/* 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.
 */

#include "ecma-alloc.h"
#include "ecma-gc.h"
#include "ecma-globals.h"
#include "ecma-helpers.h"
#include "ecma-lcache.h"
#include "ecma-property-hashmap.h"
#include "jcontext.h"
#include "jrt-bit-fields.h"
#include "byte-code.h"
#include "re-compiler.h"
#include "ecma-builtins.h"

#ifdef JERRY_DEBUGGER
#include "debugger.h"
#endif /* JERRY_DEBUGGER */

/** \addtogroup ecma ECMA
 * @{
 *
 * \addtogroup ecmahelpers Helpers for operations with ECMA data types
 * @{
 */

JERRY_STATIC_ASSERT (ECMA_PROPERTY_TYPE_MASK >= ECMA_PROPERTY_TYPE__MAX,
                     ecma_property_types_must_be_lower_than_the_container_mask);

JERRY_STATIC_ASSERT (ECMA_OBJECT_TYPE_MASK >= ECMA_OBJECT_TYPE__MAX - 1,
                     ecma_object_types_must_be_lower_than_the_container_mask);

JERRY_STATIC_ASSERT (ECMA_OBJECT_TYPE_MASK >= ECMA_LEXICAL_ENVIRONMENT_TYPE__MAX,
                     ecma_lexical_environment_types_must_be_lower_than_the_container_mask);

JERRY_STATIC_ASSERT (ECMA_OBJECT_TYPE_MASK + 1 == ECMA_OBJECT_FLAG_BUILT_IN_OR_LEXICAL_ENV,
                     ecma_built_in_flag_must_follow_the_object_type);

JERRY_STATIC_ASSERT (ECMA_OBJECT_FLAG_EXTENSIBLE == (ECMA_OBJECT_FLAG_BUILT_IN_OR_LEXICAL_ENV << 1),
                     ecma_extensible_flag_must_follow_the_built_in_flag);

JERRY_STATIC_ASSERT (ECMA_OBJECT_REF_ONE == (ECMA_OBJECT_FLAG_EXTENSIBLE << 1),
                     ecma_object_ref_one_must_follow_the_extensible_flag);

JERRY_STATIC_ASSERT ((ECMA_OBJECT_MAX_REF | (ECMA_OBJECT_REF_ONE - 1)) == UINT16_MAX,
                     ecma_object_max_ref_does_not_fill_the_remaining_bits);

JERRY_STATIC_ASSERT (ECMA_PROPERTY_TYPE_DELETED == (ECMA_DIRECT_STRING_MAGIC << ECMA_PROPERTY_NAME_TYPE_SHIFT),
                     ecma_property_type_deleted_must_have_magic_string_name_type);

JERRY_STATIC_ASSERT (ECMA_PROPERTY_DELETED_NAME >= LIT_MAGIC_STRING__COUNT,
                     ecma_property_deleted_name_must_not_be_valid_maigc_string_id);

/**
 * Create an object with specified prototype object
 * (or NULL prototype if there is not prototype for the object)
 * and value of 'Extensible' attribute.
 *
 * Reference counter's value will be set to one.
 *
 * @return pointer to the object's descriptor
 */
ecma_object_t *
ecma_create_object (ecma_object_t *prototype_object_p, /**< pointer to prototybe of the object (or NULL) */
                    size_t ext_object_size, /**< size of extended objects */
                    ecma_object_type_t type) /**< object type */
{
  ecma_object_t *new_object_p;

  if (ext_object_size > 0)
  {
    new_object_p = (ecma_object_t *) ecma_alloc_extended_object (ext_object_size);
  }
  else
  {
    new_object_p = ecma_alloc_object ();
  }

  new_object_p->type_flags_refs = (uint16_t) (type | ECMA_OBJECT_FLAG_EXTENSIBLE);

  ecma_init_gc_info (new_object_p);

  new_object_p->property_list_or_bound_object_cp = JMEM_CP_NULL;

  ECMA_SET_POINTER (new_object_p->prototype_or_outer_reference_cp,
                    prototype_object_p);

  return new_object_p;
} /* ecma_create_object */

/**
 * Create a declarative lexical environment with specified outer lexical environment
 * (or NULL if the environment is not nested).
 *
 * See also: ECMA-262 v5, 10.2.1.1
 *
 * Reference counter's value will be set to one.
 *
 * @return pointer to the descriptor of lexical environment
 */
ecma_object_t *
ecma_create_decl_lex_env (ecma_object_t *outer_lexical_environment_p) /**< outer lexical environment */
{
  ecma_object_t *new_lexical_environment_p = ecma_alloc_object ();

  uint16_t type = ECMA_OBJECT_FLAG_BUILT_IN_OR_LEXICAL_ENV | ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE;
  new_lexical_environment_p->type_flags_refs = type;

  ecma_init_gc_info (new_lexical_environment_p);

  new_lexical_environment_p->property_list_or_bound_object_cp = JMEM_CP_NULL;

  ECMA_SET_POINTER (new_lexical_environment_p->prototype_or_outer_reference_cp,
                    outer_lexical_environment_p);

  return new_lexical_environment_p;
} /* ecma_create_decl_lex_env */

/**
 * Create a object lexical environment with specified outer lexical environment
 * (or NULL if the environment is not nested), binding object and provideThis flag.
 *
 * See also: ECMA-262 v5, 10.2.1.2
 *
 * Reference counter's value will be set to one.
 *
 * @return pointer to the descriptor of lexical environment
 */
ecma_object_t *
ecma_create_object_lex_env (ecma_object_t *outer_lexical_environment_p, /**< outer lexical environment */
                            ecma_object_t *binding_obj_p) /**< binding object */
{
  JERRY_ASSERT (binding_obj_p != NULL
                && !ecma_is_lexical_environment (binding_obj_p));

  ecma_object_t *new_lexical_environment_p = ecma_alloc_object ();

  uint16_t type = ECMA_OBJECT_FLAG_BUILT_IN_OR_LEXICAL_ENV | ECMA_LEXICAL_ENVIRONMENT_THIS_OBJECT_BOUND;

  new_lexical_environment_p->type_flags_refs = type;

  ecma_init_gc_info (new_lexical_environment_p);

  ECMA_SET_NON_NULL_POINTER (new_lexical_environment_p->property_list_or_bound_object_cp,
                             binding_obj_p);

  ECMA_SET_POINTER (new_lexical_environment_p->prototype_or_outer_reference_cp,
                    outer_lexical_environment_p);

  return new_lexical_environment_p;
} /* ecma_create_object_lex_env */

/**
 * Check if the object is lexical environment.
 *
 * @return true  - if object is a lexical environment
 *         false - otherwise
 */
inline bool JERRY_ATTR_PURE
ecma_is_lexical_environment (const ecma_object_t *object_p) /**< object or lexical environment */
{
  JERRY_ASSERT (object_p != NULL);

  uint32_t full_type = object_p->type_flags_refs & (ECMA_OBJECT_FLAG_BUILT_IN_OR_LEXICAL_ENV | ECMA_OBJECT_TYPE_MASK);

  return full_type >= (ECMA_OBJECT_FLAG_BUILT_IN_OR_LEXICAL_ENV | ECMA_LEXICAL_ENVIRONMENT_TYPE_START);
} /* ecma_is_lexical_environment */

