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

 * Copyright (C) 2000-2001 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.

 */

#include "config.h"

#include <string.h>

#include "gboxed.h"

#include "gbsearcharray.h"

#include "gvalue.h"

#include "gvaluearray.h"

#include "gclosure.h"

#include "gvaluecollector.h"

#include "gobjectalias.h"

#ifdef __SYMBIAN32__

#include "gobject_wsd.h"

#endif /* __SYMBIAN32__ */

/**

 * SECTION:gboxed

 * @short_description: A mechanism to wrap opaque C structures registered

 *     by the type system

 * @see_also: #GParamSpecBoxed, g_param_spec_boxed()

 * @title: Boxed Types

 *

 * GBoxed is a generic wrapper mechanism for arbitrary C structures. The only

 * thing the type system needs to know about the structures is how to copy and

 * free them, beyond that they are treated as opaque chunks of memory.

 *

 * Boxed types are useful for simple value-holder structures like rectangles or

 * points. They can also be used for wrapping structures defined in non-GObject

 * based libraries.

 */

/* --- typedefs & structures --- */

typedef struct

{

  GType		 type;

  GBoxedCopyFunc copy;

  GBoxedFreeFunc free;

} BoxedNode;

/* --- prototypes --- */

static gint	boxed_nodes_cmp		(gconstpointer	p1,

					 gconstpointer	p2);

/* --- variables --- */

#if EMULATOR	

PLS(boxed_bsa,gboxed,GBSearchArray *)

#define boxed_bsa (*FUNCTION_NAME(boxed_bsa,gboxed)())

#else

static GBSearchArray *boxed_bsa = NULL;

#endif /*EMULATOR */

static const GBSearchConfig boxed_bconfig = {

  sizeof (BoxedNode),

  boxed_nodes_cmp,

  0,

};

/* --- functions --- */

static gint

boxed_nodes_cmp	(gconstpointer p1,

		 gconstpointer p2)

{

  const BoxedNode *node1 = p1, *node2 = p2;

  return G_BSEARCH_ARRAY_CMP (node1->type, node2->type);

}

static inline void              /* keep this function in sync with gvalue.c */

value_meminit (GValue *value,

	       GType   value_type)

{

  value->g_type = value_type;

  memset (value->data, 0, sizeof (value->data));

}

static gpointer

value_copy (gpointer boxed)

{

  const GValue *src_value = boxed;

  GValue *dest_value = g_new0 (GValue, 1);

  if (G_VALUE_TYPE (src_value))

    {

      g_value_init (dest_value, G_VALUE_TYPE (src_value));

      g_value_copy (src_value, dest_value);

    }

  return dest_value;

}

static void

value_free (gpointer boxed)

{

  GValue *value = boxed;

  if (G_VALUE_TYPE (value))

    g_value_unset (value);

  g_free (value);

}

void

g_boxed_type_init (void)

{

  static const 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 */

    NULL,                       /* value_table */

  };

  const GTypeFundamentalInfo finfo = { G_TYPE_FLAG_DERIVABLE, };

  GType type;

  boxed_bsa = g_bsearch_array_create (&boxed_bconfig);

  /* G_TYPE_BOXED

   */

  type = g_type_register_fundamental (G_TYPE_BOXED, g_intern_static_string ("GBoxed"), &info, &finfo,

				      G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT);

  g_assert (type == G_TYPE_BOXED);

}

#if EMULATOR

PLS(type_id,g_closure_get_type ,GType)

#define type_id (*FUNCTION_NAME(type_id,g_closure_get_type )())

#endif /* EMULATOR */

EXPORT_C GType

g_closure_get_type (void)

{

  #if !(EMULATOR)

  static GType type_id = 0;

  #endif /* EMULATOR */

  if (!type_id)

    type_id = g_boxed_type_register_static (g_intern_static_string ("GClosure"),

					    (GBoxedCopyFunc) g_closure_ref,

					    (GBoxedFreeFunc) g_closure_unref);

  return type_id;

}

#if EMULATOR

#undef type_id

PLS(type_id,g_value_get_type ,GType)

#define type_id (*FUNCTION_NAME(type_id,g_value_get_type )())

#endif /* EMULATOR */

EXPORT_C GType

g_value_get_type (void)

{

  #if !(EMULATOR)

  static GType type_id = 0;

  #endif /* EMULATOR */

  if (!type_id)

    type_id = g_boxed_type_register_static (g_intern_static_string ("GValue"),

					    value_copy,

					    value_free);

  return type_id;

