(infileno, os.fstat(infileno).st_size, access=mmap.ACCESS_READ) |
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[1482] | 148 | tagsends = { "&n" : "W", |
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| 149 | "&b" : "W", |
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| 150 | "*i" : "W", |
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| 151 | "*l" : "W", |
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| 152 | "*m" : "W", |
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| 153 | "*v" : "W", |
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| 154 | "*c" : "W", |
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| 155 | "(f" : "W", |
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| 156 | "(s" : "W", |
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| 157 | ")s" : "W", |
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| 158 | "&p" : "X", |
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[1564] | 159 | "&l" : "XH", |
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| 160 | "&a" : "G", |
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[1573] | 161 | # "*b" : "VW", # treated specially because it occurs very often |
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[1564] | 162 | } |
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[1567] | 163 | pagecount = resets = ejects = backsides = 0 |
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[1482] | 164 | tag = None |
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[1566] | 165 | copies = {} |
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[1572] | 166 | pos = 0 |
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| 167 | try : |
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| 168 | while 1 : |
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| 169 | char = minfile[pos] ; pos += 1 |
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| 170 | if char == "\014" : |
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| 171 | pagecount += 1 |
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| 172 | elif char == "\033" : |
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| 173 | # |
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| 174 | # <ESC>*b###W -> Start of a raster data row/block |
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| 175 | # <ESC>*b###V -> Start of a raster data plane |
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| 176 | # <ESC>*c###W -> Start of a user defined pattern |
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| 177 | # <ESC>*i###W -> Start of a viewing illuminant block |
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| 178 | # <ESC>*l###W -> Start of a color lookup table |
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| 179 | # <ESC>*m###W -> Start of a download dither matrix block |
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| 180 | # <ESC>*v###W -> Start of a configure image data block |
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| 181 | # <ESC>(s###W -> Start of a characters description block |
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| 182 | # <ESC>)s###W -> Start of a fonts description block |
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| 183 | # <ESC>(f###W -> Start of a symbol set block |
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| 184 | # <ESC>&b###W -> Start of configuration data block |
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| 185 | # <ESC>&l###X -> Number of copies for current page |
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| 186 | # <ESC>&n###W -> Starts an alphanumeric string ID block |
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| 187 | # <ESC>&p###X -> Start of a non printable characters block |
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| 188 | # <ESC>&a2G -> Back side when duplex mode as generated by rastertohp |
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| 189 | # <ESC>&l0H -> Eject if NumPlanes > 1, as generated by rastertohp |
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| 190 | # |
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| 191 | tagstart = minfile[pos] ; pos += 1 |
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| 192 | if tagstart in "E9=YZ" : # one byte PCL tag |
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| 193 | if tagstart == "E" : |
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| 194 | resets += 1 |
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| 195 | continue # skip to next tag |
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| 196 | tag = tagstart + minfile[pos] ; pos += 1 |
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[1573] | 197 | if tag == "*b" : |
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| 198 | tagend = "VW" |
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[1572] | 199 | else : |
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[1573] | 200 | try : |
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| 201 | tagend = tagsends[tag] |
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| 202 | except KeyError : |
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| 203 | continue # Unsupported PCL tag |
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| 204 | # Now read the numeric argument |
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| 205 | size = 0 |
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| 206 | while 1 : |
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| 207 | char = minfile[pos] ; pos += 1 |
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| 208 | if not char.isdigit() : |
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| 209 | break |
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| 210 | size = (size * 10) + int(char) |
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| 211 | if char in tagend : |
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| 212 | if (tag == "&l") and (char == "X") : # copies for current page |
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| 213 | copies[pagecount] = size |
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| 214 | elif (tag == "&l") and (char == "H") and (size == 0) : |
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| 215 | ejects += 1 # Eject |
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| 216 | elif (tag == "&a") and (size == 2) : |
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| 217 | backsides += 1 # Back side in duplex mode |
