# -*- Mode: Python -*- # GObject-Introspection - a framework for introspecting GObject libraries # Copyright (C) 2008 Johan Dahlin # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2 of the License, or (at your option) any later version. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the # Free Software Foundation, Inc., 59 Temple Place - Suite 330, # Boston, MA 02111-1307, USA. # import os import sys from . import ast from . import message from .cachestore import CacheStore from .girparser import GIRParser from .sourcescanner import ( SourceSymbol, ctype_name, CTYPE_POINTER, CTYPE_BASIC_TYPE, CTYPE_UNION, CTYPE_ARRAY, CTYPE_TYPEDEF, CTYPE_VOID, CTYPE_ENUM, CTYPE_FUNCTION, CTYPE_STRUCT, CSYMBOL_TYPE_FUNCTION, CSYMBOL_TYPE_TYPEDEF, CSYMBOL_TYPE_STRUCT, CSYMBOL_TYPE_ENUM, CSYMBOL_TYPE_UNION, CSYMBOL_TYPE_OBJECT, CSYMBOL_TYPE_MEMBER, CSYMBOL_TYPE_ELLIPSIS, CSYMBOL_TYPE_CONST, TYPE_QUALIFIER_CONST, TYPE_QUALIFIER_VOLATILE) class TransformerException(Exception): pass _xdg_data_dirs = [x for x in os.environ.get('XDG_DATA_DIRS', '').split(os.pathsep)] _xdg_data_dirs.append(DATADIR) if os.name != 'nt': _xdg_data_dirs.append('/usr/share') class Transformer(object): namespace = property(lambda self: self._namespace) def __init__(self, namespace, accept_unprefixed=False): self._cachestore = CacheStore() self._accept_unprefixed = accept_unprefixed self._namespace = namespace self._pkg_config_packages = set() self._typedefs_ns = {} self._parsed_includes = {} # Namespace> self._includepaths = [] self._passthrough_mode = False self._annotations = {} def get_pkgconfig_packages(self): return self._pkg_config_packages def disable_cache(self): self._cachestore = None def set_passthrough_mode(self): self._passthrough_mode = True def set_annotations(self, annotations): self._annotations = annotations def _append_new_node(self, node): original = self._namespace.get(node.name) # Special case constants here; we allow duplication to sort-of # handle #ifdef. But this introduces an arch-dependency in the .gir # file. So far this has only come up scanning glib - in theory, other # modules will just depend on that. if isinstance(original, ast.Constant) and isinstance(node, ast.Constant): pass elif original: positions = set() positions.update(original.file_positions) positions.update(node.file_positions) message.fatal("Namespace conflict for '%s'" % (node.name, ), positions) else: self._namespace.append(node) def parse(self, symbols): for symbol in symbols: ## WORKAROUND ## # https://bugzilla.gnome.org/show_bug.cgi?id=550616 if symbol.ident in ['gst_g_error_get_type']: continue node = self._traverse_one(symbol) if node: self._append_new_node(node) # Now look through the namespace for things like # typedef struct _Foo Foo; # where we've never seen the struct _Foo. Just create # an empty structure for these as "disguised" # If we do have a class/interface, merge fields for typedef, compound in self._typedefs_ns.iteritems(): ns_compound = self._namespace.get(compound.name) if not ns_compound: ns_compound = self._namespace.get('_' + compound.name) if (not ns_compound and isinstance(compound, (ast.Record, ast.Union)) and len(compound.fields) == 0): disguised = ast.Record(compound.name, typedef, disguised=True) self._namespace.append(disguised) elif not ns_compound: self._namespace.append(compound) elif isinstance(ns_compound, (ast.Record, ast.Union)) and len(ns_compound.fields) == 0: ns_compound.fields = compound.fields self._typedefs_ns = None def set_include_paths(self, paths): self._includepaths = list(paths) def register_include(self, include): if include in self._namespace.includes: return self._namespace.includes.add(include) filename = self._find_include(include) self._parse_include(filename) def register_include_uninstalled(self, include_path): basename = os.path.basename(include_path) if not basename.endswith('.gir'): raise SystemExit( "Include path %r must be a filename path ending in .gir" % (include_path, )) girname = basename[:-4] include = ast.Include.from_string(girname) if include in self._namespace.includes: return self._namespace.includes.add(include) self._parse_include(include_path, uninstalled=True) def lookup_giname(self, name): """Given a name of the form Foo or Bar.Foo, return the corresponding ast.Node, or None if none available. Will throw KeyError however for unknown namespaces.""" if '.' not in name: return self._namespace.get(name) else: (ns, giname) = name.split('.', 1) if ns == self._namespace.name: return self._namespace.get(giname) # Fallback to the main namespace if not a dependency and matches a prefix if ns in self._namespace.identifier_prefixes and not ns in self._parsed_includes: message.warn(("Deprecated reference to identifier " + "prefix %s in GIName %s") % (ns, name)) return self._namespace.get(giname) include = self._parsed_includes[ns] return include.get(giname) def lookup_typenode(self, typeobj): """Given a Type object, if it points to a giname, calls lookup_giname() on the name. Otherwise return None.""" if typeobj.target_giname: return self.lookup_giname(typeobj.target_giname) return None # Private def _find_include(self, include): searchdirs = self._includepaths[:] for path in _xdg_data_dirs: searchdirs.append(os.path.join(path, 'gir-1.0')) searchdirs.append(os.path.join(DATADIR, 'gir-1.0')) girname = '%s-%s.gir' % (include.name, include.version) for d in searchdirs: path = os.path.join(d, girname) if os.path.exists(path): return path sys.stderr.write("Couldn't find include %r (search path: %r)\n"\ % (girname, searchdirs)) sys.exit(1) @classmethod def parse_from_gir(cls, filename, extra_include_dirs=None): self = cls(None) if extra_include_dirs is not None: self.set_include_paths(extra_include_dirs) self.set_passthrough_mode() self._parse_include(filename) parser = self._cachestore.load(filename) self._namespace = parser.get_namespace() del self._parsed_includes[self._namespace.name] return self def _parse_include(self, filename, uninstalled=False): parser = None if self._cachestore is not None: parser = self._cachestore.load(filename) if parser is None: parser = GIRParser(types_only=not self._passthrough_mode) parser.parse(filename) if self._cachestore is not None: self._cachestore.store(filename, parser) for include in parser.get_namespace().includes: if include.name not in self._parsed_includes: dep_filename = self._find_include(include) self._parse_include(dep_filename) if not uninstalled: for pkg in parser.get_namespace().exported_packages: self._pkg_config_packages.add(pkg) namespace = parser.get_namespace() self._parsed_includes[namespace.name] = namespace def _iter_namespaces(self): """Return an iterator over all included namespaces; the currently-scanned namespace is first.""" yield self._namespace for ns in self._parsed_includes.itervalues(): yield ns def _sort_matches(self, x, y): if x[0] is self._namespace: return 1 elif y[0] is self._namespace: return -1 return cmp(x[2], y[2]) def _split_c_string_for_namespace_matches(self, name, is_identifier=False): matches = [] # Namespaces which might contain this name unprefixed_namespaces = [] # Namespaces with no prefix, last resort for ns in self._iter_namespaces(): if is_identifier: prefixes = ns.identifier_prefixes elif name[0].isupper(): prefixes = ns._ucase_symbol_prefixes else: prefixes = ns.symbol_prefixes if prefixes: for prefix in prefixes: if (not is_identifier) and (not prefix.endswith('_')): prefix = prefix + '_' if name.startswith(prefix): matches.append((ns, name[len(prefix):], len(prefix))) break else: unprefixed_namespaces.append(ns) if matches: matches.sort(self._sort_matches) return map(lambda x: (x[0], x[1]), matches) elif self._accept_unprefixed: return [(self._namespace, name)] elif unprefixed_namespaces: # A bit of a hack; this function ideally shouldn't look through the # contents of namespaces; but since we aren't scanning anything # without a prefix, it's not too bad. for ns in unprefixed_namespaces: if name in ns: return [(ns, name)] raise ValueError("Unknown namespace for %s %r" % ('identifier' if is_identifier else 'symbol', name, )) def split_ctype_namespaces(self, ident): """Given a StudlyCaps string identifier like FooBar, return a list of (namespace, stripped_identifier) sorted by namespace length, or raise ValueError. As a special case, if the current namespace matches, it is always biggest (i.e. last).""" return self._split_c_string_for_namespace_matches(ident, is_identifier=True) def split_csymbol_namespaces(self, symbol): """Given a C symbol like foo_bar_do_baz, return a list of (namespace, stripped_symbol) sorted by namespace match probablity, or raise ValueError.""" return self._split_c_string_for_namespace_matches(symbol, is_identifier=False) def split_csymbol(self, symbol): """Given a C symbol like foo_bar_do_baz, return the most probable (namespace, stripped_symbol) match, or raise ValueError.""" matches = self._split_c_string_for_namespace_matches(symbol, is_identifier=False) return matches[-1] def strip_identifier(self, ident): hidden = ident.startswith('_') if hidden: ident = ident[1:] try: matches = self.split_ctype_namespaces(ident) except ValueError as e: raise TransformerException(str(e)) for ns, name in matches: if ns is self._namespace: if hidden: return '_' + name return name (ns, name) = matches[-1] raise TransformerException( "Skipping foreign identifier %r from namespace %s" % ( ident, ns.name, )) return None def _strip_symbol(self, symbol): ident = symbol.ident hidden = ident.startswith('_') if hidden: ident = ident[1:] try: (ns, name) = self.split_csymbol(ident) except ValueError as e: raise TransformerException(str(e)) if ns != self._namespace: raise TransformerException( "Skipping foreign symbol from namespace %s" % (ns.name, )) if hidden: return '_' + name return name def _traverse_one(self, symbol, stype=None, parent_symbol=None): assert isinstance(symbol, SourceSymbol), symbol if stype is None: stype = symbol.type if stype == CSYMBOL_TYPE_FUNCTION: return self._create_function(symbol) elif stype == CSYMBOL_TYPE_TYPEDEF: return self._create_typedef(symbol) elif stype == CSYMBOL_TYPE_STRUCT: return self._create_struct(symbol) elif stype == CSYMBOL_TYPE_ENUM: return self._create_enum(symbol) elif stype == CSYMBOL_TYPE_MEMBER: return self._create_member(symbol, parent_symbol) elif stype == CSYMBOL_TYPE_UNION: return self._create_union(symbol) elif stype == CSYMBOL_TYPE_CONST: return self._create_const(symbol) # Ignore variable declarations in the header elif stype == CSYMBOL_TYPE_OBJECT: pass else: print 'transformer: unhandled symbol: %r' % (symbol, ) def _enum_common_prefix(self, symbol): def common_prefix(a, b): commonparts = [] for aword, bword in zip(a.split('_'), b.split('_')): if aword != bword: return '_'.join(commonparts) + '_' commonparts.append(aword) return min(a, b) # Nothing less than 2 has a common prefix if len(list(symbol.base_type.child_list)) < 2: return None prefix = None for child in symbol.base_type.child_list: if prefix is None: prefix = child.ident else: prefix = common_prefix(prefix, child.ident) if prefix == '': return None return prefix def _create_enum(self, symbol): prefix = self._enum_common_prefix(symbol) if prefix: prefixlen = len(prefix) else: prefixlen = 0 members = [] for child in symbol.base_type.child_list: if child.private: continue if prefixlen > 0: name = child.ident[prefixlen:] else: # Ok, the enum members don't have a consistent prefix # among them, so let's just remove the