visible is true iff the field should be in the request API.
wire is true iff the field should be in the request structure.
auto is true iff the field is on the wire but not in the request API (e.g. opcode)
+ enum is the enum name this field refers to, if any.
'''
- def __init__(self, type, field_type, field_name, visible, wire, auto):
+ def __init__(self, type, field_type, field_name, visible, wire, auto, enum=None, isfd=False):
self.type = type
self.field_type = field_type
self.field_name = field_name
+ self.enum = enum
self.visible = visible
self.wire = wire
self.auto = auto
+ self.isfd = isfd
+ self.parent = None
class Expression(object):
Represents a mathematical expression for a list length or exprfield.
Public fields:
- op is the operation (text +,*,/,<<) or None.
+ op is the operation (text +,*,/,<<,~) or None.
lhs and rhs are the sub-Expressions if op is set.
lenfield_name is the name of the length field, or None for request lists.
lenfield is the Field object for the length field, or None.
self.lenfield_name = None
self.lenfield_type = None
+ self.lenfield_parent = None
self.lenfield = None
self.lenwire = False
self.bitfield = False
if self.lenfield_name == None:
self.lenfield_name = self.rhs.lenfield_name
+ elif elt.tag == 'unop':
+ # Op field. Need to recurse.
+ self.op = elt.get('op')
+ self.rhs = Expression(list(elt)[0], parent)
+
+ self.lenfield_name = self.rhs.lenfield_name
+
elif elt.tag == 'value':
# Constant expression
self.nmemb = int(elt.text, 0)
+ elif elt.tag == 'popcount':
+ self.op = 'popcount'
+ self.rhs = Expression(list(elt)[0], parent)
+ self.lenfield_name = self.rhs.lenfield_name
+ # xcb_popcount returns 'int' - handle the type in the language-specific part
+
+ elif elt.tag == 'enumref':
+ self.op = 'enumref'
+ self.lenfield_name = (elt.get('ref'), elt.text)
+
+ elif elt.tag == 'sumof':
+ self.op = 'sumof'
+ self.lenfield_name = elt.get('ref')
+ subexpressions = list(elt)
+ if len(subexpressions) > 0:
+ # sumof with a nested expression which is to be evaluated
+ # for each list-element in the context of that list-element.
+ # sumof then returns the sum of the results of these evaluations
+ self.rhs = Expression(subexpressions[0], parent)
+
else:
# Notreached
- raise Exception('XXX')
-
+ raise Exception("undefined tag '%s'" % elt.tag)
def fixed_size(self):
return self.nmemb != None
+
+ def resolve(self, module, parents):
+ if self.op == 'enumref':
+ self.lenfield_type = module.get_type(self.lenfield_name[0])
+ self.lenfield_name = self.lenfield_name[1]
+ elif self.op == 'sumof':
+ # need to find the field with lenfield_name
+ for p in reversed(parents):
+ fields = dict([(f.field_name, f) for f in p.fields])
+ if self.lenfield_name in fields.keys():
+ if p.is_case_or_bitcase:
+ # switch is the anchestor
+ self.lenfield_parent = p.parents[-1]
+ else:
+ self.lenfield_parent = p
+ self.lenfield_type = fields[self.lenfield_name].field_type
+ break
+