自学教程：C++ ECMA_OP_TO_NUMBER_TRY_CATCH函数代码示例

/** * The Date.prototype object's 'setUTCMonth' routine * * See also: *          ECMA-262 v5, 15.9.5.39 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_date_prototype_set_utc_month (ecma_value_t this_arg, /**< this argument */                                           ecma_value_t month, /**< month */                                           ecma_value_t date) /**< date */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = *ecma_get_number_from_value (this_time_value);  /* 2. */  ECMA_OP_TO_NUMBER_TRY_CATCH (m, month, ret_value);  /* 3. */  ECMA_OP_TO_NUMBER_TRY_CATCH (dt, date, ret_value);  if (ecma_is_value_undefined (date))  {    dt = ecma_date_date_from_time (t);  }  /* 4-7. */  ecma_number_t year = ecma_date_year_from_time (t);  ret_value = ecma_date_set_internal_property (this_arg,                                               ecma_date_make_day (year, m, dt),                                               ecma_date_time_within_day (t),                                               ECMA_DATE_UTC);  ECMA_OP_TO_NUMBER_FINALIZE (dt);  ECMA_OP_TO_NUMBER_FINALIZE (m);  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_utc_month */

/** * The Date.prototype object's 'setUTCSeconds' routine * * See also: *          ECMA-262 v5, 15.9.5.31 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_date_prototype_set_utc_seconds (ecma_value_t this_arg, /**< this argument */                                             ecma_value_t sec, /**< second */                                             ecma_value_t ms) /**< millisecond */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = *ecma_get_number_from_value (this_time_value);  /* 2. */  ECMA_OP_TO_NUMBER_TRY_CATCH (s, sec, ret_value);  /* 3. */  ECMA_OP_TO_NUMBER_TRY_CATCH (milli, ms, ret_value);  if (ecma_is_value_undefined (ms))  {    milli = ecma_date_ms_from_time (t);  }  /* 4-7. */  ecma_number_t hour = ecma_date_hour_from_time (t);  ecma_number_t min = ecma_date_min_from_time (t);  ret_value = ecma_date_set_internal_property (this_arg,                                               ecma_date_day (t),                                               ecma_date_make_time (hour, min, s, milli),                                               ECMA_DATE_UTC);  ECMA_OP_TO_NUMBER_FINALIZE (milli);  ECMA_OP_TO_NUMBER_FINALIZE (s);  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_utc_seconds */

/** * The Date.prototype object's 'setUTCHours' routine * * See also: *          ECMA-262 v5, 15.9.5.35 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_date_prototype_set_utc_hours (ecma_value_t this_arg, /**< this argument */                                           const ecma_value_t args[], /**< arguments list */                                           ecma_length_t args_number) /**< number of arguments */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = *ecma_get_number_from_value (this_time_value);  /* 2. */  ecma_number_t h = ecma_number_make_nan ();  ecma_number_t m = ecma_date_min_from_time (t);  ecma_number_t s = ecma_date_sec_from_time (t);  ecma_number_t milli = ecma_date_ms_from_time (t);  if (args_number > 0 && !ecma_is_value_undefined (args[0]))  {    ECMA_OP_TO_NUMBER_TRY_CATCH (hour, args[0], ret_value);    h = hour;    /* 3. */    if (args_number > 1 && !ecma_is_value_undefined (args[1]))    {      ECMA_OP_TO_NUMBER_TRY_CATCH (min, args[1], ret_value);      m = min;      /* 4. */      if (args_number > 2 && !ecma_is_value_undefined (args[2]))      {        ECMA_OP_TO_NUMBER_TRY_CATCH (sec, args[2], ret_value);        s = sec;        /* 5. */        if (args_number > 3 && !ecma_is_value_undefined (args[3]))        {          ECMA_OP_TO_NUMBER_TRY_CATCH (ms, args[3], ret_value);          milli = ms;          ECMA_OP_TO_NUMBER_FINALIZE (ms);        }        ECMA_OP_TO_NUMBER_FINALIZE (sec);      }      ECMA_OP_TO_NUMBER_FINALIZE (min);    }    ECMA_OP_TO_NUMBER_FINALIZE (hour);  }  if (ecma_is_value_empty (ret_value))  {    /* 6-9. */    ret_value = ecma_date_set_internal_property (this_arg,                                                 ecma_date_day (t),                                                 ecma_date_make_time (h, m, s, milli),                                                 ECMA_DATE_UTC);  }  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_utc_hours */

/** * The Date.prototype object's 'setFullYear' routine * * See also: *          ECMA-262 v5, 15.9.5.40 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_date_prototype_set_full_year (ecma_value_t this_arg, /**< this argument */                                           const ecma_value_t args[], /**< arguments list */                                           ecma_length_t args_number) /**< number of arguments */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = ecma_date_local_time (*ecma_get_number_from_value (this_time_value));  if (ecma_number_is_nan (t))  {    t = ECMA_NUMBER_ZERO;  }  /* 2. */  ecma_number_t y = ecma_number_make_nan ();  ecma_number_t m = ecma_date_month_from_time (t);  ecma_number_t dt = ecma_date_date_from_time (t);  if (args_number > 0 && !ecma_is_value_undefined (args[0]))  {    ECMA_OP_TO_NUMBER_TRY_CATCH (year, args[0], ret_value);    y = year;    /* 3. */    if (args_number > 1 && !ecma_is_value_undefined (args[1]))    {      ECMA_OP_TO_NUMBER_TRY_CATCH (month, args[1], ret_value);      m = month;      /* 4. */      if (args_number > 2 && !ecma_is_value_undefined (args[2]))      {        ECMA_OP_TO_NUMBER_TRY_CATCH (date, args[2], ret_value);        dt = date;        ECMA_OP_TO_NUMBER_FINALIZE (date);      }      ECMA_OP_TO_NUMBER_FINALIZE (month);    }    ECMA_OP_TO_NUMBER_FINALIZE (year);  }  if (ecma_is_value_empty (ret_value))  {    /* 5-8. */    ret_value = ecma_date_set_internal_property (this_arg,                                                 ecma_date_make_day (y, m, dt),                                                 ecma_date_time_within_day (t),                                                 ECMA_DATE_LOCAL);  }  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_full_year */