/**
 * Get value of [[Extensible]] object's internal property.
 *
 * @return true  - if object is extensible
 *         false - otherwise
 */
inline bool JERRY_ATTR_PURE
ecma_get_object_extensible (const ecma_object_t *object_p) /**< object */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (!ecma_is_lexical_environment (object_p));

  return (object_p->type_flags_refs & ECMA_OBJECT_FLAG_EXTENSIBLE) != 0;
} /* ecma_get_object_extensible */

/**
 * Set value of [[Extensible]] object's internal property.
 */
inline void
ecma_set_object_extensible (ecma_object_t *object_p, /**< object */
                            bool is_extensible) /**< value of [[Extensible]] */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (!ecma_is_lexical_environment (object_p));

  if (is_extensible)
  {
    object_p->type_flags_refs = (uint16_t) (object_p->type_flags_refs | ECMA_OBJECT_FLAG_EXTENSIBLE);
  }
  else
  {
    object_p->type_flags_refs = (uint16_t) (object_p->type_flags_refs & ~ECMA_OBJECT_FLAG_EXTENSIBLE);
  }
} /* ecma_set_object_extensible */

/**
 * Get object's internal implementation-defined type.
 *
 * @return type of the object (ecma_object_type_t)
 */
inline ecma_object_type_t JERRY_ATTR_PURE
ecma_get_object_type (const ecma_object_t *object_p) /**< object */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (!ecma_is_lexical_environment (object_p));

  return (ecma_object_type_t) (object_p->type_flags_refs & ECMA_OBJECT_TYPE_MASK);
} /* ecma_get_object_type */

/**
 * Get object's prototype.
 *
 * @return pointer to the prototype object
 *         NULL if there is no prototype
 */
inline ecma_object_t *JERRY_ATTR_PURE
ecma_get_object_prototype (const ecma_object_t *object_p) /**< object */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (!ecma_is_lexical_environment (object_p));

  return ECMA_GET_POINTER (ecma_object_t,
                           object_p->prototype_or_outer_reference_cp);
} /* ecma_get_object_prototype */

/**
 * Check if the object is a built-in object
 *
 * @return true  - if object is a built-in object
 *         false - otherwise
 */
inline bool JERRY_ATTR_PURE
ecma_get_object_is_builtin (const ecma_object_t *object_p) /**< object */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (!ecma_is_lexical_environment (object_p));

  return (object_p->type_flags_refs & ECMA_OBJECT_FLAG_BUILT_IN_OR_LEXICAL_ENV) != 0;
} /* ecma_get_object_is_builtin */

/**
 * Set flag indicating whether the object is a built-in object
 */
inline void
ecma_set_object_is_builtin (ecma_object_t *object_p) /**< object */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (!(object_p->type_flags_refs & ECMA_OBJECT_FLAG_BUILT_IN_OR_LEXICAL_ENV));
  JERRY_ASSERT ((object_p->type_flags_refs & ECMA_OBJECT_TYPE_MASK) < ECMA_LEXICAL_ENVIRONMENT_TYPE_START);

  object_p->type_flags_refs = (uint16_t) (object_p->type_flags_refs | ECMA_OBJECT_FLAG_BUILT_IN_OR_LEXICAL_ENV);
} /* ecma_set_object_is_builtin */

/**
 * Get the built-in ID of the object.
 * If the object is not builtin, return ECMA_BUILTIN_ID__COUNT
 *
 * @return the ID of the built-in
 */
inline uint8_t
ecma_get_object_builtin_id (ecma_object_t *object_p) /**< object */
{
  if (!ecma_get_object_is_builtin (object_p))
  {
    return ECMA_BUILTIN_ID__COUNT;
  }

  ecma_built_in_props_t *built_in_props_p;
  ecma_object_type_t object_type = ecma_get_object_type (object_p);

  if (object_type == ECMA_OBJECT_TYPE_CLASS || object_type == ECMA_OBJECT_TYPE_ARRAY)
  {
    built_in_props_p = &((ecma_extended_built_in_object_t *) object_p)->built_in;
  }
  else
  {
    built_in_props_p = &((ecma_extended_object_t *) object_p)->u.built_in;
  }

  return built_in_props_p->id;
} /* ecma_get_object_builtin_id */

/**
 * Get type of lexical environment.
 *
 * @return type of the lexical environment (ecma_lexical_environment_type_t)
 */
inline ecma_lexical_environment_type_t JERRY_ATTR_PURE
ecma_get_lex_env_type (const ecma_object_t *object_p) /**< lexical environment */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (ecma_is_lexical_environment (object_p));

  return (ecma_lexical_environment_type_t) (object_p->type_flags_refs & ECMA_OBJECT_TYPE_MASK);
} /* ecma_get_lex_env_type */

/**
 * Get outer reference of lexical environment.
 *
 * @return pointer to the outer reference
 */
inline ecma_object_t *JERRY_ATTR_PURE
ecma_get_lex_env_outer_reference (const ecma_object_t *object_p) /**< lexical environment */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (ecma_is_lexical_environment (object_p));

  return ECMA_GET_POINTER (ecma_object_t,
                           object_p->prototype_or_outer_reference_cp);
} /* ecma_get_lex_env_outer_reference */

/**
 * Get object's/lexical environment's property list.
 *
 * See also:
 *          ecma_op_object_get_property_names
 *
 * @return pointer to the head of the property list
 */
inline ecma_property_header_t *JERRY_ATTR_PURE
ecma_get_property_list (const ecma_object_t *object_p) /**< object or lexical environment */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (!ecma_is_lexical_environment (object_p)
                || ecma_get_lex_env_type (object_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE);

  return ECMA_GET_POINTER (ecma_property_header_t,
                           object_p->property_list_or_bound_object_cp);
} /* ecma_get_property_list */

/**
 * Get lexical environment's bound object.
 *
 * @return pointer to ecma object
 */
inline ecma_object_t *JERRY_ATTR_PURE
ecma_get_lex_env_binding_object (const ecma_object_t *object_p) /**< object-bound lexical environment */
{
  JERRY_ASSERT (object_p != NULL);
  JERRY_ASSERT (ecma_is_lexical_environment (object_p));
  JERRY_ASSERT (ecma_get_lex_env_type (object_p) == ECMA_LEXICAL_ENVIRONMENT_THIS_OBJECT_BOUND);

  return ECMA_GET_NON_NULL_POINTER (ecma_object_t,
                                    object_p->property_list_or_bound_object_cp);
} /* ecma_get_lex_env_binding_object */

/**
 * Create a property in an object and link it into
 * the object's properties' linked-list (at start of the list).
 *
 * @return pointer to the newly created property value
 */
static ecma_property_value_t *
ecma_create_property (ecma_object_t *object_p, /**< the object */
                      ecma_string_t *name_p, /**< property name */
                      uint8_t type_and_flags, /**< type and flags, see ecma_property_info_t */
                      ecma_property_value_t value, /**< property value */
                      ecma_property_t **out_prop_p) /**< [out] the property is also returned
                                                     *         if this field is non-NULL */
{
  JERRY_ASSERT (ECMA_PROPERTY_PAIR_ITEM_COUNT == 2);

  jmem_cpointer_t *property_list_head_p = &object_p->property_list_or_bound_object_cp;

  if (*property_list_head_p != ECMA_NULL_POINTER)
  {
    /* If the first entry is free (deleted), it is reused. */
    ecma_property_header_t *first_property_p = ECMA_GET_NON_NULL_POINTER (ecma_property_header_t,
                                                                          *property_list_head_p);
    bool has_hashmap = false;

    if (first_property_p->types[0] == ECMA_PROPERTY_TYPE_HASHMAP)
    {
      property_list_head_p = &first_property_p->next_property_cp;
      first_property_p = ECMA_GET_NON_NULL_POINTER (ecma_property_header_t,
                                                    *property_list_head_p);
      has_hashmap = true;
    }

