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.
23 from .ast import (Bitfield, Callback, Enum, Function, Namespace, Member,
24 Parameter, Return, Struct, Field,
25 Type, Array, Alias, Interface, Class, Node, Union,
26 Varargs, Constant, type_name_from_ctype,
27 type_names, TYPE_STRING, BASIC_GIR_TYPES)
28 from .config import DATADIR, GIR_DIR, GIR_SUFFIX
29 from .glibast import GLibBoxed
30 from .girparser import GIRParser
31 from .odict import odict
32 from .sourcescanner import (
33 SourceSymbol, ctype_name, CTYPE_POINTER,
34 CTYPE_BASIC_TYPE, CTYPE_UNION, CTYPE_ARRAY, CTYPE_TYPEDEF,
35 CTYPE_VOID, CTYPE_ENUM, CTYPE_FUNCTION, CTYPE_STRUCT,
36 CSYMBOL_TYPE_FUNCTION, CSYMBOL_TYPE_TYPEDEF, CSYMBOL_TYPE_STRUCT,
37 CSYMBOL_TYPE_ENUM, CSYMBOL_TYPE_UNION, CSYMBOL_TYPE_OBJECT,
38 CSYMBOL_TYPE_MEMBER, CSYMBOL_TYPE_ELLIPSIS, CSYMBOL_TYPE_CONST,
40 from .utils import to_underscores
42 _xdg_data_dirs = [x for x in os.environ.get('XDG_DATA_DIRS', '').split(':') \
43 + [DATADIR, '/usr/share'] if x]
46 class SkipError(Exception):
51 names = property(lambda self: self._names)
52 aliases = property(lambda self: self._aliases)
53 type_names = property(lambda self: self._type_names)
54 ctypes = property(lambda self: self._ctypes)
57 super(Names, self).__init__()
58 self._names = odict() # Maps from GIName -> (namespace, node)
59 self._aliases = {} # Maps from GIName -> GIName
60 self._type_names = {} # Maps from GTName -> (namespace, node)
61 self._ctypes = {} # Maps from CType -> (namespace, node)
64 class Transformer(object):
66 def __init__(self, cachestore, namespace_name, namespace_version):
67 self._cachestore = cachestore
69 self._namespace = Namespace(namespace_name, namespace_version)
71 self._pkg_config_packages = set()
72 self._typedefs_ns = {}
73 self._strip_prefix = ''
74 self._includes = set()
75 self._includepaths = []
80 def get_includes(self):
83 def set_strip_prefix(self, strip_prefix):
84 self._strip_prefix = strip_prefix
86 def get_strip_prefix(self):
87 return self._strip_prefix
89 def get_pkgconfig_packages(self):
90 return self._pkg_config_packages
92 def set_source_ast(self, src_ast):
93 self.generator = src_ast
97 for symbol in self.generator.get_symbols():
99 node = self._traverse_one(symbol)
103 return self._namespace
105 def set_include_paths(self, paths):
106 self._includepaths = list(paths)
108 def register_include(self, include):
109 if include in self._includes:
111 filename = self._find_include(include)
112 self._parse_include(filename)
113 self._includes.add(include)
117 def _find_include(self, include):
118 searchdirs = self._includepaths[:]
119 for path in _xdg_data_dirs:
120 searchdirs.append(os.path.join(path, GIR_SUFFIX))
121 searchdirs.append(GIR_DIR)
123 girname = '%s-%s.gir' % (include.name, include.version)
125 path = os.path.join(d, girname)
126 if os.path.exists(path):
128 raise ValueError("Couldn't find include %r (search path: %r)"\
129 % (girname, searchdirs))
131 def _parse_include(self, filename):
132 parser = self._cachestore.load(filename)
135 parser.set_include_parsing(True)
136 parser.parse(filename)
137 self._cachestore.store(filename, parser)
139 for include in parser.get_includes():
140 self.register_include(include)
142 for pkg in parser.get_pkgconfig_packages():
143 self._pkg_config_packages.add(pkg)
144 namespace = parser.get_namespace()
145 nsname = namespace.name
146 for node in namespace.nodes:
147 if isinstance(node, Alias):
148 self._names.aliases[node.name] = (nsname, node)
149 elif isinstance(node, (GLibBoxed, Interface, Class)):
150 self._names.type_names[node.type_name] = (nsname, node)
151 giname = '%s.%s' % (nsname, node.name)
152 self._names.names[giname] = (nsname, node)
153 if hasattr(node, 'ctype'):
154 self._names.ctypes[node.ctype] = (nsname, node)
155 elif hasattr(node, 'symbol'):
