def from_xml(t):
s = Switch()
if t.get('location'):
s.location = Location(t.get('location'))
s.expr = expression.expression_from_xml(descend_one(t.find('index')))
if t.find('default') is not None:
s.default = int(t.find('default').get('id'))
for c in t.findall('case'):
if len(c.getchildren()) == 1:
k = descend_one(c)
assert k.tag == 'exact', 'strange case label'
s.mapping[constant.convert(descend_one(k))] = int(c.get('id'))
else:
assert len(c.getchildren()) == 2, 'strange case label'
low, high = c.getchildren()
assert low.tag == 'low-bound'
assert high.tag == 'high-bound'
low_const, high_const = constant.convert(descend_one(low)).get_value(), constant.convert(descend_one(high)).get_value()
for x in range(low_const, high_const + 1):
s.mapping[x] = int(c.get('id'))
return s
def expression_from_xml(t):
if t.tag in valid_lvalues:
return result_from_xml(t)
if t.tag in ('constant',):
return constant.convert(t)
if t.tag in binary_operators.keys():
return BinaryOp(binary_operators[t.tag])
if t.tag in unary_operators.keys():
return UnaryOp(unary_operators[t.tag])
if t.tag == 'addr-of':
return AddrOf(t)
if t.tag == 'void':
return Void()
if t.tag == 'function':
return expression_from_xml(descend_one(t))
print 'warn: tag %s unhandled, returning dummy bound' % (t.tag)
dump(t)
return Bound()
