/**
* Helper function to normalizing an array index
*
* This function clamps the given index to the [0, length] range.
* If the index is negative, it is used as the offset from the end of the array,
* to compute normalized index.
* If the index is greater than the length of the array, the normalized index will be the length of the array.
*
* See also:
* ECMA-262 v5, 15.4.4.10 steps 5-6, 7 (part 2) and 8
* ECMA-262 v5, 15.4.4.12 steps 5-6
* ECMA-262 v5, 15.4.4.14 steps 5
* ECMA-262 v5, 15.5.4.13 steps 4, 5 (part 2) and 6-7
*
* Used by:
* - The Array.prototype.slice routine.
* - The Array.prototype.splice routine.
* - The Array.prototype.indexOf routine.
* - The String.prototype.slice routine.
*
* @return uint32_t - the normalized value of the index
*/
uint32_t
ecma_builtin_helper_array_index_normalize (ecma_number_t index, /**< index */
uint32_t length) /**< array's length */
{
uint32_t norm_index;
if (!ecma_number_is_nan (index))
{
if (ecma_number_is_zero (index))
{
norm_index = 0;
}
else if (ecma_number_is_infinity (index))
{
norm_index = ecma_number_is_negative (index) ? 0 : length;
}
else
{
if (ecma_number_is_negative (index))
{
ecma_number_t index_neg = ecma_number_negate (index);
if (index_neg > length)
{
norm_index = 0;
}
else
{
norm_index = length - ecma_number_to_uint32 (index_neg);
}
}
else
{
if (index > length)
{
norm_index = length;
}
else
{
norm_index = ecma_number_to_uint32 (index);
}
}
}
}
else
{
norm_index = 0;
}
return norm_index;
} /* ecma_builtin_helper_array_index_normalize */
/**
* Helper function to normalizing a string index
*
* This function clamps the given index to the [0, length] range.
* If the index is negative, 0 value is used.
* If the index is greater than the length of the string, the normalized index will be the length of the string.
* NaN is mapped to zero or length depending on the nan_to_zero parameter.
*
* See also:
* ECMA-262 v5, 15.5.4.15
*
* Used by:
* - The String.prototype.substring routine.
* - The String.prototype.indexOf routine.
* - The ecma_builtin_helper_string_prototype_object_index_of helper routine.
*
* @return uint32_t - the normalized value of the index
*/
uint32_t
ecma_builtin_helper_string_index_normalize (ecma_number_t index, /**< index */
uint32_t length, /**< string's length */
bool nan_to_zero) /**< whether NaN is mapped to zero (t) or length (f) */
{
uint32_t norm_index = 0;
if (ecma_number_is_nan (index))
{
if (!nan_to_zero)
{
norm_index = length;
}
}
else if (!ecma_number_is_negative (index))
{
if (ecma_number_is_infinity (index))
{
norm_index = length;
}
else
{
norm_index = ecma_number_to_uint32 (index);
if (norm_index > length)
{
norm_index = length;
}
}
}
return norm_index;
} /* ecma_builtin_helper_string_index_normalize */
/**
* Allocate new ecma-string and fill it with ecma-number
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_ecma_string_from_number (ecma_number_t num) /**< ecma-number */
{
uint32_t uint32_num = ecma_number_to_uint32 (num);
if (num == ((ecma_number_t) uint32_num))
{
return ecma_new_ecma_string_from_uint32 (uint32_num);
}
if (ecma_number_is_nan (num))
{
return ecma_get_magic_string (LIT_MAGIC_STRING_NAN);
}
if (ecma_number_is_infinity (num))
{
lit_magic_string_id_t id = (ecma_number_is_negative (num) ? LIT_MAGIC_STRING_NEGATIVE_INFINITY_UL
: LIT_MAGIC_STRING_INFINITY_UL);
return ecma_get_magic_string (id);
}
lit_utf8_byte_t str_buf[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];
lit_utf8_size_t str_size = ecma_number_to_utf8_string (num, str_buf, sizeof (str_buf));
JERRY_ASSERT (str_size > 0);
#ifndef JERRY_NDEBUG
lit_magic_string_id_t magic_string_id;
lit_magic_string_ex_id_t magic_string_ex_id;
JERRY_ASSERT (!lit_is_utf8_string_magic (str_buf, str_size, &magic_string_id)
&& !lit_is_ex_utf8_string_magic (str_buf, str_size, &magic_string_ex_id));
#endif /* !JERRY_NDEBUG */
ecma_string_t *string_desc_p = jmem_heap_alloc_block (sizeof (ecma_string_t) + str_size);
string_desc_p->refs_and_container = ECMA_STRING_CONTAINER_HEAP_UTF8_STRING | ECMA_STRING_REF_ONE;
string_desc_p->hash = lit_utf8_string_calc_hash (str_buf, str_size);
string_desc_p->u.common_field = 0;
string_desc_p->u.utf8_string.size = (uint16_t) str_size;
string_desc_p->u.utf8_string.length = (uint16_t) str_size;
lit_utf8_byte_t *data_p = (lit_utf8_byte_t *) (string_desc_p + 1);
memcpy (data_p, str_buf, str_size);
return string_desc_p;
} /* ecma_new_ecma_string_from_number */
/**
* The Math object's 'round' routine
*
* See also:
* ECMA-262 v5, 15.8.2.15
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_math_object_round (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */
ecma_value_t arg) /**< routine's argument */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);
ecma_number_t *num_p = ecma_alloc_number ();
if (ecma_number_is_nan (arg_num)
|| ecma_number_is_zero (arg_num)
|| ecma_number_is_infinity (arg_num))
{
*num_p = arg_num;
}
else if (ecma_number_is_negative (arg_num)
&& arg_num >= -0.5f)
{
*num_p = ecma_number_negate (0.0f);
}
else
{
const ecma_number_t up_half = arg_num + 0.5f;
const ecma_number_t down_half = arg_num - 0.5f;
const ecma_number_t up_rounded = up_half - ecma_op_number_remainder (up_half, 1);
const ecma_number_t down_rounded = down_half - ecma_op_number_remainder (down_half, 1);
if (up_rounded - arg_num <= arg_num - down_rounded)
{
*num_p = up_rounded;
}
else
{
*num_p = down_rounded;
}
}
ret_value = ecma_make_number_value (num_p);
ECMA_OP_TO_NUMBER_FINALIZE (arg_num);
return ret_value;
} /* ecma_builtin_math_object_round */
/**
* The Function.prototype object's 'bind' routine
*
* See also:
* ECMA-262 v5, 15.3.4.5
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_function_prototype_object_bind (ecma_value_t this_arg, /**< this argument */
const ecma_value_t *arguments_list_p, /**< list of arguments */
ecma_length_t arguments_number) /**< number of arguments */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
/* 2. */
if (!ecma_op_is_callable (this_arg))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));
}
else
{
/* 4. 11. 18. */
ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);
ecma_object_t *function_p = ecma_create_object (prototype_obj_p,
false,
true,
ECMA_OBJECT_TYPE_BOUND_FUNCTION);
ecma_deref_object (prototype_obj_p);
/* 7. */
ecma_value_t *target_function_prop_p;
target_function_prop_p = ecma_create_internal_property (function_p,
ECMA_INTERNAL_PROPERTY_BOUND_FUNCTION_TARGET_FUNCTION);
ecma_object_t *this_arg_obj_p = ecma_get_object_from_value (this_arg);
ECMA_SET_INTERNAL_VALUE_POINTER (*target_function_prop_p, this_arg_obj_p);
/* 8. */
ecma_value_t *bound_this_prop_p;
bound_this_prop_p = ecma_create_internal_property (function_p, ECMA_INTERNAL_PROPERTY_BOUND_FUNCTION_BOUND_THIS);
const ecma_length_t arg_count = arguments_number;
if (arg_count > 0)
{
*bound_this_prop_p = ecma_copy_value_if_not_object (arguments_list_p[0]);
}
else
{
*bound_this_prop_p = ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
}
if (arg_count > 1)
{
ecma_collection_header_t *bound_args_collection_p;
bound_args_collection_p = ecma_new_values_collection (&arguments_list_p[1], arg_count - 1, false);
ecma_value_t *bound_args_prop_p;
bound_args_prop_p = ecma_create_internal_property (function_p, ECMA_INTERNAL_PROPERTY_BOUND_FUNCTION_BOUND_ARGS);
ECMA_SET_INTERNAL_VALUE_POINTER (*bound_args_prop_p, bound_args_collection_p);
}
/*
* [[Class]] property is not stored explicitly for objects of ECMA_OBJECT_TYPE_FUNCTION type.
