# -*- 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. # pylint: disable=too-many-lines # TODO catching name collisions in generated code would be nice from __future__ import annotations from abc import ABC, abstractmethod from collections import OrderedDict import os import re from typing import ( Any, Callable, Dict, List, Optional, Union, cast, ) from .common import ( POINTER_SUFFIX, c_name, cgen_ifcond, docgen_ifcond, gen_endif, gen_if, ) from .error import QAPIError, QAPISemError, QAPISourceError from .expr import check_exprs from .parser import QAPIDoc, QAPIExpression, QAPISchemaParser from .source import QAPISourceInfo class QAPISchemaIfCond: def __init__( self, ifcond: Optional[Union[str, Dict[str, object]]] = None, ) -> None: self.ifcond = ifcond def _cgen(self) -> str: return cgen_ifcond(self.ifcond) def gen_if(self) -> str: return gen_if(self._cgen()) def gen_endif(self) -> str: return gen_endif(self._cgen()) def docgen(self) -> str: return docgen_ifcond(self.ifcond) def is_present(self) -> bool: return bool(self.ifcond) class QAPISchemaEntity: """ A schema entity. This is either a directive, such as include, or a definition. The latter uses sub-class `QAPISchemaDefinition`. """ def __init__(self, info: Optional[QAPISourceInfo]): self._module: Optional[QAPISchemaModule] = 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._checked = False def __repr__(self) -> str: return "<%s at 0x%x>" % (type(self).__name__, id(self)) def check(self, schema: QAPISchema) -> None: # pylint: disable=unused-argument self._checked = True def connect_doc(self, doc: Optional[QAPIDoc] = None) -> None: pass def _set_module( self, schema: QAPISchema, info: Optional[QAPISourceInfo] ) -> None: 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: QAPISchema) -> None: self._set_module(schema, self.info) def visit(self, visitor: QAPISchemaVisitor) -> None: # pylint: disable=unused-argument assert self._checked class QAPISchemaDefinition(QAPISchemaEntity): meta: str def __init__( self, name: str, info: Optional[QAPISourceInfo], doc: Optional[QAPIDoc], ifcond: Optional[QAPISchemaIfCond] = None, features: Optional[List[QAPISchemaFeature]] = None, ): super().__init__(info) for f in features or []: f.set_defined_in(name) self.name = name self.doc = doc self._ifcond = ifcond or QAPISchemaIfCond() self.features = features or [] def __repr__(self) -> str: return "<%s:%s at 0x%x>" % (type(self).__name__, self.name, id(self)) def c_name(self) -> str: return c_name(self.name) def check(self, schema: QAPISchema) -> None: assert not self._checked super().check(schema) seen: Dict[str, QAPISchemaMember] = {} for f in self.features: f.check_clash(self.info, seen) def connect_doc(self, doc: Optional[QAPIDoc] = None) -> None: super().connect_doc(doc) doc = doc or self.doc if doc: for f in self.features: doc.connect_feature(f) @property def ifcond(self) -> QAPISchemaIfCond: assert self._checked return self._ifcond def is_implicit(self) -> bool: return not self.info def describe(self) -> str: return "%s '%s'" % (self.meta, self.name) class QAPISchemaVisitor: def visit_begin(self, schema: QAPISchema) -> None: pass def visit_end(self) -> None: pass def visit_module(self, name: str) -> None: pass def visit_needed(self, entity: QAPISchemaEntity) -> bool: # pylint: disable=unused-argument # Default to visiting everything return True def visit_include(self, name: str, info: Optional[QAPISourceInfo]) -> None: pass def visit_builtin_type( self, name: str, info: Optional[QAPISourceInfo], json_type: str ) -> None: pass def visit_enum_type( self, name: str, info: Optional[QAPISourceInfo], ifcond: QAPISchemaIfCond, features: List[QAPISchemaFeature], members: List[QAPISchemaEnumMember], prefix: Optional[str], ) -> None: pass def visit_array_type( self, name: str, info: Optional[QAPISourceInfo], ifcond: QAPISchemaIfCond, element_type: QAPISchemaType, ) -> None: pass def visit_object_type( self, name: str, info: