86cc2ff65a
It's already treated as optional, with one direct caller and some subclass callers passing 'None'. Make it officially optional, which requires moving the position of the argument to come after all required parameters. QAPISemError becomes functionally identical to QAPISourceError. Keep the name to preserve its semantic meaning and avoid code churn, but remove the now-useless __init__ wrapper. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210421192233.3542904-4-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
1177 lines
41 KiB
Python
1177 lines
41 KiB
Python
# -*- coding: utf-8 -*-
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#
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# QAPI schema internal representation
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#
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# Copyright (c) 2015-2019 Red Hat Inc.
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#
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# Authors:
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# Markus Armbruster <armbru@redhat.com>
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# Eric Blake <eblake@redhat.com>
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# Marc-André Lureau <marcandre.lureau@redhat.com>
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#
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# This work is licensed under the terms of the GNU GPL, version 2.
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# See the COPYING file in the top-level directory.
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# TODO catching name collisions in generated code would be nice
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from collections import OrderedDict
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import os
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import re
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from typing import Optional
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from .common import POINTER_SUFFIX, c_name
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from .error import QAPISemError, QAPISourceError
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from .expr import check_exprs
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from .parser import QAPISchemaParser
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class QAPISchemaEntity:
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meta: Optional[str] = None
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def __init__(self, name: str, info, doc, ifcond=None, features=None):
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assert name is None or isinstance(name, str)
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for f in features or []:
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assert isinstance(f, QAPISchemaFeature)
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f.set_defined_in(name)
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self.name = name
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self._module = None
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# For explicitly defined entities, info points to the (explicit)
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# definition. For builtins (and their arrays), info is None.
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# For implicitly defined entities, info points to a place that
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# triggered the implicit definition (there may be more than one
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# such place).
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self.info = info
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self.doc = doc
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self._ifcond = ifcond or []
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self.features = features or []
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self._checked = False
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def c_name(self):
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return c_name(self.name)
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def check(self, schema):
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assert not self._checked
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seen = {}
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for f in self.features:
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f.check_clash(self.info, seen)
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self._checked = True
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def connect_doc(self, doc=None):
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doc = doc or self.doc
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if doc:
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for f in self.features:
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doc.connect_feature(f)
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def check_doc(self):
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if self.doc:
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self.doc.check()
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def _set_module(self, schema, info):
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assert self._checked
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fname = info.fname if info else QAPISchemaModule.BUILTIN_MODULE_NAME
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self._module = schema.module_by_fname(fname)
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self._module.add_entity(self)
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def set_module(self, schema):
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self._set_module(schema, self.info)
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@property
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def ifcond(self):
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assert self._checked
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return self._ifcond
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def is_implicit(self):
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return not self.info
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def visit(self, visitor):
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assert self._checked
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def describe(self):
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assert self.meta
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return "%s '%s'" % (self.meta, self.name)
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class QAPISchemaVisitor:
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def visit_begin(self, schema):
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pass
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def visit_end(self):
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pass
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def visit_module(self, name):
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pass
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def visit_needed(self, entity):
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# Default to visiting everything
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return True
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def visit_include(self, name, info):
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pass
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def visit_builtin_type(self, name, info, json_type):
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pass
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def visit_enum_type(self, name, info, ifcond, features, members, prefix):
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pass
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def visit_array_type(self, name, info, ifcond, element_type):
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pass
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def visit_object_type(self, name, info, ifcond, features,
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base, members, variants):
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pass
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def visit_object_type_flat(self, name, info, ifcond, features,
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members, variants):
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pass
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def visit_alternate_type(self, name, info, ifcond, features, variants):
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pass
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def visit_command(self, name, info, ifcond, features,
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arg_type, ret_type, gen, success_response, boxed,
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allow_oob, allow_preconfig, coroutine):
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pass
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def visit_event(self, name, info, ifcond, features, arg_type, boxed):
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pass
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class QAPISchemaModule:
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BUILTIN_MODULE_NAME = './builtin'
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def __init__(self, name):
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self.name = name
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self._entity_list = []
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@staticmethod
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def is_system_module(name: str) -> bool:
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"""
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System modules are internally defined modules.
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Their names start with the "./" prefix.
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"""
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return name.startswith('./')
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@classmethod
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def is_user_module(cls, name: str) -> bool:
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"""
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User modules are those defined by the user in qapi JSON files.
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They do not start with the "./" prefix.
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"""
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return not cls.is_system_module(name)
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@classmethod
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def is_builtin_module(cls, name: str) -> bool:
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"""
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The built-in module is a single System module for the built-in types.
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It is always "./builtin".
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"""
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return name == cls.BUILTIN_MODULE_NAME
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def add_entity(self, ent):
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self._entity_list.append(ent)
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def visit(self, visitor):
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visitor.visit_module(self.name)
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for entity in self._entity_list:
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if visitor.visit_needed(entity):
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entity.visit(visitor)
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class QAPISchemaInclude(QAPISchemaEntity):
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def __init__(self, sub_module, info):
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super().__init__(None, info, None)
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self._sub_module = sub_module
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def visit(self, visitor):
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super().visit(visitor)
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visitor.visit_include(self._sub_module.name, self.info)
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class QAPISchemaType(QAPISchemaEntity):
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# Return the C type for common use.
