giscanner/ast.py

   1 # -*- Mode: Python -*-
   2 # GObject-Introspection - a framework for introspecting GObject libraries
   3 # Copyright (C) 2008  Johan Dahlin
   4 # Copyright (C) 2008, 2009 Red Hat, Inc.
   5 #
   6 # This library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Lesser General Public
   8 # License as published by the Free Software Foundation; either
   9 # version 2 of the License, or (at your option) any later version.
  10 #
  11 # This library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Lesser General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU Lesser General Public
  17 # License along with this library; if not, write to the
  18 # Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 # Boston, MA 02111-1307, USA.
  20 #
  21
  22 from .odict import odict
  23 from .utils import to_underscores
  24
  25 class Type(object):
  26     """A Type can be either:
  27 * A reference to a node (target_giname)
  28 * A reference to a "fundamental" type like 'utf8'
  29 * A "foreign" type - this can be any string."
  30 If none are specified, then it's in an "unresolved" state.  An
  31 unresolved type can have two data sources; a "ctype" which comes
  32 from a C type string, or a gtype_name (from g_type_name()).
  33 """ # '''
  34
  35     def __init__(self,
  36                  ctype=None,
  37                  gtype_name=None,
  38                  target_fundamental=None,
  39                  target_giname=None,
  40                  target_foreign=None,
  41                  _target_unknown=False,
  42                  is_const=False,
  43                  origin_symbol=None):
  44         self.ctype = ctype
  45         self.gtype_name = gtype_name
  46         self.origin_symbol = origin_symbol
  47         if _target_unknown:
  48             assert isinstance(self, TypeUnknown)
  49         elif target_fundamental:
  50             assert target_giname is None
  51             assert target_foreign is None
  52         elif target_giname:
  53             assert '.' in target_giname
  54             assert target_fundamental is None
  55             assert target_foreign is None
  56         elif target_foreign:
  57             assert ctype is not None
  58             assert target_giname is None
  59             assert target_fundamental is None
  60         else:
  61             assert (ctype is not None) or (gtype_name is not None)
  62         self.target_fundamental = target_fundamental
  63         self.target_giname = target_giname
  64         self.target_foreign = target_foreign
  65         self.is_const = is_const
  66
  67     @property
  68     def resolved(self):
  69         return (self.target_fundamental or
  70                 self.target_giname or
  71                 self.target_foreign)
  72
  73     @property
  74     def unresolved_string(self):
  75         if self.ctype:
  76             return self.ctype
  77         elif self.gtype_name:
  78             return self.gtype_name
  79         else:
  80             assert False
  81
  82     @classmethod
  83     def create_from_gtype_name(cls, gtype_name):
  84         """Parse a GType name (as from g_type_name()), and return a
  85 Type instance.  Note that this function performs namespace lookup,
  86 in contrast to the other create_type() functions."""
  87         # First, is it a fundamental?
  88         fundamental = type_names.get(gtype_name)
  89         if fundamental is not None:
  90             return cls(target_fundamental=fundamental.target_fundamental)
  91         return cls(gtype_name=gtype_name)
  92
  93     def get_giname(self):
  94         assert self.target_giname is not None
  95         return self.target_giname.split('.')[1]
  96
  97     def __cmp__(self, other):
  98         if self.target_fundamental:
  99             return cmp(self.target_fundamental, other.target_fundamental)
 100         if self.target_giname:
 101             return cmp(self.target_giname, other.target_giname)
 102         if self.target_foreign:
 103             return cmp(self.target_foreign, other.target_foreign)
 104         return cmp(self.ctype, other.ctype)
 105
 106     def is_equiv(self, typeval):
 107         """Return True if the specified types are compatible at
 108         an introspection level, disregarding their C types.
 109         A sequence may be given for typeval, in which case
 110         this function returns True if the type is compatible with
 111         any."""
