micropython

Annotated rsvplib.py

450:5382a26943ca
443:583b1de09eec
431:dced8cb98f4a
2011-07-05 Paul Boddie file changeset files shortlog Simplified ObjectSet merging which seemed to be attempting to combine individual values.
paul@261 1 
#!/usr/bin/env python
paul@261 2 
 
 paul@261      3 
"""
 
 paul@261      4 
A native function library for a really simple virtual processor.
 
 paul@261      5 
 
 paul@401      6 
Copyright (C) 2007, 2008, 2009, 2010, 2011 Paul Boddie <paul@boddie.org.uk>
 
 paul@261      7 
 
 paul@261      8 
This program is free software; you can redistribute it and/or modify it under
 
 paul@261      9 
the terms of the GNU General Public License as published by the Free Software
 
 paul@261     10 
Foundation; either version 3 of the License, or (at your option) any later
 
 paul@261     11 
version.
 
 paul@261     12 
 
 paul@261     13 
This program is distributed in the hope that it will be useful, but WITHOUT
 
 paul@261     14 
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 
 paul@261     15 
FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 
 paul@261     16 
details.
 
 paul@261     17 
 
 paul@261     18 
You should have received a copy of the GNU General Public License along with
 
 paul@261     19 
this program.  If not, see <http://www.gnu.org/licenses/>.
 
 paul@261     20 
"""
 
 paul@261     21 
 
 paul@264     22 
from micropython.program import DataValue
 
 paul@261     23 
import operator
 
 paul@261     24 
 
 paul@261     25 
class Library:
 
 paul@261     26 
 
 paul@261     27 
    "Native function implementations."
 
 paul@261     28 
 
 paul@395     29 
    # NOTE: These attributes need changing if the instance layout changes.
 
 paul@395     30 
 
 paul@401     31 
    instance_template_size = instance_data_offset = 1
 
 paul@401     32 
    instance_size = instance_template_size + 1
 
 paul@408     33 
    fragment_data_offset = 1
 
 paul@395     34 
 
 paul@354     35 
    def __init__(self, machine, constants):
 
 paul@261     36 
 
 paul@261     37 
        """
 
 paul@354     38 
        Initialise the library with the 'machine' and the 'constants' addresses
 
 paul@354     39 
        dictionary.
 
 paul@261     40 
        """
 
 paul@261     41 
 
 paul@261     42 
        self.machine = machine
 
 paul@354     43 
        self.constants = constants
 
 paul@261     44 
 
 paul@261     45 
        # Native class constants.
 
 paul@261     46 
 
 paul@412     47 
        self.int_class, self.int_instance = self._get_builtin_class_and_template("int")
 
 paul@412     48 
        self.list_class, self.list_instance = self._get_builtin_class_and_template("list")
 
 paul@412     49 
        self.index_error, self.index_error_instance = self._get_builtin_class_and_template("IndexError")
 
 paul@412     50 
        self.str_class, self.str_instance = self._get_builtin_class_and_template("basestring")
 
 paul@412     51 
        self.accessor_class, self.accessor_instance = self._get_builtin_class_and_template("_accessor")
 
 paul@261     52 
 
 paul@261     53 
        self.tuple_class = self.machine.tuple_class
 
 paul@408     54 
        self.tuple_instance = self.machine.tuple_instance
 
 paul@412     55 
 
 paul@412     56 
        self.attr_error_instance = self.machine.attr_error_instance
 
 paul@261     57 
        self.type_error_instance = self.machine.type_error_instance
 
 paul@261     58 
 
 paul@261     59 
        self.frame_stack = self.machine.frame_stack
 
 paul@261     60 
        self.local_sp_stack = self.machine.local_sp_stack
 
 paul@261     61 
 
 paul@412     62 
    def _get_builtin_class_and_template(self, name):
 
 paul@412     63 
        cls = self.machine._get_class("__builtins__", name)
 
 paul@412     64 
        if cls is not None:
 
 paul@412     65 
            return cls.location, cls.instance_template_location
 
 paul@412     66 
        else:
 
 paul@412     67 
            return None, None
 
 paul@412     68 
 
 paul@391     69 
    def _check_index(self, pos, nelements):
 
 paul@391     70 
        return pos >= 0 and pos < nelements
 
 paul@390     71 
 
 paul@431     72 
    # Native functionality.
 