    JERRY_ASSERT (ECMA_PROPERTY_IS_PROPERTY_PAIR (first_property_p));

    if (first_property_p->types[0] == ECMA_PROPERTY_TYPE_DELETED)
    {
      ecma_property_pair_t *first_property_pair_p = (ecma_property_pair_t *) first_property_p;

      if (name_p == NULL)
      {
        first_property_pair_p->names_cp[0] = ECMA_NULL_POINTER;
      }
      else
      {
        ecma_property_t name_type;
        first_property_pair_p->names_cp[0] = ecma_string_to_property_name (name_p,
                                                                           &name_type);
        type_and_flags = (ecma_property_t) (type_and_flags | name_type);
      }

      first_property_p->types[0] = type_and_flags;

      ecma_property_t *property_p = first_property_p->types + 0;

      JERRY_ASSERT (ECMA_PROPERTY_VALUE_PTR (property_p) == first_property_pair_p->values + 0);

      if (out_prop_p != NULL)
      {
        *out_prop_p = property_p;
      }

      first_property_pair_p->values[0] = value;

      /* The property must be fully initialized before ecma_property_hashmap_insert
       * is called, because the insert operation may reallocate the hashmap, and
       * that triggers garbage collection which scans all properties of all objects.
       * A not fully initialized but queued property may cause a crash. */

      if (has_hashmap && name_p != NULL)
      {
        ecma_property_hashmap_insert (object_p,
                                      name_p,
                                      first_property_pair_p,
                                      0);
      }

      return first_property_pair_p->values + 0;
    }
  }

  /* Otherwise we create a new property pair and use its second value. */
  ecma_property_pair_t *first_property_pair_p = ecma_alloc_property_pair ();

  /* Need to query property_list_head_p again and recheck the existennce
   * of property hasmap, because ecma_alloc_property_pair may delete them. */
  property_list_head_p = &object_p->property_list_or_bound_object_cp;
  bool has_hashmap = false;

  if (*property_list_head_p != ECMA_NULL_POINTER)
  {
    ecma_property_header_t *first_property_p = ECMA_GET_NON_NULL_POINTER (ecma_property_header_t,
                                                                          *property_list_head_p);

    if (first_property_p->types[0] == ECMA_PROPERTY_TYPE_HASHMAP)
    {
      property_list_head_p = &first_property_p->next_property_cp;
      has_hashmap = true;
    }
  }

  /* Just copy the previous value (no need to decompress, compress). */
  first_property_pair_p->header.next_property_cp = *property_list_head_p;
  first_property_pair_p->header.types[0] = ECMA_PROPERTY_TYPE_DELETED;
  first_property_pair_p->names_cp[0] = ECMA_PROPERTY_DELETED_NAME;

  if (name_p == NULL)
  {
    first_property_pair_p->names_cp[1] = ECMA_NULL_POINTER;
  }
  else
  {
    ecma_property_t name_type;
    first_property_pair_p->names_cp[1] = ecma_string_to_property_name (name_p,
                                                                       &name_type);
    type_and_flags = (ecma_property_t) (type_and_flags | name_type);
  }

  first_property_pair_p->header.types[1] = type_and_flags;

  ECMA_SET_NON_NULL_POINTER (*property_list_head_p, &first_property_pair_p->header);

  ecma_property_t *property_p = first_property_pair_p->header.types + 1;

  JERRY_ASSERT (ECMA_PROPERTY_VALUE_PTR (property_p) == first_property_pair_p->values + 1);

  if (out_prop_p != NULL)
  {
    *out_prop_p = property_p;
  }

  first_property_pair_p->values[1] = value;

  /* See the comment before the other ecma_property_hashmap_insert above. */

  if (has_hashmap && name_p != NULL)
  {
    ecma_property_hashmap_insert (object_p,
                                  name_p,
                                  first_property_pair_p,
                                  1);
  }

  return first_property_pair_p->values + 1;
} /* ecma_create_property */

/**
 * Create named data property with given name, attributes and undefined value
 * in the specified object.
 *
 * @return pointer to the newly created property value
 */
ecma_property_value_t *
ecma_create_named_data_property (ecma_object_t *object_p, /**< object */
                                 ecma_string_t *name_p, /**< property name */
                                 uint8_t prop_attributes, /**< property attributes (See: ecma_property_flags_t) */
                                 ecma_property_t **out_prop_p) /**< [out] the property is also returned
                                                                *         if this field is non-NULL */
{
  JERRY_ASSERT (object_p != NULL && name_p != NULL);
  JERRY_ASSERT (ecma_find_named_property (object_p, name_p) == NULL);
  JERRY_ASSERT ((prop_attributes & ~ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE_WRITABLE) == 0);

  uint8_t type_and_flags = ECMA_PROPERTY_TYPE_NAMEDDATA | prop_attributes;

  ecma_property_value_t value;
  value.value = ECMA_VALUE_UNDEFINED;

  return ecma_create_property (object_p, name_p, type_and_flags, value, out_prop_p);
} /* ecma_create_named_data_property */

/**
 * Create named accessor property with given name, attributes, getter and setter.
 *
 * @return pointer to the newly created property value
 */
ecma_property_value_t *
ecma_create_named_accessor_property (ecma_object_t *object_p, /**< object */
                                     ecma_string_t *name_p, /**< property name */
                                     ecma_object_t *get_p, /**< getter */
                                     ecma_object_t *set_p, /**< setter */
                                     uint8_t prop_attributes, /**< property attributes */
                                     ecma_property_t **out_prop_p) /**< [out] the property is also returned
                                                                    *         if this field is non-NULL */
{
  JERRY_ASSERT (object_p != NULL && name_p != NULL);
  JERRY_ASSERT (ecma_find_named_property (object_p, name_p) == NULL);
  JERRY_ASSERT ((prop_attributes & ~ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE) == 0);

  uint8_t type_and_flags = ECMA_PROPERTY_TYPE_NAMEDACCESSOR | prop_attributes;

  ecma_property_value_t value;
#ifdef JERRY_CPOINTER_32_BIT
  ecma_getter_setter_pointers_t *getter_setter_pair_p;
  getter_setter_pair_p = jmem_pools_alloc (sizeof (ecma_getter_setter_pointers_t));
  ECMA_SET_POINTER (getter_setter_pair_p->getter_p, get_p);
  ECMA_SET_POINTER (getter_setter_pair_p->setter_p, set_p);
  ECMA_SET_POINTER (value.getter_setter_pair_cp, getter_setter_pair_p);
#else /* !JERRY_CPOINTER_32_BIT */
  ECMA_SET_POINTER (value.getter_setter_pair.getter_p, get_p);
  ECMA_SET_POINTER (value.getter_setter_pair.setter_p, set_p);
#endif /* JERRY_CPOINTER_32_BIT */

  return ecma_create_property (object_p, name_p, type_and_flags, value, out_prop_p);
} /* ecma_create_named_accessor_property */

/**
 * Find named data property or named access property in specified object.
 *
 * @return pointer to the property, if it is found,
 *         NULL - otherwise.
 */
ecma_property_t *
ecma_find_named_property (ecma_object_t *obj_p, /**< object to find property in */
                          ecma_string_t *name_p) /**< property's name */
{
  JERRY_ASSERT (obj_p != NULL);
  JERRY_ASSERT (name_p != NULL);

  ecma_property_t *property_p = ecma_lcache_lookup (obj_p, name_p);

  if (property_p != NULL)
  {
    return property_p;
  }

  ecma_property_header_t *prop_iter_p = ecma_get_property_list (obj_p);