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| 218 | else : |
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| 219 | # we just ignore the block. |
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| 220 | if tag == "&n" : |
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| 221 | # we have to take care of the operation id byte |
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| 222 | # which is before the string itself |
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| 223 | size += 1 |
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| 224 | pos += size |
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[1572] | 225 | except IndexError : # EOF ? |
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| 226 | minfile.close() # reached EOF |
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[1482] | 227 | |
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[1567] | 228 | # if pagecount is still 0, we will use the number |
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[1482] | 229 | # of resets instead of the number of form feed characters. |
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| 230 | # but the number of resets is always at least 2 with a valid |
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| 231 | # pcl file : one at the very start and one at the very end |
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| 232 | # of the job's data. So we substract 2 from the number of |
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| 233 | # resets. And since on our test data we needed to substract |
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| 234 | # 1 more, we finally substract 3, and will test several |
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| 235 | # PCL files with this. If resets < 2, then the file is |
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[1567] | 236 | # probably not a valid PCL file, so we use 0 |
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| 237 | if not pagecount : |
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| 238 | pagecount = (pagecount or ((resets - 3) * (resets > 2))) |
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| 239 | else : |
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| 240 | # here we add counters for other ways new pages may have |
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| 241 | # been printed and ejected by the printer |
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| 242 | pagecount += ejects + backsides |
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[1482] | 243 | |
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[1566] | 244 | # now handle number of copies for each page (may differ). |
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| 245 | # in duplex mode, number of copies may be sent only once. |
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| 246 | for pnum in range(pagecount) : |
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| 247 | # if no number of copies defined, take the preceding one else 1. |
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| 248 | nb = copies.get(pnum, copies.get(pnum-1, 1)) |
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| 249 | pagecount += (nb - 1) |
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| 250 | return pagecount |
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| 251 | |
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[1482] | 252 | class PCLXLAnalyzer : |
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| 253 | def __init__(self, infile) : |
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| 254 | """Initialize PCLXL Analyzer.""" |
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[1487] | 255 | raise PDLAnalyzerError, "PCLXL (aka PCL6) is not supported yet." |
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[1482] | 256 | self.infile = infile |
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| 257 | self.islittleendian = None |
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| 258 | found = 0 |
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| 259 | while not found : |
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| 260 | line = self.infile.readline() |
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| 261 | if not line : |
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| 262 | break |
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| 263 | if line[1:12] == " HP-PCL XL;" : |
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| 264 | found = 1 |
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| 265 | if line[0] == ")" : |
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| 266 | self.littleendian() |
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| 267 | elif line[0] == "(" : |
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| 268 | self.bigendian() |
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| 269 | if not found : |
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[1487] | 270 | raise PDLAnalyzerError, "This file doesn't seem to be PCLXL (aka PCL6)" |
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[1482] | 271 | else : |
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[1568] | 272 | self.tags = [ self.skipped ] * 256 |
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[1482] | 273 | self.tags[0x28] = self.bigendian # big endian |
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| 274 | self.tags[0x29] = self.littleendian # big endian |
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| 275 | self.tags[0x43] = self.beginPage # BeginPage |
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| 276 | self.tags[0x44] = self.endPage # EndPage |
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| 277 | |
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[1568] | 278 | self.tags[0xc0] = lambda: self.debug("%08x : ubyte" % self.infile.tell()) or 1 # ubyte |
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| 279 | self.tags[0xc1] = lambda: self.debug("%08x : uint16" % self.infile.tell()) or 2 # uint16 |
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| 280 | self.tags[0xc2] = lambda: self.debug("%08x : uint32" % self.infile.tell()) or 4 # uint32 |
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| 281 | self.tags[0xc3] = lambda: self.debug("%08x : sint16" % self.infile.tell()) or 2 # sint16 |
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| 282 | self.tags[0xc4] = lambda: self.debug("%08x : sint32" % self.infile.tell()) or 4 # sint32 |
