| 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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| 24 | # Revision 1.34 2004/08/27 09:08:22 jalet |
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| 25 | # Improvement in PostScript parser to avoid being fooled by clever "students" |
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| 26 | # |
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| 27 | # Revision 1.33 2004/08/27 09:02:34 jalet |
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| 28 | # Forgot to remove some special debugging code... |
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| 29 | # |
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| 30 | # Revision 1.32 2004/08/27 08:58:50 jalet |
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| 31 | # Relax checks for PCL5 header to accomodate strange printer drivers |
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| 32 | # |
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| 33 | # Revision 1.31 2004/08/22 08:25:33 jalet |
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| 34 | # Improved ESC/P2 miniparser thanks to Paulo Silva |
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| 35 | # |
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| 36 | # Revision 1.30 2004/08/21 23:16:57 jalet |
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| 37 | # First draft of ESC/P2 (mini-)parser. |
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| 38 | # |
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| 39 | # Revision 1.29 2004/08/11 16:25:38 jalet |
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| 40 | # Fixed index problem in PCLXL parser when retrieving number of copies for |
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| 41 | # each page |
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| 42 | # |
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| 43 | # Revision 1.28 2004/08/10 23:01:49 jalet |
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| 44 | # Fixed number of copies in PCL5 parser |
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| 45 | # |
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| 46 | # Revision 1.27 2004/08/09 18:14:22 jalet |
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| 47 | # Added workaround for number of copies and some PostScript drivers |
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| 48 | # |
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| 49 | # Revision 1.26 2004/07/22 13:49:51 jalet |
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| 50 | # Added support for binary PostScript through GhostScript if native DSC |
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| 51 | # compliant PostScript analyzer doesn't find any page. This is much |
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| 52 | # slower though, so native analyzer is tried first. |
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| 53 | # |
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| 54 | # Revision 1.25 2004/07/10 14:06:36 jalet |
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| 55 | # Fix for Python2.1 incompatibilities |
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| 56 | # |
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| 57 | # Revision 1.24 2004/07/05 21:00:39 jalet |
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| 58 | # Fix for number of copies for each page in PCLXL parser |
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| 59 | # |
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| 60 | # Revision 1.23 2004/07/03 08:21:59 jalet |
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| 61 | # Testsuite for PDL Analyzer added |
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| 62 | # |
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| 63 | # Revision 1.22 2004/06/29 14:21:41 jalet |
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| 64 | # Smallish optimization |
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| 65 | # |
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| 66 | # Revision 1.21 2004/06/28 23:11:26 jalet |
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| 67 | # Code de-factorization in PCLXL parser |
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| 68 | # |
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| 69 | # Revision 1.20 2004/06/28 22:38:41 jalet |
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| 70 | # Increased speed by a factor of 2 in PCLXL parser |
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| 71 | # |
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| 72 | # Revision 1.19 2004/06/28 21:20:30 jalet |
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| 73 | # PCLXL support now works ! |
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| 74 | # |
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| 75 | # Revision 1.18 2004/06/27 22:59:37 jalet |
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| 76 | # More work on PCLXL parser |
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| 77 | # |
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| 78 | # Revision 1.17 2004/06/26 23:20:01 jalet |
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| 79 | # Additionnal speedup for GhostScript generated PCL5 files |
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| 80 | # |
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| 81 | # Revision 1.16 2004/06/26 15:31:00 jalet |
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| 82 | # mmap reintroduced in PCL5 parser |
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| 83 | # |
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| 84 | # Revision 1.15 2004/06/26 14:14:31 jalet |
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| 85 | # Now uses Psyco if it is available |
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| 86 | # |
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| 87 | # Revision 1.14 2004/06/25 09:50:28 jalet |
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| 88 | # More debug info in PCLXL parser |
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| 89 | # |
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| 90 | # Revision 1.13 2004/06/25 08:10:08 jalet |
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| 91 | # Another fix for PCL5 parser |
