#!/usr/bin/python
# glib-ginterface-gen.py: service-side interface generator
#
# Generate dbus-glib 0.x service GInterfaces from the Telepathy specification.
# The master copy of this program is in the telepathy-glib repository -
# please make any changes there.
#
# Copyright (C) 2006, 2007 Collabora Limited
#
# 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 2.1 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import sys
import os.path
import xml.dom.minidom
from libglibcodegen import Signature, type_to_gtype, cmp_by_name, \
camelcase_to_lower, NS_TP, dbus_gutils_wincaps_to_uscore, \
signal_to_marshal_name, method_to_glue_marshal_name
NS_TP = "http://telepathy.freedesktop.org/wiki/DbusSpec#extensions-v0"
class Generator(object):
def __init__(self, dom, prefix, basename, signal_marshal_prefix,
headers, end_headers, not_implemented_func,
allow_havoc):
self.dom = dom
self.__header = []
self.__body = []
assert prefix.endswith('_')
assert not signal_marshal_prefix.endswith('_')
# The main_prefix, sub_prefix thing is to get:
# FOO_ -> (FOO_, _)
# FOO_SVC_ -> (FOO_, _SVC_)
# but
# FOO_BAR/ -> (FOO_BAR_, _)
# FOO_BAR/SVC_ -> (FOO_BAR_, _SVC_)
if '/' in prefix:
main_prefix, sub_prefix = prefix.upper().split('/', 1)
prefix = prefix.replace('/', '_')
else:
main_prefix, sub_prefix = prefix.upper().split('_', 1)
self.MAIN_PREFIX_ = main_prefix + '_'
self._SUB_PREFIX_ = '_' + sub_prefix
self.Prefix_ = prefix
self.Prefix = prefix.replace('_', '')
self.prefix_ = prefix.lower()
self.PREFIX_ = prefix.upper()
self.signal_marshal_prefix = signal_marshal_prefix
self.headers = headers
self.end_headers = end_headers
self.not_implemented_func = not_implemented_func
self.allow_havoc = allow_havoc
def h(self, s):
self.__header.append(s)
def b(self, s):
self.__body.append(s)
def do_node(self, node):
node_name = node.getAttribute('name').replace('/', '')
node_name_mixed = self.node_name_mixed = node_name.replace('_', '')
node_name_lc = self.node_name_lc = node_name.lower()
node_name_uc = self.node_name_uc = node_name.upper()
interfaces = node.getElementsByTagName('interface')
assert len(interfaces) == 1, interfaces
interface = interfaces[0]
self.iface_name = interface.getAttribute('name')
tmp = interface.getAttribute('tp:implement-service')
if tmp == "no":
return
tmp = interface.getAttribute('tp:causes-havoc')
if tmp and not self.allow_havoc:
raise AssertionError('%s is %s' % (self.iface_name, tmp))
self.b('static const DBusGObjectInfo _%s%s_object_info;'
% (self.prefix_, node_name_lc))
self.b('')
methods = interface.getElementsByTagName('method')
signals = interface.getElementsByTagName('signal')
properties = interface.getElementsByTagName('property')
# Don't put properties in dbus-glib glue
glue_properties = []
self.b('struct _%s%sClass {' % (self.Prefix, node_name_mixed))
self.b(' GTypeInterface parent_class;')
for method in methods:
self.b(' %s %s;' % self.get_method_impl_names(method))
self.b('};')
self.b('')
if signals:
self.b('enum {')
for signal in signals:
self.b(' %s,' % self.get_signal_const_entry(signal))
self.b(' N_%s_SIGNALS' % node_name_uc)
self.b('};')
self.b('static guint %s_signals[N_%s_SIGNALS] = {0};'
% (node_name_lc, node_name_uc))
self.b('')
self.b('static void %s%s_base_init (gpointer klass);'
% (self.prefix_, node_name_lc))
self.b('')
self.b('GType')
