1# -*- coding: utf-8 -*- 2# 3# QAPI schema internal representation 4# 5# Copyright (c) 2015-2019 Red Hat Inc. 6# 7# Authors: 8# Markus Armbruster <armbru@redhat.com> 9# Eric Blake <eblake@redhat.com> 10# Marc-André Lureau <marcandre.lureau@redhat.com> 11# 12# This work is licensed under the terms of the GNU GPL, version 2. 13# See the COPYING file in the top-level directory. 14 15# pylint: disable=too-many-lines 16 17# TODO catching name collisions in generated code would be nice 18 19from abc import ABC, abstractmethod 20from collections import OrderedDict 21import os 22import re 23from typing import List, Optional 24 25from .common import ( 26 POINTER_SUFFIX, 27 c_name, 28 cgen_ifcond, 29 docgen_ifcond, 30 gen_endif, 31 gen_if, 32) 33from .error import QAPIError, QAPISemError, QAPISourceError 34from .expr import check_exprs 35from .parser import QAPIExpression, QAPISchemaParser 36 37 38class QAPISchemaIfCond: 39 def __init__(self, ifcond=None): 40 self.ifcond = ifcond 41 42 def _cgen(self): 43 return cgen_ifcond(self.ifcond) 44 45 def gen_if(self): 46 return gen_if(self._cgen()) 47 48 def gen_endif(self): 49 return gen_endif(self._cgen()) 50 51 def docgen(self): 52 return docgen_ifcond(self.ifcond) 53 54 def is_present(self): 55 return bool(self.ifcond) 56 57 58class QAPISchemaEntity: 59 """ 60 A schema entity. 61 62 This is either a directive, such as include, or a definition. 63 The latter uses sub-class `QAPISchemaDefinition`. 64 """ 65 def __init__(self, info): 66 self._module = None 67 # For explicitly defined entities, info points to the (explicit) 68 # definition. For builtins (and their arrays), info is None. 69 # For implicitly defined entities, info points to a place that 70 # triggered the implicit definition (there may be more than one 71 # such place). 72 self.info = info 73 self._checked = False 74 75 def __repr__(self): 76 return "<%s at 0x%x>" % (type(self).__name__, id(self)) 77 78 def check(self, schema): 79 # pylint: disable=unused-argument 80 self._checked = True 81 82 def connect_doc(self, doc=None): 83 pass 84 85 def _set_module(self, schema, info): 86 assert self._checked 87 fname = info.fname if info else QAPISchemaModule.BUILTIN_MODULE_NAME 88 self._module = schema.module_by_fname(fname) 89 self._module.add_entity(self) 90 91 def set_module(self, schema): 92 self._set_module(schema, self.info) 93 94 def visit(self, visitor): 95 # pylint: disable=unused-argument 96 assert self._checked 97 98 99class QAPISchemaDefinition(QAPISchemaEntity): 100 meta: Optional[str] = None 101 102 def __init__(self, name: str, info, doc, ifcond=None, features=None): 103 assert isinstance(name, str) 104 super().__init__(info) 105 for f in features or []: 106 assert isinstance(f, QAPISchemaFeature) 107 f.set_defined_in(name) 108 self.name = name 109 self.doc = doc 110 self._ifcond = ifcond or QAPISchemaIfCond() 111 self.features = features or [] 112 113 def __repr__(self): 114 return "<%s:%s at 0x%x>" % (type(self).__name__, self.name, 115 id(self)) 116 117 def c_name(self): 118 return c_name(self.name) 119 120 def check(self, schema): 121 assert not self._checked 122 super().check(schema) 123 seen = {} 124 for f in self.features: 125 f.check_clash(self.info, seen) 126 127 def connect_doc(self, doc=None): 128 super().connect_doc(doc) 129 doc = doc or self.doc 130 if doc: 131 for f in self.features: 132 doc.connect_feature(f) 133 134 @property 135 def ifcond(self): 136 assert self._checked 137 return self._ifcond 138 139 def is_implicit(self): 140 return not self.info 141 142 def describe(self): 143 assert self.meta 144 return "%s '%s'" % (self.meta, self.name) 145 146 147class QAPISchemaVisitor: 148 def visit_begin(self, schema): 149 pass 150 151 def visit_end(self): 152 pass 153 154 def visit_module(self, name): 155 pass 156 157 def visit_needed(self, entity): 158 # pylint: disable=unused-argument 159 # Default to visiting everything 160 return True 161 162 def visit_include(self, name, info): 163 pass 164 165 def visit_builtin_type(self, name, info, json_type): 166 pass 167 168 def visit_enum_type(self, name, info, ifcond, features, members, prefix): 169 pass 170 171 def visit_array_type(self, name, info, ifcond, element_type): 172 pass 173 174 def visit_object_type(self, name, info, ifcond, features, 175 base, members, variants): 176 pass 177 178 def visit_object_type_flat(self, name, info, ifcond, features, 179 members, variants): 180 pass 181 182 def visit_alternate_type(self, name, info, ifcond, features, variants): 183 pass 184 185 def visit_command(self, name, info, ifcond, features, 186 arg_type, ret_type, gen, success_response, boxed, 187 allow_oob, allow_preconfig, coroutine): 188 pass 189 190 def visit_event(self, name, info, ifcond, features, arg_type, boxed): 191 pass 192 193 194class QAPISchemaModule: 195 196 BUILTIN_MODULE_NAME = './builtin' 197 198 def __init__(self, name): 199 self.name = name 200 self._entity_list = [] 201 202 @staticmethod 203 def is_system_module(name: str) -> bool: 204 """ 205 System modules are internally defined modules. 