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 1.7 2004/06/18 17:48:04 jalet |
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25 | # Added native fast PDF parsing method |
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26 | # |
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27 | # Revision 1.6 2004/06/18 14:00:16 jalet |
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28 | # Added PDF support in smart PDL analyzer (through GhostScript for now) |
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29 | # |
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30 | # Revision 1.5 2004/06/18 10:09:05 jalet |
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31 | # Resets file pointer to start of file in all cases |
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32 | # |
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33 | # Revision 1.4 2004/06/18 06:16:14 jalet |
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34 | # Fixes PostScript detection code for incorrect drivers |
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35 | # |
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36 | # Revision 1.3 2004/05/21 20:40:08 jalet |
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37 | # All the code for pkpgcounter is now in pdlanalyzer.py |
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38 | # |
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39 | # Revision 1.2 2004/05/19 19:09:36 jalet |
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40 | # Speed improvement |
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41 | # |
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42 | # Revision 1.1 2004/05/18 09:59:54 jalet |
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43 | # pkpgcounter is now just a wrapper around the PDLAnalyzer class |
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44 | # |
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45 | # |
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46 | # |
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47 | |
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48 | import sys |
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49 | import os |
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50 | import struct |
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51 | import tempfile |
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52 | import popen2 |
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53 | |
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54 | KILOBYTE = 1024 |
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55 | MEGABYTE = 1024 * KILOBYTE |
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56 | |
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57 | class PDLAnalyzerError(Exception): |
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58 | """An exception for PDL Analyzer related stuff.""" |
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59 | def __init__(self, message = ""): |
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60 | self.message = message |
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61 | Exception.__init__(self, message) |
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62 | def __repr__(self): |
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63 | return self.message |
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64 | __str__ = __repr__ |
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65 | |
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66 | class PostScriptAnalyzer : |
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67 | def __init__(self, infile) : |
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68 | """Initialize PostScript Analyzer.""" |
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69 | self.infile = infile |
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70 | |
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71 | def getJobSize(self) : |
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72 | """Count pages in a DSC compliant PostScript document.""" |
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73 | pagecount = 0 |
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74 | while 1 : |
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75 | line = self.infile.readline() |
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76 | if not line : |
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77 | break |
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78 | if line.startswith("%%Page: ") : |
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79 | pagecount += 1 |
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80 | return pagecount |
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81 | |
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82 | class PDFAnalyzer : |
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83 | def __init__(self, infile) : |
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84 | """Initialize PDF Analyzer.""" |
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85 | self.infile = infile |
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86 | try : |
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87 | if float(sys.version[:3]) >= 2.3 : |
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88 | self.getJobSize = self.native_getJobSize |
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89 | else : |
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90 | self.getJobSize = self.gs_getJobSize |
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91 | except : |
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92 | self.getJobSize = self.gs_getJobSize |
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93 | |
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94 | def native_getJobSize(self) : |
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95 | """Counts pages in a PDF document natively.""" |
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96 | pagecount = 0 |
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97 | content = [] |
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98 | while 1 : |
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99 | line = self.infile.readline() |
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100 | if not line : |
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101 | break |
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102 | line = line.strip() |
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103 | content.append(line) |
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104 | if line.endswith("endobj") : |
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105 | pagecount += " /".join([x.strip() for x in " ".join(content).split("/")]).count(" /Type /Page ") |
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106 | content = [] |
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107 | return pagecount |
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108 | |
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109 | def gs_getJobSize(self) : |
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110 | """Counts pages in a PDF document using GhostScript to convert PDF to PS.""" |
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111 | MEGABYTE = 1024*1024 |
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112 | child = popen2.Popen4("gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pswrite -sOutputFile=- -c save pop -f - 2>/dev/null") |
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113 | try : |
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114 | data = self.infile.read(MEGABYTE) |
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115 | while data : |
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116 | child.tochild.write(data) |
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117 | data = self.infile.read(MEGABYTE) |