*
* See also: ecma_object_get_class_name
*/
/* 16. */
ecma_number_t length = ECMA_NUMBER_ZERO;
ecma_string_t *magic_string_length_p = ecma_new_ecma_length_string ();
/* 15. */
if (ecma_object_get_class_name (this_arg_obj_p) == LIT_MAGIC_STRING_FUNCTION_UL)
{
ecma_value_t get_len_value = ecma_op_object_get (this_arg_obj_p, magic_string_length_p);
JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (get_len_value));
JERRY_ASSERT (ecma_is_value_number (get_len_value));
const ecma_length_t bound_arg_count = arg_count > 1 ? arg_count - 1 : 0;
/* 15.a */
length = ecma_get_number_from_value (get_len_value) - ((ecma_number_t) bound_arg_count);
ecma_free_value (get_len_value);
/* 15.b */
if (ecma_number_is_negative (length))
{
length = ECMA_NUMBER_ZERO;
}
}
/* 17. */
ecma_value_t completion = ecma_builtin_helper_def_prop (function_p,
magic_string_length_p,
ecma_make_number_value (length),
false, /* Writable */
false, /* Enumerable */
false, /* Configurable */
false); /* Failure handling */
JERRY_ASSERT (ecma_is_value_boolean (completion));
ecma_deref_ecma_string (magic_string_length_p);
/* 19-21. */
ecma_object_t *thrower_p = ecma_builtin_get (ECMA_BUILTIN_ID_TYPE_ERROR_THROWER);
ecma_property_descriptor_t prop_desc = ecma_make_empty_property_descriptor ();
{
prop_desc.is_enumerable_defined = true;
prop_desc.is_enumerable = false;
prop_desc.is_configurable_defined = true;
prop_desc.is_configurable = false;
prop_desc.is_get_defined = true;
prop_desc.get_p = thrower_p;
prop_desc.is_set_defined = true;
prop_desc.set_p = thrower_p;
}
ecma_string_t *magic_string_caller_p = ecma_get_magic_string (LIT_MAGIC_STRING_CALLER);
completion = ecma_op_object_define_own_property (function_p,
magic_string_caller_p,
&prop_desc,
false);
JERRY_ASSERT (ecma_is_value_boolean (completion));
ecma_deref_ecma_string (magic_string_caller_p);
ecma_string_t *magic_string_arguments_p = ecma_get_magic_string (LIT_MAGIC_STRING_ARGUMENTS);
completion = ecma_op_object_define_own_property (function_p,
magic_string_arguments_p,
&prop_desc,
false);
JERRY_ASSERT (ecma_is_value_boolean (completion));
ecma_deref_ecma_string (magic_string_arguments_p);
ecma_deref_object (thrower_p);
/* 22. */
ret_value = ecma_make_object_value (function_p);
}
return ret_value;
} /* ecma_builtin_function_prototype_object_bind */
/**
* ECMA abstract relational comparison routine.
*
* See also: ECMA-262 v5, 11.8.5
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_abstract_relational_compare (ecma_value_t x, /**< first operand */
ecma_value_t y, /**< second operand */
bool left_first) /**< 'LeftFirst' flag */
{
ecma_value_t ret_value = ECMA_VALUE_EMPTY;
/* 1., 2. */
ecma_value_t prim_first_converted_value = ecma_op_to_primitive (x, ECMA_PREFERRED_TYPE_NUMBER);
if (ECMA_IS_VALUE_ERROR (prim_first_converted_value))
{
return prim_first_converted_value;
}
ecma_value_t prim_second_converted_value = ecma_op_to_primitive (y, ECMA_PREFERRED_TYPE_NUMBER);
if (ECMA_IS_VALUE_ERROR (prim_second_converted_value))
{
ecma_free_value (prim_first_converted_value);
return prim_second_converted_value;
}
const ecma_value_t px = left_first ? prim_first_converted_value : prim_second_converted_value;
const ecma_value_t py = left_first ? prim_second_converted_value : prim_first_converted_value;
const bool is_px_string = ecma_is_value_string (px);
const bool is_py_string = ecma_is_value_string (py);
if (!(is_px_string && is_py_string))
{
/* 3. */
/* a. */
ECMA_OP_TO_NUMBER_TRY_CATCH (nx, px, ret_value);
ECMA_OP_TO_NUMBER_TRY_CATCH (ny, py, ret_value);
/* b. */
if (ecma_number_is_nan (nx)
|| ecma_number_is_nan (ny))
{
/* c., d. */
ret_value = ECMA_VALUE_UNDEFINED;
}
else
{
bool is_x_less_than_y = (nx < ny);
#ifndef JERRY_NDEBUG
bool is_x_less_than_y_check;
if (nx == ny
|| (ecma_number_is_zero (nx)
&& ecma_number_is_zero (ny)))
{
/* e., f., g. */
is_x_less_than_y_check = false;
}
else if (ecma_number_is_infinity (nx)
&& !ecma_number_is_negative (nx))
{
/* h. */
is_x_less_than_y_check = false;
}
else if (ecma_number_is_infinity (ny)
&& !ecma_number_is_negative (ny))
{
/* i. */
is_x_less_than_y_check = true;
}
else if (ecma_number_is_infinity (ny)
&& ecma_number_is_negative (ny))
{
/* j. */
is_x_less_than_y_check = false;
}
else if (ecma_number_is_infinity (nx)
&& ecma_number_is_negative (nx))
{
/* k. */
is_x_less_than_y_check = true;
}
else
{
/* l. */
JERRY_ASSERT (!ecma_number_is_nan (nx)
&& !ecma_number_is_infinity (nx));
JERRY_ASSERT (!ecma_number_is_nan (ny)
&& !ecma_number_is_infinity (ny));
JERRY_ASSERT (!(ecma_number_is_zero (nx)
&& ecma_number_is_zero (ny)));
if (nx < ny)
{
is_x_less_than_y_check = true;
}
else
{
is_x_less_than_y_check = false;
}
}
JERRY_ASSERT (is_x_less_than_y_check == is_x_less_than_y);
#endif /* !JERRY_NDEBUG */
ret_value = ecma_make_boolean_value (is_x_less_than_y);
}
ECMA_OP_TO_NUMBER_FINALIZE (ny);
ECMA_OP_TO_NUMBER_FINALIZE (nx);
}
else
{ /* 4. */
JERRY_ASSERT (is_px_string && is_py_string);
ecma_string_t *str_x_p = ecma_get_string_from_value (px);
ecma_string_t *str_y_p = ecma_get_string_from_value (py);
bool is_px_less = ecma_compare_ecma_strings_relational (str_x_p, str_y_p);
ret_value = ecma_make_boolean_value (is_px_less);
}
ecma_free_value (prim_second_converted_value);
