1044 lines
38 KiB
Python
1044 lines
38 KiB
Python
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# -*- 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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import os
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import re
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from collections import OrderedDict
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from qapi.common import c_name, pointer_suffix
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from qapi.error import QAPIError, QAPIParseError, QAPISemError
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from qapi.expr import check_exprs
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from qapi.parser import QAPISchemaParser
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class QAPISchemaEntity(object):
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meta = None
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def __init__(self, name, info, doc, ifcond=None):
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assert name is None or isinstance(name, str)
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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._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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if self.info:
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self._module = os.path.relpath(self.info.fname,
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os.path.dirname(schema.fname))
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self._checked = True
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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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@property
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def module(self):
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assert self._checked
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return self._module
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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(object):
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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, fname):
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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, fname, 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, 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, base, members, variants,
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features):
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pass
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def visit_object_type_flat(self, name, info, ifcond, members, variants,
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features):
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pass
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def visit_alternate_type(self, name, info, ifcond, variants):
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pass
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def visit_command(self, name, info, ifcond, arg_type, ret_type, gen,
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success_response, boxed, allow_oob, allow_preconfig):
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pass
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def visit_event(self, name, info, ifcond, arg_type, boxed):
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pass
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class QAPISchemaInclude(QAPISchemaEntity):
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def __init__(self, fname, info):
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QAPISchemaEntity.__init__(self, None, info, None)
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self.fname = fname
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def visit(self, visitor):
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QAPISchemaEntity.visit(self, visitor)
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visitor.visit_include(self.fname, 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 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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QAPISchemaType.__init__(self, 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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QAPISchemaType.visit(self, 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, members, prefix):
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QAPISchemaType.__init__(self, name, info, doc, ifcond)
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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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QAPISchemaType.check(self, 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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if self.doc:
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self.doc.connect_member(m)
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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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QAPISchemaType.visit(self, visitor)
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visitor.visit_enum_type(self.name, self.info, self.ifcond,
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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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QAPISchemaType.__init__(self, name, info, None, 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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QAPISchemaType.check(self, 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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@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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@property
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def module(self):
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assert self._checked
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return self.element_type.module
