2 # GObject-Introspection - a framework for introspecting GObject libraries
3 # Copyright (C) 2008 Johan Dahlin
5 # This library is free software; you can redistribute it and/or
6 # modify it under the terms of the GNU Lesser General Public
7 # License as published by the Free Software Foundation; either
8 # version 2 of the License, or (at your option) any later version.
10 # This library is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # Lesser General Public License for more details.
15 # You should have received a copy of the GNU Lesser General Public
16 # License along with this library; if not, write to the
17 # Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 # Boston, MA 02111-1307, USA.
24 from .ast import (Bitfield, Callback, Enum, Function, Namespace, Member,
25 Parameter, Return, Struct, Field,
26 Type, Array, Alias, Interface, Class, Node, Union,
27 Varargs, Constant, type_name_from_ctype,
28 type_names, TYPE_STRING, BASIC_GIR_TYPES)
29 from .config import DATADIR, GIR_DIR, GIR_SUFFIX
30 from .glibast import GLibBoxed
31 from .girparser import GIRParser
32 from .odict import odict
33 from .sourcescanner import (
34 SourceSymbol, ctype_name, CTYPE_POINTER,
35 CTYPE_BASIC_TYPE, CTYPE_UNION, CTYPE_ARRAY, CTYPE_TYPEDEF,
36 CTYPE_VOID, CTYPE_ENUM, CTYPE_FUNCTION, CTYPE_STRUCT,
37 CSYMBOL_TYPE_FUNCTION, CSYMBOL_TYPE_TYPEDEF, CSYMBOL_TYPE_STRUCT,
38 CSYMBOL_TYPE_ENUM, CSYMBOL_TYPE_UNION, CSYMBOL_TYPE_OBJECT,
39 CSYMBOL_TYPE_MEMBER, CSYMBOL_TYPE_ELLIPSIS, CSYMBOL_TYPE_CONST,
41 from .utils import to_underscores
43 _xdg_data_dirs = [x for x in os.environ.get('XDG_DATA_DIRS', '').split(':') \
44 + [DATADIR, '/usr/share'] if x]
47 class SkipError(Exception):
50 class VaListSkipError(SkipError):
54 names = property(lambda self: self._names)
55 aliases = property(lambda self: self._aliases)
56 type_names = property(lambda self: self._type_names)
57 ctypes = property(lambda self: self._ctypes)
60 super(Names, self).__init__()
61 self._names = odict() # Maps from GIName -> (namespace, node)
62 self._aliases = {} # Maps from GIName -> GIName
63 self._type_names = {} # Maps from GTName -> (namespace, node)
64 self._ctypes = {} # Maps from CType -> (namespace, node)
67 class Transformer(object):
69 def __init__(self, cachestore, namespace_name, namespace_version):
70 self._cachestore = cachestore
72 self._namespace = Namespace(namespace_name, namespace_version)
74 self._pkg_config_packages = set()
75 self._typedefs_ns = {}
76 self._strip_prefix = ''
77 self._includes = set()
78 self._includepaths = []
83 def get_includes(self):
86 def set_strip_suffix(self, strip_suffix):
87 self._strip_suffix = strip_suffix
89 def set_strip_prefix(self, strip_prefix):
90 self._strip_prefix = strip_prefix
92 def get_strip_prefix(self):
93 return self._strip_prefix
95 def get_pkgconfig_packages(self):
96 return self._pkg_config_packages
98 def set_source_ast(self, src_ast):
99 self.generator = src_ast
103 for symbol in self.generator.get_symbols():
105 node = self._traverse_one(symbol)
109 return self._namespace
111 def set_include_paths(self, paths):
112 self._includepaths = list(paths)
114 def register_include(self, include):
115 if include in self._includes:
117 filename = self._find_include(include)
118 self._parse_include(filename)
119 self._includes.add(include)
123 def _find_include(self, include):
124 searchdirs = self._includepaths[:]
125 for path in _xdg_data_dirs:
126 searchdirs.append(os.path.join(path, GIR_SUFFIX))
127 searchdirs.append(GIR_DIR)
129 girname = '%s-%s.gir' % (include.name, include.version)
131 path = os.path.join(d, girname)
132 if os.path.exists(path):
134 sys.stderr.write("Couldn't find include %r (search path: %r)\n"\
135 % (girname, searchdirs))
138 def _parse_include(self, filename):
139 parser = self._cachestore.load(filename)
142 parser.set_include_parsing(True)
143 parser.parse(filename)
144 self._cachestore.store(filename, parser)
146 for include in parser.get_includes():
147 self.register_include(include)
149 for pkg in parser.get_pkgconfig_packages():
150 self._pkg_config_packages.add(pkg)
151 namespace = parser.get_namespace()
152 nsname = namespace.name
153 for node in namespace.nodes:
154 if isinstance(node, Alias):
155 self._names.aliases[node.name] = (nsname, node)
156 elif isinstance(node, (GLibBoxed, Interface, Class)):
157 self._names.type_names[node.type_name] = (nsname, node)
