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Add typedarray routine:reverse (#1585)

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JerryScript-DCO-1.0-Signed-off-by: Zidong Jiang zidong.jiang@intel.com
This commit is contained in:
Zidong Jiang
2017-02-17 01:32:13 +08:00
committed by Dániel Bátyai
parent 188dc46fe0
commit 4727202c8e
3 changed files with 67 additions and 0 deletions
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jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c
+43
View File
@@ -22,6 +22,7 @@
#include "ecma-conversion.h"
#include "ecma-function-object.h"
#include "ecma-typedarray-object.h"
#include "ecma-arraybuffer-object.h"
#include "ecma-try-catch-macro.h"
#include "jrt.h"
#include "jrt-libc-includes.h"
@@ -608,6 +609,48 @@ ecma_builtin_typedarray_prototype_filter (ecma_value_t this_arg, /**< this argum
return ret_value;
} /* ecma_builtin_typedarray_prototype_filter */
/**
* The %TypedArray%.prototype object's 'reverse' routine
*
* See also:
* ES2015, 22.2.3.21
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
ecma_value_t
ecma_builtin_typedarray_prototype_reverse (ecma_value_t this_arg) /**< this argument */
{
if (!ecma_is_typedarray (this_arg))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a TypedArray."));
}
ecma_object_t *obj_p = ecma_get_object_from_value (this_arg);
uint32_t len = ecma_typedarray_get_length (obj_p);
ecma_object_t *arraybuffer_p = ecma_typedarray_get_arraybuffer (obj_p);
lit_utf8_byte_t *buffer = (ecma_arraybuffer_get_buffer (arraybuffer_p)
+ ecma_typedarray_get_offset (obj_p));
uint8_t shift = ecma_typedarray_get_element_size_shift (obj_p);
uint8_t element_size = (uint8_t) (1 << shift);
uint32_t middle = (len / 2) << shift;
uint32_t buffer_last = (len << shift) - element_size;
for (uint32_t lower = 0; lower < middle; lower += element_size)
{
uint32_t upper = buffer_last - lower;
lit_utf8_byte_t *lower_p = buffer + lower;
lit_utf8_byte_t *upper_p = buffer + upper;
lit_utf8_byte_t tmp[8];
memcpy (&tmp[0], lower_p, element_size);
memcpy (lower_p, upper_p, element_size);
memcpy (upper_p, &tmp[0], element_size);
}
return ecma_copy_value (this_arg);
} /* ecma_builtin_typedarray_prototype_reverse */
/**
* @}
* @}
jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.inc.h
+1
View File
@@ -63,6 +63,7 @@ ROUTINE (LIT_MAGIC_STRING_MAP, ecma_builtin_typedarray_prototype_map, 2, 1)
ROUTINE (LIT_MAGIC_STRING_REDUCE, ecma_builtin_typedarray_prototype_reduce, 2, 1)
ROUTINE (LIT_MAGIC_STRING_REDUCE_RIGHT_UL, ecma_builtin_typedarray_prototype_reduce_right, 2, 1)
ROUTINE (LIT_MAGIC_STRING_FILTER, ecma_builtin_typedarray_prototype_filter, 2, 1)
ROUTINE (LIT_MAGIC_STRING_REVERSE, ecma_builtin_typedarray_prototype_reverse, 0, 0)
#undef SIMPLE_VALUE
#undef NUMBER_VALUE