156 self._names.ctypes[node.symbol] = (nsname, node)
158 def _add_node(self, node):
161 if node.name.startswith('_'):
163 self._namespace.nodes.append(node)
164 self._names.names[node.name] = (None, node)
166 def _strip_namespace_func(self, name):
167 prefix = self._namespace.name.lower() + '_'
168 if name.lower().startswith(prefix):
169 name = name[len(prefix):]
171 prefix = to_underscores(self._namespace.name).lower() + '_'
172 if name.lower().startswith(prefix):
173 name = name[len(prefix):]
174 return self.remove_prefix(name, isfunction=True)
176 def remove_prefix(self, name, isfunction=False):
177 # when --strip-prefix=g:
178 # GHashTable -> HashTable
179 # g_hash_table_new -> hash_table_new
180 prefix = self._strip_prefix.lower()
183 if len(name) > len(prefix) and name.lower().startswith(prefix):
184 name = name[len(prefix):]
186 while name.startswith('_'):
190 def _traverse_one(self, symbol, stype=None):
191 assert isinstance(symbol, SourceSymbol), symbol
195 if stype == CSYMBOL_TYPE_FUNCTION:
196 return self._create_function(symbol)
197 elif stype == CSYMBOL_TYPE_TYPEDEF:
198 return self._create_typedef(symbol)
199 elif stype == CSYMBOL_TYPE_STRUCT:
200 return self._create_struct(symbol)
201 elif stype == CSYMBOL_TYPE_ENUM:
202 return self._create_enum(symbol)
203 elif stype == CSYMBOL_TYPE_OBJECT:
204 return self._create_object(symbol)
205 elif stype == CSYMBOL_TYPE_MEMBER:
206 return self._create_member(symbol)
207 elif stype == CSYMBOL_TYPE_UNION:
208 return self._create_union(symbol)
209 elif stype == CSYMBOL_TYPE_CONST:
210 return self._create_const(symbol)
212 raise NotImplementedError(
213 'Transformer: unhandled symbol: %r' % (symbol, ))
215 def _enum_common_prefix(self, symbol):
216 def common_prefix(a, b):
226 # Nothing less than 2 has a common prefix
227 if len(list(symbol.base_type.child_list)) < 2:
230 for child in symbol.base_type.child_list:
234 prefix = common_prefix(prefix, child.ident)
239 def _create_enum(self, symbol):
240 prefix = self._enum_common_prefix(symbol)
242 prefixlen = len(prefix)
246 for child in symbol.base_type.child_list:
248 name = child.ident[prefixlen:]
250 # Ok, the enum members don't have a consistent prefix
251 # among them, so let's just remove the global namespace
253 name = self.remove_prefix(child.ident)
254 members.append(Member(name.lower(),
258 enum_name = self.remove_prefix(symbol.ident)
259 if symbol.base_type.is_bitfield:
263 node = klass(enum_name, symbol.ident, members)
264 self._names.type_names[symbol.ident] = (None, node)
267 def _create_object(self, symbol):
268 return Member(symbol.ident, symbol.base_type.name,
271 def _type_is_callback(self, type):
272 if (isinstance(type, Callback) or
273 isinstance(self._typedefs_ns.get(type.name), Callback)):
277 def _handle_closure(self, param, closure_idx, closure_param):
278 if (closure_param.type.name == 'any' and
279 closure_param.name.endswith('data')):
280 param.closure_name = closure_param.name
281 param.closure_index = closure_idx
285 def _handle_destroy(self, param, destroy_idx, destroy_param):
286 if ((self._namespace.name == 'GLib' and
287 destroy_param.type.name == 'DestroyNotify') or
288 destroy_param.type.name == 'GLib.DestroyNotify'):
289 param.destroy_name = destroy_param.name
290 param.destroy_index = destroy_idx
294 def _augment_callback_params(self, params):
295 for i, param in enumerate(params):
296 if not self._type_is_callback(param.type):
299 # j is the index where we look for closure/destroy to
300 # group with the callback param
303 continue # no more args -> nothing to group
304 # look at the param directly following for either a
305 # closure or a destroy; only one of these will fire
306 had_closure = self._handle_closure(param, j, params[j])
307 had_destroy = self._handle_destroy(param, j, params[j])
309 # are we out of params, or did we find neither?