}

#if EMULATOR

#undef type_id

PLS(type_id,g_value_array_get_type ,GType)

#define type_id (*FUNCTION_NAME(type_id,g_value_array_get_type )())

#endif /* EMULATOR */

EXPORT_C GType

g_value_array_get_type (void)

{

  #if !(EMULATOR)

  static GType type_id = 0;

  #endif /* EMULATOR */

  if (!type_id)

    type_id = g_boxed_type_register_static (g_intern_static_string ("GValueArray"),

					    (GBoxedCopyFunc) g_value_array_copy,

					    (GBoxedFreeFunc) g_value_array_free);

  return type_id;

}

static gpointer

gdate_copy (gpointer boxed)

{

  const GDate *date = (const GDate*) boxed;

  return g_date_new_julian (g_date_get_julian (date));

}

#if EMULATOR

#undef type_id

PLS(type_id,g_date_get_type ,GType)

#define type_id (*FUNCTION_NAME(type_id,g_date_get_type )())

#endif /* EMULATOR */

EXPORT_C GType

g_date_get_type (void)

{

  #if !(EMULATOR)

  static GType type_id = 0;

  #endif /* EMULATOR */

  if (!type_id)

    type_id = g_boxed_type_register_static (g_intern_static_string ("GDate"),

					    (GBoxedCopyFunc) gdate_copy,

					    (GBoxedFreeFunc) g_date_free);

  return type_id;

}

#if EMULATOR

#undef type_id

PLS(type_id,g_strv_get_type ,GType)

#define type_id (*FUNCTION_NAME(type_id,g_strv_get_type )())

#endif /* EMULATOR */

EXPORT_C GType

g_strv_get_type (void)

{

  #if !(EMULATOR)

  static GType type_id = 0;

  #endif /* EMULATOR */

  if (!type_id)

    type_id = g_boxed_type_register_static (g_intern_static_string ("GStrv"),

					    (GBoxedCopyFunc) g_strdupv,

					    (GBoxedFreeFunc) g_strfreev);

  return type_id;

}

static gpointer

gstring_copy (gpointer boxed)

{

  const GString *src_gstring = boxed;

  return g_string_new_len (src_gstring->str, src_gstring->len);

}

static void

gstring_free (gpointer boxed)

{

  GString *gstring = boxed;

  g_string_free (gstring, TRUE);

}

#if EMULATOR

#undef type_id

PLS(type_id,g_gstring_get_type ,GType)

#define type_id (*FUNCTION_NAME(type_id,g_gstring_get_type )())

#endif /* EMULATOR */

EXPORT_C GType

g_gstring_get_type (void)

{

  #if !(EMULATOR)

  static GType type_id = 0;

  #endif /* !(EMULATOR) */

  if (!type_id)

    type_id = g_boxed_type_register_static (g_intern_static_string ("GString"),

                                            /* the naming is a bit odd, but GString is obviously not G_TYPE_STRING */

					    gstring_copy,

					    gstring_free);

  return type_id;

}

static gpointer

hash_table_copy (gpointer boxed)

{

  GHashTable *hash_table = boxed;

  return g_hash_table_ref (hash_table);

}

static void

hash_table_free (gpointer boxed)

{

  GHashTable *hash_table = boxed;

  g_hash_table_unref (hash_table);

}

#if EMULATOR

#undef type_id

PLS(type_id,g_hash_table_get_type ,GType)

#define type_id (*FUNCTION_NAME(type_id,g_hash_table_get_type )())

#endif /* EMULATOR */

EXPORT_C GType

g_hash_table_get_type (void)

{

  #if !(EMULATOR)

  static GType type_id = 0;

  #endif */ !(EMULATOR) */

  if (!type_id)

    type_id = g_boxed_type_register_static (g_intern_static_string ("GHashTable"),

					    hash_table_copy, hash_table_free);

  return type_id;

}

#if EMULATOR

#undef type_id

PLS(type_id,g_regex_get_type ,GType)

#define type_id (*FUNCTION_NAME(type_id,g_regex_get_type )())

#endif /* EMULATOR */

EXPORT_C GType

g_regex_get_type (void)

{

 #if !(EMULATOR)

  static GType type_id = 0;

  #endif */ !(EMULATOR) */

#ifdef ENABLE_REGEX

  if (!type_id)

    type_id = g_boxed_type_register_static (g_intern_static_string ("GRegex"),

					    (GBoxedCopyFunc) g_regex_ref,

					    (GBoxedFreeFunc) g_regex_unref);