#ifndef CONFIG_ECMA_PROPERTY_HASHMAP_DISABLE
  if (prop_iter_p != NULL && prop_iter_p->types[0] == ECMA_PROPERTY_TYPE_HASHMAP)
  {
    jmem_cpointer_t property_real_name_cp;
    property_p = ecma_property_hashmap_find ((ecma_property_hashmap_t *) prop_iter_p,
                                             name_p,
                                             &property_real_name_cp);

    if (property_p != NULL
        && !ecma_is_property_lcached (property_p))
    {
      ecma_lcache_insert (obj_p, property_real_name_cp, property_p);
    }

    return property_p;
  }
#endif /* !CONFIG_ECMA_PROPERTY_HASHMAP_DISABLE */

  JERRY_ASSERT (ECMA_PROPERTY_PAIR_ITEM_COUNT == 2);

  uint32_t steps = 0;
  jmem_cpointer_t property_name_cp = ECMA_NULL_POINTER;

  if (ECMA_IS_DIRECT_STRING (name_p))
  {
    ecma_property_t prop_name_type = (ecma_property_t) ECMA_GET_DIRECT_STRING_TYPE (name_p);
    property_name_cp = (jmem_cpointer_t) ECMA_GET_DIRECT_STRING_VALUE (name_p);

    JERRY_ASSERT (prop_name_type > 0);

    while (prop_iter_p != NULL)
    {
      JERRY_ASSERT (ECMA_PROPERTY_IS_PROPERTY_PAIR (prop_iter_p));

      ecma_property_pair_t *prop_pair_p = (ecma_property_pair_t *) prop_iter_p;

      if (prop_pair_p->names_cp[0] == property_name_cp
          && ECMA_PROPERTY_GET_NAME_TYPE (prop_iter_p->types[0]) == prop_name_type)
      {
        JERRY_ASSERT (ECMA_PROPERTY_IS_NAMED_PROPERTY (prop_iter_p->types[0]));

        property_p = prop_iter_p->types + 0;
        break;
      }

      if (prop_pair_p->names_cp[1] == property_name_cp
          && ECMA_PROPERTY_GET_NAME_TYPE (prop_iter_p->types[1]) == prop_name_type)
      {
        JERRY_ASSERT (ECMA_PROPERTY_IS_NAMED_PROPERTY (prop_iter_p->types[1]));

        property_p = prop_iter_p->types + 1;
        break;
      }

      steps++;

      prop_iter_p = ECMA_GET_POINTER (ecma_property_header_t,
                                      prop_iter_p->next_property_cp);
    }
  }
  else
  {
    while (prop_iter_p != NULL)
    {
      JERRY_ASSERT (ECMA_PROPERTY_IS_PROPERTY_PAIR (prop_iter_p));

      ecma_property_pair_t *prop_pair_p = (ecma_property_pair_t *) prop_iter_p;

      if (ECMA_PROPERTY_GET_NAME_TYPE (prop_iter_p->types[0]) == ECMA_DIRECT_STRING_PTR)
      {
        property_name_cp = prop_pair_p->names_cp[0];
        ecma_string_t *prop_name_p = ECMA_GET_NON_NULL_POINTER (ecma_string_t, property_name_cp);

        if (ecma_compare_ecma_non_direct_strings (name_p, prop_name_p))
        {
          property_p = prop_iter_p->types + 0;
          break;
        }
      }

      if (ECMA_PROPERTY_GET_NAME_TYPE (prop_iter_p->types[1]) == ECMA_DIRECT_STRING_PTR)
      {
        property_name_cp = prop_pair_p->names_cp[1];
        ecma_string_t *prop_name_p = ECMA_GET_NON_NULL_POINTER (ecma_string_t, property_name_cp);

        if (ecma_compare_ecma_non_direct_strings (name_p, prop_name_p))
        {
          property_p = prop_iter_p->types + 1;
          break;
        }
      }

      steps++;

      prop_iter_p = ECMA_GET_POINTER (ecma_property_header_t,
                                      prop_iter_p->next_property_cp);
    }
  }

  if (steps >= (ECMA_PROPERTY_HASMAP_MINIMUM_SIZE / 2))
  {
    ecma_property_hashmap_create (obj_p);
  }

  if (property_p != NULL
      && !ecma_is_property_lcached (property_p))
  {
    ecma_lcache_insert (obj_p, property_name_cp, property_p);
  }

  return property_p;
} /* ecma_find_named_property */

/**
 * Get named data property or named access property in specified object.
 *
 * Warning:
 *         the property must exist
 *
 * @return pointer to the property, if it is found,
 *         NULL - otherwise.
 */
ecma_property_value_t *
ecma_get_named_data_property (ecma_object_t *obj_p, /**< object to find property in */
                              ecma_string_t *name_p) /**< property's name */
{
  JERRY_ASSERT (obj_p != NULL);
  JERRY_ASSERT (name_p != NULL);

  ecma_property_t *property_p = ecma_find_named_property (obj_p, name_p);

  JERRY_ASSERT (property_p != NULL
                && ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA);

  return ECMA_PROPERTY_VALUE_PTR (property_p);
} /* ecma_get_named_data_property */

/**
 * Free property values and change their type to deleted.
 */
void
ecma_free_property (ecma_object_t *object_p, /**< object the property belongs to */
                    jmem_cpointer_t name_cp, /**< name of the property or ECMA_NULL_POINTER */
                    ecma_property_t *property_p) /**< property */
{
  JERRY_ASSERT (object_p != NULL && property_p != NULL);

  switch (ECMA_PROPERTY_GET_TYPE (*property_p))
  {
    case ECMA_PROPERTY_TYPE_NAMEDDATA:
    {
      if (ECMA_PROPERTY_GET_NAME_TYPE (*property_p) == ECMA_DIRECT_STRING_MAGIC
          && (name_cp == LIT_INTERNAL_MAGIC_STRING_NATIVE_HANDLE
              || name_cp == LIT_INTERNAL_MAGIC_STRING_NATIVE_POINTER))
      {
        ecma_free_native_pointer (property_p);
        break;
      }

      ecma_free_value_if_not_object (ECMA_PROPERTY_VALUE_PTR (property_p)->value);
      break;
    }
    default:
    {
      JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);
#ifdef JERRY_CPOINTER_32_BIT
      ecma_getter_setter_pointers_t *getter_setter_pair_p;
      getter_setter_pair_p = ECMA_GET_POINTER (ecma_getter_setter_pointers_t,
                                               ECMA_PROPERTY_VALUE_PTR (property_p)->getter_setter_pair_cp);
      jmem_pools_free (getter_setter_pair_p, sizeof (ecma_getter_setter_pointers_t));
#endif /* JERRY_CPOINTER_32_BIT */
      break;
    }
  }

  if (ecma_is_property_lcached (property_p))
  {
    ecma_lcache_invalidate (object_p, name_cp, property_p);
  }

  if (ECMA_PROPERTY_GET_NAME_TYPE (*property_p) == ECMA_DIRECT_STRING_PTR)
  {
    ecma_string_t *prop_name_p = ECMA_GET_NON_NULL_POINTER (ecma_string_t, name_cp);
    ecma_deref_ecma_string (prop_name_p);
  }
} /* ecma_free_property */

