/usr/include/glib-2.0/gobject/gvalue.h is in libglib2.0-dev 2.42.1-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 | /* 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, see <http://www.gnu.org/licenses/>.
*
* gvalue.h: generic GValue functions
*/
#ifndef __G_VALUE_H__
#define __G_VALUE_H__
#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
#error "Only <glib-object.h> can be included directly."
#endif
#include <gobject/gtype.h>
G_BEGIN_DECLS
/* --- type macros --- */
/**
* G_TYPE_IS_VALUE:
* @type: A #GType value.
*
* Checks whether the passed in type ID can be used for g_value_init().
* That is, this macro checks whether this type provides an implementation
* of the #GTypeValueTable functions required for a type to create a #GValue of.
*
* Returns: Whether @type is suitable as a #GValue type.
*/
#define G_TYPE_IS_VALUE(type) (g_type_check_is_value_type (type))
/**
* G_IS_VALUE:
* @value: A #GValue structure.
*
* Checks if @value is a valid and initialized #GValue structure.
*
* Returns: %TRUE on success.
*/
#define G_IS_VALUE(value) (G_TYPE_CHECK_VALUE (value))
/**
* G_VALUE_TYPE:
* @value: A #GValue structure.
*
* Get the type identifier of @value.
*
* Returns: the #GType.
*/
#define G_VALUE_TYPE(value) (((GValue*) (value))->g_type)
/**
* G_VALUE_TYPE_NAME:
* @value: A #GValue structure.
*
* Gets the type name of @value.
*
* Returns: the type name.
*/
#define G_VALUE_TYPE_NAME(value) (g_type_name (G_VALUE_TYPE (value)))
/**
* G_VALUE_HOLDS:
* @value: A #GValue structure.
* @type: A #GType value.
*
* Checks if @value holds (or contains) a value of @type.
* This macro will also check for @value != %NULL and issue a
* warning if the check fails.
*
* Returns: %TRUE if @value holds the @type.
*/
#define G_VALUE_HOLDS(value,type) (G_TYPE_CHECK_VALUE_TYPE ((value), (type)))
/* --- typedefs & structures --- */
/**
* GValueTransform:
* @src_value: Source value.
* @dest_value: Target value.
*
* The type of value transformation functions which can be registered with
* g_value_register_transform_func().
*/
typedef void (*GValueTransform) (const GValue *src_value,
GValue *dest_value);
/**
* GValue:
*
* An opaque structure used to hold different types of values.
* The data within the structure has protected scope: it is accessible only
* to functions within a #GTypeValueTable structure, or implementations of
* the g_value_*() API. That is, code portions which implement new fundamental
* types.
* #GValue users cannot make any assumptions about how data is stored
* within the 2 element @data union, and the @g_type member should
* only be accessed through the G_VALUE_TYPE() macro.
*/
struct _GValue
{
/*< private >*/
GType g_type;
/* public for GTypeValueTable methods */
union {
gint v_int;
guint v_uint;
glong v_long;
gulong v_ulong;
gint64 v_int64;
guint64 v_uint64;
gfloat v_float;
gdouble v_double;
gpointer v_pointer;
} data[2];
};
/* --- prototypes --- */
GLIB_AVAILABLE_IN_ALL
GValue* g_value_init (GValue *value,
GType g_type);
GLIB_AVAILABLE_IN_ALL
void g_value_copy (const GValue *src_value,
GValue *dest_value);
GLIB_AVAILABLE_IN_ALL
GValue* g_value_reset (GValue *value);
GLIB_AVAILABLE_IN_ALL
void g_value_unset (GValue *value);
GLIB_AVAILABLE_IN_ALL
void g_value_set_instance (GValue *value,
gpointer instance);
GLIB_AVAILABLE_IN_2_42
void g_value_init_from_instance (GValue *value,
gpointer instance);
/* --- private --- */
GLIB_AVAILABLE_IN_ALL
gboolean g_value_fits_pointer (const GValue *value);
GLIB_AVAILABLE_IN_ALL
gpointer g_value_peek_pointer (const GValue *value);
/* --- implementation details --- */
GLIB_AVAILABLE_IN_ALL
gboolean g_value_type_compatible (GType src_type,
GType dest_type);
GLIB_AVAILABLE_IN_ALL
gboolean g_value_type_transformable (GType src_type,
GType dest_type);
GLIB_AVAILABLE_IN_ALL
gboolean g_value_transform (const GValue *src_value,
GValue *dest_value);
GLIB_AVAILABLE_IN_ALL
void g_value_register_transform_func (GType src_type,
GType dest_type,
GValueTransform transform_func);
/**
* G_VALUE_NOCOPY_CONTENTS:
*
* If passed to G_VALUE_COLLECT(), allocated data won't be copied
* but used verbatim. This does not affect ref-counted types like
* objects.
*/
#define G_VALUE_NOCOPY_CONTENTS (1 << 27)
/**
* G_VALUE_INIT:
*
* A #GValue must be initialized before it can be used. This macro can
* be used as initializer instead of an explicit `{ 0 }` when declaring
* a variable, but it cannot be assigned to a variable.
*
* |[
* GValue value = G_VALUE_INIT;
* ]|
*
* Since: 2.30
*/
#define G_VALUE_INIT { 0, { { 0 } } }
G_END_DECLS
#endif /* __G_VALUE_H__ */
|