#endif

  return type_id;

}

#if EMULATOR

#undef type_id

#endif /* EMULATOR */

static void

boxed_proxy_value_init (GValue *value)

{

  value->data[0].v_pointer = NULL;

}

static void

boxed_proxy_value_free (GValue *value)

{

  if (value->data[0].v_pointer && !(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))

    {

      BoxedNode key, *node;

      key.type = G_VALUE_TYPE (value);

      node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);

      node->free (value->data[0].v_pointer);

    }

}

static void

boxed_proxy_value_copy (const GValue *src_value,

			GValue       *dest_value)

{

  if (src_value->data[0].v_pointer)

    {

      BoxedNode key, *node;

      key.type = G_VALUE_TYPE (src_value);

      node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);

      dest_value->data[0].v_pointer = node->copy (src_value->data[0].v_pointer);

    }

  else

    dest_value->data[0].v_pointer = src_value->data[0].v_pointer;

}

static gpointer

boxed_proxy_value_peek_pointer (const GValue *value)

{

  return value->data[0].v_pointer;

}

static gchar*

boxed_proxy_collect_value (GValue      *value,

			   guint        n_collect_values,

			   GTypeCValue *collect_values,

			   guint        collect_flags)

{

  BoxedNode key, *node;

  key.type = G_VALUE_TYPE (value);

  node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);

  if (!collect_values[0].v_pointer)

    value->data[0].v_pointer = NULL;

  else

    {

      if (collect_flags & G_VALUE_NOCOPY_CONTENTS)

	{

	  value->data[0].v_pointer = collect_values[0].v_pointer;

	  value->data[1].v_uint = G_VALUE_NOCOPY_CONTENTS;

	}

      else

	value->data[0].v_pointer = node->copy (collect_values[0].v_pointer);

    }

  return NULL;

}

static gchar*

boxed_proxy_lcopy_value (const GValue *value,

			 guint         n_collect_values,

			 GTypeCValue  *collect_values,

			 guint         collect_flags)

{

  gpointer *boxed_p = collect_values[0].v_pointer;

  if (!boxed_p)

    return g_strdup_printf ("value location for `%s' passed as NULL", G_VALUE_TYPE_NAME (value));

  if (!value->data[0].v_pointer)

    *boxed_p = NULL;

  else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)

    *boxed_p = value->data[0].v_pointer;

  else

    {

      BoxedNode key, *node;

      key.type = G_VALUE_TYPE (value);

      node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);

      *boxed_p = node->copy (value->data[0].v_pointer);

    }

  return NULL;

}

/**

 * g_boxed_type_register_static:

 * @name: Name of the new boxed type.

 * @boxed_copy: Boxed structure copy function.

 * @boxed_free: Boxed structure free function.

 *

 * This function creates a new %G_TYPE_BOXED derived type id for a new

 * boxed type with name @name. Boxed type handling functions have to be

 * provided to copy and free opaque boxed structures of this type.

 *

 * Returns: New %G_TYPE_BOXED derived type id for @name.

 */

EXPORT_C GType

g_boxed_type_register_static (const gchar   *name,

			      GBoxedCopyFunc boxed_copy,

			      GBoxedFreeFunc boxed_free)

{

  static const GTypeValueTable vtable = {

    boxed_proxy_value_init,

    boxed_proxy_value_free,

    boxed_proxy_value_copy,

    boxed_proxy_value_peek_pointer,

    "p",

    boxed_proxy_collect_value,

    "p",

    boxed_proxy_lcopy_value,

  };

  static const GTypeInfo type_info = {

    0,			/* class_size */

    NULL,		/* base_init */

    NULL,		/* base_finalize */

    NULL,		/* class_init */

    NULL,		/* class_finalize */

    NULL,		/* class_data */

    0,			/* instance_size */

    0,			/* n_preallocs */

    NULL,		/* instance_init */

    &vtable,		/* value_table */

  };

  GType type;

  g_return_val_if_fail (name != NULL, 0);

  g_return_val_if_fail (boxed_copy != NULL, 0);

  g_return_val_if_fail (boxed_free != NULL, 0);

  g_return_val_if_fail (g_type_from_name (name) == 0, 0);

  type = g_type_register_static (G_TYPE_BOXED, name, &type_info, 0);

  /* install proxy functions upon successfull registration */

  if (type)

    {

      BoxedNode key;

      key.type = type;

      key.copy = boxed_copy;

      key.free = boxed_free;

      boxed_bsa = g_bsearch_array_insert (boxed_bsa, &boxed_bconfig, &key);

    }

  return type;

}

/**

 * g_boxed_copy:

 * @boxed_type: The type of @src_boxed.