 112         if isinstance(typeval, (list, tuple)):
 113             for val in typeval:
 114                 if self.is_equiv(val):
 115                     return True
 116             return False
 117         return self == typeval
 118
 119     def clone(self):
 120         return Type(target_fundamental=self.target_fundamental,
 121                     target_giname=self.target_giname,
 122                     target_foreign=self.target_foreign,
 123                     ctype=self.ctype,
 124                     is_const=self.is_const)
 125
 126     def __str__(self):
 127         if self.target_fundamental:
 128             return self.target_fundamental
 129         elif self.target_giname:
 130             return self.target_giname
 131         elif self.target_foreign:
 132             return self.target_foreign
 133
 134     def __repr__(self):
 135         if self.target_fundamental:
 136             data = 'target_fundamental=%s, ' % (self.target_fundamental, )
 137         elif self.target_giname:
 138             data = 'target_giname=%s, ' % (self.target_giname, )
 139         elif self.target_foreign:
 140             data = 'target_foreign=%s, ' % (self.target_foreign, )
 141         else:
 142             data = ''
 143         return '%s(%sctype=%s)' % (self.__class__.__name__, data, self.ctype)
 144
 145 class TypeUnknown(Type):
 146     def __init__(self):
 147         Type.__init__(self, _target_unknown=True)
 148
 149 ######
 150 ## Fundamental types
 151 ######
 152 # Two special ones
 153 TYPE_NONE = Type(target_fundamental='none', ctype='void')
 154 TYPE_ANY = Type(target_fundamental='gpointer', ctype='gpointer')
 155 # "Basic" types
 156 TYPE_BOOLEAN = Type(target_fundamental='gboolean', ctype='gboolean')
 157 TYPE_INT8 = Type(target_fundamental='gint8', ctype='gint8')
 158 TYPE_UINT8 = Type(target_fundamental='guint8', ctype='guint8')
 159 TYPE_INT16 = Type(target_fundamental='gint16', ctype='gint16')
 160 TYPE_UINT16 = Type(target_fundamental='guint16', ctype='guint16')
 161 TYPE_INT32 = Type(target_fundamental='gint32', ctype='gint32')
 162 TYPE_UINT32 = Type(target_fundamental='guint32', ctype='guint32')
 163 TYPE_INT64 = Type(target_fundamental='gint64', ctype='gint64')
 164 TYPE_UINT64 = Type(target_fundamental='guint64', ctype='guint64')
 165 TYPE_CHAR = Type(target_fundamental='gchar', ctype='gchar')
 166 TYPE_SHORT = Type(target_fundamental='gshort', ctype='gshort')
 167 TYPE_USHORT = Type(target_fundamental='gushort', ctype='gushort')
 168 TYPE_INT = Type(target_fundamental='gint', ctype='gint')
 169 TYPE_UINT = Type(target_fundamental='guint', ctype='guint')
 170 TYPE_LONG = Type(target_fundamental='glong', ctype='glong')
 171 TYPE_ULONG = Type(target_fundamental='gulong', ctype='gulong')
 172 # C99 types
 173 TYPE_LONG_LONG = Type(target_fundamental='long long', ctype='long long')
 174 TYPE_LONG_ULONG = Type(target_fundamental='unsigned long long',
 175                        ctype='unsigned long long')
 176 TYPE_FLOAT = Type(target_fundamental='gfloat', ctype='gfloat')
 177 TYPE_DOUBLE = Type(target_fundamental='gdouble', ctype='gdouble')
 178 # ?