ecma_free_value (prim_first_converted_value);
return ret_value;
} /* ecma_op_abstract_relational_compare */
/**
* The Number.prototype object's 'toPrecision' routine
*
* See also:
* ECMA-262 v5, 15.7.4.7
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_number_prototype_object_to_precision (ecma_value_t this_arg, /**< this argument */
ecma_value_t arg) /**< routine's argument */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
/* 1. */
ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);
ecma_number_t this_num = ecma_get_number_from_value (this_value);
/* 2. */
if (ecma_is_value_undefined (arg))
{
ret_value = ecma_builtin_number_prototype_object_to_string (this_arg, NULL, 0);
}
else
{
/* 3. */
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);
/* 4. */
if (ecma_number_is_nan (this_num))
{
ecma_string_t *nan_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_NAN);
ret_value = ecma_make_string_value (nan_str_p);
}
else
{
/* 6. */
bool is_negative = false;
if (ecma_number_is_negative (this_num) && !ecma_number_is_zero (this_num))
{
is_negative = true;
this_num *= -1;
}
/* 7. */
if (ecma_number_is_infinity (this_num))
{
ecma_string_t *infinity_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_INFINITY_UL);
if (is_negative)
{
ecma_string_t *neg_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_MINUS_CHAR);
ecma_string_t *neg_inf_str_p = ecma_concat_ecma_strings (neg_str_p, infinity_str_p);
ecma_deref_ecma_string (infinity_str_p);
ecma_deref_ecma_string (neg_str_p);
ret_value = ecma_make_string_value (neg_inf_str_p);
}
else
{
ret_value = ecma_make_string_value (infinity_str_p);
}
}
/* 8. */
else if (arg_num < 1.0 || arg_num >= 22.0)
{
ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
}
else
{
/* Get the parameters of the number if non-zero. */
lit_utf8_byte_t digits[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];
lit_utf8_size_t num_digits;
int32_t exponent;
if (!ecma_number_is_zero (this_num))
{
num_digits = ecma_number_to_decimal (this_num, digits, &exponent);
}
else
{
digits[0] = '0';
num_digits = 1;
exponent = 1;
}
int32_t precision = ecma_number_to_int32 (arg_num);
num_digits = ecma_builtin_number_prototype_helper_round (digits, num_digits, precision);
int buffer_size;
if (exponent < -5 || exponent > precision)
{
/* Exponential notation, precision + 1 digits for number, 5 for exponent, 1 for \0 */
buffer_size = precision + 1 + 5 + 1;
}
else if (exponent <= 0)
{
/* Fixed notation, -exponent + 2 digits for leading zeros, precision digits, 1 for \0 */
buffer_size = -exponent + 2 + precision + 1;
}
else
{
/* Fixed notation, precision + 1 digits for number, 1 for \0 */
buffer_size = precision + 1 + 1;
}
if (is_negative)
{
buffer_size++;
}
JMEM_DEFINE_LOCAL_ARRAY (buff, buffer_size, lit_utf8_byte_t);
lit_utf8_byte_t *actual_char_p = buff;
if (is_negative)
{
*actual_char_p++ = '-';
}
/* 10.c, Exponential notation.*/
if (exponent < -5 || exponent > precision)
{
actual_char_p += ecma_builtin_number_prototype_helper_to_string (digits,
num_digits,
1,
actual_char_p,
(lit_utf8_size_t) precision);
*actual_char_p++ = 'e';
exponent--;
if (exponent < 0)
{
exponent *= -1;
*actual_char_p++ = '-';
}
else
{
*actual_char_p++ = '+';
}
/* Add exponent digits. */
actual_char_p += ecma_uint32_to_utf8_string ((uint32_t) exponent, actual_char_p, 3);
}
/* Fixed notation. */
else
{
lit_utf8_size_t to_num_digits = ((exponent <= 0) ? (lit_utf8_size_t) (1 - exponent + precision)
: (lit_utf8_size_t) precision);
actual_char_p += ecma_builtin_number_prototype_helper_to_string (digits,
num_digits,
exponent,
actual_char_p,
to_num_digits);
}
JERRY_ASSERT (actual_char_p - buff < buffer_size);
*actual_char_p = '\0';
ecma_string_t *str_p = ecma_new_ecma_string_from_utf8 (buff, (lit_utf8_size_t) (actual_char_p - buff));
ret_value = ecma_make_string_value (str_p);
JMEM_FINALIZE_LOCAL_ARRAY (buff);
}
}
ECMA_OP_TO_NUMBER_FINALIZE (arg_num);
}
ECMA_FINALIZE (this_value);
return ret_value;
} /* ecma_builtin_number_prototype_object_to_precision */
/**
* The Number.prototype object's 'toExponential' routine
*
* See also:
* ECMA-262 v5, 15.7.4.6
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_number_prototype_object_to_exponential (ecma_value_t this_arg, /**< this argument */
ecma_value_t arg) /**< routine's argument */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
/* 1. */
ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);
ecma_number_t this_num = ecma_get_number_from_value (this_value);
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);
/* 7. */
if (arg_num <= -1.0 || arg_num >= 21.0)
{
ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
}
else
{
/* 3. */
if (ecma_number_is_nan (this_num))
{
ecma_string_t *nan_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_NAN);
ret_value = ecma_make_string_value (nan_str_p);
}
else
{
/* 5. */
bool is_negative = false;
if (ecma_number_is_negative (this_num) && !ecma_number_is_zero (this_num))
{
is_negative = true;
this_num *= -1;
}
/* 6. */
if (ecma_number_is_infinity (this_num))
{
ecma_string_t *infinity_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_INFINITY_UL);
if (is_negative)
{
ecma_string_t *neg_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_MINUS_CHAR);
