text: /* 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 <stdio.h>
  
  #include "debugger.h"
  #include "ecma-alloc.h"
  #include "ecma-array-object.h"
  #include "ecma-arraybuffer-object.h"
  #include "ecma-builtin-helpers.h"
  #include "ecma-builtins.h"
  #include "ecma-comparison.h"
  #include "ecma-dataview-object.h"
  #include "ecma-exceptions.h"
  #include "ecma-eval.h"
  #include "ecma-function-object.h"
  #include "ecma-gc.h"
  #include "ecma-helpers.h"
  #include "ecma-init-finalize.h"
  #include "ecma-lex-env.h"
  #include "ecma-literal-storage.h"
  #include "ecma-objects.h"
  #include "ecma-objects-general.h"
  #include "ecma-regexp-object.h"
  #include "ecma-promise-object.h"
  #include "ecma-symbol-object.h"
  #include "ecma-typedarray-object.h"
  #include "opcodes.h"
  #include "jcontext.h"
  #include "jerryscript.h"
  #include "jerryscript-debugger-transport.h"
  #include "jmem.h"
  #include "js-parser.h"
  #include "re-compiler.h"
  
  JERRY_STATIC_ASSERT (sizeof (jerry_value_t) == sizeof (ecma_value_t),
                       size_of_jerry_value_t_must_be_equal_to_size_of_ecma_value_t);
  
  JERRY_STATIC_ASSERT ((int) ECMA_ERROR_NONE == (int) JERRY_ERROR_NONE
                       && (int) ECMA_ERROR_COMMON == (int) JERRY_ERROR_COMMON
                       && (int) ECMA_ERROR_EVAL == (int) JERRY_ERROR_EVAL
                       && (int) ECMA_ERROR_RANGE == (int) JERRY_ERROR_RANGE
                       && (int) ECMA_ERROR_REFERENCE == (int) JERRY_ERROR_REFERENCE
                       && (int) ECMA_ERROR_SYNTAX == (int) JERRY_ERROR_SYNTAX
                       && (int) ECMA_ERROR_TYPE == (int) JERRY_ERROR_TYPE
                       && (int) ECMA_ERROR_URI == (int) JERRY_ERROR_URI,
                       ecma_standard_error_t_must_be_equal_to_jerry_error_t);
  
  JERRY_STATIC_ASSERT ((int) ECMA_INIT_EMPTY == (int) JERRY_INIT_EMPTY
                       && (int) ECMA_INIT_SHOW_OPCODES == (int) JERRY_INIT_SHOW_OPCODES
                       && (int) ECMA_INIT_SHOW_REGEXP_OPCODES == (int) JERRY_INIT_SHOW_REGEXP_OPCODES
                       && (int) ECMA_INIT_MEM_STATS == (int) JERRY_INIT_MEM_STATS,
                       ecma_init_flag_t_must_be_equal_to_jerry_init_flag_t);
  
  #if ENABLED (JERRY_BUILTIN_REGEXP)
  JERRY_STATIC_ASSERT ((int) RE_FLAG_GLOBAL == (int) JERRY_REGEXP_FLAG_GLOBAL
                       && (int) RE_FLAG_MULTILINE == (int) JERRY_REGEXP_FLAG_MULTILINE
                       && (int) RE_FLAG_IGNORE_CASE == (int) JERRY_REGEXP_FLAG_IGNORE_CASE,
                       re_flags_t_must_be_equal_to_jerry_regexp_flags_t);
  #endif /* ENABLED (JERRY_BUILTIN_REGEXP) */
  
  #if !ENABLED (JERRY_PARSER) && !ENABLED (JERRY_SNAPSHOT_EXEC)
  #error "JERRY_SNAPSHOT_EXEC must be enabled if JERRY_PARSER is disabled!"
  #endif /* !ENABLED (JERRY_PARSER) && !ENABLED (JERRY_SNAPSHOT_EXEC) */
  
  #if ENABLED (JERRY_ERROR_MESSAGES)
  
  /**
   * Error message, if an argument is has an error flag
   */
  static const char * const error_value_msg_p = "argument cannot have an error flag";
  
  /**
   * Error message, if types of arguments are incorrect
   */
  static const char * const wrong_args_msg_p = "wrong type of argument";
  
  #endif /* ENABLED (JERRY_ERROR_MESSAGES) */
  
  /** \addtogroup jerry Jerry engine interface
   * @{
   */
  
  /**
   * Assert that it is correct to call API in current state.
   *
   * Note:
   *         By convention, there are some states when API could not be invoked.
   *
   *         The API can be and only be invoked when the ECMA_STATUS_API_AVAILABLE
   *         flag is set.
   *
   *         This procedure checks whether the API is available, and terminates
   *         the engine if it is unavailable. Otherwise it is a no-op.
   *
   * Note:
   *         The API could not be invoked in the following cases:
   *           - before jerry_init and after jerry_cleanup
   *           - between enter to and return from a native free callback
   */
  static inline void JERRY_ATTR_ALWAYS_INLINE
  jerry_assert_api_available (void)
  {
    JERRY_ASSERT (JERRY_CONTEXT (status_flags) & ECMA_STATUS_API_AVAILABLE);
  } /* jerry_assert_api_available */
  
  /**
   * Turn on API availability
   */
  static inline void JERRY_ATTR_ALWAYS_INLINE
  jerry_make_api_available (void)
  {
    JERRY_CONTEXT (status_flags) |= ECMA_STATUS_API_AVAILABLE;
  } /* jerry_make_api_available */
  
  /**
   * Turn off API availability
   */
  static inline void JERRY_ATTR_ALWAYS_INLINE
  jerry_make_api_unavailable (void)
  {
    JERRY_CONTEXT (status_flags) &= (uint32_t) ~ECMA_STATUS_API_AVAILABLE;
  } /* jerry_make_api_unavailable */
  
  /**
   * Create an API compatible return value.
   *
   * @return return value for Jerry API functions
   */
  static jerry_value_t
  jerry_return (jerry_value_t value) /**< return value */
  {
    if (ECMA_IS_VALUE_ERROR (value))
    {
      value = ecma_create_error_reference_from_context ();
    }
  
    return value;
  } /* jerry_return */
  
  /**
   * Throw an API compatible return value.
   *
   * @return return value for Jerry API functions
   */
  static inline jerry_value_t JERRY_ATTR_ALWAYS_INLINE
  jerry_throw (jerry_value_t value) /**< return value */
  {
    JERRY_ASSERT (ECMA_IS_VALUE_ERROR (value));
    return ecma_create_error_reference_from_context ();
  } /* jerry_throw */
  
  /**
   * Jerry engine initialization
   */
  void
  jerry_init (jerry_init_flag_t flags) /**< combination of Jerry flags */
  {
    /* This function cannot be called twice unless jerry_cleanup is called. */
    JERRY_ASSERT (!(JERRY_CONTEXT (status_flags) & ECMA_STATUS_API_AVAILABLE));
  
    /* Zero out all non-external members. */
    memset (&JERRY_CONTEXT (JERRY_CONTEXT_FIRST_MEMBER), 0,
            sizeof (jerry_context_t) - offsetof (jerry_context_t, JERRY_CONTEXT_FIRST_MEMBER));
  
    JERRY_CONTEXT (jerry_init_flags) = flags;
  
    jerry_make_api_available ();
  
    jmem_init ();
    ecma_init ();
  } /* jerry_init */
  
  /**
   * Terminate Jerry engine
   */
  void
  jerry_cleanup (void)
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_DEBUGGER)
    if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
    {
      jerry_debugger_send_type (JERRY_DEBUGGER_CLOSE_CONNECTION);
  
      jerry_debugger_transport_close ();
    }
  #endif /* ENABLED (JERRY_DEBUGGER) */
  
    for (jerry_context_data_header_t *this_p = JERRY_CONTEXT (context_data_p);
         this_p != NULL;
         this_p = this_p->next_p)
    {
      if (this_p->manager_p->deinit_cb)
      {
        this_p->manager_p->deinit_cb (JERRY_CONTEXT_DATA_HEADER_USER_DATA (this_p));
      }
    }
  
  #if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
    ecma_free_all_enqueued_jobs ();
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
    ecma_finalize ();
    jerry_make_api_unavailable ();
  
    for (jerry_context_data_header_t *this_p = JERRY_CONTEXT (context_data_p), *next_p = NULL;
         this_p != NULL;
         this_p = next_p)
    {
      next_p = this_p->next_p;
      if (this_p->manager_p->finalize_cb)
      {
        this_p->manager_p->finalize_cb (JERRY_CONTEXT_DATA_HEADER_USER_DATA (this_p));
      }
      jmem_heap_free_block (this_p, sizeof (jerry_context_data_header_t) + this_p->manager_p->bytes_needed);
    }
  
    jmem_finalize ();
  } /* jerry_cleanup */
  
  /**
   * Retrieve a context data item, or create a new one.
   *
   * @param manager_p pointer to the manager whose context data item should be returned.
   *
   * @return a pointer to the user-provided context-specific data item for the given manager, creating such a pointer if
   * none was found.
   */
  void *
  jerry_get_context_data (const jerry_context_data_manager_t *manager_p)
  {
    void *ret = NULL;
    jerry_context_data_header_t *item_p;
  
    for (item_p = JERRY_CONTEXT (context_data_p); item_p != NULL; item_p = item_p->next_p)
    {
      if (item_p->manager_p == manager_p)
      {
        return JERRY_CONTEXT_DATA_HEADER_USER_DATA (item_p);
      }
    }
  
    item_p = jmem_heap_alloc_block (sizeof (jerry_context_data_header_t) + manager_p->bytes_needed);
    item_p->manager_p = manager_p;
    item_p->next_p = JERRY_CONTEXT (context_data_p);
    JERRY_CONTEXT (context_data_p) = item_p;
    ret = JERRY_CONTEXT_DATA_HEADER_USER_DATA (item_p);
  
    memset (ret, 0, manager_p->bytes_needed);
    if (manager_p->init_cb)
    {
      manager_p->init_cb (ret);
    }
  
    return ret;
  } /* jerry_get_context_data */
  
  /**
   * Register external magic string array
   */
  void
  jerry_register_magic_strings (const jerry_char_t * const *ex_str_items_p, /**< character arrays, representing
                                                                             *   external magic strings' contents */
                                uint32_t count, /**< number of the strings */
                                const jerry_length_t *str_lengths_p) /**< lengths of all strings */
  {
    jerry_assert_api_available ();
  
    lit_magic_strings_ex_set ((const lit_utf8_byte_t * const *) ex_str_items_p,
                              count,
                              (const lit_utf8_size_t *) str_lengths_p);
  } /* jerry_register_magic_strings */
  
  /**
   * Run garbage collection
   */
  void
  jerry_gc (jerry_gc_mode_t mode) /**< operational mode */
  {
    jerry_assert_api_available ();
  
    if (mode == JERRY_GC_PRESSURE_LOW)
    {
      /* Call GC directly, because 'ecma_free_unused_memory' might decide it's not yet worth it. */
      ecma_gc_run ();
      return;
    }
  
    ecma_free_unused_memory (JMEM_PRESSURE_HIGH);
  } /* jerry_gc */
  
  /**
   * Get heap memory stats.
   *
   * @return true - get the heap stats successful
   *         false - otherwise. Usually it is because the MEM_STATS feature is not enabled.
   */
  bool
  jerry_get_memory_stats (jerry_heap_stats_t *out_stats_p) /**< [out] heap memory stats */
  {
  #if ENABLED (JERRY_MEM_STATS)
    if (out_stats_p == NULL)
    {
      return false;
    }
  
    jmem_heap_stats_t jmem_heap_stats;
    memset (&jmem_heap_stats, 0, sizeof (jmem_heap_stats));
    jmem_heap_get_stats (&jmem_heap_stats);
  
    *out_stats_p = (jerry_heap_stats_t)
    {
      .version = 1,
      .size = jmem_heap_stats.size,
      .allocated_bytes = jmem_heap_stats.allocated_bytes,
      .peak_allocated_bytes = jmem_heap_stats.peak_allocated_bytes
    };
  
    return true;
  #else /* !ENABLED (JERRY_MEM_STATS) */
    JERRY_UNUSED (out_stats_p);
    return false;
  #endif /* ENABLED (JERRY_MEM_STATS) */
  } /* jerry_get_memory_stats */
  
  /**
   * Simple Jerry runner
   *
   * @return true  - if run was successful
   *         false - otherwise
   */
  bool
  jerry_run_simple (const jerry_char_t *script_source_p, /**< script source */
                    size_t script_source_size, /**< script source size */
                    jerry_init_flag_t flags) /**< combination of Jerry flags */
  {
    bool result = false;
  
    jerry_init (flags);
  
    jerry_value_t parse_ret_val = jerry_parse (NULL, 0, script_source_p, script_source_size, JERRY_PARSE_NO_OPTS);
  
    if (!ecma_is_value_error_reference (parse_ret_val))
    {
      jerry_value_t run_ret_val = jerry_run (parse_ret_val);
  
      if (!ecma_is_value_error_reference (run_ret_val))
      {
        result = true;
      }
  
      jerry_release_value (run_ret_val);
    }
  
    jerry_release_value (parse_ret_val);
    jerry_cleanup ();
  
    return result;
  } /* jerry_run_simple */
  
  /**
   * Parse script and construct an EcmaScript function. The lexical
   * environment is set to the global lexical environment.
   *
   * @return function object value - if script was parsed successfully,
   *         thrown error - otherwise
   */
  jerry_value_t
  jerry_parse (const jerry_char_t *resource_name_p, /**< resource name (usually a file name) */
               size_t resource_name_length, /**< length of resource name */
               const jerry_char_t *source_p, /**< script source */
               size_t source_size, /**< script source size */
               uint32_t parse_opts) /**< jerry_parse_opts_t option bits */
  {
  #if ENABLED (JERRY_DEBUGGER) && ENABLED (JERRY_PARSER)
    if ((JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
        && resource_name_length > 0)
    {
      jerry_debugger_send_string (JERRY_DEBUGGER_SOURCE_CODE_NAME,
                                  JERRY_DEBUGGER_NO_SUBTYPE,
                                  resource_name_p,
                                  resource_name_length);
    }
  #else /* !(ENABLED (JERRY_DEBUGGER) && ENABLED (JERRY_PARSER)) */
    JERRY_UNUSED (resource_name_p);
    JERRY_UNUSED (resource_name_length);
  #endif /* ENABLED (JERRY_DEBUGGER) && ENABLED (JERRY_PARSER) */
  
