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gtk2/gtk/gtktypeutils.h
Tim Janik 983335243b removed Paolo Molaro's type creation hooks again, since they 1) don't care 
Mon Jan 11 13:31:49 1999  Tim Janik  <timj@gtk.org>

        * gtk/gtktypeutils.[hc]: removed Paolo Molaro's type creation hooks
        again, since they 1) don't care about infinite recursion (likely
        to achive), 2) we are in feature freeze for 1.2. this definitely
        deserves a sane implementation in 1.3 though (but without a hook
        return value, without seq_id hackery and with recursion checks).
1999-01-11 12:43:07 +00:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#ifndef __GTK_TYPE_UTILS_H__
#define __GTK_TYPE_UTILS_H__
#include <glib.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Fundamental Types
*/
typedef enum
{
GTK_TYPE_INVALID,
GTK_TYPE_NONE,
/* flat types */
GTK_TYPE_CHAR,
GTK_TYPE_UCHAR,
GTK_TYPE_BOOL,
GTK_TYPE_INT,
GTK_TYPE_UINT,
GTK_TYPE_LONG,
GTK_TYPE_ULONG,
GTK_TYPE_FLOAT,
GTK_TYPE_DOUBLE,
GTK_TYPE_STRING,
GTK_TYPE_ENUM,
GTK_TYPE_FLAGS,
GTK_TYPE_BOXED,
GTK_TYPE_POINTER,
/* structured types */
GTK_TYPE_SIGNAL,
GTK_TYPE_ARGS,
GTK_TYPE_CALLBACK,
GTK_TYPE_C_CALLBACK,
GTK_TYPE_FOREIGN,
/* base type node of the object system */
GTK_TYPE_OBJECT
} GtkFundamentalType;
/* bounds definitions for type sets, these are provided to distinct
* between fundamental types with if() statements, and to build
* up foreign fundamentals
*/
#define GTK_TYPE_FLAT_FIRST GTK_TYPE_CHAR
#define GTK_TYPE_FLAT_LAST GTK_TYPE_POINTER
#define GTK_TYPE_STRUCTURED_FIRST GTK_TYPE_SIGNAL
#define GTK_TYPE_STRUCTURED_LAST GTK_TYPE_FOREIGN
#define GTK_TYPE_FUNDAMENTAL_LAST GTK_TYPE_OBJECT
#define GTK_TYPE_FUNDAMENTAL_MAX (32)
/* retrive a structure offset */
#ifdef offsetof
#define GTK_STRUCT_OFFSET(struct, field) ((gint) offsetof (struct, field))
#else /* !offsetof */
#define GTK_STRUCT_OFFSET(struct, field) ((gint) ((gchar*) &((struct*) 0)->field))
#endif /* !offsetof */
/* The debugging versions of the casting macros make sure the cast is "ok"
* before proceeding, but they are definately slower than their less
* careful counterparts as they involve extra ``is a'' checks.
*/
#ifdef GTK_NO_CHECK_CASTS
# define GTK_CHECK_CAST(tobj, cast_type, cast) ((cast*) (tobj))
# define GTK_CHECK_CLASS_CAST(tclass,cast_type,cast) ((cast*) (tclass))
#else /* !GTK_NO_CHECK_CASTS */
# define GTK_CHECK_CAST(tobj, cast_type, cast) \
((cast*) gtk_type_check_object_cast ((GtkTypeObject*) (tobj), (cast_type)))
# define GTK_CHECK_CLASS_CAST(tclass,cast_type,cast) \
((cast*) gtk_type_check_class_cast ((GtkTypeClass*) (tclass), (cast_type)))
#endif /* GTK_NO_CHECK_CASTS */
/* Determines whether `type_object' and `type_class' are a type of `otype'.