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| 92 | # |
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| 93 | # Revision 1.12 2004/06/24 23:09:53 jalet |
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| 94 | # Fix for number of copies in PCL5 parser |
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| 95 | # |
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| 96 | # Revision 1.11 2004/06/23 22:07:50 jalet |
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| 97 | # Fixed PCL5 parser according to the sources of rastertohp |
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| 98 | # |
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| 99 | # Revision 1.10 2004/06/18 22:24:03 jalet |
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| 100 | # Removed old comments |
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| 101 | # |
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| 102 | # Revision 1.9 2004/06/18 22:21:27 jalet |
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| 103 | # Native PDF parser greatly improved. |
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| 104 | # GhostScript based PDF parser completely removed because native code |
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| 105 | # is now portable across Python versions. |
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| 106 | # |
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| 107 | # Revision 1.8 2004/06/18 20:49:46 jalet |
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| 108 | # "ERROR:" prefix added |
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| 109 | # |
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| 110 | # Revision 1.7 2004/06/18 17:48:04 jalet |
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| 111 | # Added native fast PDF parsing method |
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| 112 | # |
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| 113 | # Revision 1.6 2004/06/18 14:00:16 jalet |
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| 114 | # Added PDF support in smart PDL analyzer (through GhostScript for now) |
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| 115 | # |
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| 116 | # Revision 1.5 2004/06/18 10:09:05 jalet |
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| 117 | # Resets file pointer to start of file in all cases |
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| 118 | # |
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| 119 | # Revision 1.4 2004/06/18 06:16:14 jalet |
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| 120 | # Fixes PostScript detection code for incorrect drivers |
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| 121 | # |
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| 122 | # Revision 1.3 2004/05/21 20:40:08 jalet |
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| 123 | # All the code for pkpgcounter is now in pdlanalyzer.py |
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| 124 | # |
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| 125 | # Revision 1.2 2004/05/19 19:09:36 jalet |
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| 126 | # Speed improvement |
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| 127 | # |
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| 128 | # Revision 1.1 2004/05/18 09:59:54 jalet |
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| 129 | # pkpgcounter is now just a wrapper around the PDLAnalyzer class |
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| 130 | # |
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| 131 | # |
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| 132 | # |
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| 133 | |
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| 134 | import sys |
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| 135 | import os |
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| 136 | import re |
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| 137 | from struct import unpack |
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| 138 | import tempfile |
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| 139 | import mmap |
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| 140 | import popen2 |
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| 141 | |
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| 142 | KILOBYTE = 1024 |
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| 143 | MEGABYTE = 1024 * KILOBYTE |
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| 144 | |
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| 145 | class PDLAnalyzerError(Exception): |
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| 146 | """An exception for PDL Analyzer related stuff.""" |
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| 147 | def __init__(self, message = ""): |
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| 148 | self.message = message |
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| 149 | Exception.__init__(self, message) |
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| 150 | def __repr__(self): |
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| 151 | return self.message |
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| 152 | __str__ = __repr__ |
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| 153 | |
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| 154 | class PostScriptAnalyzer : |
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| 155 | def __init__(self, infile) : |
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| 156 | """Initialize PostScript Analyzer.""" |
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| 157 | self.infile = infile |
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| 158 | self.copies = 1 |
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| 159 | |
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| 160 | def throughGhostScript(self) : |
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| 161 | """Get the count through GhostScript, useful for non-DSC compliant PS files.""" |
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| 162 | self.infile.seek(0) |
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| 163 | command = 'gs -sDEVICE=bbox -dNOPAUSE -dBATCH -dQUIET - 2>&1 | grep -c "%%HiResBoundingBox:" 2>/dev/null' |