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118 | child.tochild.flush() |
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119 | child.tochild.close() |
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120 | except (IOError, OSError), msg : |
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121 | raise PDLAnalyzerError, "Unable to convert PDF input to PS with GhostScript : %s" % msg |
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122 | |
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123 | psanalyzer = PostScriptAnalyzer(child.fromchild) |
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124 | pagecount = psanalyzer.getJobSize() |
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125 | child.fromchild.close() |
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126 | try : |
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127 | retcode = child.wait() |
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128 | except OSError, msg : |
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129 | self.filter.logger.log_message(_("Problem while waiting for PDF to PS converter (GhostScript pid %s) to exit : %s") % (child.pid, msg)) |
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130 | else : |
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131 | if os.WIFEXITED(retcode) : |
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132 | status = os.WEXITSTATUS(retcode) |
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133 | else : |
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134 | status = retcode |
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135 | if status : |
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136 | raise PDLAnalyzerError, "PDF to PS converter (GhostScript pid %s) exit code is %s" % (child.pid, repr(status)) |
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137 | return pagecount |
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138 | |
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139 | class PCLAnalyzer : |
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140 | def __init__(self, infile) : |
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141 | """Initialize PCL Analyzer.""" |
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142 | self.infile = infile |
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143 | |
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144 | def skip(self, nb) : |
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145 | """Reads a new datablock.""" |
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146 | newpos = self.pos + nb |
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147 | if newpos >= self.len : |
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148 | oldlen = self.len |
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149 | self.data = self.infile.read(MEGABYTE) |
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150 | self.len = len(self.data) |
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151 | if not self.len : |
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152 | return |
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153 | self.pos = newpos - oldlen |
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154 | else : |
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155 | self.pos = newpos |
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156 | |
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157 | def readone(self) : |
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158 | """Reads a new byte.""" |
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159 | if self.pos < self.len : |
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160 | char = self.data[self.pos] |
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161 | else : |
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162 | self.data = self.infile.read(MEGABYTE) |
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163 | self.len = len(self.data) |
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164 | self.pos = 0 |
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165 | if not self.len : |
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166 | return |
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167 | char = self.data[0] |
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168 | self.pos += 1 |
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169 | return char |
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170 | |
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171 | def getJobSize(self) : |
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172 | """Count pages in a PCL5 document.""" |
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173 | # |
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174 | # Algorithm from pclcount |
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175 | # (c) 2003, by Eduardo Gielamo Oliveira & Rodolfo Broco Manin |
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176 | # published under the terms of the GNU General Public Licence v2. |
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177 | # |
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178 | # Backported from C to Python by Jerome Alet, then enhanced |
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179 | # with more PCL tags detected. I think all the necessary PCL tags |
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180 | # are recognized to correctly handle PCL5 files wrt their number |
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181 | # of pages. The documentation used for this was : |
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182 | # |
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183 | # HP PCL/PJL Reference Set |
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184 | # PCL5 Printer Language Technical Quick Reference Guide |
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185 | # http://h20000.www2.hp.com/bc/docs/support/SupportManual/bpl13205/bpl13205.pdf |
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186 | # |
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187 | tagsends = { "&n" : "W", |
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188 | "&b" : "W", |
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189 | "*i" : "W", |
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190 | "*l" : "W", |
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191 | "*m" : "W", |
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192 | "*v" : "W", |
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193 | "*c" : "W", |
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194 | "(f" : "W", |
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195 | "*b" : "VW", |
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196 | "(s" : "W", |
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197 | ")s" : "W", |
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198 | "&p" : "X", |
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199 | "&l" : "X" } |
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200 | self.data = [] |
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201 | self.pos = self.len = 0 |
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202 | copies = 1 |
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203 | pagecount = resets = 0 |
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204 | tag = None |
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205 | while 1 : |
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206 | char = self.readone() |
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207 | if not char : # EOF ? |
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208 | break |
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209 | if char == "\014" : |
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210 | pagecount += 1 |