global namespace # prefix. try: name = self._strip_symbol(child) except TransformerException as e: message.warn_symbol(symbol, e) return None members.append(ast.Member(name.lower(), child.const_int, child.ident, None)) try: enum_name = self.strip_identifier(symbol.ident) except TransformerException as e: message.warn_symbol(symbol, e) return None if symbol.base_type.is_bitfield: klass = ast.Bitfield else: klass = ast.Enum node = klass(enum_name, symbol.ident, members=members) node.add_symbol_reference(symbol) return node def _create_function(self, symbol): # Drop functions that start with _ very early on here if symbol.ident.startswith('_'): return None parameters = list(self._create_parameters(symbol, symbol.base_type)) return_ = self._create_return(symbol.base_type.base_type) try: name = self._strip_symbol(symbol) except TransformerException as e: message.warn_symbol(symbol, e) return None func = ast.Function(name, return_, parameters, False, symbol.ident) func.add_symbol_reference(symbol) return func def _create_source_type(self, source_type): assert source_type is not None if source_type.type == CTYPE_VOID: value = 'void' elif source_type.type == CTYPE_BASIC_TYPE: value = source_type.name elif source_type.type == CTYPE_TYPEDEF: value = source_type.name elif source_type.type == CTYPE_ARRAY: return self._create_source_type(source_type.base_type) elif source_type.type == CTYPE_POINTER: value = self._create_source_type(source_type.base_type) + '*' else: value = 'gpointer' return value def _create_complete_source_type(self, source_type): assert source_type is not None const = (source_type.type_qualifier & TYPE_QUALIFIER_CONST) volatile = (source_type.type_qualifier & TYPE_QUALIFIER_VOLATILE) if source_type.type == CTYPE_VOID: return 'void' elif source_type.type in [CTYPE_BASIC_TYPE, CTYPE_TYPEDEF, CTYPE_STRUCT, CTYPE_UNION, CTYPE_ENUM]: value = source_type.name if not value: value = 'gpointer' if const: value = 'const ' + value if volatile: value = 'volatile ' + value elif source_type.type == CTYPE_ARRAY: return self._create_complete_source_type(source_type.base_type) elif source_type.type == CTYPE_POINTER: value = self._create_complete_source_type(source_type.base_type) + '*' # TODO: handle pointer to function as a special case? if const: value += ' const' if volatile: value += ' volatile' else: if const: value = 'gconstpointer' else: value = 'gpointer' if volatile: value = 'volatile ' + value return value return value def _create_parameters(self, symbol, base_type): # warn if we see annotations for unknown parameters param_names = set(child.ident for child in base_type.child_list) for i, child in enumerate(base_type.child_list): yield self._create_parameter(symbol, i, child) def _synthesize_union_type(self, symbol, parent_symbol): # Synthesize a named union so that it can be referenced. parent_ident = parent_symbol.ident # FIXME: Should split_ctype_namespaces handle the hidden case? hidden = parent_ident.startswith('_') if hidden: parent_ident = parent_ident[1:] matches = self.split_ctype_namespaces(parent_ident) (namespace, parent_name) = matches[-1] assert namespace and parent_name if hidden: parent_name = '_' + parent_name fake_union = ast.Union("%s__%s__union" % (parent_name, symbol.ident)) # _parse_fields accesses .base_type.child_list, so we have to # pass symbol.base_type even though that refers to the array, not the # union. self._parse_fields(symbol.base_type, fake_union) self._append_new_node(fake_union) fake_type = ast.Type( target_giname="%s.