  #if ENABLED (JERRY_PARSER)
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ERROR_MESSAGES) || ENABLED (JERRY_ES2015_MODULE_SYSTEM)
    if (resource_name_length == 0)
    {
      JERRY_CONTEXT (resource_name) = ecma_make_magic_string_value (LIT_MAGIC_STRING_RESOURCE_ANON);
    }
    else
    {
      JERRY_CONTEXT (resource_name) = ecma_find_or_create_literal_string (resource_name_p,
                                                                          (lit_utf8_size_t) resource_name_length);
    }
  #endif /* ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ERROR_MESSAGES) || ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
  
    ecma_compiled_code_t *bytecode_data_p;
    ecma_value_t parse_status;
  
    parse_status = parser_parse_script (NULL,
                                        0,
                                        source_p,
                                        source_size,
                                        parse_opts,
                                        &bytecode_data_p);
  
    if (ECMA_IS_VALUE_ERROR (parse_status))
    {
      return ecma_create_error_reference_from_context ();
    }
  
    ecma_free_value (parse_status);
  
    ecma_object_t *lex_env_p = ecma_get_global_environment ();
    ecma_object_t *func_obj_p = ecma_op_create_function_object (lex_env_p,
                                                                bytecode_data_p);
    ecma_bytecode_deref (bytecode_data_p);
  
    return ecma_make_object_value (func_obj_p);
  #else /* !ENABLED (JERRY_PARSER) */
    JERRY_UNUSED (source_p);
    JERRY_UNUSED (source_size);
    JERRY_UNUSED (parse_opts);
  
    return jerry_throw (ecma_raise_syntax_error (ECMA_ERR_MSG ("The parser has been disabled.")));
  #endif /* ENABLED (JERRY_PARSER) */
  } /* jerry_parse */
  
  /**
   * Parse function and construct an EcmaScript function. The lexical
   * environment is set to the global lexical environment.
   *
   * @return function object value - if script was parsed successfully,
   *         thrown error - otherwise
   */
  jerry_value_t
  jerry_parse_function (const jerry_char_t *resource_name_p, /**< resource name (usually a file name) */
                        size_t resource_name_length, /**< length of resource name */
                        const jerry_char_t *arg_list_p, /**< script source */
                        size_t arg_list_size, /**< script source size */
                        const jerry_char_t *source_p, /**< script source */
                        size_t source_size, /**< script source size */
                        uint32_t parse_opts) /**< jerry_parse_opts_t option bits */
  {
  #if ENABLED (JERRY_DEBUGGER) && ENABLED (JERRY_PARSER)
    if (JERRY_CONTEXT (debugger_flags) & JERRY_DEBUGGER_CONNECTED)
    {
      jerry_debugger_send_string (JERRY_DEBUGGER_SOURCE_CODE_NAME,
                                  JERRY_DEBUGGER_NO_SUBTYPE,
                                  resource_name_p,
                                  resource_name_length);
    }
  #else /* !(ENABLED (JERRY_DEBUGGER) && ENABLED (JERRY_PARSER)) */
    JERRY_UNUSED (resource_name_p);
    JERRY_UNUSED (resource_name_length);
  #endif /* ENABLED (JERRY_DEBUGGER) && ENABLED (JERRY_PARSER) */
  
  #if ENABLED (JERRY_PARSER)
    jerry_assert_api_available ();
  
    ecma_compiled_code_t *bytecode_data_p;
    ecma_value_t parse_status;
  
  #if ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ERROR_MESSAGES) || ENABLED (JERRY_ES2015_MODULE_SYSTEM)
    if (resource_name_length == 0)
    {
      JERRY_CONTEXT (resource_name) = ecma_make_magic_string_value (LIT_MAGIC_STRING_RESOURCE_ANON);
    }
    else
    {
      JERRY_CONTEXT (resource_name) = ecma_find_or_create_literal_string (resource_name_p,
                                                                          (lit_utf8_size_t) resource_name_length);
    }
  #endif /* ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ERROR_MESSAGES) || ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
  
    if (arg_list_p == NULL)
    {
      /* Must not be a NULL value. */
      arg_list_p = (const jerry_char_t *) "";
    }
  
    parse_status = parser_parse_script (arg_list_p,
                                        arg_list_size,
                                        source_p,
                                        source_size,
                                        parse_opts,
                                        &bytecode_data_p);
  
    if (ECMA_IS_VALUE_ERROR (parse_status))
    {
      return ecma_create_error_reference_from_context ();
    }
  
    ecma_free_value (parse_status);
  
    ecma_object_t *lex_env_p = ecma_get_global_environment ();
    ecma_object_t *func_obj_p = ecma_op_create_function_object (lex_env_p,
                                                                bytecode_data_p);
    ecma_bytecode_deref (bytecode_data_p);
  
    return ecma_make_object_value (func_obj_p);
  #else /* !ENABLED (JERRY_PARSER) */
    JERRY_UNUSED (arg_list_p);
    JERRY_UNUSED (arg_list_size);
    JERRY_UNUSED (source_p);
    JERRY_UNUSED (source_size);
    JERRY_UNUSED (parse_opts);
  
    return jerry_throw (ecma_raise_syntax_error (ECMA_ERR_MSG ("The parser has been disabled.")));
  #endif /* ENABLED (JERRY_PARSER) */
  } /* jerry_parse_function */
  
  /**
   * Run an EcmaScript function created by jerry_parse.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return result of bytecode - if run was successful
   *         thrown error - otherwise
   */
  jerry_value_t
  jerry_run (const jerry_value_t func_val) /**< function to run */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (func_val))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    ecma_object_t *func_obj_p = ecma_get_object_from_value (func_val);
  
    if (ecma_get_object_type (func_obj_p) != ECMA_OBJECT_TYPE_FUNCTION
        || ecma_get_object_is_builtin (func_obj_p))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) func_obj_p;
  
    ecma_object_t *scope_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_object_t,
                                                              ext_func_p->u.function.scope_cp);
  
    if (scope_p != ecma_get_global_environment ())
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    return jerry_return (vm_run_global (ecma_op_function_get_compiled_code (ext_func_p)));
  } /* jerry_run */
  
  /**
   * Perform eval
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return result of eval, may be error value.
   */
  jerry_value_t
  jerry_eval (const jerry_char_t *source_p, /**< source code */
              size_t source_size, /**< length of source code */
              uint32_t parse_opts) /**< jerry_parse_opts_t option bits */
  {
    jerry_assert_api_available ();
  
    return jerry_return (ecma_op_eval_chars_buffer ((const lit_utf8_byte_t *) source_p,
                                                    source_size,
                                                    parse_opts));
  } /* jerry_eval */
  
  /**
   * Run enqueued Promise jobs until the first thrown error or until all get executed.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return result of last executed job, may be error value.
   */
  jerry_value_t
  jerry_run_all_enqueued_jobs (void)
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
    return ecma_process_all_enqueued_jobs ();
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
    return ECMA_VALUE_UNDEFINED;
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
  } /* jerry_run_all_enqueued_jobs */
  
  /**
   * Get global object
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return api value of global object
   */
  jerry_value_t
  jerry_get_global_object (void)
  {
    jerry_assert_api_available ();
    ecma_object_t *global_obj_p = ecma_builtin_get_global ();
    ecma_ref_object (global_obj_p);
    return ecma_make_object_value (global_obj_p);
  } /* jerry_get_global_object */
  
  /**
   * Check if the specified value is an abort value.
   *
   * @return true  - if both the error and abort values are set,
   *         false - otherwise
   */
  bool
  jerry_value_is_abort (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_error_reference (value))
    {
      return false;
    }
  
    ecma_error_reference_t *error_ref_p = ecma_get_error_reference_from_value (value);
  
    return (error_ref_p->refs_and_flags & ECMA_ERROR_REF_ABORT) != 0;
  } /* jerry_value_is_abort */
  
  /**
   * Check if the specified value is an array object value.
   *
   * @return true  - if the specified value is an array object,
   *         false - otherwise
   */
  bool
  jerry_value_is_array (const jerry_value_t value) /**< jerry api value */
  {
    jerry_assert_api_available ();
  
    return (ecma_is_value_object (value)
            && ecma_get_object_type (ecma_get_object_from_value (value)) == ECMA_OBJECT_TYPE_ARRAY);
  } /* jerry_value_is_array */
  
  /**
   * Check if the specified value is boolean.
   *
   * @return true  - if the specified value is boolean,
   *         false - otherwise
   */
  bool
  jerry_value_is_boolean (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    return ecma_is_value_boolean (value);
  } /* jerry_value_is_boolean */
  
  /**
   * Check if the specified value is a constructor function object value.
   *
   * @return true - if the specified value is a function value that implements [[Construct]],
   *         false - otherwise
   */
  bool
  jerry_value_is_constructor (const jerry_value_t value) /**< jerry api value */
  {
    jerry_assert_api_available ();
  
    return ecma_is_constructor (value);
  } /* jerry_value_is_constructor */
  
  /**
   * Check if the specified value is an error or abort value.
   *
   * @return true  - if the specified value is an error value,
   *         false - otherwise
   */
  bool
  jerry_value_is_error (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    return ecma_is_value_error_reference (value);
  } /* jerry_value_is_error */
  
  /**
   * Check if the specified value is a function object value.
   *
   * @return true - if the specified value is callable,
   *         false - otherwise
   */
  bool
  jerry_value_is_function (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    return ecma_op_is_callable (value);
  } /* jerry_value_is_function */
  
  /**
   * Check if the specified value is number.
   *
   * @return true  - if the specified value is number,
   *         false - otherwise
   */
  bool
  jerry_value_is_number (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    return ecma_is_value_number (value);
  } /* jerry_value_is_number */
  
  /**
   * Check if the specified value is null.
   *
   * @return true  - if the specified value is null,
   *         false - otherwise
   */
  bool
  jerry_value_is_null (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    return ecma_is_value_null (value);
  } /* jerry_value_is_null */
  
  /**
   * Check if the specified value is object.
   *
   * @return true  - if the specified value is object,
   *         false - otherwise
   */
  bool
  jerry_value_is_object (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    return ecma_is_value_object (value);
  } /* jerry_value_is_object */
  
  /**
   * Check if the specified value is promise.
   *
   * @return true  - if the specified value is promise,
   *         false - otherwise
   */
  bool
  jerry_value_is_promise (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  #if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
    return (ecma_is_value_object (value)
            && ecma_is_promise (ecma_get_object_from_value (value)));
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
    JERRY_UNUSED (value);
    return false;
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
  } /* jerry_value_is_promise */
  
  /**
   * Check if the specified value is string.
   *
   * @return true  - if the specified value is string,
   *         false - otherwise
   */
  bool
  jerry_value_is_string (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    return ecma_is_value_string (value);
  } /* jerry_value_is_string */
  
  /**
   * Check if the specified value is symbol.
   *
   * @return true  - if the specified value is symbol,
   *         false - otherwise
   */
  bool
  jerry_value_is_symbol (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_SYMBOL)
    return ecma_is_value_symbol (value);
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_SYMBOL) */
    JERRY_UNUSED (value);
    return false;
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_SYMBOL) */
  } /* jerry_value_is_symbol */
  
  /**
   * Check if the specified value is undefined.
   *
   * @return true  - if the specified value is undefined,
   *         false - otherwise
   */
  bool
  jerry_value_is_undefined (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    return ecma_is_value_undefined (value);
  } /* jerry_value_is_undefined */
  
  /**
   * Perform the base type of the JavaScript value.
   *
   * @return jerry_type_t value
   */
  jerry_type_t
  jerry_value_get_type (const jerry_value_t value) /**< input value to check */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (value))
    {
      return JERRY_TYPE_ERROR;
    }
  
    lit_magic_string_id_t lit_id = ecma_get_typeof_lit_id (value);
  
    JERRY_ASSERT (lit_id != LIT_MAGIC_STRING__EMPTY);
  
    switch (lit_id)
    {
      case LIT_MAGIC_STRING_UNDEFINED:
      {
        return JERRY_TYPE_UNDEFINED;
      }
      case LIT_MAGIC_STRING_BOOLEAN:
      {
        return JERRY_TYPE_BOOLEAN;
      }
      case LIT_MAGIC_STRING_NUMBER:
      {
        return JERRY_TYPE_NUMBER;
      }
      case LIT_MAGIC_STRING_STRING:
      {
        return JERRY_TYPE_STRING;
      }
  #if ENABLED (JERRY_ES2015_BUILTIN_SYMBOL)
      case LIT_MAGIC_STRING_SYMBOL:
      {
        return JERRY_TYPE_SYMBOL;
      }
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_SYMBOL) */
      case LIT_MAGIC_STRING_FUNCTION:
      {
        return JERRY_TYPE_FUNCTION;
      }
      default:
      {
        JERRY_ASSERT (lit_id == LIT_MAGIC_STRING_OBJECT);
  
        /* Based on the ECMA 262 5.1 standard the 'null' value is an object.
         * Thus we'll do an extra check for 'null' here.
         */
        return ecma_is_value_null (value) ? JERRY_TYPE_NULL : JERRY_TYPE_OBJECT;
      }
    }
  } /* jerry_value_get_type */
  
