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gstvalue: enforce identical basic types in lists, arrays

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=322587
This commit is contained in:
Vincent Penquerc'h 2011-11-04 18:26:15 +00:00
parent c22bd7393a
commit b6abb9794c
1 changed files with 73 additions and 13 deletions
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86
gst/gstvalue.c
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@ -296,6 +296,58 @@ gst_value_lcopy_list_or_array (const GValue * value, guint n_collect_values,
return NULL;
}
static gboolean
gst_value_list_or_array_get_basic_type (const GValue * value, GType * type)
{
if (GST_VALUE_HOLDS_LIST (value)) {
if (VALUE_LIST_SIZE (value) == 0)
return FALSE;
return gst_value_list_or_array_get_basic_type (VALUE_LIST_GET_VALUE (value,
0), type);
}
if (GST_VALUE_HOLDS_ARRAY (value)) {
const GArray *array = (const GArray *) value->data[0].v_pointer;
if (array->len == 0)
return FALSE;
return gst_value_list_or_array_get_basic_type (&g_array_index (array,
GValue, 0), type);
}
*type = G_VALUE_TYPE (value);
return TRUE;
}
#define IS_RANGE_COMPAT(type1,type2,t1,t2) \
(((t1) == (type1) && (t2) == (type2)) || ((t2) == (type1) && (t1) == (type2)))
static gboolean
gst_value_list_or_array_are_compatible (const GValue * value1,
const GValue * value2)
{
GType basic_type1, basic_type2;
/* empty or same type is OK */
if (!gst_value_list_or_array_get_basic_type (value1, &basic_type1) ||
!gst_value_list_or_array_get_basic_type (value2, &basic_type2) ||
basic_type1 == basic_type2)
return TRUE;
/* ranges are distinct types for each bound type... */
if (IS_RANGE_COMPAT (G_TYPE_INT, GST_TYPE_INT_RANGE, basic_type1,
basic_type2))
return TRUE;
if (IS_RANGE_COMPAT (G_TYPE_INT64, GST_TYPE_INT64_RANGE, basic_type1,
basic_type2))
return TRUE;
if (IS_RANGE_COMPAT (G_TYPE_DOUBLE, GST_TYPE_DOUBLE_RANGE, basic_type1,
basic_type2))
return TRUE;
if (IS_RANGE_COMPAT (GST_TYPE_FRACTION, GST_TYPE_FRACTION_RANGE, basic_type1,
basic_type2))
return TRUE;
return FALSE;
}
/**
* gst_value_list_append_value:
* @value: a #GValue of type #GST_TYPE_LIST
@ -310,6 +362,8 @@ gst_value_list_append_value (GValue * value, const GValue * append_value)
g_return_if_fail (GST_VALUE_HOLDS_LIST (value));
g_return_if_fail (G_IS_VALUE (append_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
append_value));
gst_value_init_and_copy (&val, append_value);
g_array_append_vals ((GArray *) value->data[0].v_pointer, &val, 1);
@ -329,6 +383,8 @@ gst_value_list_prepend_value (GValue * value, const GValue * prepend_value)
g_return_if_fail (GST_VALUE_HOLDS_LIST (value));
g_return_if_fail (G_IS_VALUE (prepend_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
prepend_value));
gst_value_init_and_copy (&val, prepend_value);
g_array_prepend_vals ((GArray *) value->data[0].v_pointer, &val, 1);
@ -355,6 +411,7 @@ gst_value_list_concat (GValue * dest, const GValue * value1,
g_return_if_fail (G_VALUE_TYPE (dest) == 0);
g_return_if_fail (G_IS_VALUE (value1));
g_return_if_fail (G_IS_VALUE (value2));
g_return_if_fail (gst_value_list_or_array_are_compatible (value1, value2));
value1_length =
(GST_VALUE_HOLDS_LIST (value1) ? VALUE_LIST_SIZE (value1) : 1);
@ -412,6 +469,7 @@ gst_value_list_merge (GValue * dest, const GValue * value1,
g_return_if_fail (G_VALUE_TYPE (dest) == 0);
g_return_if_fail (G_IS_VALUE (value1));
g_return_if_fail (G_IS_VALUE (value2));
g_return_if_fail (gst_value_list_or_array_are_compatible (value1, value2));
value1_length =
(GST_VALUE_HOLDS_LIST (value1) ? VALUE_LIST_SIZE (value1) : 1);
@ -537,6 +595,8 @@ gst_value_array_append_value (GValue * value, const GValue * append_value)
g_return_if_fail (GST_VALUE_HOLDS_ARRAY (value));
g_return_if_fail (G_IS_VALUE (append_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
append_value));
gst_value_init_and_copy (&val, append_value);
g_array_append_vals ((GArray *) value->data[0].v_pointer, &val, 1);
@ -556,6 +616,8 @@ gst_value_array_prepend_value (GValue * value, const GValue * prepend_value)
g_return_if_fail (GST_VALUE_HOLDS_ARRAY (value));
g_return_if_fail (G_IS_VALUE (prepend_value));
g_return_if_fail (gst_value_list_or_array_are_compatible (value,
prepend_value));
gst_value_init_and_copy (&val, prepend_value);
g_array_prepend_vals ((GArray *) value->data[0].v_pointer, &val, 1);
@ -3509,34 +3571,32 @@ gst_value_can_union (const GValue * value1, const GValue * value2)
*
* Creates a GValue corresponding to the union of @value1 and @value2.
*
* Returns: always returns %TRUE
* Returns: TRUE if the union suceeded.
*/
/* FIXME: change return type to 'void'? */
gboolean
gst_value_union (GValue * dest, const GValue * value1, const GValue * value2)
{
GstValueUnionInfo *union_info;
const GstValueUnionInfo *union_info;
guint i, len;
GType type1, type2;
g_return_val_if_fail (dest != NULL, FALSE);
g_return_val_if_fail (G_IS_VALUE (value1), FALSE);
g_return_val_if_fail (G_IS_VALUE (value2), FALSE);
g_return_val_if_fail (gst_value_list_or_array_are_compatible (value1, value2),
FALSE);
len = gst_value_union_funcs->len;
type1 = G_VALUE_TYPE (value1);
type2 = G_VALUE_TYPE (value2);
for (i = 0; i < len; i++) {
union_info = &g_array_index (gst_value_union_funcs, GstValueUnionInfo, i);
if (union_info->type1 == G_VALUE_TYPE (value1) &&
union_info->type2 == G_VALUE_TYPE (value2)) {
if (union_info->func (dest, value1, value2)) {
return TRUE;
}
if (union_info->type1 == type1 && union_info->type2 == type2) {
return union_info->func (dest, value1, value2);
}
if (union_info->type1 == G_VALUE_TYPE (value2) &&
union_info->type2 == G_VALUE_TYPE (value1)) {
if (union_info->func (dest, value2, value1)) {
return TRUE;
}
if (union_info->type1 == type2 && union_info->type2 == type1) {
return union_info->func (dest, value2, value1);
}
}