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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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QAPISchemaType.visit(self, 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,
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base, local_members, variants, features):
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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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QAPISchemaType.__init__(self, name, info, doc, ifcond)
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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, QAPISchemaObjectTypeVariants)
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variants.set_defined_in(name)
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for f in features:
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assert isinstance(f, QAPISchemaFeature)
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f.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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self.features = features
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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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QAPISchemaType.check(self, 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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if self.doc:
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self.doc.connect_member(m)
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members = seen.values()
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|
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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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# Features are in a name space separate from members
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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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|
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if self.doc:
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self.doc.check()
|
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|
||
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self.members = members # mark completed
|
||
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|
||
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# Check that the members of this type do not cause duplicate JSON members,
|
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|
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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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|
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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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|
||
|
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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):
|
||
|
|
# Simple union wrapper type inherits from wrapped type;
|
||
|
|
# see _make_implicit_object_type()
|
||
|
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return self._ifcond.ifcond
|
||
|
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return self._ifcond
|
||
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|
||
|
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def is_implicit(self):
|
||
|
|
# See QAPISchema._make_implicit_object_type(), as well as
|
||
|
|
# _def_predefineds()
|
||
|
|
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):
|
||
|
|
assert self.name != 'q_empty'
|
||
|
|
return QAPISchemaType.c_name(self)
|
||
|
|
|
||
|
|
def c_type(self):
|
||
|
|
assert not self.is_implicit()
|
||
|
|
return c_name(self.name) + pointer_suffix
|
||
|
|
|
||
|
|
def c_unboxed_type(self):
|
||
|
|
return c_name(self.name)
|
||
|
|
|
||
|
|
def json_type(self):
|
||
|
|
return 'object'
|
||
|
|
|
||
|
|
def visit(self, visitor):
|
||
|
|
QAPISchemaType.visit(self, visitor)
|
||
|
|
visitor.visit_object_type(self.name, self.info, self.ifcond,
|
||
|
|
self.base, self.local_members, self.variants,
|
||
|
|
self.features)
|
||
|
|
visitor.visit_object_type_flat(self.name, self.info, self.ifcond,
|
||
|
|
self.members, self.variants,
|
||
|
|
self.features)
|
||
|
|
|
||
|
|
|
||
|
|
class QAPISchemaMember(object):
|
||
|
|
""" 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 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):
|
||
|
|
QAPISchemaMember.__init__(self, name, info, ifcond)
|
||
|
|
assert isinstance(typ, str)
|
||
|
|
assert isinstance(optional, bool)
|
||
|
|
self._type_name = typ
|
||
|
|
self.type = None
|
||
|
|
self.optional = optional
|
||
|
|
|
||
|
|
def check(self, schema):
|
||
|
|
assert self.defined_in
|
||
|
|
self.type = schema.resolve_type(self._type_name, self.info,
|
||
|
|
self.describe)
|
||
|
|
|
||
|
|
|
||
|
|
class QAPISchemaObjectTypeVariants(object):
|
||
|
|
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, QAPISchemaObjectTypeVariant)
|
||
|
|
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 = set([v.name for v in self.variants])
|
||
|
|
for m in self.tag_member.type.members:
|
||
|
|
if m.name not in cases:
|
||
|
|
v = QAPISchemaObjectTypeVariant(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 QAPISchemaObjectTypeVariant(QAPISchemaObjectTypeMember):
|
||
|
|
role = 'branch'
|
||
|
|
|
||
|
|
def __init__(self, name, info, typ, ifcond=None):
|
||
|
|
QAPISchemaObjectTypeMember.__init__(self, name, info, typ,
|
||
|
|
False, ifcond)
|
||
|
|
|
||
|
|
|
||
|
|
class QAPISchemaAlternateType(QAPISchemaType):
|
||
|
|
meta = 'alternate'
|
||
|
|
|
||
|
|
def __init__(self, name, info, doc, ifcond, variants):
|
||
|
|
QAPISchemaType.__init__(self, name, info, doc, ifcond)
|
||
|
|
assert isinstance(variants, QAPISchemaObjectTypeVariants)
|
||
|
|
assert variants.tag_member
|
||
|
|
variants.set_defined_in(name)
|
||
|
|
variants.tag_member.set_defined_in(self.name)
|
||
|
|
self.variants = variants
|
||
|
|
|
||
|
|
def check(self, schema):
|
||
|
|
QAPISchemaType.check(self, schema)
|
||
|
|
self.variants.tag_member.check(schema)
|
||
|
|
# Not calling self.variants.check_clash(), because there's nothing
|
||
|
|
# to clash with
|
||
|
|
self.variants.check(schema, {})
