[3] | 1 | #!/usr/bin/env python
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| 2 |
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[6] | 3 | import sys
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[3] | 4 | import cmd
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| 5 | import struct
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| 6 | import socket
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| 7 | import os
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| 8 |
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| 9 | #------------------------------------------------------------------------------
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| 10 |
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| 11 | class CLI(cmd.Cmd):
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| 12 | """Simple command-line interface for the X-Plane Remote Access plugin."""
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| 13 | _types = { "i" : 0x01,
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| 14 | "f" : 0x02,
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| 15 | "d" : 0x03,
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| 16 | "fa" : 0x11,
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| 17 | "ia" : 0x12,
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[7] | 18 | "ba" : 0x13,
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| 19 | "s" : 0x13 }
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| 20 |
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| 21 | @staticmethod
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| 22 | def _splitArgs(args):
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| 23 | """Split the given argument string into a list of words."""
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| 24 | words = []
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| 25 | word = ""
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| 26 | inQuote = False
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| 27 | for c in args:
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| 28 | if c.isspace() and not inQuote:
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| 29 | if word:
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| 30 | words.append(word)
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| 31 | word = ""
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| 32 | elif c=="\"" and (not word or inQuote):
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| 33 | inQuote = not inQuote
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| 34 | else:
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| 35 | word += c
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| 36 | if word:
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| 37 | words.append(word)
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| 38 | return words
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[3] | 39 |
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| 40 | @staticmethod
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[8] | 41 | def _parseGetSpec(words):
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| 42 | """Parse a data query specification from the given argument word lisst.
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| 43 |
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| 44 | If there is some failure, it returns None.
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| 45 |
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| 46 | Otherwise it returns a tuple of two items:
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| 47 | - the parsed data, which is a tuple of these items:
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| 48 | - the name of the dataref to query
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| 49 | - the type of the dataref to query (it is a valid type, checked by
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| 50 | the function)
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| 51 | - the length of the dataref to query
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| 52 | - the offset to query the dataref from
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| 53 |
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| 54 | - the remainder of the argument list."""
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| 55 | if len(words)<2:
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| 56 | print >> sys.stderr, "Missing parameters"
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| 57 | return None
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| 58 |
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| 59 | nextIndex = 2
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| 60 |
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| 61 | name = words[0]
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| 62 | type = words[1]
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| 63 | if type not in CLI._types:
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| 64 | print >> sys.stderr, "Invalid type"
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| 65 | return None
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| 66 |
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| 67 | length = None
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| 68 | offset = None
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| 69 | if type in ["ia", "fa", "ba", "s"]:
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| 70 | if len(words)<4:
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| 71 | print >> sys.stderr, "Missing parameters"
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| 72 | return None
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| 73 | length = int(words[2])
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| 74 | offset = int(words[3])
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| 75 | nextIndex = 4
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| 76 |
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| 77 | return ((name, type, length, offset), words[nextIndex:])
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| 78 |
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| 79 | @staticmethod
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[3] | 80 | def _packLength(x):
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| 81 | """Pack the given integer as a variable-length value."""
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| 82 | s = ""
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| 83 | while True:
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| 84 | y = x&0x7f
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| 85 | x >>= 7
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| 86 | if x>0: y |= 0x80
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| 87 | s += struct.pack("B", y)
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| 88 | if x==0:
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| 89 | return s
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| 90 |
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| 91 | @staticmethod
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| 92 | def _packString(s):
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| 93 | """Pack the given string."""
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| 94 | return CLI._packLength(len(s)) + s
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| 95 |
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| 96 | def __init__(self, stream):
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| 97 | """Construct the CLI."""