 179 TYPE_LONG_DOUBLE = Type(target_fundamental='long double',
 180                         ctype='long double')
 181 TYPE_UNICHAR = Type(target_fundamental='gunichar', ctype='gunichar')
 182
 183 # C types with semantics overlaid
 184 TYPE_GTYPE = Type(target_fundamental='GType', ctype='GType')
 185 TYPE_STRING = Type(target_fundamental='utf8', ctype='gchar*')
 186 TYPE_FILENAME = Type(target_fundamental='filename', ctype='gchar*')
 187
 188 TYPE_VALIST = Type(target_fundamental='va_list', ctype='va_list')
 189
 190 BASIC_GIR_TYPES = [TYPE_BOOLEAN, TYPE_INT8, TYPE_UINT8, TYPE_INT16,
 191                    TYPE_UINT16, TYPE_INT32, TYPE_UINT32, TYPE_INT64,
 192                    TYPE_UINT64, TYPE_CHAR, TYPE_SHORT, TYPE_USHORT, TYPE_INT,
 193                    TYPE_UINT, TYPE_LONG, TYPE_ULONG, TYPE_LONG_LONG,
 194                    TYPE_LONG_ULONG, TYPE_FLOAT, TYPE_DOUBLE,
 195                    TYPE_LONG_DOUBLE, TYPE_UNICHAR, TYPE_GTYPE]
 196 GIR_TYPES = [TYPE_NONE, TYPE_ANY]
 197 GIR_TYPES.extend(BASIC_GIR_TYPES)
 198 GIR_TYPES.extend([TYPE_STRING, TYPE_FILENAME, TYPE_VALIST])
 199
 200 INTROSPECTABLE_BASIC = list(GIR_TYPES)
 201 for v in [TYPE_NONE, TYPE_ANY,
 202           TYPE_LONG_LONG, TYPE_LONG_ULONG,
 203           TYPE_LONG_DOUBLE, TYPE_VALIST]:
 204     INTROSPECTABLE_BASIC.remove(v)
 205
 206 type_names = {}
 207 for typeval in GIR_TYPES:
 208     type_names[typeval.target_fundamental] = typeval
 209 basic_type_names = {}
 210 for typeval in BASIC_GIR_TYPES:
 211     basic_type_names[typeval.target_fundamental] = typeval
 212
 213 # C builtin
 214 type_names['char'] = TYPE_CHAR
 215 type_names['signed char'] = TYPE_INT8
 216 type_names['unsigned char'] = TYPE_UINT8
 217 type_names['short'] = TYPE_SHORT
 218 type_names['signed short'] = TYPE_SHORT
 219 type_names['unsigned short'] = TYPE_USHORT
 220 type_names['int'] = TYPE_INT
 221 type_names['signed int'] = TYPE_INT
 222 type_names['unsigned short int'] = TYPE_USHORT
 223 type_names['signed'] = TYPE_INT
 224 type_names['unsigned int'] = TYPE_UINT
 225 type_names['unsigned'] = TYPE_UINT
 226 type_names['long'] = TYPE_LONG
 227 type_names['signed long'] = TYPE_LONG
 228 type_names['unsigned long'] = TYPE_ULONG
 229 type_names['unsigned long int'] = TYPE_ULONG
 230 type_names['float'] = TYPE_FLOAT
 231 type_names['double'] = TYPE_DOUBLE
 232 type_names['char*'] = TYPE_STRING
 233 type_names['void*'] = TYPE_ANY
 234 type_names['void'] = TYPE_NONE
 235 # Also alias the signed one here
 236 type_names['signed long long'] = TYPE_LONG_LONG
 237
 238 # A few additional GLib type aliases
 239 type_names['guchar'] = TYPE_UINT8
 240 type_names['gchararray'] = TYPE_STRING
 241 type_names['gchar*'] = TYPE_STRING
 242 type_names['goffset'] = TYPE_INT64
 243 type_names['gunichar2'] = TYPE_UINT16
 244 type_names['gsize'] = TYPE_ULONG
 245 type_names['gssize'] = TYPE_LONG
 246 type_names['gconstpointer'] = TYPE_ANY
 247
 248 # We used to support these; continue to do so
 249 type_names['any'] = TYPE_ANY
 250 type_names['boolean'] = TYPE_BOOLEAN
 251 type_names['uint'] = TYPE_UINT
 252 type_names['ulong'] = TYPE_ULONG
 253
 254 # C stdio, used in GLib public headers; squash this for now here
 255 # until we move scanning into GLib and can (skip)
 256 type_names['FILE*'] = TYPE_ANY
 257
 258 # One off C unix type definitions; note some of these may be GNU Libc
 259 # specific.  If someone is actually bitten by this, feel free to do
 260 # the required configure goop to determine their size and replace
 261 # here.