/** * The Date.prototype object's 'setMinutes' routine * * See also: *          ECMA-262 v5, 15.9.5.32 * * @return completion value *         Returned value must be freed with ecma_free_completion_value. */static ecma_completion_value_tecma_builtin_date_prototype_set_minutes (ecma_value_t this_arg, /**< this argument */                                         const ecma_value_t args[], /**< arguments list */                                         ecma_length_t args_number) /**< number of arguments */{  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = ecma_date_local_time (*ecma_get_number_from_value (this_time_value));  /* 2. */  ecma_number_t m = ecma_number_make_nan ();  ecma_number_t s = ecma_date_sec_from_time (t);  ecma_number_t milli = ecma_date_ms_from_time (t);  if (args_number > 0 && !ecma_is_value_undefined (args[0]))  {    ECMA_OP_TO_NUMBER_TRY_CATCH (min, args[0], ret_value);    m = min;    /* 3. */    if (args_number > 1 && !ecma_is_value_undefined (args[1]))    {      ECMA_OP_TO_NUMBER_TRY_CATCH (sec, args[1], ret_value);      s = sec;      /* 4. */      if (args_number > 2 && !ecma_is_value_undefined (args[2]))      {        ECMA_OP_TO_NUMBER_TRY_CATCH (ms, args[2], ret_value);        milli = ms;        ECMA_OP_TO_NUMBER_FINALIZE (ms);      }      ECMA_OP_TO_NUMBER_FINALIZE (sec);    }    ECMA_OP_TO_NUMBER_FINALIZE (min);  }  if (ecma_is_completion_value_empty (ret_value))  {    /* 5-8. */    ecma_number_t hour = ecma_date_hour_from_time (t);    ret_value = ecma_date_set_internal_property (this_arg,                                                 ecma_date_day (t),                                                 ecma_date_make_time (hour, m, s, milli),                                                 ECMA_DATE_LOCAL);  }  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_minutes */

/** * The Date.prototype object's 'setUTCDate' routine * * See also: *          ECMA-262 v5, 15.9.5.37 * * @return completion value *         Returned value must be freed with ecma_free_completion_value. */static ecma_completion_value_tecma_builtin_date_prototype_set_utc_date (ecma_value_t this_arg, /**< this argument */                                          ecma_value_t date) /**< date */{  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = *ecma_get_number_from_value (this_time_value);  /* 2. */  ECMA_OP_TO_NUMBER_TRY_CATCH (dt, date, ret_value);  /* 3-6. */  ecma_number_t year = ecma_date_year_from_time (t);  ecma_number_t month = ecma_date_month_from_time (t);  ret_value = ecma_date_set_internal_property (this_arg,                                               ecma_date_make_day (year, month, dt),                                               ecma_date_time_within_day (t),                                               ECMA_DATE_UTC);  ECMA_OP_TO_NUMBER_FINALIZE (dt);  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_utc_date */

/** * The Date.prototype object's 'setUTCMilliseconds' routine * * See also: *          ECMA-262 v5, 15.9.5.29 * * @return completion value *         Returned value must be freed with ecma_free_completion_value. */static ecma_completion_value_tecma_builtin_date_prototype_set_utc_milliseconds (ecma_value_t this_arg, /**< this argument */                                                  ecma_value_t ms) /**< millisecond */{  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = *ecma_get_number_from_value (this_time_value);  /* 2. */  ECMA_OP_TO_NUMBER_TRY_CATCH (milli, ms, ret_value);  /* 3-5. */  ecma_number_t hour = ecma_date_hour_from_time (t);  ecma_number_t min = ecma_date_min_from_time (t);  ecma_number_t sec = ecma_date_sec_from_time (t);  ret_value = ecma_date_set_internal_property (this_arg,                                               ecma_date_day (t),                                               ecma_date_make_time (hour, min, sec, milli),                                               ECMA_DATE_UTC);  ECMA_OP_TO_NUMBER_FINALIZE (milli);  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_utc_milliseconds */

/** * The Date.prototype object's 'setDate' routine * * See also: *          ECMA-262 v5, 15.9.5.36 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_date_prototype_set_date (ecma_value_t this_arg, /**< this argument */                                      ecma_value_t date) /**< date */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = ecma_date_local_time (*ecma_get_number_from_value (this_time_value));  /* 2. */  ECMA_OP_TO_NUMBER_TRY_CATCH (dt, date, ret_value);  /* 3-6. */  ecma_number_t year = ecma_date_year_from_time (t);  ecma_number_t month = ecma_date_month_from_time (t);  ret_value = ecma_date_set_internal_property (this_arg,                                               ecma_date_make_day (year, month, dt),                                               ecma_date_time_within_day (t),                                               ECMA_DATE_LOCAL);  ECMA_OP_TO_NUMBER_FINALIZE (dt);  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_date */

/** * The Date.prototype object's 'setTime' routine * * See also: *          ECMA-262 v5, 15.9.5.27 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_date_prototype_set_time (ecma_value_t this_arg, /**< this argument */                                      ecma_value_t time) /**< time */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  if (!ecma_is_value_object (this_arg)      || ecma_object_get_class_name (ecma_get_object_from_value (this_arg)) != LIT_MAGIC_STRING_DATE_UL)  {    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Incompatible type"));  }  else  {    /* 1. */    ECMA_OP_TO_NUMBER_TRY_CATCH (t, time, ret_value);    ecma_number_t *value_p = ecma_alloc_number ();    *value_p = ecma_date_time_clip (t);    /* 2. */    ecma_object_t *obj_p = ecma_get_object_from_value (this_arg);    ecma_property_t *prim_prop_p = ecma_get_internal_property (obj_p,                                                               ECMA_INTERNAL_PROPERTY_PRIMITIVE_NUMBER_VALUE);    ecma_number_t *prim_value_num_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_number_t,                                                                       ecma_get_internal_property_value (prim_prop_p));    *prim_value_num_p = *value_p;    /* 3. */    ret_value = ecma_make_number_value (value_p);    ECMA_OP_TO_NUMBER_FINALIZE (t);  }  return ret_value;} /* ecma_builtin_date_prototype_set_time */

