/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <stdlib.h>
#include <string.h>
#include <locale.h>

#include <glib-object.h>

#include "core-types.h"

#include "gimp-utils.h"


gboolean
gimp_rectangle_intersect (gint  x1,
                          gint  y1,
                          gint  width1,
                          gint  height1,
                          gint  x2,
                          gint  y2,
                          gint  width2,
                          gint  height2,
                          gint *dest_x,
                          gint *dest_y,
                          gint *dest_width,
                          gint *dest_height)
{
  gint d_x, d_y;
  gint d_w, d_h;

  d_x = MAX (x1, x2);
  d_y = MAX (y1, y2);
  d_w = MIN (x1 + width1,  x2 + width2)  - d_x;
  d_h = MIN (y1 + height1, y2 + height2) - d_y;

  if (dest_x)      *dest_x      = d_x;
  if (dest_y)      *dest_y      = d_y;
  if (dest_width)  *dest_width  = d_w;
  if (dest_height) *dest_height = d_h;

  return (d_w > 0 && d_h > 0);
}

gint64
gimp_g_object_get_memsize (GObject *object)
{
  GTypeQuery type_query;
  gint64     memsize = 0;

  g_return_val_if_fail (G_IS_OBJECT (object), 0);

  g_type_query (G_TYPE_FROM_INSTANCE (object), &type_query);

  memsize += type_query.instance_size;

  return memsize;
}

gint64
gimp_g_hash_table_get_memsize (GHashTable *hash)
{
  g_return_val_if_fail (hash != NULL, 0);

  return (2 * sizeof (gint) +
          5 * sizeof (gpointer) +
          g_hash_table_size (hash) * 3 * sizeof (gpointer));
}

gint64
gimp_g_slist_get_memsize (GSList  *slist,
                          gint64   data_size)
{
  return g_slist_length (slist) * (data_size + sizeof (GSList));
}

gint64
gimp_g_list_get_memsize (GList  *list,
                         gint64  data_size)
{
  return g_list_length (list) * (data_size + sizeof (GList));
}


/*
 *  basically copied from gtk_get_default_language()
 */
gchar *
gimp_get_default_language (void)
{
  gchar *lang;
  gchar *p;

#ifdef G_OS_WIN32
  p = getenv ("LC_ALL");
  if (p != NULL)
    lang = g_strdup (p);
  else
    {
      p = getenv ("LANG");
      if (p != NULL)
	lang = g_strdup (p);
      else
	{
	  p = getenv ("LC_CTYPE");
	  if (p != NULL)
	    lang = g_strdup (p);
	  else
	    lang = g_win32_getlocale ();
	}
    }
#else
  lang = g_strdup (setlocale (LC_CTYPE, NULL));
#endif
  p = strchr (lang, '.');
  if (p)
    *p = '\0';
  p = strchr (lang, '@');
  if (p)
    *p = '\0';

  return lang;
}