%s" % (namespace.name, fake_union.name)) return fake_type def _create_member(self, symbol, parent_symbol=None): source_type = symbol.base_type if (source_type.type == CTYPE_POINTER and symbol.base_type.base_type.type == CTYPE_FUNCTION): node = self._create_callback(symbol, member=True) elif source_type.type == CTYPE_STRUCT and source_type.name is None: node = self._create_struct(symbol, anonymous=True) elif source_type.type == CTYPE_UNION and source_type.name is None: node = self._create_union(symbol, anonymous=True) else: # Special handling for fields; we don't have annotations on them # to apply later, yet. if source_type.type == CTYPE_ARRAY: complete_ctype = self._create_complete_source_type(source_type) # If the array contains anonymous unions, like in the GValue # struct, we need to handle this specially. This is necessary # to be able to properly calculate the size of the compound # type (e.g. GValue) that contains this array, see # . if (source_type.base_type.type == CTYPE_UNION and source_type.base_type.name is None): synthesized_type = self._synthesize_union_type(symbol, parent_symbol) ftype = ast.Array(None, synthesized_type, complete_ctype=complete_ctype) else: ctype = self._create_source_type(source_type) canonical_ctype = self._canonicalize_ctype(ctype) if canonical_ctype[-1] == '*': derefed_name = canonical_ctype[:-1] else: derefed_name = canonical_ctype if complete_ctype[-1] == '*': derefed_complete_ctype = complete_ctype[:-1] else: derefed_complete_ctype = complete_ctype from_ctype = self.create_type_from_ctype_string(ctype, complete_ctype=complete_ctype) ftype = ast.Array(None, from_ctype, ctype=derefed_name, complete_ctype=derefed_complete_ctype) child_list = list(symbol.base_type.child_list) ftype.zeroterminated = False if child_list: ftype.size = child_list[0].const_int else: ftype = self._create_type_from_base(symbol.base_type) # ast.Fields are assumed to be read-write # (except for Objects, see also glibtransformer.py) node = ast.Field(symbol.ident, ftype, readable=True, writable=True, bits=symbol.const_int) if symbol.private: node.readable = False node.writable = False node.private = True return node def _create_typedef(self, symbol): ctype = symbol.base_type.type if (ctype == CTYPE_POINTER and symbol.base_type.base_type.type == CTYPE_FUNCTION): node = self._create_typedef_callback(symbol) elif (ctype == CTYPE_POINTER and symbol.base_type.base_type.type == CTYPE_STRUCT): node = self._create_typedef_struct(symbol, disguised=True) elif ctype == CTYPE_STRUCT: node = self._create_typedef_struct(symbol) elif ctype == CTYPE_UNION: node = self._create_typedef_union(symbol) elif ctype == CTYPE_ENUM: return self._create_enum(symbol) elif ctype in (CTYPE_TYPEDEF, CTYPE_POINTER, CTYPE_BASIC_TYPE, CTYPE_VOID): try: name = self.strip_identifier(symbol.ident) except TransformerException as e: message.warn(e) return None if symbol.base_type.name: complete_ctype = self._create_complete_source_type(symbol.base_type) target = self.create_type_from_ctype_string(symbol.base_type.name, complete_ctype=complete_ctype) else: target = ast.TYPE_ANY if name in ast.type_names: return None return ast.Alias(name, target, ctype=symbol.ident) else: raise NotImplementedError( "symbol %r of type %s" % (symbol.ident, ctype_name(ctype))) return node def _canonicalize_ctype(self, ctype): # First look up the ctype including any pointers; # a few type names like 'char*' have their own aliases # and we need pointer information for those. firstpass = ast.type_names.get(ctype) # If we have a particular alias for this, skip deep # canonicalization to prevent changing # e.g. char* -> int8* if firstpass: return firstpass.target_fundamental if not ctype.endswith('*'): return ctype # We have a pointer type. # Strip the end pointer, canonicalize our base type base = ctype[:-1] canonical_base = self._canonicalize_ctype(base) # Append the pointer again canonical = canonical_base + '*' return canonical def parse_ctype(self, ctype, is_member=False): canonical = self._canonicalize_ctype(ctype) # Remove all pointers - we require standard calling # conventions. For example, an 'int' is