 paul@261     73 
 
 paul@431     74 
    def builtins_no_op(self):
 
 paul@431     75 
        pass
 
 paul@261     76 
 
 paul@431     77 
    def native_int_arithmetic_op(self, op):
 
 paul@431     78 
        self.machine.LoadName(0) # left value
 
 paul@431     79 
        left_data = self.machine.value + self.instance_data_offset
 
 paul@431     80 
        self.machine.LoadName(1) # right value
 
 paul@431     81 
        right_data = self.machine.value + self.instance_data_offset
 
 paul@261     82 
 
 paul@261     83 
        # Make a new object.
 
 paul@261     84 
 
 paul@395     85 
        addr = self.machine._MakeObject(self.instance_size, self.int_instance)
 
 paul@261     86 
 
 paul@261     87 
        # Store the result.
 
 paul@261     88 
        # NOTE: The data is considered ready to use.
 
 paul@261     89 
 
 paul@395     90 
        self.machine.save(addr + self.instance_data_offset, op(self.machine.load(left_data), self.machine.load(right_data)))
 
 paul@261     91 
 
 paul@261     92 
        # Return the new object.
 
 paul@261     93 
        # Introduce object as context for the new object.
 
 paul@261     94 
 
 paul@429     95 
        self.machine.result_context = addr
 
 paul@429     96 
        self.machine.result_value = addr
 
 paul@261     97 
 
 paul@431     98 
    def native_logical_op(self, op):
 
 paul@431     99 
        self.machine.LoadName(0) # left value
 
 paul@431    100 
        left_data = self.machine.value + self.instance_data_offset
 
 paul@431    101 
        self.machine.LoadName(1) # right value
 
 paul@431    102 
        right_data = self.machine.value + self.instance_data_offset
 
 paul@262    103 
 
 paul@262    104 
        # Test the data.
 
 paul@262    105 
        # NOTE: The data is considered ready to use.
 
 paul@262    106 
 
 paul@262    107 
        if op(self.machine.load(left_data), self.machine.load(right_data)):
 
 paul@429    108 
            self.machine.result_context = self.constants[True]
 
 paul@429    109 
            self.machine.result_value = self.constants[True]
 
 paul@262    110 
        else:
 
 paul@429    111 
            self.machine.result_context = self.constants[False]
 
 paul@429    112 
            self.machine.result_value = self.constants[False]
 
 paul@262    113 
 
 paul@262    114 
    # Operators.
 
 paul@262    115 
    # Although this takes a short-cut by using the operator module, testing is
 
 paul@262    116 
    # still performed on the operands to ensure that they qualify for these
 
 paul@262    117 
    # native operations.
 
 paul@262    118 
 
 paul@431    119 
    def native_int_add(self):
 
 paul@431    120 
        return self.native_int_arithmetic_op(operator.add)
 
 paul@262    121 
 
 paul@431    122 
    def native_int_sub(self):
 
 paul@431    123 
        return self.native_int_arithmetic_op(operator.sub)
 
 paul@262    124 
 
 paul@431    125 
    def native_int_pow(self):
 
 paul@431    126 
        return self.native_int_arithmetic_op(operator.pow)
 
 paul@262    127 
 
 paul@431    128 
    def native_int_and(self):
 
 paul@431    129 
        return self.native_int_arithmetic_op(operator.and_)
 
 paul@262    130 
 
 paul@431    131 
    def native_int_or(self):
 
 paul@431    132 
        return self.native_int_arithmetic_op(operator.or_)
 
 paul@262    133 
 
 paul@431    134 
    def native_int_lt(self):
 
 paul@431    135 
        return self.native_logical_op(operator.lt)
 
 paul@262    136 
 
 paul@431    137 
    def native_int_gt(self):
 
 paul@431    138 
        return self.native_logical_op(operator.gt)
 
 paul@262    139 
 
 paul@431    140 
    def native_int_eq(self):
 
 paul@431    141 
        return self.native_logical_op(operator.eq)
 
 paul@262    142 
 
 paul@431    143 
    def native_str_lt(self):
 
 paul@431    144 
        return self.native_logical_op(operator.lt)
 
 paul@262    145 
 
 paul@431    146 
    def native_str_gt(self):
 
 paul@431    147 
        return self.native_logical_op(operator.gt)
 
 paul@262    148 
 
 paul@431    149 
    def native_str_eq(self):
 
 paul@431    150 
        return self.native_logical_op(operator.eq)
 
 paul@262    151 
 
 paul@262    152 
    # Specific operator methods.
 