|
||
|
|
# Alternate branch names have no relation to the tag enum values;
|
||
|
|
# so we have to check for potential name collisions ourselves.
|
||
|
|
seen = {}
|
||
|
|
types_seen = {}
|
||
|
|
for v in self.variants.variants:
|
||
|
|
v.check_clash(self.info, seen)
|
||
|
|
qtype = v.type.alternate_qtype()
|
||
|
|
if not qtype:
|
||
|
|
raise QAPISemError(
|
||
|
|
self.info,
|
||
|
|
"%s cannot use %s"
|
||
|
|
% (v.describe(self.info), v.type.describe()))
|
||
|
|
conflicting = set([qtype])
|
||
|
|
if qtype == 'QTYPE_QSTRING':
|
||
|
|
if isinstance(v.type, QAPISchemaEnumType):
|
||
|
|
for m in v.type.members:
|
||
|
|
if m.name in ['on', 'off']:
|
||
|
|
conflicting.add('QTYPE_QBOOL')
|
||
|
|
if re.match(r'[-+0-9.]', m.name):
|
||
|
|
# lazy, could be tightened
|
||
|
|
conflicting.add('QTYPE_QNUM')
|
||
|
|
else:
|
||
|
|
conflicting.add('QTYPE_QNUM')
|
||
|
|
conflicting.add('QTYPE_QBOOL')
|
||
|
|
for qt in conflicting:
|
||
|
|
if qt in types_seen:
|
||
|
|
raise QAPISemError(
|
||
|
|
self.info,
|
||
|
|
"%s can't be distinguished from '%s'"
|
||
|
|
% (v.describe(self.info), types_seen[qt]))
|
||
|
|
types_seen[qt] = v.name
|
||
|
|
if self.doc:
|
||
|
|
self.doc.connect_member(v)
|
||
|
|
if self.doc:
|
||
|
|
self.doc.check()
|
||
|
|
|
||
|
|
def c_type(self):
|
||
|
|
return c_name(self.name) + pointer_suffix
|
||
|
|
|
||
|
|
def json_type(self):
|
||
|
|
return 'value'
|
||
|
|
|
||
|
|
def visit(self, visitor):
|
||
|
|
QAPISchemaType.visit(self, visitor)
|
||
|
|
visitor.visit_alternate_type(self.name, self.info, self.ifcond,
|
||
|
|
self.variants)
|
||
|
|
|
||
|
|
|
||
|
|
class QAPISchemaCommand(QAPISchemaEntity):
|
||
|
|
meta = 'command'
|
||
|
|
|
||
|
|
def __init__(self, name, info, doc, ifcond, arg_type, ret_type,
|
||
|
|
gen, success_response, boxed, allow_oob, allow_preconfig):
|
||
|
|
QAPISchemaEntity.__init__(self, name, info, doc, ifcond)
|
||
|
|
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
|
||
|
|
|
||
|
|
def check(self, schema):
|
||
|
|
QAPISchemaEntity.check(self, 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.returns_whitelist:
|
||
|
|
if not (isinstance(self.ret_type, QAPISchemaObjectType)
|
||
|
|
or (isinstance(self.ret_type, QAPISchemaArrayType)
|
||
|
|
and isinstance(self.ret_type.element_type,
|
||
|
|
QAPISchemaObjectType))):
|
||
|
|
raise QAPISemError(
|
||
|
|
self.info,
|
||
|
|
"command's 'returns' cannot take %s"
|
||
|
|
% self.ret_type.describe())
|
||
|
|
|
||
|
|
def visit(self, visitor):
|
||
|
|
QAPISchemaEntity.visit(self, visitor)
|
||
|
|
visitor.visit_command(self.name, self.info, self.ifcond,
|
||
|
|
self.arg_type, self.ret_type,
|
||
|
|
self.gen, self.success_response,
|
||
|
|
self.boxed, self.allow_oob,
|
||
|
|
self.allow_preconfig)
|
||
|
|
|
||
|
|
|
||
|
|
class QAPISchemaEvent(QAPISchemaEntity):
|
||
|
|
meta = 'event'
|
||
|
|
|
||
|
|
def __init__(self, name, info, doc, ifcond, arg_type, boxed):
|
||
|
|
QAPISchemaEntity.__init__(self, name, info, doc, ifcond)
|
||
|
|
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):
|
||
|
|
QAPISchemaEntity.check(self, 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 visit(self, visitor):
|
||
|
|
QAPISchemaEntity.visit(self, visitor)
|
||
|
|
visitor.visit_event(self.name, self.info, self.ifcond,
|
||
|
|
self.arg_type, self.boxed)
|
||
|
|
|
||
|
|
|
||
|
|
class QAPISchema(object):
|
||
|
|
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._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 = QAPIError(other_ent.info, None, "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 _def_include(self, expr, info, doc):
|
||
|
|
include = expr['include']
|
||
|
|
assert doc is None
|
||