 * @src_boxed: The boxed structure to be copied.

 * 

 * Provide a copy of a boxed structure @src_boxed which is of type @boxed_type.

 * 

 * Returns: The newly created copy of the boxed structure.

 */

EXPORT_C gpointer

g_boxed_copy (GType         boxed_type,

	      gconstpointer src_boxed)

{

  GTypeValueTable *value_table;

  gpointer dest_boxed;

  g_return_val_if_fail (G_TYPE_IS_BOXED (boxed_type), NULL);

  g_return_val_if_fail (G_TYPE_IS_ABSTRACT (boxed_type) == FALSE, NULL);

  g_return_val_if_fail (src_boxed != NULL, NULL);

  value_table = g_type_value_table_peek (boxed_type);

  if (!value_table)

    g_return_val_if_fail (G_TYPE_IS_VALUE_TYPE (boxed_type), NULL);

  /* check if our proxying implementation is used, we can short-cut here */

  if (value_table->value_copy == boxed_proxy_value_copy)

    {

      BoxedNode key, *node;

      key.type = boxed_type;

      node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);

      dest_boxed = node->copy ((gpointer) src_boxed);

    }

  else

    {

      GValue src_value, dest_value;

      /* we heavily rely on third-party boxed type value vtable

       * implementations to follow normal boxed value storage

       * (data[0].v_pointer is the boxed struct, and

       * data[1].v_uint holds the G_VALUE_NOCOPY_CONTENTS flag,

       * rest zero).

       * but then, we can expect that since we layed out the

       * g_boxed_*() API.

       * data[1].v_uint&G_VALUE_NOCOPY_CONTENTS shouldn't be set

       * after a copy.

       */

      /* equiv. to g_value_set_static_boxed() */

      value_meminit (&src_value, boxed_type);

      src_value.data[0].v_pointer = (gpointer) src_boxed;

      src_value.data[1].v_uint = G_VALUE_NOCOPY_CONTENTS;

      /* call third-party code copy function, fingers-crossed */

      value_meminit (&dest_value, boxed_type);

      value_table->value_copy (&src_value, &dest_value);

      /* double check and grouse if things went wrong */

      if (dest_value.data[1].v_ulong)

	g_warning ("the copy_value() implementation of type `%s' seems to make use of reserved GValue fields",

		   g_type_name (boxed_type));

      dest_boxed = dest_value.data[0].v_pointer;

    }

  return dest_boxed;

}

/**

 * g_boxed_free:

 * @boxed_type: The type of @boxed.

 * @boxed: The boxed structure to be freed.

 *

 * Free the boxed structure @boxed which is of type @boxed_type.

 */

EXPORT_C void

g_boxed_free (GType    boxed_type,

	      gpointer boxed)

{

  GTypeValueTable *value_table;

  g_return_if_fail (G_TYPE_IS_BOXED (boxed_type));

  g_return_if_fail (G_TYPE_IS_ABSTRACT (boxed_type) == FALSE);

  g_return_if_fail (boxed != NULL);

  value_table = g_type_value_table_peek (boxed_type);

  if (!value_table)

    g_return_if_fail (G_TYPE_IS_VALUE_TYPE (boxed_type));

  /* check if our proxying implementation is used, we can short-cut here */

  if (value_table->value_free == boxed_proxy_value_free)

    {

      BoxedNode key, *node;

      key.type = boxed_type;

      node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);

      node->free (boxed);

    }

  else

    {

      GValue value;

      /* see g_boxed_copy() on why we think we can do this */

      value_meminit (&value, boxed_type);

      value.data[0].v_pointer = boxed;

      value_table->value_free (&value);

    }

}

/**

 * g_value_get_boxed:

 * @value: a valid #GValue of %G_TYPE_BOXED derived type

 *

 * Get the contents of a %G_TYPE_BOXED derived #GValue.

