Import Upstream version 2.72.4
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279
gobject/genums.h
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279
gobject/genums.h
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/* GObject - GLib Type, Object, Parameter and Signal Library
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* Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __G_ENUMS_H__
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#define __G_ENUMS_H__
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#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
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#error "Only <glib-object.h> can be included directly."
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#endif
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#include <gobject/gtype.h>
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G_BEGIN_DECLS
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/* --- type macros --- */
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/**
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* G_TYPE_IS_ENUM:
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* @type: a #GType ID.
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*
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* Checks whether @type "is a" %G_TYPE_ENUM.
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*
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* Returns: %TRUE if @type "is a" %G_TYPE_ENUM.
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*/
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#define G_TYPE_IS_ENUM(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_ENUM)
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/**
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* G_ENUM_CLASS:
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* @class: a valid #GEnumClass
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*
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* Casts a derived #GEnumClass structure into a #GEnumClass structure.
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*/
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#define G_ENUM_CLASS(class) (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_ENUM, GEnumClass))
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/**
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* G_IS_ENUM_CLASS:
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* @class: a #GEnumClass
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*
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* Checks whether @class "is a" valid #GEnumClass structure of type %G_TYPE_ENUM
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* or derived.
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*/
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#define G_IS_ENUM_CLASS(class) (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_ENUM))
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/**
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* G_ENUM_CLASS_TYPE:
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* @class: a #GEnumClass
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*
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* Get the type identifier from a given #GEnumClass structure.
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*
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* Returns: the #GType
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*/
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#define G_ENUM_CLASS_TYPE(class) (G_TYPE_FROM_CLASS (class))
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/**
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* G_ENUM_CLASS_TYPE_NAME:
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* @class: a #GEnumClass
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*
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* Get the static type name from a given #GEnumClass structure.
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*
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* Returns: the type name.
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*/
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#define G_ENUM_CLASS_TYPE_NAME(class) (g_type_name (G_ENUM_CLASS_TYPE (class)))
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/**
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* G_TYPE_IS_FLAGS:
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* @type: a #GType ID.
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*
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* Checks whether @type "is a" %G_TYPE_FLAGS.
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*
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* Returns: %TRUE if @type "is a" %G_TYPE_FLAGS.
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*/
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#define G_TYPE_IS_FLAGS(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_FLAGS)
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/**
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* G_FLAGS_CLASS:
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* @class: a valid #GFlagsClass
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*
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* Casts a derived #GFlagsClass structure into a #GFlagsClass structure.
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*/
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#define G_FLAGS_CLASS(class) (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_FLAGS, GFlagsClass))
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/**
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* G_IS_FLAGS_CLASS:
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* @class: a #GFlagsClass
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*
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* Checks whether @class "is a" valid #GFlagsClass structure of type %G_TYPE_FLAGS
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* or derived.
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*/
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#define G_IS_FLAGS_CLASS(class) (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_FLAGS))
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/**
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* G_FLAGS_CLASS_TYPE:
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* @class: a #GFlagsClass
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*
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* Get the type identifier from a given #GFlagsClass structure.
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*
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* Returns: the #GType
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*/
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#define G_FLAGS_CLASS_TYPE(class) (G_TYPE_FROM_CLASS (class))
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/**
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* G_FLAGS_CLASS_TYPE_NAME:
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* @class: a #GFlagsClass
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*
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* Get the static type name from a given #GFlagsClass structure.
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*
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* Returns: the type name.
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*/
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#define G_FLAGS_CLASS_TYPE_NAME(class) (g_type_name (G_FLAGS_CLASS_TYPE (class)))
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/**
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* G_VALUE_HOLDS_ENUM:
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* @value: a valid #GValue structure
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*
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* Checks whether the given #GValue can hold values derived from type %G_TYPE_ENUM.
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*
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* Returns: %TRUE on success.
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*/
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#define G_VALUE_HOLDS_ENUM(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_ENUM))
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/**
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* G_VALUE_HOLDS_FLAGS:
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* @value: a valid #GValue structure
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*
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* Checks whether the given #GValue can hold values derived from type %G_TYPE_FLAGS.
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*
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* Returns: %TRUE on success.
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*/
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#define G_VALUE_HOLDS_FLAGS(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_FLAGS))
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/* --- enum/flag values & classes --- */
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typedef struct _GEnumClass GEnumClass;
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typedef struct _GFlagsClass GFlagsClass;
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typedef struct _GEnumValue GEnumValue;
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typedef struct _GFlagsValue GFlagsValue;
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/**
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* GEnumClass:
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* @g_type_class: the parent class
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* @minimum: the smallest possible value.