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211 | elif char == "\033" : |
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212 | # |
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213 | # <ESC>*b###W -> Start of a raster data row/block |
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214 | # <ESC>*b###V -> Start of a raster data plane |
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215 | # <ESC>*c###W -> Start of a user defined pattern |
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216 | # <ESC>*i###W -> Start of a viewing illuminant block |
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217 | # <ESC>*l###W -> Start of a color lookup table |
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218 | # <ESC>*m###W -> Start of a download dither matrix block |
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219 | # <ESC>*v###W -> Start of a configure image data block |
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220 | # <ESC>(s###W -> Start of a characters description block |
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221 | # <ESC>)s###W -> Start of a fonts description block |
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222 | # <ESC>(f###W -> Start of a symbol set block |
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223 | # <ESC>&b###W -> Start of configuration data block |
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224 | # <ESC>&l###X -> Number of copies |
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225 | # <ESC>&n###W -> Starts an alphanumeric string ID block |
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226 | # <ESC>&p###X -> Start of a non printable characters block |
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227 | # |
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228 | tagstart = self.readone() |
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229 | if tagstart in "E9=YZ" : # one byte PCL tag |
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230 | if tagstart == "E" : |
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231 | resets += 1 |
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232 | continue # skip to next tag |
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233 | tag = tagstart + self.readone() |
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234 | try : |
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235 | tagend = tagsends[tag] |
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236 | except KeyError : |
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237 | pass # Unsupported PCL tag |
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238 | else : |
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239 | # Now read the numeric argument |
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240 | size = 0 |
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241 | while 1 : |
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242 | char = self.readone() |
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243 | if not char.isdigit() : |
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244 | break |
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245 | size = (size * 10) + int(char) |
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246 | if char in tagend : |
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247 | if tag == "&l" : |
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248 | copies = size |
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249 | else : |
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250 | # doing a read will prevent the seek |
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251 | # for unseekable streams. |
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252 | # we just ignore the block anyway. |
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253 | if tag == "&n" : |
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254 | # we have to take care of the operation id byte |
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255 | # which is before the string itself |
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256 | size += 1 |
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257 | self.skip(size) |
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258 | |
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259 | # if pagecount is still 0, we will return the number |
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260 | # of resets instead of the number of form feed characters. |
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261 | # but the number of resets is always at least 2 with a valid |
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262 | # pcl file : one at the very start and one at the very end |
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263 | # of the job's data. So we substract 2 from the number of |
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264 | # resets. And since on our test data we needed to substract |
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265 | # 1 more, we finally substract 3, and will test several |
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266 | # PCL files with this. If resets < 2, then the file is |
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267 | # probably not a valid PCL file, so we return 0 |
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268 | return copies * (pagecount or ((resets - 3) * (resets > 2))) |
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269 | |
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270 | class PCLXLAnalyzer : |
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271 | def __init__(self, infile) : |
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272 | """Initialize PCLXL Analyzer.""" |
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273 | raise PDLAnalyzerError, "PCLXL (aka PCL6) is not supported yet." |
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274 | self.infile = infile |
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275 | self.islittleendian = None |
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276 | found = 0 |
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277 | while not found : |
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278 | line = self.infile.readline() |
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279 | if not line : |
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280 | break |
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281 | if line[1:12] == " HP-PCL XL;" : |
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282 | found = 1 |
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283 | if line[0] == ")" : |
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284 | self.littleendian() |
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285 | elif line[0] == "(" : |
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286 | self.bigendian() |
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287 | if not found : |
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288 | raise PDLAnalyzerError, "This file doesn't seem to be PCLXL (aka PCL6)" |
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289 | else : |
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290 | self.tags = [lambda: None] * 256 |
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291 | self.tags[0x28] = self.bigendian # big endian |
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292 | self.tags[0x29] = self.littleendian # big endian |
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293 | self.tags[0x43] = self.beginPage # BeginPage |
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294 | self.tags[0x44] = self.endPage # EndPage |
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295 | |
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296 | self.tags[0xc0] = lambda: 1 # ubyte |
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297 | self.tags[0xc1] = lambda: 2 # uint16 |