ecma_string_t *neg_inf_str_p = ecma_concat_ecma_strings (neg_str_p, infinity_str_p);
ecma_deref_ecma_string (infinity_str_p);
ecma_deref_ecma_string (neg_str_p);
ret_value = ecma_make_string_value (neg_inf_str_p);
}
else
{
ret_value = ecma_make_string_value (infinity_str_p);
}
}
else
{
/* Get the parameters of the number if non zero. */
lit_utf8_byte_t digits[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];
lit_utf8_size_t num_digits;
int32_t exponent;
if (!ecma_number_is_zero (this_num))
{
num_digits = ecma_number_to_decimal (this_num, digits, &exponent);
}
else
{
digits[0] = '0';
num_digits = 1;
exponent = 1;
}
int32_t frac_digits;
if (ecma_is_value_undefined (arg))
{
frac_digits = (int32_t) num_digits - 1;
}
else
{
frac_digits = ecma_number_to_int32 (arg_num);
}
num_digits = ecma_builtin_number_prototype_helper_round (digits, num_digits, frac_digits + 1);
/* frac_digits + 2 characters for number, 5 characters for exponent, 1 for \0. */
int buffer_size = frac_digits + 2 + 5 + 1;
if (is_negative)
{
/* +1 character for sign. */
buffer_size++;
}
JMEM_DEFINE_LOCAL_ARRAY (buff, buffer_size, lit_utf8_byte_t);
lit_utf8_byte_t *actual_char_p = buff;
if (is_negative)
{
*actual_char_p++ = '-';
}
actual_char_p += ecma_builtin_number_prototype_helper_to_string (digits,
num_digits,
1,
actual_char_p,
(lit_utf8_size_t) (frac_digits + 1));
*actual_char_p++ = 'e';
exponent--;
if (exponent < 0)
{
exponent *= -1;
*actual_char_p++ = '-';
}
else
{
*actual_char_p++ = '+';
}
/* Add exponent digits. */
actual_char_p += ecma_uint32_to_utf8_string ((uint32_t) exponent, actual_char_p, 3);
JERRY_ASSERT (actual_char_p - buff < buffer_size);
*actual_char_p = '\0';
ecma_string_t *str = ecma_new_ecma_string_from_utf8 (buff, (lit_utf8_size_t) (actual_char_p - buff));
ret_value = ecma_make_string_value (str);
JMEM_FINALIZE_LOCAL_ARRAY (buff);
}
}
}
ECMA_OP_TO_NUMBER_FINALIZE (arg_num);
ECMA_FINALIZE (this_value);
return ret_value;
} /* ecma_builtin_number_prototype_object_to_exponential */
/**
* The Number.prototype object's 'toFixed' routine
*
* See also:
* ECMA-262 v5, 15.7.4.5
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_number_prototype_object_to_fixed (ecma_value_t this_arg, /**< this argument */
ecma_value_t arg) /**< routine's argument */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);
ecma_number_t this_num = ecma_get_number_from_value (this_value);
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);
/* 2. */
if (arg_num <= -1 || arg_num >= 21)
{
ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
}
else
{
/* 4. */
if (ecma_number_is_nan (this_num))
{
ecma_string_t *nan_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_NAN);
ret_value = ecma_make_string_value (nan_str_p);
}
else
{
/* 6. */
bool is_negative = false;
if (ecma_number_is_negative (this_num))
{
is_negative = true;
this_num *= -1;
}
/* We handle infinities separately. */
if (ecma_number_is_infinity (this_num))
{
ecma_string_t *infinity_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_INFINITY_UL);
if (is_negative)
{
ecma_string_t *neg_str_p = ecma_new_ecma_string_from_utf8 ((const lit_utf8_byte_t *) "-", 1);
ecma_string_t *neg_inf_str_p = ecma_concat_ecma_strings (neg_str_p, infinity_str_p);
ecma_deref_ecma_string (infinity_str_p);
ecma_deref_ecma_string (neg_str_p);
ret_value = ecma_make_string_value (neg_inf_str_p);
}
else
{
ret_value = ecma_make_string_value (infinity_str_p);
}
}
else
{
/* Get the parameters of the number if non-zero. */
lit_utf8_byte_t digits[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];
lit_utf8_size_t num_digits;
int32_t exponent;
if (!ecma_number_is_zero (this_num))
{
num_digits = ecma_number_to_decimal (this_num, digits, &exponent);
}
else
{
digits[0] = '0';
num_digits = 1;
exponent = 1;
}
/* 7. */
if (exponent > 21)
{
ret_value = ecma_builtin_number_prototype_object_to_string (this_arg, NULL, 0);
}
/* 8. */
else
{
/* 1. */
int32_t frac_digits = ecma_number_to_int32 (arg_num);
num_digits = ecma_builtin_number_prototype_helper_round (digits, num_digits, exponent + frac_digits);
/* Buffer that is used to construct the string. */
int buffer_size = (exponent > 0) ? exponent + frac_digits + 2 : frac_digits + 3;
if (is_negative)
{
buffer_size++;
}
JERRY_ASSERT (buffer_size > 0);
JMEM_DEFINE_LOCAL_ARRAY (buff, buffer_size, lit_utf8_byte_t);
lit_utf8_byte_t *p = buff;
if (is_negative)
{
*p++ = '-';
}
lit_utf8_size_t to_num_digits = ((exponent > 0) ? (lit_utf8_size_t) (exponent + frac_digits)
: (lit_utf8_size_t) (frac_digits + 1));
p += ecma_builtin_number_prototype_helper_to_string (digits,
num_digits,
exponent,
p,
to_num_digits);
JERRY_ASSERT (p - buff < buffer_size);
/* String terminator. */
*p = 0;
ecma_string_t *str = ecma_new_ecma_string_from_utf8 (buff, (lit_utf8_size_t) (p - buff));
ret_value = ecma_make_string_value (str);
JMEM_FINALIZE_LOCAL_ARRAY (buff);
}
}
}
}
ECMA_OP_TO_NUMBER_FINALIZE (arg_num);
ECMA_FINALIZE (this_value);
return ret_value;
} /* ecma_builtin_number_prototype_object_to_fixed */
/**
* The Number.prototype object's 'toString' routine
*
* See also:
* ECMA-262 v5, 15.7.4.2
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_number_prototype_object_to_string (ecma_value_t this_arg, /**< this argument */