  /**
   * Check if the specified feature is enabled.
   *
   * @return true  - if the specified feature is enabled,
   *         false - otherwise
   */
  bool
  jerry_is_feature_enabled (const jerry_feature_t feature) /**< feature to check */
  {
    JERRY_ASSERT (feature < JERRY_FEATURE__COUNT);
  
    return (false
  #if ENABLED (JERRY_CPOINTER_32_BIT)
            || feature == JERRY_FEATURE_CPOINTER_32_BIT
  #endif /* ENABLED (JERRY_CPOINTER_32_BIT) */
  #if ENABLED (JERRY_ERROR_MESSAGES)
            || feature == JERRY_FEATURE_ERROR_MESSAGES
  #endif /* ENABLED (JERRY_ERROR_MESSAGES) */
  #if ENABLED (JERRY_PARSER)
            || feature == JERRY_FEATURE_JS_PARSER
  #endif /* ENABLED (JERRY_PARSER) */
  #if ENABLED (JERRY_MEM_STATS)
            || feature == JERRY_FEATURE_MEM_STATS
  #endif /* ENABLED (JERRY_MEM_STATS) */
  #if ENABLED (JERRY_PARSER_DUMP_BYTE_CODE)
            || feature == JERRY_FEATURE_PARSER_DUMP
  #endif /* ENABLED (JERRY_PARSER_DUMP_BYTE_CODE) */
  #if ENABLED (JERRY_REGEXP_DUMP_BYTE_CODE)
            || feature == JERRY_FEATURE_REGEXP_DUMP
  #endif /* ENABLED (JERRY_REGEXP_DUMP_BYTE_CODE) */
  #if ENABLED (JERRY_SNAPSHOT_SAVE)
            || feature == JERRY_FEATURE_SNAPSHOT_SAVE
  #endif /* ENABLED (JERRY_SNAPSHOT_SAVE) */
  #if ENABLED (JERRY_SNAPSHOT_EXEC)
            || feature == JERRY_FEATURE_SNAPSHOT_EXEC
  #endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
  #if ENABLED (JERRY_DEBUGGER)
            || feature == JERRY_FEATURE_DEBUGGER
  #endif /* ENABLED (JERRY_DEBUGGER) */
  #if ENABLED (JERRY_VM_EXEC_STOP)
            || feature == JERRY_FEATURE_VM_EXEC_STOP
  #endif /* ENABLED (JERRY_VM_EXEC_STOP) */
  #if ENABLED (JERRY_BUILTIN_JSON)
            || feature == JERRY_FEATURE_JSON
  #endif /* ENABLED (JERRY_BUILTIN_JSON) */
  #if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
            || feature == JERRY_FEATURE_PROMISE
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
  #if ENABLED (JERRY_ES2015_BUILTIN_SYMBOL)
            || feature == JERRY_FEATURE_SYMBOL
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_SYMBOL) */
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
            || feature == JERRY_FEATURE_TYPEDARRAY
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  #if ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW)
            || feature == JERRY_FEATURE_DATAVIEW
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW) */
  #if ENABLED (JERRY_BUILTIN_DATE)
            || feature == JERRY_FEATURE_DATE
  #endif /* ENABLED (JERRY_BUILTIN_DATE) */
  #if ENABLED (JERRY_BUILTIN_REGEXP)
            || feature == JERRY_FEATURE_REGEXP
  #endif /* ENABLED (JERRY_BUILTIN_REGEXP) */
  #if ENABLED (JERRY_LINE_INFO)
            || feature == JERRY_FEATURE_LINE_INFO
  #endif /* ENABLED (JERRY_LINE_INFO) */
  #if ENABLED (JERRY_LOGGING)
            || feature == JERRY_FEATURE_LOGGING
  #endif /* ENABLED (JERRY_LOGGING) */
            );
  } /* jerry_is_feature_enabled */
  
  /**
   * Perform binary operation on the given operands (==, ===, <, >, etc.).
   *
   * @return error - if argument has an error flag or operation is unsuccessful or unsupported
   *         true/false - the result of the binary operation on the given operands otherwise
   */
  jerry_value_t
  jerry_binary_operation (jerry_binary_operation_t op, /**< operation */
                          const jerry_value_t lhs, /**< first operand */
                          const jerry_value_t rhs) /**< second operand */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (lhs) || ecma_is_value_error_reference (rhs))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (error_value_msg_p)));
    }
  
    switch (op)
    {
      case JERRY_BIN_OP_EQUAL:
      {
        return jerry_return (ecma_op_abstract_equality_compare (lhs, rhs));
      }
      case JERRY_BIN_OP_STRICT_EQUAL:
      {
        return ecma_make_boolean_value (ecma_op_strict_equality_compare (lhs, rhs));
      }
      case JERRY_BIN_OP_LESS:
      {
        return jerry_return (opfunc_relation (lhs, rhs, true, false));
      }
      case JERRY_BIN_OP_LESS_EQUAL:
      {
        return jerry_return (opfunc_relation (lhs, rhs, false, true));
      }
      case JERRY_BIN_OP_GREATER:
      {
        return jerry_return (opfunc_relation (lhs, rhs, false, false));
      }
      case JERRY_BIN_OP_GREATER_EQUAL:
      {
        return jerry_return (opfunc_relation (lhs, rhs, true, true));
      }
      case JERRY_BIN_OP_INSTANCEOF:
      {
        if (!ecma_is_value_object (lhs)
            || !ecma_op_is_callable (rhs))
        {
          return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
        }
  
        ecma_object_t *proto_obj_p = ecma_get_object_from_value (rhs);
        return jerry_return (ecma_op_object_has_instance (proto_obj_p, lhs));
      }
      default:
      {
        return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Unsupported binary operation")));
      }
    }
  } /* jerry_binary_operation */
  
  /**
   * Create abort from an api value.
   *
   * Create abort value from an api value. If the second argument is true
   * it will release the input api value.
   *
   * @return api abort value
   */
  jerry_value_t
  jerry_create_abort_from_value (jerry_value_t value, /**< api value */
                                 bool release) /**< release api value */
  {
    jerry_assert_api_available ();
  
    if (JERRY_UNLIKELY (ecma_is_value_error_reference (value)))
    {
      /* This is a rare case so it is optimized for
       * binary size rather than performance. */
      if (jerry_value_is_abort (value))
      {
        return release ? value : jerry_acquire_value (value);
      }
  
      value = jerry_get_value_from_error (value, release);
      release = true;
    }
  
    if (!release)
    {
      value = ecma_copy_value (value);
    }
  
    return ecma_create_error_reference (value, false);
  } /* jerry_create_abort_from_value */
  
  /**
   * Create error from an api value.
   *
   * Create error value from an api value. If the second argument is true
   * it will release the input api value.
   *
   * @return api error value
   */
  jerry_value_t
  jerry_create_error_from_value (jerry_value_t value, /**< api value */
                                 bool release) /**< release api value */
  {
    jerry_assert_api_available ();
  
    if (JERRY_UNLIKELY (ecma_is_value_error_reference (value)))
    {
      /* This is a rare case so it is optimized for
       * binary size rather than performance. */
      if (!jerry_value_is_abort (value))
      {
        return release ? value : jerry_acquire_value (value);
      }
  
      value = jerry_get_value_from_error (value, release);
      release = true;
    }
  
    if (!release)
    {
      value = ecma_copy_value (value);
    }
  
    return ecma_create_error_reference (value, true);
  } /* jerry_create_error_from_value */
  
  /**
   * Get the value from an error value.
   *
   * Extract the api value from an error. If the second argument is true
   * it will release the input error value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return jerry_value_t value
   */
  jerry_value_t
  jerry_get_value_from_error (jerry_value_t value, /**< api value */
                              bool release) /**< release api value */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_error_reference (value))
    {
      return release ? value : ecma_copy_value (value);
    }
  
    jerry_value_t ret_val = jerry_acquire_value (ecma_get_error_reference_from_value (value)->value);
  
    if (release)
    {
      jerry_release_value (value);
    }
    return ret_val;
  } /* jerry_get_value_from_error */
  
  /**
   * Return the type of the Error object if possible.
   *
   * @return one of the jerry_error_t value as the type of the Error object
   *         JERRY_ERROR_NONE - if the input value is not an Error object
   */
  jerry_error_t
  jerry_get_error_type (jerry_value_t value) /**< api value */
  {
    if (JERRY_UNLIKELY (ecma_is_value_error_reference (value)))
    {
      value = ecma_get_error_reference_from_value (value)->value;
    }
  
    if (!ecma_is_value_object (value))
    {
      return JERRY_ERROR_NONE;
    }
  
    ecma_object_t *object_p = ecma_get_object_from_value (value);
    ecma_standard_error_t error_type = ecma_get_error_type (object_p);
  
    return (jerry_error_t) error_type;
  } /* jerry_get_error_type */
  
  /**
   * Get boolean from the specified value.
   *
   * @return true or false.
   */
  bool
  jerry_get_boolean_value (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    return ecma_is_value_true (value);
  } /* jerry_get_boolean_value */
  
  /**
   * Get number from the specified value as a double.
   *
   * @return stored number as double
   */
  double
  jerry_get_number_value (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_number (value))
    {
      return 0;
    }
  
    return (double) ecma_get_number_from_value (value);
  } /* jerry_get_number_value */
  
  /**
   * Call ToBoolean operation on the api value.
   *
   * @return true  - if the logical value is true
   *         false - otherwise
   */
  bool
  jerry_value_to_boolean (const jerry_value_t value) /**< input value */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (value))
    {
      return false;
    }
  
    return ecma_op_to_boolean (value);
  } /* jerry_value_to_boolean */
  
  /**
   * Call ToNumber operation on the api value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return converted number value - if success
   *         thrown error - otherwise
   */
  jerry_value_t
  jerry_value_to_number (const jerry_value_t value) /**< input value */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (value))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (error_value_msg_p)));
    }
  
    return jerry_return (ecma_op_to_number (value));
  } /* jerry_value_to_number */
  
  /**
   * Call ToObject operation on the api value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return converted object value - if success
   *         thrown error - otherwise
   */
  jerry_value_t
  jerry_value_to_object (const jerry_value_t value) /**< input value */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (value))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (error_value_msg_p)));
    }
  
    return jerry_return (ecma_op_to_object (value));
  } /* jerry_value_to_object */
  
  /**
   * Call ToPrimitive operation on the api value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return converted primitive value - if success
   *         thrown error - otherwise
   */
  jerry_value_t
  jerry_value_to_primitive (const jerry_value_t value) /**< input value */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (value))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (error_value_msg_p)));
    }
  
    return jerry_return (ecma_op_to_primitive (value, ECMA_PREFERRED_TYPE_NO));
  } /* jerry_value_to_primitive */
  
  /**
   * Call the ToString ecma builtin operation on the api value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return converted string value - if success
   *         thrown error - otherwise
   */
  jerry_value_t
  jerry_value_to_string (const jerry_value_t value) /**< input value */
  {
  
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (value))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (error_value_msg_p)));
    }
  
    return jerry_return (ecma_op_to_string (value));
  } /* jerry_value_to_string */
  
  /**
   * Acquire specified Jerry API value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return acquired api value
   */
  jerry_value_t
  jerry_acquire_value (jerry_value_t value) /**< API value */
  {
    jerry_assert_api_available ();
  
    if (JERRY_UNLIKELY (ecma_is_value_error_reference (value)))
    {
      ecma_ref_error_reference (ecma_get_error_reference_from_value (value));
      return value;
    }
  
    return ecma_copy_value (value);
  } /* jerry_acquire_value */
  
  /**
   * Release specified Jerry API value
   */
  void
  jerry_release_value (jerry_value_t value) /**< API value */
  {
    jerry_assert_api_available ();
  
    if (JERRY_UNLIKELY (ecma_is_value_error_reference (value)))
    {
      ecma_deref_error_reference (ecma_get_error_reference_from_value (value));
      return;
    }
  
    ecma_free_value (value);
  } /* jerry_release_value */
  
  /**
   * Create an array object value
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return value of the constructed array object
   */
  jerry_value_t
  jerry_create_array (uint32_t size) /**< size of array */
  {
    jerry_assert_api_available ();
  
    ecma_value_t array_length = ecma_make_uint32_value (size);
  
    const jerry_length_t argument_size = 1;
    ecma_value_t array_value = ecma_op_create_array_object (&array_length, argument_size, true);
    ecma_free_value (array_length);
  
    JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (array_value));
  
    return array_value;
  } /* jerry_create_array */
  
  /**
   * Create a jerry_value_t representing a boolean value from the given boolean parameter.
   *
   * @return value of the created boolean
   */
  jerry_value_t
  jerry_create_boolean (bool value) /**< bool value from which a jerry_value_t will be created */
  {
    jerry_assert_api_available ();
  
    return jerry_return (ecma_make_boolean_value (value));
  } /* jerry_create_boolean */
  
  /**
   * Create an error object
   *
   * Note:
   *      - returned value must be freed with jerry_release_value, when it is no longer needed
   *      - the error flag is set for the returned value
   *
   * @return value of the constructed error object
   */
  jerry_value_t
  jerry_create_error (jerry_error_t error_type, /**< type of error */
                      const jerry_char_t *message_p) /**< value of 'message' property
                                                      *   of constructed error object */
  {
    return jerry_create_error_sz (error_type,
                                  (lit_utf8_byte_t *) message_p,
                                  lit_zt_utf8_string_size (message_p));
  } /* jerry_create_error */
  
  /**
   * Create an error object
   *
   * Note:
   *      - returned value must be freed with jerry_release_value, when it is no longer needed
   *      - the error flag is set for the returned value
   *
   * @return value of the constructed error object
   */
  jerry_value_t
  jerry_create_error_sz (jerry_error_t error_type, /**< type of error */
                         const jerry_char_t *message_p, /**< value of 'message' property
                                                         *   of constructed error object */
                         jerry_size_t message_size) /**< size of the message in bytes */
  {
    jerry_assert_api_available ();
  
    if (message_p == NULL || message_size == 0)
    {
      return ecma_create_error_object_reference (ecma_new_standard_error ((ecma_standard_error_t) error_type));
    }
    else
    {
      ecma_string_t *message_string_p = ecma_new_ecma_string_from_utf8 ((lit_utf8_byte_t *) message_p,
                                                                        (lit_utf8_size_t) message_size);
  
      ecma_object_t *error_object_p = ecma_new_standard_error_with_message ((ecma_standard_error_t) error_type,
                                                                            message_string_p);
  
      ecma_deref_ecma_string (message_string_p);
  
      return ecma_create_error_object_reference (error_object_p);
    }
  } /* jerry_create_error_sz */
  