158 giname = '%s.%s' % (nsname, node.name)
159 self._names.names[giname] = (nsname, node)
160 if hasattr(node, 'ctype'):
161 self._names.ctypes[node.ctype] = (nsname, node)
162 elif hasattr(node, 'symbol'):
163 self._names.ctypes[node.symbol] = (nsname, node)
165 def _add_node(self, node):
168 if node.name.startswith('_'):
170 self._namespace.nodes.append(node)
171 self._names.names[node.name] = (None, node)
173 def _strip_namespace_func(self, name):
174 prefix = self._namespace.name.lower() + '_'
175 if name.lower().startswith(prefix):
176 name = name[len(prefix):]
178 prefix = to_underscores(self._namespace.name).lower() + '_'
179 if name.lower().startswith(prefix):
180 name = name[len(prefix):]
181 return self.remove_prefix(name, isfunction=True)
183 def remove_prefix(self, name, isfunction=False):
184 # when --strip-prefix=g:
185 # GHashTable -> HashTable
186 # g_hash_table_new -> hash_table_new
188 prefix = self._strip_prefix.lower()
190 if isfunction and '_' in name:
192 if len(name) > len(prefix) and name.lower().startswith(prefix):
193 name = name[len(prefix):]
196 while name.startswith('_'):
199 if (stripped and self._strip_suffix and
200 len(name) > len(self._strip_suffix) and
201 name.endswith(self._strip_suffix):
202 name = name[:-1*len(self._strip_suffix)]
206 def _traverse_one(self, symbol, stype=None):
207 assert isinstance(symbol, SourceSymbol), symbol
211 if stype == CSYMBOL_TYPE_FUNCTION:
212 return self._create_function(symbol)
213 elif stype == CSYMBOL_TYPE_TYPEDEF:
214 return self._create_typedef(symbol)
215 elif stype == CSYMBOL_TYPE_STRUCT:
216 return self._create_struct(symbol)
217 elif stype == CSYMBOL_TYPE_ENUM:
218 return self._create_enum(symbol)
219 elif stype == CSYMBOL_TYPE_OBJECT:
220 return self._create_object(symbol)
221 elif stype == CSYMBOL_TYPE_MEMBER:
222 return self._create_member(symbol)
223 elif stype == CSYMBOL_TYPE_UNION:
224 return self._create_union(symbol)
225 elif stype == CSYMBOL_TYPE_CONST:
226 return self._create_const(symbol)
228 raise NotImplementedError(
229 'Transformer: unhandled symbol: %r' % (symbol, ))
231 def _enum_common_prefix(self, symbol):
232 def common_prefix(a, b):
234 for aword, bword in zip(a.split('_'), b.split('_')):
236 return '_'.join(commonparts) + '_'
237 commonparts.append(aword)
240 # Nothing less than 2 has a common prefix
241 if len(list(symbol.base_type.child_list)) < 2:
244 for child in symbol.base_type.child_list:
248 prefix = common_prefix(prefix, child.ident)
253 def _create_enum(self, symbol):
254 prefix = self._enum_common_prefix(symbol)
256 prefixlen = len(prefix)
260 for child in symbol.base_type.child_list:
262 name = child.ident[prefixlen:]
264 # Ok, the enum members don't have a consistent prefix
265 # among them, so let's just remove the global namespace
267 name = self.remove_prefix(child.ident)
268 members.append(Member(name.lower(),
272 enum_name = self.remove_prefix(symbol.ident)
273 if symbol.base_type.is_bitfield:
277 node = klass(enum_name, symbol.ident, members)
278 self._names.type_names[symbol.ident] = (None, node)
281 def _create_object(self, symbol):
282 return Member(symbol.ident, symbol.base_type.name,
285 def _type_is_callback(self, type):
286 if isinstance(type, Callback):
288 node = self._names.names.get(type.name)
289 if node and isinstance(node[1], Callback):
293 def _handle_closure(self, param, closure_idx, closure_param):
294 if (closure_param.type.name == 'any' and
295 closure_param.name.endswith('data')):
296 param.closure_name = closure_param.name
297 param.closure_index = closure_idx
301 def _handle_destroy(self, param, destroy_idx, destroy_param):
302 if (destroy_param.type.name == 'GLib.DestroyNotify' or
303 destroy_param.type.ctype == 'GDestroyNotify'):
304 param.destroy_name = destroy_param.name
305 param.destroy_index = destroy_idx
309 def _augment_callback_params(self, params):
310 for i, param in enumerate(params):
311 if not self._type_is_callback(param.type):
314 # set a default scope
315 if param.scope is None:
318 # j is the index where we look for closure/destroy to
319 # group with the callback param
322 continue # no more args -> nothing to group
323 # look at the param directly following for either a
324 # closure or a destroy; only one of these will fire
325 had_closure = self._handle_closure(param, j, params[j])
326 had_destroy = self._handle_destroy(param, j, params[j])
328 # are we out of params, or did we find neither?