/** * The Date.prototype object's 'setMilliseconds' routine * * See also: *          ECMA-262 v5, 15.9.5.28 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_date_prototype_set_milliseconds (ecma_value_t this_arg, /**< this argument */                                              ecma_value_t ms) /**< millisecond */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = ecma_date_local_time (*ecma_get_number_from_value (this_time_value));  /* 2. */  ECMA_OP_TO_NUMBER_TRY_CATCH (milli, ms, ret_value);  /* 3-5. */  ecma_number_t hour = ecma_date_hour_from_time (t);  ecma_number_t min = ecma_date_min_from_time (t);  ecma_number_t sec = ecma_date_sec_from_time (t);  ret_value = ecma_date_set_internal_property (this_arg,                                               ecma_date_day (t),                                               ecma_date_make_time (hour, min, sec, milli),                                               ECMA_DATE_LOCAL);  ECMA_OP_TO_NUMBER_FINALIZE (milli);  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_milliseconds */

/** * The String.prototype object's 'charCodeAt' routine * * See also: *          ECMA-262 v5, 15.5.4.5 * * @return completion value *         Returned value must be freed with ecma_free_completion_value. */static ecma_completion_value_tecma_builtin_string_prototype_object_char_code_at (ecma_value_t this_arg, /**< this argument */                                                   ecma_value_t arg) /**< routine's argument */{  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();  /* 1 */  ECMA_TRY_CATCH (check_coercible_val,                  ecma_op_check_object_coercible (this_arg),                  ret_value);  /* 2 */  ECMA_TRY_CATCH (to_string_val,                  ecma_op_to_string (this_arg),                  ret_value);  /* 3 */  ECMA_OP_TO_NUMBER_TRY_CATCH (index_num,                               arg,                               ret_value);  /* 4 */  ecma_string_t *original_string_p = ecma_get_string_from_value (to_string_val);  const ecma_length_t len = ecma_string_get_length (original_string_p);  ecma_number_t *ret_num_p = ecma_alloc_number ();  /* 5 */  // When index_num is NaN, then the first two comparisons are false  if (index_num < 0 || index_num >= len || (ecma_number_is_nan (index_num) && !len))  {    *ret_num_p = ecma_number_make_nan ();  }  else  {    /* 6 */    /*     * String length is currently uit32_t, but index_num may be bigger,     * ToInteger performs floor, while ToUInt32 performs modulo 2^32,     * hence after the check 0 <= index_num < len we assume to_uint32 can be used.     * We assume to_uint32 (NaN) is 0.     */    JERRY_ASSERT (ecma_number_is_nan (index_num) || ecma_number_to_uint32 (index_num) == ecma_number_trunc (index_num));    ecma_char_t new_ecma_char = ecma_string_get_char_at_pos (original_string_p, ecma_number_to_uint32 (index_num));    *ret_num_p = ecma_uint32_to_number (new_ecma_char);  }  ecma_value_t new_value = ecma_make_number_value (ret_num_p);  ret_value = ecma_make_normal_completion_value (new_value);  ECMA_OP_TO_NUMBER_FINALIZE (index_num);  ECMA_FINALIZE (to_string_val);  ECMA_FINALIZE (check_coercible_val);  return ret_value;} /* ecma_builtin_string_prototype_object_char_code_at */

/** * Helper function for string indexOf and lastIndexOf functions * * This function implements string indexOf and lastIndexOf with required checks and conversions. * * See also: *          ECMA-262 v5, 15.5.4.7 *          ECMA-262 v5, 15.5.4.8 * * Used by: *         - The String.prototype.indexOf routine. *         - The String.prototype.lastIndexOf routine. * * @return uint32_t - (last) index of search string */ecma_value_tecma_builtin_helper_string_prototype_object_index_of (ecma_value_t this_arg, /**< this argument */                                                      ecma_value_t arg1, /**< routine's first argument */                                                      ecma_value_t arg2, /**< routine's second argument */                                                      bool first_index) /**< routine's third argument */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1 */  ECMA_TRY_CATCH (check_coercible_val,                  ecma_op_check_object_coercible (this_arg),                  ret_value);  /* 2 */  ECMA_TRY_CATCH (to_str_val,                  ecma_op_to_string (this_arg),                  ret_value);  /* 3 */  ECMA_TRY_CATCH (search_str_val,                  ecma_op_to_string (arg1),                  ret_value);  /* 4 */  ECMA_OP_TO_NUMBER_TRY_CATCH (pos_num,                               arg2,                               ret_value);  /* 5 (indexOf) -- 6 (lastIndexOf) */  ecma_string_t *original_str_p = ecma_get_string_from_value (to_str_val);  const ecma_length_t original_len = ecma_string_get_length (original_str_p);  /* 4b, 6 (indexOf) - 4b, 5, 7 (lastIndexOf) */  ecma_length_t start = ecma_builtin_helper_string_index_normalize (pos_num, original_len, first_index);  /* 7 (indexOf) -- 8 (lastIndexOf) */  ecma_string_t *search_str_p = ecma_get_string_from_value (search_str_val);  ecma_number_t ret_num = ECMA_NUMBER_MINUS_ONE;  /* 8 (indexOf) -- 9 (lastIndexOf) */  ecma_length_t index_of = 0;  if (ecma_builtin_helper_string_find_index (original_str_p, search_str_p, first_index, start, &index_of))  {    ret_num = ((ecma_number_t) index_of);  }  ret_value = ecma_make_number_value (ret_num);  ECMA_OP_TO_NUMBER_FINALIZE (pos_num);  ECMA_FINALIZE (search_str_val);  ECMA_FINALIZE (to_str_val);  ECMA_FINALIZE (check_coercible_val);  return ret_value;} /* ecma_builtin_helper_string_prototype_object_index_of */

/** * The Math object's 'pow' routine * * See also: *          ECMA-262 v5, 15.8.2.13 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_math_object_pow (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */                              ecma_value_t arg1, /**< first routine's argument */                              ecma_value_t arg2) /**< second routine's argument */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  ECMA_OP_TO_NUMBER_TRY_CATCH (x, arg1, ret_value);  ECMA_OP_TO_NUMBER_TRY_CATCH (y, arg2, ret_value);  ecma_number_t *num_p = ecma_alloc_number ();  *num_p = DOUBLE_TO_ECMA_NUMBER_T (pow (x, y));  ret_value = ecma_make_number_value (num_p);  ECMA_OP_TO_NUMBER_FINALIZE (y);  ECMA_OP_TO_NUMBER_FINALIZE (x);  return ret_value;} /* ecma_builtin_math_object_pow */