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# For the types we commonly box, this is a pointer type.
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def c_type(self):
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pass
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# Return the C type to be used in a parameter list.
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def c_param_type(self):
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return self.c_type()
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# Return the C type to be used where we suppress boxing.
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def c_unboxed_type(self):
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return self.c_type()
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def json_type(self):
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pass
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def alternate_qtype(self):
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json2qtype = {
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'null': 'QTYPE_QNULL',
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'string': 'QTYPE_QSTRING',
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'number': 'QTYPE_QNUM',
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'int': 'QTYPE_QNUM',
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'boolean': 'QTYPE_QBOOL',
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'object': 'QTYPE_QDICT'
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}
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return json2qtype.get(self.json_type())
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def doc_type(self):
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if self.is_implicit():
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return None
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return self.name
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def check(self, schema):
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QAPISchemaEntity.check(self, schema)
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if 'deprecated' in [f.name for f in self.features]:
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raise QAPISemError(
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self.info, "feature 'deprecated' is not supported for types")
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def describe(self):
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assert self.meta
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return "%s type '%s'" % (self.meta, self.name)
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class QAPISchemaBuiltinType(QAPISchemaType):
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meta = 'built-in'
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def __init__(self, name, json_type, c_type):
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super().__init__(name, None, None)
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assert not c_type or isinstance(c_type, str)
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assert json_type in ('string', 'number', 'int', 'boolean', 'null',
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'value')
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self._json_type_name = json_type
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self._c_type_name = c_type
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def c_name(self):
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return self.name
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def c_type(self):
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return self._c_type_name
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def c_param_type(self):
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if self.name == 'str':
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return 'const ' + self._c_type_name
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return self._c_type_name
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def json_type(self):
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return self._json_type_name
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def doc_type(self):
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return self.json_type()
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def visit(self, visitor):
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super().visit(visitor)
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visitor.visit_builtin_type(self.name, self.info, self.json_type())
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class QAPISchemaEnumType(QAPISchemaType):
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meta = 'enum'
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def __init__(self, name, info, doc, ifcond, features, members, prefix):
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super().__init__(name, info, doc, ifcond, features)
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for m in members:
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assert isinstance(m, QAPISchemaEnumMember)
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m.set_defined_in(name)
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assert prefix is None or isinstance(prefix, str)
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self.members = members
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self.prefix = prefix
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def check(self, schema):
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super().check(schema)
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seen = {}
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for m in self.members:
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m.check_clash(self.info, seen)
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def connect_doc(self, doc=None):
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super().connect_doc(doc)
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doc = doc or self.doc
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for m in self.members:
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m.connect_doc(doc)
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def is_implicit(self):
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# See QAPISchema._make_implicit_enum_type() and ._def_predefineds()
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return self.name.endswith('Kind') or self.name == 'QType'
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def c_type(self):
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return c_name(self.name)
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def member_names(self):
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return [m.name for m in self.members]
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def json_type(self):
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return 'string'
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def visit(self, visitor):
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super().visit(visitor)
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visitor.visit_enum_type(
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self.name, self.info, self.ifcond, self.features,
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self.members, self.prefix)
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class QAPISchemaArrayType(QAPISchemaType):
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meta = 'array'
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def __init__(self, name, info, element_type):
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super().__init__(name, info, None)
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assert isinstance(element_type, str)
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self._element_type_name = element_type
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self.element_type = None
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def check(self, schema):
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super().check(schema)
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self.element_type = schema.resolve_type(
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self._element_type_name, self.info,
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self.info and self.info.defn_meta)
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assert not isinstance(self.element_type, QAPISchemaArrayType)
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def set_module(self, schema):
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self._set_module(schema, self.element_type.info)
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@property
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def ifcond(self):
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assert self._checked
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return self.element_type.ifcond
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def is_implicit(self):
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return True
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def c_type(self):
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return c_name(self.name) + POINTER_SUFFIX
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def json_type(self):
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return 'array'
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def doc_type(self):
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elt_doc_type = self.element_type.doc_type()
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if not elt_doc_type:
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return None
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return 'array of ' + elt_doc_type
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def visit(self, visitor):
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super().visit(visitor)
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visitor.visit_array_type(self.name, self.info, self.ifcond,
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self.element_type)
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def describe(self):
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assert self.meta
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return "%s type ['%s']" % (self.meta, self._element_type_name)
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class QAPISchemaObjectType(QAPISchemaType):
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def __init__(self, name, info, doc, ifcond, features,
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base, local_members, variants):
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# struct has local_members, optional base, and no variants
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# flat union has base, variants, and no local_members
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# simple union has local_members, variants, and no base
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super().__init__(name, info, doc, ifcond, features)
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self.meta = 'union' if variants else 'struct'
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assert base is None or isinstance(base, str)
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for m in local_members:
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assert isinstance(m, QAPISchemaObjectTypeMember)
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m.set_defined_in(name)
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if variants is not None:
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assert isinstance(variants, QAPISchemaVariants)
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variants.set_defined_in(name)
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self._base_name = base
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self.base = None
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self.local_members = local_members
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self.variants = variants
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self.members = None
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def check(self, schema):
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# This calls another type T's .check() exactly when the C
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# struct emitted by gen_object() contains that T's C struct
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# (pointers don't count).
