1 | #!/usr/bin/env bash
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2 | #
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3 | # Usage:
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4 | # ./pickle.sh <function name>
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5 |
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6 | set -o nounset
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7 | set -o pipefail
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8 | set -o errexit
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9 |
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10 | #
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11 | # Protocol TWO
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12 | #
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13 |
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14 | # Opcodes for pure data. BIN is for"binary"
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15 |
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16 | # PROTO 2 # Say what protocol we're using
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17 |
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18 | # EMPTY_DICT
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19 | # EMPTY_LIST
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20 | # NEWTRUE
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21 | # BIN FLOAT
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22 | # BIN INT1
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23 | # BIN UNICODE -- don't like this, but OK
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24 |
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25 | # SET ITEMS # Dict
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26 | # APPENDS # List
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27 |
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28 | # MARK
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29 | # BIN PUT index
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30 | # BIN GET index
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31 |
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32 | # STOP
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33 |
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34 |
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35 | # Other:
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36 |
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37 | # GLOBAL -- push self.find_class(mod_name, class_name)
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38 | # NEWOBJ # build object by applying cls.__new__ to argtuple
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39 | # # OK this still relies on __new__ fundamentally, not sure I want
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40 | # it.
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41 | # BINPUT # store stack top in memo; index is string arg
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42 | # BINGET # push item from memo on stack; index is string arg
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43 | # BININT2 -- 10043
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44 | # SETITEM -- calls __dict__.update() or __setstate__()
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45 | # BUILD
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46 |
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47 |
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48 | # NOTE: There is no INST bytecode.
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49 | run() {
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50 | local kind=$1
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51 |
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52 | local p=_tmp/$kind.pickle
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53 |
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54 | for version in 0 1 2 3 4; do
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55 | demo/cpython/pickle_instance.py $kind $version $p
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56 |
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57 | python3 -m pickletools $p
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58 |
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59 | # Protocol 0 is viewable as plain text, but protocol 2 isn't
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60 | echo
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61 | echo "--- $p with PICKLE version $version ---"
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62 | echo
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63 |
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64 | od -c $p
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65 | ls -l $p
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66 |
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67 | echo
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68 | echo ---
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69 | echo
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70 |
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71 | done
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72 | }
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73 |
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74 | instance() {
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75 | run instance
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76 | }
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77 |
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78 | pure-data() {
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79 | run pure-data
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80 | }
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81 |
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82 | #
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83 | # Protocol ZERO
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84 | #
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85 |
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86 | # The pickle VM has a stack and a memo dictionary.
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87 | #
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88 | # Oh and it also uses copy_reg and _reconstructor
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89 | # OK so what I'm missing is __new__! I didn't know about that.
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90 | # It creates an object without initializing fields. OK.
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91 | # Not sure I want that in OVM2.
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92 |
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93 | # def _reconstructor(cls, base, state):
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94 | # if base is object:
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95 | # obj = object.__new__(cls)
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96 | # else:
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97 | # obj = base.__new__(cls, state)
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98 | # if base.__init__ != object.__init__:
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99 | # base.__init__(obj, state)
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100 | # return obj
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101 |
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102 |
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103 | # opcodes used:
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104 | # GLOBAL
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105 | # PUT # store stack top in memo
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106 | # MARK # set a mark
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107 | # REDUCE # apply a callable
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108 | # SETITEM # add key-value pair to dict
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109 | # BUILD # call __dict__.update() (or __setstate__)
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110 |
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111 | # TUPLE
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112 | # DICT
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113 | # INT
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114 | # NONE
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115 | # STRING
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116 |
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117 |
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118 | "$@"
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