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jerryscript/jerry-core/ecma/operations/ecma-conversion.c
Szilagyi Adam 183600dff2 Refactor ecma_op_same_value (#3486) 
JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
2020-01-06 14:33:46 +01:00

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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Implementation of ECMA-defined conversion routines
*/
#include <math.h>
#include "ecma-alloc.h"
#include "ecma-boolean-object.h"
#include "ecma-conversion.h"
#include "ecma-exceptions.h"
#include "ecma-function-object.h"
#include "ecma-gc.h"
#include "ecma-globals.h"
#include "ecma-helpers.h"
#include "ecma-number-object.h"
#include "ecma-objects.h"
#include "ecma-objects-general.h"
#include "ecma-string-object.h"
#include "ecma-symbol-object.h"
#include "ecma-try-catch-macro.h"
#include "jrt-libc-includes.h"
/** \addtogroup ecma ECMA
* @{
*
* \addtogroup ecmaconversion ECMA conversion routines
* @{
*/
/**
* CheckObjectCoercible operation.
*
* See also:
* ECMA-262 v5, 9.10
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_check_object_coercible (ecma_value_t value) /**< ecma value */
{
ecma_check_value_type_is_spec_defined (value);
if (ecma_is_value_undefined (value)
|| ecma_is_value_null (value))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Argument cannot be converted to an object."));
}
else
{
return ECMA_VALUE_EMPTY;
}
} /* ecma_op_check_object_coercible */
/**
* 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 */
{
if (x == y)
{
return true;
}
ecma_type_t type_of_x = ecma_get_value_type_field (x);
if (type_of_x != ecma_get_value_type_field (y)
|| type_of_x == ECMA_TYPE_DIRECT)
{
return false;
}
if (ecma_is_value_number (x))
{
ecma_number_t x_num = ecma_get_number_from_value (x);
ecma_number_t y_num = ecma_get_number_from_value (y);
if (ecma_number_is_nan (x_num) == ecma_number_is_nan (y_num))
{
return true;
}
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;
}
return (x_num == y_num);
}
if (ecma_is_value_string (x))
{
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);
}
JERRY_ASSERT (ecma_is_value_object (x) || ECMA_ASSERT_VALUE_IS_SYMBOL (x));
return false;
} /* ecma_op_same_value */
#if ENABLED (JERRY_ES2015_BUILTIN_MAP)
/**
* SameValueZero operation.
*
* See also:
* ECMA-262 v6, 7.2.10
*
* @return true - if the value are same according to ECMA-defined SameValueZero algorithm,
* false - otherwise
*/
bool
ecma_op_same_value_zero (ecma_value_t x, /**< ecma value */
ecma_value_t y) /**< ecma value */
{
if (ecma_is_value_number (x) && ecma_is_value_number (y))
{
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);
}
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 true;
}
return (x_num == y_num);
}
return ecma_op_same_value (x, y);
} /* ecma_op_same_value_zero */
#endif /* ENABLED (JERRY_ES2015_BUILTIN_MAP) */
/**
* ToPrimitive operation.
*
* See also:
* ECMA-262 v5, 9.1
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_to_primitive (ecma_value_t value, /**< ecma value */
ecma_preferred_type_hint_t preferred_type) /**< preferred type hint */
{
ecma_check_value_type_is_spec_defined (value);
if (ecma_is_value_object (value))
{
ecma_object_t *obj_p = ecma_get_object_from_value (value);
return ecma_op_object_default_value (obj_p, preferred_type);
}
else
{
return ecma_copy_value (value);
}
} /* ecma_op_to_primitive */
/**
* ToBoolean operation. Cannot throw an exception.
*
* See also:
* ECMA-262 v5, 9.2
*
* @return true - if the logical value is true
* false - otherwise
*/
bool
ecma_op_to_boolean (ecma_value_t value) /**< ecma value */
{
ecma_check_value_type_is_spec_defined (value);
if (ecma_is_value_simple (value))
{
JERRY_ASSERT (ecma_is_value_boolean (value)
|| ecma_is_value_undefined (value)
|| ecma_is_value_null (value));
return ecma_is_value_true (value);
}
if (ecma_is_value_integer_number (value))
{
return (value != ecma_make_integer_value (0));
}
if (ecma_is_value_float_number (value))
{
ecma_number_t num = ecma_get_float_from_value (value);
return (!ecma_number_is_nan (num) && !ecma_number_is_zero (num));
}
if (ecma_is_value_string (value))
{
ecma_string_t *str_p = ecma_get_string_from_value (value);
return !ecma_string_is_empty (str_p);
}
JERRY_ASSERT (ecma_is_value_object (value) || ECMA_ASSERT_VALUE_IS_SYMBOL (value));
return true;
} /* ecma_op_to_boolean */
/**
* ToNumber operation.