const ecma_value_t *arguments_list_p, /**< arguments list */
ecma_length_t arguments_list_len) /**< number of arguments */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);
ecma_number_t this_arg_number = ecma_get_number_from_value (this_value);
if (arguments_list_len == 0
|| ecma_number_is_nan (this_arg_number)
|| ecma_number_is_infinity (this_arg_number)
|| ecma_number_is_zero (this_arg_number)
|| (arguments_list_len > 0 && ecma_is_value_undefined (arguments_list_p[0])))
{
ecma_string_t *ret_str_p = ecma_new_ecma_string_from_number (this_arg_number);
ret_value = ecma_make_string_value (ret_str_p);
}
else
{
static const lit_utf8_byte_t digit_chars[36] =
{
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
'u', 'v', 'w', 'x', 'y', 'z'
};
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arguments_list_p[0], ret_value);
uint32_t radix = ecma_number_to_uint32 (arg_num);
if (radix < 2 || radix > 36)
{
ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
}
else if (radix == 10)
{
ecma_string_t *ret_str_p = ecma_new_ecma_string_from_number (this_arg_number);
ret_value = ecma_make_string_value (ret_str_p);
}
else
{
bool is_negative = false;
if (ecma_number_is_negative (this_arg_number))
{
this_arg_number = -this_arg_number;
is_negative = true;
}
lit_utf8_byte_t digits[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];
int32_t exponent;
lit_utf8_size_t num_digits = ecma_number_to_decimal (this_arg_number, digits, &exponent);
exponent = exponent - (int32_t) num_digits;
/* Calculate the scale of the number in the specified radix. */
int scale = (int) -floor ((log (10) / log (radix)) * exponent);
bool is_scale_negative = false;
if (scale < 0)
{
is_scale_negative = true;
scale = -scale;
}
int buff_size;
if (is_scale_negative)
{
buff_size = (int) floor (log (this_arg_number) / log (radix)) + 1;
}
else
{
buff_size = scale + ECMA_NUMBER_FRACTION_WIDTH + 2;
}
if (is_negative)
{
buff_size++;
}
/* Normalize the number, so that it is as close to 0 exponent as possible. */
if (is_scale_negative)
{
for (int i = 0; i < scale; i++)
{
this_arg_number /= (ecma_number_t) radix;
}
}
else
{
for (int i = 0; i < scale; i++)
{
this_arg_number *= (ecma_number_t) radix;
}
}
uint64_t whole = (uint64_t) this_arg_number;
ecma_number_t fraction = this_arg_number - (ecma_number_t) whole;
bool should_round = false;
if (!ecma_number_is_zero (fraction) && is_scale_negative)
{
/* Add one extra digit for rounding. */
buff_size++;
should_round = true;
}
JMEM_DEFINE_LOCAL_ARRAY (buff, buff_size, lit_utf8_byte_t);
int buff_index = 0;
/* Calculate digits for whole part. */
while (whole > 0)
{
buff[buff_index++] = (lit_utf8_byte_t) (whole % radix);
whole /= radix;
}
/* Calculate where we have to put the radix point. */
int point = is_scale_negative ? buff_index + scale : buff_index - scale;
/* Reverse the digits, since they are backwards. */
for (int i = 0; i < buff_index / 2; i++)
{
lit_utf8_byte_t swap = buff[i];
buff[i] = buff[buff_index - i - 1];
buff[buff_index - i - 1] = swap;
}
int required_digits = buff_size;
if (is_negative)
{
required_digits--;
}
if (!is_scale_negative)
{
/* Leave space for leading zeros / radix point. */
required_digits -= scale + 1;
}
/* Calculate digits for fractional part. */
while (buff_index < required_digits && (fraction != 0 || is_scale_negative))
{
fraction *= (ecma_number_t) radix;
lit_utf8_byte_t digit = (lit_utf8_byte_t) floor (fraction);
buff[buff_index++] = digit;
fraction -= (ecma_number_t) floor (fraction);
}
if (should_round)
{
/* Round off last digit. */
if (buff[buff_index - 1] > radix / 2)
{
buff[buff_index - 2]++;
}
buff_index--;
/* Propagate carry. */
for (int i = buff_index - 1; i > 0 && buff[i] >= radix; i--)
{
buff[i] = (lit_utf8_byte_t) (buff[i] - radix);
buff[i - 1]++;
}
/* Carry propagated over the whole number, need to add a leading digit. */
if (buff[0] >= radix)
{
memmove (buff + 1, buff, (size_t) buff_index);
buff_index++;
buff[0] = 1;
}
}
/* Remove trailing zeros from fraction. */
while (buff_index - 1 > point && buff[buff_index - 1] == 0)
{
buff_index--;
}
/* Add leading zeros in case place of radix point is negative. */
if (point <= 0)
{
memmove (buff - point + 1, buff, (size_t) buff_index);
buff_index += -point + 1;
for (int i = 0; i < -point + 1; i++)
{
buff[i] = 0;
}
point = 1;
}
/* Convert digits to characters. */
for (int i = 0; i < buff_index; i++)
{
buff[i] = digit_chars[buff[i]];
}
/* Place radix point to the required position. */
if (point < buff_index)
{
memmove (buff + point + 1, buff + point, (size_t) buff_index);
buff[point] = '.';
buff_index++;
}
/* Add negative sign if necessary. */
if (is_negative)
{
memmove (buff + 1, buff, (size_t) buff_index);
buff_index++;
buff[0] = '-';
}
JERRY_ASSERT (buff_index <= buff_size);
ecma_string_t *str_p = ecma_new_ecma_string_from_utf8 (buff, (lit_utf8_size_t) buff_index);
ret_value = ecma_make_string_value (str_p);
JMEM_FINALIZE_LOCAL_ARRAY (buff);
}
ECMA_OP_TO_NUMBER_FINALIZE (arg_num);
}
ECMA_FINALIZE (this_value);
return ret_value;
} /* ecma_builtin_number_prototype_object_to_string */
/**
* SameValue operation.
*
* See also:
* ECMA-262 v5, 9.12
*
* @return true - if the value are same according to ECMA-defined SameValue algorithm,
* false - otherwise.