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298 | self.tags[0xc2] = lambda: 4 # uint32 |
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299 | self.tags[0xc3] = lambda: 2 # sint16 |
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300 | self.tags[0xc4] = lambda: 4 # sint32 |
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301 | self.tags[0xc5] = lambda: 4 # real32 |
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302 | |
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303 | self.tags[0xc8] = self.array_8 # ubyte_array |
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304 | self.tags[0xc9] = self.array_16 # uint16_array |
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305 | self.tags[0xca] = self.array_32 # uint32_array |
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306 | self.tags[0xcb] = self.array_16 # sint16_array |
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307 | self.tags[0xcc] = self.array_32 # sint32_array |
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308 | self.tags[0xcd] = self.array_32 # real32_array |
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309 | |
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310 | self.tags[0xd0] = lambda: 2 # ubyte_xy |
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311 | self.tags[0xd1] = lambda: 4 # uint16_xy |
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312 | self.tags[0xd2] = lambda: 8 # uint32_xy |
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313 | self.tags[0xd3] = lambda: 4 # sint16_xy |
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314 | self.tags[0xd4] = lambda: 8 # sint32_xy |
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315 | self.tags[0xd5] = lambda: 8 # real32_xy |
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316 | |
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317 | self.tags[0xd0] = lambda: 4 # ubyte_box |
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318 | self.tags[0xd1] = lambda: 8 # uint16_box |
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319 | self.tags[0xd2] = lambda: 16 # uint32_box |
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320 | self.tags[0xd3] = lambda: 8 # sint16_box |
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321 | self.tags[0xd4] = lambda: 16 # sint32_box |
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322 | self.tags[0xd5] = lambda: 16 # real32_box |
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323 | |
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324 | self.tags[0xf8] = lambda: 1 # attr_ubyte |
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325 | self.tags[0xf9] = lambda: 2 # attr_uint16 |
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326 | |
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327 | self.tags[0xfa] = self.embeddedData # dataLength |
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328 | self.tags[0xfb] = self.embeddedDataSmall # dataLengthByte |
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329 | |
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330 | def debug(self, msg) : |
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331 | """Outputs a debug message on stderr.""" |
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332 | sys.stderr.write("%s\n" % msg) |
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333 | sys.stderr.flush() |
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334 | |
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335 | def beginPage(self) : |
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336 | """Indicates the beginning of a new page.""" |
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337 | self.pagecount += 1 |
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338 | self.debug("Begin page %i at %s" % (self.pagecount, self.infile.tell())) |
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339 | |
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340 | def endPage(self) : |
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341 | """Indicates the end of a page.""" |
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342 | self.debug("End page %i at %s" % (self.pagecount, self.infile.tell())) |
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343 | |
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344 | def handleArray(self, itemsize) : |
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345 | """Handles arrays.""" |
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346 | pos = self.infile.tell() |
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347 | datatype = self.infile.read(1) |
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348 | length = self.tags[ord(datatype)]() |
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349 | if length is None : |
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350 | self.debug("Bogus array length at %s" % pos) |
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351 | else : |
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352 | sarraysize = self.infile.read(length) |
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353 | if self.islittleendian : |
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354 | fmt = "<" |
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355 | else : |
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356 | fmt = ">" |
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357 | if length == 1 : |
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358 | fmt += "B" |
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359 | elif length == 2 : |
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360 | fmt += "H" |
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361 | elif length == 4 : |
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362 | fmt += "I" |
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363 | else : |
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364 | raise PDLAnalyzerError, "Error on array size at %s" % self.infile.tell() |
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365 | arraysize = struct.unpack(fmt, sarraysize)[0] |
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366 | self.debug("Array at %s, itemsize %s, datatype 0x%02x, size %s" % (pos, itemsize, ord(datatype), arraysize)) |
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367 | return arraysize * itemsize |
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368 | |
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369 | def array_8(self) : |
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370 | """Handles byte arrays.""" |
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371 | return self.handleArray(1) |
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372 | |
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373 | def array_16(self) : |
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374 | """Handles byte arrays.""" |
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375 | return self.handleArray(2) |
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376 | |
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377 | def array_32(self) : |
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378 | """Handles byte arrays.""" |
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379 | return self.handleArray(4) |
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380 | |
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381 | def embeddedDataSmall(self) : |
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382 | """Handle small amounts of data.""" |
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383 | pos = self.infile.tell() |
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384 | val = ord(self.infile.read(1)) |
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385 | self.debug("smalldatablock at %s (0x%02x)" % (pos, val)) |