*
* See also:
* ECMA-262 v5, 9.3
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_to_number (ecma_value_t value) /**< ecma value */
{
ecma_check_value_type_is_spec_defined (value);
if (ecma_is_value_integer_number (value))
{
return value;
}
if (ecma_is_value_float_number (value))
{
return ecma_copy_value (value);
}
if (ecma_is_value_string (value))
{
ecma_string_t *str_p = ecma_get_string_from_value (value);
return ecma_make_number_value (ecma_string_to_number (str_p));
}
#if ENABLED (JERRY_ES2015)
if (ecma_is_value_symbol (value))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Cannot convert a Symbol value to a number."));
}
#endif /* ENABLED (JERRY_ES2015) */
if (ecma_is_value_object (value))
{
ecma_value_t primitive_value = ecma_op_to_primitive (value, ECMA_PREFERRED_TYPE_NUMBER);
if (ECMA_IS_VALUE_ERROR (primitive_value))
{
return primitive_value;
}
ecma_value_t ret_value = ecma_op_to_number (primitive_value);
ecma_fast_free_value (primitive_value);
return ret_value;
}
if (ecma_is_value_undefined (value))
{
return ecma_make_nan_value ();
}
ecma_integer_value_t num = 0;
if (ecma_is_value_null (value))
{
num = 0;
}
else
{
JERRY_ASSERT (ecma_is_value_boolean (value));
num = ecma_is_value_true (value) ? 1 : 0;
}
return ecma_make_integer_value (num);
} /* ecma_op_to_number */
/**
* Helper to get the number contained in an ecma value.
*
* See also:
* ECMA-262 v5, 9.3
*
* @return ECMA_VALUE_EMPTY if successful
* conversion error otherwise
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_get_number (ecma_value_t value, /**< ecma value*/
ecma_number_t *number_p) /**< [out] ecma number */
{
if (ecma_is_value_integer_number (value))
{
*number_p = ecma_get_integer_from_value (value);
return ECMA_VALUE_EMPTY;
}
if (ecma_is_value_float_number (value))
{
*number_p = ecma_get_float_from_value (value);
return ECMA_VALUE_EMPTY;
}
if (ecma_is_value_string (value))
{
ecma_string_t *str_p = ecma_get_string_from_value (value);
*number_p = ecma_string_to_number (str_p);
return ECMA_VALUE_EMPTY;
}
if (ecma_is_value_object (value))
{
ecma_value_t primitive_value = ecma_op_to_primitive (value, ECMA_PREFERRED_TYPE_NUMBER);
if (ECMA_IS_VALUE_ERROR (primitive_value))
{
return primitive_value;
}
ecma_value_t ret_value = ecma_get_number (primitive_value, number_p);
ecma_fast_free_value (primitive_value);
return ret_value;
}
if (ecma_is_value_undefined (value))
{
*number_p = ecma_number_make_nan ();
return ECMA_VALUE_EMPTY;
}
if (ecma_is_value_null (value))
{
*number_p = 0;
return ECMA_VALUE_EMPTY;
}
#if ENABLED (JERRY_ES2015)
if (ecma_is_value_symbol (value))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Cannot convert a Symbol value to a number."));
}
#endif /* ENABLED (JERRY_ES2015) */
JERRY_ASSERT (ecma_is_value_boolean (value));
*number_p = ecma_is_value_true (value) ? 1 : 0;
return ECMA_VALUE_EMPTY;
} /* ecma_get_number */
/**
* ToString operation.