*/
bool
ecma_op_same_value (ecma_value_t x, /**< ecma value */
ecma_value_t y) /**< ecma value */
{
const bool is_x_undefined = ecma_is_value_undefined (x);
const bool is_x_null = ecma_is_value_null (x);
const bool is_x_boolean = ecma_is_value_boolean (x);
const bool is_x_number = ecma_is_value_number (x);
const bool is_x_string = ecma_is_value_string (x);
const bool is_x_object = ecma_is_value_object (x);
const bool is_y_undefined = ecma_is_value_undefined (y);
const bool is_y_null = ecma_is_value_null (y);
const bool is_y_boolean = ecma_is_value_boolean (y);
const bool is_y_number = ecma_is_value_number (y);
const bool is_y_string = ecma_is_value_string (y);
const bool is_y_object = ecma_is_value_object (y);
const bool is_types_equal = ((is_x_undefined && is_y_undefined)
|| (is_x_null && is_y_null)
|| (is_x_boolean && is_y_boolean)
|| (is_x_number && is_y_number)
|| (is_x_string && is_y_string)
|| (is_x_object && is_y_object));
if (!is_types_equal)
{
return false;
}
else if (is_x_undefined || is_x_null)
{
return true;
}
else if (is_x_number)
{
ecma_number_t x_num = ecma_get_number_from_value (x);
ecma_number_t y_num = ecma_get_number_from_value (y);
bool is_x_nan = ecma_number_is_nan (x_num);
bool is_y_nan = ecma_number_is_nan (y_num);
if (is_x_nan || is_y_nan)
{
/*
* If both are NaN
* return true;
* else
* // one of the numbers is NaN, and another - is not
* return false;
*/
return (is_x_nan && is_y_nan);
}
else if (ecma_number_is_zero (x_num)
&& ecma_number_is_zero (y_num)
&& ecma_number_is_negative (x_num) != ecma_number_is_negative (y_num))
{
return false;
}
else
{
return (x_num == y_num);
}
}
else if (is_x_string)
{
ecma_string_t *x_str_p = ecma_get_string_from_value (x);
ecma_string_t *y_str_p = ecma_get_string_from_value (y);
return ecma_compare_ecma_strings (x_str_p, y_str_p);
}
else if (is_x_boolean)
{
return (ecma_is_value_true (x) == ecma_is_value_true (y));
}
else
{
JERRY_ASSERT (is_x_object);
return (ecma_get_object_from_value (x) == ecma_get_object_from_value (y));
}
} /* ecma_op_same_value */
/**
* SameValue operation.
*
* See also:
* ECMA-262 v5, 9.12
*
* @return true - if the value are same according to ECMA-defined SameValue algorithm,
* false - otherwise.
*/
bool
ecma_op_same_value (ecma_value_t x, /**< ecma-value */
ecma_value_t y) /**< ecma-value */
{
const bool is_x_undefined = ecma_is_value_undefined (x);
const bool is_x_null = ecma_is_value_null (x);
const bool is_x_boolean = ecma_is_value_boolean (x);
const bool is_x_number = ecma_is_value_number (x);
const bool is_x_string = ecma_is_value_string (x);
const bool is_x_object = ecma_is_value_object (x);
const bool is_y_undefined = ecma_is_value_undefined (y);
const bool is_y_null = ecma_is_value_null (y);
const bool is_y_boolean = ecma_is_value_boolean (y);
const bool is_y_number = ecma_is_value_number (y);
const bool is_y_string = ecma_is_value_string (y);
const bool is_y_object = ecma_is_value_object (y);
const bool is_types_equal = ((is_x_undefined && is_y_undefined)
|| (is_x_null && is_y_null)
|| (is_x_boolean && is_y_boolean)
|| (is_x_number && is_y_number)
|| (is_x_string && is_y_string)
|| (is_x_object && is_y_object));
if (!is_types_equal)
{
return false;
}
if (is_x_undefined
|| is_x_null)
{
return true;
}
if (is_x_number)
{
ecma_number_t *x_num_p = ecma_get_number_from_value (x);
ecma_number_t *y_num_p = ecma_get_number_from_value (y);
if (ecma_number_is_nan (*x_num_p)
&& ecma_number_is_nan (*y_num_p))
{
return true;
}
else if (ecma_number_is_zero (*x_num_p)
&& ecma_number_is_zero (*y_num_p)
&& ecma_number_is_negative (*x_num_p) != ecma_number_is_negative (*y_num_p))
{
return false;
}
return (*x_num_p == *y_num_p);
}
if (is_x_string)
{
ecma_string_t* x_str_p = ecma_get_string_from_value (x);
ecma_string_t* y_str_p = ecma_get_string_from_value (y);
return ecma_compare_ecma_strings (x_str_p, y_str_p);
}
if (is_x_boolean)
{
return (ecma_is_value_true (x) == ecma_is_value_true (y));
}
JERRY_ASSERT (is_x_object);
return (ecma_get_object_from_value (x) == ecma_get_object_from_value (y));
} /* ecma_op_same_value */
/**
* The Math object's 'min' routine
*
* See also:
* ECMA-262 v5, 15.8.2.12
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_math_object_min (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */
const ecma_value_t args[], /**< arguments list */
ecma_length_t args_number) /**< number of arguments */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
ecma_number_t ret_num = ecma_number_make_infinity (false);
bool is_NaN = false;
for (ecma_length_t arg_index = 0;
arg_index < args_number && ecma_is_value_empty (ret_value);
arg_index++)
{
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, args[arg_index], ret_value);
if (!is_NaN)
{
if (unlikely (ecma_number_is_nan (arg_num)))
{
ret_num = arg_num;
is_NaN = true;
}
else if (ecma_number_is_zero (arg_num) /* both numbers are zeroes */
&& ecma_number_is_zero (ret_num))
{
if (ecma_number_is_negative (arg_num))
{
ret_num = arg_num;
}
}
else if (ecma_number_is_infinity (arg_num))
{
if (ecma_number_is_negative (arg_num))
{
ret_num = arg_num;
}
}
else if (ecma_number_is_infinity (ret_num))
{
if (!ecma_number_is_negative (ret_num))
{
ret_num = arg_num;
}
}
else
{
JERRY_ASSERT (!ecma_number_is_nan (arg_num)
&& !ecma_number_is_infinity (arg_num));
JERRY_ASSERT (!ecma_number_is_nan (ret_num)
&& !ecma_number_is_infinity (ret_num));
if (arg_num < ret_num)
{
ret_num = arg_num;
}
}
}
ECMA_OP_TO_NUMBER_FINALIZE (arg_num);
}
if (ecma_is_value_empty (ret_value))
{
ecma_number_t *num_p = ecma_alloc_number ();
*num_p = ret_num;
ret_value = ecma_make_number_value (num_p);
}
return ret_value;
} /* ecma_builtin_math_object_min */
/**
* The Number.prototype object's 'toPrecision' routine
*
* See also:
* ECMA-262 v5, 15.7.4.7
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_number_prototype_object_to_precision (ecma_value_t this_arg, /**< this argument */