 262 #
 263 # We don't want to encourage people to use these in their APIs because
 264 # they compromise the platform-independence that GLib gives you.
 265 # These are here mostly to avoid blowing when random platform-specific
 266 # methods are added under #ifdefs inside GLib itself.  We could just (skip)
 267 # the relevant methods, but on the other hand, since these types are just
 268 # integers it's easy enough to expand them.
 269 type_names['size_t'] = type_names['gsize']
 270 type_names['time_t'] = TYPE_LONG
 271 type_names['off_t'] = type_names['gsize']
 272 type_names['pid_t'] = TYPE_INT
 273 type_names['uid_t'] = TYPE_UINT
 274 type_names['gid_t'] = TYPE_UINT
 275 type_names['dev_t'] = TYPE_INT
 276 type_names['socklen_t'] = TYPE_INT32
 277 type_names['size_t'] = TYPE_ULONG
 278 type_names['ssize_t'] = TYPE_LONG
 279
 280 # Obj-C
 281 type_names['id'] = TYPE_ANY
 282
 283 ##
 284 ## Parameters
 285 ##
 286
 287 PARAM_DIRECTION_IN = 'in'
 288 PARAM_DIRECTION_OUT = 'out'
 289 PARAM_DIRECTION_INOUT = 'inout'
 290
 291 PARAM_SCOPE_CALL = 'call'
 292 PARAM_SCOPE_ASYNC = 'async'
 293 PARAM_SCOPE_NOTIFIED = 'notified'
 294
 295 PARAM_TRANSFER_NONE = 'none'
 296 PARAM_TRANSFER_CONTAINER = 'container'
 297 PARAM_TRANSFER_FULL = 'full'
 298
 299 class Namespace(object):
 300     def __init__(self, name, version,
 301                  identifier_prefixes=None,
 302                  symbol_prefixes=None):
 303         self.name = name
 304         self.version = version
 305         if identifier_prefixes is not None:
 306             self.identifier_prefixes = identifier_prefixes
 307         else:
 308             self.identifier_prefixes = [name]
 309         if symbol_prefixes is not None:
 310             self.symbol_prefixes = symbol_prefixes
 311         else:
 312             ps = self.identifier_prefixes
 313             self.symbol_prefixes = [to_underscores(p).lower() for p in ps]
 314         self._names = odict() # Maps from GIName -> node
 315         self._aliases = {} # Maps from GIName -> GIName
 316         self._type_names = {} # Maps from GTName -> node
 317         self._ctypes = {} # Maps from CType -> node
 318         self._symbols = {} # Maps from function symbols -> Function
 319
 320     @property
 321     def names(self):
 322         return self._names
 323
 324     @property
 325     def aliases(self):
 326         return self._aliases
 327
 328     @property
 329     def type_names(self):
 330         return self._type_names
 331
 332     @property
 333     def ctypes(self):
 334         return self._ctypes
 335
 336     def type_from_name(self, name, ctype=None):
 337         """Backwards compatibility method for older .gir files, which
 338 only use the 'name' attribute.  If name refers to a fundamental type,
 339 create a Type object referncing it.  If name is already a
 340 fully-qualified GIName like 'Foo.Bar', returns a Type targeting it .
 341 Otherwise a Type targeting name qualififed with the namespace name is
 342 returned."""
 343         if name in type_names:
 344             return Type(target_fundamental=name, ctype=ctype)
 345         if '.' in name:
 346             target = name
 347         else:
 348             target = '%s.%s' % (self.name, name)
 349         return Type(target_giname=target, ctype=ctype)
 350
 351     def append(self, node, replace=False):
 352         previous = self._names.get(node.name)
 353         if previous is not None:
 354             if not replace:
 355                 raise ValueError("Namespace conflict: %r" % (node, ))
 356             self.remove(previous)
 357         # A layering violation...but oh well.
