[564] | 1 | # -*- coding: UTF-8 -*- |
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[252] | 2 | # |
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| 3 | # pkpgcounter : a generic Page Description Language parser |
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| 4 | # |
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[564] | 5 | # (c) 2003, 2004, 2005, 2006, 2007, 2008 Jerome Alet <alet@librelogiciel.com> |
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[463] | 6 | # This program is free software: you can redistribute it and/or modify |
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[252] | 7 | # it under the terms of the GNU General Public License as published by |
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[463] | 8 | # the Free Software Foundation, either version 3 of the License, or |
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[252] | 9 | # (at your option) any later version. |
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[463] | 10 | # |
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[252] | 11 | # This program is distributed in the hope that it will be useful, |
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| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | # GNU General Public License for more details. |
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| 15 | # |
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| 16 | # You should have received a copy of the GNU General Public License |
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[463] | 17 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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[252] | 18 | # |
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| 19 | # $Id$ |
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| 20 | # |
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| 21 | |
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[472] | 22 | """This modules implements a really minimalist PJL/EJL parser.""" |
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[357] | 23 | |
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[454] | 24 | # NOTES : QTY= is the number of collated copies for a job. |
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| 25 | # NOTES : COPIES= is the number of uncollated copies for each page of a job |
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| 26 | |
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[252] | 27 | import sys |
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| 28 | |
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| 29 | class PJLParserError(Exception): |
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| 30 | """An exception for PJLParser related stuff.""" |
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| 31 | def __init__(self, message = ""): |
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| 32 | self.message = message |
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| 33 | Exception.__init__(self, message) |
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| 34 | def __repr__(self): |
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| 35 | return self.message |
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| 36 | __str__ = __repr__ |
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| 37 | |
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| 38 | class PJLParser : |
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| 39 | """A parser for PJL documents. |
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| 40 | |
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[455] | 41 | Information extracted for bpl11897.pdf which was |
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[454] | 42 | downloaded from Hewlett-Packard's website. |
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[252] | 43 | """ |
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[472] | 44 | JL = "PJL" |
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[252] | 45 | def __init__(self, pjljob, debug=0) : |
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[472] | 46 | """Initializes JL Parser.""" |
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[252] | 47 | self.debug = debug |
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[472] | 48 | self.jlmarker = "@%s" % self.JL |
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[252] | 49 | self.statements = pjljob.replace("\r\n", "\n").split("\n") |
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| 50 | self.default_variables = {} |
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| 51 | self.environment_variables = {} |
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| 52 | self.parsed = 0 |
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| 53 | self.parse() |
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| 54 | |
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| 55 | def __str__(self) : |
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| 56 | """Outputs our variables as a string of text.""" |
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| 57 | if not self.parsed : |
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| 58 | return "" |
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| 59 | mybuffer = [] |
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| 60 | if self.default_variables : |
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| 61 | mybuffer.append("Default variables :") |
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| 62 | for (k, v) in self.default_variables.items() : |
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| 63 | mybuffer.append(" %s : %s" % (k, v)) |
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| 64 | if self.environment_variables : |
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| 65 | mybuffer.append("Environment variables :") |
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| 66 | for (k, v) in self.environment_variables.items() : |
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| 67 | mybuffer.append(" %s : %s" % (k, v)) |
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| 68 | return "\n".join(mybuffer) |
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| 69 | |
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| 70 | def logdebug(self, message) : |
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| 71 | """Logs a debug message if needed.""" |
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| 72 | if self.debug : |
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| 73 | sys.stderr.write("%s\n" % message) |
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| 74 | |
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| 75 | def cleanvars(self) : |
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| 76 | """Cleans the variables dictionnaries.""" |
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| 77 | for dicname in ("default", "environment") : |