/** * The String object's 'fromCharCode' routine * * See also: *          ECMA-262 v5, 15.5.3.2 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_string_object_from_char_code (ecma_value_t this_arg, /**< 'this' argument */                                           const ecma_value_t args[], /**< arguments list */                                           ecma_length_t args_number) /**< number of arguments */{  JERRY_UNUSED (this_arg);  if (args_number == 0)  {    return ecma_make_magic_string_value (LIT_MAGIC_STRING__EMPTY);  }  ecma_value_t ret_value = ECMA_VALUE_EMPTY;  ecma_string_t *ret_string_p = NULL;  lit_utf8_size_t utf8_buf_size = args_number * LIT_CESU8_MAX_BYTES_IN_CODE_UNIT;  JMEM_DEFINE_LOCAL_ARRAY (utf8_buf_p,                           utf8_buf_size,                           lit_utf8_byte_t);  lit_utf8_size_t utf8_buf_used = 0;  for (ecma_length_t arg_index = 0;       arg_index < args_number && ecma_is_value_empty (ret_value);       arg_index++)  {    ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, args[arg_index], ret_value);    uint32_t uint32_char_code = ecma_number_to_uint32 (arg_num);    ecma_char_t code_unit = (uint16_t) uint32_char_code;    JERRY_ASSERT (utf8_buf_used <= utf8_buf_size - LIT_UTF8_MAX_BYTES_IN_CODE_UNIT);    utf8_buf_used += lit_code_unit_to_utf8 (code_unit, utf8_buf_p + utf8_buf_used);    JERRY_ASSERT (utf8_buf_used <= utf8_buf_size);    ECMA_OP_TO_NUMBER_FINALIZE (arg_num);  }  if (ecma_is_value_empty (ret_value))  {    ret_string_p = ecma_new_ecma_string_from_utf8 (utf8_buf_p, utf8_buf_used);  }  JMEM_FINALIZE_LOCAL_ARRAY (utf8_buf_p);  if (ecma_is_value_empty (ret_value))  {    ret_value = ecma_make_string_value (ret_string_p);  }  return ret_value;} /* ecma_builtin_string_object_from_char_code */

/** * The String object's 'fromCharCode' routine * * See also: *          ECMA-262 v5, 15.5.3.2 * * @return completion value *         Returned value must be freed with ecma_free_completion_value. */static ecma_completion_value_tecma_builtin_string_object_from_char_code (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */                                           const ecma_value_t args[], /**< arguments list */                                           ecma_length_t args_number) /**< number of arguments */{  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();  if (args_number == 0)  {    ecma_string_t *ret_str_p = ecma_new_ecma_string_from_utf8 (NULL, 0);    return ecma_make_normal_completion_value (ecma_make_string_value (ret_str_p));  }  lit_utf8_size_t utf8_buf_size = args_number * LIT_UTF8_MAX_BYTES_IN_CODE_UNIT;  ecma_string_t *ret_str_p;  MEM_DEFINE_LOCAL_ARRAY (utf8_buf_p, utf8_buf_size, lit_utf8_byte_t);  lit_utf8_size_t utf8_buf_used = 0;  FIXME ("Support surrogate pairs");  for (ecma_length_t arg_index = 0;       arg_index < args_number;       arg_index++)  {    ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, args[arg_index], ret_value);    uint32_t uint32_char_code = ecma_number_to_uint32 (arg_num);    ecma_char_t code_unit = (uint16_t) uint32_char_code;    JERRY_ASSERT (utf8_buf_used <= utf8_buf_size - LIT_UTF8_MAX_BYTES_IN_CODE_UNIT);    utf8_buf_used += lit_code_unit_to_utf8 (code_unit, utf8_buf_p + utf8_buf_used);    JERRY_ASSERT (utf8_buf_used <= utf8_buf_size);    ECMA_OP_TO_NUMBER_FINALIZE (arg_num);    if (ecma_is_completion_value_throw (ret_value))    {      mem_heap_free_block (utf8_buf_p);      return ret_value;    }    JERRY_ASSERT (ecma_is_completion_value_empty (ret_value));  }  ret_str_p = ecma_new_ecma_string_from_utf8 (utf8_buf_p, utf8_buf_used);  MEM_FINALIZE_LOCAL_ARRAY (utf8_buf_p);  return ecma_make_normal_completion_value (ecma_make_string_value (ret_str_p));} /* ecma_builtin_string_object_from_char_code */

/** * The Date.prototype object's 'setYear' routine * * See also: *          ECMA-262 v5, AnnexB.B.2.5 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_date_prototype_set_year (ecma_value_t this_arg, /**< this argument */                                      ecma_value_t year) /**< year argument */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  ECMA_TRY_CATCH (this_time_value, ecma_builtin_date_prototype_get_time (this_arg), ret_value);  ecma_number_t t = ecma_date_local_time (*ecma_get_number_from_value (this_time_value));  if (ecma_number_is_nan (t))  {    t = ECMA_NUMBER_ZERO;  }  /* 2. */  ecma_number_t y = ecma_number_make_nan ();  ECMA_OP_TO_NUMBER_TRY_CATCH (year_value, year, ret_value);  y = year_value;  /* 3. */  if (ecma_number_is_nan (y))  {    ret_value = ecma_date_set_internal_property (this_arg, 0, y, ECMA_DATE_UTC);  }  else  {    /* 4. */    if (y >= 0 && y <= 99)    {      y += 1900;    }  }  ECMA_OP_TO_NUMBER_FINALIZE (year_value);  if (ecma_is_value_empty (ret_value))  {    /* 5-8. */    ecma_number_t m = ecma_date_month_from_time (t);    ecma_number_t dt = ecma_date_date_from_time (t);    ret_value = ecma_date_set_internal_property (this_arg,                                                 ecma_date_make_day (y, m, dt),                                                 ecma_date_time_within_day (t),                                                 ECMA_DATE_UTC);  }  ECMA_FINALIZE (this_time_value);  return ret_value;} /* ecma_builtin_date_prototype_set_year */

/** * The Math object's 'sqrt' routine * * See also: *          ECMA-262 v5, 15.8.2.17 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_math_object_sqrt (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */                               ecma_value_t arg) /**< routine's argument */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);  ecma_number_t *num_p = ecma_alloc_number ();  *num_p = DOUBLE_TO_ECMA_NUMBER_T (sqrt (arg_num));  ret_value = ecma_make_number_value (num_p);  ECMA_OP_TO_NUMBER_FINALIZE (arg_num);  return ret_value;} /* ecma_builtin_math_object_sqrt */