self.b('%s%s_get_type (void)'
% (self.prefix_, node_name_lc))
self.b('{')
self.b(' static GType type = 0;')
self.b('')
self.b(' if (G_UNLIKELY (type == 0))')
self.b(' {')
self.b(' static const GTypeInfo info = {')
self.b(' sizeof (%s%sClass),' % (self.Prefix, node_name_mixed))
self.b(' %s%s_base_init, /* base_init */'
% (self.prefix_, node_name_lc))
self.b(' NULL, /* base_finalize */')
self.b(' NULL, /* class_init */')
self.b(' NULL, /* class_finalize */')
self.b(' NULL, /* class_data */')
self.b(' 0,')
self.b(' 0, /* n_preallocs */')
self.b(' NULL /* instance_init */')
self.b(' };')
self.b('')
self.b(' type = g_type_register_static (G_TYPE_INTERFACE,')
self.b(' "%s%s", &info, 0);' % (self.Prefix, node_name_mixed))
self.b(' }')
self.b('')
self.b(' return type;')
self.b('}')
self.b('')
self.h('/**')
self.h(' * %s%s:' % (self.Prefix, node_name_mixed))
self.h(' *')
self.h(' * Dummy typedef representing any implementation of this '
'interface.')
self.h(' */')
self.h('typedef struct _%s%s %s%s;'
% (self.Prefix, node_name_mixed, self.Prefix, node_name_mixed))
self.h('')
self.h('/**')
self.h(' * %s%sClass:' % (self.Prefix, node_name_mixed))
self.h(' *')
self.h(' * The class of %s%s.' % (self.Prefix, node_name_mixed))
self.h(' */')
self.h('typedef struct _%s%sClass %s%sClass;'
% (self.Prefix, node_name_mixed, self.Prefix, node_name_mixed))
self.h('')
self.h('GType %s%s_get_type (void);'
% (self.prefix_, node_name_lc))
gtype = self.current_gtype = \
self.MAIN_PREFIX_ + 'TYPE' + self._SUB_PREFIX_ + node_name_uc
classname = self.Prefix + node_name_mixed
self.h('#define %s \\\n (%s%s_get_type ())'
% (gtype, self.prefix_, node_name_lc))
self.h('#define %s%s(obj) \\\n'
' (G_TYPE_CHECK_INSTANCE_CAST((obj), %s, %s))'
% (self.PREFIX_, node_name_uc, gtype, classname))
self.h('#define %sIS%s%s(obj) \\\n'
' (G_TYPE_CHECK_INSTANCE_TYPE((obj), %s))'
% (self.MAIN_PREFIX_, self._SUB_PREFIX_, node_name_uc, gtype))
self.h('#define %s%s_GET_CLASS(obj) \\\n'
' (G_TYPE_INSTANCE_GET_INTERFACE((obj), %s, %sClass))'
% (self.PREFIX_, node_name_uc, gtype, classname))
self.h('')
self.h('')
base_init_code = []
for method in methods:
self.do_method(method)
for signal in signals:
base_init_code.extend(self.do_signal(signal))
self.b('static inline void')
self.b('%s%s_base_init_once (gpointer klass)'
% (self.prefix_, node_name_lc))
self.b('{')
self.b(' static TpDBusPropertiesMixinPropInfo properties[%d] = {'
% (len(properties) + 1))
for m in properties:
access = m.getAttribute('access')
assert access in ('read', 'write', 'readwrite')
if access == 'read':
flags = 'TP_DBUS_PROPERTIES_MIXIN_FLAG_READ'
elif access == 'write':
flags = 'TP_DBUS_PROPERTIES_MIXIN_FLAG_WRITE'
else:
flags = ('TP_DBUS_PROPERTIES_MIXIN_FLAG_READ | '
'TP_DBUS_PROPERTIES_MIXIN_FLAG_WRITE')
self.b(' { 0, %s, "%s", 0, NULL, NULL }, /* %s */'
% (flags, m.getAttribute('type'), m.getAttribute('name')))
self.b(' { 0, 0, NULL, 0, NULL, NULL }')
self.b(' };')
self.b(' static TpDBusPropertiesMixinIfaceInfo interface =')
self.b(' { 0, properties, NULL, NULL };')
self.b('')
self.b(' interface.dbus_interface = g_quark_from_static_string '
'("%s");' % self.iface_name)
for i, m in enumerate(properties):
self.b(' properties[%d].name = g_quark_from_static_string ("%s");'
% (i, m.getAttribute('name')))
self.b(' properties[%d].type = %s;'
% (i, type_to_gtype(m.getAttribute('type'))[1]))