 358         from .glibast import GLibBoxed
 359         if isinstance(node, Alias):
 360             self._aliases[node.name] = node
 361         elif isinstance(node, (GLibBoxed, Interface, Class)):
 362             self._type_names[node.type_name] = node
 363         elif isinstance(node, Function):
 364             self._symbols[node.symbol] = node
 365         assert isinstance(node, Node)
 366         assert node.namespace is None
 367         node.namespace = self
 368         self._names[node.name] = node
 369         if hasattr(node, 'ctype'):
 370             self._ctypes[node.ctype] = node
 371         if hasattr(node, 'symbol'):
 372             self._ctypes[node.symbol] = node
 373
 374     def remove(self, node):
 375         from .glibast import GLibBoxed
 376         if isinstance(node, Alias):
 377             del self._aliases[node.name]
 378         elif isinstance(node, (GLibBoxed, Interface, Class)):
 379             del self._type_names[node.type_name]
 380         del self._names[node.name]
 381         node.namespace = None
 382         if hasattr(node, 'ctype'):
 383             del self._ctypes[node.ctype]
 384         if isinstance(node, Function):
 385             del self._symbols[node.symbol]
 386
 387     def float(self, node):
 388         """Like remove(), but doesn't unset the node's namespace
 389 back-reference, and it's still possible to look up
 390 functions via get_by_symbol()."""
 391         if isinstance(node, Function):
 392             symbol = node.symbol
 393         self.remove(node)
 394         self._symbols[symbol] = node
 395         node.namespace = self
 396
 397     def __iter__(self):
 398         return iter(self._names)
 399
 400     def iteritems(self):
 401         return self._names.iteritems()
 402
 403     def itervalues(self):
 404         return self._names.itervalues()
 405
 406     def get(self, name):
 407         return self._names.get(name)
 408
 409     def get_by_ctype(self, ctype):
 410         return self._ctypes.get(ctype)
 411
 412     def get_by_symbol(self, symbol):
 413         return self._symbols.get(symbol)
 414
 415     def walk(self, callback):
 416         for node in self.itervalues():
 417             node.walk(callback, [])
 418
 419 class Include(object):
 420
 421     def __init__(self, name, version):
 422         self.name = name
 423         self.version = version
 424
 425     @classmethod
 426     def from_string(cls, string):
 427         return cls(*string.split('-', 1))
 428
 429     def __cmp__(self, other):
 430         namecmp = cmp(self.name, other.name)
 431         if namecmp != 0:
 432             return namecmp
 433         return cmp(self.version, other.version)
 434
 435     def __hash__(self):
 436         return hash(str(self))
 437
 438     def __str__(self):
 439         return '%s-%s' % (self.name, self.version)
 440
 441 class Annotated(object):
 442     """An object which has a few generic metadata
 443 properties."""
 444     def __init__(self):
 445         self.version = None
 446         self.skip = False
 447         self.introspectable = True
 448         self.attributes = [] # (key, value)*
 449         self.deprecated = None
 450         self.deprecated_version = None
 451         self.doc = None
 452
 453 class Node(Annotated):
 454     """A node is a type of object which is uniquely identified by its
 455 (namespace, name) pair.  When combined with a ., this is called a
 456 GIName.  It's possible for nodes to contain or point to other nodes."""
 457
 458     c_name = property(lambda self: self.namespace.name + self.name)
 459     gi_name = property(lambda self: '%s.%s' % (self.namespace.name, self.name))
 460
 461     def __init__(self, name=None):
 462         Annotated.__init__(self)
 463         self.namespace = None # Should be set later by Namespace.append()
 464         self.name = name
 465         self.foreign = False
 466         self.file_positions = set()
 467
 468     def create_type(self):
 469         """Create a Type object referencing this node."""