*/
#define GTK_CHECK_TYPE(type_object, otype) ( \
gtk_type_is_a (((GtkTypeObject*) (type_object))->klass->type, (otype)) \
)
#define GTK_CHECK_CLASS_TYPE(type_class, otype) ( \
gtk_type_is_a (((GtkTypeClass*) (type_class))->type, (otype)) \
)
/* A GtkType holds a unique type id
*/
typedef guint GtkType;
typedef struct _GtkTypeObject GtkTypeObject;
typedef struct _GtkTypeClass GtkTypeClass;
/* Builtin Types
*/
#include <gtk/gtktypebuiltins.h>
#define GTK_TYPE_IDENTIFIER (gtk_identifier_get_type ())
GtkType gtk_identifier_get_type (void);
/* Macros
*/
#define GTK_TYPE_MAKE(parent_t, seqno) (((seqno) << 8) | GTK_FUNDAMENTAL_TYPE (parent_t))
#define GTK_FUNDAMENTAL_TYPE(type) ((GtkFundamentalType) ((type) & 0xFF))
#define GTK_TYPE_SEQNO(type) ((type) > 0xFF ? (type) >> 8 : (type))
typedef struct _GtkArg GtkArg;
typedef struct _GtkObject GtkObject; /* forward declaration of object type */
typedef struct _GtkTypeInfo GtkTypeInfo;
typedef struct _GtkTypeQuery GtkTypeQuery;
typedef struct _GtkEnumValue GtkEnumValue;
typedef struct _GtkEnumValue GtkFlagValue;
#define GTK_SIGNAL_FUNC(f) ((GtkSignalFunc) f)
typedef void (*GtkClassInitFunc) (gpointer klass);
typedef void (*GtkObjectInitFunc) (gpointer object,
gpointer klass);
typedef void (*GtkSignalFunc) ();
typedef gint (*GtkFunction) (gpointer data);
typedef void (*GtkDestroyNotify) (gpointer data);
typedef void (*GtkCallbackMarshal) (GtkObject *object,
gpointer data,
guint n_args,
GtkArg *args);
typedef void (*GtkSignalMarshaller) (GtkObject *object,
GtkSignalFunc func,
gpointer func_data,
GtkArg *args);
/* deprecated */
typedef void (*GtkArgGetFunc) (GtkObject*, GtkArg*, guint);
typedef void (*GtkArgSetFunc) (GtkObject*, GtkArg*, guint);
/* A GtkTypeObject defines the minimum structure requirements
* for type instances. Type instances returned from gtk_type_new ()
* and initialized through a GtkObjectInitFunc need to directly inherit
* from this structure or at least copy its fields one by one.
*/
struct _GtkTypeObject
{
/* A pointer to the objects class. This will actually point to
* the derived objects class struct (which will be derived from
* GtkTypeClass).
*/
GtkTypeClass *klass;
};
/* A GtkTypeClass defines the minimum structure requirements for
* a types class. Classes returned from gtk_type_class () and
* initialized through a GtkClassInitFunc need to directly inherit
* from this structure or at least copy its fields one by one.
*/
struct _GtkTypeClass
{
/* The type identifier for the objects class. There is
* one unique identifier per class.
*/
GtkType type;
};
struct _GtkArg
{
GtkType type;
gchar *name;
/* this union only defines the required storage types for
* the possibile values, thus there is no gint enum_data field,
* because that would just be a mere alias for gint int_data.
* use the GTK_VALUE_*() and GTK_RETLOC_*() macros to access
* the discrete memebers.
*/
union {
/* flat values */
gchar char_data;
guchar uchar_data;
gboolean bool_data;
gint int_data;
guint uint_data;
glong long_data;
gulong ulong_data;
gfloat float_data;
gdouble double_data;
gchar *string_data;
gpointer pointer_data;
GtkObject *object_data;
/* structured values */
struct {
GtkSignalFunc f;
gpointer d;
} signal_data;
struct {
gint n_args;
GtkArg *args;
} args_data;
struct {
GtkCallbackMarshal marshal;
gpointer data;
GtkDestroyNotify notify;
} callback_data;
struct {
GtkFunction func;
gpointer func_data;
} c_callback_data;
struct {
gpointer data;
GtkDestroyNotify notify;
} foreign_data;
} d;
};
/* argument value access macros, these must not contain casts,
* to allow the usage of these macros in combination with the
* adress operator, e.g. &GTK_VALUE_CHAR (*arg)
*/
/* flat values */
#define GTK_VALUE_CHAR(a) ((a).d.char_data)
#define GTK_VALUE_UCHAR(a) ((a).d.uchar_data)
#define GTK_VALUE_BOOL(a) ((a).d.bool_data)
#define GTK_VALUE_INT(a) ((a).d.int_data)
#define GTK_VALUE_UINT(a) ((a).d.uint_data)
#define GTK_VALUE_LONG(a) ((a).d.long_data)
#define GTK_VALUE_ULONG(a) ((a).d.ulong_data)
