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Diffstat (limited to 'glib/dbus-gvalue-utils.c')
-rw-r--r-- | glib/dbus-gvalue-utils.c | 715 |
1 files changed, 715 insertions, 0 deletions
diff --git a/glib/dbus-gvalue-utils.c b/glib/dbus-gvalue-utils.c new file mode 100644 index 00000000..9eea4bf0 --- /dev/null +++ b/glib/dbus-gvalue-utils.c @@ -0,0 +1,715 @@ +/* -*- mode: C; c-file-style: "gnu" -*- */ +/* dbus-gvalue-utils.c: Non-DBus-specific functions related to GType/GValue + * + * 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/dbus-glib.h" +#include "dbus-gvalue-utils.h" +#include <glib.h> +#include <string.h> +#include <gobject/gvaluecollector.h> + + +static guint +fixed_type_get_size (GType type) +{ + switch (type) + { + case G_TYPE_CHAR: + case G_TYPE_UCHAR: + return sizeof (gchar); + case G_TYPE_BOOLEAN: + return sizeof (gboolean); + case G_TYPE_LONG: + case G_TYPE_ULONG: + return sizeof (glong); + case G_TYPE_INT: + case G_TYPE_UINT: + return sizeof (gint); + case G_TYPE_INT64: + case G_TYPE_UINT64: + return sizeof (gint64); + case G_TYPE_FLOAT: + return sizeof (gfloat); + case G_TYPE_DOUBLE: + return sizeof (gdouble); + default: + return 0; + } +} + +gboolean +dbus_g_type_is_fixed (GType type) +{ + return fixed_type_get_size (type) > 0; +} + +guint +dbus_g_type_fixed_get_size (GType type) +{ + g_assert (dbus_g_type_is_fixed (type)); + return fixed_type_get_size (type); +} + +gboolean +dbus_gvalue_store (GValue *value, + gpointer storage) +{ + /* FIXME - can we use the GValue lcopy_value method + * to do this in a cleaner way? + */ + switch (g_type_fundamental (G_VALUE_TYPE (value))) + { + case G_TYPE_CHAR: + *((gchar *) storage) = g_value_get_char (value); + return TRUE; + case G_TYPE_UCHAR: + *((guchar *) storage) = g_value_get_uchar (value); + return TRUE; + case G_TYPE_BOOLEAN: + *((gboolean *) storage) = g_value_get_boolean (value); + return TRUE; + case G_TYPE_LONG: + *((glong *) storage) = g_value_get_long (value); + return TRUE; + case G_TYPE_ULONG: + *((gulong *) storage) = g_value_get_ulong (value); + return TRUE; + case G_TYPE_INT: + *((gint *) storage) = g_value_get_int (value); + return TRUE; + case G_TYPE_UINT: + *((guint *) storage) = g_value_get_uint (value); + return TRUE; + case G_TYPE_INT64: + *((gint64 *) storage) = g_value_get_int64 (value); + return TRUE; + case G_TYPE_UINT64: + *((guint64 *) storage) = g_value_get_uint64 (value); + return TRUE; + case G_TYPE_DOUBLE: + *((gdouble *) storage) = g_value_get_double (value); + return TRUE; + case G_TYPE_STRING: + *((gchar **) storage) = (char*) g_value_get_string (value); + return TRUE; + case G_TYPE_POINTER: + *((gpointer *) storage) = g_value_get_pointer (value); + return TRUE; + case G_TYPE_OBJECT: + *((gpointer *) storage) = g_value_get_object (value); + return TRUE; + case G_TYPE_BOXED: + *((gpointer *) storage) = g_value_get_boxed (value); + return TRUE; + default: + return FALSE; + } +} + +gboolean +dbus_gvalue_set_from_pointer (GValue *value, + gconstpointer storage) +{ + /* FIXME - is there a better way to do this? */ + switch (g_type_fundamental (G_VALUE_TYPE (value))) + { + case G_TYPE_CHAR: + g_value_set_char (value, *((gchar *) storage)); + return TRUE; + case G_TYPE_UCHAR: + g_value_set_uchar (value, *((guchar *) storage)); + return TRUE; + case G_TYPE_BOOLEAN: + g_value_set_boolean (value, *((gboolean *) storage)); + return TRUE; + case G_TYPE_LONG: + g_value_set_long (value, *((glong *) storage)); + return TRUE; + case G_TYPE_ULONG: + g_value_set_ulong (value, *((gulong *) storage)); + return TRUE; + case G_TYPE_INT: + g_value_set_int (value, *((gint *) storage)); + return TRUE; + case G_TYPE_UINT: + g_value_set_uint (value, *((guint *) storage)); + return TRUE; + case G_TYPE_INT64: + g_value_set_int64 (value, *((gint64 *) storage)); + return TRUE; + case G_TYPE_UINT64: + g_value_set_uint64 (value, *((guint64 *) storage)); + return TRUE; + case G_TYPE_DOUBLE: + g_value_set_double (value, *((gdouble *) storage)); + return TRUE; + case G_TYPE_STRING: + g_value_set_string (value, *((gchar **) storage)); + return TRUE; + case G_TYPE_POINTER: + g_value_set_pointer (value, *((gpointer *) storage)); + return TRUE; + case G_TYPE_OBJECT: + g_value_set_object (value, *((gpointer *) storage)); + return TRUE; + case G_TYPE_BOXED: + g_value_set_boxed (value, *((gpointer *) storage)); + return TRUE; + default: + return FALSE; + } +} + +gboolean +dbus_gvalue_take (GValue *value, + GTypeCValue *cvalue) +{ + GType g_type; + GTypeValueTable *value_table; + char *error_msg; + + g_type = G_VALUE_TYPE (value); + value_table = g_type_value_table_peek (g_type); + + error_msg = value_table->collect_value (value, 1, cvalue, G_VALUE_NOCOPY_CONTENTS); + if (error_msg) + { + g_warning ("%s: %s", G_STRLOC, error_msg); + g_free (error_msg); + return FALSE; + } + /* Clear the NOCOPY_CONTENTS flag; we want to take ownership + * of the value. + */ + value->data[1].v_uint &= ~(G_VALUE_NOCOPY_CONTENTS); + return TRUE; +} + +static gboolean +hash_func_from_gtype (GType gtype, GHashFunc *func) +{ + switch (gtype) + { + case G_TYPE_CHAR: + case G_TYPE_UCHAR: + case G_TYPE_BOOLEAN: + case G_TYPE_INT: + case G_TYPE_UINT: + *func = NULL; + return TRUE; + case G_TYPE_STRING: + *func = g_str_hash; + return TRUE; + default: + return FALSE; + } +} + +static gboolean +hash_free_from_gtype (GType gtype, GDestroyNotify *func) +{ + switch (gtype) + { + case G_TYPE_CHAR: + case G_TYPE_UCHAR: + case G_TYPE_BOOLEAN: + case G_TYPE_INT: + case G_TYPE_UINT: + *func = NULL; + return TRUE; + case G_TYPE_STRING: + *func = g_free; + return TRUE; + default: + if (gtype == G_TYPE_VALUE) + { + *func = (GDestroyNotify) g_value_unset; + return TRUE; + } + return FALSE; + } +} + +gboolean +dbus_gtype_is_valid_hash_key (GType type) +{ + GHashFunc func; + return hash_func_from_gtype (type, &func); +} + +gboolean +dbus_gtype_is_valid_hash_value (GType type) +{ + GDestroyNotify func; + return hash_free_from_gtype (type, &func); +} + +GHashFunc +dbus_g_hash_func_from_gtype (GType gtype) +{ + GHashFunc func; + gboolean ret; + ret = hash_func_from_gtype (gtype, &func); + g_assert (ret != FALSE); + return func; +} + +GEqualFunc +dbus_g_hash_equal_from_gtype (GType gtype) +{ + g_assert (dbus_gtype_is_valid_hash_key (gtype)); + + switch (gtype) + { + case G_TYPE_CHAR: + case G_TYPE_UCHAR: + case G_TYPE_BOOLEAN: + case G_TYPE_INT: + case G_TYPE_UINT: + return NULL; + case G_TYPE_STRING: + return g_str_equal; + default: + g_assert_not_reached (); + return NULL; + } +} + +GDestroyNotify +dbus_g_hash_free_from_gtype (GType gtype) +{ + GDestroyNotify func; + gboolean ret; + ret = hash_free_from_gtype (gtype, &func); + g_assert (ret != FALSE); + return func; +} + +static void +gvalue_from_hash_value (GValue *value, gpointer instance) +{ + switch (g_type_fundamental (G_VALUE_TYPE (value))) + { + case G_TYPE_CHAR: + g_value_set_char (value, (gchar) GPOINTER_TO_INT (instance)); + break; + case G_TYPE_UCHAR: + g_value_set_uchar (value, (guchar) GPOINTER_TO_UINT (instance)); + break; + case G_TYPE_BOOLEAN: + g_value_set_boolean (value, (gboolean) GPOINTER_TO_UINT (instance)); + break; + case G_TYPE_INT: + g_value_set_int (value, GPOINTER_TO_INT (instance)); + break; + case G_TYPE_UINT: + g_value_set_uint (value, GPOINTER_TO_UINT (instance)); + break; + case G_TYPE_STRING: + g_value_set_static_string (value, instance); + break; + case G_TYPE_POINTER: + g_value_set_pointer (value, instance); + break; + case G_TYPE_BOXED: + g_value_set_static_boxed (value, instance); + break; + case G_TYPE_OBJECT: + g_value_set_object (value, instance); + g_object_unref (g_value_get_object (value)); + break; + default: + g_assert_not_reached (); + break; + } +} + +static gpointer +hash_value_from_gvalue (GValue *value) +{ + switch (g_type_fundamental (G_VALUE_TYPE (value))) + { + case G_TYPE_CHAR: + return GINT_TO_POINTER ((int) g_value_get_char (value)); + break; + case G_TYPE_UCHAR: + return