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if self.members is not None:
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# A previous .check() completed: nothing to do
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return
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if self._checked:
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# Recursed: C struct contains itself
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raise QAPISemError(self.info,
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"object %s contains itself" % self.name)
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super().check(schema)
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assert self._checked and self.members is None
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seen = OrderedDict()
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if self._base_name:
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self.base = schema.resolve_type(self._base_name, self.info,
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"'base'")
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if (not isinstance(self.base, QAPISchemaObjectType)
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or self.base.variants):
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raise QAPISemError(
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self.info,
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"'base' requires a struct type, %s isn't"
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% self.base.describe())
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self.base.check(schema)
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self.base.check_clash(self.info, seen)
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for m in self.local_members:
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m.check(schema)
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m.check_clash(self.info, seen)
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members = seen.values()
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if self.variants:
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self.variants.check(schema, seen)
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self.variants.check_clash(self.info, seen)
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self.members = members # mark completed
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# Check that the members of this type do not cause duplicate JSON members,
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# and update seen to track the members seen so far. Report any errors
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# on behalf of info, which is not necessarily self.info
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def check_clash(self, info, seen):
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assert self._checked
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assert not self.variants # not implemented
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for m in self.members:
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m.check_clash(info, seen)
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def connect_doc(self, doc=None):
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super().connect_doc(doc)
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doc = doc or self.doc
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if self.base and self.base.is_implicit():
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self.base.connect_doc(doc)
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for m in self.local_members:
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m.connect_doc(doc)
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@property
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def ifcond(self):
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assert self._checked
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if isinstance(self._ifcond, QAPISchemaType):
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# Simple union wrapper type inherits from wrapped type;
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# see _make_implicit_object_type()
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return self._ifcond.ifcond
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return self._ifcond
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def is_implicit(self):
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# See QAPISchema._make_implicit_object_type(), as well as
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# _def_predefineds()
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return self.name.startswith('q_')
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def is_empty(self):
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assert self.members is not None
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return not self.members and not self.variants
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def c_name(self):
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assert self.name != 'q_empty'
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return super().c_name()
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def c_type(self):
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assert not self.is_implicit()
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return c_name(self.name) + POINTER_SUFFIX
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def c_unboxed_type(self):
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return c_name(self.name)
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def json_type(self):
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return 'object'
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def visit(self, visitor):
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super().visit(visitor)
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visitor.visit_object_type(
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self.name, self.info, self.ifcond, self.features,
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self.base, self.local_members, self.variants)
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visitor.visit_object_type_flat(
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self.name, self.info, self.ifcond, self.features,
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self.members, self.variants)
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class QAPISchemaAlternateType(QAPISchemaType):
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meta = 'alternate'
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def __init__(self, name, info, doc, ifcond, features, variants):
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super().__init__(name, info, doc, ifcond, features)
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assert isinstance(variants, QAPISchemaVariants)
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assert variants.tag_member
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variants.set_defined_in(name)
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variants.tag_member.set_defined_in(self.name)
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self.variants = variants
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def check(self, schema):
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super().check(schema)
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self.variants.tag_member.check(schema)
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# Not calling self.variants.check_clash(), because there's nothing
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# to clash with
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self.variants.check(schema, {})
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# Alternate branch names have no relation to the tag enum values;
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# so we have to check for potential name collisions ourselves.
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seen = {}
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types_seen = {}
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for v in self.variants.variants:
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v.check_clash(self.info, seen)
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qtype = v.type.alternate_qtype()
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if not qtype:
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raise QAPISemError(
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self.info,
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"%s cannot use %s"
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% (v.describe(self.info), v.type.describe()))
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conflicting = set([qtype])
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if qtype == 'QTYPE_QSTRING':
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if isinstance(v.type, QAPISchemaEnumType):
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for m in v.type.members:
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if m.name in ['on', 'off']:
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conflicting.add('QTYPE_QBOOL')
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if re.match(r'[-+0-9.]', m.name):
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# lazy, could be tightened
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conflicting.add('QTYPE_QNUM')
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else:
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conflicting.add('QTYPE_QNUM')
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conflicting.add('QTYPE_QBOOL')
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for qt in conflicting:
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if qt in types_seen:
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raise QAPISemError(
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self.info,
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"%s can't be distinguished from '%s'"
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% (v.describe(self.info), types_seen[qt]))
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types_seen[qt] = v.name
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def connect_doc(self, doc=None):
|
|
super().connect_doc(doc)
|
|
doc = doc or self.doc
|
|
for v in self.variants.variants:
|
|
v.connect_doc(doc)
|
|
|
|
def c_type(self):
|
|
return c_name(self.name) + POINTER_SUFFIX
|
|
|
|
def json_type(self):
|
|
return 'value'
|
|
|
|
def visit(self, visitor):
|
|
super().visit(visitor)
|
|
visitor.visit_alternate_type(
|
|
self.name, self.info, self.ifcond, self.features, self.variants)
|
|
|
|
|
|
class QAPISchemaVariants:
|
|
def __init__(self, tag_name, info, tag_member, variants):