  /**
   * Create an external function object
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return value of the constructed function object
   */
  jerry_value_t
  jerry_create_external_function (jerry_external_handler_t handler_p) /**< pointer to native handler
                                                                       *   for the function */
  {
    jerry_assert_api_available ();
  
    ecma_object_t *func_obj_p = ecma_op_create_external_function_object (handler_p);
    return ecma_make_object_value (func_obj_p);
  } /* jerry_create_external_function */
  
  /**
   * Creates a jerry_value_t representing a number value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return jerry_value_t created from the given double argument.
   */
  jerry_value_t
  jerry_create_number (double value) /**< double value from which a jerry_value_t will be created */
  {
    jerry_assert_api_available ();
  
    return ecma_make_number_value ((ecma_number_t) value);
  } /* jerry_create_number */
  
  /**
   * Creates a jerry_value_t representing a positive or negative infinity value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return jerry_value_t representing an infinity value.
   */
  jerry_value_t
  jerry_create_number_infinity (bool sign) /**< true for negative Infinity
                                            *   false for positive Infinity */
  {
    jerry_assert_api_available ();
  
    return ecma_make_number_value (ecma_number_make_infinity (sign));
  } /* jerry_create_number_infinity */
  
  /**
   * Creates a jerry_value_t representing a not-a-number value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return jerry_value_t representing a not-a-number value.
   */
  jerry_value_t
  jerry_create_number_nan (void)
  {
    jerry_assert_api_available ();
  
    return ecma_make_nan_value ();
  } /* jerry_create_number_nan */
  
  /**
   * Creates a jerry_value_t representing an undefined value.
   *
   * @return value of undefined
   */
  jerry_value_t
  jerry_create_undefined (void)
  {
    jerry_assert_api_available ();
  
    return ECMA_VALUE_UNDEFINED;
  } /* jerry_create_undefined */
  
  /**
   * Creates and returns a jerry_value_t with type null object.
   *
   * @return jerry_value_t representing null
   */
  jerry_value_t
  jerry_create_null (void)
  {
    jerry_assert_api_available ();
  
    return ECMA_VALUE_NULL;
  } /* jerry_create_null */
  
  /**
   * Create new JavaScript object, like with new Object().
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return value of the created object
   */
  jerry_value_t
  jerry_create_object (void)
  {
    jerry_assert_api_available ();
  
    return ecma_make_object_value (ecma_op_create_object_object_noarg ());
  } /* jerry_create_object */
  
  /**
   * Create an empty Promise object which can be resolve/reject later
   * by calling jerry_resolve_or_reject_promise.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return value of the created object
   */
  jerry_value_t
  jerry_create_promise (void)
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
    return ecma_op_create_promise_object (ECMA_VALUE_EMPTY, ECMA_PROMISE_EXECUTOR_EMPTY);
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Promise not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
  } /* jerry_create_promise */
  
  /**
   * Create string from a valid UTF-8 string
   *
   * Note:
   *      returned value must be freed with jerry_release_value when it is no longer needed.
   *
   * @return value of the created string
   */
  jerry_value_t
  jerry_create_string_from_utf8 (const jerry_char_t *str_p) /**< pointer to string */
  {
    return jerry_create_string_sz_from_utf8 (str_p, lit_zt_utf8_string_size ((lit_utf8_byte_t *) str_p));
  } /* jerry_create_string_from_utf8 */
  
  /**
   * Create string from a valid UTF-8 string
   *
   * Note:
   *      returned value must be freed with jerry_release_value when it is no longer needed.
   *
   * @return value of the created string
   */
  jerry_value_t
  jerry_create_string_sz_from_utf8 (const jerry_char_t *str_p, /**< pointer to string */
                                    jerry_size_t str_size) /**< string size */
  {
    jerry_assert_api_available ();
  
    ecma_string_t *ecma_str_p = ecma_new_ecma_string_from_utf8_converted_to_cesu8 ((lit_utf8_byte_t *) str_p,
                                                                                   (lit_utf8_size_t) str_size);
  
    return ecma_make_string_value (ecma_str_p);
  } /* jerry_create_string_sz_from_utf8 */
  
  /**
   * Create string from a valid CESU-8 string
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return value of the created string
   */
  jerry_value_t
  jerry_create_string (const jerry_char_t *str_p) /**< pointer to string */
  {
    return jerry_create_string_sz (str_p, lit_zt_utf8_string_size ((lit_utf8_byte_t *) str_p));
  } /* jerry_create_string */
  
  /**
   * Create string from a valid CESU-8 string
   *
   * Note:
   *      returned value must be freed with jerry_release_value when it is no longer needed.
   *
   * @return value of the created string
   */
  jerry_value_t
  jerry_create_string_sz (const jerry_char_t *str_p, /**< pointer to string */
                          jerry_size_t str_size) /**< string size */
  {
    jerry_assert_api_available ();
  
    ecma_string_t *ecma_str_p = ecma_new_ecma_string_from_utf8 ((lit_utf8_byte_t *) str_p,
                                                                (lit_utf8_size_t) str_size);
    return ecma_make_string_value (ecma_str_p);
  } /* jerry_create_string_sz */
  
  /**
   * Create symbol from an api value
   *
   * Note:
   *      The given argument is converted to string. This operation can throw an error.
   *      returned value must be freed with jerry_release_value when it is no longer needed.
   *
   * @return value of the created symbol, if success
   *         thrown error, otherwise
   */
  jerry_value_t
  jerry_create_symbol (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (value))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
  #if ENABLED (JERRY_ES2015_BUILTIN_SYMBOL)
    return jerry_return (ecma_op_create_symbol (&value, 1));
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_SYMBOL) */
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Symbol is not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_SYMBOL) */
  } /* jerry_create_symbol */
  
  /**
   * Calculates the size of the given pattern and creates a RegExp object.
   *
   * @return value of the constructed RegExp object.
   */
  jerry_value_t
  jerry_create_regexp (const jerry_char_t *pattern_p, /**< zero-terminated UTF-8 string as RegExp pattern */
                       uint16_t flags) /**< optional RegExp flags */
  {
    return jerry_create_regexp_sz (pattern_p, lit_zt_utf8_string_size (pattern_p), flags);
  } /* jerry_create_regexp */
  
  /**
   * Creates a RegExp object with the given pattern and flags.
   *
   * @return value of the constructed RegExp object.
   */
  jerry_value_t
  jerry_create_regexp_sz (const jerry_char_t *pattern_p, /**< zero-terminated UTF-8 string as RegExp pattern */
                          jerry_size_t pattern_size, /**< length of the pattern */
                          uint16_t flags) /**< optional RegExp flags */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_BUILTIN_REGEXP)
    if (!lit_is_valid_utf8_string (pattern_p, pattern_size))
    {
      return jerry_throw (ecma_raise_common_error (ECMA_ERR_MSG ("Input must be a valid utf8 string")));
    }
  
    ecma_string_t *ecma_pattern = ecma_new_ecma_string_from_utf8 (pattern_p, pattern_size);
  
    jerry_value_t ret_val = ecma_op_create_regexp_object (ecma_pattern, flags);
  
    ecma_deref_ecma_string (ecma_pattern);
    return ret_val;
  
  #else /* !ENABLED (JERRY_BUILTIN_REGEXP) */
    JERRY_UNUSED (pattern_p);
    JERRY_UNUSED (pattern_size);
    JERRY_UNUSED (flags);
  
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("RegExp is not supported.")));
  #endif /* ENABLED (JERRY_BUILTIN_REGEXP) */
  } /* jerry_create_regexp_sz */
  
  /**
   * Get length of an array object
   *
   * Note:
   *      Returns 0, if the value parameter is not an array object.
   *
   * @return length of the given array
   */
  uint32_t
  jerry_get_array_length (const jerry_value_t value) /**< api value */
  {
    jerry_assert_api_available ();
  
    if (!jerry_value_is_array (value))
    {
      return 0;
    }
  
    ecma_value_t len_value = ecma_op_object_get_by_magic_id (ecma_get_object_from_value (value),
                                                             LIT_MAGIC_STRING_LENGTH);
  
    jerry_length_t length = ecma_number_to_uint32 (ecma_get_number_from_value (len_value));
    ecma_free_value (len_value);
  
    return length;
  } /* jerry_get_array_length */
  
  /**
   * Get size of Jerry string
   *
   * Note:
   *      Returns 0, if the value parameter is not a string.
   *
   * @return number of bytes in the buffer needed to represent the string
   */
  jerry_size_t
  jerry_get_string_size (const jerry_value_t value) /**< input string */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_string (value))
    {
      return 0;
    }
  
    return ecma_string_get_size (ecma_get_string_from_value (value));
  } /* jerry_get_string_size */
  
  /**
   * Get UTF-8 encoded string size from Jerry string
   *
   * Note:
   *      Returns 0, if the value parameter is not a string.
   *
   * @return number of bytes in the buffer needed to represent the UTF-8 encoded string
   */
  jerry_size_t
  jerry_get_utf8_string_size (const jerry_value_t value) /**< input string */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_string (value))
    {
      return 0;
    }
  
    return ecma_string_get_utf8_size (ecma_get_string_from_value (value));
  } /* jerry_get_utf8_string_size */
  
  /**
   * Get length of Jerry string
   *
   * Note:
   *      Returns 0, if the value parameter is not a string.
   *
   * @return number of characters in the string
   */
  jerry_length_t
  jerry_get_string_length (const jerry_value_t value) /**< input string */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_string (value))
    {
      return 0;
    }
  
    return ecma_string_get_length (ecma_get_string_from_value (value));
  } /* jerry_get_string_length */
  
  /**
   * Get UTF-8 string length from Jerry string
   *
   * Note:
   *      Returns 0, if the value parameter is not a string.
   *
   * @return number of characters in the string
   */
  jerry_length_t
  jerry_get_utf8_string_length (const jerry_value_t value) /**< input string */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_string (value))
    {
      return 0;
    }
  
    return ecma_string_get_utf8_length (ecma_get_string_from_value (value));
  } /* jerry_get_utf8_string_length */
  
  /**
   * Copy the characters of a string into a specified buffer.
   *
   * Note:
   *      The '\0' character could occur in character buffer.
   *      Returns 0, if the value parameter is not a string or
   *      the buffer is not large enough for the whole string.
   *
   * Note:
   *      If the size of the string in jerry value is larger than the size of the
   *      target buffer, the copy will fail.
   *      To copy substring use jerry_substring_to_char_buffer() instead.
   *
   * @return number of bytes, actually copied to the buffer.
   */
  jerry_size_t
  jerry_string_to_char_buffer (const jerry_value_t value, /**< input string value */
                               jerry_char_t *buffer_p, /**< [out] output characters buffer */
                               jerry_size_t buffer_size) /**< size of output buffer */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_string (value) || buffer_p == NULL)
    {
      return 0;
    }
  
    ecma_string_t *str_p = ecma_get_string_from_value (value);
  
    if (ecma_string_get_size (str_p) > buffer_size)
    {
      return 0;
    }
  
    return ecma_string_copy_to_cesu8_buffer (str_p,
                                             (lit_utf8_byte_t *) buffer_p,
                                             buffer_size);
  } /* jerry_string_to_char_buffer */
  
  /**
   * Copy the characters of an utf-8 encoded string into a specified buffer.
   *
   * Note:
   *      The '\0' character could occur anywhere in the returned string
   *      Returns 0, if the value parameter is not a string or the buffer
   *      is not large enough for the whole string.
   *
   * Note:
   *      If the size of the string in jerry value is larger than the size of the
   *      target buffer, the copy will fail.
   *      To copy a substring use jerry_substring_to_utf8_char_buffer() instead.
   *
   * @return number of bytes copied to the buffer.
   */
  jerry_size_t
  jerry_string_to_utf8_char_buffer (const jerry_value_t value, /**< input string value */
                                    jerry_char_t *buffer_p, /**< [out] output characters buffer */
                                    jerry_size_t buffer_size) /**< size of output buffer */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_string (value) || buffer_p == NULL)
    {
      return 0;
    }
  
    ecma_string_t *str_p = ecma_get_string_from_value (value);
  
    if (ecma_string_get_utf8_size (str_p) > buffer_size)
    {
      return 0;
    }
  
    return ecma_string_copy_to_utf8_buffer (str_p,
                                            (lit_utf8_byte_t *) buffer_p,
                                            buffer_size);
  } /* jerry_string_to_utf8_char_buffer */
  
  /**
   * Copy the characters of an cesu-8 encoded substring into a specified buffer.
   *
   * Note:
   *      The '\0' character could occur anywhere in the returned string
   *      Returns 0, if the value parameter is not a string.
   *      It will extract the substring beetween the specified start position
   *      and the end position (or the end of the string, whichever comes first).
   *
   * @return number of bytes copied to the buffer.
   */
  jerry_size_t
  jerry_substring_to_char_buffer (const jerry_value_t value, /**< input string value */
                                  jerry_length_t start_pos, /**< position of the first character */
                                  jerry_length_t end_pos, /**< position of the last character */
                                  jerry_char_t *buffer_p, /**< [out] output characters buffer */
                                  jerry_size_t buffer_size) /**< size of output buffer */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_string (value) || buffer_p == NULL)
    {
      return 0;
    }
  
    ecma_string_t *str_p = ecma_get_string_from_value (value);
  
    return ecma_substring_copy_to_cesu8_buffer (str_p,
                                                start_pos,
                                                end_pos,
                                                (lit_utf8_byte_t *) buffer_p,
                                                buffer_size);
  } /* jerry_substring_to_char_buffer */
  
  /**
   * Copy the characters of an utf-8 encoded substring into a specified buffer.
   *
   * Note:
   *      The '\0' character could occur anywhere in the returned string
   *      Returns 0, if the value parameter is not a string.
   *      It will extract the substring beetween the specified start position
   *      and the end position (or the end of the string, whichever comes first).
   *
   * @return number of bytes copied to the buffer.
   */
  jerry_size_t
  jerry_substring_to_utf8_char_buffer (const jerry_value_t value, /**< input string value */
                                       jerry_length_t start_pos, /**< position of the first character */
                                       jerry_length_t end_pos, /**< position of the last character */
                                       jerry_char_t *buffer_p, /**< [out] output characters buffer */
                                       jerry_size_t buffer_size) /**< size of output buffer */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_string (value) || buffer_p == NULL)
    {
      return 0;
    }
  
    ecma_string_t *str_p = ecma_get_string_from_value (value);
  
    return ecma_substring_copy_to_utf8_buffer (str_p,
                                               start_pos,
                                               end_pos,
                                               (lit_utf8_byte_t *) buffer_p,
                                               buffer_size);
  } /* jerry_substring_to_utf8_char_buffer */
  