*
* See also:
* ECMA-262 v5, 9.8
*
* @return NULL - if the conversion fails
* pointer to the string descriptor - otherwise
*/
ecma_string_t *
ecma_op_to_string (ecma_value_t value) /**< ecma value */
{
ecma_check_value_type_is_spec_defined (value);
if (JERRY_UNLIKELY (ecma_is_value_object (value)))
{
ecma_value_t prim_value = ecma_op_to_primitive (value, ECMA_PREFERRED_TYPE_STRING);
if (ECMA_IS_VALUE_ERROR (prim_value))
{
return NULL;
}
ecma_string_t *ret_string_p = ecma_op_to_string (prim_value);
ecma_free_value (prim_value);
return ret_string_p;
}
if (ecma_is_value_string (value))
{
ecma_string_t *res_p = ecma_get_string_from_value (value);
ecma_ref_ecma_string (res_p);
return res_p;
}
else if (ecma_is_value_integer_number (value))
{
ecma_integer_value_t num = ecma_get_integer_from_value (value);
if (num < 0)
{
return ecma_new_ecma_string_from_number ((ecma_number_t) num);
}
else
{
return ecma_new_ecma_string_from_uint32 ((uint32_t) num);
}
}
else if (ecma_is_value_float_number (value))
{
ecma_number_t num = ecma_get_float_from_value (value);
return ecma_new_ecma_string_from_number (num);
}
else if (ecma_is_value_undefined (value))
{
return ecma_get_magic_string (LIT_MAGIC_STRING_UNDEFINED);
}
else if (ecma_is_value_null (value))
{
return ecma_get_magic_string (LIT_MAGIC_STRING_NULL);
}
#if ENABLED (JERRY_ES2015)
else if (ecma_is_value_symbol (value))
{
ecma_raise_type_error (ECMA_ERR_MSG ("Cannot convert a Symbol value to a string."));
return NULL;
}
#endif /* ENABLED (JERRY_ES2015) */
JERRY_ASSERT (ecma_is_value_boolean (value));
if (ecma_is_value_true (value))
{
return ecma_get_magic_string (LIT_MAGIC_STRING_TRUE);
}
return ecma_get_magic_string (LIT_MAGIC_STRING_FALSE);
} /* ecma_op_to_string */
/**
* ToPropertyName operation.
*
* @return NULL - if the conversion fails
* ecma-string - otherwise
*/
ecma_string_t *
ecma_op_to_prop_name (ecma_value_t value) /**< ecma value */
{
ecma_check_value_type_is_spec_defined (value);
#if ENABLED (JERRY_ES2015)
if (ecma_is_value_symbol (value))
{
ecma_string_t *symbol_p = ecma_get_symbol_from_value (value);
ecma_ref_ecma_string (symbol_p);
return symbol_p;
}
#endif /* ENABLED (JERRY_ES2015) */
return ecma_op_to_string (value);
} /* ecma_op_to_prop_name */
/**
* ToObject operation.
*
* See also:
* ECMA-262 v5, 9.9
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_to_object (ecma_value_t value) /**< ecma value */
{
ecma_check_value_type_is_spec_defined (value);
if (ecma_is_value_number (value))
{
return ecma_op_create_number_object (value);
}
else if (ecma_is_value_string (value))
{
return ecma_op_create_string_object (&value, 1);
}
else if (ecma_is_value_object (value))
{
return ecma_copy_value (value);
}
#if ENABLED (JERRY_ES2015)
else if (ecma_is_value_symbol (value))
{
return ecma_op_create_symbol_object (value);
}
#endif /* ENABLED (JERRY_ES2015) */
else
{
if (ecma_is_value_undefined (value)
|| ecma_is_value_null (value))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Argument cannot be converted to an object."));
}
else
{
JERRY_ASSERT (ecma_is_value_boolean (value));
return ecma_op_create_boolean_object (value);
}
}
} /* ecma_op_to_object */
/**
* FromPropertyDescriptor operation.