/**
 * Delete the object's property referenced by its value pointer.
 *
 * Note: specified property must be owned by specified object.
 */
void
ecma_delete_property (ecma_object_t *object_p, /**< object */
                      ecma_property_value_t *prop_value_p) /**< property value reference */
{
  ecma_property_header_t *cur_prop_p = ecma_get_property_list (object_p);
  ecma_property_header_t *prev_prop_p = NULL;
  ecma_property_hashmap_delete_status hashmap_status = ECMA_PROPERTY_HASHMAP_DELETE_NO_HASHMAP;

  if (cur_prop_p != NULL && cur_prop_p->types[0] == ECMA_PROPERTY_TYPE_HASHMAP)
  {
    prev_prop_p = cur_prop_p;
    cur_prop_p = ECMA_GET_POINTER (ecma_property_header_t,
                                   cur_prop_p->next_property_cp);
    hashmap_status = ECMA_PROPERTY_HASHMAP_DELETE_HAS_HASHMAP;
  }

  while (true)
  {
    JERRY_ASSERT (cur_prop_p != NULL);
    JERRY_ASSERT (ECMA_PROPERTY_IS_PROPERTY_PAIR (cur_prop_p));

    ecma_property_pair_t *prop_pair_p = (ecma_property_pair_t *) cur_prop_p;

    for (int i = 0; i < ECMA_PROPERTY_PAIR_ITEM_COUNT; i++)
    {
      if ((prop_pair_p->values + i) == prop_value_p)
      {
        JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (cur_prop_p->types[i]) != ECMA_PROPERTY_TYPE_SPECIAL);

        if (hashmap_status == ECMA_PROPERTY_HASHMAP_DELETE_HAS_HASHMAP)
        {
          hashmap_status = ecma_property_hashmap_delete (object_p,
                                                         prop_pair_p->names_cp[i],
                                                         cur_prop_p->types + i);
        }

        ecma_free_property (object_p, prop_pair_p->names_cp[i], cur_prop_p->types + i);
        cur_prop_p->types[i] = ECMA_PROPERTY_TYPE_DELETED;
        prop_pair_p->names_cp[i] = ECMA_PROPERTY_DELETED_NAME;

        JERRY_ASSERT (ECMA_PROPERTY_PAIR_ITEM_COUNT == 2);

        if (cur_prop_p->types[1 - i] != ECMA_PROPERTY_TYPE_DELETED)
        {
          /* The other property is still valid. */
          if (hashmap_status == ECMA_PROPERTY_HASHMAP_DELETE_RECREATE_HASHMAP)
          {
            ecma_property_hashmap_free (object_p);
            ecma_property_hashmap_create (object_p);
          }
          return;
        }

        JERRY_ASSERT (cur_prop_p->types[i] == ECMA_PROPERTY_TYPE_DELETED);

        if (prev_prop_p == NULL)
        {
          object_p->property_list_or_bound_object_cp = cur_prop_p->next_property_cp;
        }
        else
        {
          prev_prop_p->next_property_cp = cur_prop_p->next_property_cp;
        }

        ecma_dealloc_property_pair ((ecma_property_pair_t *) cur_prop_p);

        if (hashmap_status == ECMA_PROPERTY_HASHMAP_DELETE_RECREATE_HASHMAP)
        {
          ecma_property_hashmap_free (object_p);
          ecma_property_hashmap_create (object_p);
        }
        return;
      }
    }

    prev_prop_p = cur_prop_p;
    cur_prop_p = ECMA_GET_POINTER (ecma_property_header_t,
                                   cur_prop_p->next_property_cp);
  }
} /* ecma_delete_property */

/**
 * Low level delete of array items from new_length to old_length
 *
 * Note: new_length must be less than old_length
 *
 * @return the updated value of new_length
 */
uint32_t
ecma_delete_array_properties (ecma_object_t *object_p, /**< object */
                              uint32_t new_length, /**< new length */
                              uint32_t old_length) /**< old length */
{
  JERRY_ASSERT (new_length < old_length);

  /* First the minimum value of new_length is updated. */
  ecma_property_header_t *current_prop_p = ecma_get_property_list (object_p);

  if (current_prop_p == NULL)
  {
    return new_length;
  }

  if (current_prop_p->types[0] == ECMA_PROPERTY_TYPE_HASHMAP)
  {
    current_prop_p = ECMA_GET_POINTER (ecma_property_header_t,
                                       current_prop_p->next_property_cp);
  }

  while (current_prop_p != NULL)
  {
    JERRY_ASSERT (ECMA_PROPERTY_IS_PROPERTY_PAIR (current_prop_p));

    ecma_property_pair_t *prop_pair_p = (ecma_property_pair_t *) current_prop_p;

    for (int i = 0; i < ECMA_PROPERTY_PAIR_ITEM_COUNT; i++)
    {
      if (ECMA_PROPERTY_IS_NAMED_PROPERTY (current_prop_p->types[i])
          && !ecma_is_property_configurable (current_prop_p->types[i]))
      {
        uint32_t index = ecma_string_get_property_index (current_prop_p->types[i],
                                                         prop_pair_p->names_cp[i]);

        if (index < old_length && index >= new_length)
        {
          JERRY_ASSERT (index != ECMA_STRING_NOT_ARRAY_INDEX);

          new_length = index + 1;

          if (new_length == old_length)
          {
            /* Early return. */
            return new_length;
          }
        }
      }
    }

    current_prop_p = ECMA_GET_POINTER (ecma_property_header_t,
                                       current_prop_p->next_property_cp);
  }

  /* Second all properties between new_length and old_length are deleted. */
  current_prop_p = ecma_get_property_list (object_p);
  ecma_property_header_t *prev_prop_p = NULL;
  ecma_property_hashmap_delete_status hashmap_status = ECMA_PROPERTY_HASHMAP_DELETE_NO_HASHMAP;

  if (current_prop_p->types[0] == ECMA_PROPERTY_TYPE_HASHMAP)
  {
    prev_prop_p = current_prop_p;
    current_prop_p = ECMA_GET_POINTER (ecma_property_header_t,
                                       current_prop_p->next_property_cp);
    hashmap_status = ECMA_PROPERTY_HASHMAP_DELETE_HAS_HASHMAP;
  }

  while (current_prop_p != NULL)
  {
    ecma_property_pair_t *prop_pair_p = (ecma_property_pair_t *) current_prop_p;

    for (int i = 0; i < ECMA_PROPERTY_PAIR_ITEM_COUNT; i++)
    {
      if (ECMA_PROPERTY_IS_NAMED_PROPERTY (current_prop_p->types[i])
          && ecma_is_property_configurable (current_prop_p->types[i]))
      {
        uint32_t index = ecma_string_get_property_index (current_prop_p->types[i],
                                                         prop_pair_p->names_cp[i]);

        if (index < old_length && index >= new_length)
        {
          JERRY_ASSERT (index != ECMA_STRING_NOT_ARRAY_INDEX);

          if (hashmap_status == ECMA_PROPERTY_HASHMAP_DELETE_HAS_HASHMAP)
          {
            hashmap_status = ecma_property_hashmap_delete (object_p,
                                                           prop_pair_p->names_cp[i],
                                                           current_prop_p->types + i);
          }

          ecma_free_property (object_p, prop_pair_p->names_cp[i], current_prop_p->types + i);
          current_prop_p->types[i] = ECMA_PROPERTY_TYPE_DELETED;
          prop_pair_p->names_cp[i] = ECMA_PROPERTY_DELETED_NAME;
        }
      }
    }