329 if j == len(params) or (not had_closure and not had_destroy):
331 # we found either a closure or a destroy; check the
332 # parameter following for the other
334 self._handle_closure(param, j, params[j])
336 self._handle_destroy(param, j, params[j])
338 def _create_function(self, symbol):
339 parameters = list(self._create_parameters(symbol.base_type))
340 return_ = self._create_return(symbol.base_type.base_type)
341 self._augment_callback_params(parameters)
342 name = self._strip_namespace_func(symbol.ident)
343 func = Function(name, return_, parameters, symbol.ident)
346 def _create_source_type(self, source_type):
347 if source_type is None:
349 if source_type.type == CTYPE_VOID:
351 elif source_type.type == CTYPE_BASIC_TYPE:
352 value = source_type.name
353 if source_type.base_type:
354 value += ' ' + self._create_source_type(source_type.base_type)
355 elif source_type.type == CTYPE_TYPEDEF:
356 value = source_type.name
357 elif source_type.type == CTYPE_ARRAY:
358 return self._create_source_type(source_type.base_type)
359 elif source_type.type == CTYPE_POINTER:
360 value = self._create_source_type(source_type.base_type) + '*'
361 elif source_type.type == CTYPE_STRUCT:
362 value = source_type.name
367 def _create_parameters(self, base_type):
369 # warn if we see annotations for unknown parameters
370 param_names = set(child.ident for child in base_type.child_list)
371 for child in base_type.child_list:
372 yield self._create_parameter(child)
374 def _create_member(self, symbol):
375 source_type = symbol.base_type
376 if (source_type.type == CTYPE_POINTER and
377 symbol.base_type.base_type.type == CTYPE_FUNCTION):
379 node = self._create_callback(symbol)
380 except VaListSkipError:
381 #this handles va_list members, and converts them
382 #to unwritable, unreadable void*
383 ftype = Type("any", "void*")
384 ftype = self.resolve_param_type(ftype)
385 node = Field(symbol.ident, ftype, ftype.name,
386 readable=False, writable=False, bits=symbol.const_int)
389 elif source_type.type == CTYPE_STRUCT and source_type.name is None:
390 node = self._create_struct(symbol, anonymous=True)
391 elif source_type.type == CTYPE_UNION and source_type.name is None:
392 node = self._create_union(symbol, anonymous=True)
394 # Special handling for fields; we don't have annotations on them
395 # to apply later, yet.
396 if source_type.type == CTYPE_ARRAY:
397 ctype = self._create_source_type(source_type)
398 canonical_ctype = self._canonicalize_ctype(ctype)
399 if canonical_ctype[-1] == '*':
400 derefed_name = canonical_ctype[:-1]
402 derefed_name = canonical_ctype
403 derefed_name = self.resolve_param_type(derefed_name)
404 ftype = Array(ctype, self.parse_ctype(derefed_name))
405 child_list = list(symbol.base_type.child_list)
406 ftype.zeroterminated = False
408 ftype.size = '%d' % (child_list[0].const_int, )
410 ftype = self._create_type(symbol.base_type,
411 is_param=False, is_retval=False)
412 ftype = self.resolve_param_type(ftype)
413 # Fields are assumed to be read-write
414 # (except for Objects, see also glibtransformer.py)
415 node = Field(symbol.ident, ftype, ftype.name,
416 readable=True, writable=True, bits=symbol.const_int)
419 def _create_typedef(self, symbol):
420 ctype = symbol.base_type.type
421 if (ctype == CTYPE_POINTER and
422 symbol.base_type.base_type.type == CTYPE_FUNCTION):
423 node = self._create_typedef_callback(symbol)
424 if (ctype == CTYPE_FUNCTION):
425 node = self._create_typedef_callback(symbol)
426 elif (ctype == CTYPE_POINTER and
427 symbol.base_type.base_type.type == CTYPE_STRUCT):
428 node = self._create_typedef_struct(symbol, disguised=True)
429 elif ctype == CTYPE_STRUCT:
430 node = self._create_typedef_struct(symbol)
431 elif ctype == CTYPE_UNION:
432 node = self._create_typedef_union(symbol)
433 elif ctype == CTYPE_ENUM:
434 return self._create_enum(symbol)
435 elif ctype in (CTYPE_TYPEDEF,
439 name = self.remove_prefix(symbol.ident)
440 if symbol.base_type.name:
441 target = self.remove_prefix(symbol.base_type.name)
442 elif (ctype == CTYPE_POINTER and
443 symbol.base_type.base_type.name):
444 target = self.remove_prefix(
445 symbol.base_type.base_type.name) + '*'
446 elif (ctype == CTYPE_POINTER and
447 symbol.base_type.base_type.type == CTYPE_VOID):
451 if name in type_names:
453 return Alias(name, target, ctype=symbol.ident)
455 raise NotImplementedError(
456 "symbol %r of type %s" % (symbol.ident, ctype_name(ctype)))
459 def _canonicalize_ctype(self, ctype):
460 # First look up the ctype including any pointers;
461 # a few type names like 'char*' have their own aliases
462 # and we need pointer information for those.