self.b(' tp_svc_interface_set_dbus_properties_info (%s, &interface);'
% self.current_gtype)
self.b('')
for s in base_init_code:
self.b(s)
self.b(' dbus_g_object_type_install_info (%s%s_get_type (),'
% (self.prefix_, node_name_lc))
self.b(' &_%s%s_object_info);'
% (self.prefix_, node_name_lc))
self.b('}')
self.b('static void')
self.b('%s%s_base_init (gpointer klass)'
% (self.prefix_, node_name_lc))
self.b('{')
self.b(' static gboolean initialized = FALSE;')
self.b('')
self.b(' if (!initialized)')
self.b(' {')
self.b(' initialized = TRUE;')
self.b(' %s%s_base_init_once (klass);'
% (self.prefix_, node_name_lc))
self.b(' }')
# insert anything we need to do per implementation here
self.b('}')
self.h('')
self.b('static const DBusGMethodInfo _%s%s_methods[] = {'
% (self.prefix_, node_name_lc))
method_blob, offsets = self.get_method_glue(methods)
for method, offset in zip(methods, offsets):
self.do_method_glue(method, offset)
self.b('};')
self.b('')
self.b('static const DBusGObjectInfo _%s%s_object_info = {'
% (self.prefix_, node_name_lc))
self.b(' 0,') # version
self.b(' _%s%s_methods,' % (self.prefix_, node_name_lc))
self.b(' %d,' % len(methods))
self.b('"' + method_blob.replace('\0', '\\0') + '",')
self.b('"' + self.get_signal_glue(signals).replace('\0', '\\0') + '",')
self.b('"' +
self.get_property_glue(glue_properties).replace('\0', '\\0') +
'",')
self.b('};')
self.b('')
self.node_name_mixed = None
self.node_name_lc = None
self.node_name_uc = None
def get_method_glue(self, methods):
info = []
offsets = []
for method in methods:
offsets.append(len(''.join(info)))
info.append(self.iface_name + '\0')
info.append(method.getAttribute('name') + '\0')
info.append('A\0') # async
counter = 0
for arg in method.getElementsByTagName('arg'):
out = arg.getAttribute('direction') == 'out'
name = arg.getAttribute('name')
if not name:
assert out
name = 'arg%u' % counter
counter += 1
info.append(name + '\0')
if out:
info.append('O\0')
else:
info.append('I\0')
if out:
info.append('F\0') # not const
info.append('N\0') # not error or return
info.append(arg.getAttribute('type') + '\0')
info.append('\0')
return ''.join(info) + '\0', offsets
def do_method_glue(self, method, offset):
lc_name = camelcase_to_lower(method.getAttribute('name'))
marshaller = method_to_glue_marshal_name(method,
self.signal_marshal_prefix)
wrapper = self.prefix_ + self.node_name_lc + '_' + lc_name
self.b(" { (GCallback) %s, %s, %d }," % (wrapper, marshaller, offset))
def get_signal_glue(self, signals):
info = []
for signal in signals:
info.append(self.iface_name)
info.append(signal.getAttribute('name'))
return '\0'.join(info) + '\0\0'
# the implementation can be the same
get_property_glue = get_signal_glue
def get_method_impl_names(self, method):
dbus_method_name = method.getAttribute('name')
class_member_name = camelcase_to_lower(dbus_method_name)
stub_name = (self.prefix_ + self.node_name_lc + '_' +
class_member_name)
return (stub_name + '_impl', class_member_name)
def do_method(self, method):
assert self.node_name_mixed is not None
in_class = []
# Examples refer to Thing.DoStuff (su) -> ii
# DoStuff
dbus_method_name = method.getAttribute('name')
# do_stuff
class_member_name = camelcase_to_lower(dbus_method_name)
# void tp_svc_thing_do_stuff (TpSvcThing *, const char *, guint,
# DBusGMethodInvocation *);
stub_name = (self.prefix_ + self.node_name_lc + '_' +
