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Diffstat (limited to 'glib/dbus-gtype-specialized.c')
| -rw-r--r-- | glib/dbus-gtype-specialized.c | 441 |
1 files changed, 441 insertions, 0 deletions
diff --git a/glib/dbus-gtype-specialized.c b/glib/dbus-gtype-specialized.c new file mode 100644 index 00000000..b331fcc5 --- /dev/null +++ b/glib/dbus-gtype-specialized.c @@ -0,0 +1,441 @@ +/* -*- mode: C; c-file-style: "gnu" -*- */ +/* dbus-gtype-specialized.c: Non-DBus-specific functions for specialized GTypes + * + * Copyright (C) 2005 Red Hat, Inc. + * + * Licensed under the Academic Free License version 2.1 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include "dbus-gtype-specialized.h" +#include <glib.h> +#include <string.h> +#include <gobject/gvaluecollector.h> + +typedef enum { + DBUS_G_SPECTYPE_COLLECTION, + DBUS_G_SPECTYPE_MAP +} DBusGTypeSpecializedType; + +typedef struct { + DBusGTypeSpecializedType type; + const DBusGTypeSpecializedVtable *vtable; +} DBusGTypeSpecializedContainer; + +typedef struct { + GType types[6]; + const DBusGTypeSpecializedContainer *klass; +} DBusGTypeSpecializedData; + +static GHashTable /* char * -> data* */ *specialized_containers; + +static GQuark +specialized_type_data_quark () +{ + static GQuark quark; + if (!quark) + quark = g_quark_from_static_string ("DBusGTypeSpecializedData"); + + return quark; +} + +void +dbus_g_type_specialized_init (void) +{ + specialized_containers = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL); +} + +static gboolean +specialized_types_is_initialized (void) +{ + return specialized_containers != NULL; +} + +static DBusGTypeSpecializedData * +lookup_specialization_data (GType type) +{ + return g_type_get_qdata (type, specialized_type_data_quark ()); +} + +/* Copied from gboxed.c */ +static void +proxy_value_init (GValue *value) +{ + value->data[0].v_pointer = NULL; +} + +/* Adapted from gboxed.c */ +static void +proxy_value_free (GValue *value) +{ + if (value->data[0].v_pointer && !(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS)) + { + DBusGTypeSpecializedData *data; + GType type; + + type = G_VALUE_TYPE (value); + data = lookup_specialization_data (type); + g_assert (data != NULL); + + data->klass->vtable->free_func (type, value->data[0].v_pointer); + } +} + +/* Adapted from gboxed.c */ +static void +proxy_value_copy (const GValue *src_value, + GValue *dest_value) +{ + if (src_value->data[0].v_pointer) + { + DBusGTypeSpecializedData *data; + GType type; + type = G_VALUE_TYPE (src_value); + data = lookup_specialization_data (type); + g_assert (data != NULL); + dest_value->data[0].v_pointer = data->klass->vtable->copy_func (type, src_value->data[0].v_pointer); + } + else + dest_value->data[0].v_pointer = src_value->data[0].v_pointer; +} + +/* Copied from gboxed.c */ +static gpointer +proxy_value_peek_pointer (const GValue *value) +{ + return value->data[0].v_pointer; +} + +/* Adapted from gboxed.c */ +static gchar* +proxy_collect_value (GValue *value, + guint n_collect_values, + GTypeCValue *collect_values, + guint collect_flags) +{ + DBusGTypeSpecializedData *data; + GType type; + + type = G_VALUE_TYPE (value); + data = lookup_specialization_data (type); + + if (!collect_values[0].v_pointer) + value->data[0].v_pointer = NULL; + else + { + if (collect_flags & G_VALUE_NOCOPY_CONTENTS) + { + value->data[0].v_pointer = collect_values[0].v_pointer; + value->data[1].v_uint = G_VALUE_NOCOPY_CONTENTS; + } + else + value->data[0].v_pointer = data->klass->vtable->copy_func (type, collect_values[0].v_pointer); + } + + return NULL; +} + +/* Adapted from gboxed.c */ +static gchar* +proxy_lcopy_value (const GValue *value, + guint n_collect_values, + GTypeCValue *collect_values, + guint collect_flags) +{ + gpointer *boxed_p = collect_values[0].v_pointer; + + if (!boxed_p) + return g_strdup_printf ("value location for `%s' passed as NULL", G_VALUE_TYPE_NAME (value)); + + if (!value->data[0].v_pointer) + *boxed_p = NULL; + else if (collect_flags & G_VALUE_NOCOPY_CONTENTS) + *boxed_p = value->data[0].v_pointer; + else + { + DBusGTypeSpecializedData *data; + GType type; + + type = G_VALUE_TYPE (value); + data = lookup_specialization_data (type); + + *boxed_p = data->klass->vtable->copy_func (type, value->data[0].v_pointer); + } + + return NULL; +} + +static char * +build_specialization_name (const char *prefix, GType first_type, GType second_type) +{ + GString *fullname; + + fullname = g_string_new (prefix); + g_string_append_c (fullname, '+'); + g_string_append (fullname, g_type_name (first_type)); + if (second_type != G_TYPE_INVALID) + { + g_string_append_c (fullname, '+'); + g_string_append (fullname, g_type_name (second_type)); + } + return g_string_free (fullname, FALSE); +} + +static void +register_container (const char *name, + DBusGTypeSpecializedType type, + const DBusGTypeSpecializedVtable *vtable) +{ + DBusGTypeSpecializedContainer *klass; + + klass = g_new0 (DBusGTypeSpecializedContainer, 1); + klass->type = type; + klass->vtable = vtable; + + g_hash_table_insert (specialized_containers, g_strdup (name), klass); +} + +void +dbus_g_type_register_collection (const char *name, + const DBusGTypeSpecializedCollectionVtable *vtable, + guint flags) +{ + g_return_if_fail (specialized_types_is_initialized ()); + register_container (name, DBUS_G_SPECTYPE_COLLECTION, (const DBusGTypeSpecializedVtable*) vtable); +} + +void +dbus_g_type_register_map (const char *name, + const DBusGTypeSpecializedMapVtable *vtable, + guint flags) +{ + g_return_if_fail (specialized_types_is_initialized ()); + register_container (name, DBUS_G_SPECTYPE_MAP, (const DBusGTypeSpecializedVtable*) vtable); +} + +static GType +register_specialized_instance (const DBusGTypeSpecializedContainer *klass, + char *name, + GType first_type, + GType second_type) +{ + GType ret; + + static const GTypeValueTable vtable = + { + proxy_value_init, + proxy_value_free, + proxy_value_copy, + proxy_value_peek_pointer, + "p", + proxy_collect_value, + "p", + proxy_lcopy_value, + }; + static const GTypeInfo derived_info = + { + 0, /* class_size */ + NULL, /* base_init */ + NULL, /* base_finalize */ + NULL, /* class_init */ + NULL, /* class_finalize */ + NULL, /* class_data */ + 0, /* instance_size */ + 0, /* n_preallocs */ + NULL, /* instance_init */ + &vtable, /* value_table */ + }; + + ret = g_type_register_static (G_TYPE_BOXED, name, &derived_info, 0); + /* install proxy functions upon successfull registration */ + if (ret != G_TYPE_INVALID) + { + DBusGTypeSpecializedData *data; + data = g_new0 (DBusGTypeSpecializedData, 1); + data->types[0] = first_type; + data->types[1] = second_type; + data->klass = klass; + g_type_set_qdata (ret, specialized_type_data_quark (), data); + } + + return ret; +} + +static GType +lookup_or_register_specialized (const char *container, + GType first_type, + GType second_type) +{ + GType ret; + char *name; + const DBusGTypeSpecializedContainer *klass; + + g_return_val_if_fail (specialized_types_is_initialized (), G_TYPE_INVALID); + + klass = g_hash_table_lookup (specialized_containers, container); + g_return_val_if_fail (klass != NULL, G_TYPE_INVALID); + + name = build_specialization_name (container, first_type, second_type); + ret = g_type_from_name (name); + if (ret == G_TYPE_INVALID) + { + /* Take ownership of name */ + ret = register_specialized_instance (klass, name, + first_type, + second_type); + } + else + g_free (name); + return ret; +} + +GType +dbus_g_type_get_collection (const char *container, + GType specialization) +{ + return lookup_or_register_specialized (container, specialization, G_TYPE_INVALID); +} + +GType +dbus_g_type_get_map (const char *container, + GType key_specialization, + GType value_specialization) +{ + return lookup_or_register_specialized (container, key_specialization, value_specialization); +} + +gboolean +dbus_g_type_is_collection (GType gtype) +{ + DBusGTypeSpecializedData *data; + data = lookup_specialization_data (gtype); + if (data == NULL) + return FALSE; + return data->klass->type == DBUS_G_SPECTYPE_COLLECTION; +} + +gboolean +dbus_g_type_is_map (GType gtype) +{ + DBusGTypeSpecializedData *data; + data = lookup_specialization_data (gtype); + if (data == NULL) + return FALSE; + return data->klass->type == DBUS_G_SPECTYPE_MAP; +} + +static GType +get_specialization_index (GType gtype, guint i) +{ + DBusGTypeSpecializedData *data; + + data = lookup_specialization_data (gtype); + return data->types[i]; +} + +GType +dbus_g_type_get_collection_specialization (GType gtype) +{ + g_return_val_if_fail (dbus_g_type_is_collection (gtype), G_TYPE_INVALID); + return get_specialization_index (gtype, 0); +} + +GType +dbus_g_type_get_map_key_specialization (GType gtype) +{ + g_return_val_if_fail (dbus_g_type_is_map (gtype), G_TYPE_INVALID); + return get_specialization_index (gtype, 0); +} + +GType +dbus_g_type_get_map_value_specialization (GType gtype) +{ + g_return_val_if_fail (dbus_g_type_is_map (gtype), G_TYPE_INVALID); + return get_specialization_index (gtype, 1); +} + +gpointer +dbus_g_type_specialized_construct (GType type) +{ + DBusGTypeSpecializedData *data; + g_return_val_if_fail (specialized_types_is_initialized (), FALSE); + + data = lookup_specialization_data (type); + g_return_val_if_fail (data != NULL, FALSE); + + return data->klass->vtable->constructor (type); +} + +gboolean +dbus_g_type_collection_get_fixed (GValue *value, + gpointer *data_ret, + guint *len_ret) +{ + DBusGTypeSpecializedData *data; + GType gtype; + + g_return_val_if_fail (specialized_types_is_initialized (), FALSE); + g_return_val_if_fail (G_VALUE_HOLDS_BOXED (value), FALSE); + + gtype = G_VALUE_TYPE (value); + data = lookup_specialization_data (gtype); + g_return_val_if_fail (data != NULL, FALSE); + + return ((DBusGTypeSpecializedCollectionVtable *) (data->klass->vtable))->fixed_accessor (gtype, + g_value_get_boxed (value), + data_ret, len_ret); +} + +void +dbus_g_type_collection_value_iterate (GValue *value, + DBusGTypeSpecializedCollectionIterator iterator, + gpointer user_data) +{ + DBusGTypeSpecializedData *data; + GType gtype; + + g_return_if_fail (specialized_types_is_initialized ()); + g_return_if_fail (G_VALUE_HOLDS_BOXED (value)); + + gtype = G_VALUE_TYPE (value); + data = lookup_specialization_data (gtype); + g_return_if_fail (data != NULL); + + ((DBusGTypeSpecializedCollectionVtable *) data->klass->vtable)->iterator (gtype, + g_value_get_boxed (value), + iterator, user_data); +} + +void +dbus_g_type_map_value_iterate (GValue *value, + DBusGTypeSpecializedMapIterator iterator, + gpointer user_data) +{ + DBusGTypeSpecializedData *data; + GType gtype; + + g_return_if_fail (specialized_types_is_initialized ()); + g_return_if_fail (G_VALUE_HOLDS_BOXED (value)); + + gtype = G_VALUE_TYPE (value); + data = lookup_specialization_data (gtype); + g_return_if_fail (data != NULL); + + ((DBusGTypeSpecializedMapVtable *) data->klass->vtable)->iterator (gtype, + g_value_get_boxed (value), + iterator, user_data); +} |