206 207 Their names start with the "./" prefix. 208 """ 209 return name.startswith('./') 210 211 @classmethod 212 def is_user_module(cls, name: str) -> bool: 213 """ 214 User modules are those defined by the user in qapi JSON files. 215 216 They do not start with the "./" prefix. 217 """ 218 return not cls.is_system_module(name) 219 220 @classmethod 221 def is_builtin_module(cls, name: str) -> bool: 222 """ 223 The built-in module is a single System module for the built-in types. 224 225 It is always "./builtin". 226 """ 227 return name == cls.BUILTIN_MODULE_NAME 228 229 def add_entity(self, ent): 230 self._entity_list.append(ent) 231 232 def visit(self, visitor): 233 visitor.visit_module(self.name) 234 for entity in self._entity_list: 235 if visitor.visit_needed(entity): 236 entity.visit(visitor) 237 238 239class QAPISchemaInclude(QAPISchemaEntity): 240 def __init__(self, sub_module, info): 241 super().__init__(info) 242 self._sub_module = sub_module 243 244 def visit(self, visitor): 245 super().visit(visitor) 246 visitor.visit_include(self._sub_module.name, self.info) 247 248 249class QAPISchemaType(QAPISchemaDefinition, ABC): 250 # Return the C type for common use. 251 # For the types we commonly box, this is a pointer type. 252 @abstractmethod 253 def c_type(self): 254 pass 255 256 # Return the C type to be used in a parameter list. 257 def c_param_type(self): 258 return self.c_type() 259 260 # Return the C type to be used where we suppress boxing. 261 def c_unboxed_type(self): 262 return self.c_type() 263 264 @abstractmethod 265 def json_type(self): 266 pass 267 268 def alternate_qtype(self): 269 json2qtype = { 270 'null': 'QTYPE_QNULL', 271 'string': 'QTYPE_QSTRING', 272 'number': 'QTYPE_QNUM', 273 'int': 'QTYPE_QNUM', 274 'boolean': 'QTYPE_QBOOL', 275 'array': 'QTYPE_QLIST', 276 'object': 'QTYPE_QDICT' 277 } 278 return json2qtype.get(self.json_type()) 279 280 def doc_type(self): 281 if self.is_implicit(): 282 return None 283 return self.name 284 285 def need_has_if_optional(self): 286 # When FOO is a pointer, has_FOO == !!FOO, i.e. has_FOO is redundant. 287 # Except for arrays; see QAPISchemaArrayType.need_has_if_optional(). 288 return not self.c_type().endswith(POINTER_SUFFIX) 289 290 def check(self, schema): 291 super().check(schema) 292 for feat in self.features: 293 if feat.is_special(): 294 raise QAPISemError( 295 self.info, 296 f"feature '{feat.name}' is not supported for types") 297 298 def describe(self): 299 assert self.meta 300 return "%s type '%s'" % (self.meta, self.name) 301 302 303class QAPISchemaBuiltinType(QAPISchemaType): 304 meta = 'built-in' 305 306 def __init__(self, name, json_type, c_type): 307 super().__init__(name, None, None) 308 assert not c_type or isinstance(c_type, str) 309 assert json_type in ('string', 'number', 'int', 'boolean', 'null', 310 'value') 311 self._json_type_name = json_type 312 self._c_type_name = c_type 313 314 def c_name(self): 315 return self.name 316 317 def c_type(self): 318 return self._c_type_name 319 320 def c_param_type(self): 321 if self.name == 'str': 322 return 'const ' + self._c_type_name 323 return self._c_type_name 324 325 def json_type(self): 326 return self._json_type_name 327 328 def doc_type(self): 329 return self.json_type() 330 331 def visit(self, visitor): 332 super().visit(visitor) 333 visitor.visit_builtin_type(self.name, self.info, self.json_type()) 334 335 336class QAPISchemaEnumType(QAPISchemaType): 337 meta = 'enum' 338 339 def __init__(self, name, info, doc, ifcond, features, members, prefix): 340 super().__init__(name, info, doc, ifcond, features) 341 for m in members: 342 assert isinstance(m, QAPISchemaEnumMember) 343 m.set_defined_in(name) 344 assert prefix is None or isinstance(prefix, str) 345 self.members = members 346 self.prefix = prefix 347 348 def check(self, schema): 349 super().check(schema) 350 seen = {} 351 for m in self.members: 352 m.check_clash(self.info, seen) 353 354 def connect_doc(self, doc=None): 355 super().connect_doc(doc) 356 doc = doc or self.doc 357 for m in self.members: 358 m.connect_doc(doc) 359 360 def is_implicit(self): 361 # See QAPISchema._def_predefineds() 362 return self.name == 'QType' 363 364 def c_type(self): 365 return c_name(self.name) 366 367 def member_names(self): 368 return [m.name for m in self.members] 369 370 def json_type(self): 371 return 'string' 372 373 def visit(self, visitor): 374 super().visit(visitor) 375 visitor.visit_enum_type( 376 self.name, self.info, self.ifcond, self.features, 377 self.members, self.prefix) 378 379 380class QAPISchemaArrayType(QAPISchemaType): 381 meta = 'array' 382 383 def __init__(self, name, info, element_type): 384 super().