 paul@262    153 
 
 paul@261    154 
    def builtins_int_neg(self):
 
 paul@431    155 
        self.machine.LoadName(0) # left value
 
 paul@431    156 
        left_data = self.machine.value + self.instance_data_offset
 
 paul@261    157 
 
 paul@261    158 
        # Make a new object.
 
 paul@261    159 
 
 paul@395    160 
        addr = self.machine._MakeObject(self.instance_size, self.int_instance)
 
 paul@261    161 
 
 paul@261    162 
        # Store the result.
 
 paul@261    163 
        # NOTE: The data is considered ready to use.
 
 paul@261    164 
 
 paul@395    165 
        self.machine.save(addr + self.instance_data_offset, -self.machine.load(left_data))
 
 paul@261    166 
 
 paul@261    167 
        # Return the new object.
 
 paul@261    168 
        # Introduce object as context for the new object.
 
 paul@261    169 
 
 paul@429    170 
        self.machine.result_context = addr
 
 paul@429    171 
        self.machine.result_value = addr
 
 paul@261    172 
 
 paul@262    173 
    # Various built-in methods.
 
 paul@261    174 
 
 paul@261    175 
    def builtins_list_new(self):
 
 paul@261    176 
        frame = self.local_sp_stack[-1]
 
 paul@261    177 
 
 paul@332    178 
        # The first parameter should be the instance.
 
 paul@261    179 
 
 paul@332    180 
        list_value = self.frame_stack[frame]
 
 paul@261    181 
 
 paul@332    182 
        # Make a new sequence.
 
 paul@332    183 
        # NOTE: Using an arbitrary size.
 
 paul@261    184 
 
 paul@408    185 
        new_fragment = self.machine._MakeFragment(self.fragment_data_offset, 5) # include the header
 
 paul@261    186 
 
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        # Complete the list instance by saving the fragment reference.
 
 paul@336    188 
        # NOTE: This requires an attribute in the list structure.
 
 paul@261    189 
 
 paul@395    190 
        addr = list_value.ref + self.instance_data_offset
 
 paul@332    191 
        self.machine.save(addr, DataValue(None, new_fragment))
 
 paul@261    192 
 
 paul@390    193 
    def builtins_list_get_single_item(self):
 
 paul@261    194 
        frame = self.local_sp_stack[-1]
 
 paul@261    195 
 
 paul@261    196 
        # Get the operand address.
 
 paul@261    197 
 
 paul@264    198 
        item_value = self.frame_stack[frame + 1]
 
 paul@261    199 
 
 paul@261    200 
        # Get the list address.
 
 paul@261    201 
 
 paul@264    202 
        obj_value = self.frame_stack[frame]
 
 paul@261    203 
 
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        # Get the fragment address.
 
 paul@261    205 
 
 paul@395    206 
        fragment = self.machine.load(obj_value.ref + self.instance_data_offset)
 
 paul@261    207 
 
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        # Get the fragment header.
 
 paul@261    209 
 
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        header = self.machine.load(fragment.ref)
 
 paul@408    211 
        nelements = header.occupied_size - self.fragment_data_offset
 
 paul@261    212 
 
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        # Get the item position.
 
 paul@261    214 
 
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        item_pos = self.machine.load(item_value.ref + self.instance_data_offset)
 
 paul@261    216 
 
 paul@391    217 
        if not self._check_index(item_pos, nelements):
 
 paul@395    218 
            self.machine.exception = self.machine._MakeObject(self.instance_size, self.index_error_instance)
 
 paul@261    219 
            return self.machine.RaiseException()
 
 paul@261    220 
 
 paul@395    221 
        # Get the item itself.
 
