Feature #458 » 0001-generate_packets.py-allow-compatible-fields-with-sam.patch
| common/generate_packets.py | ||
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dataio stream."""
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raise NotImplementedError
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def _compat_keys(self, location: Location):
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"""Internal helper function. Yield keys to compare for
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type compatibility. See is_type_compatible()"""
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yield self.get_code_declaration(location)
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yield self.get_code_handle_param(location)
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yield self.get_code_handle_arg(location)
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yield self.get_code_fill(location)
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def is_type_compatible(self, other: "FieldType") -> bool:
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"""Determine whether two field types can be used interchangeably as
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part of the packet struct, i.e. differ in dataio transmission only"""
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if other is self:
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return True
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loc = Location("compat_test_field_name")
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return all(
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a == b
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for a, b in zip_longest(
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self._compat_keys(loc),
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other._compat_keys(loc),
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)
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)
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class BasicType(FieldType):
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"""Type information for a field without any specialized treatment"""
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| ... | ... | |
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"""Set of all capabilities affecting this field"""
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return self.flags.add_caps | self.flags.remove_caps
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def is_compatible(self, other: "Field") -> bool:
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"""Whether two field objects are variants of the same field, i.e.
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type-compatible in the packet struct and mutually exclusive based
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on their required capabilities.
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Note that this function does not test field name."""
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return bool(
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(
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(self.flags.add_caps & other.flags.remove_caps)
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or
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(self.flags.remove_caps & other.flags.add_caps)
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)
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and
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self.type_info.is_type_compatible(other.type_info)
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)
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def present_with_caps(self, caps: typing.Container[str]) -> bool:
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"""Determine whether this field should be part of a variant with the
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given capabilities"""
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| ... | ... | |
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use this variant"""
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self.fields = [
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field
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for field in packet.fields
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for field in packet.all_fields
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if field.present_with_caps(self.poscaps)
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]
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"""All fields that are transmitted when using this variant"""
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| ... | ... | |
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self.dirs = Directions(dirs)
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"""Which directions this packet can be sent in"""
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self.fields = [
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raw_fields = [
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field
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for line in lines
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for field in Field.parse(self.cfg, line, resolve_type)
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]
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"""List of all fields of this packet"""
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self.key_fields = [field for field in self.fields if field.is_key]
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"""List of only the key fields of this packet"""
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self.other_fields = [field for field in self.fields if not field.is_key]
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"""List of only the non-key fields of this packet"""
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# put key fields before all others
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key_fields = [field for field in raw_fields if field.is_key]
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other_fields = [field for field in raw_fields if not field.is_key]
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self.all_fields = key_fields + other_fields
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"""List of all fields of this packet, including name duplicates for
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different capability variants that are compatible.
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Only relevant for creating Variants; self.fields should be used when
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not dealing with capabilities or Variants."""
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self.fields = [Field(_, _, _, _) for _ in []]
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"""List of all fields of this packet, with only one field of each name"""
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# check for duplicate field names
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for next_field in self.all_fields:
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duplicates = [field for field in self.fields if field.name == next_field.name]
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if not duplicates:
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self.fields.append(next_field)
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continue
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if not all(field.is_compatible(next_field) for field in duplicates):
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raise ValueError("incompatible fields with duplicate name: %s(%d).%s"
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% (packet_type, packet_number, next_field.name))
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# valid, since self.fields is already set
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if self.no_packet:
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| ... | ... | |
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raise ValueError("requested dsend for %s without fields isn't useful" % self.name)
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# create cap variants
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all_caps = self.all_caps # valid, since self.fields is already set
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all_caps = self.all_caps # valid, since self.all_fields is already set
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self.variants = [
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Variant(caps, all_caps.difference(caps), self, i + 100)
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for i, caps in enumerate(powerset(sorted(all_caps)))
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| ... | ... | |
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@property
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def all_caps(self) -> "set[str]":
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"""Set of all capabilities affecting this packet"""
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return {cap for field in self.fields for cap in field.all_caps}
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return {cap for field in self.all_fields for cap in field.all_caps}
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def get_struct(self) -> str:
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| ... | ... | |
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body = "".join(
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prefix(" ", field.get_declar())
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for field in chain(self.key_fields, self.other_fields)
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for field in self.fields
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) or """\
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char __dummy; /* to avoid malloc(0); */
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"""
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