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386 | return val |
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387 | |
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388 | def embeddedData(self) : |
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389 | """Handle normal amounts of data.""" |
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390 | if self.islittleendian : |
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391 | fmt = "<I" |
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392 | else : |
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393 | fmt = ">I" |
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394 | pos = self.infile.tell() |
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395 | val = struct.unpack(fmt, self.infile.read(4))[0] |
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396 | self.debug("datablock at %s (0x%08x)" % (pos, val)) |
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397 | return val |
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398 | |
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399 | def littleendian(self) : |
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400 | """Toggles to little endianness.""" |
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401 | self.islittleendian = 1 # little endian |
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402 | |
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403 | def bigendian(self) : |
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404 | """Toggles to big endianness.""" |
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405 | self.islittleendian = 0 # big endian |
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406 | |
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407 | def getJobSize(self) : |
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408 | """Counts pages in a PCLXL (PCL6) document.""" |
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409 | self.pagecount = 0 |
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410 | while 1 : |
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411 | char = self.infile.read(1) |
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412 | if not char : |
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413 | break |
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414 | index = ord(char) |
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415 | length = self.tags[index]() |
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416 | if length : |
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417 | self.infile.read(length) |
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418 | return self.pagecount |
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419 | |
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420 | class PDLAnalyzer : |
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421 | """Generic PDL Analyzer class.""" |
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422 | def __init__(self, filename) : |
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423 | """Initializes the PDL analyzer. |
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424 | |
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425 | filename is the name of the file or '-' for stdin. |
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426 | filename can also be a file-like object which |
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427 | supports read() and seek(). |
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428 | """ |
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429 | self.filename = filename |
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430 | |
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431 | def getJobSize(self) : |
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432 | """Returns the job's size.""" |
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433 | self.openFile() |
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434 | try : |
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435 | pdlhandler = self.detectPDLHandler() |
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436 | except PDLAnalyzerError, msg : |
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437 | self.closeFile() |
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438 | raise PDLAnalyzerError, "ERROR : Unknown file format for %s (%s)" % (self.filename, msg) |
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439 | else : |
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440 | try : |
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441 | size = pdlhandler(self.infile).getJobSize() |
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442 | finally : |
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443 | self.closeFile() |
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444 | return size |
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445 | |
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446 | def openFile(self) : |
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447 | """Opens the job's data stream for reading.""" |
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448 | self.mustclose = 0 # by default we don't want to close the file when finished |
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449 | if hasattr(self.filename, "read") and hasattr(self.filename, "seek") : |
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450 | # filename is in fact a file-like object |
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451 | infile = self.filename |
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452 | elif self.filename == "-" : |
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453 | # we must read from stdin |
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454 | infile = sys.stdin |
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455 | else : |
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456 | # normal file |
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457 | self.infile = open(self.filename, "rbU") # TODO : "U" mode only works in 2.3, is ignored in 2.1 and 2.2 |
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458 | self.mustclose = 1 |
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459 | return |
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460 | |
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461 | # Use a temporary file, always seekable contrary to standard input. |
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462 | # This also has the benefit to let us use the "U" mode (new in Python 2.3) |
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463 | self.infile = tempfile.TemporaryFile(mode="w+bU") # TODO : "U" mode only works in 2.3, is ignored in 2.1 and 2.2 |
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464 | while 1 : |
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465 | data = infile.read(MEGABYTE) |
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466 | if not data : |
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467 | break |
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468 | self.infile.write(data) |
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469 | self.infile.flush() |
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470 | self.infile.seek(0) |
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471 | |
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472 | def closeFile(self) : |
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473 | """Closes the job's data stream if we can close it.""" |
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474 | if self.mustclose : |
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475 | self.infile.close() |
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476 | else : |
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477 | # if we don't have to close the file, then |