ecma_value_t arg) /**< routine's argument */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
/* 1. */
ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);
ecma_number_t this_num = *ecma_get_number_from_value (this_value);
/* 2. */
if (ecma_is_value_undefined (arg))
{
ret_value = ecma_builtin_number_prototype_object_to_string (this_arg, NULL, 0);
}
else
{
/* 3. */
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);
/* 4. */
if (ecma_number_is_nan (this_num))
{
ecma_string_t *nan_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_NAN);
ret_value = ecma_make_string_value (nan_str_p);
}
else
{
bool is_negative = false;
/* 6. */
if (ecma_number_is_negative (this_num) && !ecma_number_is_zero (this_num))
{
is_negative = true;
this_num *= -1;
}
/* 7. */
if (ecma_number_is_infinity (this_num))
{
ecma_string_t *infinity_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_INFINITY_UL);
if (is_negative)
{
ecma_string_t *neg_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_MINUS_CHAR);
ecma_string_t *neg_inf_str_p = ecma_concat_ecma_strings (neg_str_p, infinity_str_p);
ecma_deref_ecma_string (infinity_str_p);
ecma_deref_ecma_string (neg_str_p);
ret_value = ecma_make_string_value (neg_inf_str_p);
}
else
{
ret_value = ecma_make_string_value (infinity_str_p);
}
}
/* 8. */
else if (arg_num < 1.0 || arg_num >= 22.0)
{
ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
}
else
{
uint64_t digits = 0;
int32_t num_digits = 0;
int32_t exponent = 1;
int32_t precision = ecma_number_to_int32 (arg_num);
/* Get the parameters of the number if non-zero. */
if (!ecma_number_is_zero (this_num))
{
ecma_number_to_decimal (this_num, &digits, &num_digits, &exponent);
}
digits = ecma_builtin_number_prototype_helper_round (digits, num_digits - precision);
int buffer_size;
if (exponent < -5 || exponent > precision)
{
/* Exponential notation, precision + 1 digits for number, 5 for exponent, 1 for \0 */
buffer_size = precision + 1 + 5 + 1;
}
else if (exponent <= 0)
{
/* Fixed notation, -exponent + 2 digits for leading zeros, precision digits, 1 for \0 */
buffer_size = -exponent + 2 + precision + 1;
}
else
{
/* Fixed notation, precision + 1 digits for number, 1 for \0 */
buffer_size = precision + 1 + 1;
}
if (is_negative)
{
buffer_size++;
}
MEM_DEFINE_LOCAL_ARRAY (buff, buffer_size, lit_utf8_byte_t);
lit_utf8_byte_t *actual_char_p = buff;
uint64_t scale = 1;
/* Calculate the magnitude of the number. This is used to get the digits from left to right. */
while (scale <= digits)
{
scale *= 10;
}
if (is_negative)
{
*actual_char_p++ = '-';
}
int digit = 0;
/* 10.c, Exponential notation.*/
if (exponent < -5 || exponent > precision)
{
/* Add significant digits. */
for (int i = 1; i <= precision; i++)
{
digit = 0;
scale /= 10;
while (digits >= scale && scale > 0)
{
digits -= scale;
digit++;
}
*actual_char_p++ = (lit_utf8_byte_t) (digit + '0');
if (i == 1 && i != precision)
{
*actual_char_p++ = '.';
}
}
*actual_char_p++ = 'e';
exponent--;
if (exponent < 0)
{
exponent *= -1;
*actual_char_p++ = '-';
}
else
{
*actual_char_p++ = '+';
}
/* Get magnitude of exponent. */
int32_t scale_expt = 1;
while (scale_expt <= exponent)
{
scale_expt *= 10;
}
scale_expt /= 10;
/* Add exponent digits. */
if (exponent == 0)
{
*actual_char_p++ = '0';
}
else
{
while (scale_expt > 0)
{
digit = exponent / scale_expt;
exponent %= scale_expt;
*actual_char_p++ = (lit_utf8_byte_t) (digit + '0');
scale_expt /= 10;
}
}
}
/* Fixed notation. */
else
{
/* Add leading zeros if neccessary. */
if (exponent <= 0)
{
*actual_char_p++ = '0';
*actual_char_p++ = '.';
for (int i = exponent; i < 0; i++)
{
*actual_char_p++ = '0';
}
}
/* Add significant digits. */
for (int i = 1; i <= precision; i++)
{
digit = 0;
scale /= 10;
while (digits >= scale && scale > 0)
{
digits -= scale;
digit++;
}
*actual_char_p++ = (lit_utf8_byte_t) (digit + '0');
if (i == exponent && i != precision)
{
*actual_char_p++ = '.';
}
}
}
JERRY_ASSERT (actual_char_p - buff < buffer_size);
*actual_char_p = '\0';
ecma_string_t *str_p = ecma_new_ecma_string_from_utf8 (buff, (lit_utf8_size_t) (actual_char_p - buff));
ret_value = ecma_make_string_value (str_p);
MEM_FINALIZE_LOCAL_ARRAY (buff);
}
}
ECMA_OP_TO_NUMBER_FINALIZE (arg_num);
}
ECMA_FINALIZE (this_value);
return ret_value;
} /* ecma_builtin_number_prototype_object_to_precision */
/**
* The Number.prototype object's 'toExponential' routine
*
* See also:
* ECMA-262 v5, 15.7.4.6
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_number_prototype_object_to_exponential (ecma_value_t this_arg, /**< this argument */
ecma_value_t arg) /**< routine's argument */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
/* 1. */
ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);
ecma_number_t this_num = *ecma_get_number_from_value (this_value);
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);
/* 7. */
if (arg_num <= -1.0 || arg_num >= 21.0)
{
ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
}
else
{
/* 3. */
if (ecma_number_is_nan (this_num))
{
ecma_string_t *nan_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_NAN);
ret_value = ecma_make_string_value (nan_str_p);
}
else
{
bool is_negative = false;
/* 5. */
if (ecma_number_is_negative (this_num) && !ecma_number_is_zero (this_num))
{
is_negative = true;
this_num *= -1;
}
/* 6. */
if (ecma_number_is_infinity (this_num))
{
ecma_string_t *infinity_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_INFINITY_UL);
if (is_negative)
{
ecma_string_t *neg_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_MINUS_CHAR);
ecma_string_t *neg_inf_str_p = ecma_concat_ecma_strings (neg_str_p, infinity_str_p);
ecma_deref_ecma_string (infinity_str_p);
ecma_deref_ecma_string (neg_str_p);
ret_value = ecma_make_string_value (neg_inf_str_p);
}
else
{
ret_value = ecma_make_string_value (infinity_str_p);
}
}
else
{
uint64_t digits = 0;