 paul@261    222 
 
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        data = self.machine.load(fragment.ref + self.fragment_data_offset + item_pos)
 
 paul@429    224 
        self.machine.result_context = data.context
 
 paul@429    225 
        self.machine.result_value = data.ref
 
 paul@261    226 
 
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    def builtins_list_len(self):
 
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        frame = self.local_sp_stack[-1]
 
 paul@261    229 
 
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        # Get the list address.
 
 paul@261    231 
 
 paul@264    232 
        obj_value = self.frame_stack[frame]
 
 paul@261    233 
 
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        # Get the fragment address.
 
 paul@261    235 
 
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        fragment = self.machine.load(obj_value.ref + self.instance_data_offset)
 
 paul@261    237 
 
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        # Get the fragment header.
 
 paul@261    239 
 
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        header = self.machine.load(fragment.ref)
 
 paul@408    241 
        nelements = header.occupied_size - self.fragment_data_offset
 
 paul@261    242 
 
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        # Make a new object.
 
 paul@261    244 
 
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        addr = self.machine._MakeObject(self.instance_size, self.int_instance)
 
 paul@261    246 
 
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        # Store the result.
 
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        # NOTE: The data is considered ready to use.
 
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        self.machine.save(addr + self.instance_data_offset, nelements)
 
 paul@261    251 
 
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        # Return the new object.
 
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        # Introduce object as context for the new object.
 
 paul@261    254 
 
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        self.machine.result_context = addr
 
 paul@429    256 
        self.machine.result_value = addr
 
 paul@261    257 
 
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    def builtins_list_append(self):
 
 paul@261    259 
        frame = self.local_sp_stack[-1]
 
 paul@261    260 
 
 paul@261    261 
        # Get operand address.
 
 paul@261    262 
 
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        arg_value = self.frame_stack[frame + 1]
 
 paul@261    264 
 
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        # Get the list address.
 
 paul@261    266 
 
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        obj_value = self.frame_stack[frame]
 
 paul@261    268 
 
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        # Get the fragment address.
 
 paul@261    270 
 
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        fragment = self.machine.load(obj_value.ref + self.instance_data_offset)
 
 paul@261    272 
 
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        # Get the fragment header.
 
 paul@261    274 
 
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        header = self.machine.load(fragment.ref)
 
 paul@261    276 
 
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        # Attempt to add the reference.
 
 paul@261    278 
 
 paul@261    279 
        if header.occupied_size < header.allocated_size:
 
 paul@264    280 
            self.machine.save(fragment.ref + header.occupied_size, arg_value)
 
 paul@261    281 
            header.occupied_size += 1
 
 paul@261    282 
        else:
 
 paul@261    283 
 
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            # Make a new fragment, maintaining more space than currently
 
 paul@261    285 
            # occupied in order to avoid reallocation.
 
 paul@261    286 
 
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            new_fragment = self.machine._MakeFragment(header.occupied_size + 1, header.occupied_size * 2)
 
 paul@261    288 
 
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            # Copy existing elements.
 
 paul@261    290 
 
 paul@408    291 
            for i in range(self.fragment_data_offset, header.occupied_size):
 
 paul@264    292 
                self.machine.save(new_fragment + i, self.machine.load(fragment.ref + i))
 
 paul@261    293 
 
 paul@336    294 
            self.machine.save(new_fragment + header.occupied_size, arg_value)
 
 paul@261    295 
 
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            # Set the new fragment in the object.
 
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            # NOTE: The old fragment could be deallocated.
 
 paul@261    298 
 
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            self.machine.save(obj_value.ref + self.instance_data_offset, DataValue(None, new_fragment))
 
 paul@261    300 
 
 paul@422    301 
    def builtins_tuple_new(self):
 
 paul@422    302 
        frame = self.local_sp_stack[-1]
 
 paul@422    303 
 
 paul@422    304 
        # Get the sequence address.
 
 paul@426    305 
        # The first argument should be empty since this function acts as an
 
 paul@426    306 
        # instantiator, and in instantiators the first argument is reserved so
 
 paul@426    307 
        # that it can be filled in for the call to an initialiser without
 
 paul@426    308 
        # allocating a new frame.
 