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| 283 | self.tags[0xc5] = lambda: self.debug("%08x : real32" % self.infile.tell()) or 4 # real32 |
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[1482] | 284 | |
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| 285 | self.tags[0xc8] = self.array_8 # ubyte_array |
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| 286 | self.tags[0xc9] = self.array_16 # uint16_array |
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| 287 | self.tags[0xca] = self.array_32 # uint32_array |
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| 288 | self.tags[0xcb] = self.array_16 # sint16_array |
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| 289 | self.tags[0xcc] = self.array_32 # sint32_array |
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| 290 | self.tags[0xcd] = self.array_32 # real32_array |
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| 291 | |
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[1568] | 292 | self.tags[0xd0] = lambda: self.debug("%08x : ubyte_xy" % self.infile.tell()) or 2 # ubyte_xy |
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| 293 | self.tags[0xd1] = lambda: self.debug("%08x : uint16_xy" % self.infile.tell()) or 4 # uint16_xy |
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| 294 | self.tags[0xd2] = lambda: self.debug("%08x : uint32_xy" % self.infile.tell()) or 8 # uint32_xy |
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| 295 | self.tags[0xd3] = lambda: self.debug("%08x : sint16_xy" % self.infile.tell()) or 4 # sint16_xy |
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| 296 | self.tags[0xd4] = lambda: self.debug("%08x : sint32_xy" % self.infile.tell()) or 8 # sint32_xy |
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| 297 | self.tags[0xd5] = lambda: self.debug("%08x : real32_xy" % self.infile.tell()) or 8 # real32_xy |
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[1482] | 298 | |
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[1568] | 299 | self.tags[0xd0] = lambda: self.debug("%08x : ubyte_box" % self.infile.tell()) or 4 # ubyte_box |
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| 300 | self.tags[0xd1] = lambda: self.debug("%08x : uint16_box" % self.infile.tell()) or 8 # uint16_box |
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| 301 | self.tags[0xd2] = lambda: self.debug("%08x : uint32_box" % self.infile.tell()) or 16 # uint32_box |
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| 302 | self.tags[0xd3] = lambda: self.debug("%08x : sint16_box" % self.infile.tell()) or 8 # sint16_box |
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| 303 | self.tags[0xd4] = lambda: self.debug("%08x : sint32_box" % self.infile.tell()) or 16 # sint32_box |
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| 304 | self.tags[0xd5] = lambda: self.debug("%08x : real32_box" % self.infile.tell()) or 16 # real32_box |
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[1482] | 305 | |
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[1568] | 306 | self.tags[0xf8] = lambda: self.debug("%08x : attr_ubyte" % self.infile.tell()) or 1 # attr_ubyte |
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| 307 | self.tags[0xf9] = lambda: self.debug("%08x : attr_uint16" % self.infile.tell()) or 2 # attr_uint16 |
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[1482] | 308 | |
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| 309 | self.tags[0xfa] = self.embeddedData # dataLength |
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| 310 | self.tags[0xfb] = self.embeddedDataSmall # dataLengthByte |
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| 311 | |
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| 312 | def debug(self, msg) : |
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| 313 | """Outputs a debug message on stderr.""" |
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| 314 | sys.stderr.write("%s\n" % msg) |
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| 315 | sys.stderr.flush() |
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| 316 | |
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[1568] | 317 | def skipped(self) : |
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| 318 | """Skips a byte.""" |
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| 319 | self.debug("%08x : skip" % self.infile.tell()) |
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| 320 | |
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[1482] | 321 | def beginPage(self) : |
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| 322 | """Indicates the beginning of a new page.""" |
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| 323 | self.pagecount += 1 |
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[1568] | 324 | self.debug("%08x : beginPage (%i)" % (self.infile.tell(), self.pagecount)) |
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[1482] | 325 | |
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| 326 | def endPage(self) : |
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| 327 | """Indicates the end of a page.""" |
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[1568] | 328 | self.debug("%08x : endPage (%i)" % (self.infile.tell(), self.pagecount)) |
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[1482] | 329 | |
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| 330 | def handleArray(self, itemsize) : |
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| 331 | """Handles arrays.""" |
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[1487] | 332 | pos = self.infile.tell() |
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[1482] | 333 | datatype = self.infile.read(1) |
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[1568] | 334 | self.debug("%08x : Array of datatype 0x%02x" % (pos, ord(datatype))) |
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[1487] | 335 | length = self.tags[ord(datatype)]() |
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| 336 | if length is None : |
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| 337 | self.debug("Bogus array length at %s" % pos) |
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[1482] | 338 | else : |
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[1487] | 339 | sarraysize = self.infile.read(length) |
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| 340 | if self.islittleendian : |
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| 341 | fmt = "<" |
