/*

 * Copyright © 2001 Red Hat, Inc.

 *

 * Permission to use, copy, modify, distribute, and sell this software and its

 * documentation for any purpose is hereby granted without fee, provided that

 * the above copyright notice appear in all copies and that both that

 * copyright notice and this permission notice appear in supporting

 * documentation, and that the name of Red Hat not be used in advertising or

 * publicity pertaining to distribution of the software without specific,

 * written prior permission.  Red Hat makes no representations about the

 * suitability of this software for any purpose.  It is provided "as is"

 * without express or implied warranty.

 *

 * RED HAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL RED HAT

 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION

 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 

 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 *

 * Author:  Owen Taylor, Red Hat, Inc.

 */

#include <glib.h>

#include "string.h"

#include "stdlib.h"

#include <X11/Xlib.h>

#include <X11/Xmd.h>		/* For CARD32 */

#include "xsettings-common.h"

XSettingsSetting *

xsettings_setting_new (const gchar *name)

{

  XSettingsSetting *result;

  result = g_slice_new0 (XSettingsSetting);

  result->name = g_strdup (name);

  return result;

}

static gboolean

xsettings_variant_equal0 (GVariant *a,

                          GVariant *b)

{

  if (a == b)

    return TRUE;

  if (!a || !b)

    return FALSE;

  return g_variant_equal (a, b);

}

GVariant *

xsettings_setting_get (XSettingsSetting *setting)

{

  gint i;

  for (i = G_N_ELEMENTS (setting->value) - 1; 0 <= i; i--)

    if (setting->value[i])

      return setting->value[i];

  return NULL;

}

void

xsettings_setting_set (XSettingsSetting *setting,

                       gint              tier,

                       GVariant         *value,

                       guint32           serial)

{

  GVariant *old_value;

  old_value = xsettings_setting_get (setting);

  if (old_value)

    g_variant_ref (old_value);

  if (setting->value[tier])

    g_variant_unref (setting->value[tier]);

  setting->value[tier] = value ? g_variant_ref_sink (value) : NULL;

  if (!xsettings_variant_equal0 (old_value, xsettings_setting_get (setting)))

    setting->last_change_serial = serial;

  if (old_value)

    g_variant_unref (old_value);

}

void

xsettings_setting_free (XSettingsSetting *setting)

{

  gint i;

  for (i = 0; i < G_N_ELEMENTS (setting->value); i++)

    if (setting->value[i])

      g_variant_unref (setting->value[i]);

  g_free (setting->name);

  g_slice_free (XSettingsSetting, setting);

}

char

xsettings_byte_order (void)

{

  CARD32 myint = 0x01020304;

  return (*(char *)&myint == 1) ? MSBFirst : LSBFirst;

}