Add %TypedArray%.prototype.fill(value, [ begin [, end ] ]) support. (#2415)

JerryScript-DCO-1.0-Signed-off-by: Anthony Calandra anthony@anthony-calandra.com

4 files changed, 85 insertions, 0 deletions

diff --git a/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c b/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c
index 4c6e090a..de59a65e 100644
--- a/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c
+++ b/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c
@@ -1195,6 +1195,88 @@ ecma_builtin_typedarray_prototype_subarray (ecma_value_t this_arg, /**< this arg
 } /* ecma_builtin_typedarray_prototype_subarray */
 
 /**
+ * The %TypedArray%.prototype object's 'fill' routine.
+ *
+ * See also:
+ *          ES2015, 22.2.3.8, 22.1.3.6
+ *
+ * @return ecma value
+ *         Returned value must be freed with ecma_free_value.
+ */
+static ecma_value_t
+ecma_builtin_typedarray_prototype_fill (ecma_value_t this_arg, /**< this argument */
+                                        ecma_value_t value, /**< value */
+                                        ecma_value_t begin, /**< begin */
+                                        ecma_value_t end) /**< end */
+{
+  if (!ecma_is_typedarray (this_arg))
+  {
+    return ecma_raise_type_error (ECMA_ERR_MSG ("Argument 'this' is not a TypedArray."));
+  }
+
+  ecma_number_t value_num;
+  ecma_value_t ret_value = ecma_get_number (value, &value_num);
+
+  if (!ecma_is_value_empty (ret_value))
+  {
+    return ret_value;
+  }
+
+  ecma_object_t *typedarray_p = ecma_get_object_from_value (this_arg);
+  ecma_object_t *typedarray_arraybuffer_p = ecma_typedarray_get_arraybuffer (typedarray_p);
+  lit_utf8_byte_t *buffer_p = ecma_arraybuffer_get_buffer (typedarray_arraybuffer_p);
+  ecma_length_t length = ecma_typedarray_get_length (typedarray_p);
+
+  uint32_t begin_index_uint32 = 0, end_index_uint32 = 0;
+
+  ECMA_OP_TO_NUMBER_TRY_CATCH (relative_begin, begin, ret_value);
+  begin_index_uint32 = ecma_builtin_helper_array_index_normalize (relative_begin, length);
+
+  if (ecma_is_value_undefined (end))
+  {
+    end_index_uint32 = (uint32_t) length;
+  }
+  else
+  {
+    ECMA_OP_TO_NUMBER_TRY_CATCH (relative_end, end, ret_value);
+
+    end_index_uint32 = ecma_builtin_helper_array_index_normalize (relative_end, length);
+
+    ECMA_OP_TO_NUMBER_FINALIZE (relative_end);
+  }
+
+  ECMA_OP_TO_NUMBER_FINALIZE (relative_begin);
+
+  if (!ecma_is_value_empty (ret_value))
+  {
+    return ret_value;
+  }
+
+  ecma_length_t subarray_length = 0;
+
+  if (end_index_uint32 > begin_index_uint32)
+  {
+    subarray_length = end_index_uint32 - begin_index_uint32;
+  }
+
+  uint8_t shift = ecma_typedarray_get_element_size_shift (typedarray_p);
+  ecma_length_t byte_offset = ecma_typedarray_get_offset (typedarray_p);
+  lit_magic_string_id_t class_id = ecma_object_get_class_name (typedarray_p);
+
+  uint8_t element_size = (uint8_t) (1 << shift);
+  uint32_t byte_index = byte_offset + begin_index_uint32 * element_size;
+  uint32_t limit = byte_index + subarray_length * element_size;
+
+  while (byte_index < limit)
+  {
+    ecma_set_typedarray_element (buffer_p + byte_index, value_num, class_id);
+    byte_index += element_size;
+  }
+
+  return ecma_copy_value (this_arg);
+} /* ecma_builtin_typedarray_prototype_fill */
+
+/**
  * @}
  * @}
  * @}
diff --git a/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.inc.h b/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.inc.h
index 02634ddf..0fbd5213 100644
--- a/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.inc.h
+++ b/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.inc.h
@@ -59,6 +59,7 @@ ROUTINE (LIT_MAGIC_STRING_FILTER, ecma_builtin_typedarray_prototype_filter, 2, 1
 ROUTINE (LIT_MAGIC_STRING_REVERSE, ecma_builtin_typedarray_prototype_reverse, 0, 0)
 ROUTINE (LIT_MAGIC_STRING_SET, ecma_builtin_typedarray_prototype_set, 2, 1)
 ROUTINE (LIT_MAGIC_STRING_SUBARRAY, ecma_builtin_typedarray_prototype_subarray, 2, 2)
+ROUTINE (LIT_MAGIC_STRING_FILL, ecma_builtin_typedarray_prototype_fill, 3, 1)
 
 #endif /* !CONFIG_DISABLE_ES2015_TYPEDARRAY_BUILTIN */
 
diff --git a/jerry-core/lit/lit-magic-strings.inc.h b/jerry-core/lit/lit-magic-strings.inc.h
index 874b5cf5..950725b7 100644
--- a/jerry-core/lit/lit-magic-strings.inc.h
+++ b/jerry-core/lit/lit-magic-strings.inc.h
@@ -108,6 +108,7 @@ LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_EVAL, "eval")
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_EXEC, "exec")
 #endif
 #if !defined (CONFIG_DISABLE_ES2015_TYPEDARRAY_BUILTIN)
+LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FILL, "fill")
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FROM, "from")
 #endif
 #if !defined (CONFIG_DISABLE_ARRAY_BUILTIN) \
diff --git a/jerry-core/lit/lit-magic-strings.ini b/jerry-core/lit/lit-magic-strings.ini
index acaa707d..3cd2161c 100644
--- a/jerry-core/lit/lit-magic-strings.ini
+++ b/jerry-core/lit/lit-magic-strings.ini
@@ -65,6 +65,7 @@ LIT_MAGIC_STRING_CALL = "call"
 LIT_MAGIC_STRING_CEIL = "ceil"
 LIT_MAGIC_STRING_EVAL = "eval"
 LIT_MAGIC_STRING_EXEC = "exec"
+LIT_MAGIC_STRING_FILL = "fill"
 LIT_MAGIC_STRING_FROM = "from"
 LIT_MAGIC_STRING_JOIN = "join"
 LIT_MAGIC_STRING_KEYS = "keys"