|
|
# Flat unions pass tag_name but not tag_member.
|
|
# Simple unions and alternates pass tag_member but not tag_name.
|
|
# After check(), tag_member is always set, and tag_name remains
|
|
# a reliable witness of being used by a flat union.
|
|
assert bool(tag_member) != bool(tag_name)
|
|
assert (isinstance(tag_name, str) or
|
|
isinstance(tag_member, QAPISchemaObjectTypeMember))
|
|
for v in variants:
|
|
assert isinstance(v, QAPISchemaVariant)
|
|
self._tag_name = tag_name
|
|
self.info = info
|
|
self.tag_member = tag_member
|
|
self.variants = variants
|
|
|
|
def set_defined_in(self, name):
|
|
for v in self.variants:
|
|
v.set_defined_in(name)
|
|
|
|
def check(self, schema, seen):
|
|
if not self.tag_member: # flat union
|
|
self.tag_member = seen.get(c_name(self._tag_name))
|
|
base = "'base'"
|
|
# Pointing to the base type when not implicit would be
|
|
# nice, but we don't know it here
|
|
if not self.tag_member or self._tag_name != self.tag_member.name:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"discriminator '%s' is not a member of %s"
|
|
% (self._tag_name, base))
|
|
# Here we do:
|
|
base_type = schema.lookup_type(self.tag_member.defined_in)
|
|
assert base_type
|
|
if not base_type.is_implicit():
|
|
base = "base type '%s'" % self.tag_member.defined_in
|
|
if not isinstance(self.tag_member.type, QAPISchemaEnumType):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"discriminator member '%s' of %s must be of enum type"
|
|
% (self._tag_name, base))
|
|
if self.tag_member.optional:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"discriminator member '%s' of %s must not be optional"
|
|
% (self._tag_name, base))
|
|
if self.tag_member.ifcond:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"discriminator member '%s' of %s must not be conditional"
|
|
% (self._tag_name, base))
|
|
else: # simple union
|
|
assert isinstance(self.tag_member.type, QAPISchemaEnumType)
|
|
assert not self.tag_member.optional
|
|
assert self.tag_member.ifcond == []
|
|
if self._tag_name: # flat union
|
|
# branches that are not explicitly covered get an empty type
|
|
cases = {v.name for v in self.variants}
|
|
for m in self.tag_member.type.members:
|
|
if m.name not in cases:
|
|
v = QAPISchemaVariant(m.name, self.info,
|
|
'q_empty', m.ifcond)
|
|
v.set_defined_in(self.tag_member.defined_in)
|
|
self.variants.append(v)
|
|
if not self.variants:
|
|
raise QAPISemError(self.info, "union has no branches")
|
|
for v in self.variants:
|
|
v.check(schema)
|
|
# Union names must match enum values; alternate names are
|
|
# checked separately. Use 'seen' to tell the two apart.
|
|
if seen:
|
|
if v.name not in self.tag_member.type.member_names():
|
|
raise QAPISemError(
|
|
self.info,
|
|
"branch '%s' is not a value of %s"
|
|
% (v.name, self.tag_member.type.describe()))
|
|
if (not isinstance(v.type, QAPISchemaObjectType)
|
|
or v.type.variants):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"%s cannot use %s"
|
|
% (v.describe(self.info), v.type.describe()))
|
|
v.type.check(schema)
|
|
|
|
def check_clash(self, info, seen):
|
|
for v in self.variants:
|
|
# Reset seen map for each variant, since qapi names from one
|
|
# branch do not affect another branch
|
|
v.type.check_clash(info, dict(seen))
|
|
|
|
|
|
class QAPISchemaMember:
|
|
""" Represents object members, enum members and features """
|
|
role = 'member'
|
|
|
|
def __init__(self, name, info, ifcond=None):
|
|
assert isinstance(name, str)
|
|
self.name = name
|
|
self.info = info
|
|
self.ifcond = ifcond or []
|
|
self.defined_in = None
|
|
|
|
def set_defined_in(self, name):
|
|
assert not self.defined_in
|
|
self.defined_in = name
|
|
|
|
def check_clash(self, info, seen):
|
|
cname = c_name(self.name)
|
|
if cname in seen:
|
|
raise QAPISemError(
|
|
info,
|
|
"%s collides with %s"
|
|
% (self.describe(info), seen[cname].describe(info)))
|
|
seen[cname] = self
|
|
|
|
def connect_doc(self, doc):
|
|
if doc:
|
|
doc.connect_member(self)
|
|
|
|
def describe(self, info):
|
|
role = self.role
|
|
defined_in = self.defined_in
|
