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glib/gobject/genums.c
Tim Janik bbc5a3adac changed collect_format, collect_value() and lcopy_format, lcopy_value() in 
Sat Feb 17 04:55:35 2001  Tim Janik  <timj@gtk.org>

        * gtype.[hc]: changed collect_format, collect_value() and lcopy_format,
        lcopy_value() in the GTypeValueTable. the collect functions are now
        called only once per value, collect_format/lcopy_format are strings
        that enlist all necessary GTypeCValues to be varargs-collected.

        * gvalue.h: ranamed STATIC_TAG to G_VALUE_NOCOPY_CONTENTS to indicate that
        a value shouldn't copy its contents.

        * gvaluecollector.h: changed G_VALUE_COLLECT() and G_VALUE_LCOPY()
        macros to carry an additional argument (flags) that can be used
        to pass G_VALUE_NOCOPY_CONTENTS along to the collection functions.

        * *.c: adapted collect_value() and lcopy_value() functions to the new
        prototypes, support G_VALUE_NOCOPY_CONTENTS where apropriate.

        * gsignal.[hc]: introduced a G_SIGNAL_TYPE_STATIC_SCOPE flag that can
        be passed along (ORed) with the parameter types, indicating that the
        emission arguments are to be considered static for the scope of the
        emission. should be used with care and only if the caller knows that
        a parameter cannot be destroyed/freed from signal handlers connected
        to an emission.
2001-02-17 05:32:00 +00:00