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* @maximum: the largest possible value.
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* @n_values: the number of possible values.
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* @values: an array of #GEnumValue structs describing the
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* individual values.
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*
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* The class of an enumeration type holds information about its
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* possible values.
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*/
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struct _GEnumClass
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{
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GTypeClass g_type_class;
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/*< public >*/
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gint minimum;
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gint maximum;
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guint n_values;
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GEnumValue *values;
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};
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/**
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* GFlagsClass:
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* @g_type_class: the parent class
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* @mask: a mask covering all possible values.
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* @n_values: the number of possible values.
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* @values: an array of #GFlagsValue structs describing the
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* individual values.
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*
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* The class of a flags type holds information about its
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* possible values.
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*/
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struct _GFlagsClass
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{
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GTypeClass g_type_class;
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/*< public >*/
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guint mask;
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guint n_values;
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GFlagsValue *values;
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};
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/**
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* GEnumValue:
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* @value: the enum value
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* @value_name: the name of the value
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* @value_nick: the nickname of the value
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*
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* A structure which contains a single enum value, its name, and its
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* nickname.
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*/
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struct _GEnumValue
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{
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gint value;
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const gchar *value_name;
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const gchar *value_nick;
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};
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/**
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* GFlagsValue:
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* @value: the flags value
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* @value_name: the name of the value
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* @value_nick: the nickname of the value
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*
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* A structure which contains a single flags value, its name, and its
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* nickname.
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*/
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struct _GFlagsValue
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{
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guint value;
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const gchar *value_name;
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const gchar *value_nick;
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};
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/* --- prototypes --- */
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GLIB_AVAILABLE_IN_ALL
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GEnumValue* g_enum_get_value (GEnumClass *enum_class,
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gint value);
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GLIB_AVAILABLE_IN_ALL
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GEnumValue* g_enum_get_value_by_name (GEnumClass *enum_class,
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const gchar *name);
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GLIB_AVAILABLE_IN_ALL
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GEnumValue* g_enum_get_value_by_nick (GEnumClass *enum_class,
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const gchar *nick);
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GLIB_AVAILABLE_IN_ALL
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GFlagsValue* g_flags_get_first_value (GFlagsClass *flags_class,
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guint value);
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GLIB_AVAILABLE_IN_ALL
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GFlagsValue* g_flags_get_value_by_name (GFlagsClass *flags_class,
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const gchar *name);
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GLIB_AVAILABLE_IN_ALL
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GFlagsValue* g_flags_get_value_by_nick (GFlagsClass *flags_class,
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const gchar *nick);
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GLIB_AVAILABLE_IN_2_54
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gchar *g_enum_to_string (GType g_enum_type,
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gint value);
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GLIB_AVAILABLE_IN_2_54
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gchar *g_flags_to_string (GType flags_type,
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guint value);
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GLIB_AVAILABLE_IN_ALL
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void g_value_set_enum (GValue *value,
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gint v_enum);
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GLIB_AVAILABLE_IN_ALL
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gint g_value_get_enum (const GValue *value);
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GLIB_AVAILABLE_IN_ALL
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void g_value_set_flags (GValue *value,
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guint v_flags);
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GLIB_AVAILABLE_IN_ALL
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guint g_value_get_flags (const GValue *value);
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/* --- registration functions --- */
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/* const_static_values is a NULL terminated array of enum/flags
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* values that is taken over!
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*/
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GLIB_AVAILABLE_IN_ALL
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GType g_enum_register_static (const gchar *name,
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const GEnumValue *const_static_values);
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GLIB_AVAILABLE_IN_ALL
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GType g_flags_register_static (const gchar *name,
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const GFlagsValue *const_static_values);
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/* functions to complete the type information
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* for enums/flags implemented by plugins
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*/
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GLIB_AVAILABLE_IN_ALL
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void g_enum_complete_type_info (GType g_enum_type,
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GTypeInfo *info,
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const GEnumValue *const_values);
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GLIB_AVAILABLE_IN_ALL
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void g_flags_complete_type_info (GType g_flags_type,
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GTypeInfo *info,
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const GFlagsValue *const_values);
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G_END_DECLS
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#endif /* __G_ENUMS_H__ */
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