/** * The String.prototype object's 'charAt' routine * * See also: *          ECMA-262 v5, 15.5.4.4 * * @return completion value *         Returned value must be freed with ecma_free_completion_value. */static ecma_completion_value_tecma_builtin_string_prototype_object_char_at (ecma_value_t this_arg, /**< this argument */                                              ecma_value_t arg) /**< routine's argument */{  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();  /* 1 */  ECMA_TRY_CATCH (check_coercible_val,                  ecma_op_check_object_coercible (this_arg),                  ret_value);  /* 2 */  ECMA_TRY_CATCH (to_string_val,                  ecma_op_to_string (this_arg),                  ret_value);  /* 3 */  ECMA_OP_TO_NUMBER_TRY_CATCH (index_num,                               arg,                               ret_value);  /* 4 */  ecma_string_t *original_string_p = ecma_get_string_from_value (to_string_val);  const ecma_length_t len = ecma_string_get_length (original_string_p);  /* 5 */  if (index_num < 0 || index_num >= len || !len)  {    ret_value = ecma_make_normal_completion_value (ecma_make_string_value (                                                   ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY)));  }  else  {    /* 6 */    ecma_char_t new_ecma_char = ecma_string_get_char_at_pos (original_string_p, ecma_number_to_uint32 (index_num));    ret_value = ecma_make_normal_completion_value (ecma_make_string_value (                                                   ecma_new_ecma_string_from_code_unit (new_ecma_char)));  }  ECMA_OP_TO_NUMBER_FINALIZE (index_num);  ECMA_FINALIZE (to_string_val);  ECMA_FINALIZE (check_coercible_val);  return ret_value;} /* ecma_builtin_string_prototype_object_char_at */

/** * The Math object's 'round' routine * * See also: *          ECMA-262 v5, 15.8.2.15 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_math_object_round (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */                                ecma_value_t arg) /**< routine's argument */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);  ecma_number_t *num_p = ecma_alloc_number ();  if (ecma_number_is_nan (arg_num)      || ecma_number_is_zero (arg_num)      || ecma_number_is_infinity (arg_num))  {    *num_p = arg_num;  }  else if (ecma_number_is_negative (arg_num)           && arg_num >= -0.5f)  {    *num_p = ecma_number_negate (0.0f);  }  else  {    const ecma_number_t up_half = arg_num + 0.5f;    const ecma_number_t down_half = arg_num - 0.5f;    const ecma_number_t up_rounded = up_half - ecma_op_number_remainder (up_half, 1);    const ecma_number_t down_rounded = down_half - ecma_op_number_remainder (down_half, 1);    if (up_rounded - arg_num <= arg_num - down_rounded)    {      *num_p = up_rounded;    }    else    {      *num_p = down_rounded;    }  }  ret_value = ecma_make_number_value (num_p);  ECMA_OP_TO_NUMBER_FINALIZE (arg_num);  return ret_value;} /* ecma_builtin_math_object_round */

/* * Helper function for string indexOf and lastIndexOf functions * * This function implements string indexOf and lastIndexOf with required checks and conversions. * * See also: *          ECMA-262 v5, 15.5.4.7 *          ECMA-262 v5, 15.5.4.8 * * Used by: *         - The String.prototype.indexOf routine. *         - The String.prototype.lastIndexOf routine. * * @return uint32_t - (last)index of search string */ecma_completion_value_tecma_builtin_helper_string_prototype_object_index_of (ecma_value_t this_arg, /**< this argument */                                                      ecma_value_t arg1, /**< routine's first argument */                                                      ecma_value_t arg2, /**< routine's second argument */                                                      bool firstIndex) /**< routine's third argument */{  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();  /* 1 */  ECMA_TRY_CATCH (check_coercible_val,                  ecma_op_check_object_coercible (this_arg),                  ret_value);  /* 2 */  ECMA_TRY_CATCH (to_str_val,                  ecma_op_to_string (this_arg),                  ret_value);  /* 3 */  ECMA_TRY_CATCH (search_str_val,                  ecma_op_to_string (arg1),                  ret_value);  /* 4 */  ECMA_OP_TO_NUMBER_TRY_CATCH (pos_num,                               arg2,                               ret_value);  /* 6 */  ecma_string_t *original_str_p = ecma_get_string_from_value (to_str_val);  const ecma_length_t original_len = ecma_string_get_length (original_str_p);  const lit_utf8_size_t original_size = ecma_string_get_size (original_str_p);  /* 4b, 5, 7 */  ecma_length_t start = ecma_builtin_helper_string_index_normalize (pos_num, original_len, firstIndex);  /* 8 */  ecma_string_t *search_str_p = ecma_get_string_from_value (search_str_val);  const ecma_length_t search_len = ecma_string_get_length (search_str_p);  const lit_utf8_size_t search_size = ecma_string_get_size (search_str_p);  ecma_number_t *ret_num_p = ecma_alloc_number ();  *ret_num_p = ecma_int32_to_number (-1);  /* 9 */  if (search_len <= original_len)  {    if (!search_len)    {      *ret_num_p = ecma_uint32_to_number (firstIndex ? 0 : original_len);    }    else    {      /* create utf8 string from original string and advance to position */      MEM_DEFINE_LOCAL_ARRAY (original_str_utf8_p,                              original_size,                              lit_utf8_byte_t);      ecma_string_to_utf8_string (original_str_p,                                  original_str_utf8_p,                                  (ssize_t) (original_size));      lit_utf8_iterator_t original_it = lit_utf8_iterator_create (original_str_utf8_p, original_size);      ecma_length_t index = start;      lit_utf8_iterator_advance (&original_it, index);      /* create utf8 string from search string */      MEM_DEFINE_LOCAL_ARRAY (search_str_utf8_p,                              search_size,                              lit_utf8_byte_t);      ecma_string_to_utf8_string (search_str_p,                                  search_str_utf8_p,                                  (ssize_t) (search_size));      lit_utf8_iterator_t search_it = lit_utf8_iterator_create (search_str_utf8_p, search_size);      /* iterate original string and try to match at each position */      bool searching = true;      while (searching)      {        /* match as long as possible */        ecma_length_t match_len = 0;//.........这里部分代码省略.........