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/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 1998, 1999, 2000 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.
*/
/*
* MT safe
*/
#include <string.h>
#include "genums.h"
#include "gvalue.h"
#include "gvaluecollector.h"
/* --- prototypes --- */
static void g_enum_class_init (GEnumClass *class,
gpointer class_data);
static void g_flags_class_init (GFlagsClass *class,
gpointer class_data);
static void value_flags_enum_init (GValue *value);
static void value_flags_enum_copy_value (const GValue *src_value,
GValue *dest_value);
static gchar* value_flags_enum_collect_value (GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
static gchar* value_flags_enum_lcopy_value (const GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
/* --- functions --- */
void
g_enum_types_init (void) /* sync with gtype.c */
{
static gboolean initialized = FALSE;
static const GTypeValueTable flags_enum_value_table = {
value_flags_enum_init, /* value_init */
NULL, /* value_free */
value_flags_enum_copy_value, /* value_copy */
NULL, /* value_peek_pointer */
"i", /* collect_format */
value_flags_enum_collect_value, /* collect_value */
"p", /* lcopy_format */
value_flags_enum_lcopy_value, /* lcopy_value */
};
static GTypeInfo info = {
0, /* class_size */
NULL, /* base_init */
NULL, /* base_destroy */
NULL, /* class_init */
NULL, /* class_destroy */
NULL, /* class_data */
0, /* instance_size */
0, /* n_preallocs */
NULL, /* instance_init */
&flags_enum_value_table, /* value_table */
};
static const GTypeFundamentalInfo finfo = {
G_TYPE_FLAG_CLASSED | G_TYPE_FLAG_DERIVABLE,
};
GType type;
g_return_if_fail (initialized == FALSE);
initialized = TRUE;
/* G_TYPE_ENUM
*/
info.class_size = sizeof (GEnumClass);
type = g_type_register_fundamental (G_TYPE_ENUM, "GEnum", &info, &finfo, G_TYPE_FLAG_ABSTRACT);
g_assert (type == G_TYPE_ENUM);
/* G_TYPE_FLAGS
*/
info.class_size = sizeof (GFlagsClass);
type = g_type_register_fundamental (G_TYPE_FLAGS, "GFlags", &info, &finfo, G_TYPE_FLAG_ABSTRACT);
g_assert (type == G_TYPE_FLAGS);
}
static void
value_flags_enum_init (GValue *value)
{
value->data[0].v_long = 0;
}
static void
value_flags_enum_copy_value (const GValue *src_value,
GValue *dest_value)
{
dest_value->data[0].v_long = src_value->data[0].v_long;
}
static gchar*
value_flags_enum_collect_value (GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags)
{
value->data[0].v_long = collect_values[0].v_int;
return NULL;
}
static gchar*
value_flags_enum_lcopy_value (const GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags)
{
gint *int_p = collect_values[0].v_pointer;
if (!int_p)
return g_strdup_printf ("value location for `%s' passed as NULL", G_VALUE_TYPE_NAME (value));
*int_p = value->data[0].v_long;
return NULL;
}
GType
g_enum_register_static (const gchar *name,
const GEnumValue *const_static_values)
{
GTypeInfo enum_type_info = {
sizeof (GEnumClass), /* class_size */
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) g_enum_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
0, /* instance_size */
0, /* n_preallocs */
NULL, /* instance_init */
NULL, /* value_table */
};
GType type;
g_return_val_if_fail (name != NULL, 0);
g_return_val_if_fail (const_static_values != NULL, 0);
enum_type_info.class_data = const_static_values;
type = g_type_register_static (G_TYPE_ENUM, name, &enum_type_info, 0);
return type;
}
GType
g_flags_register_static (const gchar *name,
const GFlagsValue *const_static_values)
{
GTypeInfo flags_type_info = {
sizeof (GFlagsClass), /* class_size */
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) g_flags_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
0, /* instance_size */
0, /* n_preallocs */
NULL, /* instance_init */
NULL, /* value_table */
};
GType type;
g_return_val_if_fail (name != NULL, 0);
g_return_val_if_fail (const_static_values != NULL, 0);
flags_type_info.class_data = const_static_values;
type = g_type_register_static (G_TYPE_FLAGS, name, &flags_type_info, 0);
return type;
}
void
g_enum_complete_type_info (GType g_enum_type,
GTypeInfo *info,
const GEnumValue *const_values)
{
g_return_if_fail (G_TYPE_IS_ENUM (g_enum_type));
g_return_if_fail (info != NULL);
g_return_if_fail (const_values != NULL);
info->class_size = sizeof (GEnumClass);
info->base_init = NULL;
info->base_finalize = NULL;
info->class_init = (GClassInitFunc) g_enum_class_init;
info->class_finalize = NULL;
info->class_data = const_values;
}
void
g_flags_complete_type_info (GType g_flags_type,
GTypeInfo *info,
const GFlagsValue *const_values)
{
g_return_if_fail (G_TYPE_IS_FLAGS (g_flags_type));
g_return_if_fail (info != NULL);
g_return_if_fail (const_values != NULL);
info->class_size = sizeof (GFlagsClass);
info->base_init = NULL;
info->base_finalize = NULL;
info->class_init = (GClassInitFunc) g_flags_class_init;
info->class_finalize = NULL;
info->class_data = const_values;
}
static void
g_enum_class_init (GEnumClass *class,
gpointer class_data)
{
g_return_if_fail (G_IS_ENUM_CLASS (class));
class->minimum = 0;
class->maximum = 0;
class->n_values = 0;
class->values = class_data;
if (class->values)
{
GEnumValue *values;
class->minimum = class->values->value;
class->maximum = class->values->value;
for (values = class->values; values->value_name; values++)
{
class->minimum = MIN (class->minimum, values->value);
class->maximum = MAX (class->maximum, values->value);
class->n_values++;
}
}
}
static void
g_flags_class_init (GFlagsClass *class,
gpointer class_data)
{
g_return_if_fail (G_IS_FLAGS_CLASS (class));
class->mask = 0;
class->n_values = 0;
class->values = class_data;
if (class->values)
{
GFlagsValue *values;
for (values = class->values; values->value_name; values++)
{
class->mask |= values->value;
class->n_values++;
}
}
}
GEnumValue*
g_enum_get_value_by_name (GEnumClass *enum_class,
const gchar *name)
{
g_return_val_if_fail (G_IS_ENUM_CLASS (enum_class), NULL);
g_return_val_if_fail (name != NULL, NULL);
if (enum_class->n_values)
{
GEnumValue *enum_value;
for (enum_value = enum_class->values; enum_value->value_name; enum_value++)
if (strcmp (name, enum_value->value_name) == 0)
return enum_value;
}
return NULL;
}
GFlagsValue*
g_flags_get_value_by_name (GFlagsClass *flags_class,
const gchar *name)
{
g_return_val_if_fail (G_IS_FLAGS_CLASS (flags_class), NULL);
g_return_val_if_fail (name != NULL, NULL);
if (flags_class->n_values)
{
GFlagsValue *flags_value;
for (flags_value = flags_class->values; flags_value->value_name; flags_value++)
if (strcmp (name, flags_value->value_name) == 0)
return flags_value;
}
return NULL;
}
GEnumValue*
g_enum_get_value_by_nick (GEnumClass *enum_class,
const gchar *nick)
{
g_return_val_if_fail (G_IS_ENUM_CLASS (enum_class), NULL);
g_return_val_if_fail (nick != NULL, NULL);
if (enum_class->n_values)
{
GEnumValue *enum_value;
for (enum_value = enum_class->values; enum_value->value_name; enum_value++)
if (enum_value->value_nick && strcmp (nick, enum_value->value_nick) == 0)
return enum_value;
}
return NULL;
}
GFlagsValue*
g_flags_get_value_by_nick (GFlagsClass *flags_class,
const gchar *nick)
{
g_return_val_if_fail (G_IS_FLAGS_CLASS (flags_class), NULL);
g_return_val_if_fail (nick != NULL, NULL);
if (flags_class->n_values)
{
GFlagsValue *flags_value;
for (flags_value = flags_class->values; flags_value->value_nick; flags_value++)
if (flags_value->value_nick && strcmp (nick, flags_value->value_nick) == 0)
return flags_value;
}
return NULL;
}
GEnumValue*
g_enum_get_value (GEnumClass *enum_class,
gint value)
{
g_return_val_if_fail (G_IS_ENUM_CLASS (enum_class), NULL);
if (enum_class->n_values)
{
GEnumValue *enum_value;
for (enum_value = enum_class->values; enum_value->value_name; enum_value++)
if (enum_value->value == value)
return enum_value;
}
return NULL;
}
GFlagsValue*
g_flags_get_first_value (GFlagsClass *flags_class,
guint value)
{
g_return_val_if_fail (G_IS_FLAGS_CLASS (flags_class), NULL);
if (flags_class->n_values)
{
GFlagsValue *flags_value;
for (flags_value = flags_class->values; flags_value->value_name; flags_value++)
if ((flags_value->value & value) > 0)
return flags_value;
}
return NULL;
}
void
g_value_set_enum (GValue *value,
gint v_enum)
{
g_return_if_fail (G_IS_VALUE_ENUM (value));
value->data[0].v_long = v_enum;
}
gint
g_value_get_enum (const GValue *value)
{
g_return_val_if_fail (G_IS_VALUE_ENUM (value), 0);
return value->data[0].v_long;
}
void
g_value_set_flags (GValue *value,
guint v_flags)
{
g_return_if_fail (G_IS_VALUE_FLAGS (value));
value->data[0].v_ulong = v_flags;
}
guint
g_value_get_flags (const GValue *value)
{
g_return_val_if_fail (G_IS_VALUE_FLAGS (value), 0);
return value->data[0].v_ulong;
}
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