Optional[QAPISourceInfo], ifcond: QAPISchemaIfCond, features: List[QAPISchemaFeature], base: Optional[QAPISchemaObjectType], members: List[QAPISchemaObjectTypeMember], branches: Optional[QAPISchemaBranches], ) -> None: pass def visit_object_type_flat( self, name: str, info: Optional[QAPISourceInfo], ifcond: QAPISchemaIfCond, features: List[QAPISchemaFeature], members: List[QAPISchemaObjectTypeMember], branches: Optional[QAPISchemaBranches], ) -> None: pass def visit_alternate_type( self, name: str, info: Optional[QAPISourceInfo], ifcond: QAPISchemaIfCond, features: List[QAPISchemaFeature], alternatives: QAPISchemaAlternatives, ) -> None: pass def visit_command( self, name: str, info: Optional[QAPISourceInfo], ifcond: QAPISchemaIfCond, features: List[QAPISchemaFeature], arg_type: Optional[QAPISchemaObjectType], ret_type: Optional[QAPISchemaType], gen: bool, success_response: bool, boxed: bool, allow_oob: bool, allow_preconfig: bool, coroutine: bool, ) -> None: pass def visit_event( self, name: str, info: Optional[QAPISourceInfo], ifcond: QAPISchemaIfCond, features: List[QAPISchemaFeature], arg_type: Optional[QAPISchemaObjectType], boxed: bool, ) -> None: pass class QAPISchemaModule: BUILTIN_MODULE_NAME = './builtin' def __init__(self, name: str): self.name = name self._entity_list: List[QAPISchemaEntity] = [] @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: QAPISchemaEntity) -> None: self._entity_list.append(ent) def visit(self, visitor: QAPISchemaVisitor) -> None: 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: QAPISchemaModule, info: QAPISourceInfo): super().__init__(info) self._sub_module = sub_module def visit(self, visitor: QAPISchemaVisitor) -> None: super().visit(visitor) visitor.visit_include(self._sub_module.name, self.info) class QAPISchemaType(QAPISchemaDefinition, ABC): # Return the C type for common use. # For the types we commonly box, this is a pointer type. @abstractmethod def c_type(self) -> str: pass # Return the C type to be used in a parameter list. def c_param_type(self) -> str: return self.c_type() # Return the C type to be used where we suppress boxing. def c_unboxed_type(self) -> str: return self.c_type() @abstractmethod def json_type(self) -> str: pass def alternate_qtype(self) -> Optional[str]: json2qtype = { 'null': 'QTYPE_QNULL', 'string': 'QTYPE_QSTRING', 'number': 'QTYPE_QNUM', 'int': 'QTYPE_QNUM', 'boolean': 'QTYPE_QBOOL', 'array': 'QTYPE_QLIST', 'object': 'QTYPE_QDICT' } return json2qtype.get(self.json_type()) def doc_type(self) -> Optional[str]: if self.is_implicit(): return None return self.name def need_has_if_optional(self) -> bool: # When FOO is a pointer, has_FOO == !!FOO, i.e. has_FOO is redundant. # Except for arrays; see QAPISchemaArrayType.need_has_if_optional(). return not self.c_type().endswith(POINTER_SUFFIX) def check(self, schema: QAPISchema) -> None: super().check(schema) for feat in self.features: if feat.is_special(): raise QAPISemError( self.info, f"feature '{feat.name}' is not supported for types") def describe(self) -> str: return "%s type '%s'" % (self.meta, self.name) class QAPISchemaBuiltinType(QAPISchemaType): meta = 'built-in' def __init__(self, name: str, json_type: str, c_type: str): super().__init__(name, None, None) 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) -> str: return self.name def c_type(self) -> str: return self._c_type_name def c_param_type(self) -> str: if self.name == 'str': return 'const ' + self._c_type_name return self._c_type_name def json_type(self) -> str: return self._json_type_name def doc_type(self) -> str: return self.json_type() def visit(self, visitor: QAPISchemaVisitor) -> None: super().visit(visitor) visitor.visit_builtin_type(self.name, self.info, self.json_type()) class QAPISchemaEnumType(QAPISchemaType): meta = 'enum' def __init__( self, name: str, info: Optional[QAPISourceInfo], doc: Optional[QAPIDoc], ifcond: Optional[QAPISchemaIfCond], features: Optional[List[QAPISchemaFeature]], members: List[QAPISchemaEnumMember], prefix: Optional[str], ): super().