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Support for %TypedArray%.prototype.set(typedArray [, offset]). (#2405)

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This patch allows developers to set a typedarray given a source typedarray. This patch
attempts to follow section 22.2.3.22.2 in the ECMAScript spec as closely as possible.

JerryScript-DCO-1.0-Signed-off-by: AnthonyCalandra anthony@anthony-calandra.com
This commit is contained in:
Anthony Calandra
2018-07-03 02:19:53 -04:00
committed by yichoi
parent a74bf7dc91
commit d5cd32b0c0
2 changed files with 218 additions and 8 deletions
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jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c
+124 -8
View File
@@ -646,32 +646,148 @@ ecma_builtin_typedarray_prototype_reverse (ecma_value_t this_arg) /**< this argu
return ecma_copy_value (this_arg);
} /* ecma_builtin_typedarray_prototype_reverse */
/**
* The %TypedArray%.prototype object's 'set' routine for a typedArray source
*
* See also:
* ES2015, 22.2.3.22, 22.2.3.22.2
*
* @return ecma value of undefined if success, error otherwise.
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_op_typedarray_set_with_typedarray (ecma_value_t this_arg, /**< this argument */
ecma_value_t arr_val, /**< typedarray object */
ecma_value_t offset_val) /**< offset value */
{
/* 6.~ 8. targetOffset */
ecma_number_t target_offset_num;
if (!ecma_is_value_empty (ecma_get_number (offset_val, &target_offset_num)))
{
return ecma_raise_range_error (ECMA_ERR_MSG ("Invalid offset"));
}
if (ecma_number_is_nan (target_offset_num))
{
target_offset_num = 0;
}
if (target_offset_num <= -1.0 || target_offset_num >= (ecma_number_t) UINT32_MAX + 0.5)
{
return ecma_raise_range_error (ECMA_ERR_MSG ("Invalid offset"));
}
ecma_object_t *target_typedarray_p = ecma_get_object_from_value (this_arg);
ecma_object_t *src_typedarray_p = ecma_get_object_from_value (arr_val);
/* 9. targetBuffer */
ecma_object_t *target_arraybuffer_p = ecma_typedarray_get_arraybuffer (target_typedarray_p);
lit_utf8_byte_t *target_buffer_p = ecma_typedarray_get_buffer (target_typedarray_p);
/* 11. targetLength */
ecma_length_t target_length = ecma_typedarray_get_length (target_typedarray_p);
/* 12. srcBuffer */
ecma_object_t *src_arraybuffer_p = ecma_typedarray_get_arraybuffer (src_typedarray_p);
lit_utf8_byte_t *src_buffer_p = ecma_typedarray_get_buffer (src_typedarray_p);
/* 15. targetType */
lit_magic_string_id_t target_class_id = ecma_object_get_class_name (target_typedarray_p);
/* 16. targetElementSize */
uint8_t target_shift = ecma_typedarray_get_element_size_shift (target_typedarray_p);
uint8_t target_element_size = (uint8_t) (1 << target_shift);
/* 17. targetByteOffset */
ecma_length_t target_byte_offset = ecma_typedarray_get_offset (target_typedarray_p);
/* 19. srcType */
lit_magic_string_id_t src_class_id = ecma_object_get_class_name (src_typedarray_p);
/* 20. srcElementSize */
uint8_t src_shift = ecma_typedarray_get_element_size_shift (src_typedarray_p);
uint8_t src_element_size = (uint8_t) (1 << src_shift);
/* 21. srcLength */
ecma_length_t src_length = ecma_typedarray_get_length (src_typedarray_p);
uint32_t src_length_uint32 = ecma_number_to_uint32 (src_length);
if ((ecma_number_t) src_length_uint32 != src_length)
{
return ecma_raise_range_error (ECMA_ERR_MSG ("Invalid source length"));
}
/* 22. srcByteOffset */
ecma_length_t src_byte_offset = ecma_typedarray_get_offset (src_typedarray_p);
/* 23. */
uint32_t target_offset_uint32 = ecma_number_to_uint32 (target_offset_num);
if ((int64_t) src_length_uint32 + target_offset_uint32 > target_length)
{
return ecma_raise_range_error (ECMA_ERR_MSG ("Invalid range of index"));
}
/* 24.d, 25. srcByteIndex */
ecma_length_t src_byte_index = 0;
if (src_arraybuffer_p != target_arraybuffer_p)
{
src_byte_index = src_byte_offset;
}
/* 26. targetByteIndex */
uint32_t target_byte_index = target_offset_uint32 * target_element_size + target_byte_offset;
/* 27. limit */
uint32_t limit = target_byte_index + target_element_size * src_length_uint32;
if (src_class_id == target_class_id)
{
memmove (target_buffer_p + target_byte_index, src_buffer_p + src_byte_index,
target_element_size * src_length_uint32);
}
else
{
while (target_byte_index < limit)
{
ecma_number_t elem_num = ecma_get_typedarray_element (src_buffer_p + src_byte_index, src_class_id);
ecma_set_typedarray_element (target_buffer_p + target_byte_index, elem_num, target_class_id);
src_byte_index += src_element_size;
target_byte_index += target_element_size;
}
}
return ECMA_VALUE_UNDEFINED;
} /* ecma_op_typedarray_set_with_typedarray */
/**
* The %TypedArray%.prototype object's 'set' routine
*
* See also:
* ES2015, 22.2.3.22, 22.2.3.22.1
*
* @return ecma value of undefined.
* @return ecma value of undefined if success, error otherwise.
* Returned value must be freed with ecma_free_value.
*/
ecma_value_t
ecma_builtin_typedarray_prototype_set (ecma_value_t this_arg, /**< this argument */
ecma_value_t arr_val, /**< array object */
ecma_value_t offset_val) /**< offset value */
{
/* 1. */
if (ecma_is_typedarray (arr_val))
{
/* 22.2.3.22.2 %TypedArray%.prototype(typedArray [, offset ]) is not supported */
return ecma_raise_type_error (ECMA_ERR_MSG ("TypedArray.set(typedArray [,offset]) is not supported."));
}
/* 2.~ 4. */
if (!ecma_is_typedarray (this_arg))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a TypedArray."));
}
/* 1. */
if (ecma_is_typedarray (arr_val))
{
/* 22.2.3.22.2 */
return ecma_op_typedarray_set_with_typedarray (this_arg, arr_val, offset_val);
}
/* 6.~ 8. targetOffset */
ecma_value_t ret_val = ECMA_VALUE_EMPTY;
ECMA_OP_TO_NUMBER_TRY_CATCH (target_offset_num, offset_val, ret_val);