*
* See also:
* ECMA-262 v5, 8.10.4
*
* @return constructed object
*/
ecma_object_t *
ecma_op_from_property_descriptor (const ecma_property_descriptor_t *src_prop_desc_p) /**< property descriptor */
{
/* 2. */
ecma_object_t *obj_p = ecma_op_create_object_object_noarg ();
ecma_value_t completion;
ecma_property_descriptor_t prop_desc = ecma_make_empty_property_descriptor ();
{
prop_desc.flags = (ECMA_PROP_IS_VALUE_DEFINED
| ECMA_PROP_IS_WRITABLE_DEFINED
| ECMA_PROP_IS_WRITABLE
| ECMA_PROP_IS_ENUMERABLE_DEFINED
| ECMA_PROP_IS_ENUMERABLE
| ECMA_PROP_IS_CONFIGURABLE_DEFINED
| ECMA_PROP_IS_CONFIGURABLE);
}
/* 3. */
if (src_prop_desc_p->flags & (ECMA_PROP_IS_VALUE_DEFINED | ECMA_PROP_IS_WRITABLE_DEFINED))
{
JERRY_ASSERT ((prop_desc.flags & (ECMA_PROP_IS_VALUE_DEFINED | ECMA_PROP_IS_WRITABLE_DEFINED))
== (ECMA_PROP_IS_VALUE_DEFINED | ECMA_PROP_IS_WRITABLE_DEFINED));
/* a. */
prop_desc.value = src_prop_desc_p->value;
completion = ecma_op_object_define_own_property (obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_VALUE),
&prop_desc);
JERRY_ASSERT (ecma_is_value_true (completion));
/* b. */
prop_desc.value = ecma_make_boolean_value (src_prop_desc_p->flags & ECMA_PROP_IS_WRITABLE);
completion = ecma_op_object_define_own_property (obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_WRITABLE),
&prop_desc);
JERRY_ASSERT (ecma_is_value_true (completion));
}
else
{
/* 4. */
JERRY_ASSERT (src_prop_desc_p->flags & (ECMA_PROP_IS_GET_DEFINED | ECMA_PROP_IS_SET_DEFINED));
/* a. */
if (src_prop_desc_p->get_p == NULL)
{
prop_desc.value = ECMA_VALUE_UNDEFINED;
}
else
{
prop_desc.value = ecma_make_object_value (src_prop_desc_p->get_p);
}
completion = ecma_op_object_define_own_property (obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_GET),
&prop_desc);
JERRY_ASSERT (ecma_is_value_true (completion));
/* b. */
if (src_prop_desc_p->set_p == NULL)
{
prop_desc.value = ECMA_VALUE_UNDEFINED;
}
else
{
prop_desc.value = ecma_make_object_value (src_prop_desc_p->set_p);
}
completion = ecma_op_object_define_own_property (obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_SET),
&prop_desc);
JERRY_ASSERT (ecma_is_value_true (completion));
}
prop_desc.value = ecma_make_boolean_value (src_prop_desc_p->flags & ECMA_PROP_IS_ENUMERABLE);
completion = ecma_op_object_define_own_property (obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_ENUMERABLE),
&prop_desc);
JERRY_ASSERT (ecma_is_value_true (completion));
prop_desc.value = ecma_make_boolean_value (src_prop_desc_p->flags & ECMA_PROP_IS_CONFIGURABLE);
completion = ecma_op_object_define_own_property (obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_CONFIGURABLE),
&prop_desc);
JERRY_ASSERT (ecma_is_value_true (completion));
return obj_p;
} /* ecma_op_from_property_descriptor */
/**
* ToPropertyDescriptor operation.
