# -*- coding: utf-8 -*- # # QAPI schema internal representation # # Copyright (c) 2015-2019 Red Hat Inc. # # Authors: # Markus Armbruster # Eric Blake # Marc-André Lureau # # This work is licensed under the terms of the GNU GPL, version 2. # See the COPYING file in the top-level directory. # TODO catching name collisions in generated code would be nice from collections import OrderedDict import os import re from typing import Optional from .common import POINTER_SUFFIX, c_name from .error import QAPISemError, QAPISourceError from .expr import check_exprs from .parser import QAPISchemaParser class QAPISchemaEntity: meta: Optional[str] = None def __init__(self, name: str, info, doc, ifcond=None, features=None): assert name is None or isinstance(name, str) for f in features or []: assert isinstance(f, QAPISchemaFeature) f.set_defined_in(name) self.name = name self._module = None # For explicitly defined entities, info points to the (explicit) # definition. For builtins (and their arrays), info is None. # For implicitly defined entities, info points to a place that # triggered the implicit definition (there may be more than one # such place). self.info = info self.doc = doc self._ifcond = ifcond or [] self.features = features or [] self._checked = False def c_name(self): return c_name(self.name) def check(self, schema): assert not self._checked seen = {} for f in self.features: f.check_clash(self.info, seen) self._checked = True def connect_doc(self, doc=None): doc = doc or self.doc if doc: for f in self.features: doc.connect_feature(f) def check_doc(self): if self.doc: self.doc.check() def _set_module(self, schema, info): assert self._checked fname = info.fname if info else QAPISchemaModule.BUILTIN_MODULE_NAME self._module = schema.module_by_fname(fname) self._module.add_entity(self) def set_module(self, schema): self._set_module(schema, self.info) @property def ifcond(self): assert self._checked return self._ifcond def is_implicit(self): return not self.info def visit(self, visitor): assert self._checked def describe(self): assert self.meta return "%s '%s'" % (self.meta, self.name) class QAPISchemaVisitor: def visit_begin(self, schema): pass def visit_end(self): pass def visit_module(self, name): pass def visit_needed(self, entity): # Default to visiting everything return True def visit_include(self, name, info): pass def visit_builtin_type(self, name, info, json_type): pass def visit_enum_type(self, name, info, ifcond, features, members, prefix): pass def visit_array_type(self, name, info, ifcond, element_type): pass def visit_object_type(self, name, info, ifcond, features, base, members, variants): pass def visit_object_type_flat(self, name, info, ifcond, features, members, variants): pass def visit_alternate_type(self, name, info, ifcond, features, variants): pass def visit_command(self, name, info, ifcond, features, arg_type, ret_type, gen, success_response, boxed, allow_oob, allow_preconfig, coroutine): pass def visit_event(self, name, info, ifcond, features, arg_type, boxed): pass class QAPISchemaModule: BUILTIN_MODULE_NAME = './builtin' def __init__(self, name): self.name = name self._entity_list = [] @staticmethod def is_system_module(name: str) -> bool: """ System modules are internally defined modules. Their names start with the "./" prefix. """ return name.startswith('./') @classmethod def is_user_module(cls, name: str) -> bool: """ User modules are those defined by the user in qapi JSON files. They do not start with the "./" prefix. """ return not cls.is_system_module(name) @classmethod def is_builtin_module(cls, name: str) -> bool: """ The built-in module is a single System module for the built-in types. It is always "./builtin". """ return name == cls.BUILTIN_MODULE_NAME def add_entity(self, ent): self._entity_list.append(ent) def visit(self, visitor): visitor.visit_module(self.name) for entity in self._entity_list: if visitor.visit_needed(entity): entity.visit(visitor) class QAPISchemaInclude(QAPISchemaEntity): def __init__(self, sub_module, info): super().__init__(None, info, None) self._sub_module = sub_module def visit(self, visitor): super().visit(visitor) visitor.visit_include(self._sub_module.name, self.info) class QAPISchemaType(QAPISchemaEntity): # Return the C type for common use. # For the types we commonly box, this is a pointer type. def c_type(self): pass # Return the C type to be used in a parameter list. def c_param_type(self): return self.c_type() # Return the C type to be used where we suppress boxing. def c_unboxed_type(self): return self.c_type() def json_type(self): pass def alternate_qtype(self): json2qtype = { 'null': 'QTYPE_QNULL', 'string': 'QTYPE_QSTRING', 'number': 'QTYPE_QNUM', 'int': 'QTYPE_QNUM', 'boolean': 'QTYPE_QBOOL', 'object': 'QTYPE_QDICT' } return json2qtype.get(self.json_type()) def doc_type(self): if self.is_implicit(): return None return self.name def check(self, schema): QAPISchemaEntity.check(self, schema) if 'deprecated' in [f.name for f in self.features]: raise QAPISemError( self.info, "feature 'deprecated' is not supported for types") def describe(self): assert self.meta return "%s type '%s'" % (self.meta, self.name) class QAPISchemaBuiltinType(QAPISchemaType): meta = 'built-in' def __init__(self, name, json_type, c_type): super().__init__(name, None, None) assert not c_type or isinstance(c_type, str) assert json_type in ('string', 'number', 'int', 'boolean', 'null', 'value') self._json_type_name = json_type self._c_type_name = c_type def c_name(self): return self.name def c_type(self): return self._c_type_name def c_param_type(self): if self.name == 'str': return 'const ' + self._c_type_name return self._c_type_name def json_type(self): return self._json_type_name def doc_type(self): return self.json_type() def visit(self, visitor): super().visit(visitor) visitor.visit_builtin_type(self.name, self.info, self.json_type()) class QAPISchemaEnumType(QAPISchemaType): meta = 'enum' def __init__(self, name, info, doc, ifcond, features, members, prefix): super().