  /**
   * Checks whether the object or it's prototype objects have the given property.
   *
   * @return true  - if the property exists
   *         false - otherwise
   */
  jerry_value_t
  jerry_has_property (const jerry_value_t obj_val, /**< object value */
                      const jerry_value_t prop_name_val) /**< property name (string value) */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val)
        || !ecma_is_value_prop_name (prop_name_val))
    {
      return ECMA_VALUE_FALSE;
    }
  
    bool has_property = ecma_op_object_has_property (ecma_get_object_from_value (obj_val),
                                                     ecma_get_prop_name_from_value (prop_name_val));
  
    return ecma_make_boolean_value (has_property);
  } /* jerry_has_property */
  
  /**
   * Checks whether the object has the given property.
   *
   * @return true  - if the property exists
   *         false - otherwise
   */
  jerry_value_t
  jerry_has_own_property (const jerry_value_t obj_val, /**< object value */
                          const jerry_value_t prop_name_val) /**< property name (string value) */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val)
        || !ecma_is_value_prop_name (prop_name_val))
    {
      return ECMA_VALUE_FALSE;
    }
  
    bool has_property = ecma_op_object_has_own_property (ecma_get_object_from_value (obj_val),
                                                         ecma_get_prop_name_from_value (prop_name_val));
  
    return ecma_make_boolean_value (has_property);
  } /* jerry_has_own_property */
  
  /**
   * Delete a property from an object.
   *
   * @return true  - if property was deleted successfully
   *         false - otherwise
   */
  bool
  jerry_delete_property (const jerry_value_t obj_val, /**< object value */
                         const jerry_value_t prop_name_val) /**< property name (string value) */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val)
        || !ecma_is_value_prop_name (prop_name_val))
    {
      return false;
    }
  
    ecma_value_t ret_value = ecma_op_object_delete (ecma_get_object_from_value (obj_val),
                                                    ecma_get_prop_name_from_value (prop_name_val),
                                                    false);
    return ecma_is_value_true (ret_value);
  } /* jerry_delete_property */
  
  /**
   * Delete indexed property from the specified object.
   *
   * @return true  - if property was deleted successfully
   *         false - otherwise
   */
  bool
  jerry_delete_property_by_index (const jerry_value_t obj_val, /**< object value */
                                  uint32_t index) /**< index to be written */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val))
    {
      return false;
    }
  
    ecma_string_t *str_idx_p = ecma_new_ecma_string_from_uint32 (index);
    ecma_value_t ret_value = ecma_op_object_delete (ecma_get_object_from_value (obj_val),
                                                    str_idx_p,
                                                    false);
    ecma_deref_ecma_string (str_idx_p);
  
    return ecma_is_value_true (ret_value);
  } /* jerry_delete_property_by_index */
  
  /**
   * Get value of a property to the specified object with the given name.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return value of the property - if success
   *         value marked with error flag - otherwise
   */
  jerry_value_t
  jerry_get_property (const jerry_value_t obj_val, /**< object value */
                      const jerry_value_t prop_name_val) /**< property name (string value) */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val)
        || !ecma_is_value_prop_name (prop_name_val))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    jerry_value_t ret_value = ecma_op_object_get (ecma_get_object_from_value (obj_val),
                                                  ecma_get_prop_name_from_value (prop_name_val));
    return jerry_return (ret_value);
  } /* jerry_get_property */
  
  /**
   * Get value by an index from the specified object.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return value of the property specified by the index - if success
   *         value marked with error flag - otherwise
   */
  jerry_value_t
  jerry_get_property_by_index (const jerry_value_t obj_val, /**< object value */
                               uint32_t index) /**< index to be written */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    ecma_string_t *str_idx_p = ecma_new_ecma_string_from_uint32 (index);
    ecma_value_t ret_value = ecma_op_object_get (ecma_get_object_from_value (obj_val), str_idx_p);
    ecma_deref_ecma_string (str_idx_p);
  
    return jerry_return (ret_value);
  } /* jerry_get_property_by_index */
  
  /**
   * Set a property to the specified object with the given name.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return true value - if the operation was successful
   *         value marked with error flag - otherwise
   */
  jerry_value_t
  jerry_set_property (const jerry_value_t obj_val, /**< object value */
                      const jerry_value_t prop_name_val, /**< property name (string value) */
                      const jerry_value_t value_to_set) /**< value to set */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (value_to_set)
        || !ecma_is_value_object (obj_val)
        || !ecma_is_value_prop_name (prop_name_val))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    return jerry_return (ecma_op_object_put (ecma_get_object_from_value (obj_val),
                                             ecma_get_prop_name_from_value (prop_name_val),
                                             value_to_set,
                                             true));
  } /* jerry_set_property */
  
  /**
   * Set indexed value in the specified object
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return true value - if the operation was successful
   *         value marked with error flag - otherwise
   */
  jerry_value_t
  jerry_set_property_by_index (const jerry_value_t obj_val, /**< object value */
                               uint32_t index, /**< index to be written */
                               const jerry_value_t value_to_set) /**< value to set */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_error_reference (value_to_set)
        || !ecma_is_value_object (obj_val))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    ecma_string_t *str_idx_p = ecma_new_ecma_string_from_uint32 ((uint32_t) index);
    ecma_value_t ret_value = ecma_op_object_put (ecma_get_object_from_value (obj_val),
                                                 str_idx_p,
                                                 value_to_set,
                                                 true);
    ecma_deref_ecma_string (str_idx_p);
  
    return jerry_return (ret_value);
  } /* jerry_set_property_by_index */
  
  /**
   * Initialize property descriptor.
   */
  void
  jerry_init_property_descriptor_fields (jerry_property_descriptor_t *prop_desc_p) /**< [out] property descriptor */
  {
    prop_desc_p->is_value_defined = false;
    prop_desc_p->value = ECMA_VALUE_UNDEFINED;
    prop_desc_p->is_writable_defined = false;
    prop_desc_p->is_writable = false;
    prop_desc_p->is_enumerable_defined = false;
    prop_desc_p->is_enumerable = false;
    prop_desc_p->is_configurable_defined = false;
    prop_desc_p->is_configurable = false;
    prop_desc_p->is_get_defined = false;
    prop_desc_p->getter = ECMA_VALUE_UNDEFINED;
    prop_desc_p->is_set_defined = false;
    prop_desc_p->setter = ECMA_VALUE_UNDEFINED;
  } /* jerry_init_property_descriptor_fields */
  
  /**
   * Define a property to the specified object with the given name.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return true value - if the operation was successful
   *         value marked with error flag - otherwise
   */
  jerry_value_t
  jerry_define_own_property (const jerry_value_t obj_val, /**< object value */
                             const jerry_value_t prop_name_val, /**< property name (string value) */
                             const jerry_property_descriptor_t *prop_desc_p) /**< property descriptor */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val)
        || !ecma_is_value_prop_name (prop_name_val))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    if ((prop_desc_p->is_writable_defined || prop_desc_p->is_value_defined)
        && (prop_desc_p->is_get_defined || prop_desc_p->is_set_defined))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    ecma_property_descriptor_t prop_desc = ecma_make_empty_property_descriptor ();
  
    prop_desc.is_enumerable_defined = ECMA_BOOL_TO_BITFIELD (prop_desc_p->is_enumerable_defined);
    prop_desc.is_enumerable = ECMA_BOOL_TO_BITFIELD (prop_desc_p->is_enumerable_defined ? prop_desc_p->is_enumerable
                                                                                        : false);
  
    prop_desc.is_configurable_defined = ECMA_BOOL_TO_BITFIELD (prop_desc_p->is_configurable_defined);
    prop_desc.is_configurable = ECMA_BOOL_TO_BITFIELD (prop_desc_p->is_configurable_defined ? prop_desc_p->is_configurable
                                                                                            : false);
  
    /* Copy data property info. */
    prop_desc.is_value_defined = ECMA_BOOL_TO_BITFIELD (prop_desc_p->is_value_defined);
  
    if (prop_desc_p->is_value_defined)
    {
      if (ecma_is_value_error_reference (prop_desc_p->value))
      {
        return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
      }
  
      prop_desc.value = prop_desc_p->value;
    }
  
    prop_desc.is_writable_defined = ECMA_BOOL_TO_BITFIELD (prop_desc_p->is_writable_defined);
    prop_desc.is_writable = ECMA_BOOL_TO_BITFIELD (prop_desc_p->is_writable_defined ? prop_desc_p->is_writable
                                                                                    : false);
  
    /* Copy accessor property info. */
    if (prop_desc_p->is_get_defined)
    {
      ecma_value_t getter = prop_desc_p->getter;
      prop_desc.is_get_defined = true;
  
      if (ecma_is_value_error_reference (getter))
      {
        return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
      }
  
      if (ecma_op_is_callable (getter))
      {
        prop_desc.get_p = ecma_get_object_from_value (getter);
      }
      else if (!ecma_is_value_null (getter))
      {
        return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
      }
    }
  
    if (prop_desc_p->is_set_defined)
    {
      ecma_value_t setter = prop_desc_p->setter;
      prop_desc.is_set_defined = true;
  
      if (ecma_is_value_error_reference (setter))
      {
        return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
      }
  
      if (ecma_op_is_callable (setter))
      {
        prop_desc.set_p = ecma_get_object_from_value (setter);
      }
      else if (!ecma_is_value_null (setter))
      {
        return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
      }
    }
  
    return ecma_op_object_define_own_property (ecma_get_object_from_value (obj_val),
                                               ecma_get_prop_name_from_value (prop_name_val),
                                               &prop_desc,
                                               true);
  } /* jerry_define_own_property */
  
  /**
   * Construct property descriptor from specified property.
   *
   * @return true - if success, the prop_desc_p fields contains the property info
   *         false - otherwise, the prop_desc_p is unchanged
   */
  bool
  jerry_get_own_property_descriptor (const jerry_value_t  obj_val, /**< object value */
                                     const jerry_value_t prop_name_val, /**< property name (string value) */
                                     jerry_property_descriptor_t *prop_desc_p) /**< property descriptor */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val)
        || !ecma_is_value_prop_name (prop_name_val))
    {
      return false;
    }
  
    ecma_property_descriptor_t prop_desc;
  
    if (!ecma_op_object_get_own_property_descriptor (ecma_get_object_from_value (obj_val),
                                                     ecma_get_prop_name_from_value (prop_name_val),
                                                     &prop_desc))
    {
      return false;
    }
  
    prop_desc_p->is_configurable_defined = true;
    prop_desc_p->is_configurable = prop_desc.is_configurable;
    prop_desc_p->is_enumerable_defined = true;
    prop_desc_p->is_enumerable = prop_desc.is_enumerable;
  
    prop_desc_p->is_writable_defined = prop_desc.is_writable_defined;
    prop_desc_p->is_writable = prop_desc.is_writable_defined ? prop_desc.is_writable : false;
  
    prop_desc_p->is_value_defined = prop_desc.is_value_defined;
    prop_desc_p->is_get_defined = prop_desc.is_get_defined;
    prop_desc_p->is_set_defined = prop_desc.is_set_defined;
  
    prop_desc_p->value = ECMA_VALUE_UNDEFINED;
    prop_desc_p->getter = ECMA_VALUE_UNDEFINED;
    prop_desc_p->setter = ECMA_VALUE_UNDEFINED;
  
    if (prop_desc.is_value_defined)
    {
      prop_desc_p->value = prop_desc.value;
    }
  
    if (prop_desc.is_get_defined)
    {
      if (prop_desc.get_p != NULL)
      {
        prop_desc_p->getter = ecma_make_object_value (prop_desc.get_p);
      }
      else
      {
        prop_desc_p->getter = ECMA_VALUE_NULL;
      }
    }
  
    if (prop_desc.is_set_defined)
    {
      if (prop_desc.set_p != NULL)
      {
        prop_desc_p->setter = ecma_make_object_value (prop_desc.set_p);
      }
      else
      {
        prop_desc_p->setter = ECMA_VALUE_NULL;
      }
    }
  
    return true;
  } /* jerry_get_own_property_descriptor */
  
  /**
   * Free fields of property descriptor (setter, getter and value).
   */
  void
  jerry_free_property_descriptor_fields (const jerry_property_descriptor_t *prop_desc_p) /**< property descriptor */
  {
    if (prop_desc_p->is_value_defined)
    {
      jerry_release_value (prop_desc_p->value);
    }
  
    if (prop_desc_p->is_get_defined)
    {
      jerry_release_value (prop_desc_p->getter);
    }
  
    if (prop_desc_p->is_set_defined)
    {
      jerry_release_value (prop_desc_p->setter);
    }
  } /* jerry_free_property_descriptor_fields */
  
  /**
   * Invoke function specified by a function value
   *
   * Note:
   *      - returned value must be freed with jerry_release_value, when it is no longer needed.
   *      - If function is invoked as constructor, it should support [[Construct]] method,
   *        otherwise, if function is simply called - it should support [[Call]] method.
   *
   * @return returned jerry value of the invoked function
   */
  static jerry_value_t
  jerry_invoke_function (bool is_invoke_as_constructor, /**< true - invoke function as constructor
                                                         *          (this_arg_p should be NULL, as it is ignored),
                                                         *   false - perform function call */
                         const jerry_value_t func_obj_val, /**< function object to call */
                         const jerry_value_t this_val, /**< object value of 'this' binding */
                         const jerry_value_t args_p[], /**< function's call arguments */
                         const jerry_size_t args_count) /**< number of the arguments */
  {
    JERRY_ASSERT (args_count == 0 || args_p != NULL);
  
    if (ecma_is_value_error_reference (func_obj_val)
        || ecma_is_value_error_reference (this_val))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (error_value_msg_p)));
    }
  
    for (uint32_t i = 0; i < args_count; i++)
    {
      if (ecma_is_value_error_reference (args_p[i]))
      {
        return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (error_value_msg_p)));
      }
    }
  
    if (is_invoke_as_constructor)
    {
      JERRY_ASSERT (jerry_value_is_constructor (func_obj_val));
  
      return jerry_return (ecma_op_function_construct (ecma_get_object_from_value (func_obj_val),
                                                       ECMA_VALUE_UNDEFINED,
                                                       args_p,
                                                       args_count));
    }
    else
    {
      JERRY_ASSERT (jerry_value_is_function (func_obj_val));
  
      return jerry_return (ecma_op_function_call (ecma_get_object_from_value (func_obj_val),
                                                  this_val,
                                                  args_p,
                                                  args_count));
    }
  } /* jerry_invoke_function */
  