/** * Helper function for concatenating an ecma_value_t to an Array. * * See also: *          ECMA-262 v5, 15.4.4.4 steps 5.b - 5.c * * Used by: *         - The Array.prototype.concat routine. * * @return completion value *         Returned value must be freed with ecma_free_completion_value. */ecma_completion_value_tecma_builtin_helper_array_concat_value (ecma_object_t *obj_p, /**< array */                                        uint32_t *length_p, /**< in-out: array's length */                                        ecma_value_t value) /**< value to concat */{  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();  /* 5.b */  if (ecma_is_value_object (value)      && (ecma_object_get_class_name (ecma_get_object_from_value (value)) == LIT_MAGIC_STRING_ARRAY_UL))  {    ecma_string_t *magic_string_length_p = ecma_get_magic_string (LIT_MAGIC_STRING_LENGTH);    /* 5.b.ii */    ECMA_TRY_CATCH (arg_len_value,                    ecma_op_object_get (ecma_get_object_from_value (value),                                        magic_string_length_p),                    ret_value);    ECMA_OP_TO_NUMBER_TRY_CATCH (arg_len_number, arg_len_value, ret_value);    uint32_t arg_len = ecma_number_to_uint32 (arg_len_number);    /* 5.b.iii */    for (uint32_t array_index = 0;         array_index < arg_len && ecma_is_completion_value_empty (ret_value);         array_index++)    {      ecma_string_t *array_index_string_p = ecma_new_ecma_string_from_uint32 (array_index);      /* 5.b.iii.2 */      if (ecma_op_object_get_property (ecma_get_object_from_value (value),                                       array_index_string_p) != NULL)      {        ecma_string_t *new_array_index_string_p = ecma_new_ecma_string_from_uint32 (*length_p + array_index);        /* 5.b.iii.3.a */        ECMA_TRY_CATCH (get_value,                        ecma_op_object_get (ecma_get_object_from_value (value),                                            array_index_string_p),                        ret_value);        ecma_property_descriptor_t prop_desc = ecma_make_empty_property_descriptor ();        {          prop_desc.is_value_defined = true;          prop_desc.value = get_value;          prop_desc.is_writable_defined = true;          prop_desc.is_writable = true;          prop_desc.is_enumerable_defined = true;          prop_desc.is_enumerable = true;          prop_desc.is_configurable_defined = true;          prop_desc.is_configurable = true;        }        /* 5.b.iii.3.b */        /* This will always be a simple value since 'is_throw' is false, so no need to free. */        ecma_completion_value_t put_comp = ecma_op_object_define_own_property (obj_p,                                                                               new_array_index_string_p,                                                                               &prop_desc,                                                                               false);        JERRY_ASSERT (ecma_is_completion_value_normal_true (put_comp));        ECMA_FINALIZE (get_value);        ecma_deref_ecma_string (new_array_index_string_p);      }      ecma_deref_ecma_string (array_index_string_p);    }    *length_p += arg_len;    ECMA_OP_TO_NUMBER_FINALIZE (arg_len_number);    ECMA_FINALIZE (arg_len_value);    ecma_deref_ecma_string (magic_string_length_p);  }  else  {    ecma_string_t *new_array_index_string_p = ecma_new_ecma_string_from_uint32 ((*length_p)++);    ecma_property_descriptor_t prop_desc = ecma_make_empty_property_descriptor ();    {      prop_desc.is_value_defined = true;      prop_desc.value = value;      prop_desc.is_writable_defined = true;      prop_desc.is_writable = true;//.........这里部分代码省略.........

/** * The Function.prototype object's 'apply' routine * * See also: *          ECMA-262 v5, 15.3.4.3 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_function_prototype_object_apply (ecma_value_t this_arg, /**< this argument */                                              ecma_value_t arg1, /**< first argument */                                              ecma_value_t arg2) /**< second argument */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  if (!ecma_op_is_callable (this_arg))  {    ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));  }  else  {    ecma_object_t *func_obj_p = ecma_get_object_from_value (this_arg);    /* 2. */    if (ecma_is_value_null (arg2) || ecma_is_value_undefined (arg2))    {      ret_value = ecma_op_function_call (func_obj_p, arg1, NULL, 0);    }    else    {      /* 3. */      if (!ecma_is_value_object (arg2))      {        ret_value = ecma_raise_type_error (ECMA_ERR_MSG (""));      }      else      {        ecma_object_t *obj_p = ecma_get_object_from_value (arg2);        ecma_string_t *length_magic_string_p = ecma_new_ecma_length_string ();        /* 4. */        ECMA_TRY_CATCH (length_value,                        ecma_op_object_get (obj_p, length_magic_string_p),                        ret_value);        ECMA_OP_TO_NUMBER_TRY_CATCH (length_number,                                     length_value,                                     ret_value);        /* 5. */        const uint32_t length = ecma_number_to_uint32 (length_number);        /* 6. */        JMEM_DEFINE_LOCAL_ARRAY (arguments_list_p, length, ecma_value_t);        uint32_t last_index = 0;        /* 7. */        for (uint32_t index = 0;             index < length && ecma_is_value_empty (ret_value);             index++)        {          ecma_string_t *curr_idx_str_p = ecma_new_ecma_string_from_uint32 (index);          ECMA_TRY_CATCH (get_value,                          ecma_op_object_get (obj_p, curr_idx_str_p),                          ret_value);          arguments_list_p[index] = ecma_copy_value (get_value);          last_index = index + 1;          ECMA_FINALIZE (get_value);          ecma_deref_ecma_string (curr_idx_str_p);        }        if (ecma_is_value_empty (ret_value))        {          JERRY_ASSERT (last_index == length);          ret_value = ecma_op_function_call (func_obj_p,                                             arg1,                                             arguments_list_p,                                             length);        }        for (uint32_t index = 0; index < last_index; index++)        {          ecma_free_value (arguments_list_p[index]);        }        JMEM_FINALIZE_LOCAL_ARRAY (arguments_list_p);        ECMA_OP_TO_NUMBER_FINALIZE (length_number);        ECMA_FINALIZE (length_value);        ecma_deref_ecma_string (length_magic_string_p);      }    }  }  return ret_value;//.........这里部分代码省略.........