__init__(name, info, None) 385 assert isinstance(element_type, str) 386 self._element_type_name = element_type 387 self.element_type: QAPISchemaType 388 389 def need_has_if_optional(self): 390 # When FOO is an array, we still need has_FOO to distinguish 391 # absent (!has_FOO) from present and empty (has_FOO && !FOO). 392 return True 393 394 def check(self, schema): 395 super().check(schema) 396 self.element_type = schema.resolve_type( 397 self._element_type_name, self.info, 398 self.info and self.info.defn_meta) 399 assert not isinstance(self.element_type, QAPISchemaArrayType) 400 401 def set_module(self, schema): 402 self._set_module(schema, self.element_type.info) 403 404 @property 405 def ifcond(self): 406 assert self._checked 407 return self.element_type.ifcond 408 409 def is_implicit(self): 410 return True 411 412 def c_type(self): 413 return c_name(self.name) + POINTER_SUFFIX 414 415 def json_type(self): 416 return 'array' 417 418 def doc_type(self): 419 elt_doc_type = self.element_type.doc_type() 420 if not elt_doc_type: 421 return None 422 return 'array of ' + elt_doc_type 423 424 def visit(self, visitor): 425 super().visit(visitor) 426 visitor.visit_array_type(self.name, self.info, self.ifcond, 427 self.element_type) 428 429 def describe(self): 430 assert self.meta 431 return "%s type ['%s']" % (self.meta, self._element_type_name) 432 433 434class QAPISchemaObjectType(QAPISchemaType): 435 def __init__(self, name, info, doc, ifcond, features, 436 base, local_members, variants): 437 # struct has local_members, optional base, and no variants 438 # union has base, variants, and no local_members 439 super().__init__(name, info, doc, ifcond, features) 440 self.meta = 'union' if variants else 'struct' 441 assert base is None or isinstance(base, str) 442 for m in local_members: 443 assert isinstance(m, QAPISchemaObjectTypeMember) 444 m.set_defined_in(name) 445 if variants is not None: 446 assert isinstance(variants, QAPISchemaVariants) 447 variants.set_defined_in(name) 448 self._base_name = base 449 self.base = None 450 self.local_members = local_members 451 self.variants = variants 452 self.members = None 453 454 def check(self, schema): 455 # This calls another type T's .check() exactly when the C 456 # struct emitted by gen_object() contains that T's C struct 457 # (pointers don't count). 458 if self.members is not None: 459 # A previous .check() completed: nothing to do 460 return 461 if self._checked: 462 # Recursed: C struct contains itself 463 raise QAPISemError(self.info, 464 "object %s contains itself" % self.name) 465 466 super().check(schema) 467 assert self._checked and self.members is None 468 469 seen = OrderedDict() 470 if self._base_name: 471 self.base = schema.resolve_type(self._base_name, self.info, 472 "'base'") 473 if (not isinstance(self.base, QAPISchemaObjectType) 474 or self.base.variants): 475 raise QAPISemError( 476 self.info, 477 "'base' requires a struct type, %s isn't" 478 % self.base.describe()) 479 self.base.check(schema) 480 self.base.check_clash(self.info, seen) 481 for m in self.local_members: 482 m.check(schema) 483 m.check_clash(self.info, seen) 484 members = seen.values() 485 486 if self.variants: 487 self.variants.check(schema, seen) 488 self.variants.check_clash(self.info, seen) 489 490 self.members = members # mark completed 491 492 # Check that the members of this type do not cause duplicate JSON members, 493 # and update seen to track the members seen so far. Report any errors 494 # on behalf of info, which is not necessarily self.info 495 def check_clash(self, info, seen): 496 assert self._checked 497 for m in self.members: 498 m.check_clash(info, seen) 499 if self.variants: 500 self.variants.check_clash(info, seen) 501 502 def connect_doc(self, doc=None): 503 super().connect_doc(doc) 504 doc = doc or self.doc 505 if self.base and self.base.is_implicit(): 506 self.base.connect_doc(doc) 507 for m in self.local_members: 508 m.connect_doc(doc) 509 510 def is_implicit(self): 511 # See QAPISchema._make_implicit_object_type(), as well as 512 # _def_predefineds() 513 return self.name.startswith('q_') 514 515 def is_empty(self): 516 assert self.members is not None 517 return not self.members and not self.variants 518 519 def has_conditional_members(self): 520 assert self.members is not None 521 return any(m.ifcond.is_present() for m in self.members) 522 523 def c_name(self): 524 assert self.name != 'q_empty' 525 return super().c_name() 526 527 def c_type(self): 528 assert not self.is_implicit() 529 return c_name(self.name) + POINTER_SUFFIX 530 531 def c_unboxed_type(self): 532 return c_name(self.name) 533 534 def json_type(self): 535 return 'object' 536 537 def visit(self, visitor): 538 super().visit(visitor) 539 visitor.visit_object_type( 540 self.name, self.info, self.ifcond, self.features, 541 self.base, self.local_members, self.variants) 542 visitor.visit_object_type_flat( 543 self.name, self.info, self.ifcond, self.features, 544 self.members, self.variants) 545 546 547class QAPISchemaAlternateType(QAPISchemaType): 548 meta = 'alternate' 549 550 def __init__(self, name, info, doc, ifcond, features, variants): 551 super().