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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 2019 Hiroshi Murayama <opiopan@gmail.com>
import operator
from ..utils import *
from ..am_eval import OpCode
from ..am_statements import *
class AMExpression(object):
CONSTANT = 1
VARIABLE = 2
OPERATOR = 3
def __init__(self, kind):
self.kind = kind
@property
def value(self):
return self
def optimize(self):
return self
def to_inch(self):
return AMOperatorExpression.div(self, MILLIMETERS_PER_INCH)
def to_metric(self):
return AMOperatorExpression.mul(self, MILLIMETERS_PER_INCH)
#def to_gerber(self, settings=None):
# pass
#def to_instructions(self):
# pass
class AMConstantExpression(AMExpression):
def __init__(self, value):
super(AMConstantExpression, self).__init__(AMExpression.CONSTANT)
self._value = value
@property
def value(self):
return self._value
def __float__(self):
return float(self._value)
@staticmethod
def _amex_val(other):
return float(other) if isinstance(other, AMConstantExpression) else other
def __eq__(self, val):
return self._value == AMConstantExpression._amex_val(val)
def __ne__(self, val):
return self._value != AMConstantExpression._amex_val(val)
def __lt__(self, val):
return self._value < AMConstantExpression._amex_val(val)
def __gt__(self, val):
return self._value > AMConstantExpression._amex_val(val)
def __le__(self, val):
return self._value <= AMConstantExpression._amex_val(val)
def __ge__(self, val):
return self._value >= AMConstantExpression._amex_val(val)
def to_gerber(self, settings=None):
if isinstance(self._value, str):
return self._value
return f'{self.value:.6f}'.rstrip('0').rstrip('.')
def to_instructions(self):
return [(OpCode.PUSH, self._value)]
class AMVariableExpression(AMExpression):
def __init__(self, number):
super(AMVariableExpression, self).__init__(AMExpression.VARIABLE)
self.number = number
def to_gerber(self, settings=None):
return f'${self.number}'
def to_instructions(self):
return (OpCode.LOAD, self.number)
class AMOperatorExpression(AMExpression):
def __init__(self, op, lvalue, rvalue):
super(AMOperatorExpression, self).__init__(AMExpression.OPERATOR)
self.op = op
self.lvalue = AMConstantExpression(lvalue) if isinstance(lvalue, (int, float)) else lvalue
self.rvalue = AMConstantExpression(rvalue) if isinstance(rvalue, (int, float)) else rvalue
@classmethod
def add(kls, lvalue, rvalue):
return kls(operator.add, lvalue, rvalue)
@classmethod
def sub(kls, lvalue, rvalue):
return kls(operator.sub, lvalue, rvalue)
@classmethod
def mul(kls, lvalue, rvalue):
return kls(operator.mul, lvalue, rvalue)
@classmethod
def div(kls, lvalue, rvalue):
return kls(operator.truediv, lvalue, rvalue)
def optimize(self):
l = self.lvalue = self.lvalue.optimize()
r = self.rvalue = self.rvalue.optimize()
if isinstance(l, AMConstantExpression) and isinstance(r, AMConstantExpression):
return AMConstantExpression(self.op(float(r), float(l)))
elif self.op == operator.ADD:
if r == 0:
return l
elif l == 0:
return r
elif self.op == operator.SUB:
if r == 0:
return l
elif l == 0 and isinstance(r, AMConstantExpression):
return AMConstantExpression(-float(r))
elif self.op == operator.MUL:
if r == 1:
return l
elif l == 1:
return r
elif l == 0 or r == 0:
return AMConstantExpression(0)
elif self.op == operator.TRUEDIV:
if r == 1:
return self.lvalue
elif l == 0:
return AMConstantExpression(0)
return self
def to_gerber(self, settings=None):
lval = self.lvalue.to_gerber(settings)
rval = self.rvalue.to_gerber(settings))
op = {AMOperatorExpression.ADD: '+',
AMOperatorExpression.SUB: '-',
AMOperatorExpression.MUL: 'x',
AMOperatorExpression.DIV: '/'} [self.op]
return '(' + lval + op + rval + ')'
def to_instructions(self):
for i in self.lvalue.to_instructions():
yield i
for i in self.rvalue.to_instructions():
yield i
op = {AMOperatorExpression.ADD: OpCode.ADD,
AMOperatorExpression.SUB: OpCode.SUB,
AMOperatorExpression.MUL: OpCode.MUL,
AMOperatorExpression.DIV: OpCode.DIV} [self.op]
yield (op, None)
def eval_macro(instructions):
stack = []
def pop():
return stack.pop()
def push(op):
stack.append(op)
def top():
return stack[-1]
def empty():
return len(stack) == 0
for opcode, argument in instructions:
if opcode == OpCode.PUSH:
push(AMConstantExpression(argument))
elif opcode == OpCode.LOAD:
push(AMVariableExpression(argument))
elif opcode == OpCode.STORE:
yield (-argument, [pop()])
elif opcode == OpCode.ADD:
op1 = pop()
op2 = pop()
push(AMOperatorExpression(AMOperatorExpression.ADD, op2, op1))
elif opcode == OpCode.SUB:
op1 = pop()
op2 = pop()
push(AMOperatorExpression(AMOperatorExpression.SUB, op2, op1))
elif opcode == OpCode.MUL:
op1 = pop()
op2 = pop()
push(AMOperatorExpression(AMOperatorExpression.MUL, op2, op1))
elif opcode == OpCode.DIV:
op1 = pop()
op2 = pop()
push(AMOperatorExpression(AMOperatorExpression.DIV, op2, op1))
elif opcode == OpCode.PRIM:
yield (argument, stack)
stack = []
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