/** * Dispatcher of the built-in's routines * * @return ecma value *         Returned value must be freed with ecma_free_value. */ecma_value_tecma_builtin_date_prototype_dispatch_routine (uint16_t builtin_routine_id, /**< built-in wide routine                                                                            *   identifier */                                              ecma_value_t this_arg, /**< 'this' argument value */                                              const ecma_value_t arguments_list[], /**< list of arguments                                                                                    *   passed to routine */                                              ecma_length_t arguments_number) /**< length of arguments' list */{  if (JERRY_UNLIKELY (builtin_routine_id == ECMA_DATE_PROTOTYPE_TO_JSON))  {    return ecma_builtin_date_prototype_to_json (this_arg);  }  if (!ecma_is_value_object (this_arg)      || !ecma_object_class_is (ecma_get_object_from_value (this_arg), LIT_MAGIC_STRING_DATE_UL))  {    return ecma_raise_type_error (ECMA_ERR_MSG ("Date object expected"));  }  ecma_object_t *object_p = ecma_get_object_from_value (this_arg);  ecma_extended_object_t *ext_object_p = (ecma_extended_object_t *) object_p;  ecma_number_t *prim_value_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_number_t,                                                                 ext_object_p->u.class_prop.u.value);  if (builtin_routine_id == ECMA_DATE_PROTOTYPE_GET_TIME)  {    return ecma_make_number_value (*prim_value_p);  }  if (builtin_routine_id == ECMA_DATE_PROTOTYPE_SET_TIME)  {    ecma_value_t time = (arguments_number >= 1 ? arguments_list[0]                                               : ECMA_VALUE_UNDEFINED);    ecma_value_t ret_value = ECMA_VALUE_EMPTY;    /* 1. */    ECMA_OP_TO_NUMBER_TRY_CATCH (time_num, time, ret_value);    *prim_value_p = ecma_date_time_clip (time_num);    ret_value = ecma_make_number_value (time_num);    ECMA_OP_TO_NUMBER_FINALIZE (time_num);    return ret_value;  }  if (builtin_routine_id <= ECMA_DATE_PROTOTYPE_SET_UTC_MILLISECONDS)  {    ecma_number_t this_num = *prim_value_p;    if (!BUILTIN_DATE_FUNCTION_IS_UTC (builtin_routine_id))    {      this_num += ecma_date_local_time_zone (this_num);    }    if (builtin_routine_id <= ECMA_DATE_PROTOTYPE_GET_UTC_TIMEZONE_OFFSET)    {      return ecma_builtin_date_prototype_dispatch_get (builtin_routine_id, this_num);    }    return ecma_builtin_date_prototype_dispatch_set (builtin_routine_id,                                                     ext_object_p,                                                     this_num,                                                     arguments_list,                                                     arguments_number);  }  if (builtin_routine_id == ECMA_DATE_PROTOTYPE_TO_ISO_STRING)  {    if (ecma_number_is_nan (*prim_value_p) || ecma_number_is_infinity (*prim_value_p))    {      return ecma_raise_range_error (ECMA_ERR_MSG ("Date must be a finite number."));    }    return ecma_date_value_to_iso_string (*prim_value_p);  }  if (ecma_number_is_nan (*prim_value_p))  {    return ecma_make_magic_string_value (LIT_MAGIC_STRING_INVALID_DATE_UL);  }  switch (builtin_routine_id)  {    case ECMA_DATE_PROTOTYPE_TO_STRING:    {      return ecma_date_value_to_string (*prim_value_p);    }    case ECMA_DATE_PROTOTYPE_TO_DATE_STRING:    {      return ecma_date_value_to_date_string (*prim_value_p);    }    case ECMA_DATE_PROTOTYPE_TO_TIME_STRING://.........这里部分代码省略.........

/** * RegExp helper function to start the recursive matching algorithm * and create the result Array object * * @return completion value *         Returned value must be freed with ecma_free_completion_value */ecma_completion_value_tecma_regexp_exec_helper (ecma_value_t regexp_value, /**< RegExp object */                         ecma_value_t input_string, /**< input string */                         bool ignore_global) /**< ignore global flag */{  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();  JERRY_ASSERT (ecma_is_value_object (regexp_value));  JERRY_ASSERT (ecma_is_value_string (input_string));  ecma_object_t *regexp_object_p = ecma_get_object_from_value (regexp_value);  JERRY_ASSERT (ecma_object_get_class_name (regexp_object_p) == LIT_MAGIC_STRING_REGEXP_UL);  ecma_property_t *bytecode_prop_p = ecma_get_internal_property (regexp_object_p,                                                                 ECMA_INTERNAL_PROPERTY_REGEXP_BYTECODE);  re_bytecode_t *bc_p = ECMA_GET_POINTER (re_bytecode_t, bytecode_prop_p->u.internal_property.value);  ecma_string_t *input_string_p = ecma_get_string_from_value (input_string);  lit_utf8_size_t input_string_size = ecma_string_get_size (input_string_p);  MEM_DEFINE_LOCAL_ARRAY (input_utf8_buffer_p, input_string_size, lit_utf8_byte_t);  ecma_string_to_utf8_string (input_string_p, input_utf8_buffer_p, (ssize_t) input_string_size);  lit_utf8_iterator_t iterator = lit_utf8_iterator_create (input_utf8_buffer_p, input_string_size);  re_matcher_ctx_t re_ctx;  re_ctx.input_start_p = iterator.buf_p;  re_ctx.input_end_p = iterator.buf_p + iterator.buf_size;  /* 1. Read bytecode header and init regexp matcher context. */  re_ctx.flags = (uint8_t) re_get_value (&bc_p);  if (ignore_global)  {    re_ctx.flags &= (uint8_t) ~RE_FLAG_GLOBAL;  }  JERRY_DDLOG ("Exec with flags [global: %d, ignoreCase: %d, multiline: %d]/n",               re_ctx.flags & RE_FLAG_GLOBAL,               re_ctx.flags & RE_FLAG_IGNORE_CASE,               re_ctx.flags & RE_FLAG_MULTILINE);  re_ctx.num_of_captures = re_get_value (&bc_p);  JERRY_ASSERT (re_ctx.num_of_captures % 2 == 0);  re_ctx.num_of_non_captures = re_get_value (&bc_p);  /* We create an invalid iterator, that will be used to identify unused result values. */  lit_utf8_iterator_t unused_iter = lit_utf8_iterator_create (NULL, 0);  unused_iter.buf_p = (lit_utf8_byte_t *) 1;  MEM_DEFINE_LOCAL_ARRAY (saved_p, re_ctx.num_of_captures + re_ctx.num_of_non_captures, lit_utf8_iterator_t);  for (uint32_t i = 0; i < re_ctx.num_of_captures + re_ctx.num_of_non_captures; i++)  {    saved_p[i] = unused_iter;  }  re_ctx.saved_p = saved_p;  uint32_t num_of_iter_length = (re_ctx.num_of_captures / 2) + (re_ctx.num_of_non_captures - 1);  MEM_DEFINE_LOCAL_ARRAY (num_of_iter_p, num_of_iter_length, uint32_t);  for (uint32_t i = 0; i < num_of_iter_length; i++)  {    num_of_iter_p[i] = 0u;  }  bool is_match = false;  re_ctx.num_of_iterations_p = num_of_iter_p;  int32_t index = 0;  ecma_length_t input_str_len = lit_utf8_string_length (iterator.buf_p, iterator.buf_size);  if (iterator.buf_p && (re_ctx.flags & RE_FLAG_GLOBAL))  {    ecma_string_t *magic_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_LASTINDEX_UL);    ecma_property_t *lastindex_prop_p = ecma_op_object_get_property (regexp_object_p, magic_str_p);    ECMA_OP_TO_NUMBER_TRY_CATCH (lastindex_num, lastindex_prop_p->u.named_data_property.value, ret_value)    index = ecma_number_to_int32 (lastindex_num);    JERRY_ASSERT (iterator.buf_pos.offset == 0 && !iterator.buf_pos.is_non_bmp_middle);    if (!lit_utf8_iterator_is_eos (&iterator)        && index <= (int32_t) input_str_len        && index > 0)    {      lit_utf8_iterator_advance (&iterator, (ecma_length_t) index);    }    ECMA_OP_TO_NUMBER_FINALIZE (lastindex_num);    ecma_deref_ecma_string (magic_str_p);  }  /* 2. Try to match */  lit_utf8_iterator_t sub_iter = lit_utf8_iterator_create (NULL, 0);//.........这里部分代码省略.........