__init__(name, info, doc, ifcond, features) for m in members: assert isinstance(m, QAPISchemaEnumMember) m.set_defined_in(name) assert prefix is None or isinstance(prefix, str) self.members = members self.prefix = prefix def check(self, schema): super().check(schema) seen = {} for m in self.members: m.check_clash(self.info, seen) def connect_doc(self, doc=None): super().connect_doc(doc) doc = doc or self.doc for m in self.members: m.connect_doc(doc) def is_implicit(self): # See QAPISchema._make_implicit_enum_type() and ._def_predefineds() return self.name.endswith('Kind') or self.name == 'QType' def c_type(self): return c_name(self.name) def member_names(self): return [m.name for m in self.members] def json_type(self): return 'string' def visit(self, visitor): super().visit(visitor) visitor.visit_enum_type( self.name, self.info, self.ifcond, self.features, self.members, self.prefix) class QAPISchemaArrayType(QAPISchemaType): meta = 'array' def __init__(self, name, info, element_type): super().__init__(name, info, None) assert isinstance(element_type, str) self._element_type_name = element_type self.element_type = None def check(self, schema): super().check(schema) self.element_type = schema.resolve_type( self._element_type_name, self.info, self.info and self.info.defn_meta) assert not isinstance(self.element_type, QAPISchemaArrayType) def set_module(self, schema): self._set_module(schema, self.element_type.info) @property def ifcond(self): assert self._checked return self.element_type.ifcond def is_implicit(self): return True def c_type(self): return c_name(self.name) + POINTER_SUFFIX def json_type(self): return 'array' def doc_type(self): elt_doc_type = self.element_type.doc_type() if not elt_doc_type: return None return 'array of ' + elt_doc_type def visit(self, visitor): super().visit(visitor) visitor.visit_array_type(self.name, self.info, self.ifcond, self.element_type) def describe(self): assert self.meta return "%s type ['%s']" % (self.meta, self._element_type_name) class QAPISchemaObjectType(QAPISchemaType): def __init__(self, name, info, doc, ifcond, features, base, local_members, variants): # struct has local_members, optional base, and no variants # flat union has base, variants, and no local_members # simple union has local_members, variants, and no base super().__init__(name, info, doc, ifcond, features) self.meta = 'union' if variants else 'struct' assert base is None or isinstance(base, str) for m in local_members: assert isinstance(m, QAPISchemaObjectTypeMember) m.set_defined_in(name) if variants is not None: assert isinstance(variants, QAPISchemaVariants) variants.set_defined_in(name) self._base_name = base self.base = None self.local_members = local_members self.variants = variants self.members = None def check(self, schema): # This calls another type T's .check() exactly when the C # struct emitted by gen_object() contains that T's C struct # (pointers don't count). if self.members is not None: # A previous .check() completed: nothing to do return if self._checked: # Recursed: C struct contains itself raise QAPISemError(self.info, "object %s contains itself" % self.name) super().check(schema) assert self._checked and self.members is None seen = OrderedDict() if self._base_name: self.base = schema.resolve_type(self._base_name, self.info, "'base'") if (not isinstance(self.base, QAPISchemaObjectType) or self.base.variants): raise QAPISemError( self.info, "'base' requires a struct type, %s isn't" % self.base.describe()) self.base.check(schema) self.base.check_clash(self.info, seen) for m in self.local_members: m.check(schema) m.check_clash(self.info, seen) members = seen.values() if self.variants: self.variants.check(schema, seen) self.variants.check_clash(self.info, seen) self.members = members # mark completed # Check that the members of this type do not cause duplicate JSON members, # and update seen to track the members seen so far. Report any errors # on behalf of info, which is not necessarily self.info def check_clash(self, info, seen): assert self._checked assert not self.variants # not implemented for m in self.members: m.check_clash(info, seen) def connect_doc(self, doc=None): super().connect_doc(doc) doc = doc or self.doc if self.base and self.base.is_implicit(): self.base.connect_doc(doc) for m in self.local_members: m.connect_doc(doc) @property def ifcond(self): assert self._checked if isinstance(self._ifcond, QAPISchemaType): # Simple union wrapper type inherits from wrapped type; # see _make_implicit_object_type() return self._ifcond.ifcond return self._ifcond def is_implicit(self): # See QAPISchema._make_implicit_object_type(), as well as # _def_predefineds() return self.name.startswith('q_') def is_empty(self): assert self.members is not None return not self.members and not self.variants def c_name(self): assert self.name != 'q_empty' return super().c_name() 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): super().visit(visitor) visitor.visit_object_type( self.name, self.info, self.ifcond, self.features, self.base, self.local_members, self.variants) visitor.visit_object_type_flat( self.name, self.info, self.ifcond, self.features, self.members, self.variants) class QAPISchemaAlternateType(QAPISchemaType): meta = 'alternate' def __init__(self, name, info, doc, ifcond, features, variants): super().__init__(name, info, doc, ifcond, features) assert isinstance(variants, QAPISchemaVariants) assert variants.tag_member variants.set_defined_in(name) variants.tag_member.set_defined_in(self.name) self.variants = variants def check(self, schema): super().check(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 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()