mirror of
https://github.com/catseye/SixtyPical.git
synced 2024-06-18 03:29:32 +00:00
161 lines
4.5 KiB
Python
161 lines
4.5 KiB
Python
"""Data/storage model for SixtyPical."""
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class Type(object):
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def __init__(self, name):
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self.name = name
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def __repr__(self):
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return 'Type(%r)' % self.name
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def __eq__(self, other):
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return isinstance(other, Type) and other.name == self.name
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def __hash__(self):
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return hash(self.name)
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TYPE_BIT = Type('bit')
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TYPE_BYTE = Type('byte')
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TYPE_BYTE_TABLE = Type('byte table')
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TYPE_WORD = Type('word')
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TYPE_WORD_TABLE = Type('word table')
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class ExecutableType(Type):
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"""Used for routines and vectors."""
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def __init__(self, name, inputs=None, outputs=None, trashes=None):
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self.name = name
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self.inputs = inputs or set()
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self.outputs = outputs or set()
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self.trashes = trashes or set()
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def __repr__(self):
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return 'RoutineType(%r, inputs=%r, outputs=%r, trashes=%r)' % (
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self.name, self.inputs, self.outputs, self.trashes
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)
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def __eq__(self, other):
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return isinstance(other, RoutineType) and (
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other.name == self.name and
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other.inputs == self.inputs and
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other.outputs == self.outputs and
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other.trashes == self.trashes
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)
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def __hash__(self):
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return hash(self.name) ^ hash(self.inputs) ^ hash(self.outputs) ^ hash(self.trashes)
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class RoutineType(ExecutableType):
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"""This memory location contains the code for a routine."""
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def __init__(self, **kwargs):
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super(RoutineType, self).__init__('routine', **kwargs)
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class VectorType(ExecutableType):
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"""This memory location contains the address of a routine."""
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def __init__(self, **kwargs):
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super(VectorType, self).__init__('vector', **kwargs)
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class BufferType(Type):
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def __init__(self, size):
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self.size = size
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self.name = 'buffer[%s]' % self.size
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class PointerType(Type):
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def __init__(self):
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self.name = 'pointer'
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class Ref(object):
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def is_constant(self):
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"""read-only means that the program cannot change the value
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of a location. constant means that the value of the location
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will not change during the lifetime of the program."""
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raise NotImplementedError
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class LocationRef(Ref):
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def __init__(self, type, name):
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self.type = type
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self.name = name
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def __eq__(self, other):
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# Ordinarily there will only be one ref with a given name,
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# but because we store the type in here and we want to treat
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# these objects as immutable, we compare the types, too.
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# Not sure if very wise.
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return isinstance(other, LocationRef) and (
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other.name == self.name and other.type == self.type
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)
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def __hash__(self):
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return hash(self.name + str(self.type))
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def __repr__(self):
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return '%s(%r, %r)' % (self.__class__.__name__, self.type, self.name)
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def is_constant(self):
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return isinstance(self.type, RoutineType)
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class PartRef(Ref):
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"""For 'low byte of' location and 'high byte of' location modifiers.
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height=0 = low byte, height=1 = high byte.
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NOTE: Not actually used yet. Might require more thought before it's usable.
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"""
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def __init__(self, ref, height):
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assert isinstance(ref, Ref)
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assert ref.type == TYPE_WORD
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self.ref = ref
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self.height = height
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self.type = TYPE_BYTE
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def __eq__(self, other):
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return isinstance(other, PartRef) and (
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other.height == self.height and other.ref == self.ref
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)
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def __hash__(self):
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return hash(self.ref) ^ hash(self.height) ^ hash(self.type)
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def __repr__(self):
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return '%s(%r, %r)' % (self.__class__.__name__, self.ref, self.height)
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def is_constant(self):
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return self.ref.is_constant()
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class ConstantRef(Ref):
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def __init__(self, type, value):
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self.type = type
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self.value = value
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def __eq__(self, other):
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return isinstance(other, ConstantRef) and (
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other.type == self.type and other.value == self.value
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)
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def __hash__(self):
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return hash(str(self.value) + str(self.type))
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def __repr__(self):
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return '%s(%r, %r)' % (self.__class__.__name__, self.type, self.value)
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def is_constant(self):
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return True
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REG_A = LocationRef(TYPE_BYTE, 'a')
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REG_X = LocationRef(TYPE_BYTE, 'x')
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REG_Y = LocationRef(TYPE_BYTE, 'y')
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FLAG_Z = LocationRef(TYPE_BIT, 'z')
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FLAG_C = LocationRef(TYPE_BIT, 'c')
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FLAG_N = LocationRef(TYPE_BIT, 'n')
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FLAG_V = LocationRef(TYPE_BIT, 'v')
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