blob: 0ef9b3398a9e05778eef66c4ab0437ef255ed272 [file] [log] [blame]
# -*- 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.
# pylint: disable=too-many-lines
# TODO catching name collisions in generated code would be nice
from abc import ABC, abstractmethod
from collections import OrderedDict
import os
import re
from typing import List, Optional
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 QAPIExpression, QAPISchemaParser
class QAPISchemaIfCond:
def __init__(self, ifcond=None):
self.ifcond = ifcond
def _cgen(self):
return cgen_ifcond(self.ifcond)
def gen_if(self):
return gen_if(self._cgen())
def gen_endif(self):
return gen_endif(self._cgen())
def docgen(self):
return docgen_ifcond(self.ifcond)
def is_present(self):
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):
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._checked = False
def __repr__(self):
return "<%s at 0x%x>" % (type(self).__name__, id(self))
def check(self, schema):
# pylint: disable=unused-argument
self._checked = True
def connect_doc(self, doc=None):
pass
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)
def visit(self, visitor):
# pylint: disable=unused-argument
assert self._checked
class QAPISchemaDefinition(QAPISchemaEntity):
meta: Optional[str] = None
def __init__(self, name: str, info, doc, ifcond=None, features=None):
assert isinstance(name, str)
super().__init__(info)
for f in features or []:
assert isinstance(f, QAPISchemaFeature)
f.set_defined_in(name)
self.name = name
self.doc = doc
self._ifcond = ifcond or QAPISchemaIfCond()
self.features = features or []
def __repr__(self):
return "<%s:%s at 0x%x>" % (type(self).__name__, self.name,
id(self))
def c_name(self):
return c_name(self.name)
def check(self, schema):
assert not self._checked
super().check(schema)
seen = {}
for f in self.features:
f.check_clash(self.info, seen)
def connect_doc(self, doc=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):
assert self._checked
return self._ifcond
def is_implicit(self):
return not self.info
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):
# pylint: disable=unused-argument
# 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__(info)
self._sub_module = sub_module
def visit(self, visitor):
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):
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()
@abstractmethod
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',
'array': 'QTYPE_QLIST',
'object': 'QTYPE_QDICT'
}
return json2qtype.get(self.json_type())
def doc_type(self):
if self.is_implicit():
return None
return self.name
def need_has_if_optional(self):
# 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):
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):
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._def_predefineds()
return 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: QAPISchemaType
def need_has_if_optional(self):
# 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):
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
# union has base, variants, and no local_members
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
for m in self.members:
m.check_clash(info, seen)
if self.variants:
self.variants.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)
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 has_conditional_members(self):
assert self.members is not None
return any(m.ifcond.is_present() for m in self.members)
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):
# Unions pass tag_name but not tag_member.
# Alternates pass tag_member but not tag_name.
# After check(), tag_member is always set.
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 self._tag_name: # 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.is_present():
raise QAPISemError(
self.info,
"discriminator member '%s' of %s must not be conditional"
% (self._tag_name, base))
else: # alternate
assert isinstance(self.tag_member.type, QAPISchemaEnumType)
assert not self.tag_member.optional
assert not self.tag_member.ifcond.is_present()
if self._tag_name: # 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):
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 QAPISchemaIfCond()
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
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
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, info, ifcond=None, features=None):
super().__init__(name, info, ifcond)
for f in features or []:
assert isinstance(f, QAPISchemaFeature)
f.set_defined_in(name)
self.features = features or []
def connect_doc(self, doc):
super().connect_doc(doc)
if doc:
for f in self.features:
doc.connect_feature(f)
class QAPISchemaFeature(QAPISchemaMember):
role = 'feature'
def is_special(self):
return self.name in ('deprecated', 'unstable')
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: QAPISchemaType # set during check()
self.optional = optional
self.features = features or []
def need_has(self):
assert self.type
return self.optional and self.type.need_has_if_optional()
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(QAPISchemaDefinition):
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:
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.variants 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):
assert typ
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=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(QAPISchemaDefinition):
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:
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.variants 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=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):
self._entity_list.append(ent)
def _def_definition(self, defn):
# 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, typ=None):
ent = self._entity_dict.get(name)
if typ and not isinstance(ent, typ):
return None
return ent
def lookup_type(self, name):
typ = self.lookup_entity(name, QAPISchemaType)
assert typ is None or isinstance(typ, QAPISchemaType)
return typ
def resolve_type(self, name, info, what):
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):
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: QAPIExpression):
include = expr['include']
assert expr.doc is None
self._def_entity(
QAPISchemaInclude(self._make_module(include), expr.info))
def _def_builtin_type(self, name, json_type, c_type):
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):
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, info):
if features is None:
return []
return [QAPISchemaFeature(f['name'], info,
QAPISchemaIfCond(f.get('if')))
for f in features]
def _make_enum_member(self, name, ifcond, features, info):
return QAPISchemaEnumMember(name, info,
QAPISchemaIfCond(ifcond),
self._make_features(features, info))
def _make_enum_members(self, values, info):
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, info):
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, 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
# 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):
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, 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'],
QAPISchemaIfCond(value.get('if')),
value.get('features'), info)
for (key, value) in data.items()]
def _def_struct_type(self, expr: QAPIExpression):
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, typ, ifcond, info):
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):
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,
QAPISchemaVariants(
tag_name, info, None, variants)))
def _def_alternate_type(self, expr: QAPIExpression):
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,
QAPISchemaVariants(None, info, tag_member, variants)))
def _def_command(self, expr: QAPIExpression):
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):
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):
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):
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):
visitor.visit_begin(self)
for mod in self._module_dict.values():
mod.visit(visitor)
visitor.visit_end()