310 if j == len(params) or (not had_closure and not had_destroy):
312 # we found either a closure or a destroy; check the
313 # parameter following for the other
315 self._handle_closure(param, j, params[j])
317 self._handle_destroy(param, j, params[j])
319 def _create_function(self, symbol):
320 parameters = list(self._create_parameters(symbol.base_type))
321 return_ = self._create_return(symbol.base_type.base_type)
322 self._augment_callback_params(parameters)
323 name = self._strip_namespace_func(symbol.ident)
324 func = Function(name, return_, parameters, symbol.ident)
327 def _create_source_type(self, source_type):
328 if source_type is None:
330 if source_type.type == CTYPE_VOID:
332 elif source_type.type == CTYPE_BASIC_TYPE:
333 value = source_type.name
334 elif source_type.type == CTYPE_TYPEDEF:
335 value = source_type.name
336 elif source_type.type == CTYPE_ARRAY:
337 return self._create_source_type(source_type.base_type)
338 elif source_type.type == CTYPE_POINTER:
339 value = self._create_source_type(source_type.base_type) + '*'
344 def _create_parameters(self, base_type):
346 # warn if we see annotations for unknown parameters
347 param_names = set(child.ident for child in base_type.child_list)
348 for child in base_type.child_list:
349 yield self._create_parameter(child)
351 def _create_member(self, symbol):
352 source_type = symbol.base_type
353 if (source_type.type == CTYPE_POINTER and
354 symbol.base_type.base_type.type == CTYPE_FUNCTION):
355 node = self._create_callback(symbol)
356 elif source_type.type == CTYPE_STRUCT and source_type.name is None:
357 node = self._create_struct(symbol, anonymous=True)
358 elif source_type.type == CTYPE_UNION and source_type.name is None:
359 node = self._create_union(symbol, anonymous=True)
361 # Special handling for fields; we don't have annotations on them
362 # to apply later, yet.
363 if source_type.type == CTYPE_ARRAY:
364 ctype = self._create_source_type(source_type)
365 canonical_ctype = self._canonicalize_ctype(ctype)
366 if canonical_ctype[-1] == '*':
367 derefed_name = canonical_ctype[:-1]
369 derefed_name = canonical_ctype
370 derefed_name = self.resolve_param_type(derefed_name)
371 ftype = Array(ctype, self.parse_ctype(derefed_name))
372 child_list = list(symbol.base_type.child_list)
373 ftype.zeroterminated = False
375 ftype.size = '%d' % (child_list[0].const_int, )
377 ftype = self._create_type(symbol.base_type,
378 is_param=False, is_retval=False)
379 ftype = self.resolve_param_type(ftype)
380 # Fields are assumed to be read-write
381 # (except for Objects, see also glibtransformer.py)
382 node = Field(symbol.ident, ftype, ftype.name,
383 readable=True, writable=True, bits=symbol.const_int)
386 def _create_typedef(self, symbol):
387 ctype = symbol.base_type.type
388 if (ctype == CTYPE_POINTER and
389 symbol.base_type.base_type.type == CTYPE_FUNCTION):
390 node = self._create_typedef_callback(symbol)
391 elif (ctype == CTYPE_POINTER and
392 symbol.base_type.base_type.type == CTYPE_STRUCT):
393 node = self._create_typedef_struct(symbol, disguised=True)
394 elif ctype == CTYPE_STRUCT:
395 node = self._create_typedef_struct(symbol)
396 elif ctype == CTYPE_UNION:
397 node = self._create_typedef_union(symbol)
398 elif ctype == CTYPE_ENUM:
399 return self._create_enum(symbol)
400 elif ctype in (CTYPE_TYPEDEF,
404 name = self.remove_prefix(symbol.ident)
405 if symbol.base_type.name:
406 target = self.remove_prefix(symbol.base_type.name)
409 if name in type_names:
411 return Alias(name, target, ctype=symbol.ident)
413 raise NotImplementedError(
414 "symbol %r of type %s" % (symbol.ident, ctype_name(ctype)))
417 def _canonicalize_ctype(self, ctype):
418 # First look up the ctype including any pointers;
419 # a few type names like 'char*' have their own aliases
420 # and we need pointer information for those.