__init__(name, info, doc, ifcond, features) for m in members: m.set_defined_in(name) self.members = members self.prefix = prefix def check(self, schema: QAPISchema) -> None: super().check(schema) seen: Dict[str, QAPISchemaMember] = {} for m in self.members: m.check_clash(self.info, seen) def connect_doc(self, doc: Optional[QAPIDoc] = None) -> None: super().connect_doc(doc) doc = doc or self.doc for m in self.members: m.connect_doc(doc) def is_implicit(self) -> bool: # See QAPISchema._def_predefineds() return self.name == 'QType' def c_type(self) -> str: return c_name(self.name) def member_names(self) -> List[str]: return [m.name for m in self.members] def json_type(self) -> str: return 'string' def visit(self, visitor: QAPISchemaVisitor) -> None: 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: str, info: Optional[QAPISourceInfo], element_type: str ): super().__init__(name, info, None) self._element_type_name = element_type self.element_type: QAPISchemaType def need_has_if_optional(self) -> bool: # When FOO is an array, we still need has_FOO to distinguish # absent (!has_FOO) from present and empty (has_FOO && !FOO). return True def check(self, schema: QAPISchema) -> None: super().check(schema) self.element_type = schema.resolve_type( self._element_type_name, self.info, self.info.defn_meta if self.info else None) assert not isinstance(self.element_type, QAPISchemaArrayType) def set_module(self, schema: QAPISchema) -> None: self._set_module(schema, self.element_type.info) @property def ifcond(self) -> QAPISchemaIfCond: assert self._checked return self.element_type.ifcond def is_implicit(self) -> bool: return True def c_type(self) -> str: return c_name(self.name) + POINTER_SUFFIX def json_type(self) -> str: return 'array' def doc_type(self) -> Optional[str]: 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: QAPISchemaVisitor) -> None: super().visit(visitor) visitor.visit_array_type(self.name, self.info, self.ifcond, self.element_type) def describe(self) -> str: return "%s type ['%s']" % (self.meta, self._element_type_name) class QAPISchemaObjectType(QAPISchemaType): def __init__( self, name: str, info: Optional[QAPISourceInfo], doc: Optional[QAPIDoc], ifcond: Optional[QAPISchemaIfCond], features: Optional[List[QAPISchemaFeature]], base: Optional[str], local_members: List[QAPISchemaObjectTypeMember], branches: Optional[QAPISchemaBranches], ): # struct has local_members, optional base, and no branches # union has base, branches, and no local_members super().__init__(name, info, doc, ifcond, features) self.meta = 'union' if branches else 'struct' for m in local_members: m.set_defined_in(name) if branches is not None: branches.set_defined_in(name) self._base_name = base self.base = None self.local_members = local_members self.branches = branches self.members: List[QAPISchemaObjectTypeMember] self._check_complete = False def check(self, schema: QAPISchema) -> None: # 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._check_complete: # 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 not self._check_complete 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.branches): 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) # self.check_clash() works in terms of the supertype, but # self.members is declared List[QAPISchemaObjectTypeMember]. # Cast down to the subtype. members = cast(List[QAPISchemaObjectTypeMember], list(seen.values())) if self.branches: self.branches.check(schema, seen) self.branches.check_clash(self.info, seen) self.members = members self._check_complete = True # 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: Optional[QAPISourceInfo], seen: Dict[str, QAPISchemaMember], ) -> None: assert self._checked for m in self.members: m.check_clash(info, seen) if self.branches: self.branches.check_clash(info, seen) def connect_doc(self, doc: Optional[QAPIDoc] = None) -> 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) def is_implicit(self) -> bool: # See QAPISchema._make_implicit_object_type(), as well as # _def_predefineds() return self.name.startswith('q_') def is_empty(self) -> bool: return not self.members and not self.branches def has_conditional_members(self) -> bool: return any(m.ifcond.is_present() for m in self.members) def c_name(self) -> str: assert self.name != 'q_empty' return super().c_name() def c_type(self) -> str: assert not self.is_implicit() return c_name(self.name) + POINTER_SUFFIX def c_unboxed_type(self) -> str: return c_name(self.name) def json_type(self) -> str: return 'object' def visit(self, visitor: QAPISchemaVisitor) -> None: super().visit(visitor) visitor.visit_object_type( self.name, self.info, self.ifcond, self.features, self.base, self.local_members, self.branches) visitor.visit_object_type_flat( self.name, self.info, self.ifcond, self.features, self.members, self.branches) class QAPISchemaAlternateType(QAPISchemaType): meta = 'alternate' def __init__( self, name: str, info: QAPISourceInfo, doc: Optional[QAPIDoc], ifcond: Optional[QAPISchemaIfCond], features: List[QAPISchemaFeature], alternatives: QAPISchemaAlternatives, ): super().__init__(name, info, doc, ifcond, features) assert alternatives.tag_member alternatives.set_defined_in(name) alternatives.tag_member.set_defined_in(self.name) self.alternatives = alternatives def check(self, schema: QAPISchema) -> None: super().check(schema) self.alternatives.tag_member.check(schema) # Not calling self.alternatives.check_clash(), because there's # nothing to clash with self.alternatives.check(schema, {}) # Alternate branch names have no relation to the tag enum values; # so we have to check for potential name collisions ourselves. seen: Dict[str, QAPISchemaMember] = {} types_seen: Dict[str, str] = {} for v in self.alternatives.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: Optional[QAPIDoc] = None) -> None: super().connect_doc(doc) doc = doc or self.doc for v in self.alternatives.variants: v.connect_doc(doc) def c_type(self) -> str: return c_name(self.name) + POINTER_SUFFIX def json_type(self) -> str: return 'value' def visit(self, visitor: QAPISchemaVisitor) -> None: super().visit(visitor) visitor.visit_alternate_type( self.name, self.info, self.ifcond, self.features, self.alternatives) class QAPISchemaVariants: def __init__( self, info: QAPISourceInfo, variants: List[QAPISchemaVariant], ): self.info = info self.tag_member: QAPISchemaObjectTypeMember self.variants = variants def set_defined_in(self, name: str) -> None: for v in self.variants: v.set_defined_in(name) def check( self, schema: QAPISchema, seen: Dict[str, QAPISchemaMember] ) -> None: for v in self.variants: v.check(schema) class QAPISchemaBranches(QAPISchemaVariants): def __init__(self, info: QAPISourceInfo, variants: List[QAPISchemaVariant], tag_name: str): super().__init__(info, variants) self._tag_name = tag_name def check( self, schema: QAPISchema, seen: Dict[str, QAPISchemaMember] ) -> None: # We need to narrow the member type: tag_member = seen.get(c_name(self._tag_name)) assert (tag_member is None or isinstance(tag_member, QAPISchemaObjectTypeMember)) base = "'base'" # Pointing to the base type when not implicit would be # nice, but we don't know it here if not tag_member or self._tag_name != tag_member.name: raise QAPISemError( self.info, "discriminator '%s' is not a member of %s" % (self._tag_name, base)) self.tag_member = tag_member # Here we do: assert tag_member.defined_in base_type = schema.lookup_type(tag_member.defined_in) assert base_type if not base_type.is_implicit(): base = "base type '%s'" % tag_member.defined_in if not isinstance(tag_member.type, QAPISchemaEnumType): raise QAPISemError( self.info, "discriminator member '%s' of %s must be of enum type" % (self._tag_name, base)) if tag_member.optional: raise QAPISemError( self.info, "discriminator