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| 164 | child = popen2.Popen4(command) |
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| 165 | try : |
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| 166 | data = self.infile.read(MEGABYTE) |
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| 167 | while data : |
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| 168 | child.tochild.write(data) |
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| 169 | data = self.infile.read(MEGABYTE) |
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| 170 | child.tochild.flush() |
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| 171 | child.tochild.close() |
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| 172 | except (IOError, OSError), msg : |
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| 173 | raise PDLAnalyzerError, "Problem during analysis of Binary PostScript document." |
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| 174 | |
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| 175 | pagecount = 0 |
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| 176 | try : |
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| 177 | pagecount = int(child.fromchild.readline().strip()) |
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| 178 | except (IOError, OSError, AttributeError, ValueError) : |
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| 179 | raise PDLAnalyzerError, "Problem during analysis of Binary PostScript document." |
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| 180 | child.fromchild.close() |
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| 181 | |
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| 182 | try : |
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| 183 | retcode = child.wait() |
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| 184 | except OSError, msg : |
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| 185 | raise PDLAnalyzerError, "Problem during analysis of Binary PostScript document." |
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| 186 | return pagecount * self.copies |
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| 187 | |
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| 188 | def natively(self) : |
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| 189 | """Count pages in a DSC compliant PostScript document.""" |
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| 190 | self.infile.seek(0) |
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| 191 | pagecount = 0 |
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| 192 | for line in self.infile.xreadlines() : |
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| 193 | if line.startswith("%%Page: ") : |
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| 194 | pagecount += 1 |
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| 195 | elif line.startswith("%%BeginNonPPDFeature: NumCopies ") : |
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| 196 | # handle # of copies set by some Windows printer driver |
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| 197 | try : |
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| 198 | number = int(line.strip().split()[2]) |
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| 199 | except : |
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| 200 | pass |
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| 201 | else : |
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| 202 | if number > self.copies : |
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| 203 | self.copies = number |
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| 204 | elif line.startswith("1 dict dup /NumCopies ") : |
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| 205 | # handle # of copies set by mozilla/kprinter |
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| 206 | try : |
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| 207 | number = int(line.strip().split()[4]) |
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| 208 | except : |
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| 209 | pass |
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| 210 | else : |
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| 211 | if number > self.copies : |
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| 212 | self.copies = number |
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| 213 | return pagecount * self.copies |
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| 214 | |
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| 215 | def getJobSize(self) : |
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| 216 | """Count pages in PostScript document.""" |
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| 217 | return self.natively() or self.throughGhostScript() |
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| 218 | |
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| 219 | class PDFAnalyzer : |
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| 220 | def __init__(self, infile) : |
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| 221 | """Initialize PDF Analyzer.""" |
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| 222 | self.infile = infile |
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| 223 | |
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| 224 | def getJobSize(self) : |
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| 225 | """Counts pages in a PDF document.""" |
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| 226 | regexp = re.compile(r"(/Type) ?(/Page)[/ \t\r\n]") |
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| 227 | pagecount = 0 |
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| 228 | for line in self.infile.xreadlines() : |
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| 229 | pagecount += len(regexp.findall(line)) |
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| 230 | return pagecount |
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| 231 | |
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| 232 | class ESCP2Analyzer : |
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| 233 | def __init__(self, infile) : |
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| 234 | """Initialize ESC/P2 Analyzer.""" |