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| 342 | else : |
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| 343 | fmt = ">" |
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| 344 | if length == 1 : |
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| 345 | fmt += "B" |
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| 346 | elif length == 2 : |
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| 347 | fmt += "H" |
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| 348 | elif length == 4 : |
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| 349 | fmt += "I" |
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| 350 | else : |
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| 351 | raise PDLAnalyzerError, "Error on array size at %s" % self.infile.tell() |
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| 352 | arraysize = struct.unpack(fmt, sarraysize)[0] |
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[1568] | 353 | self.debug("itemsize %s * size %s = %s" % (itemsize, arraysize, itemsize*arraysize)) |
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[1487] | 354 | return arraysize * itemsize |
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[1482] | 355 | |
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| 356 | def array_8(self) : |
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| 357 | """Handles byte arrays.""" |
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[1568] | 358 | self.debug("%08x : array_8" % self.infile.tell()) |
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[1482] | 359 | return self.handleArray(1) |
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| 360 | |
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| 361 | def array_16(self) : |
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| 362 | """Handles byte arrays.""" |
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[1568] | 363 | self.debug("%08x : array_16" % self.infile.tell()) |
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[1482] | 364 | return self.handleArray(2) |
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| 365 | |
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| 366 | def array_32(self) : |
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| 367 | """Handles byte arrays.""" |
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[1568] | 368 | self.debug("%08x : array_32" % self.infile.tell()) |
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[1482] | 369 | return self.handleArray(4) |
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| 370 | |
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| 371 | def embeddedDataSmall(self) : |
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| 372 | """Handle small amounts of data.""" |
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[1568] | 373 | self.debug("%08x : small_datablock" % self.infile.tell()) |
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[1487] | 374 | pos = self.infile.tell() |
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| 375 | val = ord(self.infile.read(1)) |
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[1568] | 376 | self.debug("%08x : Small datablock length : 0x%02x" % (self.infile.tell()-1, val)) |
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[1487] | 377 | return val |
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[1482] | 378 | |
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| 379 | def embeddedData(self) : |
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| 380 | """Handle normal amounts of data.""" |
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[1568] | 381 | self.debug("%08x : large_datablock" % self.infile.tell()) |
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[1482] | 382 | if self.islittleendian : |
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| 383 | fmt = "<I" |
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| 384 | else : |
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| 385 | fmt = ">I" |
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[1487] | 386 | pos = self.infile.tell() |
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| 387 | val = struct.unpack(fmt, self.infile.read(4))[0] |
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[1568] | 388 | self.debug("%08x : Large datablock length : 0x%04x" % (self.infile.tell()-4, val)) |
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[1487] | 389 | return val |
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[1482] | 390 | |
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| 391 | def littleendian(self) : |
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| 392 | """Toggles to little endianness.""" |
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[1568] | 393 | self.debug("%08x : littleendian" % self.infile.tell()) |
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[1482] | 394 | self.islittleendian = 1 # little endian |
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| 395 | |
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| 396 | def bigendian(self) : |
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| 397 | """Toggles to big endianness.""" |
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[1568] | 398 | self.debug("%08x : bigendian" % self.infile.tell()) |
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[1482] | 399 | self.islittleendian = 0 # big endian |
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| 400 | |
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| 401 | def getJobSize(self) : |
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| 402 | """Counts pages in a PCLXL (PCL6) document.""" |
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| 403 | self.pagecount = 0 |
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| 404 | while 1 : |
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| 405 | char = self.infile.read(1) |
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| 406 | if not char : |
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| 407 | break |
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| 408 | index = ord(char) |
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[1487] | 409 | length = self.tags[index]() |
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| 410 | if length : |
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| 411 | self.infile.read(length) |
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[1482] | 412 | return self.pagecount |
