| # -*- coding: utf-8 -*- |
| # |
| # QAPI schema internal representation |
| # |
| # Copyright (c) 2015-2019 Red Hat Inc. |
| # |
| # Authors: |
| # Markus Armbruster <armbru@redhat.com> |
| # Eric Blake <eblake@redhat.com> |
| # Marc-André Lureau <marcandre.lureau@redhat.com> |
| # |
| # 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 QAPIError, 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 |
| |
| 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 = [] |
| 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() |