 paul@422    309 
 
 paul@422    310 
        obj_value = self.frame_stack[frame + 1]
 
 paul@422    311 
        return self._builtins_tuple(obj_value)
 
 paul@422    312 
 
 paul@408    313 
    def builtins_tuple(self):
 
 paul@408    314 
        frame = self.local_sp_stack[-1]
 
 paul@408    315 
 
 paul@422    316 
        # Get the sequence address.
 
 paul@408    317 
 
 paul@408    318 
        obj_value = self.frame_stack[frame]
 
 paul@422    319 
        return self._builtins_tuple(obj_value)
 
 paul@408    320 
 
 paul@422    321 
    def _builtins_tuple(self, obj_value):
 
 paul@422    322 
 
 paul@422    323 
        if self.machine._CheckInstance(obj_value.ref, self.tuple_class):
 
 paul@429    324 
            self.machine.result_context = obj_value.context
 
 paul@429    325 
            self.machine.result_value = obj_value.ref
 
 paul@422    326 
            return
 
 paul@422    327 
 
 paul@422    328 
        # Reject non-list, non-tuple types.
 
 paul@422    329 
        # NOTE: This should probably accept any sequence.
 
 paul@422    330 
 
 paul@422    331 
        elif not self.machine._CheckInstance(obj_value.ref, self.list_class):
 
 paul@408    332 
            self.machine.exception = self.machine._MakeObject(self.instance_size, self.type_error_instance)
 
 paul@408    333 
            return self.machine.RaiseException()
 
 paul@408    334 
 
 paul@408    335 
        # Get the fragment address.
 
 paul@408    336 
 
 paul@408    337 
        fragment = self.machine.load(obj_value.ref + self.instance_data_offset)
 
 paul@408    338 
 
 paul@408    339 
        # Get the fragment header.
 
 paul@408    340 
 
 paul@408    341 
        header = self.machine.load(fragment.ref)
 
 paul@408    342 
 
 paul@408    343 
        # Make a new object.
 
 paul@408    344 
 
 paul@408    345 
        addr = self.machine._MakeObject(self.instance_data_offset + header.occupied_size - self.fragment_data_offset, self.tuple_instance)
 
 paul@408    346 
 
 paul@408    347 
        # Copy the fragment contents into the tuple.
 
 paul@408    348 
        # NOTE: This might be done by repurposing the fragment in some situations.
 
 paul@408    349 
 
 paul@408    350 
        for i in range(self.fragment_data_offset, header.occupied_size):
 
 paul@408    351 
            self.machine.save(addr + self.instance_data_offset + i - self.fragment_data_offset, self.machine.load(fragment.ref + i))
 
 paul@408    352 
 
 paul@408    353 
        # Return the new object.
 
 paul@408    354 
        # Introduce object as context for the new object.
 
 paul@408    355 
 
 paul@429    356 
        self.machine.result_context = addr
 
 paul@429    357 
        self.machine.result_value = addr
 
 paul@408    358 
 
 paul@261    359 
    def builtins_tuple_len(self):
 
 paul@261    360 
        frame = self.local_sp_stack[-1]
 
 paul@261    361 
 
 paul@261    362 
        # Get the tuple address.
 
 paul@261    363 
 
 paul@264    364 
        obj_value = self.frame_stack[frame]
 
 paul@261    365 
 
 paul@261    366 
        # Get the header.
 
 paul@261    367 
 
 paul@264    368 
        header = self.machine.load(obj_value.ref)
 
 paul@395    369 
        nelements = header.size - self.instance_data_offset
 
 paul@261    370 
 
 paul@261    371 
        # Make a new object.
 
 paul@261    372 
 
 paul@395    373 
        addr = self.machine._MakeObject(self.instance_size, self.int_instance)
 
 paul@261    374 
 
 paul@261    375 
        # Store the result.
 
 paul@261    376 
        # NOTE: The data is considered ready to use.
 
 paul@261    377 
 
 paul@395    378 
        self.machine.save(addr + self.instance_data_offset, nelements)
 
 paul@261    379 
 
 paul@261    380 
        # Return the new object.
 
 paul@261    381 
        # Introduce object as context for the new object.
 