 470         assert self.namespace is not None
 471         return Type(target_giname=('%s.%s' % (self.namespace.name, self.name)))
 472
 473     def __cmp__(self, other):
 474         nscmp = cmp(self.namespace, other.namespace)
 475         if nscmp != 0:
 476             return nscmp
 477         return cmp(self.name, other.name)
 478
 479     def __repr__(self):
 480         return '%s(%r)' % (self.__class__.__name__, self.name)
 481
 482     def inherit_file_positions(self, node):
 483         self.file_positions.update(node.file_positions)
 484
 485     def add_file_position(self, filename, line, column):
 486         self.file_positions.add((filename, line, column))
 487
 488     def add_symbol_reference(self, symbol):
 489         if symbol.source_filename:
 490             self.add_file_position(symbol.source_filename, symbol.line, -1)
 491
 492     def walk(self, callback, chain):
 493         res = callback(self, chain)
 494         assert res in (True, False), "Walk function must return boolean, not %r" % (res, )
 495         if not res:
 496             return False
 497         chain.append(self)
 498         self._walk(callback, chain)
 499         chain.pop()
 500
 501     def _walk(self, callback, chain):
 502         pass
 503
 504 class Callable(Node):
 505
 506     def __init__(self, name, retval, parameters, throws):
 507         Node.__init__(self, name)
 508         self.retval = retval
 509         self.parameters = parameters
 510         self.throws = not not throws
 511
 512     def get_parameter_index(self, name):
 513         for i, parameter in enumerate(self.parameters):
 514             if parameter.argname == name:
 515                 return i
 516         raise ValueError("Unknown argument %s" % (name, ))
 517
 518     def get_parameter(self, name):
 519         for parameter in self.parameters:
 520             if parameter.argname == name:
 521                 return parameter
 522         raise ValueError("Unknown argument %s" % (name, ))
 523
 524
 525 class Function(Callable):
 526
 527     def __init__(self, name, retval, parameters, throws, symbol):
 528         Callable.__init__(self, name, retval, parameters, throws)
 529         self.symbol = symbol
 530         self.is_method = False
 531         self.is_constructor = False
 532         self.shadowed_by = None # C symbol string
 533         self.shadows = None # C symbol string
 534
 535
 536 class VFunction(Callable):
 537
 538     def __init__(self, name, retval, parameters, throws):
 539         Callable.__init__(self, name, retval, parameters, throws)
 540         self.invoker = None
 541
 542     @classmethod
 543     def from_callback(cls, cb):
 544         obj = cls(cb.name, cb.retval, cb.parameters[1:],
 545                   cb.throws)
 546         return obj
 547
 548
 549
 550 class Varargs(Type):
 551
 552     def __init__(self):
 553         Type.__init__(self, '<varargs>', target_fundamental='<varargs>')
 554
 555
 556 class Array(Type):
 557     C = '<c>'
 558     GLIB_ARRAY = 'GLib.Array'
 559     GLIB_BYTEARRAY = 'GLib.ByteArray'
 560     GLIB_PTRARRAY = 'GLib.PtrArray'
 561
 562     def __init__(self, array_type, element_type, **kwargs):
 563         Type.__init__(self, target_fundamental='<array>',
 564                       **kwargs)
 565         if (array_type is None or array_type == self.C):
 566             self.array_type = self.C
 567         else:
 568             assert array_type in (self.GLIB_ARRAY,
 569                                   self.GLIB_BYTEARRAY,
 570                                   self.GLIB_PTRARRAY)
 571             self.array_type = array_type
 572         assert isinstance(element_type, Type)
 573         self.element_type = element_type
 574         self.zeroterminated = True
 575         self.length_param_name = None
 576         self.size = None
 577
 578     def clone(self):
 579         arr = Array(self.array_type, self.element_type)
 580         arr.element_type = self.element_type
 581         arr.zeroterminated = self.zeroterminated
 582         arr.length_param_name = self.length_param_name
 583         arr.size = self.size
 584         return arr
 585
 586 class List(Type):
 587
 588     def __init__(self, name, element_type, **kwargs):