class_member_name)
# typedef void (*tp_svc_thing_do_stuff_impl) (TpSvcThing *,
# const char *, guint, DBusGMethodInvocation);
impl_name = stub_name + '_impl'
# void tp_svc_thing_return_from_do_stuff (DBusGMethodInvocation *,
# gint, gint);
ret_name = (self.prefix_ + self.node_name_lc + '_return_from_' +
class_member_name)
# Gather arguments
in_args = []
out_args = []
for i in method.getElementsByTagName('arg'):
name = i.getAttribute('name')
direction = i.getAttribute('direction') or 'in'
dtype = i.getAttribute('type')
assert direction in ('in', 'out')
if name:
name = direction + '_' + name
elif direction == 'in':
name = direction + str(len(in_args))
else:
name = direction + str(len(out_args))
ctype, gtype, marshaller, pointer = type_to_gtype(dtype)
if pointer:
ctype = 'const ' + ctype
struct = (ctype, name)
if direction == 'in':
in_args.append(struct)
else:
out_args.append(struct)
# Implementation type declaration (in header, docs in body)
self.b('/**')
self.b(' * %s:' % impl_name)
self.b(' * @self: The object implementing this interface')
for (ctype, name) in in_args:
self.b(' * @%s: %s (FIXME, generate documentation)'
% (name, ctype))
self.b(' * @context: Used to return values or throw an error')
self.b(' *')
self.b(' * The signature of an implementation of the D-Bus method')
self.b(' * %s on interface %s.' % (dbus_method_name, self.iface_name))
self.b(' */')
self.h('typedef void (*%s) (%s%s *self,'
% (impl_name, self.Prefix, self.node_name_mixed))
for (ctype, name) in in_args:
self.h(' %s%s,' % (ctype, name))
self.h(' DBusGMethodInvocation *context);')
# Class member (in class definition)
in_class.append(' %s %s;' % (impl_name, class_member_name))
# Stub definition (in body only - it's static)
self.b('static void')
self.b('%s (%s%s *self,'
% (stub_name, self.Prefix, self.node_name_mixed))
for (ctype, name) in in_args:
self.b(' %s%s,' % (ctype, name))
self.b(' DBusGMethodInvocation *context)')
self.b('{')
self.b(' %s impl = (%s%s_GET_CLASS (self)->%s);'
% (impl_name, self.PREFIX_, self.node_name_uc, class_member_name))
self.b('')
self.b(' if (impl != NULL)')
tmp = ['self'] + [name for (ctype, name) in in_args] + ['context']
self.b(' {')
self.b(' (impl) (%s);' % ',\n '.join(tmp))
self.b(' }')
self.b(' else')
self.b(' {')
if self.not_implemented_func:
self.b(' %s (context);' % self.not_implemented_func)
else:
self.b(' GError e = { DBUS_GERROR, ')
self.b(' DBUS_GERROR_UNKNOWN_METHOD,')
self.b(' "Method not implemented" };')
self.b('')
self.b(' dbus_g_method_return_error (context, &e);')
self.b(' }')
self.b('}')
self.b('')
# Implementation registration (in both header and body)
self.h('void %s%s_implement_%s (%s%sClass *klass, %s impl);'
% (self.prefix_, self.node_name_lc, class_member_name,
self.Prefix, self.node_name_mixed, impl_name))
self.b('/**')
self.b(' * %s%s_implement_%s:'
% (self.prefix_, self.node_name_lc, class_member_name))
self.b(' * @klass: A class whose instances implement this interface')
self.b(' * @impl: A callback used to implement the %s D-Bus method'
% dbus_method_name)
self.b(' *')
self.b(' * Register an implementation for the %s method in the vtable'
% dbus_method_name)
self.b(' * of an implementation of this interface. To be called from')
self.b(' * the interface init function.')