__init__(name, info, doc, ifcond, features) 552 assert isinstance(variants, QAPISchemaVariants) 553 assert variants.tag_member 554 variants.set_defined_in(name) 555 variants.tag_member.set_defined_in(self.name) 556 self.variants = variants 557 558 def check(self, schema): 559 super().check(schema) 560 self.variants.tag_member.check(schema) 561 # Not calling self.variants.check_clash(), because there's nothing 562 # to clash with 563 self.variants.check(schema, {}) 564 # Alternate branch names have no relation to the tag enum values; 565 # so we have to check for potential name collisions ourselves. 566 seen = {} 567 types_seen = {} 568 for v in self.variants.variants: 569 v.check_clash(self.info, seen) 570 qtype = v.type.alternate_qtype() 571 if not qtype: 572 raise QAPISemError( 573 self.info, 574 "%s cannot use %s" 575 % (v.describe(self.info), v.type.describe())) 576 conflicting = set([qtype]) 577 if qtype == 'QTYPE_QSTRING': 578 if isinstance(v.type, QAPISchemaEnumType): 579 for m in v.type.members: 580 if m.name in ['on', 'off']: 581 conflicting.add('QTYPE_QBOOL') 582 if re.match(r'[-+0-9.]', m.name): 583 # lazy, could be tightened 584 conflicting.add('QTYPE_QNUM') 585 else: 586 conflicting.add('QTYPE_QNUM') 587 conflicting.add('QTYPE_QBOOL') 588 for qt in conflicting: 589 if qt in types_seen: 590 raise QAPISemError( 591 self.info, 592 "%s can't be distinguished from '%s'" 593 % (v.describe(self.info), types_seen[qt])) 594 types_seen[qt] = v.name 595 596 def connect_doc(self, doc=None): 597 super().connect_doc(doc) 598 doc = doc or self.doc 599 for v in self.variants.variants: 600 v.connect_doc(doc) 601 602 def c_type(self): 603 return c_name(self.name) + POINTER_SUFFIX 604 605 def json_type(self): 606 return 'value' 607 608 def visit(self, visitor): 609 super().visit(visitor) 610 visitor.visit_alternate_type( 611 self.name, self.info, self.ifcond, self.features, self.variants) 612 613 614class QAPISchemaVariants: 615 def __init__(self, tag_name, info, tag_member, variants): 616 # Unions pass tag_name but not tag_member. 617 # Alternates pass tag_member but not tag_name. 618 # After check(), tag_member is always set. 619 assert bool(tag_member) != bool(tag_name) 620 assert (isinstance(tag_name, str) or 621 isinstance(tag_member, QAPISchemaObjectTypeMember)) 622 for v in variants: 623 assert isinstance(v, QAPISchemaVariant) 624 self._tag_name = tag_name 625 self.info = info 626 self.tag_member = tag_member 627 self.variants = variants 628 629 def set_defined_in(self, name): 630 for v in self.variants: 631 v.set_defined_in(name) 632 633 def check(self, schema, seen): 634 if self._tag_name: # union 635 self.tag_member = seen.get(c_name(self._tag_name)) 636 base = "'base'" 637 # Pointing to the base type when not implicit would be 638 # nice, but we don't know it here 639 if not self.tag_member or self._tag_name != self.tag_member.name: 640 raise QAPISemError( 641 self.info, 642 "discriminator '%s' is not a member of %s" 643 % (self._tag_name, base)) 644 # Here we do: 645 base_type = schema.lookup_type(self.tag_member.defined_in) 646 assert base_type 647 if not base_type.is_implicit(): 648 base = "base type '%s'" % self.tag_member.defined_in 649 if not isinstance(self.tag_member.type, QAPISchemaEnumType): 650 raise QAPISemError( 651 self.info, 652 "discriminator member '%s' of %s must be of enum type" 653 % (self._tag_name, base)) 654 if self.tag_member.optional: 655 raise QAPISemError( 656 self.info, 657 "discriminator member '%s' of %s must not be optional" 658 % (self._tag_name, base)) 659 if self.tag_member.ifcond.is_present(): 660 raise QAPISemError( 661 self.info, 662 "discriminator member '%s' of %s must not be conditional" 663 % (self._tag_name, base)) 664 else: # alternate 665 assert isinstance(self.tag_member.type, QAPISchemaEnumType) 666 assert not self.tag_member.optional 667 assert not self.tag_member.ifcond.is_present() 668 if self._tag_name: # union 669 # branches that are not explicitly covered get an empty type 670 cases = {v.name for v in self.variants} 671 for m in self.tag_member.type.members: 672 if m.name not in cases: 673 v = QAPISchemaVariant(m.name, self.info, 674 'q_empty', m.ifcond) 675 v.set_defined_in(self.tag_member.defined_in) 676 self.variants.append(v) 677 if not self.variants: 678 raise QAPISemError(self.info, "union has no branches") 679 for v in self.variants: 680 v.check(schema) 681 # Union names must match enum values; alternate names are 682 # checked separately. Use 'seen' to tell the two apart. 