#define GTK_VALUE_FLOAT(a) ((a).d.float_data)
#define GTK_VALUE_DOUBLE(a) ((a).d.double_data)
#define GTK_VALUE_STRING(a) ((a).d.string_data)
#define GTK_VALUE_ENUM(a) ((a).d.int_data)
#define GTK_VALUE_FLAGS(a) ((a).d.uint_data)
#define GTK_VALUE_BOXED(a) ((a).d.pointer_data)
#define GTK_VALUE_POINTER(a) ((a).d.pointer_data)
#define GTK_VALUE_OBJECT(a) ((a).d.object_data)
/* structured values */
#define GTK_VALUE_SIGNAL(a) ((a).d.signal_data)
#define GTK_VALUE_ARGS(a) ((a).d.args_data)
#define GTK_VALUE_CALLBACK(a) ((a).d.callback_data)
#define GTK_VALUE_C_CALLBACK(a) ((a).d.c_callback_data)
#define GTK_VALUE_FOREIGN(a) ((a).d.foreign_data)
/* return location macros, these all narow down to
* pointer types, because return values need to be
* passed by reference
*/
/* flat values */
#define GTK_RETLOC_CHAR(a) ((gchar*) (a).d.pointer_data)
#define GTK_RETLOC_UCHAR(a) ((guchar*) (a).d.pointer_data)
#define GTK_RETLOC_BOOL(a) ((gboolean*) (a).d.pointer_data)
#define GTK_RETLOC_INT(a) ((gint*) (a).d.pointer_data)
#define GTK_RETLOC_UINT(a) ((guint*) (a).d.pointer_data)
#define GTK_RETLOC_LONG(a) ((glong*) (a).d.pointer_data)
#define GTK_RETLOC_ULONG(a) ((gulong*) (a).d.pointer_data)
#define GTK_RETLOC_FLOAT(a) ((gfloat*) (a).d.pointer_data)
#define GTK_RETLOC_DOUBLE(a) ((gdouble*) (a).d.pointer_data)
#define GTK_RETLOC_STRING(a) ((gchar**) (a).d.pointer_data)
#define GTK_RETLOC_ENUM(a) ((gint*) (a).d.pointer_data)
#define GTK_RETLOC_FLAGS(a) ((guint*) (a).d.pointer_data)
#define GTK_RETLOC_BOXED(a) ((gpointer*) (a).d.pointer_data)
#define GTK_RETLOC_POINTER(a) ((gpointer*) (a).d.pointer_data)
#define GTK_RETLOC_OBJECT(a) ((GtkObject**) (a).d.pointer_data)
struct _GtkTypeInfo
{
gchar *type_name;
guint object_size;
guint class_size;
GtkClassInitFunc class_init_func;
GtkObjectInitFunc object_init_func;
gpointer reserved_1;
gpointer reserved_2;
GtkClassInitFunc base_class_init_func;
};
struct _GtkTypeQuery
{
GtkType type;
const gchar *type_name;
guint object_size;
guint class_size;
};
struct _GtkEnumValue
{
guint value;
gchar *value_name;
gchar *value_nick;
};
void gtk_type_init (void);
GtkType gtk_type_unique (GtkType parent_type,
const GtkTypeInfo *type_info);
void gtk_type_set_chunk_alloc (GtkType type,
guint n_chunks);
gchar* gtk_type_name (guint type);
GtkType gtk_type_from_name (const gchar *name);
GtkType gtk_type_parent (GtkType type);
gpointer gtk_type_class (GtkType type);
gpointer gtk_type_parent_class (GtkType type);
GList* gtk_type_children_types (GtkType type);
gpointer gtk_type_new (GtkType type);
void gtk_type_free (GtkType type,
gpointer mem);
void gtk_type_describe_heritage (GtkType type);
void gtk_type_describe_tree (GtkType type,
gboolean show_size);
gboolean gtk_type_is_a (GtkType type,
GtkType is_a_type);
GtkTypeObject* gtk_type_check_object_cast (GtkTypeObject *type_object,
GtkType cast_type);
GtkTypeClass* gtk_type_check_class_cast (GtkTypeClass *klass,
GtkType cast_type);
GtkType gtk_type_register_enum (const gchar *type_name,
GtkEnumValue *values);
GtkType gtk_type_register_flags (const gchar *type_name,
GtkFlagValue *values);
GtkEnumValue* gtk_type_enum_get_values (GtkType enum_type);
GtkFlagValue* gtk_type_flags_get_values (GtkType flags_type);
GtkEnumValue* gtk_type_enum_find_value (GtkType enum_type,
const gchar *value_name);
GtkFlagValue* gtk_type_flags_find_value (GtkType flag_type,
const gchar *value_name);
/* set the argument collector alias for foreign fundamentals */
void gtk_type_set_varargs_type (GtkType foreign_type,
GtkType varargs_type);
GtkType gtk_type_get_varargs_type (GtkType foreign_type);
/* Report internal information about a type. The caller has the
* responsibility to invoke a subsequent g_free (returned_data); but
* must not modify data pointed to by the members of GtkTypeQuery
*/
GtkTypeQuery* gtk_type_query (GtkType type);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GTK_TYPE_UTILS_H__ */
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