*
* See also:
* ECMA-262 v5, 8.10.5
*
* @return ecma value
* Returned value must be freed with ecma_free_value
*/
ecma_value_t
ecma_op_to_property_descriptor (ecma_value_t obj_value, /**< object value */
ecma_property_descriptor_t *out_prop_desc_p) /**< [out] filled property descriptor
if return value is normal
empty completion value */
{
ecma_value_t ret_value = ECMA_VALUE_EMPTY;
/* 1. */
if (!ecma_is_value_object (obj_value))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Expected an object."));
}
else
{
ecma_object_t *obj_p = ecma_get_object_from_value (obj_value);
/* 2. */
ecma_property_descriptor_t prop_desc = ecma_make_empty_property_descriptor ();
/* 3. */
ECMA_TRY_CATCH (enumerable_prop_value,
ecma_op_object_find (obj_p, ecma_get_magic_string (LIT_MAGIC_STRING_ENUMERABLE)),
ret_value);
if (ecma_is_value_found (enumerable_prop_value))
{
uint32_t is_enumerable = (ecma_op_to_boolean (enumerable_prop_value) ? ECMA_PROP_IS_ENUMERABLE
: ECMA_PROP_NO_OPTS);
prop_desc.flags |= (uint16_t) (ECMA_PROP_IS_ENUMERABLE_DEFINED | is_enumerable);
}
ECMA_FINALIZE (enumerable_prop_value);
if (!ECMA_IS_VALUE_ERROR (ret_value))
{
JERRY_ASSERT (ecma_is_value_empty (ret_value));
/* 4. */
ECMA_TRY_CATCH (configurable_prop_value,
ecma_op_object_find (obj_p, ecma_get_magic_string (LIT_MAGIC_STRING_CONFIGURABLE)),
ret_value);
if (ecma_is_value_found (configurable_prop_value))
{
uint32_t is_configurable = (ecma_op_to_boolean (configurable_prop_value) ? ECMA_PROP_IS_CONFIGURABLE
: ECMA_PROP_NO_OPTS);
prop_desc.flags |= (uint16_t) (ECMA_PROP_IS_CONFIGURABLE_DEFINED | is_configurable);
}
ECMA_FINALIZE (configurable_prop_value);
}
if (!ECMA_IS_VALUE_ERROR (ret_value))
{
JERRY_ASSERT (ecma_is_value_empty (ret_value));
/* 5. */
ECMA_TRY_CATCH (value_prop_value,
ecma_op_object_find (obj_p, ecma_get_magic_string (LIT_MAGIC_STRING_VALUE)),
ret_value);
if (ecma_is_value_found (value_prop_value))
{
prop_desc.flags |= ECMA_PROP_IS_VALUE_DEFINED;
prop_desc.value = ecma_copy_value (value_prop_value);
}
ECMA_FINALIZE (value_prop_value);
}
if (!ECMA_IS_VALUE_ERROR (ret_value))
{
JERRY_ASSERT (ecma_is_value_empty (ret_value));
/* 6. */
ECMA_TRY_CATCH (writable_prop_value,
ecma_op_object_find (obj_p, ecma_get_magic_string (LIT_MAGIC_STRING_WRITABLE)),
ret_value);
if (ecma_is_value_found (writable_prop_value))
{
uint32_t is_writable = (ecma_op_to_boolean (writable_prop_value) ? ECMA_PROP_IS_WRITABLE
: ECMA_PROP_NO_OPTS);
prop_desc.flags |= (uint16_t) (ECMA_PROP_IS_WRITABLE_DEFINED | is_writable);
}
ECMA_FINALIZE (writable_prop_value);
}
if (!ECMA_IS_VALUE_ERROR (ret_value))
{
JERRY_ASSERT (ecma_is_value_empty (ret_value));
/* 7. */
ECMA_TRY_CATCH (get_prop_value,
ecma_op_object_find (obj_p, ecma_get_magic_string (LIT_MAGIC_STRING_GET)),
ret_value);
if (ecma_is_value_found (get_prop_value))
{
if (!ecma_op_is_callable (get_prop_value)
&& !ecma_is_value_undefined (get_prop_value))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Expected a function."));
}
else
{
prop_desc.flags |= ECMA_PROP_IS_GET_DEFINED;
if (ecma_is_value_undefined (get_prop_value))
{
prop_desc.get_p = NULL;
}
else
{
JERRY_ASSERT (ecma_is_value_object (get_prop_value));
ecma_object_t *get_p = ecma_get_object_from_value (get_prop_value);
ecma_ref_object (get_p);
prop_desc.get_p = get_p;
}
}
}
ECMA_FINALIZE (get_prop_value);
}
if (!ECMA_IS_VALUE_ERROR (ret_value))
{