683 if seen: 684 if v.name not in self.tag_member.type.member_names(): 685 raise QAPISemError( 686 self.info, 687 "branch '%s' is not a value of %s" 688 % (v.name, self.tag_member.type.describe())) 689 if not isinstance(v.type, QAPISchemaObjectType): 690 raise QAPISemError( 691 self.info, 692 "%s cannot use %s" 693 % (v.describe(self.info), v.type.describe())) 694 v.type.check(schema) 695 696 def check_clash(self, info, seen): 697 for v in self.variants: 698 # Reset seen map for each variant, since qapi names from one 699 # branch do not affect another branch 700 v.type.check_clash(info, dict(seen)) 701 702 703class QAPISchemaMember: 704 """ Represents object members, enum members and features """ 705 role = 'member' 706 707 def __init__(self, name, info, ifcond=None): 708 assert isinstance(name, str) 709 self.name = name 710 self.info = info 711 self.ifcond = ifcond or QAPISchemaIfCond() 712 self.defined_in = None 713 714 def set_defined_in(self, name): 715 assert not self.defined_in 716 self.defined_in = name 717 718 def check_clash(self, info, seen): 719 cname = c_name(self.name) 720 if cname in seen: 721 raise QAPISemError( 722 info, 723 "%s collides with %s" 724 % (self.describe(info), seen[cname].describe(info))) 725 seen[cname] = self 726 727 def connect_doc(self, doc): 728 if doc: 729 doc.connect_member(self) 730 731 def describe(self, info): 732 role = self.role 733 meta = 'type' 734 defined_in = self.defined_in 735 assert defined_in 736 737 if defined_in.startswith('q_obj_'): 738 # See QAPISchema._make_implicit_object_type() - reverse the 739 # mapping there to create a nice human-readable description 740 defined_in = defined_in[6:] 741 if defined_in.endswith('-arg'): 742 # Implicit type created for a command's dict 'data' 743 assert role == 'member' 744 role = 'parameter' 745 meta = 'command' 746 defined_in = defined_in[:-4] 747 elif defined_in.endswith('-base'): 748 # Implicit type created for a union's dict 'base' 749 role = 'base ' + role 750 defined_in = defined_in[:-5] 751 else: 752 assert False 753 754 if defined_in != info.defn_name: 755 return "%s '%s' of %s '%s'" % (role, self.name, meta, defined_in) 756 return "%s '%s'" % (role, self.name) 757 758 759class QAPISchemaEnumMember(QAPISchemaMember): 760 role = 'value' 761 762 def __init__(self, name, info, ifcond=None, features=None): 763 super().__init__(name, info, ifcond) 764 for f in features or []: 765 assert isinstance(f, QAPISchemaFeature) 766 f.set_defined_in(name) 767 self.features = features or [] 768 769 def connect_doc(self, doc): 770 super().connect_doc(doc) 771 if doc: 772 for f in self.features: 773 doc.connect_feature(f) 774 775 776class QAPISchemaFeature(QAPISchemaMember): 777 role = 'feature' 778 779 def is_special(self): 780 return self.name in ('deprecated', 'unstable') 781 782 783class QAPISchemaObjectTypeMember(QAPISchemaMember): 784 def __init__(self, name, info, typ, optional, ifcond=None, features=None): 785 super().__init__(name, info, ifcond) 786 assert isinstance(typ, str) 787 assert isinstance(optional, bool) 788 for f in features or []: 789 assert isinstance(f, QAPISchemaFeature) 790 f.set_defined_in(name) 791 self._type_name = typ 792 self.type: QAPISchemaType # set during check() 793 self.optional = optional 794 self.features = features or [] 795 796 def need_has(self): 797 assert self.type 798 return self.optional and self.type.need_has_if_optional() 799 800 def check(self, schema): 801 assert self.defined_in 802 self.type = schema.resolve_type(self._type_name, self.info, 803 self.describe) 804 seen = {} 805 for f in self.features: 806 f.check_clash(self.info, seen) 807 808 def connect_doc(self, doc): 809 super().connect_doc(doc) 810 if doc: 811 for f in self.features: 812 doc.connect_feature(f) 813 814 815class QAPISchemaVariant(QAPISchemaObjectTypeMember): 816 role = 'branch' 817 818 def __init__(self, name, info, typ, ifcond=None): 819 super().__init__(name, info, typ, False, ifcond) 820 821 822class QAPISchemaCommand(QAPISchemaDefinition): 823 meta = 'command' 824 825 def __init__(self, name, info, doc, ifcond, features, 826 arg_type, ret_type, 827 gen, success_response, boxed, allow_oob, allow_preconfig, 828 coroutine): 829 super().