|
assert defined_in
|
|
|
|
if defined_in.startswith('q_obj_'):
|
|
# See QAPISchema._make_implicit_object_type() - reverse the
|
|
# mapping there to create a nice human-readable description
|
|
defined_in = defined_in[6:]
|
|
if defined_in.endswith('-arg'):
|
|
# Implicit type created for a command's dict 'data'
|
|
assert role == 'member'
|
|
role = 'parameter'
|
|
elif defined_in.endswith('-base'):
|
|
# Implicit type created for a flat union's dict 'base'
|
|
role = 'base ' + role
|
|
else:
|
|
# Implicit type created for a simple union's branch
|
|
assert defined_in.endswith('-wrapper')
|
|
# Unreachable and not implemented
|
|
assert False
|
|
elif defined_in.endswith('Kind'):
|
|
# See QAPISchema._make_implicit_enum_type()
|
|
# Implicit enum created for simple union's branches
|
|
assert role == 'value'
|
|
role = 'branch'
|
|
elif defined_in != info.defn_name:
|
|
return "%s '%s' of type '%s'" % (role, self.name, defined_in)
|
|
return "%s '%s'" % (role, self.name)
|
|
|
|
|
|
class QAPISchemaEnumMember(QAPISchemaMember):
|
|
role = 'value'
|
|
|
|
|
|
class QAPISchemaFeature(QAPISchemaMember):
|
|
role = 'feature'
|
|
|
|
|
|
class QAPISchemaObjectTypeMember(QAPISchemaMember):
|
|
def __init__(self, name, info, typ, optional, ifcond=None, features=None):
|
|
super().__init__(name, info, ifcond)
|
|
assert isinstance(typ, str)
|
|
assert isinstance(optional, bool)
|
|
for f in features or []:
|
|
assert isinstance(f, QAPISchemaFeature)
|
|
f.set_defined_in(name)
|
|
self._type_name = typ
|
|
self.type = None
|
|
self.optional = optional
|
|
self.features = features or []
|
|
|
|
def check(self, schema):
|
|
assert self.defined_in
|
|
self.type = schema.resolve_type(self._type_name, self.info,
|
|
self.describe)
|
|
seen = {}
|
|
for f in self.features:
|
|
f.check_clash(self.info, seen)
|
|
|
|
def connect_doc(self, doc):
|
|
super().connect_doc(doc)
|
|
if doc:
|
|
for f in self.features:
|
|
doc.connect_feature(f)
|
|
|
|
|
|
class QAPISchemaVariant(QAPISchemaObjectTypeMember):
|
|
role = 'branch'
|
|
|
|
def __init__(self, name, info, typ, ifcond=None):
|
|
super().__init__(name, info, typ, False, ifcond)
|
|
|
|
|
|
class QAPISchemaCommand(QAPISchemaEntity):
|
|
meta = 'command'
|
|
|
|
def __init__(self, name, info, doc, ifcond, features,
|
|
arg_type, ret_type,
|
|
gen, success_response, boxed, allow_oob, allow_preconfig,
|
|
coroutine):
|
|
super().__init__(name, info, doc, ifcond, features)
|
|
assert not arg_type or isinstance(arg_type, str)
|
|
assert not ret_type or isinstance(ret_type, str)
|
|
self._arg_type_name = arg_type
|
|
self.arg_type = None
|
|
self._ret_type_name = ret_type
|
|
self.ret_type = None
|
|
self.gen = gen
|
|
self.success_response = success_response
|
|
self.boxed = boxed
|
|
self.allow_oob = allow_oob
|
|
self.allow_preconfig = allow_preconfig
|
|
self.coroutine = coroutine
|
|
|
|
def check(self, schema):
|
|
super().check(schema)
|
|
if self._arg_type_name:
|
|
self.arg_type = schema.resolve_type(
|
|
self._arg_type_name, self.info, "command's 'data'")
|
|
if not isinstance(self.arg_type, QAPISchemaObjectType):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"command's 'data' cannot take %s"
|
|
% self.arg_type.describe())
|
|
if self.arg_type.variants and not self.boxed:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"command's 'data' can take %s only with 'boxed': true"
|
|
% self.arg_type.describe())
|
|
if self._ret_type_name:
|
|
self.ret_type = schema.resolve_type(
|
|
self._ret_type_name, self.info, "command's 'returns'")
|
|
if self.name not in self.info.pragma.command_returns_exceptions:
|
|
typ = self.ret_type
|
|
if isinstance(typ, QAPISchemaArrayType):
|
|
typ = self.ret_type.element_type
|
|
assert typ
|
|
if not isinstance(typ, QAPISchemaObjectType):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"command's 'returns' cannot take %s"
|
|
% self.ret_type.describe())
|
|
|
|
def connect_doc(self, doc=None):
|
|
super().connect_doc(doc)
|
|
doc = doc or self.doc
|
|
if doc:
|
|
if self.arg_type and self.arg_type.is_implicit():
|
|