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[1487] | 413 | |
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[1482] | 414 | class PDLAnalyzer : |
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| 415 | """Generic PDL Analyzer class.""" |
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| 416 | def __init__(self, filename) : |
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[1487] | 417 | """Initializes the PDL analyzer. |
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| 418 | |
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| 419 | filename is the name of the file or '-' for stdin. |
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| 420 | filename can also be a file-like object which |
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| 421 | supports read() and seek(). |
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| 422 | """ |
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[1482] | 423 | self.filename = filename |
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[1570] | 424 | try : |
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| 425 | import psyco |
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| 426 | except ImportError : |
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| 427 | pass # Psyco is not installed |
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| 428 | else : |
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| 429 | # Psyco is installed, tell it to compile |
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| 430 | # the CPU intensive methods : PCL and PCLXL |
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| 431 | # parsing will greatly benefit from this, |
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| 432 | # for PostScript and PDF the difference is |
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| 433 | # barely noticeable since they are already |
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| 434 | # almost optimal, and much more speedy anyway. |
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| 435 | psyco.bind(PostScriptAnalyzer.getJobSize) |
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| 436 | psyco.bind(PDFAnalyzer.getJobSize) |
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| 437 | psyco.bind(PCLAnalyzer.getJobSize) |
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| 438 | psyco.bind(PCLXLAnalyzer.getJobSize) |
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[1482] | 439 | |
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| 440 | def getJobSize(self) : |
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| 441 | """Returns the job's size.""" |
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| 442 | self.openFile() |
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[1487] | 443 | try : |
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| 444 | pdlhandler = self.detectPDLHandler() |
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| 445 | except PDLAnalyzerError, msg : |
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| 446 | self.closeFile() |
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| 447 | raise PDLAnalyzerError, "ERROR : Unknown file format for %s (%s)" % (self.filename, msg) |
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| 448 | else : |
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[1482] | 449 | try : |
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| 450 | size = pdlhandler(self.infile).getJobSize() |
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| 451 | finally : |
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| 452 | self.closeFile() |
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| 453 | return size |
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| 454 | |
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| 455 | def openFile(self) : |
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| 456 | """Opens the job's data stream for reading.""" |
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[1550] | 457 | self.mustclose = 0 # by default we don't want to close the file when finished |
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[1487] | 458 | if hasattr(self.filename, "read") and hasattr(self.filename, "seek") : |
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| 459 | # filename is in fact a file-like object |
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[1550] | 460 | infile = self.filename |
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[1487] | 461 | elif self.filename == "-" : |
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[1482] | 462 | # we must read from stdin |
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[1550] | 463 | infile = sys.stdin |
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[1482] | 464 | else : |
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| 465 | # normal file |
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[1553] | 466 | self.infile = open(self.filename, "rb") |
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[1550] | 467 | self.mustclose = 1 |
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| 468 | return |
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[1482] | 469 | |
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[1550] | 470 | # Use a temporary file, always seekable contrary to standard input. |
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[1553] | 471 | self.infile = tempfile.TemporaryFile(mode="w+b") |
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[1550] | 472 | while 1 : |
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| 473 | data = infile.read(MEGABYTE) |
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| 474 | if not data : |
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| 475 | break |
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| 476 | self.infile.write(data) |
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| 477 | self.infile.flush() |
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| 478 | self.infile.seek(0) |
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| 479 | |
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[1482] | 480 | def closeFile(self) : |
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[1487] | 481 | """Closes the job's data stream if we can close it.""" |
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| 482 | if self.mustclose : |
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| 483 | self.infile.close() |
