/* GObject - GLib Type, Object, Parameter and Signal Library

 * Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.

 * Portions copyright (c) 2006-2009 Nokia Corporation.  All rights reserved.

 *

 * 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 "config.h"

#include <string.h>

#include "genums.h"

#include "gvalue.h"

#include "gvaluecollector.h"

#include "gobjectalias.h"

#ifdef __SYMBIAN32__

#include "gobject_wsd.h"

#endif /* __SYMBIAN32__ */

/**

 * SECTION:enumerations_flags

 * @short_description: Enumeration and flags types

 * @see_also:#GParamSpecEnum, #GParamSpecFlags, g_param_spec_enum(),

 * g_param_spec_flags(),

 *

 * <link linkend="glib-mkenums">glib-mkenums</link>

 * @title: Enumeration and Flag Types

 *

 * The GLib type system provides fundamental types for enumeration and

 * flags types. (Flags types are like enumerations, but allow their

 * values to be combined by bitwise or). A registered enumeration or

 * flags type associates a name and a nickname with each allowed

 * value, and the methods g_enum_get_value_by_name(),

 * g_enum_get_value_by_nick(), g_flags_get_value_by_name() and

 * g_flags_get_value_by_nick() can look up values by their name or

 * nickname.  When an enumeration or flags type is registered with the

 * GLib type system, it can be used as value type for object

 * properties, using g_param_spec_enum() or g_param_spec_flags().

 *

 * GObject ships with a utility called <link

 * linkend="glib-mkenums">glib-mkenums</link> that can construct

 * suitable type registration functions from C enumeration

 * definitions.

 */

/* --- 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 --- */

#if EMULATOR

PLS(initialized ,g_enum_types_init,gboolean)

PLS(info,g_enum_types_init,GTypeInfo)

#define initialized  (*FUNCTION_NAME(initialized ,g_enum_types_init)())

#define info  (*FUNCTION_NAME(info ,g_enum_types_init)())

const GTypeValueTable temp_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 */

  };

const GTypeInfo temp_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 */

    &temp_flags_enum_value_table,    /* value_table */

  };

#endif /* EMULATOR */

void

g_enum_types_init (void)

{

#if !(EMULATOR)

  static gboolean initialized = FALSE;

#endif /*EMULATOR */  

  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 */

  };

#if !(EMULATOR)

  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 */

  };

#endif /*EMULATOR */

  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, g_intern_static_string ("GEnum"), &info, &finfo,

				      G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT);

  g_assert (type == G_TYPE_ENUM);

  /* G_TYPE_FLAGS

   */

  info.class_size = sizeof (GFlagsClass);

  type = g_type_register_fundamental (G_TYPE_FLAGS, g_intern_static_string ("GFlags"), &info, &finfo,

				      G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT);

  g_assert (type == G_TYPE_FLAGS);

}

#if EMULATOR

#undef initialized 

#undef info

#endif /* EMULATOR */

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;

}

/**

 * g_enum_register_static:

 * @name: A nul-terminated string used as the name of the new type.

 * @const_static_values: An array of #GEnumValue structs for the possible

 *  enumeration values. The array is terminated by a struct with all

 *  members being 0. GObject keeps a reference to the data, so it cannot

 *  be stack-allocated.

 *

 * Registers a new static enumeration type with the name @name.

 *

 * It is normally more convenient to let <link

 * linkend="glib-mkenums">glib-mkenums</link> generate a

 * my_enum_get_type() function from a usual C enumeration definition

 * than to write one yourself using g_enum_register_static().

 *

 * Returns: The new type identifier.

 */

EXPORT_C 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;

}

/**

 * g_flags_register_static:

 * @name: A nul-terminated string used as the name of the new type.

 * @const_static_values: An array of #GFlagsValue structs for the possible

 *  flags values. The array is terminated by a struct with all members being 0.

 *  GObject keeps a reference to the data, so it cannot be stack-allocated.

 *

 * Registers a new static flags type with the name @name.

 *

 * It is normally more convenient to let <link

 * linkend="glib-mkenums">glib-mkenums</link> generate a

 * my_flags_get_type() function from a usual C enumeration definition

 * than to write one yourself using g_flags_register_static().

 *

 * Returns: The new type identifier.

 */

EXPORT_C 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;

}

/**

 * g_enum_complete_type_info:

 * @g_enum_type: the type identifier of the type being completed

 * @info: the #GTypeInfo struct to be filled in

 * @const_values: An array of #GEnumValue structs for the possible

 *  enumeration values. The array is terminated by a struct with all

 *  members being 0.

 *

 * This function is meant to be called from the complete_type_info()

 * function of a #GTypePlugin implementation, as in the following

 * example:

 *

 * |[

 * static void

 * my_enum_complete_type_info (GTypePlugin     *plugin,

 *                             GType            g_type,

 *                             GTypeInfo       *info,

 *                             GTypeValueTable *value_table)

 * {

 *   static const GEnumValue values[] = {

 *     { MY_ENUM_FOO, "MY_ENUM_FOO", "foo" },

 *     { MY_ENUM_BAR, "MY_ENUM_BAR", "bar" },

 *     { 0, NULL, NULL }

 *   };

 *

 *   g_enum_complete_type_info (type, info, values);

 * }

 * ]|

 */

EXPORT_C 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;

}

/**

 * g_flags_complete_type_info:

 * @g_flags_type: the type identifier of the type being completed

 * @info: the #GTypeInfo struct to be filled in

 * @const_values: An array of #GFlagsValue structs for the possible

 *  enumeration values. The array is terminated by a struct with all

 *  members being 0.

 *

 * This function is meant to be called from the complete_type_info()

 * function of a #GTypePlugin implementation, see the example for

 * g_enum_complete_type_info() above.

 */

EXPORT_C 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++;

	}

    }

}

/**

 * g_enum_get_value_by_name:

 * @enum_class: a #GEnumClass

 * @name: the name to look up

 *

 * Looks up a #GEnumValue by name.

 *

 * Returns: the #GEnumValue with name @name, or %NULL if the

 *          enumeration doesn't have a member with that name

 */

EXPORT_C 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;

}

/**

 * g_flags_get_value_by_name:

 * @flags_class: a #GFlagsClass

 * @name: the name to look up

 *

 * Looks up a #GFlagsValue by name.

 *

 * Returns: the #GFlagsValue with name @name, or %NULL if there is no

 *          flag with that name

 */

EXPORT_C 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;

}

/**

 * g_enum_get_value_by_nick:

 * @enum_class: a #GEnumClass

 * @nick: the nickname to look up

 *

 * Looks up a #GEnumValue by nickname.

 *

 * Returns: the #GEnumValue with nickname @nick, or %NULL if the

 *          enumeration doesn't have a member with that nickname

 */

EXPORT_C 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;

}

/**

 * g_flags_get_value_by_nick:

 * @flags_class: a #GFlagsClass

 * @nick: the nickname to look up

 *

 * Looks up a #GFlagsValue by nickname.

 *

 * Returns: the #GFlagsValue with nickname @nick, or %NULL if there is

 *          no flag with that nickname

 */

EXPORT_C GFlagsValue*

g_flags_get_value_by_nick (GFlagsClass *flags_class,