always passed by # value (unless it's out or inout). derefed_typename = canonical.replace('*', '') # Preserve "pointerness" of struct/union members if (is_member and canonical.endswith('*') and derefed_typename in ast.basic_type_names): return 'gpointer' else: return derefed_typename def _create_type_from_base(self, source_type, is_parameter=False, is_return=False): ctype = self._create_source_type(source_type) complete_ctype = self._create_complete_source_type(source_type) const = ((source_type.type == CTYPE_POINTER) and (source_type.base_type.type_qualifier & TYPE_QUALIFIER_CONST)) return self.create_type_from_ctype_string(ctype, is_const=const, is_parameter=is_parameter, is_return=is_return, complete_ctype=complete_ctype) def _create_bare_container_type(self, base, ctype=None, is_const=False, complete_ctype=None): if base in ('GList', 'GSList', 'GLib.List', 'GLib.SList'): if base in ('GList', 'GSList'): name = 'GLib.' + base[1:] else: name = base return ast.List(name, ast.TYPE_ANY, ctype=ctype, is_const=is_const, complete_ctype=complete_ctype) elif base in ('GArray', 'GPtrArray', 'GByteArray', 'GLib.Array', 'GLib.PtrArray', 'GLib.ByteArray', 'GObject.Array', 'GObject.PtrArray', 'GObject.ByteArray'): if '.' in base: name = 'GLib.' + base.split('.', 1)[1] else: name = 'GLib.' + base[1:] return ast.Array(name, ast.TYPE_ANY, ctype=ctype, is_const=is_const, complete_ctype=complete_ctype) elif base in ('GHashTable', 'GLib.HashTable', 'GObject.HashTable'): return ast.Map(ast.TYPE_ANY, ast.TYPE_ANY, ctype=ctype, is_const=is_const, complete_ctype=complete_ctype) return None def create_type_from_ctype_string(self, ctype, is_const=False, is_parameter=False, is_return=False, complete_ctype=None): canonical = self._canonicalize_ctype(ctype) base = canonical.replace('*', '') # Special default: char ** -> ast.Array, same for GStrv if (is_return and canonical == 'utf8*') or base == 'GStrv': bare_utf8 = ast.TYPE_STRING.clone() bare_utf8.ctype = None return ast.Array(None, bare_utf8, ctype=ctype, is_const=is_const, complete_ctype=complete_ctype) fundamental = ast.type_names.get(base) if fundamental is not None: return ast.Type(target_fundamental=fundamental.target_fundamental, ctype=ctype, is_const=is_const, complete_ctype=complete_ctype) container = self._create_bare_container_type(base, ctype=ctype, is_const=is_const, complete_ctype=complete_ctype) if container: return container return ast.Type(ctype=ctype, is_const=is_const, complete_ctype=complete_ctype) def _create_parameter(self, parent_symbol, index, symbol): if symbol.type == CSYMBOL_TYPE_ELLIPSIS: ptype = ast.Varargs() else: ptype = self._create_type_from_base(symbol.base_type, is_parameter=True) if symbol.ident is None: if symbol.base_type and symbol.base_type.type != CTYPE_VOID: message.warn_symbol(parent_symbol, "missing parameter name; undocumentable") ident = 'arg%d' % (index, ) else: ident = symbol.ident return ast.Parameter(ident, ptype) def _create_return(self, source_type): typeval = self._create_type_from_base(source_type, is_return=True) return ast.Return(typeval) def _create_const(self, symbol): if symbol.ident.startswith('_'): return None # Don't create constants for non-public things # http://bugzilla.gnome.org/show_bug.cgi?id=572790 if (symbol.source_filename is None or not symbol.source_filename.endswith('.h')): return None try: name = self._strip_symbol(symbol) except TransformerException as e: message.warn_symbol(symbol, e) return None if symbol.const_string is not None: typeval = ast.TYPE_STRING value = unicode(symbol.const_string, 'utf-8') elif symbol.const_int is not None: if symbol.base_type is not None: typeval = self._create_type_from_base(symbol.base_type) else: typeval = ast.TYPE_INT unaliased = typeval self._resolve_type_from_ctype(unaliased) if typeval.target_giname and typeval.ctype: target = self.lookup_giname(typeval.target_giname) target = self.resolve_aliases(target) if isinstance(target, ast.Type): unaliased = target if unaliased == ast.TYPE_UINT64: value = str(symbol.const_int % 2**64) elif unaliased == ast.TYPE_UINT32: value = str(symbol.const_int % 2**32) elif unaliased == ast.TYPE_UINT16: value = str(symbol.const_int % 2**16) elif unaliased == ast.TYPE_UINT8: value = str(symbol.const_int % 2**16) else: value = str(symbol.const_int) elif symbol.const_double is not None: typeval = ast.TYPE_DOUBLE value = '%f' % (symbol.const_double, ) else: raise AssertionError() const = ast.Constant(name, typeval, value, symbol.ident) const.add_symbol_reference(symbol) return const def _create_typedef_struct(self, symbol, disguised=False): try: name = self.strip_identifier(symbol.ident) except TransformerException as e: message.warn_symbol(symbol, e) return None struct = ast.Record(name, symbol.ident, disguised=disguised) self._parse_fields(symbol, struct) struct.add_symbol_reference(symbol) self._typedefs_ns[symbol.ident] = struct return None def _create_typedef_union(self, symbol): try: name = self.strip_identifier(symbol.ident) except TransformerException as e: message.warn(e) return None union = ast.Union(name, symbol.ident) self._parse_fields(symbol, union) union.add_symbol_reference(symbol) self._typedefs_ns[symbol.ident] = union return None def _create_typedef_callback(self, symbol): callback = self._create_callback(symbol) if not callback: return None self._typedefs_ns[callback.name] = callback return callback def _parse_fields(self, symbol, compound): for child in symbol.base_type.child_list: child_node = self._traverse_one(child, parent_symbol=symbol) if not child_node: continue if isinstance(child_node, ast.Field): field = child_node else: field = ast.Field(child.ident, None, True, False, anonymous_node=child_node) compound.fields.append(field) def _create_compound(self, klass, symbol, anonymous): if symbol.ident is None: # the compound is an anonymous member of another union or a struct assert anonymous compound = klass(None, None) else: compound = self._typedefs_ns.get(symbol.ident, None) if compound is None: # This is a bit of a hack; really we should try # to resolve through the typedefs to find the real # name if symbol.ident.startswith('_'): compound = self._typedefs_ns.get(symbol.ident[1:], None) if compound is None: if anonymous: name = symbol.ident else: try: name = self.strip_identifier(symbol.ident) except TransformerException as e: message.warn(e) return None compound = klass(name, symbol.ident) self._parse_fields(symbol, compound) compound.add_symbol_reference(symbol) return compound def _create_struct(self, symbol, anonymous=False): return self._create_compound(ast.Record, symbol, anonymous) def _create_union(self, symbol, anonymous=False): return self._create_compound(ast.Union, symbol, anonymous) def _create_callback(self, symbol, member=False): parameters = list(self._create_parameters(symbol, symbol.base_type.base_type)) retval = self._create_return(symbol.base_type.base_type.base_type) # Mark the 'user_data' arguments for i, param in enumerate(parameters): if (param.type.target_fundamental == 'gpointer' and param.argname == 'user_data'): param.closure_name = param.argname if member: name = symbol.ident elif symbol.ident.find('_') > 0: try: name = self._strip_symbol(symbol) except TransformerException as e: message.warn_symbol(symbol, e) return None else: try: name = self.strip_identifier(symbol.ident) except TransformerException as e: message.warn(e) return None callback = ast.Callback(name, retval, parameters, False, ctype=symbol.ident) callback.add_symbol_reference(symbol) return callback def create_type_from_user_string(self, typestr): """Parse a C type string (as might be given from an annotation) and