|
|
main_info = info
|
||
|
|
while main_info.parent:
|
||
|
|
main_info = main_info.parent
|
||
|
|
fname = os.path.relpath(include, os.path.dirname(main_info.fname))
|
||
|
|
self._def_entity(QAPISchemaInclude(fname, 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, [])
|
||
|
|
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,
|
||
|
|
qtype_values, 'QTYPE'))
|
||
|
|
|
||
|
|
def _make_features(self, features, info):
|
||
|
|
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, 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, doc, 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
|
||
|
|
assert (ifcond or []) == typ._ifcond # pylint: disable=protected-access
|
||
|
|
else:
|
||
|
|
self._def_entity(QAPISchemaObjectType(name, info, doc, ifcond,
|
||
|
|
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')
|
||
|
|
self._def_entity(QAPISchemaEnumType(
|
||
|
|
name, info, doc, ifcond,
|
||
|
|
self._make_enum_members(data, info), prefix))
|
||
|
|
|
||
|
|
def _make_member(self, name, typ, ifcond, 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)
|
||
|
|
|
||
|
|
def _make_members(self, data, info):
|
||
|
|
return [self._make_member(key, value['type'], value.get('if'), 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 = expr.get('features', [])
|
||
|
|
self._def_entity(QAPISchemaObjectType(
|
||
|
|
name, info, doc, ifcond, base,
|
||
|
|
self._make_members(data, info),
|
||
|
|
None,
|
||
|
|
self._make_features(features, info)))
|
||
|
|
|
||
|
|
def _make_variant(self, case, typ, ifcond, info):
|
||
|
|
return QAPISchemaObjectTypeVariant(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, None, self.lookup_type(typ),
|
||
|
|
'wrapper', [self._make_member('data', typ, None, info)])
|
||
|
|
return QAPISchemaObjectTypeVariant(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')
|
||
|
|
tag_name = expr.get('discriminator')
|
||
|
|
tag_member = None
|
||
|
|
if isinstance(base, dict):
|
||
|
|
base = self._make_implicit_object_type(
|
||
|
|
name, info, doc, 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, base, members,
|
||
|
|
QAPISchemaObjectTypeVariants(
|
||
|
|
tag_name, info, tag_member, variants),
|
||
|
|
[]))
|
||
|
|
|
||
|
|
def _def_alternate_type(self, expr, info, doc):
|
||
|
|
name = expr['alternate']
|
||
|
|
data = expr['data']
|
||
|
|
ifcond = expr.get('if')
|
||
|
|
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,
|
||
|
|
QAPISchemaObjectTypeVariants(
|
||
|
|
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)
|
||
|
|
ifcond = expr.get('if')
|
||
|
|
if isinstance(data, OrderedDict):
|
||
|
|
data = self._make_implicit_object_type(
|
||
|
|
name, info, doc, 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, data, rets,
|
||
|
|
gen, success_response,
|
||
|
|
boxed, allow_oob, allow_preconfig))
|
||
|
|
|
||
|
|
def _def_event(self, expr, info, doc):
|
||
|
|
name = expr['event']
|
||
|
|
data = expr.get('data')
|
||
|
|
boxed = expr.get('boxed', False)
|
||
|
|
ifcond = expr.get('if')
|
||
|
|
if isinstance(data, OrderedDict):
|
||
|
|
data = self._make_implicit_object_type(
|
||
|
|
name, info, doc, ifcond, 'arg', self._make_members(data, info))
|
||
|
|
self._def_entity(QAPISchemaEvent(name, info, doc, ifcond, 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)
|
||
|
|
|
||
|
|
def visit(self, visitor):
|
||
|
|
visitor.visit_begin(self)
|
||
|
|
module = None
|
||
|
|
visitor.visit_module(module)
|
||
|
|
for entity in self._entity_list:
|
||
|
|
if visitor.visit_needed(entity):
|
||
|
|
if entity.module != module:
|
||
|
|
module = entity.module
|
||
|
|
visitor.visit_module(module)
|
||
|
|
entity.visit(visitor)
|
||
|
|
visitor.visit_end()
|