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| 235 | self.infile = infile |
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| 236 | |
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| 237 | def getJobSize(self) : |
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| 238 | """Counts pages in an ESC/P2 document.""" |
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| 239 | # with GhostScript, at least, for each page there |
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| 240 | # are two Reset Printer sequences (ESC + @) |
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| 241 | marker = "\033@" |
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| 242 | pagecount = 0 |
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| 243 | for line in self.infile.xreadlines() : |
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| 244 | pagecount += line.count(marker) |
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| 245 | return int(pagecount / 2) |
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| 246 | |
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| 247 | class PCLAnalyzer : |
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| 248 | def __init__(self, infile) : |
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| 249 | """Initialize PCL Analyzer.""" |
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| 250 | self.infile = infile |
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| 251 | |
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| 252 | def getJobSize(self) : |
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| 253 | """Count pages in a PCL5 document. |
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| 254 | |
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| 255 | Should also work for PCL3 and PCL4 documents. |
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| 256 | |
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| 257 | Algorithm from pclcount |
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| 258 | (c) 2003, by Eduardo Gielamo Oliveira & Rodolfo Broco Manin |
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| 259 | published under the terms of the GNU General Public Licence v2. |
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| 260 | |
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| 261 | Backported from C to Python by Jerome Alet, then enhanced |
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| 262 | with more PCL tags detected. I think all the necessary PCL tags |
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| 263 | are recognized to correctly handle PCL5 files wrt their number |
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| 264 | of pages. The documentation used for this was : |
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| 265 | |
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| 266 | HP PCL/PJL Reference Set |
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| 267 | PCL5 Printer Language Technical Quick Reference Guide |
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| 268 | http://h20000.www2.hp.com/bc/docs/support/SupportManual/bpl13205/bpl13205.pdf |
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| 269 | """ |
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| 270 | infileno = self.infile.fileno() |
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| 271 | minfile = mmap.mmap(infileno, os.fstat(infileno)[6], prot=mmap.PROT_READ, flags=mmap.MAP_SHARED) |
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| 272 | tagsends = { "&n" : "W", |
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| 273 | "&b" : "W", |
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| 274 | "*i" : "W", |
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| 275 | "*l" : "W", |
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| 276 | "*m" : "W", |
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| 277 | "*v" : "W", |
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| 278 | "*c" : "W", |
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| 279 | "(f" : "W", |
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| 280 | "(s" : "W", |
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| 281 | ")s" : "W", |
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| 282 | "&p" : "X", |
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| 283 | "&l" : "XH", |
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| 284 | "&a" : "G", |
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| 285 | # "*b" : "VW", # treated specially because it occurs very often |
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| 286 | } |
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| 287 | pagecount = resets = ejects = backsides = 0 |
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| 288 | tag = None |
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| 289 | copies = {} |
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| 290 | pos = 0 |
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| 291 | try : |
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| 292 | while 1 : |
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| 293 | char = minfile[pos] ; pos += 1 |
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| 294 | if char == "\014" : |
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| 295 | pagecount += 1 |
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| 296 | elif char == "\033" : |
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| 297 | # |
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| 298 | # <ESC>*b###W -> Start of a raster data row/block |
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| 299 | # <ESC>*b###V -> Start of a raster data plane |
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| 300 | # <ESC>*c###W -> Start of a user defined pattern |
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| 301 | # <ESC>*i###W -> Start of a viewing illuminant block |
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| 302 | # <ESC>*l###W -> Start of a color lookup table |
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| 303 | # <ESC>*m###W -> Start of a download dither matrix block |
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| 304 | # <ESC>*v###W -> Start of a configure image data block |
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| 305 | # <ESC>(s###W -> Start of a characters description block |