self.arg_type.connect_doc(doc)
|
|
|
|
def visit(self, visitor):
|
|
super().visit(visitor)
|
|
visitor.visit_command(
|
|
self.name, self.info, self.ifcond, self.features,
|
|
self.arg_type, self.ret_type, self.gen, self.success_response,
|
|
self.boxed, self.allow_oob, self.allow_preconfig,
|
|
self.coroutine)
|
|
|
|
|
|
class QAPISchemaEvent(QAPISchemaEntity):
|
|
meta = 'event'
|
|
|
|
def __init__(self, name, info, doc, ifcond, features, arg_type, boxed):
|
|
super().__init__(name, info, doc, ifcond, features)
|
|
assert not arg_type or isinstance(arg_type, str)
|
|
self._arg_type_name = arg_type
|
|
self.arg_type = None
|
|
self.boxed = boxed
|
|
|
|
def check(self, schema):
|
|
super().check(schema)
|
|
if self._arg_type_name:
|
|
self.arg_type = schema.resolve_type(
|
|
self._arg_type_name, self.info, "event's 'data'")
|
|
if not isinstance(self.arg_type, QAPISchemaObjectType):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"event's 'data' cannot take %s"
|
|
% self.arg_type.describe())
|
|
if self.arg_type.variants and not self.boxed:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"event's 'data' can take %s only with 'boxed': true"
|
|
% self.arg_type.describe())
|
|
|
|
def connect_doc(self, doc=None):
|
|
super().connect_doc(doc)
|
|
doc = doc or self.doc
|
|
if doc:
|
|
if self.arg_type and self.arg_type.is_implicit():
|
|
self.arg_type.connect_doc(doc)
|
|
|
|
def visit(self, visitor):
|
|
super().visit(visitor)
|
|
visitor.visit_event(
|
|
self.name, self.info, self.ifcond, self.features,
|
|
self.arg_type, self.boxed)
|
|
|
|
|
|
class QAPISchema:
|
|
def __init__(self, fname):
|
|
self.fname = fname
|
|
parser = QAPISchemaParser(fname)
|
|
exprs = check_exprs(parser.exprs)
|
|
self.docs = parser.docs
|
|
self._entity_list = []
|
|
self._entity_dict = {}
|
|
self._module_dict = OrderedDict()
|
|
self._schema_dir = os.path.dirname(fname)
|
|
self._make_module(QAPISchemaModule.BUILTIN_MODULE_NAME)
|
|
self._make_module(fname)
|
|
self._predefining = True
|
|
self._def_predefineds()
|
|
self._predefining = False
|
|
self._def_exprs(exprs)
|
|
self.check()
|
|
|
|
def _def_entity(self, ent):
|
|
# Only the predefined types are allowed to not have info
|
|
assert ent.info or self._predefining
|
|
self._entity_list.append(ent)
|
|
if ent.name is None:
|
|
return
|
|
# TODO reject names that differ only in '_' vs. '.' vs. '-',
|
|
# because they're liable to clash in generated C.
|
|
other_ent = self._entity_dict.get(ent.name)
|
|
if other_ent:
|
|
if other_ent.info:
|
|
where = QAPISourceError(other_ent.info, "previous definition")
|
|
raise QAPISemError(
|
|
ent.info,
|
|
"'%s' is already defined\n%s" % (ent.name, where))
|
|
raise QAPISemError(
|
|
ent.info, "%s is already defined" % other_ent.describe())
|
|
self._entity_dict[ent.name] = ent
|
|
|
|
def lookup_entity(self, name, typ=None):
|
|
ent = self._entity_dict.get(name)
|
|
if typ and not isinstance(ent, typ):
|
|
return None
|
|
return ent
|
|
|
|
def lookup_type(self, name):
|
|
return self.lookup_entity(name, QAPISchemaType)
|
|
|
|
def resolve_type(self, name, info, what):
|
|
typ = self.lookup_type(name)
|
|
if not typ:
|
|
if callable(what):
|
|
what = what(info)
|
|
raise QAPISemError(
|
|
info, "%s uses unknown type '%s'" % (what, name))
|
|
return typ
|
|
|
|
def _module_name(self, fname: str) -> str:
|
|
if QAPISchemaModule.is_system_module(fname):
|
|
return fname
|
|
return os.path.relpath(fname, self._schema_dir)
|
|
|
|
def _make_module(self, fname):
|
|
name = self._module_name(fname)
|
|
if name not in self._module_dict:
|
|
self._module_dict[name] = QAPISchemaModule(name)
|
|
return self._module_dict[name]
|
|
|
|
def module_by_fname(self, fname):
|
|
name = self._module_name(fname)
|
|
return self._module_dict[name]
|
|
|
|
def _def_include(self, expr, info, doc):
|
|
include = expr['include']
|
|
assert doc is None
|
|
self._def_entity(QAPISchemaInclude(self._make_module(include), info))
|
|
|
|
def _def_builtin_type(self, name, json_type, c_type):
|
|
self._def_entity(QAPISchemaBuiltinType(name, json_type, c_type))