463 firstpass = type_name_from_ctype(ctype)
465 # If we have a particular alias for this, skip deep
466 # canonicalization to prevent changing
467 # e.g. char* -> int8*
468 if firstpass != ctype:
471 # We're also done if the type is already a fundamental
472 # known type, or there are no pointers.
473 if ctype in type_names or not firstpass.endswith('*'):
476 # We have a pointer type.
477 # Strip the end pointer, canonicalize our base type
478 base = firstpass[:-1]
479 canonical_base = self._canonicalize_ctype(base)
481 # Append the pointer again
482 canonical = canonical_base + '*'
486 def parse_ctype(self, ctype, is_member=False):
487 canonical = self._canonicalize_ctype(ctype)
489 # Remove all pointers - we require standard calling
490 # conventions. For example, an 'int' is always passed by
491 # value (unless it's out or inout).
492 derefed_typename = canonical.replace('*', '')
494 # Preserve "pointerness" of struct/union members
495 if (is_member and canonical.endswith('*') and
496 derefed_typename in BASIC_GIR_TYPES):
499 return derefed_typename
501 def _create_type(self, source_type, is_param, is_retval):
502 ctype = self._create_source_type(source_type)
503 if ctype.startswith('va_list'):
504 raise VaListSkipError()
505 # FIXME: FILE* should not be skipped, it should be handled
507 elif ctype == 'FILE*':
510 is_member = not (is_param or is_retval)
511 # Here we handle basic type parsing; most of the heavy lifting
512 # and inference comes in annotationparser.py when we merge
513 # in annotation data.
514 derefed_name = self.parse_ctype(ctype, is_member)
515 rettype = Type(derefed_name, ctype)
516 rettype.canonical = self._canonicalize_ctype(ctype)
517 derefed_ctype = ctype.replace('*', '')
518 rettype.derefed_canonical = self._canonicalize_ctype(derefed_ctype)
520 canontype = type_name_from_ctype(ctype)
521 # Is it a const char * or a const gpointer?
522 if ((canontype == TYPE_STRING or source_type.type == CTYPE_POINTER) and
523 (source_type.base_type.type_qualifier & TYPE_QUALIFIER_CONST)):
524 rettype.is_const = True
527 def _create_parameter(self, symbol):
528 if symbol.type == CSYMBOL_TYPE_ELLIPSIS:
531 ptype = self._create_type(symbol.base_type,
532 is_param=True, is_retval=False)
533 ptype = self.resolve_param_type(ptype)
534 return Parameter(symbol.ident, ptype)
536 def _create_return(self, source_type):
537 rtype = self._create_type(source_type,
538 is_param=False, is_retval=True)
539 rtype = self.resolve_param_type(rtype)
540 return_ = Return(rtype)
543 def _create_const(self, symbol):
544 # Don't create constants for non-public things
545 # http://bugzilla.gnome.org/show_bug.cgi?id=572790
546 if (symbol.source_filename is None or
547 not symbol.source_filename.endswith('.h')):
549 name = self.remove_prefix(symbol.ident)
550 if symbol.const_string is not None:
552 value = symbol.const_string
553 elif symbol.const_int is not None:
555 value = symbol.const_int
556 elif symbol.const_double is not None:
558 value = symbol.const_double
560 raise AssertionError()
562 const = Constant(name, type_name, value)
565 def _create_typedef_struct(self, symbol, disguised=False):
566 name = self.remove_prefix(symbol.ident)
567 struct = Struct(name, symbol.ident, disguised)
568 self._typedefs_ns[symbol.ident] = struct
569 self._create_struct(symbol)
572 def _create_typedef_union(self, symbol):
573 name = self.remove_prefix(symbol.ident)
574 union = Union(name, symbol.ident)
575 self._typedefs_ns[symbol.ident] = union
576 self._create_union(symbol)
579 def _create_typedef_callback(self, symbol):
580 callback = self._create_callback(symbol)
581 self._typedefs_ns[callback.name] = callback
584 def _create_compound(self, klass, symbol, anonymous):