member '%s' of %s must not be optional" % (self._tag_name, base)) if tag_member.ifcond.is_present(): raise QAPISemError( self.info, "discriminator member '%s' of %s must not be conditional" % (self._tag_name, base)) # branches that are not explicitly covered get an empty type assert tag_member.defined_in cases = {v.name for v in self.variants} for m in tag_member.type.members: if m.name not in cases: v = QAPISchemaVariant(m.name, self.info, 'q_empty', m.ifcond) v.set_defined_in(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 tag_member.type.member_names(): raise QAPISemError( self.info, "branch '%s' is not a value of %s" % (v.name, tag_member.type.describe())) if not isinstance(v.type, QAPISchemaObjectType): raise QAPISemError( self.info, "%s cannot use %s" % (v.describe(self.info), v.type.describe())) v.type.check(schema) def check_clash( self, info: Optional[QAPISourceInfo], seen: Dict[str, QAPISchemaMember], ) -> None: for v in self.variants: # Reset seen map for each variant, since qapi names from one # branch do not affect another branch. # # v.type's typing is enforced in check() above. assert isinstance(v.type, QAPISchemaObjectType) v.type.check_clash(info, dict(seen)) class QAPISchemaAlternatives(QAPISchemaVariants): def __init__(self, info: QAPISourceInfo, variants: List[QAPISchemaVariant], tag_member: QAPISchemaObjectTypeMember): super().__init__(info, variants) self.tag_member = tag_member def check( self, schema: QAPISchema, seen: Dict[str, QAPISchemaMember] ) -> None: super().check(schema, seen) assert isinstance(self.tag_member.type, QAPISchemaEnumType) assert not self.tag_member.optional assert not self.tag_member.ifcond.is_present() class QAPISchemaMember: """ Represents object members, enum members and features """ role = 'member' def __init__( self, name: str, info: Optional[QAPISourceInfo], ifcond: Optional[QAPISchemaIfCond] = None, ): self.name = name self.info = info self.ifcond = ifcond or QAPISchemaIfCond() self.defined_in: Optional[str] = None def set_defined_in(self, name: str) -> None: assert not self.defined_in self.defined_in = name def check_clash( self, info: Optional[QAPISourceInfo], seen: Dict[str, QAPISchemaMember], ) -> None: 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: Optional[QAPIDoc]) -> None: if doc: doc.connect_member(self) def describe(self, info: Optional[QAPISourceInfo]) -> str: role = self.role meta = 'type' 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' meta = 'command' defined_in = defined_in[:-4] elif defined_in.endswith('-base'): # Implicit type created for a union's dict 'base' role = 'base ' + role defined_in = defined_in[:-5] else: assert False assert info is not None if defined_in != info.defn_name: return "%s '%s' of %s '%s'" % (role, self.name, meta, defined_in) return "%s '%s'" % (role, self.name) class QAPISchemaEnumMember(QAPISchemaMember): role = 'value' def __init__( self, name: str, info: Optional[QAPISourceInfo], ifcond: Optional[QAPISchemaIfCond] = None, features: Optional[List[QAPISchemaFeature]] = None, ): super().__init__(name, info, ifcond) for f in features or []: f.set_defined_in(name) self.features = features or [] def connect_doc(self, doc: Optional[QAPIDoc]) -> None: super().connect_doc(doc) if doc: for f in self.features: doc.connect_feature(f) class QAPISchemaFeature(QAPISchemaMember): role = 'feature' def is_special(self) -> bool: return self.name in ('deprecated', 'unstable') class QAPISchemaObjectTypeMember(QAPISchemaMember): def __init__( self, name: str, info: QAPISourceInfo, typ: str, optional: bool, ifcond: Optional[QAPISchemaIfCond] = None, features: Optional[List[QAPISchemaFeature]] = None, ): super().