__init__(name, info, doc, ifcond, features) 830 assert not arg_type or isinstance(arg_type, str) 831 assert not ret_type or isinstance(ret_type, str) 832 self._arg_type_name = arg_type 833 self.arg_type = None 834 self._ret_type_name = ret_type 835 self.ret_type = None 836 self.gen = gen 837 self.success_response = success_response 838 self.boxed = boxed 839 self.allow_oob = allow_oob 840 self.allow_preconfig = allow_preconfig 841 self.coroutine = coroutine 842 843 def check(self, schema): 844 super().check(schema) 845 if self._arg_type_name: 846 self.arg_type = schema.resolve_type( 847 self._arg_type_name, self.info, "command's 'data'") 848 if not isinstance(self.arg_type, QAPISchemaObjectType): 849 raise QAPISemError( 850 self.info, 851 "command's 'data' cannot take %s" 852 % self.arg_type.describe()) 853 if self.arg_type.variants and not self.boxed: 854 raise QAPISemError( 855 self.info, 856 "command's 'data' can take %s only with 'boxed': true" 857 % self.arg_type.describe()) 858 self.arg_type.check(schema) 859 if self.arg_type.has_conditional_members() and not self.boxed: 860 raise QAPISemError( 861 self.info, 862 "conditional command arguments require 'boxed': true") 863 if self._ret_type_name: 864 self.ret_type = schema.resolve_type( 865 self._ret_type_name, self.info, "command's 'returns'") 866 if self.name not in self.info.pragma.command_returns_exceptions: 867 typ = self.ret_type 868 if isinstance(typ, QAPISchemaArrayType): 869 typ = self.ret_type.element_type 870 assert typ 871 if not isinstance(typ, QAPISchemaObjectType): 872 raise QAPISemError( 873 self.info, 874 "command's 'returns' cannot take %s" 875 % self.ret_type.describe()) 876 877 def connect_doc(self, doc=None): 878 super().connect_doc(doc) 879 doc = doc or self.doc 880 if doc: 881 if self.arg_type and self.arg_type.is_implicit(): 882 self.arg_type.connect_doc(doc) 883 884 def visit(self, visitor): 885 super().visit(visitor) 886 visitor.visit_command( 887 self.name, self.info, self.ifcond, self.features, 888 self.arg_type, self.ret_type, self.gen, self.success_response, 889 self.boxed, self.allow_oob, self.allow_preconfig, 890 self.coroutine) 891 892 893class QAPISchemaEvent(QAPISchemaDefinition): 894 meta = 'event' 895 896 def __init__(self, name, info, doc, ifcond, features, arg_type, boxed): 897 super().__init__(name, info, doc, ifcond, features) 898 assert not arg_type or isinstance(arg_type, str) 899 self._arg_type_name = arg_type 900 self.arg_type = None 901 self.boxed = boxed 902 903 def check(self, schema): 904 super().check(schema) 905 if self._arg_type_name: 906 self.arg_type = schema.resolve_type( 907 self._arg_type_name, self.info, "event's 'data'") 908 if not isinstance(self.arg_type, QAPISchemaObjectType): 909 raise QAPISemError( 910 self.info, 911 "event's 'data' cannot take %s" 912 % self.arg_type.describe()) 913 if self.arg_type.variants and not self.boxed: 914 raise QAPISemError( 915 self.info, 916 "event's 'data' can take %s only with 'boxed': true" 917 % self.arg_type.describe()) 918 self.arg_type.check(schema) 919 if self.arg_type.has_conditional_members() and not self.boxed: 920 raise QAPISemError( 921 self.info, 922 "conditional event arguments require 'boxed': true") 923 924 def connect_doc(self, doc=None): 925 super().connect_doc(doc) 926 doc = doc or self.doc 927 if doc: 928 if self.arg_type and self.arg_type.is_implicit(): 929 self.arg_type.connect_doc(doc) 930 931 def visit(self, visitor): 932 super().visit(visitor) 933 visitor.visit_event( 934 self.name, self.info, self.ifcond, self.features, 935 self.arg_type, self.boxed) 936 937 938class QAPISchema: 939 def __init__(self, fname): 940 self.fname = fname 941 942 try: 943 parser = QAPISchemaParser(fname) 944 except OSError as err: 945 raise QAPIError( 946 f"can't read schema file '{fname}': {err.strerror}" 947 ) from err 948 949 exprs = check_exprs(parser.exprs) 950 self.docs = parser.docs 951 self._entity_list = [] 952 self._entity_dict = {} 953 self._module_dict = OrderedDict() 954 self._schema_dir = os.path.dirname(fname) 955 self._make_module(QAPISchemaModule.BUILTIN_MODULE_NAME) 956 self._make_module(fname) 957 self._predefining = True 958 self._def_predefineds() 959 self._predefining = False 960 self._def_exprs(exprs) 961 self.check() 962 963 def _def_entity(self, ent): 964 self._entity_list.append(ent) 965 966 def _def_definition(self, defn): 967 # Only the predefined types are allowed to not have info 968 assert defn.info or self._predefining 969 self._def_entity(defn) 970 # TODO reject names that differ only in '_' vs. '.' vs. '-', 971 # because they're liable to clash in generated C. 972 other_defn = self._entity_dict.get(defn.name) 973 if other_defn: 974 if other_defn.info: 975 where = QAPISourceError(other_defn.info, "previous definition") 976 raise QAPISemError( 977 defn.info, 978 "'%s' is already defined\n%s" % (defn.name, where)) 979 raise QAPISemError( 980 defn.info, "%s is already defined" % other_defn.describe()) 981 self._entity_dict[defn.name] = defn 982 983 def lookup_entity(self, name, typ=None): 984 ent = self._entity_dict.get(name) 