 paul@261    382 
 
 paul@429    383 
        self.machine.result_context = addr
 
 paul@429    384 
        self.machine.result_value = addr
 
 paul@261    385 
 
 paul@390    386 
    def builtins_tuple_get_single_item(self):
 
 paul@261    387 
        frame = self.local_sp_stack[-1]
 
 paul@261    388 
 
 paul@261    389 
        # Get the operand address.
 
 paul@261    390 
 
 paul@264    391 
        item_value = self.frame_stack[frame + 1]
 
 paul@261    392 
 
 paul@261    393 
        # Get the tuple address.
 
 paul@261    394 
 
 paul@264    395 
        obj_value = self.frame_stack[frame]
 
 paul@261    396 
 
 paul@261    397 
        # Get the header.
 
 paul@261    398 
 
 paul@264    399 
        header = self.machine.load(obj_value.ref)
 
 paul@395    400 
        nelements = header.size - self.instance_data_offset
 
 paul@261    401 
 
 paul@261    402 
        # NOTE: Assume single location for data and header.
 
 paul@261    403 
 
 paul@395    404 
        item_pos = self.machine.load(item_value.ref + self.instance_data_offset)
 
 paul@261    405 
 
 paul@391    406 
        if not self._check_index(item_pos, nelements):
 
 paul@395    407 
            self.machine.exception = self.machine._MakeObject(self.instance_size, self.index_error_instance)
 
 paul@261    408 
            return self.machine.RaiseException()
 
 paul@261    409 
 
 paul@395    410 
        # Get the item.
 
 paul@261    411 
 
 paul@429    412 
        data = self.machine.load(obj_value.ref + self.instance_data_offset + item_pos)
 
 paul@429    413 
        self.machine.result_context = data.context
 
 paul@429    414 
        self.machine.result_value = data.ref
 
 paul@261    415 
 
 paul@412    416 
    def builtins_getattr(self):
 
 paul@412    417 
        frame = self.local_sp_stack[-1]
 
 paul@412    418 
 
 paul@412    419 
        # Get the object, attribute name.
 
 paul@412    420 
 
 paul@412    421 
        obj_value = self.frame_stack[frame]
 
 paul@412    422 
        name_value = self.frame_stack[frame + 1]
 
 paul@412    423 
 
 paul@412    424 
        if not self.machine._CheckInstance(name_value.ref, self.accessor_class):
 
 paul@412    425 
            self.machine.exception = self.machine._MakeObject(self.instance_size, self.attr_error_instance)
 
 paul@412    426 
            return self.machine.RaiseException()
 
 paul@412    427 
 
 paul@412    428 
        # Get the object table index from the name. It is a bare integer, not a reference.
 
 paul@412    429 
 
 paul@412    430 
        index = self.machine.load(name_value.ref + self.instance_data_offset + 1)
 
 paul@412    431 
 
 paul@416    432 
        # NOTE: This is very much like LoadAttrIndexContextCond.
 
 paul@412    433 
 
 paul@412    434 
        data = self.machine.load(obj_value.ref)
 
 paul@412    435 
        element = self.machine.objlist[data.classcode + index]
 
 paul@412    436 
 
 paul@412    437 
        if element is not None:
 
 paul@412    438 
            attr_index, static_attr, offset = element
 
 paul@412    439 
            if attr_index == index:
 
 paul@412    440 
                if static_attr:
 
 paul@429    441 
                    loaded_data = self.machine.load(offset) # offset is address of class/module attribute
 
 paul@429    442 
                    if data.attrcode is not None: # absent attrcode == class/module
 
 paul@429    443 
                        loaded_data = self.machine._LoadAddressContextCond(loaded_data.context, loaded_data.ref, obj_value.ref)
 
 paul@412    444 
                else:
 
 paul@429    445 
                    loaded_data = self.machine.load(obj_value.ref + offset)
 
 paul@429    446 
                self.machine.result_context = loaded_data.context
 
 paul@429    447 
                self.machine.result_value = loaded_data.ref
 
 paul@412    448 
                return
 
 paul@412    449 
 
 paul@412    450 
        self.machine.exception = self.machine._MakeObject(self.instance_size, self.attr_error_instance)
 
 paul@412    451 
        return self.machine.RaiseException()
 
 paul@412    452 
 
 paul@377    453 
    def builtins_isinstance(self):
 
 paul@377    454 
        frame = self.local_sp_stack[-1]
 
 paul@377    455 
 
 paul@377    456 
        # Get the operand addresses.
 