resolve it. For compatibility, we can consume both GI type string (utf8, Foo.Bar) style, as well as C (char *, FooBar) style. Note that type resolution may not succeed.""" if '.' in typestr: container = self._create_bare_container_type(typestr) if container: typeval = container else: typeval = self._namespace.type_from_name(typestr) else: typeval = self.create_type_from_ctype_string(typestr) self.resolve_type(typeval) if typeval.resolved: # Explicitly clear out the c_type; there isn't one in this case. typeval.ctype = None return typeval def _resolve_type_from_ctype_all_namespaces(self, typeval, pointer_stripped): # If we can't determine the namespace from the type name, # fall back to trying all of our includes. An example of this is mutter, # which has nominal namespace of "Meta", but a few classes are # "Mutter". We don't export that data in introspection currently. # Basically the library should be fixed, but we'll hack around it here. for namespace in self._parsed_includes.itervalues(): target = namespace.get_by_ctype(pointer_stripped) if target: typeval.target_giname = '%s.%s' % (namespace.name, target.name) return True return False def _resolve_type_from_ctype(self, typeval): assert typeval.ctype is not None pointer_stripped = typeval.ctype.replace('*', '') try: matches = self.split_ctype_namespaces(pointer_stripped) except ValueError: return self._resolve_type_from_ctype_all_namespaces(typeval, pointer_stripped) for namespace, name in matches: target = namespace.get(name) if not target: target = namespace.get_by_ctype(pointer_stripped) if target: typeval.target_giname = '%s.%s' % (namespace.name, target.name) return True return False def _resolve_type_from_gtype_name(self, typeval): assert typeval.gtype_name is not None for ns in self._iter_namespaces(): node = ns.type_names.get(typeval.gtype_name, None) if node is not None: typeval.target_giname = '%s.%s' % (ns.name, node.name) return True return False def _resolve_type_internal(self, typeval): if isinstance(typeval, (ast.Array, ast.List)): return self.resolve_type(typeval.element_type) elif isinstance(typeval, ast.Map): key_resolved = self.resolve_type(typeval.key_type) value_resolved = self.resolve_type(typeval.value_type) return key_resolved and value_resolved elif typeval.resolved: return True elif typeval.ctype: return self._resolve_type_from_ctype(typeval) elif typeval.gtype_name: return self._resolve_type_from_gtype_name(typeval) def resolve_type(self, typeval): if not self._resolve_type_internal(typeval): return False if typeval.target_fundamental or typeval.target_foreign: return True assert typeval.target_giname is not None try: type_ = self.lookup_giname(typeval.target_giname) except KeyError: type_ = None if type_ is None: typeval.target_giname = None return typeval.resolved def _typepair_to_str(self, item): nsname, item = item if nsname is None: return item.name return '%s.%s' % (nsname, item.name) def gtypename_to_giname(self, gtname, names): resolved = names.type_names.get(gtname) if resolved: return self._typepair_to_str(resolved) resolved = self._names.type_names.get(gtname) if resolved: return self._typepair_to_str(resolved) raise KeyError("Failed to resolve GType name: %r" % (gtname, )) def ctype_of(self, obj): if hasattr(obj, 'ctype'): return obj.ctype elif hasattr(obj, 'symbol'): return obj.symbol else: return None def resolve_aliases(self, typenode): """Removes all aliases from typenode, returns first non-alias in the typenode alias chain. Returns typenode argument if it is not an alias.""" while isinstance(typenode, ast.Alias): if typenode.target.target_giname is not None: typenode = self.lookup_giname(typenode.target.target_giname) elif typenode.target.target_fundamental is not None: typenode = ast.type_names[typenode.target.target_fundamental] else: break return typenode