JERRY_ASSERT (ecma_is_value_empty (ret_value));
/* 8. */
ECMA_TRY_CATCH (set_prop_value,
ecma_op_object_find (obj_p, ecma_get_magic_string (LIT_MAGIC_STRING_SET)),
ret_value);
if (ecma_is_value_found (set_prop_value))
{
if (!ecma_op_is_callable (set_prop_value)
&& !ecma_is_value_undefined (set_prop_value))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Expected a function."));
}
else
{
prop_desc.flags |= ECMA_PROP_IS_SET_DEFINED;
if (ecma_is_value_undefined (set_prop_value))
{
prop_desc.set_p = NULL;
}
else
{
JERRY_ASSERT (ecma_is_value_object (set_prop_value));
ecma_object_t *set_p = ecma_get_object_from_value (set_prop_value);
ecma_ref_object (set_p);
prop_desc.set_p = set_p;
}
}
}
ECMA_FINALIZE (set_prop_value);
}
if (!ECMA_IS_VALUE_ERROR (ret_value))
{
JERRY_ASSERT (ecma_is_value_empty (ret_value));
/* 9. */
if ((prop_desc.flags & (ECMA_PROP_IS_VALUE_DEFINED | ECMA_PROP_IS_WRITABLE_DEFINED))
&& (prop_desc.flags & (ECMA_PROP_IS_GET_DEFINED | ECMA_PROP_IS_SET_DEFINED)))
{
ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Accessors cannot be writable."));
}
}
if (!ECMA_IS_VALUE_ERROR (ret_value))
{
JERRY_ASSERT (ecma_is_value_empty (ret_value));
}
else
{
ecma_free_property_descriptor (&prop_desc);
}
*out_prop_desc_p = prop_desc;
}
return ret_value;
} /* ecma_op_to_property_descriptor */
/**
* ToInteger operation.
*
* See also:
* ECMA-262 v5, 9.4
* ECMA-262 v6, 7.1.4
*
* @return ECMA_VALUE_EMPTY if successful
* conversion error otherwise
*/
ecma_value_t
ecma_op_to_integer (ecma_value_t value, /**< ecma value*/
ecma_number_t *number_p) /**< [out] ecma number */
{
if (ECMA_IS_VALUE_ERROR (value))
{
return value;
}
/* 1 */
ecma_value_t to_number = ecma_get_number (value, number_p);
/* 2 */
if (ECMA_IS_VALUE_ERROR (to_number))
{
return to_number;
}
ecma_number_t number = *number_p;
/* 3 */
if (ecma_number_is_nan (number))
{
*number_p = ECMA_NUMBER_ZERO;
return ECMA_VALUE_EMPTY;
}
/* 4 */
if (ecma_number_is_zero (number) || ecma_number_is_infinity (number))
{
return ECMA_VALUE_EMPTY;
}
ecma_number_t floor_fabs = floor (fabs (number));
/* 5 */
*number_p = ecma_number_is_negative (number) ? -floor_fabs : floor_fabs;
return ECMA_VALUE_EMPTY;
} /* ecma_op_to_integer */
/**
* ToLength operation.
*
* See also:
* ECMA-262 v6, 7.1.15
*
* @return ECMA_VALUE_EMPTY if successful
* conversion error otherwise
*/
ecma_value_t
ecma_op_to_length (ecma_value_t value, /**< ecma value*/
uint32_t *length) /**< [out] ecma number */
{
/* 1 */
if (ECMA_IS_VALUE_ERROR (value))
{
return value;
}
#if ENABLED (JERRY_ES2015)
/* 2 */
ecma_number_t num;
ecma_value_t length_num = ecma_op_to_integer (value, &num);
/* 3 */
if (ECMA_IS_VALUE_ERROR (length_num))
{
return length_num;
}
/* 4 */
if (num <= 0.0f)
{
*length = 0;
return ECMA_VALUE_EMPTY;
}
/* 5 */
if (num >= (ecma_number_t) UINT32_MAX)
{
*length = UINT32_MAX;
return ECMA_VALUE_EMPTY;
}
/* 6 */
*length = (uint32_t) num;
return ECMA_VALUE_EMPTY;
#else /* !ENABLED (JERRY_ES2015) */
/* In the case of ES5, ToLength(ES6) operation is the same as ToUint32(ES5) */
ecma_number_t num;
ecma_value_t to_number = ecma_get_number (value, &num);
/* 2 */
if (ECMA_IS_VALUE_ERROR (to_number))
{
return to_number;
}
*length = ecma_number_to_uint32 (num);
return ECMA_VALUE_EMPTY;
#endif /* ENABLED (JERRY_ES2015) */
} /* ecma_op_to_length */
/**
* @}
* @}
*/
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