585 if symbol.ident is None:
586 # the compound is an anonymous member of another union or a struct
588 compound = klass(None, None)
590 compound = self._typedefs_ns.get(symbol.ident, None)
593 # This is a bit of a hack; really we should try
594 # to resolve through the typedefs to find the real
596 if symbol.ident.startswith('_'):
597 name = symbol.ident[1:]
598 compound = self._typedefs_ns.get(name, None)
602 name = self.remove_prefix(name)
603 compound = klass(name, symbol.ident)
605 for child in symbol.base_type.child_list:
606 field = self._traverse_one(child)
608 compound.fields.append(field)
612 def _create_struct(self, symbol, anonymous=False):
613 return self._create_compound(Struct, symbol, anonymous)
615 def _create_union(self, symbol, anonymous=False):
616 return self._create_compound(Union, symbol, anonymous)
618 def _create_callback(self, symbol):
619 parameters = list(self._create_parameters(symbol.base_type.base_type))
620 retval = self._create_return(symbol.base_type.base_type.base_type)
621 ret_type = symbol.base_type.base_type.base_type
623 ret_type = symbol.base_type.base_type
624 retval = self._create_return(ret_type)
626 # Mark the 'user_data' arguments
627 for i, param in enumerate(parameters):
628 if (param.type.name == 'any' and
629 param.name == 'user_data'):
630 param.closure_index = i
632 if symbol.ident.find('_') > 0:
633 name = self.remove_prefix(symbol.ident, True)
635 name = self.remove_prefix(symbol.ident)
636 callback = Callback(name, retval, parameters, symbol.ident)
640 def _typepair_to_str(self, item):
644 return '%s.%s' % (nsname, item.name)
646 def _resolve_type_name_1(self, type_name, ctype, names):
647 # First look using the built-in names
650 return type_names[ctype]
654 return type_names[type_name]
659 ctype = ctype.replace('*', '')
660 resolved = names.ctypes.get(ctype)
662 return self._typepair_to_str(resolved)
663 type_name = self.remove_prefix(type_name)
664 resolved = names.aliases.get(type_name)
666 return self._typepair_to_str(resolved)
667 resolved = names.names.get(type_name)
669 return self._typepair_to_str(resolved)
670 resolved = names.type_names.get(type_name)
672 return self._typepair_to_str(resolved)
673 raise KeyError("failed to find %r" % (type_name, ))
675 def resolve_type_name_full(self, type_name, ctype,
676 names, allow_invalid=True):
678 return self._resolve_type_name_1(type_name, ctype, names)
681 return self._resolve_type_name_1(type_name, ctype, self._names)
683 if not allow_invalid:
687 def resolve_type_name(self, type_name, ctype=None):
689 return self.resolve_type_name_full(type_name, ctype, self._names)
693 def gtypename_to_giname(self, gtname, names):
694 resolved = names.type_names.get(gtname)
696 return self._typepair_to_str(resolved)
697 resolved = self._names.type_names.get(gtname)
699 return self._typepair_to_str(resolved)
700 raise KeyError("Failed to resolve GType name: %r" % (gtname, ))
702 def ctype_of(self, obj):
703 if hasattr(obj, 'ctype'):
705 elif hasattr(obj, 'symbol'):
710 def resolve_param_type_full(self, ptype, names, **kwargs):
711 if isinstance(ptype, Node):
712 ptype.name = self.resolve_type_name_full(ptype.name,
713 self.ctype_of(ptype),
715 elif isinstance(ptype, basestring):
716 return self.resolve_type_name_full(ptype, ptype, names, **kwargs)
718 raise AssertionError("Unhandled param: %r" % (ptype, ))
721 def resolve_param_type(self, ptype):
723 return self.resolve_param_type_full(ptype, self._names)
727 def follow_aliases(self, type_name, names):
729 resolved = names.aliases.get(type_name)
731 (ns, alias) = resolved
732 type_name = alias.target
737 def iter_enums(self):
738 for node in self._namespace.nodes:
739 if isinstance(node, Enum):