 paul@377    457 
 
 paul@377    458 
        obj_value = self.frame_stack[frame]
 
 paul@377    459 
        cls_value = self.frame_stack[frame + 1]
 
 paul@377    460 
 
 paul@377    461 
        if self.machine._CheckInstance(obj_value.ref, cls_value.ref):
 
 paul@429    462 
            self.machine.result_context = self.constants[True]
 
 paul@429    463 
            self.machine.result_value = self.constants[True]
 
 paul@377    464 
        else:
 
 paul@429    465 
            self.machine.result_context = self.constants[False]
 
 paul@429    466 
            self.machine.result_value = self.constants[False]
 
 paul@377    467 
 
 paul@402    468 
    def builtins_print(self):
 
 paul@402    469 
        # NOTE: Do nothing for now.
 
 paul@402    470 
        pass
 
 paul@402    471 
 
 paul@402    472 
    def builtins_printnl(self):
 
 paul@402    473 
        # NOTE: Do nothing for now.
 
 paul@402    474 
        pass
 
 paul@402    475 
 
 paul@261    476 
    native_functions = {
 
 paul@261    477 
 
 paul@261    478 
        # Native method implementations:
 
 paul@261    479 
 
 paul@431    480 
        "native._int_add" : native_int_add,
 
 paul@431    481 
        "native._int_sub" : native_int_sub,
 
 paul@431    482 
        "native._int_pow" : native_int_pow,
 
 paul@431    483 
        "native._int_and" : native_int_and,
 
 paul@431    484 
        "native._int_or" : native_int_or,
 
 paul@431    485 
        "native._int_lt" : native_int_lt,
 
 paul@431    486 
        "native._int_gt" : native_int_gt,
 
 paul@431    487 
        "native._int_eq" : native_int_eq,
 
 paul@431    488 
        "native._str_lt" : native_str_lt,
 
 paul@431    489 
        "native._str_gt" : native_str_gt,
 
 paul@431    490 
        "native._str_eq" : native_str_eq,
 
 paul@261    491 
        "__builtins__.int.__neg__" : builtins_int_neg,
 
 paul@390    492 
        "__builtins__.list.__get_single_item__" : builtins_list_get_single_item,
 
 paul@261    493 
        "__builtins__.list.__len__" : builtins_list_len,
 
 paul@261    494 
        "__builtins__.list.append" : builtins_list_append,
 
 paul@422    495 
        "__builtins__.tuple" : builtins_tuple_new,
 
 paul@261    496 
        "__builtins__.tuple.__len__" : builtins_tuple_len,
 
 paul@390    497 
        "__builtins__.tuple.__get_single_item__" : builtins_tuple_get_single_item,
 
 paul@261    498 
 
 paul@261    499 
        # Native initialisers:
 
 paul@261    500 
 
 paul@431    501 
        "__builtins__.BaseException.__init__" : builtins_no_op, # NOTE: To be made distinct, potentially in the builtins module.
 
 paul@261    502 
 
 paul@412    503 
        # Native functions:
 
 paul@412    504 
 
 paul@412    505 
        "__builtins__._getattr" : builtins_getattr,
 
 paul@412    506 
 
 paul@332    507 
        # Native instantiator helpers:
 
 paul@261    508 
 
 paul@332    509 
        "__builtins__.list.__new__" : builtins_list_new,
 
 paul@377    510 
 
 paul@377    511 
        # Native helper functions:
 
 paul@377    512 
 
 paul@377    513 
        "__builtins__._isinstance" : builtins_isinstance,
 
 paul@402    514 
        "__builtins__._print" : builtins_print,
 
 paul@402    515 
        "__builtins__._printnl" : builtins_printnl,
 
 paul@408    516 
        "__builtins__._tuple" : builtins_tuple,
 
 paul@261    517 
        }
 
 paul@261    518 
 
 paul@261    519 
# vim: tabstop=4 expandtab shiftwidth=4