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| 306 | # <ESC>)s###W -> Start of a fonts description block |
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| 307 | # <ESC>(f###W -> Start of a symbol set block |
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| 308 | # <ESC>&b###W -> Start of configuration data block |
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| 309 | # <ESC>&l###X -> Number of copies for current page |
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| 310 | # <ESC>&n###W -> Starts an alphanumeric string ID block |
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| 311 | # <ESC>&p###X -> Start of a non printable characters block |
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| 312 | # <ESC>&a2G -> Back side when duplex mode as generated by rastertohp |
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| 313 | # <ESC>&l0H -> Eject if NumPlanes > 1, as generated by rastertohp |
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| 314 | # |
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| 315 | tagstart = minfile[pos] ; pos += 1 |
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| 316 | if tagstart in "E9=YZ" : # one byte PCL tag |
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| 317 | if tagstart == "E" : |
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| 318 | resets += 1 |
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| 319 | continue # skip to next tag |
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| 320 | tag = tagstart + minfile[pos] ; pos += 1 |
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| 321 | if tag == "*b" : |
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| 322 | tagend = "VW" |
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| 323 | else : |
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| 324 | try : |
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| 325 | tagend = tagsends[tag] |
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| 326 | except KeyError : |
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| 327 | continue # Unsupported PCL tag |
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| 328 | # Now read the numeric argument |
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| 329 | size = 0 |
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| 330 | while 1 : |
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| 331 | char = minfile[pos] ; pos += 1 |
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| 332 | if not char.isdigit() : |
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| 333 | break |
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| 334 | size = (size * 10) + int(char) |
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| 335 | if char in tagend : |
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| 336 | if (tag == "&l") and (char == "X") : # copies for current page |
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| 337 | copies[pagecount] = size |
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| 338 | elif (tag == "&l") and (char == "H") and (size == 0) : |
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| 339 | ejects += 1 # Eject |
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| 340 | elif (tag == "&a") and (size == 2) : |
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| 341 | backsides += 1 # Back side in duplex mode |
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| 342 | else : |
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| 343 | # we just ignore the block. |
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| 344 | if tag == "&n" : |
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| 345 | # we have to take care of the operation id byte |
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| 346 | # which is before the string itself |
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| 347 | size += 1 |
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| 348 | pos += size |
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| 349 | except IndexError : # EOF ? |
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| 350 | minfile.close() # reached EOF |
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| 351 | |
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| 352 | # if pagecount is still 0, we will use the number |
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| 353 | # of resets instead of the number of form feed characters. |
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| 354 | # but the number of resets is always at least 2 with a valid |
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| 355 | # pcl file : one at the very start and one at the very end |
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| 356 | # of the job's data. So we substract 2 from the number of |
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| 357 | # resets. And since on our test data we needed to substract |
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| 358 | # 1 more, we finally substract 3, and will test several |
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| 359 | # PCL files with this. If resets < 2, then the file is |
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| 360 | # probably not a valid PCL file, so we use 0 |
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| 361 | if not pagecount : |
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| 362 | pagecount = (pagecount or ((resets - 3) * (resets > 2))) |
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| 363 | else : |
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| 364 | # here we add counters for other ways new pages may have |
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| 365 | # been printed and ejected by the printer |
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| 366 | pagecount += ejects + backsides |
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| 367 | |
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| 368 | # now handle number of copies for each page (may differ). |
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| 369 | # in duplex mode, number of copies may be sent only once. |
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| 370 | for pnum in range(pagecount) : |