    if (current_prop_p->types[0] == ECMA_PROPERTY_TYPE_DELETED
        && current_prop_p->types[1] == ECMA_PROPERTY_TYPE_DELETED)
    {
      if (prev_prop_p == NULL)
      {
        object_p->property_list_or_bound_object_cp = current_prop_p->next_property_cp;
      }
      else
      {
        prev_prop_p->next_property_cp = current_prop_p->next_property_cp;
      }

      ecma_property_header_t *next_prop_p = ECMA_GET_POINTER (ecma_property_header_t,
                                                              current_prop_p->next_property_cp);
      ecma_dealloc_property_pair ((ecma_property_pair_t *) current_prop_p);
      current_prop_p = next_prop_p;
    }
    else
    {
      prev_prop_p = current_prop_p;
      current_prop_p = ECMA_GET_POINTER (ecma_property_header_t,
                                         current_prop_p->next_property_cp);
    }
  }

  if (hashmap_status == ECMA_PROPERTY_HASHMAP_DELETE_RECREATE_HASHMAP)
  {
    ecma_property_hashmap_free (object_p);
    ecma_property_hashmap_create (object_p);
  }

  return new_length;
} /* ecma_delete_array_properties */

/**
 * Check whether the object contains a property
 */
static void
ecma_assert_object_contains_the_property (const ecma_object_t *object_p, /**< ecma-object */
                                          const ecma_property_value_t *prop_value_p, /**< property value */
                                          ecma_property_types_t type) /**< expected property type */
{
#ifndef JERRY_NDEBUG
  ecma_property_header_t *prop_iter_p = ecma_get_property_list (object_p);

  JERRY_ASSERT (prop_iter_p != NULL);

  if (prop_iter_p->types[0] == ECMA_PROPERTY_TYPE_HASHMAP)
  {
    prop_iter_p = ECMA_GET_POINTER (ecma_property_header_t,
                                    prop_iter_p->next_property_cp);
  }

  while (true)
  {
    JERRY_ASSERT (prop_iter_p != NULL);
    JERRY_ASSERT (ECMA_PROPERTY_IS_PROPERTY_PAIR (prop_iter_p));

    ecma_property_pair_t *prop_pair_p = (ecma_property_pair_t *) prop_iter_p;

    for (int i = 0; i < ECMA_PROPERTY_PAIR_ITEM_COUNT; i++)
    {
      if ((prop_pair_p->values + i) == prop_value_p)
      {
        JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (prop_pair_p->header.types[i]) == type);
        return;
      }
    }

    prop_iter_p = ECMA_GET_POINTER (ecma_property_header_t,
                                    prop_iter_p->next_property_cp);
  }
#else /* JERRY_NDEBUG */
  JERRY_UNUSED (object_p);
  JERRY_UNUSED (prop_value_p);
  JERRY_UNUSED (type);
#endif /* !JERRY_NDEBUG */
} /* ecma_assert_object_contains_the_property */

/**
 * Assign value to named data property
 *
 * Note:
 *      value previously stored in the property is freed
 */
inline void JERRY_ATTR_ALWAYS_INLINE
ecma_named_data_property_assign_value (ecma_object_t *obj_p, /**< object */
                                       ecma_property_value_t *prop_value_p, /**< property value reference */
                                       ecma_value_t value) /**< value to assign */
{
  ecma_assert_object_contains_the_property (obj_p, prop_value_p, ECMA_PROPERTY_TYPE_NAMEDDATA);

  ecma_value_assign_value (&prop_value_p->value, value);
} /* ecma_named_data_property_assign_value */

/**
 * Get getter of named accessor property
 *
 * @return pointer to object - getter of the property
 */
ecma_object_t *
ecma_get_named_accessor_property_getter (const ecma_property_value_t *prop_value_p) /**< property value reference */
{
#ifdef JERRY_CPOINTER_32_BIT
  ecma_getter_setter_pointers_t *getter_setter_pair_p;
  getter_setter_pair_p = ECMA_GET_POINTER (ecma_getter_setter_pointers_t,
                                           prop_value_p->getter_setter_pair_cp);
  return ECMA_GET_POINTER (ecma_object_t, getter_setter_pair_p->getter_p);
#else /* !JERRY_CPOINTER_32_BIT */
  return ECMA_GET_POINTER (ecma_object_t, prop_value_p->getter_setter_pair.getter_p);
#endif /* JERRY_CPOINTER_32_BIT */
} /* ecma_get_named_accessor_property_getter */

/**
 * Get setter of named accessor property
 *
 * @return pointer to object - setter of the property
 */
ecma_object_t *
ecma_get_named_accessor_property_setter (const ecma_property_value_t *prop_value_p) /**< property value reference */
{
#ifdef JERRY_CPOINTER_32_BIT
  ecma_getter_setter_pointers_t *getter_setter_pair_p;
  getter_setter_pair_p = ECMA_GET_POINTER (ecma_getter_setter_pointers_t,
                                           prop_value_p->getter_setter_pair_cp);
  return ECMA_GET_POINTER (ecma_object_t, getter_setter_pair_p->setter_p);
#else /* !JERRY_CPOINTER_32_BIT */
  return ECMA_GET_POINTER (ecma_object_t, prop_value_p->getter_setter_pair.setter_p);
#endif /* JERRY_CPOINTER_32_BIT */
} /* ecma_get_named_accessor_property_setter */

/**
 * Set getter of named accessor property
 */
void
ecma_set_named_accessor_property_getter (ecma_object_t *object_p, /**< the property's container */
                                         ecma_property_value_t *prop_value_p, /**< property value reference */
                                         ecma_object_t *getter_p) /**< getter object */
{
  ecma_assert_object_contains_the_property (object_p, prop_value_p, ECMA_PROPERTY_TYPE_NAMEDACCESSOR);

#ifdef JERRY_CPOINTER_32_BIT
  ecma_getter_setter_pointers_t *getter_setter_pair_p;
  getter_setter_pair_p = ECMA_GET_POINTER (ecma_getter_setter_pointers_t,
                                           prop_value_p->getter_setter_pair_cp);
  ECMA_SET_POINTER (getter_setter_pair_p->getter_p, getter_p);
#else /* !JERRY_CPOINTER_32_BIT */
  ECMA_SET_POINTER (prop_value_p->getter_setter_pair.getter_p, getter_p);
#endif /* JERRY_CPOINTER_32_BIT */
} /* ecma_set_named_accessor_property_getter */

/**
 * Set setter of named accessor property
 */
void
ecma_set_named_accessor_property_setter (ecma_object_t *object_p, /**< the property's container */
                                         ecma_property_value_t *prop_value_p, /**< property value reference */
                                         ecma_object_t *setter_p) /**< setter object */
{
  ecma_assert_object_contains_the_property (object_p, prop_value_p, ECMA_PROPERTY_TYPE_NAMEDACCESSOR);

#ifdef JERRY_CPOINTER_32_BIT
  ecma_getter_setter_pointers_t *getter_setter_pair_p;
  getter_setter_pair_p = ECMA_GET_POINTER (ecma_getter_setter_pointers_t,
                                           prop_value_p->getter_setter_pair_cp);
  ECMA_SET_POINTER (getter_setter_pair_p->setter_p, setter_p);
#else /* !JERRY_CPOINTER_32_BIT */
  ECMA_SET_POINTER (prop_value_p->getter_setter_pair.setter_p, setter_p);
#endif /* JERRY_CPOINTER_32_BIT */
} /* ecma_set_named_accessor_property_setter */