985 if typ and not isinstance(ent, typ): 986 return None 987 return ent 988 989 def lookup_type(self, name): 990 return self.lookup_entity(name, QAPISchemaType) 991 992 def resolve_type(self, name, info, what): 993 typ = self.lookup_type(name) 994 if not typ: 995 if callable(what): 996 what = what(info) 997 raise QAPISemError( 998 info, "%s uses unknown type '%s'" % (what, name)) 999 return typ 1000 1001 def _module_name(self, fname: str) -> str: 1002 if QAPISchemaModule.is_system_module(fname): 1003 return fname 1004 return os.path.relpath(fname, self._schema_dir) 1005 1006 def _make_module(self, fname): 1007 name = self._module_name(fname) 1008 if name not in self._module_dict: 1009 self._module_dict[name] = QAPISchemaModule(name) 1010 return self._module_dict[name] 1011 1012 def module_by_fname(self, fname): 1013 name = self._module_name(fname) 1014 return self._module_dict[name] 1015 1016 def _def_include(self, expr: QAPIExpression): 1017 include = expr['include'] 1018 assert expr.doc is None 1019 self._def_entity( 1020 QAPISchemaInclude(self._make_module(include), expr.info)) 1021 1022 def _def_builtin_type(self, name, json_type, c_type): 1023 self._def_definition(QAPISchemaBuiltinType(name, json_type, c_type)) 1024 # Instantiating only the arrays that are actually used would 1025 # be nice, but we can't as long as their generated code 1026 # (qapi-builtin-types.[ch]) may be shared by some other 1027 # schema. 1028 self._make_array_type(name, None) 1029 1030 def _def_predefineds(self): 1031 for t in [('str', 'string', 'char' + POINTER_SUFFIX), 1032 ('number', 'number', 'double'), 1033 ('int', 'int', 'int64_t'), 1034 ('int8', 'int', 'int8_t'), 1035 ('int16', 'int', 'int16_t'), 1036 ('int32', 'int', 'int32_t'), 1037 ('int64', 'int', 'int64_t'), 1038 ('uint8', 'int', 'uint8_t'), 1039 ('uint16', 'int', 'uint16_t'), 1040 ('uint32', 'int', 'uint32_t'), 1041 ('uint64', 'int', 'uint64_t'), 1042 ('size', 'int', 'uint64_t'), 1043 ('bool', 'boolean', 'bool'), 1044 ('any', 'value', 'QObject' + POINTER_SUFFIX), 1045 ('null', 'null', 'QNull' + POINTER_SUFFIX)]: 1046 self._def_builtin_type(*t) 1047 self.the_empty_object_type = QAPISchemaObjectType( 1048 'q_empty', None, None, None, None, None, [], None) 1049 self._def_definition(self.the_empty_object_type) 1050 1051 qtypes = ['none', 'qnull', 'qnum', 'qstring', 'qdict', 'qlist', 1052 'qbool'] 1053 qtype_values = self._make_enum_members( 1054 [{'name': n} for n in qtypes], None) 1055 1056 self._def_definition(QAPISchemaEnumType( 1057 'QType', None, None, None, None, qtype_values, 'QTYPE')) 1058 1059 def _make_features(self, features, info): 1060 if features is None: 1061 return [] 1062 return [QAPISchemaFeature(f['name'], info, 1063 QAPISchemaIfCond(f.get('if'))) 1064 for f in features] 1065 1066 def _make_enum_member(self, name, ifcond, features, info): 1067 return QAPISchemaEnumMember(name, info, 1068 QAPISchemaIfCond(ifcond), 1069 self._make_features(features, info)) 1070 1071 def _make_enum_members(self, values, info): 1072 return [self._make_enum_member(v['name'], v.get('if'), 1073 v.get('features'), info) 1074 for v in values] 1075 1076 def _make_array_type(self, element_type, info): 1077 name = element_type + 'List' # reserved by check_defn_name_str() 1078 if not self.lookup_type(name): 1079 self._def_definition(QAPISchemaArrayType( 1080 name, info, element_type)) 1081 return name 1082 1083 def _make_implicit_object_type(self, name, info, ifcond, role, members): 1084 if not members: 1085 return None 1086 # See also QAPISchemaObjectTypeMember.describe() 1087 name = 'q_obj_%s-%s' % (name, role) 1088 typ = self.lookup_entity(name, QAPISchemaObjectType) 1089 if typ: 1090 # The implicit object type has multiple users. This can 1091 # only be a duplicate definition, which will be flagged 1092 # later. 1093 pass 1094 else: 1095 self._def_definition(QAPISchemaObjectType( 1096 name, info, None, ifcond, None, None, members, None)) 1097 return name 1098 1099 def _def_enum_type(self, expr: QAPIExpression): 1100 name = expr['enum'] 1101 data = expr['data'] 1102 prefix = expr.get('prefix') 1103 ifcond = QAPISchemaIfCond(expr.get('if')) 1104 info = expr.info 1105 features = self._make_features(expr.get('features'), info) 1106 self._def_definition(QAPISchemaEnumType( 1107 name, info, expr.doc, ifcond, features, 1108 self._make_enum_members(data, info), prefix)) 1109 1110 def _make_member(self, name, typ, ifcond, features, info): 1111 optional = False 1112 if name.startswith('*'): 1113 name = name[1:] 1114 optional = True 1115 if isinstance(typ, list): 1116 assert len(typ) == 1 1117 typ = self._make_array_type(typ[0], info) 1118 return QAPISchemaObjectTypeMember(name, info, typ, optional, ifcond, 1119 self._make_features(features, info)) 1120 1121 def _make_members(self, data, info): 1122 return [self._make_member(key, value['type'], 1123 QAPISchemaIfCond(value.get('if')), 1124 value.get('features'), info) 1125 for (key, value) in data.items()] 1126 1127 def _def_struct_type(self, expr: QAPIExpression): 1128 name = expr['struct'] 1129 base = expr.get('base') 1130 data = expr['data'] 1131 info = expr.info 1132 ifcond = QAPISchemaIfCond(expr.get('if')) 1133 features = self._make_features(expr.get('features'), info) 1134 self._def_definition(QAPISchemaObjectType( 1135 name, info, expr.doc, ifcond, features, base, 1136 self._make_members(data, info), 1137 None)) 1138 1139 def _make_variant(self, case, typ, ifcond, info): 1140 if isinstance(typ, list): 1141 assert len(typ) == 1 1142 typ = self._make_array_type(typ[0], info) 1143 return QAPISchemaVariant(case, info, typ, ifcond) 1144 1145 def _def_union_type(self, expr: QAPIExpression): 1146 name = expr['union'] 1147 base = expr['base'] 1148 tag_name = expr['discriminator'] 1149 data = expr['data'] 1150 assert isinstance(data, dict) 1151 info = expr.info 1152 ifcond = QAPISchemaIfCond(expr.get('if')) 1153 features = self._make_features(expr.get('features'), info) 1154 if isinstance(base, dict): 1155 base = self._make_implicit_object_type( 1156 name, info, ifcond, 1157 'base', self._make_members(base, info)) 1158 variants = [ 1159 self._make_variant(key, value['type'], 1160 QAPISchemaIfCond(value.get('if')), 1161 info) 1162 for (key, value) in data.items()] 1163 members: List[QAPISchemaObjectTypeMember] = [] 1164 self._def_definition( 1165 QAPISchemaObjectType(name, info, expr.doc, ifcond, features, 1166 base, members, 1167 QAPISchemaVariants( 1168 tag_name, info, None, variants))) 1169 1170 def _def_alternate_type(self, expr: QAPIExpression): 1171 name = expr['alternate'] 1172 data = expr['data'] 1173 assert isinstance(data, dict) 1174 ifcond = QAPISchemaIfCond(expr.get('if')) 1175 info = expr.info 1176 features = self._make_features(expr.get('features'), info) 1177 variants = [ 1178 self._make_variant(key, value['type'], 1179 QAPISchemaIfCond(value.get('if')), 1180 info) 1181 for (key, value) in data.items()] 1182 tag_member = QAPISchemaObjectTypeMember('type', info, 'QType', False) 1183 self._def_definition( 1184 QAPISchemaAlternateType( 1185 name, info, expr.doc, ifcond, features, 1186 QAPISchemaVariants(None, info, tag_member, variants))) 1187 1188 def _def_command(self, expr: QAPIExpression): 1189 name = expr['command'] 1190 data = expr.get('data') 1191 rets = expr.get('returns') 1192 gen = expr.get('gen', True) 1193 success_response = expr.get('success-response', True) 1194 boxed = expr.get('boxed', False) 1195 allow_oob = expr.get('allow-oob', False) 1196 allow_preconfig = expr.get('allow-preconfig', False) 1197 coroutine = expr.get('coroutine', False) 1198 ifcond = QAPISchemaIfCond(expr.get('if')) 1199 info = expr.info 1200 features = self._make_features(expr.get('features'), info) 1201 if isinstance(data, OrderedDict): 1202 data = self._make_implicit_object_type( 1203 name, info, ifcond, 1204 'arg', self._make_members(data, info)) 1205 if isinstance(rets, list): 1206 assert len(rets) == 1 1207 rets = self._make_array_type(rets[0], info) 1208 self._def_definition( 1209 QAPISchemaCommand(name, info, expr.doc, ifcond, features, data, 1210 rets, gen, success_response, boxed, allow_oob, 1211 allow_preconfig, coroutine)) 1212 1213 def _def_event(self, expr: QAPIExpression): 1214 name = expr['event'] 1215 data = expr.get('data') 1216 boxed = expr.get('boxed', False) 1217 ifcond = QAPISchemaIfCond(expr.get('if')) 1218 info = expr.info 1219 features = self._make_features(expr.get('features'), info) 1220 if isinstance(data, OrderedDict): 1221 data = self._make_implicit_object_type( 1222 name, info, ifcond, 1223 'arg', self._make_members(data, info)) 1224 self._def_definition(QAPISchemaEvent(name, info, expr.doc, ifcond, 1225 features, data, boxed)) 1226 1227 def _def_exprs(self, exprs): 1228 for expr in exprs: 1229 if 'enum' in expr: 1230 self._def_enum_type(expr) 1231 elif 'struct' in expr: 1232 self._def_struct_type(expr) 1233 elif 'union' in expr: 1234 self._def_union_type(expr) 1235 elif 'alternate' in expr: 1236 self._def_alternate_type(expr) 1237 elif 'command' in expr: 1238 self._def_command(expr) 1239 elif 'event' in expr: 1240 self._def_event(expr) 1241 elif 'include' in expr: 1242 self._def_include(expr) 1243 else: 1244 assert False 1245 1246 def check(self): 1247 for ent in self._entity_list: 1248 ent.check(self) 1249 ent.connect_doc() 1250 for ent in self._entity_list: 1251 ent.set_module(self) 1252 for doc in self.docs: 1253 doc.check() 1254 1255 def visit(self, visitor): 1256 visitor.visit_begin(self) 1257 for mod in self._module_dict.values(): 1258 mod.visit(visitor) 1259 visitor.visit_end() 1260