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| 371 | # if no number of copies defined, take the preceding one else the one set before any page else 1. |
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| 372 | nb = copies.get(pnum, copies.get(pnum-1, copies.get(0, 1))) |
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| 373 | pagecount += (nb - 1) |
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| 374 | return pagecount |
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| 375 | |
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| 376 | class PCLXLAnalyzer : |
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| 377 | def __init__(self, infile) : |
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| 378 | """Initialize PCLXL Analyzer.""" |
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| 379 | self.infile = infile |
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| 380 | self.endianness = None |
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| 381 | found = 0 |
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| 382 | while not found : |
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| 383 | line = self.infile.readline() |
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| 384 | if not line : |
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| 385 | break |
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| 386 | if line[1:12] == " HP-PCL XL;" : |
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| 387 | found = 1 |
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| 388 | endian = ord(line[0]) |
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| 389 | if endian == 0x29 : |
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| 390 | self.littleEndian() |
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| 391 | elif endian == 0x28 : |
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| 392 | self.bigEndian() |
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| 393 | # elif endian == 0x27 : TODO : What can we do here ? |
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| 394 | # |
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| 395 | else : |
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| 396 | raise PDLAnalyzerError, "Unknown endianness marker 0x%02x at start !" % endian |
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| 397 | if not found : |
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| 398 | raise PDLAnalyzerError, "This file doesn't seem to be PCLXL (aka PCL6)" |
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| 399 | else : |
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| 400 | # Initialize table of tags |
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| 401 | self.tags = [ 0 ] * 256 |
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| 402 | |
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| 403 | # GhostScript's sources tell us that HP printers |
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| 404 | # only accept little endianness, but we can handle both. |
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| 405 | self.tags[0x28] = self.bigEndian # BigEndian |
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| 406 | self.tags[0x29] = self.littleEndian # LittleEndian |
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| 407 | |
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| 408 | self.tags[0x43] = self.beginPage # BeginPage |
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| 409 | self.tags[0x44] = self.endPage # EndPage |
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| 410 | |
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| 411 | self.tags[0xc0] = 1 # ubyte |
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| 412 | self.tags[0xc1] = 2 # uint16 |
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| 413 | self.tags[0xc2] = 4 # uint32 |
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| 414 | self.tags[0xc3] = 2 # sint16 |
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| 415 | self.tags[0xc4] = 4 # sint32 |
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| 416 | self.tags[0xc5] = 4 # real32 |
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| 417 | |
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| 418 | self.tags[0xc8] = self.array_8 # ubyte_array |
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| 419 | self.tags[0xc9] = self.array_16 # uint16_array |
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| 420 | self.tags[0xca] = self.array_32 # uint32_array |
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| 421 | self.tags[0xcb] = self.array_16 # sint16_array |
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| 422 | self.tags[0xcc] = self.array_32 # sint32_array |
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| 423 | self.tags[0xcd] = self.array_32 # real32_array |
|---|
| 424 | |
|---|
| 425 | self.tags[0xd0] = 2 # ubyte_xy |
|---|
| 426 | self.tags[0xd1] = 4 # uint16_xy |
|---|
| 427 | self.tags[0xd2] = 8 # uint32_xy |
|---|
| 428 | self.tags[0xd3] = 4 # sint16_xy |
|---|
| 429 | self.tags[0xd4] = 8 # sint32_xy |
|---|
| 430 | self.tags[0xd5] = 8 # real32_xy |
|---|
| 431 | |
|---|
| 432 | self.tags[0xe0] = 4 # ubyte_box |
|---|
| 433 | self.tags[0xe1] = 8 # uint16_box |
|---|
| 434 | self.tags[0xe2] = 16 # uint32_box |
|---|
| 435 | self.tags[0xe3] = 8 # sint16_box |
|---|
| 436 | self.tags[0xe4] = 16 # sint32_box |
|---|
| 437 | self.tags[0xe5] = 16 # real32_box |
|---|
| 438 | |
|---|
| 439 | self.tags[0xf8] = 1 # attr_ubyte |
|---|
| 440 | self.tags[0xf9] = 2 # attr_uint16 |
|---|
| 441 | |
|---|
| 442 | self.tags[0xfa] = self.embeddedData # dataLength |
|---|
| 443 | self.tags[0xfb] = self.embeddedDataSmall # dataLengthByte |
|---|
| 444 | |
|---|
| 445 | def beginPage(self) : |
|---|
| 446 | """Indicates the beginning of a new page.""" |
|---|
| 447 | self.pagecount += 1 |
|---|
| 448 | return 0 |
|---|
| 449 | |
|---|
| 450 | def endPage(self) : |
|---|
| 451 | """Indicates the end of a page.""" |
|---|
| 452 | pos = self.pos |
|---|
| 453 | minfile = self.minfile |
|---|
| 454 | if (ord(minfile[pos-3]) == 0xf8) and (ord(minfile[pos-2]) == 0x31) : |
|---|
| 455 | # The EndPage operator is preceded by a PageCopies attribute |
|---|
| 456 | # So set number of copies for current page. |
|---|
| 457 | # From what I read in PCLXL documentation, the number |
|---|