 589         Type.__init__(self, target_fundamental='<list>',
 590                       **kwargs)
 591         self.name = name
 592         assert isinstance(element_type, Type)
 593         self.element_type = element_type
 594
 595     def clone(self):
 596         l = List(self.name, self.element_type)
 597         l.element_type = self.element_type
 598         l.zeroterminated = self.zeroterminated
 599         l.length_param_name = self.length_param_name
 600         l.size = self.size
 601         return l
 602
 603 class Map(Type):
 604
 605     def __init__(self, key_type, value_type, **kwargs):
 606         Type.__init__(self, target_fundamental='<map>', **kwargs)
 607         assert isinstance(key_type, Type)
 608         self.key_type = key_type
 609         assert isinstance(value_type, Type)
 610         self.value_type = value_type
 611
 612     def clone(self):
 613         m = Map(self.key_type, self.value_type)
 614         return m
 615
 616 class Alias(Node):
 617
 618     def __init__(self, name, target, ctype=None):
 619         Node.__init__(self, name)
 620         self.target = target
 621         self.ctype = ctype
 622
 623
 624 class TypeContainer(Annotated):
 625     """A fundamental base class for Return and Parameter."""
 626
 627     def __init__(self, typenode, transfer):
 628         Annotated.__init__(self)
 629         self.type = typenode
 630         if transfer is not None:
 631             self.transfer = transfer
 632         elif typenode.is_const:
 633             self.transfer = PARAM_TRANSFER_NONE
 634         else:
 635             self.transfer = None
 636
 637
 638 class Parameter(TypeContainer):
 639     """An argument to a function."""
 640
 641     def __init__(self, argname, typenode, direction=None,
 642                  transfer=None, allow_none=False, scope=None,
 643                  caller_allocates=False):
 644         TypeContainer.__init__(self, typenode, transfer)
 645         self.argname = argname
 646         self.direction = direction
 647         self.allow_none = allow_none
 648         self.scope = scope
 649         self.caller_allocates = caller_allocates
 650         self.closure_name = None
 651         self.destroy_name = None
 652
 653
 654 class Return(TypeContainer):
 655     """A return value from a function."""
 656
 657     def __init__(self, rtype, transfer=None):
 658         TypeContainer.__init__(self, rtype, transfer)
 659         self.direction = PARAM_DIRECTION_OUT
 660
 661
 662 class Enum(Node):
 663
 664     def __init__(self, name, symbol, members):
 665         Node.__init__(self, name)
 666         self.symbol = symbol
 667         self.members = members
 668
 669
 670 class Bitfield(Node):
 671
 672     def __init__(self, name, symbol, members):
 673         Node.__init__(self, name)
 674         self.symbol = symbol
 675         self.members = members
 676
 677
 678 class Member(Annotated):
 679
 680     def __init__(self, name, value, symbol):
 681         Annotated.__init__(self)
 682         self.name = name
 683         self.value = value
 684         self.symbol = symbol
 685
 686     def __cmp__(self, other):
 687         return cmp(self.name, other.name)
 688
 689
 690 class Record(Node):
 691
 692     def __init__(self, name, symbol, disguised=False):
 693         Node.__init__(self, name)
 694         self.fields = []
 695         self.constructors = []
 696         self.symbol = symbol
 697         self.disguised = disguised
 698         self.methods = []
 699         self.static_methods = []
 700
 701     def _walk(self, callback, chain):
 702         for ctor in self.constructors:
 703             ctor.walk(callback, chain)
 704         for func in self.methods:
 705             func.walk(callback, chain)
 706         for func in self.static_methods:
 707             func.walk(callback, chain)
 708         for field in self.fields:
 709             if field.anonymous_node is not None:
 710                 field.anonymous_node.walk(callback, chain)
 711
 712
 713 class Field(Annotated):
 714
 715     def __init__(self, name, typenode, readable, writable, bits=None,
 716                  anonymous_node=None):
 717         Annotated.__init__(self)
