/**
* g_value_register_transform_func: (skip)
* @src_type: Source type.
* @dest_type: Target type.
* @transform_func: a function which transforms values of type @src_type
* into value of type @dest_type
*
* Registers a value transformation function for use in g_value_transform().
* A previously registered transformation function for @src_type and @dest_type
* will be replaced.
*/
void
g_value_register_transform_func (GType src_type,
GType dest_type,
GValueTransform transform_func)
{
TransformEntry entry;
/* these checks won't pass for dynamic types.
* g_return_if_fail (G_TYPE_HAS_VALUE_TABLE (src_type));
* g_return_if_fail (G_TYPE_HAS_VALUE_TABLE (dest_type));
*/
g_return_if_fail (transform_func != NULL);
entry.src_type = src_type;
entry.dest_type = dest_type;
#if 0 /* let transform function replacement be a valid operation */
if (g_bsearch_array_lookup (transform_array, &transform_bconfig, &entry))
g_warning ("reregistering value transformation function (%p) for '%s' to '%s'",
transform_func,
g_type_name (src_type),
g_type_name (dest_type));
#endif
entry.func = transform_func;
transform_array = g_bsearch_array_replace (transform_array, &transform_bconfig, &entry);
}
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;
}
static GValueTransform
transform_func_lookup (GType src_type,
GType dest_type)
{
TransformEntry entry;
entry.src_type = src_type;
do
{
entry.dest_type = dest_type;
do
{
TransformEntry *e;
e = g_bsearch_array_lookup (transform_array, &transform_bconfig, &entry);
if (e)
{
/* need to check that there hasn't been a change in value handling */
if (g_type_value_table_peek (entry.dest_type) == g_type_value_table_peek (dest_type) &&
g_type_value_table_peek (entry.src_type) == g_type_value_table_peek (src_type))
return e->func;
}
entry.dest_type = g_type_parent (entry.dest_type);
}
while (entry.dest_type);
entry.src_type = g_type_parent (entry.src_type);
}
while (entry.src_type);
return NULL;
}
/**
* 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.
*/
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);
}
}
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;
}
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 heavil 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 fucntion, 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 ||
dest_value.data[2].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;
}
static void
boxed_proxy_value_init (GValue *value)
{
BoxedNode key, *node;
key.type = G_VALUE_TYPE (value);
node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);
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 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;
}
}