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| 98 | cmd.Cmd.__init__(self)
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| 99 |
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| 100 | self._stream = stream
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[8] | 101 | self._multiGets = {}
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[9] | 102 | self._multiSets = {}
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[3] | 103 |
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| 104 | self.use_rawinput = True
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| 105 | self.intro = "\nX-Plane Remote Access plugin command prompt\n"
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[6] | 106 | self.prompt = "XPLRA> "
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[3] | 107 |
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| 108 | self.daemon = True
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| 109 |
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| 110 | def default(self, line):
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| 111 | """Handle uhandled commands"""
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| 112 | if line=="EOF":
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| 113 | print
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[6] | 114 | return True
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[3] | 115 | else:
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| 116 | return super(CLI, self).default(line)
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| 117 |
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| 118 | def do_get(self, args):
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| 119 | """Handle the 'get' command"""
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[7] | 120 | words = self._splitArgs(args)
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[8] | 121 | result = self._parseGetSpec(words)
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| 122 | if result is None:
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[3] | 123 | return False
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| 124 |
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[8] | 125 | (name, type, length, offset) = result[0]
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[3] | 126 |
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| 127 | self._writeU8(0x01)
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| 128 | self._writeString(name)
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| 129 | self._writeU8(self._types[type])
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| 130 | if length is not None:
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| 131 | self._writeS32(length)
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[6] | 132 | self._writeS32(offset)
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[3] | 133 | self._flush()
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| 134 |
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| 135 | result = self._readU8()
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| 136 | if result==0:
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[7] | 137 | print self._readValue(type)
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| 138 | else:
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[8] | 139 | print >> sys.stderr, "Error code:", result
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[7] | 140 |
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| 141 | def do_set(self, args):
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| 142 | """Handle the 'set' command"""
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| 143 | words = self._splitArgs(args)
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| 144 | if len(words)<3:
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| 145 | print >> sys.stderr, "Missing parameters"
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| 146 | return False
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| 147 |
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| 148 | name = words[0]
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| 149 |
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| 150 | type = words[1]
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| 151 | if type not in self._types:
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| 152 | print >> sys.stderr, "Invalid type"
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| 153 | return False
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| 154 |
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| 155 | value = words[2]
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[3] | 156 |
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[7] | 157 | length = None
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| 158 | offset = None
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| 159 | if len(words)>4:
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| 160 | length = int(words[3])
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| 161 | offset = int(words[4])
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| 162 |
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| 163 | self._writeU8(0x02)
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| 164 | self._writeString(name)
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| 165 | self._writeU8(self._types[type])
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| 166 | if length is not None:
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| 167 | self._writeS32(length)
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| 168 | self._writeS32(offset)
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| 169 | self._writeValue(type, value, length)
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| 170 |
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| 171 | self._flush()
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| 172 |
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| 173 | result = self._readU8()
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| 174 | if result!=0:
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[8] | 175 | print >> sys.stderr, "Error code:", result
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| 176 |
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[10] | 177 | def do_multiget(self, args):
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| 178 | """Handle the 'multiget' command"""
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| 179 | words = self._splitArgs(args)
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| 180 | specs = []
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| 181 | while words:
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| 182 | result = self._parseGetSpec(words)
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| 183 | if result is None:
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| 184 | return False
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| 185 | else:
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| 186 | specs.append(result[0])
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| 187 | words = result[1]
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| 188 |
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| 189 | if not specs:
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| 190 | return False
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| 191 |
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| 192 | self._writeU8(0x03)
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| 193 | self._writeU32(len(specs))
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| 194 | for (name, type, length, offset) in specs:
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| 195 | self._writeString(name)
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| 196 | self._writeU8(self._types[type])
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| 197 | if length is not None:
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| 198 | self._writeS32(length)
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| 199 | self._writeS32(offset)
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| 200 | self._flush()
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| 201 |
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| 202 | result = self._readU8()
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| 203 | if result==0:
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| 204 | for (_, type, _, _) in specs:
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| 205 | value = self._readValue(type)
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| 206 | print value
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| 207 | elif result==0x02:
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| 208 | index = self._readU32()
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| 209 | print >> sys.stderr, "Invalid dataref at #%d" % (index,)
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| 210 | else:
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| 211 | print >> sys.stderr, "Error code:", result
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| 212 |
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| 213 | def do_multiset(self, args):
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| 214 | """Handle the 'multiset' command"""
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| 215 | words = self._splitArgs(args)
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| 216 | specs = []
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| 217 | values = []
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| 218 | while words:
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| 219 | result = self._parseGetSpec(words)
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| 220 | if result is None:
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| 221 | return False
