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/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 1997-1999, 2000-2001 Tim Janik and Red Hat, Inc.
*
* 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.
*
* gvalue.h: generic GValue functions
*/
#ifndef __G_VALUE_H__
#define __G_VALUE_H__
#include <gobject/gtype.h>
G_BEGIN_DECLS
/* --- type macros --- */
#define G_TYPE_IS_VALUE(type) (g_type_value_table_peek (type) != NULL)
#define G_IS_VALUE(value) (G_TYPE_CHECK_VALUE (value))
#define G_VALUE_TYPE(value) (((GValue*) (value))->g_type)
#define G_VALUE_TYPE_NAME(value) (g_type_name (G_VALUE_TYPE (value)))
#define G_VALUE_HOLDS(value,type) (G_TYPE_CHECK_VALUE_TYPE ((value), (type)))
/* --- typedefs & structures --- */
typedef void (*GValueExchange) (GValue *value1,
GValue *value2);
typedef void (*GValueTransform) (const GValue *src_value,
GValue *dest_value);
struct _GValue
{
/*< private >*/
GType g_type;
/* public for GTypeValueTable methods */
union {
gint v_int;
guint v_uint;
glong v_long;
gulong v_ulong;
gfloat v_float;
gdouble v_double;
gpointer v_pointer;
} data[4];
};
/* --- prototypes --- */
GValue* g_value_init (GValue *value,
GType g_type);
void g_value_copy (const GValue *src_value,
GValue *dest_value);
GValue* g_value_reset (GValue *value);
void g_value_unset (GValue *value);
void g_value_set_instance (GValue *value,
gpointer instance);
/* --- private --- */
gboolean g_value_fits_pointer (const GValue *value);
gpointer g_value_peek_pointer (const GValue *value);
/* --- implementation details --- */
gboolean g_value_type_compatible (GType src_type,
GType dest_type);
gboolean g_value_type_transformable (GType src_type,
GType dest_type);
gboolean g_value_transform (const GValue *src_value,
GValue *dest_value);
void g_value_register_transform_func (GType src_type,
GType dest_type,
GValueTransform transform_func);
#define G_VALUE_NOCOPY_CONTENTS (1 << 27)
G_END_DECLS
#endif /* __G_VALUE_H__ */
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