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[1544] | 484 | else : |
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| 485 | # if we don't have to close the file, then |
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| 486 | # ensure the file pointer is reset to the |
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| 487 | # start of the file in case the process wants |
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| 488 | # to read the file again. |
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| 489 | try : |
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| 490 | self.infile.seek(0) |
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| 491 | except : |
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| 492 | pass # probably stdin, which is not seekable |
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[1482] | 493 | |
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| 494 | def isPostScript(self, data) : |
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| 495 | """Returns 1 if data is PostScript, else 0.""" |
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| 496 | if data.startswith("%!") or \ |
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| 497 | data.startswith("\004%!") or \ |
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| 498 | data.startswith("\033%-12345X%!PS") or \ |
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| 499 | ((data[:128].find("\033%-12345X") != -1) and \ |
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| 500 | ((data.find("LANGUAGE=POSTSCRIPT") != -1) or \ |
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| 501 | (data.find("LANGUAGE = POSTSCRIPT") != -1) or \ |
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[1543] | 502 | (data.find("LANGUAGE = Postscript") != -1))) or \ |
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| 503 | (data.find("%!PS-Adobe") != -1) : |
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[1482] | 504 | return 1 |
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| 505 | else : |
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| 506 | return 0 |
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| 507 | |
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[1547] | 508 | def isPDF(self, data) : |
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| 509 | """Returns 1 if data is PDF, else 0.""" |
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| 510 | if data.startswith("%PDF-") or \ |
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| 511 | data.startswith("\033%-12345X%PDF-") or \ |
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| 512 | ((data[:128].find("\033%-12345X") != -1) and (data.upper().find("LANGUAGE=PDF") != -1)) or \ |
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| 513 | (data.find("%PDF-") != -1) : |
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| 514 | return 1 |
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| 515 | else : |
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| 516 | return 0 |
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| 517 | |
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[1482] | 518 | def isPCL(self, data) : |
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| 519 | """Returns 1 if data is PCL, else 0.""" |
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| 520 | if data.startswith("\033E\033") or \ |
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| 521 | ((data[:128].find("\033%-12345X") != -1) and \ |
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| 522 | ((data.find("LANGUAGE=PCL") != -1) or \ |
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| 523 | (data.find("LANGUAGE = PCL") != -1) or \ |
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| 524 | (data.find("LANGUAGE = Pcl") != -1))) : |
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| 525 | return 1 |
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| 526 | else : |
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| 527 | return 0 |
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| 528 | |
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| 529 | def isPCLXL(self, data) : |
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| 530 | """Returns 1 if data is PCLXL aka PCL6, else 0.""" |
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| 531 | if ((data[:128].find("\033%-12345X") != -1) and \ |
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| 532 | (data.find(" HP-PCL XL;") != -1) and \ |
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| 533 | ((data.find("LANGUAGE=PCLXL") != -1) or \ |
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| 534 | (data.find("LANGUAGE = PCLXL") != -1))) : |
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| 535 | return 1 |
---|
| 536 | else : |
---|
| 537 | return 0 |
---|
| 538 | |
---|
| 539 | def detectPDLHandler(self) : |
---|
| 540 | """Tries to autodetect the document format. |
---|
| 541 | |
---|
| 542 | Returns the correct PDL handler class or None if format is unknown |
---|
| 543 | """ |
---|
| 544 | # Try to detect file type by reading first block of datas |
---|
| 545 | self.infile.seek(0) |
---|
[1487] | 546 | firstblock = self.infile.read(KILOBYTE) |
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[1482] | 547 | self.infile.seek(0) |
---|
| 548 | if self.isPostScript(firstblock) : |
---|
| 549 | return PostScriptAnalyzer |
---|
| 550 | elif self.isPCLXL(firstblock) : |
---|
| 551 | return PCLXLAnalyzer |
---|
| 552 | elif self.isPCL(firstblock) : |
---|
| 553 | return PCLAnalyzer |
---|
[1547] | 554 | elif self.isPDF(firstblock) : |
---|
| 555 | return PDFAnalyzer |
---|
[1487] | 556 | else : |
---|
| 557 | raise PDLAnalyzerError, "Analysis of first data block failed." |
---|
| 558 | |
---|
| 559 | def main() : |
---|
| 560 | """Entry point for PDL Analyzer.""" |
---|
| 561 | if (len(sys.argv) < 2) or ((not sys.stdin.isatty()) and ("-" not in sys.argv[1:])) : |
---|
| 562 | sys.argv.append("-") |
---|
| 563 | |
---|
| 564 | totalsize = 0 |
---|
| 565 | for arg in sys.argv[1:] : |
---|
| 566 | try : |
---|
| 567 | parser = PDLAnalyzer(arg) |
---|
| 568 | totalsize += parser.getJobSize() |
---|
| 569 | except PDLAnalyzerError, msg : |
---|
[1551] | 570 | sys.stderr.write("ERROR: %s\n" % msg) |
---|
[1487] | 571 | sys.stderr.flush() |
---|
| 572 | print "%s" % totalsize |
---|
| 573 | |
---|
| 574 | if __name__ == "__main__" : |
---|
| 575 | main() |
---|