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| 222 | else:
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| 223 | words = result[1]
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| 224 | if not words:
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| 225 | print >> sys.stderr, "Missing argument"
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| 226 | return False
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| 227 | specs.append(result[0])
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| 228 | values.append(words[0])
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| 229 | words = words[1:]
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| 230 |
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| 231 | if not specs:
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| 232 | return False
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| 233 |
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| 234 | self._writeU8(0x04)
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| 235 | self._writeU32(len(specs))
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| 236 | for ((name, type, length, offset), value) in zip(specs, values):
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| 237 | self._writeString(name)
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| 238 | self._writeU8(self._types[type])
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| 239 | if length is not None:
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| 240 | self._writeS32(length)
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| 241 | self._writeS32(offset)
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| 242 | self._writeValue(type, value, length)
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| 243 | self._flush()
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| 244 |
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| 245 | result = self._readU8()
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| 246 | if result==0x02:
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| 247 | index = self._readU32()
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| 248 | print >> sys.stderr, "Invalid dataref at #%d" % (index,)
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| 249 | elif result!=0:
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| 250 | print >> sys.stderr, "Error code:", result
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| 251 |
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[8] | 252 | def do_reg_multiget(self, args):
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| 253 | """Handle the 'reg_multiget' command"""
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| 254 | words = self._splitArgs(args)
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| 255 | specs = []
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| 256 | while words:
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| 257 | result = self._parseGetSpec(words)
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| 258 | if result is None:
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| 259 | return False
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| 260 | else:
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| 261 | specs.append(result[0])
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| 262 | words = result[1]
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| 263 |
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| 264 | if not specs:
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| 265 | return False
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| 266 |
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| 267 | self._writeU8(0x11)
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| 268 | self._writeU32(len(specs))
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| 269 | for (name, type, length, offset) in specs:
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| 270 | self._writeString(name)
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| 271 | self._writeU8(self._types[type])
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| 272 | if length is not None:
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| 273 | self._writeS32(length)
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| 274 | self._writeS32(offset)
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| 275 | self._flush()
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| 276 |
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| 277 | result = self._readU8()
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| 278 | if result==0:
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| 279 | id = self._readU32()
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| 280 | self._multiGets[id] = \
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| 281 | [type for (name, type, length, offset) in specs]
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| 282 | print "ID:", id
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| 283 | else:
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| 284 | print >> sys.stderr, "Error code:", result
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| 285 |
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| 286 | def do_unreg_multiget(self, args):
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| 287 | """Handle the 'unreg_multiget' command"""
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| 288 | words = self._splitArgs(args)
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| 289 | if len(words)<1:
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| 290 | print >> sys.stderr, "Missing parameter"
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| 291 | return False
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| 292 |
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| 293 | id = int(words[0])
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| 294 |
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| 295 | self._writeU8(0x12)
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| 296 | self._writeU32(id)
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| 297 | self._flush()
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| 298 |
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| 299 | result = self._readU8()
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| 300 | if result!=0:
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| 301 | print >> sys.stderr, "Error code:", result
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| 302 |
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| 303 | if id in self._multiGets:
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| 304 | del self._multiGets[id]
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| 305 |
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| 306 | def do_exec_multiget(self, args):
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[9] | 307 | """Handle the 'exec_multiget' command"""
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[8] | 308 | words = self._splitArgs(args)
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| 309 | if len(words)<1:
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| 310 | print >> sys.stderr, "Missing parameter"
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| 311 | return False
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| 312 |
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| 313 | id = int(words[0])
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| 314 | if id not in self._multiGets:
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| 315 | print >> sys.stderr, "Invalid ID"
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| 316 | return False
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| 317 |
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| 318 | self._writeU8(0x13)
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| 319 | self._writeU32(id)
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| 320 | self._flush()
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| 321 |
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| 322 | result = self._readU8()
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| 323 | if result==0:
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| 324 | for type in self._multiGets[id]:
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| 325 | value = self._readValue(type)
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| 326 | print value
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| 327 | elif result==0x02:
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| 328 | index = self._readU32()
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| 329 | print >> sys.stderr, "Invalid dataref at #%d" % (index,)
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| 330 | else:
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| 331 | print >> sys.stderr, "Error code:", result
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[3] | 332 |
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[9] | 333 | def do_reg_multiset(self, args):
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| 334 | """Handle the 'reg_multiset' command"""
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| 335 | words = self._splitArgs(args)
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| 336 | specs = []
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| 337 | while words:
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| 338 | result = self._parseGetSpec(words)
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| 339 | if result is None:
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| 340 | return False
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| 341 | else:
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| 342 | specs.append(result[0])
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| 343 | words = result[1]
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| 344 |