 718         assert (typenode or anonymous_node)
 719         self.name = name
 720         self.type = typenode
 721         self.readable = readable
 722         self.writable = writable
 723         self.bits = bits
 724         self.anonymous_node = anonymous_node
 725
 726     def __cmp__(self, other):
 727         return cmp(self.name, other.name)
 728
 729
 730 class Class(Node):
 731
 732     def __init__(self, name, parent, is_abstract):
 733         Node.__init__(self, name)
 734         self.ctype = name
 735         self.c_symbol_prefix = None
 736         self.parent = parent
 737         # When we're in the scanner, we keep around a list
 738         # of parents so that we can transparently fall back
 739         # if there are 'hidden' parents
 740         self.parent_chain = []
 741         self.glib_type_struct = None
 742         self.is_abstract = is_abstract
 743         self.methods = []
 744         self.virtual_methods = []
 745         self.static_methods = []
 746         self.interfaces = []
 747         self.constructors = []
 748         self.properties = []
 749         self.fields = []
 750
 751     def _walk(self, callback, chain):
 752         for meth in self.methods:
 753             meth.walk(callback, chain)
 754         for meth in self.virtual_methods:
 755             meth.walk(callback, chain)
 756         for meth in self.static_methods:
 757             meth.walk(callback, chain)
 758         for ctor in self.constructors:
 759             ctor.walk(callback, chain)
 760         for field in self.fields:
 761             if field.anonymous_node:
 762                 field.anonymous_node.walk(callback, chain)
 763
 764 class Interface(Node):
 765
 766     def __init__(self, name, parent):
 767         Node.__init__(self, name)
 768         self.c_symbol_prefix = None
 769         self.parent = parent
 770         self.parent_chain = []
 771         self.methods = []
 772         self.static_methods = []
 773         self.virtual_methods = []
 774         self.glib_type_struct = None
 775         self.properties = []
 776         self.fields = []
 777         self.prerequisites = []
 778
 779     def _walk(self, callback, chain):
 780         for meth in self.methods:
 781             meth.walk(callback, chain)
 782         for meth in self.static_methods:
 783             meth.walk(callback, chain)
 784         for meth in self.virtual_methods:
 785             meth.walk(callback, chain)
 786         for field in self.fields:
 787             if field.anonymous_node:
 788                 field.anonymous_node.walk(callback, chain)
 789
 790 class Constant(Node):
 791
 792     def __init__(self, name, value_type, value):
 793         Node.__init__(self, name)
 794         self.value_type = value_type
 795         self.value = value
 796
 797
 798 class Property(Node):
 799
 800     def __init__(self, name, typeobj, readable, writable,
 801                  construct, construct_only, transfer=None):
 802         Node.__init__(self, name)
 803         self.type = typeobj
 804         self.readable = readable
 805         self.writable = writable
 806         self.construct = construct
 807         self.construct_only = construct_only
 808         self.transfer = PARAM_TRANSFER_NONE
 809
 810
 811 class Callback(Callable):
 812
 813     def __init__(self, name, retval, parameters, throws, ctype=None):
 814         Callable.__init__(self, name, retval, parameters, throws)
 815         self.ctype = ctype
 816
 817
 818 class Union(Node):
 819
 820     def __init__(self, name, symbol):
 821         Node.__init__(self, name)
 822         self.fields = []
 823         self.constructors = []
 824         self.methods = []
 825         self.static_methods = []
 826         self.symbol = symbol
 827
 828     def _walk(self, callback, chain):
 829         for ctor in self.constructors:
 830             ctor.walk(callback, chain)
 831         for meth in self.methods:
 832             meth.walk(callback, chain)
 833         for meth in self.static_methods:
 834             meth.walk(callback, chain)
 835         for field in self.fields:
 836             if field.anonymous_node:
 837                 field.anonymous_node.walk(callback, chain)