/**
 * Get property's 'Writable' attribute value
 *
 * @return true - property is writable,
 *         false - otherwise
 */
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_is_property_writable (ecma_property_t property) /**< property */
{
  JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (property) == ECMA_PROPERTY_TYPE_NAMEDDATA
                || ECMA_PROPERTY_GET_TYPE (property) == ECMA_PROPERTY_TYPE_VIRTUAL);

  return (property & ECMA_PROPERTY_FLAG_WRITABLE) != 0;
} /* ecma_is_property_writable */

/**
 * Set property's 'Writable' attribute value
 */
void
ecma_set_property_writable_attr (ecma_property_t *property_p, /**< [in,out] property */
                                 bool is_writable) /**< new value for writable flag */
{
  JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA);

  if (is_writable)
  {
    *property_p = (uint8_t) (*property_p | ECMA_PROPERTY_FLAG_WRITABLE);
  }
  else
  {
    *property_p = (uint8_t) (*property_p & ~ECMA_PROPERTY_FLAG_WRITABLE);
  }
} /* ecma_set_property_writable_attr */

/**
 * Get property's 'Enumerable' attribute value
 *
 * @return true - property is enumerable,
 *         false - otherwise
 */
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_is_property_enumerable (ecma_property_t property) /**< property */
{
  JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (property) == ECMA_PROPERTY_TYPE_NAMEDDATA
                || ECMA_PROPERTY_GET_TYPE (property) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR
                || ECMA_PROPERTY_GET_TYPE (property) == ECMA_PROPERTY_TYPE_VIRTUAL);

  return (property & ECMA_PROPERTY_FLAG_ENUMERABLE) != 0;
} /* ecma_is_property_enumerable */

/**
 * Set property's 'Enumerable' attribute value
 */
void
ecma_set_property_enumerable_attr (ecma_property_t *property_p, /**< [in,out] property */
                                   bool is_enumerable) /**< new value for enumerable flag */
{
  JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA
                || ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);

  if (is_enumerable)
  {
    *property_p = (uint8_t) (*property_p | ECMA_PROPERTY_FLAG_ENUMERABLE);
  }
  else
  {
    *property_p = (uint8_t) (*property_p & ~ECMA_PROPERTY_FLAG_ENUMERABLE);
  }
} /* ecma_set_property_enumerable_attr */

/**
 * Get property's 'Configurable' attribute value
 *
 * @return true - property is configurable,
 *         false - otherwise
 */
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_is_property_configurable (ecma_property_t property) /**< property */
{
  JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (property) == ECMA_PROPERTY_TYPE_NAMEDDATA
                || ECMA_PROPERTY_GET_TYPE (property) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR
                || ECMA_PROPERTY_GET_TYPE (property) == ECMA_PROPERTY_TYPE_VIRTUAL);

  return (property & ECMA_PROPERTY_FLAG_CONFIGURABLE) != 0;
} /* ecma_is_property_configurable */

/**
 * Set property's 'Configurable' attribute value
 */
void
ecma_set_property_configurable_attr (ecma_property_t *property_p, /**< [in,out] property */
                                     bool is_configurable) /**< new value for configurable flag */
{
  JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA
                || ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);

  if (is_configurable)
  {
    *property_p = (uint8_t) (*property_p | ECMA_PROPERTY_FLAG_CONFIGURABLE);
  }
  else
  {
    *property_p = (uint8_t) (*property_p & ~ECMA_PROPERTY_FLAG_CONFIGURABLE);
  }
} /* ecma_set_property_configurable_attr */

/**
 * Check whether the property is registered in LCache
 *
 * @return true / false
 */
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_is_property_lcached (ecma_property_t *property_p) /**< property */
{
  JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA
                || ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);

  return (*property_p & ECMA_PROPERTY_FLAG_LCACHED) != 0;
} /* ecma_is_property_lcached */

/**
 * Set value of flag indicating whether the property is registered in LCache
 */
inline void JERRY_ATTR_ALWAYS_INLINE
ecma_set_property_lcached (ecma_property_t *property_p, /**< property */
                           bool is_lcached) /**< new value for lcached flag */
{
  JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA
                || ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);

  if (is_lcached)
  {
    *property_p = (uint8_t) (*property_p | ECMA_PROPERTY_FLAG_LCACHED);
  }
  else
  {
    *property_p = (uint8_t) (*property_p & ~ECMA_PROPERTY_FLAG_LCACHED);
  }
} /* ecma_set_property_lcached */

/**
 * Construct empty property descriptor, i.e.:
 *  property descriptor with all is_defined flags set to false and the rest - to default value.
 *
 * @return empty property descriptor
 */
ecma_property_descriptor_t
ecma_make_empty_property_descriptor (void)
{
  ecma_property_descriptor_t prop_desc;

  prop_desc.is_value_defined = false;
  prop_desc.value = ECMA_VALUE_UNDEFINED;
  prop_desc.is_writable_defined = false;
  prop_desc.is_writable = false;
  prop_desc.is_enumerable_defined = false;
  prop_desc.is_enumerable = false;
  prop_desc.is_configurable_defined = false;
  prop_desc.is_configurable = false;
  prop_desc.is_get_defined = false;
  prop_desc.get_p = NULL;
  prop_desc.is_set_defined = false;
  prop_desc.set_p = NULL;

  return prop_desc;
} /* ecma_make_empty_property_descriptor */

/**
 * Free values contained in the property descriptor
 * and make it empty property descriptor
 */
void
ecma_free_property_descriptor (ecma_property_descriptor_t *prop_desc_p) /**< property descriptor */
{
  if (prop_desc_p->is_value_defined)
  {
    ecma_free_value (prop_desc_p->value);
  }

  if (prop_desc_p->is_get_defined
      && prop_desc_p->get_p != NULL)
  {
    ecma_deref_object (prop_desc_p->get_p);
  }

  if (prop_desc_p->is_set_defined
      && prop_desc_p->set_p != NULL)
  {
    ecma_deref_object (prop_desc_p->set_p);
  }

  *prop_desc_p = ecma_make_empty_property_descriptor ();
} /* ecma_free_property_descriptor */

/**
 * The size of error reference must be 8 bytes to use jmem_pools_alloc().
 */
JERRY_STATIC_ASSERT (sizeof (ecma_error_reference_t) == 8,
                     ecma_error_reference_size_must_be_8_bytes);

/**
 * Create an error reference from a given value.
 *
 * Note:
 *   Reference of the value is taken.
 *
 * @return error reference value
 */
ecma_value_t
ecma_create_error_reference (ecma_value_t value, /**< referenced value */
                             bool is_exception) /**< error reference is an exception */
{
  ecma_error_reference_t *error_ref_p = (ecma_error_reference_t *) jmem_pools_alloc (sizeof (ecma_error_reference_t));

  error_ref_p->refs_and_flags = ECMA_ERROR_REF_ONE | (is_exception ? 0 : ECMA_ERROR_REF_ABORT);
  error_ref_p->value = value;
  return ecma_make_error_reference_value (error_ref_p);
} /* ecma_create_error_reference */

/**
 * Create an error reference from the currently thrown error value.
 *
 * @return error reference value
 */
ecma_value_t
ecma_create_error_reference_from_context (void)
{
  return ecma_create_error_reference (JERRY_CONTEXT (error_value),
                                      (JERRY_CONTEXT (status_flags) & ECMA_STATUS_EXCEPTION) != 0);
} /* ecma_create_error_reference_from_context */