self.b(' */')
self.b('void')
self.b('%s%s_implement_%s (%s%sClass *klass, %s impl)'
% (self.prefix_, self.node_name_lc, class_member_name,
self.Prefix, self.node_name_mixed, impl_name))
self.b('{')
self.b(' klass->%s = impl;' % class_member_name)
self.b('}')
self.b('')
# Return convenience function (static inline, in header)
self.h('/**')
self.h(' * %s:' % ret_name)
self.h(' * @context: The D-Bus method invocation context')
for (ctype, name) in out_args:
self.h(' * @%s: %s (FIXME, generate documentation)'
% (name, ctype))
self.h(' *')
self.h(' * Return successfully by calling dbus_g_method_return().')
self.h(' * This inline function exists only to provide type-safety.')
self.h(' */')
tmp = (['DBusGMethodInvocation *context'] +
[ctype + name for (ctype, name) in out_args])
self.h('static inline')
self.h('/* this comment is to stop gtkdoc realising this is static */')
self.h(('void %s (' % ret_name) + (',\n '.join(tmp)) + ');')
self.h('static inline void')
self.h(('%s (' % ret_name) + (',\n '.join(tmp)) + ')')
self.h('{')
tmp = ['context'] + [name for (ctype, name) in out_args]
self.h(' dbus_g_method_return (' + ',\n '.join(tmp) + ');')
self.h('}')
self.h('')
return in_class
def get_signal_const_entry(self, signal):
assert self.node_name_uc is not None
return ('SIGNAL_%s_%s'
% (self.node_name_uc, signal.getAttribute('name')))
def do_signal(self, signal):
assert self.node_name_mixed is not None
in_base_init = []
# for signal: Thing::StuffHappened (s, u)
# we want to emit:
# void tp_svc_thing_emit_stuff_happened (gpointer instance,
# const char *arg0, guint arg1);
dbus_name = signal.getAttribute('name')
stub_name = (self.prefix_ + self.node_name_lc + '_emit_' +
camelcase_to_lower(dbus_name))
const_name = self.get_signal_const_entry(signal)
# Gather arguments
args = []
for i in signal.getElementsByTagName('arg'):
name = i.getAttribute('name')
dtype = i.getAttribute('type')
tp_type = i.getAttribute('tp:type')
if name:
name = 'arg_' + name
else:
name = 'arg' + str(len(args))
ctype, gtype, marshaller, pointer = type_to_gtype(dtype)
if pointer:
ctype = 'const ' + ctype
struct = (ctype, name, gtype)
args.append(struct)
tmp = (['gpointer instance'] +
[ctype + name for (ctype, name, gtype) in args])
self.h(('void %s (' % stub_name) + (',\n '.join(tmp)) + ');')
# FIXME: emit docs
self.b('/**')
self.b(' * %s:' % stub_name)
self.b(' * @instance: The object implementing this interface')
for (ctype, name, gtype) in args:
self.b(' * @%s: %s (FIXME, generate documentation)'
% (name, ctype))
self.b(' *')
self.b(' * Type-safe wrapper around g_signal_emit to emit the')
self.b(' * %s signal on interface %s.'