|
|
# Instantiating only the arrays that are actually used would
|
|
# be nice, but we can't as long as their generated code
|
|
# (qapi-builtin-types.[ch]) may be shared by some other
|
|
# schema.
|
|
self._make_array_type(name, None)
|
|
|
|
def _def_predefineds(self):
|
|
for t in [('str', 'string', 'char' + POINTER_SUFFIX),
|
|
('number', 'number', 'double'),
|
|
('int', 'int', 'int64_t'),
|
|
('int8', 'int', 'int8_t'),
|
|
('int16', 'int', 'int16_t'),
|
|
('int32', 'int', 'int32_t'),
|
|
('int64', 'int', 'int64_t'),
|
|
('uint8', 'int', 'uint8_t'),
|
|
('uint16', 'int', 'uint16_t'),
|
|
('uint32', 'int', 'uint32_t'),
|
|
('uint64', 'int', 'uint64_t'),
|
|
('size', 'int', 'uint64_t'),
|
|
('bool', 'boolean', 'bool'),
|
|
('any', 'value', 'QObject' + POINTER_SUFFIX),
|
|
('null', 'null', 'QNull' + POINTER_SUFFIX)]:
|
|
self._def_builtin_type(*t)
|
|
self.the_empty_object_type = QAPISchemaObjectType(
|
|
'q_empty', None, None, None, None, None, [], None)
|
|
self._def_entity(self.the_empty_object_type)
|
|
|
|
qtypes = ['none', 'qnull', 'qnum', 'qstring', 'qdict', 'qlist',
|
|
'qbool']
|
|
qtype_values = self._make_enum_members(
|
|
[{'name': n} for n in qtypes], None)
|
|
|
|
self._def_entity(QAPISchemaEnumType('QType', None, None, None, None,
|
|
qtype_values, 'QTYPE'))
|
|
|
|
def _make_features(self, features, info):
|
|
if features is None:
|
|
return []
|
|
return [QAPISchemaFeature(f['name'], info, f.get('if'))
|
|
for f in features]
|
|
|
|
def _make_enum_members(self, values, info):
|
|
return [QAPISchemaEnumMember(v['name'], info, v.get('if'))
|
|
for v in values]
|
|
|
|
def _make_implicit_enum_type(self, name, info, ifcond, values):
|
|
# See also QAPISchemaObjectTypeMember.describe()
|
|
name = name + 'Kind' # reserved by check_defn_name_str()
|
|
self._def_entity(QAPISchemaEnumType(
|
|
name, info, None, ifcond, None,
|
|
self._make_enum_members(values, info),
|
|
None))
|
|
return name
|
|
|
|
def _make_array_type(self, element_type, info):
|
|
name = element_type + 'List' # reserved by check_defn_name_str()
|
|
if not self.lookup_type(name):
|
|
self._def_entity(QAPISchemaArrayType(name, info, element_type))
|
|
return name
|
|
|
|
def _make_implicit_object_type(self, name, info, ifcond, role, members):
|
|
if not members:
|
|
return None
|
|
# See also QAPISchemaObjectTypeMember.describe()
|
|
name = 'q_obj_%s-%s' % (name, role)
|
|
typ = self.lookup_entity(name, QAPISchemaObjectType)
|
|
if typ:
|
|
# The implicit object type has multiple users. This can
|
|
# happen only for simple unions' implicit wrapper types.
|
|
# Its ifcond should be the disjunction of its user's
|
|
# ifconds. Not implemented. Instead, we always pass the
|
|
# wrapped type's ifcond, which is trivially the same for all
|
|
# users. It's also necessary for the wrapper to compile.
|
|
# But it's not tight: the disjunction need not imply it. We
|
|
# may end up compiling useless wrapper types.
|
|
# TODO kill simple unions or implement the disjunction
|
|
|
|
# pylint: disable=protected-access
|
|
assert (ifcond or []) == typ._ifcond
|
|
else:
|
|
self._def_entity(QAPISchemaObjectType(
|
|
name, info, None, ifcond, None, None, members, None))
|
|
return name
|
|
|
|
def _def_enum_type(self, expr, info, doc):
|
|
name = expr['enum']
|
|
data = expr['data']
|
|
prefix = expr.get('prefix')
|
|
ifcond = expr.get('if')
|
|
features = self._make_features(expr.get('features'), info)
|
|
self._def_entity(QAPISchemaEnumType(
|
|
name, info, doc, ifcond, features,
|
|
self._make_enum_members(data, info), prefix))
|
|
|
|
def _make_member(self, name, typ, ifcond, features, info):
|
|
optional = False
|
|
if name.startswith('*'):
|
|
name = name[1:]
|
|
optional = True
|
|
if isinstance(typ, list):
|
|
assert len(typ) == 1
|
|
typ = self._make_array_type(typ[0], info)
|
|
return QAPISchemaObjectTypeMember(name, info, typ, optional, ifcond,
|
|
self._make_features(features, info))
|
|
|
|
def _make_members(self, data, info):
|
|
return [self._make_member(key, value['type'], value.get('if'),
|
|
value.get('features'), info)
|
|
for (key, value) in data.items()]
|
|
|
|
def _def_struct_type(self, expr, info, doc):
|
|
name = expr['struct']
|
|
base = expr.get('base')
|
|
data = expr['data']
|
|
ifcond = expr.get('if')
|
|
features = self._make_features(expr.get('features'), info)
|
|
self._def_entity(QAPISchemaObjectType(
|
|
name, info, doc, ifcond, features, base,
|
|
self._make_members(data, info),
|
|
None))
|
|
|
|