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| 345 | if not specs:
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| 346 | return False
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| 347 |
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| 348 | self._writeU8(0x21)
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| 349 | self._writeU32(len(specs))
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| 350 | for (name, type, length, offset) in specs:
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| 351 | self._writeString(name)
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| 352 | self._writeU8(self._types[type])
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| 353 | if length is not None:
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| 354 | self._writeS32(length)
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| 355 | self._writeS32(offset)
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| 356 | self._flush()
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| 357 |
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| 358 | result = self._readU8()
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| 359 | if result==0:
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| 360 | id = self._readU32()
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| 361 | self._multiSets[id] = \
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| 362 | [(type, length) for (name, type, length, offset) in specs]
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| 363 | print "ID:", id
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| 364 | else:
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| 365 | print >> sys.stderr, "Error code:", result
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| 366 |
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| 367 | def do_unreg_multiset(self, args):
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| 368 | """Handle the 'unreg_multiset' command"""
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| 369 | words = self._splitArgs(args)
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| 370 | if len(words)<1:
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| 371 | print >> sys.stderr, "Missing parameter"
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| 372 | return False
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| 373 |
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| 374 | id = int(words[0])
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| 375 |
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| 376 | self._writeU8(0x22)
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| 377 | self._writeU32(id)
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| 378 | self._flush()
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| 379 |
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| 380 | result = self._readU8()
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| 381 | if result!=0:
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| 382 | print >> sys.stderr, "Error code:", result
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| 383 |
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| 384 | if id in self._multiSets:
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| 385 | del self._multiSets[id]
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| 386 |
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| 387 | def do_exec_multiset(self, args):
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| 388 | """Handle the 'exec_multiget' command"""
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| 389 | words = self._splitArgs(args)
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| 390 | if len(words)<1:
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| 391 | print >> sys.stderr, "Missing parameter"
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| 392 | return False
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| 393 |
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| 394 | id = int(words[0])
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| 395 | if id not in self._multiSets:
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| 396 | print >> sys.stderr, "Invalid ID"
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| 397 | return False
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| 398 |
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| 399 | words = words[1:]
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| 400 | types = self._multiSets[id]
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| 401 | if len(words)<len(types):
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| 402 | print >> sys.stderr, "Missing parameter"
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| 403 | return False
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| 404 |
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| 405 |
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| 406 | self._writeU8(0x23)
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| 407 | self._writeU32(id)
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| 408 | for ((type, length), word) in zip(types, words):
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| 409 | self._writeValue(type, word, length)
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| 410 | self._flush()
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| 411 |
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| 412 | result = self._readU8()
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| 413 | if result==0x02:
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| 414 | index = self._readU32()
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| 415 | print >> sys.stderr, "Invalid dataref at #%d" % (index,)
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| 416 | elif result!=0:
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| 417 | print >> sys.stderr, "Error code:", result
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| 418 |
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[3] | 419 | def _writeU8(self, x):
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| 420 | """Write the given value as an unsigned, 8-bit value."""
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| 421 | self._stream.write(struct.pack("B", x))
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| 422 |
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| 423 | def _writeS32(self, x):
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| 424 | """Write the given value as a signed, 32-bit value."""
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| 425 | self._stream.write(struct.pack("i", x))
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| 426 |
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[8] | 427 | def _writeU32(self, x):
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| 428 | """Write the given value as an unsigned, 32-bit value."""
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| 429 | self._stream.write(struct.pack("I", x))
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| 430 |
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[7] | 431 | def _writeFloat(self, x):
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| 432 | """Write the given value as a single-precision floating point."""
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| 433 | self._stream.write(struct.pack("f", x))
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| 434 |
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| 435 | def _writeDouble(self, x):
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| 436 | """Write the given value as a double-precision floating point."""
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| 437 | self._stream.write(struct.pack("d", x))
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| 438 |
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[3] | 439 | def _writeLength(self, length):
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| 440 | """Write the given value is a variable-length value into our stream."""
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| 441 | self._stream.write(self._packLength(length))
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| 442 |
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| 443 | def _writeString(self, str):
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| 444 | """Write the given string into the stream."""
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| 445 | self._stream.write(self._packString(str))
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| 446 |
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| 447 | def _flush(self):
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| 448 | """Flush our stream."""
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| 449 | self._stream.flush()
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| 450 |
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| 451 | def _readU8(self):
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| 452 | """Read an unsigned, 8-bit value from the stream."""
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| 453 | (value,) = struct.unpack("B", self._stream.read(1))
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| 454 | return value
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| 455 |
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| 456 | def _readS32(self):
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| 457 | """Read a signed, 32-bit value from the stream."""
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| 458 | (value,) = struct.unpack("i", self._stream.read(4))
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| 459 | return value
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| 460 |
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[8] | 461 | def _readU32(self):
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| 462 | """Read an unsigned, 32-bit value from the stream."""