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478 | # ensure the file pointer is reset to the |
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479 | # start of the file in case the process wants |
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480 | # to read the file again. |
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481 | try : |
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482 | self.infile.seek(0) |
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483 | except : |
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484 | pass # probably stdin, which is not seekable |
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485 | |
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486 | def isPostScript(self, data) : |
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487 | """Returns 1 if data is PostScript, else 0.""" |
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488 | if data.startswith("%!") or \ |
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489 | data.startswith("\004%!") or \ |
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490 | data.startswith("\033%-12345X%!PS") or \ |
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491 | ((data[:128].find("\033%-12345X") != -1) and \ |
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492 | ((data.find("LANGUAGE=POSTSCRIPT") != -1) or \ |
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493 | (data.find("LANGUAGE = POSTSCRIPT") != -1) or \ |
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494 | (data.find("LANGUAGE = Postscript") != -1))) or \ |
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495 | (data.find("%!PS-Adobe") != -1) : |
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496 | return 1 |
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497 | else : |
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498 | return 0 |
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499 | |
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500 | def isPDF(self, data) : |
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501 | """Returns 1 if data is PDF, else 0.""" |
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502 | if data.startswith("%PDF-") or \ |
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503 | data.startswith("\033%-12345X%PDF-") or \ |
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504 | ((data[:128].find("\033%-12345X") != -1) and (data.upper().find("LANGUAGE=PDF") != -1)) or \ |
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505 | (data.find("%PDF-") != -1) : |
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506 | return 1 |
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507 | else : |
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508 | return 0 |
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509 | |
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510 | def isPCL(self, data) : |
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511 | """Returns 1 if data is PCL, else 0.""" |
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512 | if data.startswith("\033E\033") or \ |
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513 | ((data[:128].find("\033%-12345X") != -1) and \ |
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514 | ((data.find("LANGUAGE=PCL") != -1) or \ |
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515 | (data.find("LANGUAGE = PCL") != -1) or \ |
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516 | (data.find("LANGUAGE = Pcl") != -1))) : |
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517 | return 1 |
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518 | else : |
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519 | return 0 |
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520 | |
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521 | def isPCLXL(self, data) : |
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522 | """Returns 1 if data is PCLXL aka PCL6, else 0.""" |
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523 | if ((data[:128].find("\033%-12345X") != -1) and \ |
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524 | (data.find(" HP-PCL XL;") != -1) and \ |
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525 | ((data.find("LANGUAGE=PCLXL") != -1) or \ |
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526 | (data.find("LANGUAGE = PCLXL") != -1))) : |
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527 | return 1 |
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528 | else : |
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529 | return 0 |
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530 | |
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531 | def detectPDLHandler(self) : |
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532 | """Tries to autodetect the document format. |
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533 | |
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534 | Returns the correct PDL handler class or None if format is unknown |
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535 | """ |
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536 | # Try to detect file type by reading first block of datas |
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537 | self.infile.seek(0) |
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538 | firstblock = self.infile.read(KILOBYTE) |
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539 | self.infile.seek(0) |
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540 | if self.isPostScript(firstblock) : |
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541 | return PostScriptAnalyzer |
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542 | elif self.isPCLXL(firstblock) : |
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543 | return PCLXLAnalyzer |
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544 | elif self.isPCL(firstblock) : |
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545 | return PCLAnalyzer |
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546 | elif self.isPDF(firstblock) : |
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547 | return PDFAnalyzer |
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548 | else : |
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549 | raise PDLAnalyzerError, "Analysis of first data block failed." |
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550 | |
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551 | def main() : |
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552 | """Entry point for PDL Analyzer.""" |
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553 | if (len(sys.argv) < 2) or ((not sys.stdin.isatty()) and ("-" not in sys.argv[1:])) : |
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554 | sys.argv.append("-") |
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555 | |
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556 | totalsize = 0 |
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557 | for arg in sys.argv[1:] : |
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558 | try : |
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559 | parser = PDLAnalyzer(arg) |
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560 | totalsize += parser.getJobSize() |
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561 | except PDLAnalyzerError, msg : |
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562 | sys.stderr.write("%s\n" % msg) |
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563 | sys.stderr.flush() |
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564 | print "%s" % totalsize |
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565 | |
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566 | if __name__ == "__main__" : |
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567 | main() |
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