def _make_variant(self, case, typ, ifcond, info):
|
|
return QAPISchemaVariant(case, info, typ, ifcond)
|
|
|
|
def _make_simple_variant(self, case, typ, ifcond, info):
|
|
if isinstance(typ, list):
|
|
assert len(typ) == 1
|
|
typ = self._make_array_type(typ[0], info)
|
|
typ = self._make_implicit_object_type(
|
|
typ, info, self.lookup_type(typ),
|
|
'wrapper', [self._make_member('data', typ, None, None, info)])
|
|
return QAPISchemaVariant(case, info, typ, ifcond)
|
|
|
|
def _def_union_type(self, expr, info, doc):
|
|
name = expr['union']
|
|
data = expr['data']
|
|
base = expr.get('base')
|
|
ifcond = expr.get('if')
|
|
features = self._make_features(expr.get('features'), info)
|
|
tag_name = expr.get('discriminator')
|
|
tag_member = None
|
|
if isinstance(base, dict):
|
|
base = self._make_implicit_object_type(
|
|
name, info, ifcond,
|
|
'base', self._make_members(base, info))
|
|
if tag_name:
|
|
variants = [self._make_variant(key, value['type'],
|
|
value.get('if'), info)
|
|
for (key, value) in data.items()]
|
|
members = []
|
|
else:
|
|
variants = [self._make_simple_variant(key, value['type'],
|
|
value.get('if'), info)
|
|
for (key, value) in data.items()]
|
|
enum = [{'name': v.name, 'if': v.ifcond} for v in variants]
|
|
typ = self._make_implicit_enum_type(name, info, ifcond, enum)
|
|
tag_member = QAPISchemaObjectTypeMember('type', info, typ, False)
|
|
members = [tag_member]
|
|
self._def_entity(
|
|
QAPISchemaObjectType(name, info, doc, ifcond, features,
|
|
base, members,
|
|
QAPISchemaVariants(
|
|
tag_name, info, tag_member, variants)))
|
|
|
|
def _def_alternate_type(self, expr, info, doc):
|
|
name = expr['alternate']
|
|
data = expr['data']
|
|
ifcond = expr.get('if')
|
|
features = self._make_features(expr.get('features'), info)
|
|
variants = [self._make_variant(key, value['type'], value.get('if'),
|
|
info)
|
|
for (key, value) in data.items()]
|
|
tag_member = QAPISchemaObjectTypeMember('type', info, 'QType', False)
|
|
self._def_entity(
|
|
QAPISchemaAlternateType(name, info, doc, ifcond, features,
|
|
QAPISchemaVariants(
|
|
None, info, tag_member, variants)))
|
|
|
|
def _def_command(self, expr, info, doc):
|
|
name = expr['command']
|
|
data = expr.get('data')
|
|
rets = expr.get('returns')
|
|
gen = expr.get('gen', True)
|
|
success_response = expr.get('success-response', True)
|
|
boxed = expr.get('boxed', False)
|
|
allow_oob = expr.get('allow-oob', False)
|
|
allow_preconfig = expr.get('allow-preconfig', False)
|
|
coroutine = expr.get('coroutine', False)
|
|
ifcond = expr.get('if')
|
|
features = self._make_features(expr.get('features'), info)
|
|
if isinstance(data, OrderedDict):
|
|
data = self._make_implicit_object_type(
|
|
name, info, ifcond,
|
|
'arg', self._make_members(data, info))
|
|
if isinstance(rets, list):
|
|
assert len(rets) == 1
|
|
rets = self._make_array_type(rets[0], info)
|
|
self._def_entity(QAPISchemaCommand(name, info, doc, ifcond, features,
|
|
data, rets,
|
|
gen, success_response,
|
|
boxed, allow_oob, allow_preconfig,
|
|
coroutine))
|
|
|
|
def _def_event(self, expr, info, doc):
|
|
name = expr['event']
|
|
data = expr.get('data')
|
|
boxed = expr.get('boxed', False)
|
|
ifcond = expr.get('if')
|
|
features = self._make_features(expr.get('features'), info)
|
|
if isinstance(data, OrderedDict):
|
|
data = self._make_implicit_object_type(
|
|
name, info, ifcond,
|
|
'arg', self._make_members(data, info))
|
|
self._def_entity(QAPISchemaEvent(name, info, doc, ifcond, features,
|
|
data, boxed))
|
|
|
|
def _def_exprs(self, exprs):
|
|
for expr_elem in exprs:
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
doc = expr_elem.get('doc')
|
|
if 'enum' in expr:
|
|
self._def_enum_type(expr, info, doc)
|
|
elif 'struct' in expr:
|
|
self._def_struct_type(expr, info, doc)
|
|
elif 'union' in expr:
|
|
self._def_union_type(expr, info, doc)
|
|
elif 'alternate' in expr:
|
|
self._def_alternate_type(expr, info, doc)
|
|
elif 'command' in expr:
|
|
self._def_command(expr, info, doc)
|
|
elif 'event' in expr:
|
|
self._def_event(expr, info, doc)
|
|
elif 'include' in expr:
|
|
self._def_include(expr, info, doc)
|
|
else:
|
|
assert False
|
|
|
|
def check(self):
|
|
for ent in self._entity_list:
|
|
ent.check(self)
|
|
ent.connect_doc()
|
|
ent.check_doc()
|
|
for ent in self._entity_list:
|
|
ent.set_module(self)
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_begin(self)
|
|
for mod in self._module_dict.values():
|
|
mod.visit(visitor)
|
|
visitor.visit_end()
|