  /**
   * Call function specified by a function value
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *      error flag must not be set for any arguments of this function.
   *
   * @return returned jerry value of the called function
   */
  jerry_value_t
  jerry_call_function (const jerry_value_t func_obj_val, /**< function object to call */
                       const jerry_value_t this_val, /**< object for 'this' binding */
                       const jerry_value_t args_p[], /**< function's call arguments */
                       jerry_size_t args_count) /**< number of the arguments */
  {
    jerry_assert_api_available ();
  
    if (jerry_value_is_function (func_obj_val))
    {
      return jerry_invoke_function (false, func_obj_val, this_val, args_p, args_count);
    }
  
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
  } /* jerry_call_function */
  
  /**
   * Construct object value invoking specified function value as a constructor
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *      error flag must not be set for any arguments of this function.
   *
   * @return returned jerry value of the invoked constructor
   */
  jerry_value_t
  jerry_construct_object (const jerry_value_t func_obj_val, /**< function object to call */
                          const jerry_value_t args_p[], /**< function's call arguments
                                                         *   (NULL if arguments number is zero) */
                          jerry_size_t args_count) /**< number of the arguments */
  {
    jerry_assert_api_available ();
  
    if (jerry_value_is_constructor (func_obj_val))
    {
      ecma_value_t this_val = ECMA_VALUE_UNDEFINED;
      return jerry_invoke_function (true, func_obj_val, this_val, args_p, args_count);
    }
  
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
  } /* jerry_construct_object */
  
  /**
   * Get keys of the specified object value
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return array object value - if success
   *         value marked with error flag - otherwise
   */
  jerry_value_t
  jerry_get_object_keys (const jerry_value_t obj_val) /**< object value */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    return ecma_builtin_helper_object_get_properties (ecma_get_object_from_value (obj_val),
                                                      ECMA_LIST_ENUMERABLE);
  } /* jerry_get_object_keys */
  
  /**
   * Get the prototype of the specified object
   *
   * @return prototype object or null value - if success
   *         value marked with error flag - otherwise
   */
  jerry_value_t
  jerry_get_prototype (const jerry_value_t obj_val) /**< object value */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    ecma_object_t *proto_obj_p = ecma_get_object_prototype (ecma_get_object_from_value (obj_val));
  
    if (proto_obj_p == NULL)
    {
      return ECMA_VALUE_NULL;
    }
  
    return ecma_make_object_value (proto_obj_p);
  } /* jerry_get_prototype */
  
  /**
   * Set the prototype of the specified object
   *
   * @return true value - if success
   *         value marked with error flag - otherwise
   */
  jerry_value_t
  jerry_set_prototype (const jerry_value_t obj_val, /**< object value */
                       const jerry_value_t proto_obj_val) /**< prototype object value */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val)
        || ecma_is_value_error_reference (proto_obj_val)
        || (!ecma_is_value_object (proto_obj_val) && !ecma_is_value_null (proto_obj_val)))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    if (ecma_is_value_null (proto_obj_val))
    {
      ECMA_SET_POINTER (ecma_get_object_from_value (obj_val)->prototype_or_outer_reference_cp, NULL);
    }
    else
    {
      ECMA_SET_POINTER (ecma_get_object_from_value (obj_val)->prototype_or_outer_reference_cp,
                        ecma_get_object_from_value (proto_obj_val));
    }
  
    return ECMA_VALUE_TRUE;
  } /* jerry_set_prototype */
  
  /**
   * Traverse objects.
   *
   * @return true - traversal was interrupted by the callback.
   *         false - otherwise - traversal visited all objects.
   */
  bool
  jerry_objects_foreach (jerry_objects_foreach_t foreach_p, /**< function pointer of the iterator function */
                         void *user_data_p) /**< pointer to user data */
  {
    jerry_assert_api_available ();
  
    JERRY_ASSERT (foreach_p != NULL);
  
    for (ecma_object_t *iter_p = ECMA_GET_POINTER (ecma_object_t, JERRY_CONTEXT (ecma_gc_objects_cp));
         iter_p != NULL;
         iter_p = ECMA_GET_POINTER (ecma_object_t, iter_p->gc_next_cp))
    {
      if (!ecma_is_lexical_environment (iter_p)
          && !foreach_p (ecma_make_object_value (iter_p), user_data_p))
      {
        return true;
      }
    }
  
    return false;
  } /* jerry_objects_foreach */
  
  /**
   * Traverse objects having a given native type info.
   *
   * @return true - traversal was interrupted by the callback.
   *         false - otherwise - traversal visited all objects.
   */
  bool
  jerry_objects_foreach_by_native_info (const jerry_object_native_info_t *native_info_p, /**< the type info
                                                                                          *   of the native pointer */
                                        jerry_objects_foreach_by_native_info_t foreach_p, /**< function to apply for
                                                                                           *   each matching object */
                                        void *user_data_p) /**< pointer to user data */
  {
    jerry_assert_api_available ();
  
    JERRY_ASSERT (native_info_p != NULL);
    JERRY_ASSERT (foreach_p != NULL);
  
    ecma_native_pointer_t *native_pointer_p;
  
    for (ecma_object_t *iter_p = ECMA_GET_POINTER (ecma_object_t, JERRY_CONTEXT (ecma_gc_objects_cp));
         iter_p != NULL;
         iter_p = ECMA_GET_POINTER (ecma_object_t, iter_p->gc_next_cp))
    {
      if (!ecma_is_lexical_environment (iter_p))
      {
        native_pointer_p = ecma_get_native_pointer_value (iter_p, (void *) native_info_p);
        if (native_pointer_p
            && !foreach_p (ecma_make_object_value (iter_p), native_pointer_p->data_p, user_data_p))
        {
          return true;
        }
      }
    }
  
    return false;
  } /* jerry_objects_foreach_by_native_info */
  
  /**
   * Get native pointer and its type information, associated with the given native type info.
   *
   * Note:
   *  If native pointer is present, its type information is returned in out_native_pointer_p
   *
   * @return true - if there is an associated pointer,
   *         false - otherwise
   */
  bool
  jerry_get_object_native_pointer (const jerry_value_t obj_val, /**< object to get native pointer from */
                                   void **out_native_pointer_p, /**< [out] native pointer */
                                   const jerry_object_native_info_t *native_info_p) /**< the type info
                                                                                     *   of the native pointer */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val))
    {
      return false;
    }
  
    ecma_native_pointer_t *native_pointer_p;
    native_pointer_p = ecma_get_native_pointer_value (ecma_get_object_from_value (obj_val), (void *) native_info_p);
  
    if (native_pointer_p == NULL)
    {
      return false;
    }
  
    if (out_native_pointer_p != NULL)
    {
      *out_native_pointer_p = native_pointer_p->data_p;
    }
  
    return true;
  } /* jerry_get_object_native_pointer */
  
  /**
   * Set native pointer and an optional type info for the specified object.
   *
   *
   * Note:
   *      If native pointer was already set for the object, its value is updated.
   *
   * Note:
   *      If a non-NULL free callback is specified in the native type info,
   *      it will be called by the garbage collector when the object is freed.
   *      This callback **must not** invoke API functions.
   *      The type info always overwrites the previous value, so passing
   *      a NULL value deletes the current type info.
   */
  void
  jerry_set_object_native_pointer (const jerry_value_t obj_val, /**< object to set native pointer in */
                                   void *native_pointer_p, /**< native pointer */
                                   const jerry_object_native_info_t *native_info_p) /**< object's native type info */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_object (obj_val))
    {
      ecma_object_t *object_p = ecma_get_object_from_value (obj_val);
  
      ecma_create_native_pointer_property (object_p, native_pointer_p, (void *) native_info_p);
    }
  } /* jerry_set_object_native_pointer */
  
  /**
   * Delete the previously set native pointer by the native type info from the specified object.
   *
   * Note:
   *      If the specified object has no matching native pointer for the given native type info
   *      the function has no effect.
   *
   * Note:
   *      This operation cannot throw an exception.
   *
   * @return true - if the native pointer has been deleted succesfully
   *         false - otherwise
   */
  bool
  jerry_delete_object_native_pointer (const jerry_value_t obj_val, /**< object to delete native pointer from */
                                      const jerry_object_native_info_t *native_info_p) /**< object's native type info */
  {
    jerry_assert_api_available ();
  
    if (ecma_is_value_object (obj_val))
    {
      ecma_object_t *object_p = ecma_get_object_from_value (obj_val);
  
      return ecma_delete_native_pointer_property (object_p, (void *) native_info_p);
    }
  
    return false;
  } /* jerry_delete_object_native_pointer */
  
  /**
   * Applies the given function to the every property in the object.
   *
   * @return true - if object fields traversal was performed successfully, i.e.:
   *                - no unhandled exceptions were thrown in object fields traversal;
   *                - object fields traversal was stopped on callback that returned false;
   *         false - otherwise,
   *                 if getter of field threw a exception or unhandled exceptions were thrown during traversal;
   */
  bool
  jerry_foreach_object_property (const jerry_value_t obj_val, /**< object value */
                                 jerry_object_property_foreach_t foreach_p, /**< foreach function */
                                 void *user_data_p) /**< user data for foreach function */
  {
    jerry_assert_api_available ();
  
    if (!ecma_is_value_object (obj_val))
    {
      return false;
    }
  
    ecma_object_t *object_p = ecma_get_object_from_value (obj_val);
    ecma_collection_header_t *names_p = ecma_op_object_get_property_names (object_p, ECMA_LIST_ENUMERABLE_PROTOTYPE);
    ecma_value_t *ecma_value_p = ecma_collection_iterator_init (names_p);
  
    ecma_value_t property_value = ECMA_VALUE_EMPTY;
  
    bool continuous = true;
  
    while (continuous && ecma_value_p != NULL)
    {
      ecma_string_t *property_name_p = ecma_get_string_from_value (*ecma_value_p);
  
      property_value = ecma_op_object_get (object_p, property_name_p);
  
      if (ECMA_IS_VALUE_ERROR (property_value))
      {
        break;
      }
  
      continuous = foreach_p (*ecma_value_p, property_value, user_data_p);
      ecma_free_value (property_value);
  
      ecma_value_p = ecma_collection_iterator_next (ecma_value_p);
    }
  
    ecma_free_values_collection (names_p, 0);
  
    if (!ECMA_IS_VALUE_ERROR (property_value))
    {
      return true;
    }
  
    ecma_free_value (JERRY_CONTEXT (error_value));
    return false;
  } /* jerry_foreach_object_property */
  
  /**
   * Resolve or reject the promise with an argument.
   *
   * @return undefined value - if success
   *         value marked with error flag - otherwise
   */
  jerry_value_t
  jerry_resolve_or_reject_promise (jerry_value_t promise, /**< the promise value */
                                   jerry_value_t argument, /**< the argument */
                                   bool is_resolve) /**< whether the promise should be resolved or rejected */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_PROMISE)
    if (!ecma_is_value_object (promise) || !ecma_is_promise (ecma_get_object_from_value (promise)))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    lit_magic_string_id_t prop_name = (is_resolve ? LIT_INTERNAL_MAGIC_STRING_RESOLVE_FUNCTION
                                                  : LIT_INTERNAL_MAGIC_STRING_REJECT_FUNCTION);
  
    ecma_value_t function = ecma_op_object_get_by_magic_id (ecma_get_object_from_value (promise), prop_name);
  
    ecma_value_t ret = ecma_op_function_call (ecma_get_object_from_value (function),
                                              ECMA_VALUE_UNDEFINED,
                                              &argument,
                                              1);
  
    ecma_free_value (function);
  
    return ret;
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
    JERRY_UNUSED (promise);
    JERRY_UNUSED (argument);
    JERRY_UNUSED (is_resolve);
  
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Promise not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_PROMISE) */
  } /* jerry_resolve_or_reject_promise */
  
  /**
   * Call the SymbolDescriptiveString ecma builtin operation on the symbol value.
   *
   * Note:
   *      returned value must be freed with jerry_release_value, when it is no longer needed.
   *
   * @return string value containing the symbol's descriptive string - if success
   *         thrown error - otherwise
   */
  jerry_value_t
  jerry_get_symbol_descriptive_string (const jerry_value_t symbol) /**< symbol value */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_SYMBOL)
    if (!ecma_is_value_symbol (symbol))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    /* Note: This operation cannot throw an error */
    return ecma_get_symbol_descriptive_string (symbol);
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_SYMBOL) */
    JERRY_UNUSED (symbol);
  
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Symbol is not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_SYMBOL) */
  } /** jerry_get_symbol_descriptive_string */
  
  /**
   * Validate UTF-8 string
   *
   * @return true - if UTF-8 string is well-formed
   *         false - otherwise
   */
  bool
  jerry_is_valid_utf8_string (const jerry_char_t *utf8_buf_p, /**< UTF-8 string */
                              jerry_size_t buf_size) /**< string size */
  {
    return lit_is_valid_utf8_string ((lit_utf8_byte_t *) utf8_buf_p,
                                     (lit_utf8_size_t) buf_size);
  } /* jerry_is_valid_utf8_string */
  
  /**
   * Validate CESU-8 string
   *
   * @return true - if CESU-8 string is well-formed
   *         false - otherwise
   */
  bool
  jerry_is_valid_cesu8_string (const jerry_char_t *cesu8_buf_p, /**< CESU-8 string */
                               jerry_size_t buf_size) /**< string size */
  {
    return lit_is_valid_cesu8_string ((lit_utf8_byte_t *) cesu8_buf_p,
                                      (lit_utf8_size_t) buf_size);
  } /* jerry_is_valid_cesu8_string */
  