 *

 * Returns: boxed contents of @value

 */

EXPORT_C gpointer

g_value_get_boxed (const GValue *value)

{

  g_return_val_if_fail (G_VALUE_HOLDS_BOXED (value), NULL);

  g_return_val_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)), NULL);

  return value->data[0].v_pointer;

}

/**

 * g_value_dup_boxed:

 * @value: a valid #GValue of %G_TYPE_BOXED derived type

 *

 * Get the contents of a %G_TYPE_BOXED derived #GValue.  Upon getting,

 * the boxed value is duplicated and needs to be later freed with

 * g_boxed_free(), e.g. like: g_boxed_free (G_VALUE_TYPE (@value),

 * return_value);

 *

 * Returns: boxed contents of @value

 */

EXPORT_C gpointer

g_value_dup_boxed (const GValue *value)

{

  g_return_val_if_fail (G_VALUE_HOLDS_BOXED (value), NULL);

  g_return_val_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)), NULL);

  return value->data[0].v_pointer ? g_boxed_copy (G_VALUE_TYPE (value), value->data[0].v_pointer) : NULL;

}

static inline void

value_set_boxed_internal (GValue       *value,

			  gconstpointer const_boxed,

			  gboolean      need_copy,

			  gboolean      need_free)

{

  BoxedNode key, *node;

  gpointer boxed = (gpointer) const_boxed;

  if (!boxed)

    {

      /* just resetting to NULL might not be desired, need to

       * have value reinitialized also (for values defaulting

       * to other default value states than a NULL data pointer),

       * g_value_reset() will handle this

       */

      g_value_reset (value);

      return;

    }

  key.type = G_VALUE_TYPE (value);

  node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);

  if (node)

    {

      /* we proxy this type, free contents and copy right away */

      if (value->data[0].v_pointer && !(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))

	node->free (value->data[0].v_pointer);

      value->data[1].v_uint = need_free ? 0 : G_VALUE_NOCOPY_CONTENTS;

      value->data[0].v_pointer = need_copy ? node->copy (boxed) : boxed;

    }

  else

    {

      /* we don't handle this type, free contents and let g_boxed_copy()

       * figure what's required

       */

      if (value->data[0].v_pointer && !(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))

	g_boxed_free (G_VALUE_TYPE (value), value->data[0].v_pointer);

      value->data[1].v_uint = need_free ? 0 : G_VALUE_NOCOPY_CONTENTS;

      value->data[0].v_pointer = need_copy ? g_boxed_copy (G_VALUE_TYPE (value), boxed) : boxed;

    }

}

/**

 * g_value_set_boxed:

 * @value: a valid #GValue of %G_TYPE_BOXED derived type

 * @v_boxed: boxed value to be set

 *

 * Set the contents of a %G_TYPE_BOXED derived #GValue to @v_boxed.

 */

EXPORT_C void

g_value_set_boxed (GValue       *value,

		   gconstpointer boxed)

{

  g_return_if_fail (G_VALUE_HOLDS_BOXED (value));

  g_return_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)));

  value_set_boxed_internal (value, boxed, TRUE, TRUE);

}

/**

 * g_value_set_static_boxed:

 * @value: a valid #GValue of %G_TYPE_BOXED derived type

 * @v_boxed: static boxed value to be set

 *

 * Set the contents of a %G_TYPE_BOXED derived #GValue to @v_boxed.

 * The boxed value is assumed to be static, and is thus not duplicated

 * when setting the #GValue.

 */

EXPORT_C void

g_value_set_static_boxed (GValue       *value,

			  gconstpointer boxed)

{

  g_return_if_fail (G_VALUE_HOLDS_BOXED (value));

  g_return_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)));

  value_set_boxed_internal (value, boxed, FALSE, FALSE);

}

/**

 * g_value_set_boxed_take_ownership:

 * @value: a valid #GValue of %G_TYPE_BOXED derived type

 * @v_boxed: duplicated unowned boxed value to be set

 *

 * This is an internal function introduced mainly for C marshallers.

 *

 * Deprecated: 2.4: Use g_value_take_boxed() instead.

 */

EXPORT_C void

g_value_set_boxed_take_ownership (GValue       *value,

				  gconstpointer boxed)

{

  g_value_take_boxed (value, boxed);

}

/**

 * g_value_take_boxed:

 * @value: a valid #GValue of %G_TYPE_BOXED derived type

 * @v_boxed: duplicated unowned boxed value to be set

 *

 * Sets the contents of a %G_TYPE_BOXED derived #GValue to @v_boxed

 * and takes over the ownership of the callers reference to @v_boxed;

 * the caller doesn't have to unref it any more.

 *

 * Since: 2.4

 */

EXPORT_C void

g_value_take_boxed (GValue       *value,

		    gconstpointer boxed)

{

  g_return_if_fail (G_VALUE_HOLDS_BOXED (value));

  g_return_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)));

  value_set_boxed_internal (value, boxed, FALSE, TRUE);

}

#define __G_BOXED_C__

#include "gobjectaliasdef.c"