421 firstpass = type_name_from_ctype(ctype)
423 # If we have a particular alias for this, skip deep
424 # canonicalization to prevent changing
425 # e.g. char* -> int8*
426 if firstpass != ctype:
429 # We're also done if the type is already a fundamental
430 # known type, or there are no pointers.
431 if ctype in type_names or not firstpass.endswith('*'):
434 # We have a pointer type.
435 # Strip the end pointer, canonicalize our base type
436 base = firstpass[:-1]
437 canonical_base = self._canonicalize_ctype(base)
439 # Append the pointer again
440 canonical = canonical_base + '*'
444 def parse_ctype(self, ctype, is_member=False):
445 canonical = self._canonicalize_ctype(ctype)
447 # Remove all pointers - we require standard calling
448 # conventions. For example, an 'int' is always passed by
449 # value (unless it's out or inout).
450 derefed_typename = canonical.replace('*', '')
452 # Preserve "pointerness" of struct/union members
453 if (is_member and canonical.endswith('*') and
454 derefed_typename in BASIC_GIR_TYPES):
457 return derefed_typename
459 def _create_type(self, source_type, is_param, is_retval):
460 ctype = self._create_source_type(source_type)
461 if ctype.startswith('va_list'):
463 # FIXME: FILE* should not be skipped, it should be handled
465 elif ctype == 'FILE*':
468 is_member = not (is_param or is_retval)
469 # Here we handle basic type parsing; most of the heavy lifting
470 # and inference comes in annotationparser.py when we merge
471 # in annotation data.
472 derefed_name = self.parse_ctype(ctype, is_member)
473 rettype = Type(derefed_name, ctype)
474 rettype.canonical = self._canonicalize_ctype(ctype)
475 derefed_ctype = ctype.replace('*', '')
476 rettype.derefed_canonical = self._canonicalize_ctype(derefed_ctype)
478 canontype = type_name_from_ctype(ctype)
479 # Is it a const char * or a const gpointer?
480 if ((canontype == TYPE_STRING or source_type.type == CTYPE_POINTER) and
481 (source_type.base_type.type_qualifier & TYPE_QUALIFIER_CONST)):
482 rettype.is_const = True
485 def _create_parameter(self, symbol):
486 if symbol.type == CSYMBOL_TYPE_ELLIPSIS:
489 ptype = self._create_type(symbol.base_type,
490 is_param=True, is_retval=False)
491 ptype = self.resolve_param_type(ptype)
492 return Parameter(symbol.ident, ptype)
494 def _create_return(self, source_type):
495 rtype = self._create_type(source_type,
496 is_param=False, is_retval=True)
497 rtype = self.resolve_param_type(rtype)
498 return_ = Return(rtype)
501 def _create_const(self, symbol):
502 # Don't create constants for non-public things
503 # http://bugzilla.gnome.org/show_bug.cgi?id=572790
504 if (symbol.source_filename is None or
505 not symbol.source_filename.endswith('.h')):
507 name = self.remove_prefix(symbol.ident)
508 if symbol.const_string is not None:
510 value = symbol.const_string
511 elif symbol.const_int is not None:
513 value = symbol.const_int
514 elif symbol.const_double is not None:
516 value = symbol.const_double
518 raise AssertionError()
520 const = Constant(name, type_name, value)
523 def _create_typedef_struct(self, symbol, disguised=False):
524 name = self.remove_prefix(symbol.ident)
525 struct = Struct(name, symbol.ident, disguised)
526 self._typedefs_ns[symbol.ident] = struct
527 self._create_struct(symbol)
530 def _create_typedef_union(self, symbol):
531 name = self.remove_prefix(symbol.ident)
532 union = Union(name, symbol.ident)
533 self._typedefs_ns[symbol.ident] = union
534 self._create_union(symbol)
537 def _create_typedef_callback(self, symbol):
538 callback = self._create_callback(symbol)