int32_t num_digits = 0;
int32_t exponent = 1;
if (!ecma_number_is_zero (this_num))
{
/* Get the parameters of the number if non zero. */
ecma_number_to_decimal (this_num, &digits, &num_digits, &exponent);
}
int32_t frac_digits;
if (ecma_is_value_undefined (arg))
{
frac_digits = num_digits - 1;
}
else
{
frac_digits = ecma_number_to_int32 (arg_num);
}
digits = ecma_builtin_number_prototype_helper_round (digits, num_digits - frac_digits - 1);
/* frac_digits + 2 characters for number, 5 characters for exponent, 1 for \0. */
int buffer_size = frac_digits + 2 + 5 + 1;
if (is_negative)
{
/* +1 character for sign. */
buffer_size++;
}
MEM_DEFINE_LOCAL_ARRAY (buff, buffer_size, lit_utf8_byte_t);
int digit = 0;
uint64_t scale = 1;
/* Calculate the magnitude of the number. This is used to get the digits from left to right. */
while (scale <= digits)
{
scale *= 10;
}
lit_utf8_byte_t *actual_char_p = buff;
if (is_negative)
{
*actual_char_p++ = '-';
}
/* Add significant digits. */
for (int i = 0; i <= frac_digits; i++)
{
digit = 0;
scale /= 10;
while (digits >= scale && scale > 0)
{
digits -= scale;
digit++;
}
*actual_char_p = (lit_utf8_byte_t) (digit + '0');
actual_char_p++;
if (i == 0 && frac_digits != 0)
{
*actual_char_p++ = '.';
}
}
*actual_char_p++ = 'e';
exponent--;
if (exponent < 0)
{
exponent *= -1;
*actual_char_p++ = '-';
}
else
{
*actual_char_p++ = '+';
}
/* Get magnitude of exponent. */
int32_t scale_expt = 1;
while (scale_expt <= exponent)
{
scale_expt *= 10;
}
scale_expt /= 10;
/* Add exponent digits. */
if (exponent == 0)
{
*actual_char_p++ = '0';
}
else
{
while (scale_expt > 0)
{
digit = exponent / scale_expt;
exponent %= scale_expt;
*actual_char_p++ = (lit_utf8_byte_t) (digit + '0');
scale_expt /= 10;
}
}
JERRY_ASSERT (actual_char_p - buff < buffer_size);
*actual_char_p = '\0';
ecma_string_t *str = ecma_new_ecma_string_from_utf8 (buff, (lit_utf8_size_t) (actual_char_p - buff));
ret_value = ecma_make_string_value (str);
MEM_FINALIZE_LOCAL_ARRAY (buff);
}
}
}
ECMA_OP_TO_NUMBER_FINALIZE (arg_num);
ECMA_FINALIZE (this_value);
return ret_value;
} /* ecma_builtin_number_prototype_object_to_exponential */
/**
* The Number.prototype object's 'toFixed' routine
*
* See also:
* ECMA-262 v5, 15.7.4.5
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_number_prototype_object_to_fixed (ecma_value_t this_arg, /**< this argument */
ecma_value_t arg) /**< routine's argument */
{
ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);
ecma_number_t this_num = *ecma_get_number_from_value (this_value);
ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);
/* 2. */
if (arg_num <= -1 || arg_num >= 21)
{
ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));
}
else
{
/* 4. */
if (ecma_number_is_nan (this_num))
{
ecma_string_t *nan_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_NAN);
ret_value = ecma_make_string_value (nan_str_p);
}
else
{
bool is_negative = false;
/* 6. */
if (ecma_number_is_negative (this_num))
{
is_negative = true;
this_num *= -1;
}
/* We handle infinities separately. */
if (ecma_number_is_infinity (this_num))
{
ecma_string_t *infinity_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_INFINITY_UL);
if (is_negative)
{
ecma_string_t *neg_str_p = ecma_new_ecma_string_from_utf8 ((const lit_utf8_byte_t *) "-", 1);
ecma_string_t *neg_inf_str_p = ecma_concat_ecma_strings (neg_str_p, infinity_str_p);
ecma_deref_ecma_string (infinity_str_p);
ecma_deref_ecma_string (neg_str_p);
ret_value = ecma_make_string_value (neg_inf_str_p);
}
else
{
ret_value = ecma_make_string_value (infinity_str_p);
}
}
else
{
uint64_t digits = 0;
int32_t num_digits = 0;
int32_t exponent = 1;
/* 1. */
int32_t frac_digits = ecma_number_to_int32 (arg_num);
/* Get the parameters of the number if non-zero. */
if (!ecma_number_is_zero (this_num))
{
ecma_number_to_decimal (this_num, &digits, &num_digits, &exponent);
}
digits = ecma_builtin_number_prototype_helper_round (digits, num_digits - exponent - frac_digits);
/* 7. */
if (exponent > 21)
{
ret_value = ecma_builtin_number_prototype_object_to_string (this_arg, NULL, 0);
}
/* 8. */
else
{
/* Buffer that is used to construct the string. */
int buffer_size = (exponent > 0) ? exponent + frac_digits + 2 : frac_digits + 3;
if (is_negative)
{
buffer_size++;
}
JERRY_ASSERT (buffer_size > 0);
MEM_DEFINE_LOCAL_ARRAY (buff, buffer_size, lit_utf8_byte_t);
lit_utf8_byte_t *p = buff;
if (is_negative)
{
*p++ = '-';
}
int8_t digit = 0;
uint64_t s = 1;
/* Calculate the magnitude of the number. This is used to get the digits from left to right. */
while (s <= digits)
{
s *= 10;
}
if (exponent <= 0)
{
/* Add leading zeros. */
*p++ = '0';
if (frac_digits != 0)
{
*p++ = '.';
}
for (int i = 0; i < -exponent && i < frac_digits; i++)
{
*p++ = '0';
}
/* Add significant digits. */
for (int i = -exponent; i < frac_digits; i++)
{
digit = 0;
s /= 10;
while (digits >= s && s > 0)
{
digits -= s;
digit++;
}
*p = (lit_utf8_byte_t) ((lit_utf8_byte_t) digit + '0');
p++;
}
}
else
{
/* Add significant digits. */
for (int i = 0; i < exponent; i++)
{
digit = 0;
s /= 10;
while (digits >= s && s > 0)
{
digits -= s;
digit++;
}
*p = (lit_utf8_byte_t) ((lit_utf8_byte_t) digit + '0');
p++;
}
/* Add the decimal point after whole part. */
if (frac_digits != 0)
{
*p++ = '.';
}
/* Add neccessary fracion digits. */
for (int i = 0; i < frac_digits; i++)
{
digit = 0;
s /= 10;
while (digits >= s && s > 0)
{
digits -= s;
digit++;
}
*p = (lit_utf8_byte_t) ((lit_utf8_byte_t) digit + '0');
p++;
}
}
JERRY_ASSERT (p - buff < buffer_size);
/* String terminator. */
*p = 0;
ecma_string_t *str = ecma_new_ecma_string_from_utf8 (buff, (lit_utf8_size_t) (p - buff));
ret_value = ecma_make_string_value (str);
MEM_FINALIZE_LOCAL_ARRAY (buff);
}
}
}
}
ECMA_OP_TO_NUMBER_FINALIZE (arg_num);
ECMA_FINALIZE (this_value);
return ret_value;
} /* ecma_builtin_number_prototype_object_to_fixed */