__init__(name, info, ifcond) for f in features or []: f.set_defined_in(name) self._type_name = typ self.type: QAPISchemaType # set during check() self.optional = optional self.features = features or [] def need_has(self) -> bool: return self.optional and self.type.need_has_if_optional() def check(self, schema: QAPISchema) -> None: assert self.defined_in self.type = schema.resolve_type(self._type_name, self.info, self.describe) seen: Dict[str, QAPISchemaMember] = {} for f in self.features: f.check_clash(self.info, seen) def connect_doc(self, doc: Optional[QAPIDoc]) -> None: super().connect_doc(doc) if doc: for f in self.features: doc.connect_feature(f) class QAPISchemaVariant(QAPISchemaObjectTypeMember): role = 'branch' def __init__( self, name: str, info: QAPISourceInfo, typ: str, ifcond: QAPISchemaIfCond, ): super().__init__(name, info, typ, False, ifcond) class QAPISchemaCommand(QAPISchemaDefinition): meta = 'command' def __init__( self, name: str, info: QAPISourceInfo, doc: Optional[QAPIDoc], ifcond: QAPISchemaIfCond, features: List[QAPISchemaFeature], arg_type: Optional[str], ret_type: Optional[str], gen: bool, success_response: bool, boxed: bool, allow_oob: bool, allow_preconfig: bool, coroutine: bool, ): super().__init__(name, info, doc, ifcond, features) self._arg_type_name = arg_type self.arg_type: Optional[QAPISchemaObjectType] = None self._ret_type_name = ret_type self.ret_type: Optional[QAPISchemaType] = 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: QAPISchema) -> None: assert self.info is not None super().check(schema) if self._arg_type_name: arg_type = schema.resolve_type( self._arg_type_name, self.info, "command's 'data'") if not isinstance(arg_type, QAPISchemaObjectType): raise QAPISemError( self.info, "command's 'data' cannot take %s" % arg_type.describe()) self.arg_type = arg_type if self.arg_type.branches and not self.boxed: raise QAPISemError( self.info, "command's 'data' can take %s only with 'boxed': true" % self.arg_type.describe()) self.arg_type.check(schema) if self.arg_type.has_conditional_members() and not self.boxed: raise QAPISemError( self.info, "conditional command arguments require 'boxed': true") 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 = typ.element_type if not isinstance(typ, QAPISchemaObjectType): raise QAPISemError( self.info, "command's 'returns' cannot take %s" % self.ret_type.describe()) def connect_doc(self, doc: Optional[QAPIDoc] = None) -> 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: QAPISchemaVisitor) -> None: 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(QAPISchemaDefinition): meta = 'event' def __init__( self, name: str, info: QAPISourceInfo, doc: Optional[QAPIDoc], ifcond: QAPISchemaIfCond, features: List[QAPISchemaFeature], arg_type: Optional[str], boxed: bool, ): super().__init__(name, info, doc, ifcond, features) self._arg_type_name = arg_type self.arg_type: Optional[QAPISchemaObjectType] = None self.boxed = boxed def check(self, schema: QAPISchema) -> None: super().check(schema) if self._arg_type_name: typ = schema.resolve_type( self._arg_type_name, self.info, "event's 'data'") if not isinstance(typ, QAPISchemaObjectType): raise QAPISemError( self.info, "event's 'data' cannot take %s" % typ.describe()) self.arg_type = typ if self.arg_type.branches and not self.boxed: raise QAPISemError( self.info, "event's 'data' can take %s only with 'boxed': true" % self.arg_type.describe()) self.arg_type.check(schema) if self.arg_type.has_conditional_members() and not self.boxed: raise QAPISemError( self.info, "conditional event arguments require 'boxed': true") def connect_doc(self, doc: Optional[QAPIDoc] = None) -> 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: QAPISchemaVisitor) -> None: 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: str): self.fname = fname try: parser = QAPISchemaParser(fname) except OSError as err: raise QAPIError( f"can't read schema file '{fname}': {err.strerror}" ) from err exprs = check_exprs(parser.exprs) self.docs = parser.docs self._entity_list: List[QAPISchemaEntity] = [] self._entity_dict: Dict[str, QAPISchemaDefinition] = {} self._module_dict: Dict[str, QAPISchemaModule] = 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: QAPISchemaEntity) -> None: self._entity_list.append(ent) def _def_definition(self, defn: QAPISchemaDefinition) -> None: # Only the predefined types are allowed to not have info assert defn.info or self._predefining self._def_entity(defn) # TODO reject names that differ only in '_' vs. '.' vs. '-', # because they're liable to clash in generated C. other_defn = self._entity_dict.get(defn.name) if other_defn: if other_defn.info: where = QAPISourceError(other_defn.info, "previous definition") raise QAPISemError( defn.info, "'%s' is already defined\n%s" % (defn.name, where)) raise QAPISemError( defn.info, "%s is already defined" % other_defn.describe()) self._entity_dict[defn.name] = defn def lookup_entity(self,name: str) -> Optional[QAPISchemaEntity]: return self._entity_dict.get(name) def lookup_type(self, name: str) -> Optional[QAPISchemaType]: typ = self.lookup_entity(name) if isinstance(typ, QAPISchemaType): return typ return None def resolve_type( self, name: str, info: Optional[QAPISourceInfo], what: Union[None, str, Callable[[QAPISourceInfo], str]], ) -> QAPISchemaType: typ = self.lookup_type(name) if not typ: assert info and what # built-in types must not fail lookup 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: str) -> QAPISchemaModule: 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: str) -> QAPISchemaModule: name = self._module_name(fname) return self._module_dict[name] def _def_include(self, expr: QAPIExpression) -> None: include = expr['include'] assert expr.doc is None self._def_entity( QAPISchemaInclude(self._make_module(include), expr.info)) def _def_builtin_type( self, name: str, json_type: str, c_type: str ) -> None: self._def_definition(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) -> None: 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_definition(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_definition(QAPISchemaEnumType( 'QType', None, None, None, None, qtype_values, 'QTYPE')) def _make_features( self, features: Optional[List[Dict[str, Any]]], info: Optional[QAPISourceInfo], ) -> List[QAPISchemaFeature]: if features is None: return [] return [QAPISchemaFeature(f['name'], info, QAPISchemaIfCond(f.get('if'))) for f in features] def _make_enum_member( self, name: str, ifcond: Optional[Union[str, Dict[str, Any]]], features: Optional[List[Dict[str, Any]]], info: Optional[QAPISourceInfo], ) -> QAPISchemaEnumMember: return QAPISchemaEnumMember(name, info, QAPISchemaIfCond(ifcond), self._make_features(features, info)) def _make_enum_members( self, values: List[Dict[str, Any]], info: Optional[QAPISourceInfo] ) -> List[QAPISchemaEnumMember]: return [self._make_enum_member(v['name'], v.get('if'), v.get('features'), info) for v in values] def _make_array_type( self, element_type: str, info: Optional[QAPISourceInfo] ) -> str: name = element_type + 'List' # reserved by check_defn_name_str() if not self.lookup_type(name): self._def_definition(QAPISchemaArrayType( name, info, element_type)) return name def _make_implicit_object_type( self, name: str, info: QAPISourceInfo, ifcond: QAPISchemaIfCond, role: str, members: List[QAPISchemaObjectTypeMember], ) -> Optional[str]: if not members: return None # See also QAPISchemaObjectTypeMember.describe() name = 'q_obj_%s-%s' % (name, role) typ = self.lookup_entity(name) if typ: assert(isinstance(typ, QAPISchemaObjectType)) # The implicit object type has multiple users. This can # only be a duplicate definition, which will be flagged # later. pass else: self._def_definition(QAPISchemaObjectType( name, info, None, ifcond, None, None, members, None)) return name def _def_enum_type(self, expr: QAPIExpression) -> None: name = expr['enum'] data = expr['data'] prefix = expr.get('prefix') ifcond = QAPISchemaIfCond(expr.get('if')) info = expr.info features = self._make_features(expr.get('features'), info) self._def_definition(QAPISchemaEnumType( name, info, expr.doc, ifcond, features, self._make_enum_members(data, info), prefix)) def _make_member( self, name: str, typ: Union[List[str], str], ifcond: QAPISchemaIfCond, features: Optional[List[Dict[str, Any]]], info: QAPISourceInfo, ) -> QAPISchemaObjectTypeMember: 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: Dict[str, Any], info: QAPISourceInfo, ) -> List[QAPISchemaObjectTypeMember]: return [self._make_member(key, value['type'], QAPISchemaIfCond(value.get('if')), value.get('features'), info) for (key, value) in data.items()] def _def_struct_type(self, expr: QAPIExpression) -> None: name = expr['struct'] base = expr.get('base') data = expr['data'] info = expr.info ifcond = QAPISchemaIfCond(expr.get('if')) features = self._make_features(expr.get('features'), info) self._def_definition(QAPISchemaObjectType( name, info, expr.doc, ifcond, features, base, self._make_members(data, info), None)) def _make_variant( self, case: str, typ: str, ifcond: QAPISchemaIfCond, info: QAPISourceInfo, ) -> QAPISchemaVariant: if isinstance(typ, list): assert len(typ) == 1 typ = self._make_array_type(typ[0], info) return QAPISchemaVariant(case, info, typ, ifcond) def _def_union_type(self, expr: QAPIExpression) -> None: name = expr['union'] base = expr['base'] tag_name = expr['discriminator'] data = expr['data'] assert isinstance(data, dict) info = expr.info ifcond = QAPISchemaIfCond(expr.get('if')) features = self._make_features(expr.get('features'), info) if isinstance(base, dict): base = self._make_implicit_object_type( name, info, ifcond, 'base', self._make_members(base, info)) variants = [ self._make_variant(key, value['type'], QAPISchemaIfCond(value.get('if')), info) for (key, value) in data.items()] members: List[QAPISchemaObjectTypeMember] = [] self._def_definition( QAPISchemaObjectType(name, info, expr.doc, ifcond, features, base, members, QAPISchemaBranches( info, variants, tag_name))) def _def_alternate_type(self, expr: QAPIExpression) -> None: name = expr['alternate'] data = expr['data'] assert isinstance(data, dict) ifcond = QAPISchemaIfCond(expr.get('if')) info = expr.info features = self._make_features(expr.get('features'), info) variants = [ self._make_variant(key, value['type'], QAPISchemaIfCond(value.get('if')), info) for (key, value) in data.items()] tag_member = QAPISchemaObjectTypeMember('type', info, 'QType', False) self._def_definition( QAPISchemaAlternateType( name, info, expr.doc, ifcond, features, QAPISchemaAlternatives(info, variants, tag_member))) def _def_command(self, expr: QAPIExpression) -> None: 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 = QAPISchemaIfCond(expr.get('if')) info = expr.info 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_definition( QAPISchemaCommand(name, info, expr.doc, ifcond, features, data, rets, gen, success_response, boxed, allow_oob, allow_preconfig, coroutine)) def _def_event(self, expr: QAPIExpression) -> None: name = expr['event'] data = expr.get('data') boxed = expr.get('boxed', False) ifcond = QAPISchemaIfCond(expr.get('if')) info = expr.info 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_definition(QAPISchemaEvent(name, info, expr.doc, ifcond, features, data, boxed)) def _def_exprs(self, exprs: List[QAPIExpression]) -> None: for expr in exprs: if 'enum' in expr: self._def_enum_type(expr) elif 'struct' in expr: self._def_struct_type(expr) elif 'union' in expr: self._def_union_type(expr) elif 'alternate' in expr: self._def_alternate_type(expr) elif 'command' in expr: self._def_command(expr) elif 'event' in expr: self._def_event(expr) elif 'include' in expr: self._def_include(expr) else: assert False def check(self) -> None: for ent in self._entity_list: ent.check(self) ent.connect_doc() for ent in self._entity_list: ent.set_module(self) for doc in self.docs: doc.check() def visit(self, visitor: QAPISchemaVisitor) -> None: visitor.visit_begin(self) for mod in self._module_dict.values(): mod.visit(visitor) visitor.visit_end()