539 self._typedefs_ns[callback.name] = callback
542 def _create_compound(self, klass, symbol, anonymous):
543 if symbol.ident is None:
544 # the compound is an anonymous member of another union or a struct
546 compound = klass(None, None)
548 compound = self._typedefs_ns.get(symbol.ident, None)
551 # This is a bit of a hack; really we should try
552 # to resolve through the typedefs to find the real
554 if symbol.ident.startswith('_'):
555 name = symbol.ident[1:]
556 compound = self._typedefs_ns.get(name, None)
560 name = self.remove_prefix(name)
561 compound = klass(name, symbol.ident)
563 for child in symbol.base_type.child_list:
564 field = self._traverse_one(child)
566 compound.fields.append(field)
570 def _create_struct(self, symbol, anonymous=False):
571 return self._create_compound(Struct, symbol, anonymous)
573 def _create_union(self, symbol, anonymous=False):
574 return self._create_compound(Union, symbol, anonymous)
576 def _create_callback(self, symbol):
577 parameters = list(self._create_parameters(symbol.base_type.base_type))
578 retval = self._create_return(symbol.base_type.base_type.base_type)
580 # Mark the 'user_data' arguments
581 for i, param in enumerate(parameters):
582 if (param.type.name == 'any' and
583 param.name == 'user_data'):
584 param.closure_index = i
586 if symbol.ident.find('_') > 0:
587 name = self.remove_prefix(symbol.ident, True)
589 name = self.remove_prefix(symbol.ident)
590 callback = Callback(name, retval, parameters, symbol.ident)
594 def _typepair_to_str(self, item):
598 return '%s.%s' % (nsname, item.name)
600 def _resolve_type_name_1(self, type_name, ctype, names):
601 # First look using the built-in names
604 return type_names[ctype]
608 return type_names[type_name]
613 ctype = ctype.replace('*', '')
614 resolved = names.ctypes.get(ctype)
616 return self._typepair_to_str(resolved)
617 type_name = self.remove_prefix(type_name)
618 resolved = names.aliases.get(type_name)
620 return self._typepair_to_str(resolved)
621 resolved = names.names.get(type_name)
623 return self._typepair_to_str(resolved)
624 resolved = names.type_names.get(type_name)
626 return self._typepair_to_str(resolved)
627 raise KeyError("failed to find %r" % (type_name, ))
629 def resolve_type_name_full(self, type_name, ctype,
630 names, allow_invalid=True):
632 return self._resolve_type_name_1(type_name, ctype, names)
635 return self._resolve_type_name_1(type_name, ctype, self._names)
637 if not allow_invalid:
641 def resolve_type_name(self, type_name, ctype=None):
643 return self.resolve_type_name_full(type_name, ctype, self._names)
647 def gtypename_to_giname(self, gtname, names):
648 resolved = names.type_names.get(gtname)
650 return self._typepair_to_str(resolved)
651 resolved = self._names.type_names.get(gtname)
653 return self._typepair_to_str(resolved)
654 raise KeyError("Failed to resolve GType name: %r" % (gtname, ))
656 def ctype_of(self, obj):
657 if hasattr(obj, 'ctype'):
659 elif hasattr(obj, 'symbol'):
664 def resolve_param_type_full(self, ptype, names, **kwargs):
665 if isinstance(ptype, Node):
666 ptype.name = self.resolve_type_name_full(ptype.name,
667 self.ctype_of(ptype),
669 elif isinstance(ptype, basestring):
670 return self.resolve_type_name_full(ptype, ptype, names, **kwargs)
672 raise AssertionError("Unhandled param: %r" % (ptype, ))
675 def resolve_param_type(self, ptype):
677 return self.resolve_param_type_full(ptype, self._names)
681 def follow_aliases(self, type_name, names):
683 resolved = names.aliases.get(type_name)
685 (ns, alias) = resolved
686 type_name = alias.target