% (dbus_name, self.iface_name))
self.b(' */')
self.b('void')
self.b(('%s (' % stub_name) + (',\n '.join(tmp)) + ')')
self.b('{')
self.b(' g_assert (instance != NULL);')
self.b(' g_assert (G_TYPE_CHECK_INSTANCE_TYPE (instance, %s));'
% (self.current_gtype))
tmp = (['instance', '%s_signals[%s]' % (self.node_name_lc, const_name),
'0'] + [name for (ctype, name, gtype) in args])
self.b(' g_signal_emit (' + ',\n '.join(tmp) + ');')
self.b('}')
self.b('')
in_base_init.append(' %s_signals[%s] ='
% (self.node_name_lc, const_name))
in_base_init.append(' g_signal_new ("%s",'
% (dbus_gutils_wincaps_to_uscore(dbus_name).replace('_', '-')))
in_base_init.append(' G_OBJECT_CLASS_TYPE (klass),')
in_base_init.append(' G_SIGNAL_RUN_LAST|G_SIGNAL_DETAILED,')
in_base_init.append(' 0,')
in_base_init.append(' NULL, NULL,')
in_base_init.append(' %s,'
% signal_to_marshal_name(signal, self.signal_marshal_prefix))
in_base_init.append(' G_TYPE_NONE,')
tmp = ['%d' % len(args)] + [gtype for (ctype, name, gtype) in args]
in_base_init.append(' %s);' % ',\n '.join(tmp))
in_base_init.append('')
return in_base_init
def __call__(self):
self.h('#include <glib-object.h>')
self.h('#include <dbus/dbus-glib.h>')
self.h('#include <telepathy-glib/dbus-properties-mixin.h>')
self.h('')
self.h('G_BEGIN_DECLS')
self.h('')
self.b('#include "%s.h"' % basename)
self.b('')
for header in self.headers:
self.b('#include %s' % header)
self.b('')
nodes = self.dom.getElementsByTagName('node')
nodes.sort(cmp_by_name)
for node in nodes:
self.do_node(node)
self.h('')
self.h('G_END_DECLS')
self.b('')
for header in self.end_headers:
self.b('#include %s' % header)
self.h('')
self.b('')
open(basename + '.h', 'w').write('\n'.join(self.__header))
open(basename + '.c', 'w').write('\n'.join(self.__body))
def cmdline_error():
print """\
usage:
gen-ginterface [OPTIONS] xmlfile Prefix_
options:
--include='<header.h>' (may be repeated)
--include='"header.h"' (ditto)
--include-end='"header.h"' (ditto)
Include extra headers in the generated .c file
--signal-marshal-prefix='prefix'
Use the given prefix on generated signal marshallers (default is
prefix.lower()).
--filename='BASENAME'
Set the basename for the output files (default is prefix.lower()
+ 'ginterfaces')
--not-implemented-func='symbol'
Set action when methods not implemented in the interface vtable are
called. symbol must have signature
void symbol (DBusGMethodInvocation *context)
and return some sort of "not implemented" error via
dbus_g_method_return_error (context, ...)
"""
sys.exit(1)
if __name__ == '__main__':
from getopt import gnu_getopt
options, argv = gnu_getopt(sys.argv[1:], '',
['filename=', 'signal-marshal-prefix=',
'include=', 'include-end=',
'allow-unstable',
'not-implemented-func='])
try:
prefix = argv[1]
except IndexError:
cmdline_error()
basename = prefix.lower() + 'ginterfaces'
signal_marshal_prefix = prefix.lower().rstrip('_')
headers = []
end_headers = []
not_implemented_func = ''
allow_havoc = False
for option, value in options:
if option == '--filename':
basename = value
elif option == '--signal-marshal-prefix':
signal_marshal_prefix = value
elif option == '--include':
if value[0] not in '<"':
value = '"%s"' % value
headers.append(value)
elif option == '--include-end':
if value[0] not in '<"':
value = '"%s"' % value
end_headers.append(value)
elif option == '--not-implemented-func':
not_implemented_func = value
elif option == '--allow-unstable':
allow_havoc = True
try:
dom = xml.dom.minidom.parse(argv[0])
except IndexError:
cmdline_error()
Generator(dom, prefix, basename, signal_marshal_prefix, headers,
end_headers, not_implemented_func, allow_havoc)()