| 458 | # of copies is an unsigned 16 bits integer |
|---|
| 459 | self.copies[self.pagecount] = unpack(self.endianness + "H", minfile[pos-5:pos-3])[0] |
|---|
| 460 | return 0 |
|---|
| 461 | |
|---|
| 462 | def array_8(self) : |
|---|
| 463 | """Handles byte arrays.""" |
|---|
| 464 | pos = self.pos |
|---|
| 465 | datatype = self.minfile[pos] |
|---|
| 466 | pos += 1 |
|---|
| 467 | length = self.tags[ord(datatype)] |
|---|
| 468 | if callable(length) : |
|---|
| 469 | self.pos = pos |
|---|
| 470 | length = length() |
|---|
| 471 | pos = self.pos |
|---|
| 472 | posl = pos + length |
|---|
| 473 | self.pos = posl |
|---|
| 474 | if length == 1 : |
|---|
| 475 | return unpack("B", self.minfile[pos:posl])[0] |
|---|
| 476 | elif length == 2 : |
|---|
| 477 | return unpack(self.endianness + "H", self.minfile[pos:posl])[0] |
|---|
| 478 | elif length == 4 : |
|---|
| 479 | return unpack(self.endianness + "I", self.minfile[pos:posl])[0] |
|---|
| 480 | else : |
|---|
| 481 | raise PDLAnalyzerError, "Error on array size at %s" % self.pos |
|---|
| 482 | |
|---|
| 483 | def array_16(self) : |
|---|
| 484 | """Handles byte arrays.""" |
|---|
| 485 | pos = self.pos |
|---|
| 486 | datatype = self.minfile[pos] |
|---|
| 487 | pos += 1 |
|---|
| 488 | length = self.tags[ord(datatype)] |
|---|
| 489 | if callable(length) : |
|---|
| 490 | self.pos = pos |
|---|
| 491 | length = length() |
|---|
| 492 | pos = self.pos |
|---|
| 493 | posl = pos + length |
|---|
| 494 | self.pos = posl |
|---|
| 495 | if length == 1 : |
|---|
| 496 | return 2 * unpack("B", self.minfile[pos:posl])[0] |
|---|
| 497 | elif length == 2 : |
|---|
| 498 | return 2 * unpack(self.endianness + "H", self.minfile[pos:posl])[0] |
|---|
| 499 | elif length == 4 : |
|---|
| 500 | return 2 * unpack(self.endianness + "I", self.minfile[pos:posl])[0] |
|---|
| 501 | else : |
|---|
| 502 | raise PDLAnalyzerError, "Error on array size at %s" % self.pos |
|---|
| 503 | |
|---|
| 504 | def array_32(self) : |
|---|
| 505 | """Handles byte arrays.""" |
|---|
| 506 | pos = self.pos |
|---|
| 507 | datatype = self.minfile[pos] |
|---|
| 508 | pos += 1 |
|---|
| 509 | length = self.tags[ord(datatype)] |
|---|
| 510 | if callable(length) : |
|---|
| 511 | self.pos = pos |
|---|
| 512 | length = length() |
|---|
| 513 | pos = self.pos |
|---|
| 514 | posl = pos + length |
|---|
| 515 | self.pos = posl |
|---|
| 516 | if length == 1 : |
|---|
| 517 | return 4 * unpack("B", self.minfile[pos:posl])[0] |
|---|
| 518 | elif length == 2 : |
|---|
| 519 | return 4 * unpack(self.endianness + "H", self.minfile[pos:posl])[0] |
|---|
| 520 | elif length == 4 : |
|---|
| 521 | return 4 * unpack(self.endianness + "I", self.minfile[pos:posl])[0] |
|---|
| 522 | else : |
|---|
| 523 | raise PDLAnalyzerError, "Error on array size at %s" % self.pos |
|---|
| 524 | |
|---|
| 525 | def embeddedDataSmall(self) : |
|---|
| 526 | """Handle small amounts of data.""" |
|---|
| 527 | pos = self.pos |
|---|
| 528 | length = ord(self.minfile[pos]) |
|---|
| 529 | self.pos = pos + 1 |
|---|
| 530 | return length |
|---|
| 531 | |
|---|
| 532 | def embeddedData(self) : |
|---|
| 533 | """Handle normal amounts of data.""" |
|---|
| 534 | pos = self.pos |
|---|
| 535 | pos4 = pos + 4 |
|---|
| 536 | self.pos = pos4 |
|---|
| 537 | return unpack(self.endianness + "I", self.minfile[pos:pos4])[0] |
|---|
| 538 | |
|---|
| 539 | def littleEndian(self) : |
|---|
| 540 | """Toggles to little endianness.""" |
|---|
| 541 | self.endianness = "<" # little endian |
|---|
| 542 | return 0 |
|---|
| 543 | |
|---|
| 544 | def bigEndian(self) : |
|---|
| 545 | """Toggles to big endianness.""" |
|---|
| 546 | self.endianness = ">" # big endian |
|---|
| 547 | return 0 |
|---|
| 548 | |
|---|
| 549 | def getJobSize(self) : |
|---|
| 550 | """Counts pages in a PCLXL (PCL6) document. |
|---|
| 551 | |
|---|
| 552 | Algorithm by Jerome Alet. |
|---|
| 553 | |
|---|
| 554 | The documentation used for this was : |
|---|
| 555 | |
|---|
| 556 | HP PCL XL Feature Reference |
|---|
| 557 | Protocol Class 2.0 |
|---|
| 558 | http://www.hpdevelopersolutions.com/downloads/64/358/xl_ref20r22.pdf |
|---|
| 559 | """ |
|---|
| 560 | infileno = self.infile.fileno() |
|---|
| 561 | self.copies = {} |
|---|
| 562 | self.minfile = minfile = mmap.mmap(infileno, os.fstat(infileno)[6], prot=mmap.PROT_READ, flags=mmap.MAP_SHARED) |
|---|
| 563 | tags = self.tags |
|---|
| 564 | self.pagecount = 0 |
|---|
| 565 | self.pos = pos = self.infile.tell() |
|---|
| 566 | try : |
|---|
| 567 | while 1 : |
|---|
| 568 | char = minfile[pos] |
|---|
| 569 | pos += 1 |
|---|
| 570 | length = tags[ord(char)] |
|---|
| 571 | if not length : |
|---|
| 572 | continue |
|---|
| 573 | if callable(length) : |
|---|
| 574 | self.pos = pos |
|---|
| 575 | length = length() |
|---|
| 576 | pos = self.pos |
|---|
| 577 | pos += length |
|---|
| 578 | except IndexError : # EOF ? |
|---|
| 579 | self.minfile.close() # reached EOF |
|---|
| 580 | |
|---|
| 581 | # now handle number of copies for each page (may differ). |
|---|
| 582 | for pnum in range(1, self.pagecount + 1) : |
|---|
| 583 | # if no number of copies defined, take 1, as explained |
|---|
| 584 | # in PCLXL documentation. |
|---|
| 585 | # NB : is number of copies is 0, the page won't be output |
|---|
| 586 | # but the formula below is still correct : we want |
|---|
| 587 | # to decrease the total number of pages in this case. |
|---|
| 588 | self.pagecount += (self.copies.get(pnum, 1) - 1) |
|---|
| 589 | |
|---|
| 590 | return self.pagecount |
|---|
| 591 | |
|---|
| 592 | class PDLAnalyzer : |
|---|
| 593 | """Generic PDL Analyzer class.""" |
|---|
| 594 | def __init__(self, filename) : |
|---|
| 595 | """Initializes the PDL analyzer. |
|---|
| 596 | |
|---|
| 597 | filename is the name of the file or '-' for stdin. |
|---|
| 598 | filename can also be a file-like object which |
|---|
| 599 | supports read() and seek(). |
|---|
| 600 | """ |
|---|
| 601 | self.filename = filename |
|---|
| 602 | try : |
|---|
| 603 | import psyco |
|---|
| 604 | except ImportError : |
|---|
| 605 | pass # Psyco is not installed |
|---|
| 606 | else : |
|---|
| 607 | # Psyco is installed, tell it to compile |
|---|
| 608 | # the CPU intensive methods : PCL and PCLXL |
|---|
| 609 | # parsing will greatly benefit from this, |
|---|
| 610 | # for PostScript and PDF the difference is |