  /**
   * Allocate memory on the engine's heap.
   *
   * Note:
   *      This function may take away memory from the executed JavaScript code.
   *      If any other dynamic memory allocation API is available (e.g., libc
   *      malloc), it should be used instead.
   *
   * @return allocated memory on success
   *         NULL otherwise
   */
  void *
  jerry_heap_alloc (size_t size) /**< size of the memory block */
  {
    jerry_assert_api_available ();
  
    return jmem_heap_alloc_block_null_on_error (size);
  } /* jerry_heap_alloc */
  
  /**
   * Free memory allocated on the engine's heap.
   */
  void
  jerry_heap_free (void *mem_p, /**< value returned by jerry_heap_alloc */
                   size_t size) /**< same size as passed to jerry_heap_alloc */
  {
    jerry_assert_api_available ();
  
    jmem_heap_free_block (mem_p, size);
  } /* jerry_heap_free */
  
  /**
   * Create an external engine context.
   *
   * @return the pointer to the context.
   */
  jerry_context_t *
  jerry_create_context (uint32_t heap_size, /**< the size of heap */
                        jerry_context_alloc_t alloc, /**< the alloc function */
                        void *cb_data_p) /**< the cb_data for alloc function */
  {
    JERRY_UNUSED (heap_size);
  
  #if ENABLED (JERRY_EXTERNAL_CONTEXT)
  
    size_t total_size = sizeof (jerry_context_t) + JMEM_ALIGNMENT;
  
  #if !ENABLED (JERRY_SYSTEM_ALLOCATOR)
    heap_size = JERRY_ALIGNUP (heap_size, JMEM_ALIGNMENT);
  
    /* Minimum heap size is 1Kbyte. */
    if (heap_size < 1024)
    {
      return NULL;
    }
  
    total_size += heap_size;
  #endif /* !ENABLED (JERRY_SYSTEM_ALLOCATOR) */
  
    total_size = JERRY_ALIGNUP (total_size, JMEM_ALIGNMENT);
  
    jerry_context_t *context_p = (jerry_context_t *) alloc (total_size, cb_data_p);
  
    if (context_p == NULL)
    {
      return NULL;
    }
  
    memset (context_p, 0, total_size);
  
    uintptr_t context_ptr = ((uintptr_t) context_p) + sizeof (jerry_context_t);
    context_ptr = JERRY_ALIGNUP (context_ptr, (uintptr_t) JMEM_ALIGNMENT);
  
    uint8_t *byte_p = (uint8_t *) context_ptr;
  
  #if !ENABLED (JERRY_SYSTEM_ALLOCATOR)
    context_p->heap_p = (jmem_heap_t *) byte_p;
    context_p->heap_size = heap_size;
    byte_p += heap_size;
  #endif /* !ENABLED (JERRY_SYSTEM_ALLOCATOR) */
  
    JERRY_ASSERT (byte_p <= ((uint8_t *) context_p) + total_size);
  
    JERRY_UNUSED (byte_p);
    return context_p;
  
  #else /* !ENABLED (JERRY_EXTERNAL_CONTEXT) */
  
    JERRY_UNUSED (alloc);
    JERRY_UNUSED (cb_data_p);
  
    return NULL;
  
  #endif /* ENABLED (JERRY_EXTERNAL_CONTEXT) */
  } /* jerry_create_context */
  
  /**
   * If JERRY_VM_EXEC_STOP is enabled the callback passed to this function is
   * periodically called with the user_p argument. If frequency is greater
   * than 1, the callback is only called at every frequency ticks.
   */
  void
  jerry_set_vm_exec_stop_callback (jerry_vm_exec_stop_callback_t stop_cb, /**< periodically called user function */
                                   void *user_p, /**< pointer passed to the function */
                                   uint32_t frequency) /**< frequency of the function call */
  {
  #if ENABLED (JERRY_VM_EXEC_STOP)
    if (frequency == 0)
    {
      frequency = 1;
    }
  
    JERRY_CONTEXT (vm_exec_stop_frequency) = frequency;
    JERRY_CONTEXT (vm_exec_stop_counter) = frequency;
    JERRY_CONTEXT (vm_exec_stop_user_p) = user_p;
    JERRY_CONTEXT (vm_exec_stop_cb) = stop_cb;
  #else /* !ENABLED (JERRY_VM_EXEC_STOP) */
    JERRY_UNUSED (stop_cb);
    JERRY_UNUSED (user_p);
    JERRY_UNUSED (frequency);
  #endif /* ENABLED (JERRY_VM_EXEC_STOP) */
  } /* jerry_set_vm_exec_stop_callback */
  
  /**
   * Get backtrace. The backtrace is an array of strings where
   * each string contains the position of the corresponding frame.
   * The array length is zero if the backtrace is not available.
   *
   * @return array value
   */
  jerry_value_t
  jerry_get_backtrace (uint32_t max_depth) /**< depth limit of the backtrace */
  {
    return vm_get_backtrace (max_depth);
  } /* jerry_get_backtrace */
  
  /**
   * Check if the given value is an ArrayBuffer object.
   *
   * @return true - if it is an ArrayBuffer object
   *         false - otherwise
   */
  bool
  jerry_value_is_arraybuffer (const jerry_value_t value) /**< value to check if it is an ArrayBuffer */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    return ecma_is_arraybuffer (value);
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (value);
    return false;
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  } /* jerry_value_is_arraybuffer */
  
  /**
   * Creates an ArrayBuffer object with the given length (size).
   *
   * Notes:
   *      * the length is specified in bytes.
   *      * returned value must be freed with jerry_release_value, when it is no longer needed.
   *      * if the typed arrays are disabled this will return a TypeError.
   *
   * @return value of the constructed ArrayBuffer object
   */
  jerry_value_t
  jerry_create_arraybuffer (const jerry_length_t size) /**< size of the ArrayBuffer to create */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    return jerry_return (ecma_make_object_value (ecma_arraybuffer_new_object (size)));
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (size);
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("ArrayBuffer not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  } /* jerry_create_arraybuffer */
  
  /**
   * Creates an ArrayBuffer object with user specified buffer.
   *
   * Notes:
   *     * the size is specified in bytes.
   *     * the buffer passed should be at least the specified bytes big.
   *     * if the typed arrays are disabled this will return a TypeError.
   *     * if the size is zero or the buffer_p is a null pointer this will return a RangeError.
   *
   * @return value of the construced ArrayBuffer object
   */
  jerry_value_t
  jerry_create_arraybuffer_external (const jerry_length_t size, /**< size of the buffer to used */
                                     uint8_t *buffer_p, /**< buffer to use as the ArrayBuffer's backing */
                                     jerry_object_native_free_callback_t free_cb) /**< buffer free callback */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    if (size == 0 || buffer_p == NULL)
    {
      return jerry_throw (ecma_raise_range_error (ECMA_ERR_MSG ("invalid buffer size or storage reference")));
    }
  
    ecma_object_t *arraybuffer = ecma_arraybuffer_new_object_external (size,
                                                                       buffer_p,
                                                                       (ecma_object_native_free_callback_t) free_cb);
    return jerry_return (ecma_make_object_value (arraybuffer));
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (size);
    JERRY_UNUSED (buffer_p);
    JERRY_UNUSED (free_cb);
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("ArrayBuffer not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  } /* jerry_create_arraybuffer_external */
  
  /**
   * Copy bytes into the ArrayBuffer from a buffer.
   *
   * Note:
   *     * if the object passed is not an ArrayBuffer will return 0.
   *
   * @return number of bytes copied into the ArrayBuffer.
   */
  jerry_length_t
  jerry_arraybuffer_write (const jerry_value_t value, /**< target ArrayBuffer */
                           jerry_length_t offset, /**< start offset of the ArrayBuffer */
                           const uint8_t *buf_p, /**< buffer to copy from */
                           jerry_length_t buf_size) /**< number of bytes to copy from the buffer */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    if (!ecma_is_arraybuffer (value))
    {
      return 0;
    }
  
    ecma_object_t *buffer_p = ecma_get_object_from_value (value);
    jerry_length_t length = ecma_arraybuffer_get_length (buffer_p);
  
    if (offset >= length)
    {
      return 0;
    }
  
    jerry_length_t copy_count = JERRY_MIN (length - offset, buf_size);
  
    if (copy_count > 0)
    {
      lit_utf8_byte_t *mem_buffer_p = ecma_arraybuffer_get_buffer (buffer_p);
  
      memcpy ((void *) (mem_buffer_p + offset), (void *) buf_p, copy_count);
    }
  
    return copy_count;
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (value);
    JERRY_UNUSED (offset);
    JERRY_UNUSED (buf_p);
    JERRY_UNUSED (buf_size);
    return 0;
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  } /* jerry_arraybuffer_write */
  
  /**
   * Copy bytes from a buffer into an ArrayBuffer.
   *
   * Note:
   *     * if the object passed is not an ArrayBuffer will return 0.
   *
   * @return number of bytes read from the ArrayBuffer.
   */
  jerry_length_t
  jerry_arraybuffer_read (const jerry_value_t value, /**< ArrayBuffer to read from */
                          jerry_length_t offset, /**< start offset of the ArrayBuffer */
                          uint8_t *buf_p, /**< destination buffer to copy to */
                          jerry_length_t buf_size) /**< number of bytes to copy into the buffer */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    if (!ecma_is_arraybuffer (value))
    {
      return 0;
    }
  
    ecma_object_t *buffer_p = ecma_get_object_from_value (value);
    jerry_length_t length = ecma_arraybuffer_get_length (buffer_p);
  
    if (offset >= length)
    {
      return 0;
    }
  
    jerry_length_t copy_count = JERRY_MIN (length - offset, buf_size);
  
    if (copy_count > 0)
    {
      lit_utf8_byte_t *mem_buffer_p = ecma_arraybuffer_get_buffer (buffer_p);
  
      memcpy ((void *) buf_p, (void *) (mem_buffer_p + offset), copy_count);
    }
  
    return copy_count;
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (value);
    JERRY_UNUSED (offset);
    JERRY_UNUSED (buf_p);
    JERRY_UNUSED (buf_size);
    return 0;
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  } /* jerry_arraybuffer_read */
  
  /**
   * Get the length (size) of the ArrayBuffer in bytes.
   *
   * Note:
   *     This is the 'byteLength' property of an ArrayBuffer.
   *
   * @return the length of the ArrayBuffer in bytes.
   */
  jerry_length_t
  jerry_get_arraybuffer_byte_length (const jerry_value_t value) /**< ArrayBuffer */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    if (ecma_is_arraybuffer (value))
    {
      ecma_object_t *buffer_p = ecma_get_object_from_value (value);
      return ecma_arraybuffer_get_length (buffer_p);
    }
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (value);
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    return 0;
  } /* jerry_get_arraybuffer_byte_length */
  
  /**
   * Get a pointer for the start of the ArrayBuffer.
   *
   * Note:
   *    * This is a high-risk operation as the bounds are not checked
   *      when accessing the pointer elements.
   *
   * @return pointer to the back-buffer of the ArrayBuffer.
   *         pointer is NULL if the parameter is not an ArrayBuffer
   */
  uint8_t *
  jerry_get_arraybuffer_pointer (const jerry_value_t array_buffer) /**< Array Buffer to use */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    if (ecma_is_value_error_reference (array_buffer)
        || !ecma_is_arraybuffer (array_buffer))
    {
      return NULL;
    }
  
    ecma_object_t *buffer_p = ecma_get_object_from_value (array_buffer);
    lit_utf8_byte_t *mem_buffer_p = ecma_arraybuffer_get_buffer (buffer_p);
    return (uint8_t *const) mem_buffer_p;
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (array_buffer);
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  
    return NULL;
  } /* jerry_get_arraybuffer_pointer */
  
  /**
   * DataView related functions
   */
  
  /**
   * Creates a DataView object with the given ArrayBuffer, ByteOffset and ByteLength arguments.
   *
   * Notes:
   *      * returned value must be freed with jerry_release_value, when it is no longer needed.
   *      * if the DataView bulitin is disabled this will return a TypeError.
   *
   * @return value of the constructed DataView object - if success
   *         created error - otherwise
   */
  jerry_value_t
  jerry_create_dataview (const jerry_value_t array_buffer, /**< arraybuffer to create DataView from */
                         const jerry_length_t byte_offset, /**< offset in bytes, to the first byte in the buffer */
                         const jerry_length_t byte_length) /**< number of elements in the byte array */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW)
    if (ecma_is_value_error_reference (array_buffer))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    ecma_value_t arguments_p[3] =
    {
      array_buffer,
      ecma_make_uint32_value (byte_offset),
      ecma_make_uint32_value (byte_length)
    };
  
    return jerry_return (ecma_op_dataview_create (arguments_p, 3));
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW) */
    JERRY_UNUSED (array_buffer);
    JERRY_UNUSED (byte_offset);
    JERRY_UNUSED (byte_length);
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("DataView is not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW */
  } /* jerry_create_dataview */
  
  /**
   * Check if the given value is a DataView object.
   *
   * @return true - if it is a DataView object
   *         false - otherwise
   */
  bool
  jerry_value_is_dataview (const jerry_value_t value) /**< value to check if it is a DataView object */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW)
    if (!ecma_is_value_object (value))
    {
      return false;
    }
  
    ecma_dataview_object_t *dataview_object_p = (ecma_dataview_object_t *) ecma_get_object_from_value (value);
  
    return (ecma_get_object_type (&dataview_object_p->header.object) == ECMA_OBJECT_TYPE_CLASS
            && dataview_object_p->header.u.class_prop.class_id == LIT_MAGIC_STRING_DATAVIEW_UL);
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW) */
    JERRY_UNUSED (value);
    return false;
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW */
  } /* jerry_value_is_dataview */
  