GUINT_TO_POINTER ((guint) g_value_get_uchar (value)); + break; + case G_TYPE_BOOLEAN: + return GUINT_TO_POINTER ((guint) g_value_get_boolean (value)); + break; + case G_TYPE_INT: + return GINT_TO_POINTER (g_value_get_int (value)); + break; + case G_TYPE_UINT: + return GUINT_TO_POINTER (g_value_get_uint (value)); + break; + case G_TYPE_STRING: + return (gpointer) g_value_get_string (value); + break; + case G_TYPE_POINTER: + return g_value_get_pointer (value); + break; + case G_TYPE_BOXED: + return g_value_get_boxed (value); + break; + case G_TYPE_OBJECT: + return g_value_get_object (value); + break; + default: + g_assert_not_reached (); + return NULL; + } +} + +struct DBusGHashTableValueForeachData +{ + DBusGTypeSpecializedMapIterator func; + GType key_type; + GType value_type; + gpointer data; +}; + +static void +hashtable_foreach_with_values (gpointer key, gpointer value, gpointer user_data) +{ + GValue key_val = {0, }; + GValue value_val = {0, }; + struct DBusGHashTableValueForeachData *data = user_data; + + g_value_init (&key_val, data->key_type); + g_value_init (&value_val, data->value_type); + gvalue_from_hash_value (&key_val, key); + gvalue_from_hash_value (&value_val, value); + + data->func (&key_val, &value_val, data->data); +} + + +static void +hashtable_iterator (GType hash_type, + gpointer instance, + DBusGTypeSpecializedMapIterator iterator, + gpointer user_data) +{ + struct DBusGHashTableValueForeachData data; + GType key_gtype; + GType value_gtype; + + key_gtype = dbus_g_type_get_map_key_specialization (hash_type); + value_gtype = dbus_g_type_get_map_value_specialization (hash_type); + + data.func = iterator; + data.key_type = key_gtype; + data.value_type = value_gtype; + data.data = user_data; + + g_hash_table_foreach (instance, hashtable_foreach_with_values, &data); +} + +void +dbus_g_hash_table_insert_steal_values (GHashTable *table, + GValue *key_val, + GValue *value_val) +{ + gpointer key, val; + + key = hash_value_from_gvalue (key_val); + val = hash_value_from_gvalue (value_val); + + g_hash_table_insert (table, key, val); +} + +static gpointer +hashtable_constructor (GType type) +{ + GHashTable *ret; + GType key_gtype; + GType value_gtype; + + key_gtype = dbus_g_type_get_map_key_specialization (type); + value_gtype = dbus_g_type_get_map_value_specialization (type); + + ret = g_hash_table_new_full (dbus_g_hash_func_from_gtype (key_gtype), + dbus_g_hash_equal_from_gtype (key_gtype), + dbus_g_hash_free_from_gtype (key_gtype), + dbus_g_hash_free_from_gtype (value_gtype)); + return ret; +} + +static void +hashtable_insert_values (GHashTable *table, + const GValue *key_val, + const GValue *value_val) +{ + GValue key_copy = {0, }; + GValue value_copy = {0, }; + + g_value_init (&key_copy, G_VALUE_TYPE (key_val)); + g_value_copy (key_val, &key_copy); + g_value_init (&value_copy, G_VALUE_TYPE (value_val)); + g_value_copy (value_val, &value_copy); + + dbus_g_hash_table_insert_steal_values (table, &key_copy, &value_copy); +} + +static void +hashtable_foreach_copy (const GValue *key, const GValue *val, gpointer data) +{ + hashtable_insert_values ((GHashTable *) data, key, val); +} + +static gpointer +hashtable_copy (GType type, gpointer src) +{ + GHashTable *ghash; + GHashTable *ret; + GValue hashval = {0,}; + + ghash = src; + + ret = hashtable_constructor (type); + + g_value_init (&hashval, type); + g_value_set_static_boxed (&hashval, ghash); + dbus_g_type_map_value_iterate (&hashval, hashtable_foreach_copy, ret); + return ret; +} + +static void +hashtable_free (GType type, gpointer val) +{ + g_hash_table_destroy (val); +} + +static gpointer +array_constructor (GType type) +{ + GArray *array; + guint elt_size; + GType elt_type; + gboolean zero_terminated; + gboolean clear; + + elt_type = dbus_g_type_get_collection_specialization (type); + g_assert (elt_type != G_TYPE_INVALID); + + elt_size = dbus_g_type_fixed_get_size (elt_type); + + /* These are "safe" defaults */ + zero_terminated = TRUE; /* ((struct _DBusGRealArray*) garray)->zero_terminated; */ + clear = TRUE; /* ((struct _DBusGRealArray*) garray)->clear; */ + + array = g_array_new (zero_terminated, clear, elt_size); + return array; +} + +static gpointer +array_copy (GType type, gpointer src) +{ + GArray *garray; + GArray *new; + + garray = src; + + new = array_constructor (type); + g_array_append_vals (new, garray->data, garray->len); + + return new; +} + +static void +array_free (GType type, gpointer val) +{ + GArray *array; + array = val; + g_array_free (array, TRUE); +} + +static gboolean +array_fixed_accessor (GType type, gpointer instance, gpointer *values, guint *len) +{ + GType elt_type; + GArray *array = instance; + + elt_type = dbus_g_type_get_collection_specialization (type); + if (!dbus_g_type_is_fixed (elt_type)) + return FALSE; + + *values = array->data; + *len = array->len; + return TRUE; +} + +static gpointer +ptrarray_constructor (GType type) +{ + /* Later we should determine a destructor, need g_ptr_array_destroy */ + return g_ptr_array_new (); +} + +static void +gvalue_from_ptrarray_value (GValue *value, gpointer instance) +{ + switch (g_type_fundamental (G_VALUE_TYPE (value))) + { + case G_TYPE_POINTER: + g_value_set_pointer (value, instance); + break; + case G_TYPE_BOXED: + g_value_set_static_boxed (value, instance); + break; + case G_TYPE_OBJECT: + g_value_set_object (value, instance); + g_object_unref (g_value_get_object (value)); + break; + default: + g_assert_not_reached (); + break; + } +} + +static gpointer +ptrarray_value_from_gvalue (const GValue *value) +{ + switch (g_type_fundamental (G_VALUE_TYPE (value))) + { + case G_TYPE_POINTER: + return g_value_get_pointer (value); + break; + case G_TYPE_BOXED: + return g_value_get_boxed (value); + break; + case G_TYPE_OBJECT: + return g_value_get_object (value); + break; + default: + g_assert_not_reached (); + return NULL; + } +} + +static void +ptrarray_iterator (GType hash_type, + gpointer instance, + DBusGTypeSpecializedCollectionIterator iterator, + gpointer user_data) +{ + GPtrArray *ptrarray; + GType elt_gtype; + guint i; + + ptrarray = instance; + + elt_gtype = dbus_g_type_get_collection_specialization (hash_type); + + for (i = 0; i < ptrarray->len; i++) + { + GValue val = {0, }; + g_value_init (&val, elt_gtype); + gvalue_from_ptrarray_value (&val, g_ptr_array_index (ptrarray, i)); + iterator (&val, user_data); + } +} + +static void +ptrarray_copy_elt (const GValue *val, gpointer user_data) +{ + GPtrArray *dest = user_data; + GValue val_copy = {0, }; + + g_value_init (&val_copy, G_VALUE_TYPE (val)); + g_value_copy (val, &val_copy); + + g_ptr_array_add (dest, ptrarray_value_from_gvalue (&val_copy)); +} + +static gpointer +ptrarray_copy (GType type, gpointer src) +{ + GPtrArray *new; + GValue array_val = {0, }; + + g_value_init (&array_val, type); + g_value_set_static_boxed (&array_val, src); + + new = ptrarray_constructor (type); + dbus_g_type_collection_value_iterate (&array_val, ptrarray_copy_elt, new); + + return new; +} + +static void +ptrarray_free (GType type, gpointer val) +{ + GArray *array; + array = val; + g_array_free (array, TRUE); +} + +void +dbus_g_type_specialized_builtins_init (void) +{ + static const DBusGTypeSpecializedCollectionVtable array_vtable = { + { + array_constructor, + array_free, + array_copy, + NULL, + NULL, + NULL + }, + array_fixed_accessor, + NULL + }; + + dbus_g_type_register_collection ("GArray", &array_vtable, 0); + + static const DBusGTypeSpecializedCollectionVtable ptrarray_vtable = { + { + ptrarray_constructor, + ptrarray_free, + ptrarray_copy, + NULL, + NULL, + NULL + }, + NULL, + ptrarray_iterator + }; + + dbus_g_type_register_collection ("GPtrArray", &ptrarray_vtable, 0); + + static const DBusGTypeSpecializedMapVtable hashtable_vtable = { + { + hashtable_constructor, + hashtable_free, + hashtable_copy, + NULL, + NULL, + NULL + }, + hashtable_iterator + }; + + dbus_g_type_register_map ("GHashTable", &hashtable_vtable, 0); +} |