|---|
| 611 | # barely noticeable since they are already |
|---|
| 612 | # almost optimal, and much more speedy anyway. |
|---|
| 613 | psyco.bind(PostScriptAnalyzer.getJobSize) |
|---|
| 614 | psyco.bind(PDFAnalyzer.getJobSize) |
|---|
| 615 | psyco.bind(PCLAnalyzer.getJobSize) |
|---|
| 616 | psyco.bind(PCLXLAnalyzer.getJobSize) |
|---|
| 617 | |
|---|
| 618 | def getJobSize(self) : |
|---|
| 619 | """Returns the job's size.""" |
|---|
| 620 | self.openFile() |
|---|
| 621 | try : |
|---|
| 622 | pdlhandler = self.detectPDLHandler() |
|---|
| 623 | except PDLAnalyzerError, msg : |
|---|
| 624 | self.closeFile() |
|---|
| 625 | raise PDLAnalyzerError, "ERROR : Unknown file format for %s (%s)" % (self.filename, msg) |
|---|
| 626 | else : |
|---|
| 627 | try : |
|---|
| 628 | size = pdlhandler(self.infile).getJobSize() |
|---|
| 629 | finally : |
|---|
| 630 | self.closeFile() |
|---|
| 631 | return size |
|---|
| 632 | |
|---|
| 633 | def openFile(self) : |
|---|
| 634 | """Opens the job's data stream for reading.""" |
|---|
| 635 | self.mustclose = 0 # by default we don't want to close the file when finished |
|---|
| 636 | if hasattr(self.filename, "read") and hasattr(self.filename, "seek") : |
|---|
| 637 | # filename is in fact a file-like object |
|---|
| 638 | infile = self.filename |
|---|
| 639 | elif self.filename == "-" : |
|---|
| 640 | # we must read from stdin |
|---|
| 641 | infile = sys.stdin |
|---|
| 642 | else : |
|---|
| 643 | # normal file |
|---|
| 644 | self.infile = open(self.filename, "rb") |
|---|
| 645 | self.mustclose = 1 |
|---|
| 646 | return |
|---|
| 647 | |
|---|
| 648 | # Use a temporary file, always seekable contrary to standard input. |
|---|
| 649 | self.infile = tempfile.TemporaryFile(mode="w+b") |
|---|
| 650 | while 1 : |
|---|
| 651 | data = infile.read(MEGABYTE) |
|---|
| 652 | if not data : |
|---|
| 653 | break |
|---|
| 654 | self.infile.write(data) |
|---|
| 655 | self.infile.flush() |
|---|
| 656 | self.infile.seek(0) |
|---|
| 657 | |
|---|
| 658 | def closeFile(self) : |
|---|
| 659 | """Closes the job's data stream if we can close it.""" |
|---|
| 660 | if self.mustclose : |
|---|
| 661 | self.infile.close() |
|---|
| 662 | else : |
|---|
| 663 | # if we don't have to close the file, then |
|---|
| 664 | # ensure the file pointer is reset to the |
|---|
| 665 | # start of the file in case the process wants |
|---|
| 666 | # to read the file again. |
|---|
| 667 | try : |
|---|
| 668 | self.infile.seek(0) |
|---|
| 669 | except : |
|---|
| 670 | pass # probably stdin, which is not seekable |
|---|
| 671 | |
|---|
| 672 | def isPostScript(self, data) : |
|---|
| 673 | """Returns 1 if data is PostScript, else 0.""" |
|---|
| 674 | if data.startswith("%!") or \ |
|---|
| 675 | data.startswith("\004%!") or \ |
|---|
| 676 | data.startswith("\033%-12345X%!PS") or \ |
|---|
| 677 | ((data[:128].find("\033%-12345X") != -1) and \ |
|---|
| 678 | ((data.find("LANGUAGE=POSTSCRIPT") != -1) or \ |
|---|
| 679 | (data.find("LANGUAGE = POSTSCRIPT") != -1) or \ |
|---|
| 680 | (data.find("LANGUAGE = Postscript") != -1))) or \ |
|---|
| 681 | (data.find("%!PS-Adobe") != -1) : |
|---|
| 682 | return 1 |
|---|
| 683 | else : |
|---|
| 684 | return 0 |
|---|
| 685 | |
|---|
| 686 | def isPDF(self, data) : |
|---|
| 687 | """Returns 1 if data is PDF, else 0.""" |
|---|
| 688 | if data.startswith("%PDF-") or \ |
|---|
| 689 | data.startswith("\033%-12345X%PDF-") or \ |
|---|
| 690 | ((data[:128].find("\033%-12345X") != -1) and (data.upper().find("LANGUAGE=PDF") != -1)) or \ |
|---|
| 691 | (data.find("%PDF-") != -1) : |
|---|
| 692 | return 1 |
|---|
| 693 | else : |
|---|
| 694 | return 0 |
|---|
| 695 | |
|---|
| 696 | def isPCL(self, data) : |
|---|
| 697 | """Returns 1 if data is PCL, else 0.""" |
|---|
| 698 | if data.startswith("\033E\033") or \ |
|---|
| 699 | (data[:128].find("\033%-12345X") != -1) : |
|---|
| 700 | return 1 |
|---|
| 701 | else : |
|---|
| 702 | return 0 |
|---|
| 703 | |
|---|
| 704 | def isPCLXL(self, data) : |
|---|
| 705 | """Returns 1 if data is PCLXL aka PCL6, else 0.""" |
|---|
| 706 | if ((data[:128].find("\033%-12345X") != -1) and \ |
|---|
| 707 | (data.find(" HP-PCL XL;") != -1) and \ |
|---|
| 708 | ((data.find("LANGUAGE=PCLXL") != -1) or \ |
|---|
| 709 | (data.find("LANGUAGE = PCLXL") != -1))) : |
|---|
| 710 | return 1 |
|---|
| 711 | else : |
|---|
| 712 | return 0 |
|---|
| 713 | |
|---|
| 714 | def isESCP2(self, data) : |
|---|
| 715 | """Returns 1 if data is ESC/P2, else 0.""" |
|---|
| 716 | if data.startswith("\033@") or \ |
|---|
| 717 | data.startswith("\n\033@") : |
|---|
| 718 | #data.startswith("\033*") or |
|---|
| 719 | return 1 |
|---|
| 720 | else : |
|---|
| 721 | return 0 |
|---|
| 722 | |
|---|
| 723 | def detectPDLHandler(self) : |
|---|
| 724 | """Tries to autodetect the document format. |
|---|
| 725 | |
|---|
| 726 | Returns the correct PDL handler class or None if format is unknown |
|---|
| 727 | """ |
|---|
| 728 | # Try to detect file type by reading first block of datas |
|---|
| 729 | self.infile.seek(0) |
|---|
| 730 | firstblock = self.infile.read(KILOBYTE) |
|---|
| 731 | self.infile.seek(0) |
|---|
| 732 | if self.isPostScript(firstblock) : |
|---|
| 733 | return PostScriptAnalyzer |
|---|
| 734 | elif self.isPCLXL(firstblock) : |
|---|
| 735 | return PCLXLAnalyzer |
|---|
| 736 | elif self.isPDF(firstblock) : |
|---|
| 737 | return PDFAnalyzer |
|---|
| 738 | elif self.isPCL(firstblock) : |
|---|
| 739 | return PCLAnalyzer |
|---|
| 740 | elif self.isESCP2(firstblock) : |
|---|
| 741 | return ESCP2Analyzer |
|---|
| 742 | else : |
|---|
| 743 | raise PDLAnalyzerError, "Analysis of first data block failed." |
|---|
| 744 | |
|---|
| 745 | def main() : |
|---|
| 746 | """Entry point for PDL Analyzer.""" |
|---|
| 747 | if (len(sys.argv) < 2) or ((not sys.stdin.isatty()) and ("-" not in sys.argv[1:])) : |
|---|
| 748 | sys.argv.append("-") |
|---|
| 749 | |
|---|
| 750 | totalsize = 0 |
|---|
| 751 | for arg in sys.argv[1:] : |
|---|
| 752 | try : |
|---|
| 753 | parser = PDLAnalyzer(arg) |
|---|
| 754 | totalsize += parser.getJobSize() |
|---|
| 755 | except PDLAnalyzerError, msg : |
|---|
| 756 | sys.stderr.write("ERROR: %s\n" % msg) |
|---|
| 757 | sys.stderr.flush() |
|---|
| 758 | print "%s" % totalsize |
|---|
| 759 | |
|---|
| 760 | if __name__ == "__main__" : |
|---|
| 761 | main() |
|---|