/**
 * Create an error reference from a given object.
 *
 * Note:
 *   Reference of the value is taken.
 *
 * @return error reference value
 */
inline ecma_value_t JERRY_ATTR_ALWAYS_INLINE
ecma_create_error_object_reference (ecma_object_t *object_p) /**< referenced object */
{
  return ecma_create_error_reference (ecma_make_object_value (object_p), true);
} /* ecma_create_error_object_reference */

/**
 * Increase ref count of an error reference.
 */
void
ecma_ref_error_reference (ecma_error_reference_t *error_ref_p) /**< error reference */
{
  if (JERRY_LIKELY (error_ref_p->refs_and_flags < ECMA_ERROR_MAX_REF))
  {
    error_ref_p->refs_and_flags += ECMA_ERROR_REF_ONE;
  }
  else
  {
    jerry_fatal (ERR_REF_COUNT_LIMIT);
  }
} /* ecma_ref_error_reference */

/**
 * Decrease ref count of an error reference.
 */
void
ecma_deref_error_reference (ecma_error_reference_t *error_ref_p) /**< error reference */
{
  JERRY_ASSERT (error_ref_p->refs_and_flags >= ECMA_ERROR_REF_ONE);

  error_ref_p->refs_and_flags -= ECMA_ERROR_REF_ONE;

  if (error_ref_p->refs_and_flags < ECMA_ERROR_REF_ONE)
  {
    ecma_free_value (error_ref_p->value);
    jmem_pools_free (error_ref_p, sizeof (ecma_error_reference_t));
  }
} /* ecma_deref_error_reference */

/**
 * Clears error reference, and returns with the value.
 *
 * @return value referenced by the error
 */
ecma_value_t
ecma_clear_error_reference (ecma_value_t value, /**< error reference */
                            bool set_abort_flag) /**< set abort flag */
{
  ecma_error_reference_t *error_ref_p = ecma_get_error_reference_from_value (value);

  if (set_abort_flag)
  {
    if (error_ref_p->refs_and_flags & ECMA_ERROR_REF_ABORT)
    {
      JERRY_CONTEXT (status_flags) &= (uint32_t) ~ECMA_STATUS_EXCEPTION;
    }
    else
    {
      JERRY_CONTEXT (status_flags) |= ECMA_STATUS_EXCEPTION;
    }
  }

  JERRY_ASSERT (error_ref_p->refs_and_flags >= ECMA_ERROR_REF_ONE);

  if (error_ref_p->refs_and_flags >= 2 * ECMA_ERROR_REF_ONE)
  {
    error_ref_p->refs_and_flags -= ECMA_ERROR_REF_ONE;
    return ecma_copy_value (error_ref_p->value);
  }

  ecma_value_t referenced_value = error_ref_p->value;
  jmem_pools_free (error_ref_p, sizeof (ecma_error_reference_t));
  return referenced_value;
} /* ecma_clear_error_reference */

/**
 * Increase reference counter of Compact
 * Byte Code or regexp byte code.
 */
void
ecma_bytecode_ref (ecma_compiled_code_t *bytecode_p) /**< byte code pointer */
{
  /* Abort program if maximum reference number is reached. */
  if (bytecode_p->refs >= UINT16_MAX)
  {
    jerry_fatal (ERR_REF_COUNT_LIMIT);
  }

  bytecode_p->refs++;
} /* ecma_bytecode_ref */

/**
 * Decrease reference counter of Compact
 * Byte Code or regexp byte code.
 */
void
ecma_bytecode_deref (ecma_compiled_code_t *bytecode_p) /**< byte code pointer */
{
  JERRY_ASSERT (bytecode_p->refs > 0);
  JERRY_ASSERT (!(bytecode_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION));

  bytecode_p->refs--;

  if (bytecode_p->refs > 0)
  {
    /* Non-zero reference counter. */
    return;
  }

  if (bytecode_p->status_flags & CBC_CODE_FLAGS_FUNCTION)
  {
    ecma_value_t *literal_start_p = NULL;
    uint32_t literal_end;
    uint32_t const_literal_end;

    if (bytecode_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
    {
      cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) bytecode_p;
      literal_end = args_p->literal_end;
      const_literal_end = args_p->const_literal_end;

      literal_start_p = (ecma_value_t *) ((uint8_t *) bytecode_p + sizeof (cbc_uint16_arguments_t));
      literal_start_p -= args_p->register_end;
    }
    else
    {
      cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) bytecode_p;
      literal_end = args_p->literal_end;
      const_literal_end = args_p->const_literal_end;

      literal_start_p = (ecma_value_t *) ((uint8_t *) bytecode_p + sizeof (cbc_uint8_arguments_t));
      literal_start_p -= args_p->register_end;
    }

    for (uint32_t i = const_literal_end; i < literal_end; i++)
    {
      ecma_compiled_code_t *bytecode_literal_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_compiled_code_t,
                                                                                  literal_start_p[i]);

      /* Self references are ignored. */
      if (bytecode_literal_p != bytecode_p)
      {
        ecma_bytecode_deref (bytecode_literal_p);
      }
    }

#ifdef JERRY_DEBUGGER
    if ((JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
        && !(bytecode_p->status_flags & CBC_CODE_FLAGS_DEBUGGER_IGNORE)
        && jerry_debugger_send_function_cp (JERRY_DEBUGGER_RELEASE_BYTE_CODE_CP, bytecode_p))
    {
      /* Delay the byte code free until the debugger client is notified.
       * If the connection is aborted the pointer is still freed by
       * jerry_debugger_close_connection(). */
      jerry_debugger_byte_code_free_t *byte_code_free_p = (jerry_debugger_byte_code_free_t *) bytecode_p;
      jmem_cpointer_t byte_code_free_head = JERRY_CONTEXT (debugger_byte_code_free_head);

      byte_code_free_p->prev_cp = ECMA_NULL_POINTER;

      jmem_cpointer_t byte_code_free_cp;
      JMEM_CP_SET_NON_NULL_POINTER (byte_code_free_cp, byte_code_free_p);

      if (byte_code_free_head == ECMA_NULL_POINTER)
      {
        JERRY_CONTEXT (debugger_byte_code_free_tail) = byte_code_free_cp;
      }
      else
      {
        jerry_debugger_byte_code_free_t *first_byte_code_free_p;

        first_byte_code_free_p = JMEM_CP_GET_NON_NULL_POINTER (jerry_debugger_byte_code_free_t,
                                                               byte_code_free_head);
        first_byte_code_free_p->prev_cp = byte_code_free_cp;
      }

      JERRY_CONTEXT (debugger_byte_code_free_head) = byte_code_free_cp;
      return;
    }
#endif /* JERRY_DEBUGGER */

#ifdef JMEM_STATS
    jmem_stats_free_byte_code_bytes (((size_t) bytecode_p->size) << JMEM_ALIGNMENT_LOG);
#endif /* JMEM_STATS */
  }
  else
  {
#ifndef CONFIG_DISABLE_REGEXP_BUILTIN
    re_compiled_code_t *re_bytecode_p = (re_compiled_code_t *) bytecode_p;

    ecma_deref_ecma_string (ecma_get_string_from_value (re_bytecode_p->pattern));
#endif /* !CONFIG_DISABLE_REGEXP_BUILTIN */
  }

  jmem_heap_free_block (bytecode_p,
                        ((size_t) bytecode_p->size) << JMEM_ALIGNMENT_LOG);
} /* ecma_bytecode_deref */

/**
 * @}
 * @}
 */