  /**
   * Get the underlying ArrayBuffer from a DataView.
   *
   * Additionally the byteLength and byteOffset properties are also returned
   * which were specified when the DataView was created.
   *
   * Note:
   *     the returned value must be freed with a jerry_release_value call
   *
   * @return ArrayBuffer of a DataView
   *         TypeError if the object is not a DataView.
   */
  jerry_value_t
  jerry_get_dataview_buffer (const jerry_value_t value, /**< DataView to get the arraybuffer from */
                             jerry_length_t *byte_offset, /**< [out] byteOffset property */
                             jerry_length_t *byte_length) /**< [out] byteLength property */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW)
    if (ecma_is_value_error_reference (value))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
    }
  
    ecma_dataview_object_t *dataview_p = ecma_op_dataview_get_object (value);
  
    if (JERRY_UNLIKELY (dataview_p == NULL))
    {
      return ecma_create_error_reference_from_context ();
    }
  
    if (byte_offset != NULL)
    {
      *byte_offset = dataview_p->byte_offset;
    }
  
    if (byte_length != NULL)
    {
      *byte_length = dataview_p->header.u.class_prop.u.length;
    }
  
    ecma_object_t *arraybuffer_p = dataview_p->buffer_p;
    ecma_ref_object (arraybuffer_p);
  
    return ecma_make_object_value (arraybuffer_p);
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW) */
    JERRY_UNUSED (value);
    JERRY_UNUSED (byte_offset);
    JERRY_UNUSED (byte_length);
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("DataView is not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_DATAVIEW */
  } /* jerry_get_dataview_buffer */
  
  /**
   * TypedArray related functions
   */
  
  /**
   * Check if the given value is a TypedArray object.
   *
   * @return true - if it is a TypedArray object
   *         false - otherwise
   */
  bool
  jerry_value_is_typedarray (jerry_value_t value) /**< value to check if it is a TypedArray */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    return ecma_is_typedarray (value);
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (value);
    return false;
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  } /* jerry_value_is_typedarray */
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
  /**
   * TypedArray mapping type
   */
  typedef struct
  {
    jerry_typedarray_type_t api_type; /**< api type */
    ecma_builtin_id_t prototype_id; /**< prototype ID */
    lit_magic_string_id_t lit_id; /**< literal ID */
    uint8_t element_size_shift; /**< element size shift */
  } jerry_typedarray_mapping_t;
  
  /**
   * List of TypedArray mappings
   */
  static jerry_typedarray_mapping_t jerry_typedarray_mappings[] =
  {
  #define TYPEDARRAY_ENTRY(NAME, LIT_NAME, SIZE_SHIFT) \
    { JERRY_TYPEDARRAY_ ## NAME, ECMA_BUILTIN_ID_ ## NAME ## ARRAY_PROTOTYPE, \
      LIT_MAGIC_STRING_ ## LIT_NAME ## _ARRAY_UL, SIZE_SHIFT }
  
    TYPEDARRAY_ENTRY (UINT8, UINT8, 0),
    TYPEDARRAY_ENTRY (UINT8CLAMPED, UINT8_CLAMPED, 0),
    TYPEDARRAY_ENTRY (INT8, INT8, 0),
    TYPEDARRAY_ENTRY (UINT16, UINT16, 1),
    TYPEDARRAY_ENTRY (INT16, INT16, 1),
    TYPEDARRAY_ENTRY (UINT32, UINT32, 2),
    TYPEDARRAY_ENTRY (INT32, INT32, 2),
    TYPEDARRAY_ENTRY (FLOAT32, FLOAT32, 2),
  #if ENABLED (JERRY_NUMBER_TYPE_FLOAT64)
    TYPEDARRAY_ENTRY (FLOAT64, FLOAT64, 3),
  #endif /* ENABLED (JERRY_NUMBER_TYPE_FLOAT64) */
  
  #undef TYPEDARRAY_ENTRY
  };
  
  /**
   * Helper function to get the TypedArray prototype, literal id, and element size shift
   * information.
   *
   * @return true - if the TypedArray information was found
   *         false - if there is no such TypedArray type
   */
  static bool
  jerry_typedarray_find_by_type (jerry_typedarray_type_t type_name, /**< type of the TypedArray */
                                 ecma_builtin_id_t *prototype_id, /**< [out] found prototype object id */
                                 lit_magic_string_id_t *lit_id, /**< [out] found literal id */
                                 uint8_t *element_size_shift) /**< [out] found element size shift value */
  {
    JERRY_ASSERT (prototype_id != NULL);
    JERRY_ASSERT (lit_id != NULL);
    JERRY_ASSERT (element_size_shift != NULL);
  
    for (uint32_t i = 0; i < sizeof (jerry_typedarray_mappings) / sizeof (jerry_typedarray_mappings[0]); i++)
    {
      if (type_name == jerry_typedarray_mappings[i].api_type)
      {
        *prototype_id = jerry_typedarray_mappings[i].prototype_id;
        *lit_id = jerry_typedarray_mappings[i].lit_id;
        *element_size_shift = jerry_typedarray_mappings[i].element_size_shift;
        return true;
      }
    }
  
    return false;
  } /* jerry_typedarray_find_by_type */
  
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  
  /**
   * Create a TypedArray object with a given type and length.
   *
   * Notes:
   *      * returns TypeError if an incorrect type (type_name) is specified.
   *      * byteOffset property will be set to 0.
   *      * byteLength property will be a multiple of the length parameter (based on the type).
   *
   * @return - new TypedArray object
   */
  jerry_value_t
  jerry_create_typedarray (jerry_typedarray_type_t type_name, /**< type of TypedArray to create */
                           jerry_length_t length) /**< element count of the new TypedArray */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    ecma_builtin_id_t prototype_id = 0;
    lit_magic_string_id_t lit_id = 0;
    uint8_t element_size_shift = 0;
  
    if (!jerry_typedarray_find_by_type (type_name, &prototype_id, &lit_id, &element_size_shift))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("incorrect type for TypedArray.")));
    }
  
    ecma_object_t *prototype_obj_p = ecma_builtin_get (prototype_id);
  
    ecma_value_t array_value = ecma_typedarray_create_object_with_length (length,
                                                                          prototype_obj_p,
                                                                          element_size_shift,
                                                                          lit_id);
  
    JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (array_value));
  
    return array_value;
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (type_name);
    JERRY_UNUSED (length);
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("TypedArray not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  } /* jerry_create_typedarray */
  
  /**
   * Create a TypedArray object using the given arraybuffer and size information.
   *
   * Notes:
   *      * returns TypeError if an incorrect type (type_name) is specified.
   *      * this is the 'new %TypedArray%(arraybuffer, byteOffset, length)' equivalent call.
   *
   * @return - new TypedArray object
   */
  jerry_value_t
  jerry_create_typedarray_for_arraybuffer_sz (jerry_typedarray_type_t type_name, /**< type of TypedArray to create */
                                              const jerry_value_t arraybuffer, /**< ArrayBuffer to use */
                                              jerry_length_t byte_offset, /**< offset for the ArrayBuffer */
                                              jerry_length_t length) /**< number of elements to use from ArrayBuffer */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    ecma_builtin_id_t prototype_id = 0;
    lit_magic_string_id_t lit_id = 0;
    uint8_t element_size_shift = 0;
  
    if (!jerry_typedarray_find_by_type (type_name, &prototype_id, &lit_id, &element_size_shift))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("incorrect type for TypedArray.")));
    }
  
    if (!ecma_is_arraybuffer (arraybuffer))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Argument is not an ArrayBuffer")));
    }
  
    ecma_object_t *prototype_obj_p = ecma_builtin_get (prototype_id);
    ecma_value_t arguments_p[3] =
    {
      arraybuffer,
      ecma_make_uint32_value (byte_offset),
      ecma_make_uint32_value (length)
    };
  
    ecma_value_t array_value = ecma_op_create_typedarray (arguments_p, 3, prototype_obj_p, element_size_shift, lit_id);
    ecma_free_value (arguments_p[1]);
    ecma_free_value (arguments_p[2]);
  
    return jerry_return (array_value);
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (type_name);
    JERRY_UNUSED (arraybuffer);
    JERRY_UNUSED (byte_offset);
    JERRY_UNUSED (length);
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("TypedArray not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  } /* jerry_create_typedarray_for_arraybuffer_sz */
  
  /**
   * Create a TypedArray object using the given arraybuffer and size information.
   *
   * Notes:
   *      * returns TypeError if an incorrect type (type_name) is specified.
   *      * this is the 'new %TypedArray%(arraybuffer)' equivalent call.
   *
   * @return - new TypedArray object
   */
  jerry_value_t
  jerry_create_typedarray_for_arraybuffer (jerry_typedarray_type_t type_name, /**< type of TypedArray to create */
                                           const jerry_value_t arraybuffer) /**< ArrayBuffer to use */
  {
    jerry_assert_api_available ();
    jerry_length_t byteLength = jerry_get_arraybuffer_byte_length (arraybuffer);
    return jerry_create_typedarray_for_arraybuffer_sz (type_name, arraybuffer, 0, byteLength);
  } /* jerry_create_typedarray_for_arraybuffer */
  
  /**
   * Get the type of the TypedArray.
   *
   * @return - type of the TypedArray
   *         - JERRY_TYPEDARRAY_INVALID if the argument is not a TypedArray
   */
  jerry_typedarray_type_t
  jerry_get_typedarray_type (jerry_value_t value) /**< object to get the TypedArray type */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    if (!ecma_is_typedarray (value))
    {
      return JERRY_TYPEDARRAY_INVALID;
    }
  
    ecma_object_t *array_p = ecma_get_object_from_value (value);
  
    lit_magic_string_id_t class_name_id = ecma_object_get_class_name (array_p);
    for (uint32_t i = 0; i < sizeof (jerry_typedarray_mappings) / sizeof (jerry_typedarray_mappings[0]); i++)
    {
      if (class_name_id == jerry_typedarray_mappings[i].lit_id)
      {
        return jerry_typedarray_mappings[i].api_type;
      }
    }
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (value);
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  
    return JERRY_TYPEDARRAY_INVALID;
  } /* jerry_get_typedarray_type */
  
  /**
   * Get the element count of the TypedArray.
   *
   * @return length of the TypedArray.
   */
  jerry_length_t
  jerry_get_typedarray_length (jerry_value_t value) /**< TypedArray to query */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    if (ecma_is_typedarray (value))
    {
      ecma_object_t *array_p = ecma_get_object_from_value (value);
      return ecma_typedarray_get_length (array_p);
    }
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (value);
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  
    return 0;
  } /* jerry_get_typedarray_length */
  
  /**
   * Get the underlying ArrayBuffer from a TypedArray.
   *
   * Additionally the byteLength and byteOffset properties are also returned
   * which were specified when the TypedArray was created.
   *
   * Note:
   *     the returned value must be freed with a jerry_release_value call
   *
   * @return ArrayBuffer of a TypedArray
   *         TypeError if the object is not a TypedArray.
   */
  jerry_value_t
  jerry_get_typedarray_buffer (jerry_value_t value, /**< TypedArray to get the arraybuffer from */
                               jerry_length_t *byte_offset, /**< [out] byteOffset property */
                               jerry_length_t *byte_length) /**< [out] byteLength property */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
    if (!ecma_is_typedarray (value))
    {
      return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("Object is not a TypedArray.")));
    }
  
    ecma_object_t *array_p = ecma_get_object_from_value (value);
    uint8_t shift = ecma_typedarray_get_element_size_shift (array_p);
  
    if (byte_length != NULL)
    {
      *byte_length = (jerry_length_t) (ecma_typedarray_get_length (array_p) << shift);
    }
  
    if (byte_offset != NULL)
    {
      *byte_offset = (jerry_length_t) ecma_typedarray_get_offset (array_p);
    }
  
    ecma_object_t *arraybuffer_p = ecma_typedarray_get_arraybuffer (array_p);
    ecma_ref_object (arraybuffer_p);
    return jerry_return (ecma_make_object_value (arraybuffer_p));
  #else /* !ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
    JERRY_UNUSED (value);
    JERRY_UNUSED (byte_length);
    JERRY_UNUSED (byte_offset);
    return jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG ("TypedArray is not supported.")));
  #endif /* ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY) */
  } /* jerry_get_typedarray_buffer */
  
  /**
   * Create an object from JSON
   *
   * Note:
   *      The returned value must be freed with jerry_release_value
   * @return jerry_value_t from json formated string or an error massage
   */
  jerry_value_t
  jerry_json_parse (const jerry_char_t *string_p, /**< json string */
                    jerry_size_t string_size) /**< json string size */
  {
    jerry_assert_api_available ();
  
  #if ENABLED (JERRY_BUILTIN_JSON)
    ecma_value_t ret_value = ecma_builtin_json_parse_buffer (string_p, string_size);
  
    if (ecma_is_value_undefined (ret_value))
    {
      ret_value = jerry_throw (ecma_raise_syntax_error (ECMA_ERR_MSG ("JSON string parse error.")));
    }
  
    return ret_value;
  #else /* !ENABLED (JERRY_BUILTIN_JSON) */
    JERRY_UNUSED (string_p);
    JERRY_UNUSED (string_size);
  
    return jerry_throw (ecma_raise_syntax_error (ECMA_ERR_MSG ("The JSON has been disabled.")));
  #endif /* ENABLED (JERRY_BUILTIN_JSON) */
  } /* jerry_json_parse */
  
  /**
   * Create a Json formated string from an object
   *
   * Note:
   *      The returned value must be freed with jerry_release_value
   * @return json formated jerry_value_t or an error massage
   */
  jerry_value_t
  jerry_json_stringify (const jerry_value_t object_to_stringify) /**< a jerry_object_t to stringify */
  {
    jerry_assert_api_available ();
  #if ENABLED (JERRY_BUILTIN_JSON)
    ecma_value_t ret_value = ecma_builtin_json_string_from_object (object_to_stringify);
  
    if (ecma_is_value_undefined (ret_value))
    {
      ret_value = jerry_throw (ecma_raise_syntax_error (ECMA_ERR_MSG ("JSON stringify error.")));
    }
  
    return ret_value;
  #else /* ENABLED (JERRY_BUILTIN_JSON) */
    JERRY_UNUSED (object_to_stringify);
  
    return jerry_throw (ecma_raise_syntax_error (ECMA_ERR_MSG ("The JSON has been disabled.")));
  #endif /* ENABLED (JERRY_BUILTIN_JSON) */
  } /* jerry_json_stringify */
  
  /**
   * @}
   */
  