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| 78 | varsdic = getattr(self, "%s_variables" % dicname) |
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| 79 | for (k, v) in varsdic.items() : |
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| 80 | if len(v) == 1 : |
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| 81 | varsdic[k] = v[0] |
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| 82 | |
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| 83 | def parse(self) : |
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[472] | 84 | """Parses a JL job.""" |
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[252] | 85 | for i in range(len(self.statements)) : |
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| 86 | statement = self.statements[i] |
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[472] | 87 | if statement.startswith(self.jlmarker) : |
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[252] | 88 | parts = statement.split() |
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| 89 | nbparts = len(parts) |
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[472] | 90 | if parts[0] == self.jlmarker : |
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| 91 | # this is a valid JL statement, but we don't |
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[252] | 92 | # want to examine all of them... |
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[472] | 93 | if (nbparts > 2) \ |
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| 94 | and ((parts[1].upper() in ("SET", "DEFAULT")) \ |
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| 95 | or ((self.jlmarker == "@EJL") and (parts[1].upper() == "JI"))) : |
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[252] | 96 | # this is what we are interested in ! |
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| 97 | try : |
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[472] | 98 | (varname, value) = "".join(parts[2:]).split("=", 1) # TODO : parse multiple assignments on the same SET/JI statement |
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[252] | 99 | except : |
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[472] | 100 | self.logdebug("Invalid JL SET statement [%s]" % repr(statement)) |
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[252] | 101 | else : |
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| 102 | # all still looks fine... |
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| 103 | if parts[1].upper() == "DEFAULT" : |
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| 104 | varsdic = self.default_variables |
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| 105 | else : |
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| 106 | varsdic = self.environment_variables |
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| 107 | variable = varsdic.setdefault(varname.upper(), []) |
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| 108 | variable.append(value) |
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| 109 | else : |
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[472] | 110 | self.logdebug("Ignored JL statement [%s]" % repr(statement)) |
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| 111 | self.logdebug(parts) |
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[252] | 112 | else : |
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[472] | 113 | self.logdebug("Invalid JL statement [%s]" % repr(statement)) |
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[563] | 114 | elif (not statement) \ |
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| 115 | or (statement == r"%-12345X@PJL EOJ") \ |
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| 116 | or statement[2:].startswith("HP-PCL XL;") : |
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| 117 | self.logdebug("Ignored JL statement [%s]" % repr(statement)) |
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[252] | 118 | else : |
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[472] | 119 | self.logdebug("Invalid JL statement [%s]" % repr(statement)) |
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[252] | 120 | self.cleanvars() |
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| 121 | self.parsed = 1 |
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[563] | 122 | # self.logdebug("%s\n" % str(self)) |
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[252] | 123 | |
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[472] | 124 | class EJLParser(PJLParser) : |
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| 125 | """A parser for EJL (Epson Job Language) documents.""" |
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| 126 | JL = "EJL" |
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| 127 | |
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[252] | 128 | def test() : |
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| 129 | """Test function.""" |
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| 130 | if (len(sys.argv) < 2) or ((not sys.stdin.isatty()) and ("-" not in sys.argv[1:])) : |
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| 131 | sys.argv.append("-") |
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| 132 | for arg in sys.argv[1:] : |
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[472] | 133 | klass = PJLParser |
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[252] | 134 | if arg == "-" : |
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| 135 | infile = sys.stdin |
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| 136 | mustclose = 0 |
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| 137 | else : |
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[472] | 138 | if arg.endswith(".ejl") : |
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| 139 | klass = EJLParser |
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[252] | 140 | infile = open(arg, "rb") |
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| 141 | mustclose = 1 |
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| 142 | try : |
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[472] | 143 | parser = klass(infile.read(), debug=1) |
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[252] | 144 | except PJLParserError, msg : |
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| 145 | sys.stderr.write("ERROR: %s\n" % msg) |
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| 146 | sys.stderr.flush() |
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| 147 | if mustclose : |
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| 148 | infile.close() |
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| 149 | print str(parser) |
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| 150 | |
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| 151 | if __name__ == "__main__" : |
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| 152 | test() |
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