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| 463 | (value,) = struct.unpack("I", self._stream.read(4))
|
---|
| 464 | return value
|
---|
| 465 |
|
---|
[3] | 466 | def _readFloat(self):
|
---|
| 467 | """Read a single-precision floating point value from the stream."""
|
---|
| 468 | (value,) = struct.unpack("f", self._stream.read(4))
|
---|
| 469 | return value
|
---|
| 470 |
|
---|
| 471 | def _readDouble(self):
|
---|
| 472 | """Read a double-precision floating point value from the stream."""
|
---|
| 473 | (value,) = struct.unpack("d", self._stream.read(8))
|
---|
| 474 | return value
|
---|
| 475 |
|
---|
| 476 | def _readLength(self):
|
---|
| 477 | """Read a variable-length value from our stream."""
|
---|
| 478 | length = 0
|
---|
| 479 | while True:
|
---|
| 480 | (x,) = struct.unpack("B", self._stream.read(1))
|
---|
| 481 | length <<= 7
|
---|
| 482 | length |= x&0x7f
|
---|
| 483 | if x&0x80==0:
|
---|
| 484 | return length
|
---|
| 485 |
|
---|
| 486 | def _readString(self):
|
---|
| 487 | """Read a string from our stream."""
|
---|
| 488 | length = self._readLength()
|
---|
| 489 | return self._stream.read(length)
|
---|
| 490 |
|
---|
[7] | 491 | def _readValue(self, type):
|
---|
| 492 | """Read the value of the given type from the stream."""
|
---|
| 493 | if type=="i":
|
---|
| 494 | return self._readS32()
|
---|
| 495 | elif type=="f":
|
---|
| 496 | return self._readFloat()
|
---|
| 497 | elif type=="d":
|
---|
| 498 | return self._readDouble()
|
---|
| 499 | elif type in ["fa", "ia", "ba", "s"]:
|
---|
| 500 | length = self._readS32()
|
---|
| 501 | if length>8192:
|
---|
| 502 | print "Very big length:", length
|
---|
| 503 | return None
|
---|
| 504 | elif length>0:
|
---|
| 505 | if type=="fa":
|
---|
| 506 | return [self._readFloat() for i in range(0, length)]
|
---|
| 507 | elif type=="ia":
|
---|
| 508 | return [self._readS32() for i in range(0, length)]
|
---|
| 509 | elif type=="ba" or type=="s":
|
---|
| 510 | bytes = [self._readU8() for i in range(0, length)]
|
---|
| 511 | if type=="ba":
|
---|
| 512 | return bytes
|
---|
| 513 | else:
|
---|
| 514 | string = ""
|
---|
| 515 | for b in bytes:
|
---|
| 516 | if b==0: break
|
---|
| 517 | string += chr(b)
|
---|
| 518 | return string
|
---|
| 519 | elif length==0:
|
---|
| 520 | return []
|
---|
| 521 | else:
|
---|
| 522 | return None
|
---|
| 523 |
|
---|
| 524 | def _writeValue(self, type, value, length = None):
|
---|
| 525 | """Write the given value of the given type to the stream."""
|
---|
| 526 | if type=="i":
|
---|
| 527 | self._writeS32(int(value))
|
---|
| 528 | elif type=="f":
|
---|
| 529 | self._writeFloat(float(value))
|
---|
| 530 | elif type=="d":
|
---|
| 531 | self._writeDouble(float(value))
|
---|
| 532 | elif type in ["fa", "ia", "ba", "s"]:
|
---|
| 533 | if type=="s":
|
---|
| 534 | values = [ord(c) for c in value]
|
---|
| 535 | else:
|
---|
| 536 | words = [word.strip() for word in value.split(",")]
|
---|
| 537 | values = [float(word) if type=="fa" else int(word)
|
---|
| 538 | for word in words]
|
---|
| 539 | if len(values)<length:
|
---|
| 540 | values += [0.0 if type=="fa" else 0] * (length-len(values))
|
---|
| 541 | elif len(values)>length:
|
---|
| 542 | values = values[:length]
|
---|
| 543 | for value in values:
|
---|
| 544 | if type=="fa":
|
---|
| 545 | self._writeFloat(value)
|
---|
| 546 | elif type=="ia":
|
---|
| 547 | self._writeS32(value)
|
---|
| 548 | else:
|
---|
| 549 | self._writeU8(value)
|
---|
| 550 |
|
---|
[3] | 551 | #------------------------------------------------------------------------------
|
---|
| 552 |
|
---|
| 553 | if __name__ == "__main__":
|
---|
| 554 | s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
|
---|
| 555 | s.connect("/tmp/xplra-" + os.environ["LOGNAME"])
|
---|
| 556 | CLI(s.makefile()).cmdloop()
|
---|