sync code with last improvements from OpenBSD

proto/xcb-proto/xcbgen/matcher.py

@@ -0,0 +1,127 @@
+'''
+XML parser.  One function for each top-level element in the schema.
+
+Most functions just declare a new object and add it to the module.
+For typedefs, eventcopies, xidtypes, and other aliases though,
+we do not create a new type object, we just record the existing one under a new name.
+'''
+
+from os.path import join
+from sys import version_info
+
+if version_info[:2] >= (3, 3):
+    from xml.etree.ElementTree import parse
+else:
+    from xml.etree.cElementTree import parse
+
+from xcbgen.xtypes import *
+
+def import_(node, module, namespace):
+    '''
+    For imports, we load the file, create a new namespace object,
+    execute recursively, then record the import (for header files, etc.)
+    '''
+    # To avoid circular import error
+    from xcbgen import state
+    module.import_level = module.import_level + 1
+    new_file = join(namespace.dir, '%s.xml' % node.text)
+    new_root = parse(new_file).getroot()
+    new_namespace = state.Namespace(new_file)
+    execute(module, new_namespace)
+    module.import_level = module.import_level - 1
+    if not module.has_import(node.text):
+        module.add_import(node.text, new_namespace)
+
+def typedef(node, module, namespace):
+    id = node.get('newname')
+    name = namespace.prefix + (id,)
+    type = module.get_type(node.get('oldname'))
+    module.add_type(id, namespace.ns, name, type)
+
+def xidtype(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    type = module.get_type('CARD32')
+    module.add_type(id, namespace.ns, name, type)
+
+def xidunion(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    type = module.get_type('CARD32')
+    module.add_type(id, namespace.ns, name, type)
+
+def enum(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    type = Enum(name, node)
+    module.add_type(id, namespace.ns, name, type)
+
+def struct(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    type = Struct(name, node)
+    module.add_type(id, namespace.ns, name, type)
+
+def eventstruct(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    type = EventStruct(name, node)
+    module.add_type(id, namespace.ns, name, type)
+
+def union(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    type = Union(name, node)
+    module.add_type(id, namespace.ns, name, type)
+
+def request(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    type = Request(name, node)
+    module.add_request(id, name, type)
+
+def event(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    event = Event(name, node)
+    event.add_opcode(node.get('number'), name, True)
+    module.add_event(id, name, event)
+
+def eventcopy(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    event = module.get_event(node.get('ref'))
+    event.add_opcode(node.get('number'), name, False)
+    module.add_event(id, name, event)
+
+def error(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    error = Error(name, node)
+    error.add_opcode(node.get('number'), name, True)
+    module.add_error(id, name, error)
+
+def errorcopy(node, module, namespace):
+    id = node.get('name')
+    name = namespace.prefix + (id,)
+    error = module.get_error(node.get('ref'))
+    error.add_opcode(node.get('number'), name, False)
+    module.add_error(id, name, error)
+
+funcs = {'import' : import_,
+         'typedef' : typedef,
+         'xidtype' : xidtype,
+         'xidunion' : xidunion,
+         'enum' : enum,
+         'struct' : struct,
+         'eventstruct' : eventstruct,
+         'union' : union,
+         'request' : request,
+         'event' : event,
+         'eventcopy' : eventcopy,
+         'error' : error,
+         'errorcopy' : errorcopy}
+
+def execute(module, namespace):
+    for elt in list(namespace.root):
+        funcs[elt.tag](elt, module, namespace)