/** * Helper function for concatenating an ecma_value_t to an Array. * * See also: *          ECMA-262 v5, 15.4.4.4 steps 5.b - 5.c * * Used by: *         - The Array.prototype.concat routine. * * @return ecma value *         Returned value must be freed with ecma_free_value. */ecma_value_tecma_builtin_helper_array_concat_value (ecma_object_t *obj_p, /**< array */                                        uint32_t *length_p, /**< [in,out] array's length */                                        ecma_value_t value) /**< value to concat */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 5.b */  if (ecma_is_value_object (value)      && (ecma_object_get_class_name (ecma_get_object_from_value (value)) == LIT_MAGIC_STRING_ARRAY_UL))  {    ecma_string_t *magic_string_length_p = ecma_new_ecma_length_string ();    /* 5.b.ii */    ECMA_TRY_CATCH (arg_len_value,                    ecma_op_object_get (ecma_get_object_from_value (value),                                        magic_string_length_p),                    ret_value);    ECMA_OP_TO_NUMBER_TRY_CATCH (arg_len_number, arg_len_value, ret_value);    uint32_t arg_len = ecma_number_to_uint32 (arg_len_number);    /* 5.b.iii */    for (uint32_t array_index = 0;         array_index < arg_len && ecma_is_value_empty (ret_value);         array_index++)    {      ecma_string_t *array_index_string_p = ecma_new_ecma_string_from_uint32 (array_index);      /* 5.b.iii.2 */      if (ecma_op_object_get_property (ecma_get_object_from_value (value),                                       array_index_string_p) != NULL)      {        ecma_string_t *new_array_index_string_p = ecma_new_ecma_string_from_uint32 (*length_p + array_index);        /* 5.b.iii.3.a */        ECMA_TRY_CATCH (get_value,                        ecma_op_object_get (ecma_get_object_from_value (value),                                            array_index_string_p),                        ret_value);        /* 5.b.iii.3.b */        /* This will always be a simple value since 'is_throw' is false, so no need to free. */        ecma_value_t put_comp = ecma_builtin_helper_def_prop (obj_p,                                                              new_array_index_string_p,                                                              get_value,                                                              true, /* Writable */                                                              true, /* Enumerable */                                                              true, /* Configurable */                                                              false); /* Failure handling */        JERRY_ASSERT (ecma_is_value_true (put_comp));        ECMA_FINALIZE (get_value);        ecma_deref_ecma_string (new_array_index_string_p);      }      ecma_deref_ecma_string (array_index_string_p);    }    *length_p += arg_len;    ECMA_OP_TO_NUMBER_FINALIZE (arg_len_number);    ECMA_FINALIZE (arg_len_value);    ecma_deref_ecma_string (magic_string_length_p);  }  else  {    ecma_string_t *new_array_index_string_p = ecma_new_ecma_string_from_uint32 ((*length_p)++);    /* 5.c.i */    /* This will always be a simple value since 'is_throw' is false, so no need to free. */    ecma_value_t put_comp = ecma_builtin_helper_def_prop (obj_p,                                                          new_array_index_string_p,                                                          value,                                                          true, /* Writable */                                                          true, /* Enumerable */                                                          true, /* Configurable */                                                          false); /* Failure handling */    JERRY_ASSERT (ecma_is_value_true (put_comp));    ecma_deref_ecma_string (new_array_index_string_p);  }  if (ecma_is_value_empty (ret_value))  {    ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_TRUE);  }//.........这里部分代码省略.........

/** * ECMA abstract relational comparison routine. * * See also: ECMA-262 v5, 11.8.5 * * @return ecma value *         Returned value must be freed with ecma_free_value */ecma_value_tecma_op_abstract_relational_compare (ecma_value_t x, /**< first operand */                                     ecma_value_t y, /**< second operand */                                     bool left_first) /**< 'LeftFirst' flag */{  ecma_value_t ret_value = ECMA_VALUE_EMPTY;  /* 1., 2. */  ecma_value_t prim_first_converted_value = ecma_op_to_primitive (x, ECMA_PREFERRED_TYPE_NUMBER);  if (ECMA_IS_VALUE_ERROR (prim_first_converted_value))  {    return prim_first_converted_value;  }  ecma_value_t prim_second_converted_value = ecma_op_to_primitive (y, ECMA_PREFERRED_TYPE_NUMBER);  if (ECMA_IS_VALUE_ERROR (prim_second_converted_value))  {    ecma_free_value (prim_first_converted_value);    return prim_second_converted_value;  }  const ecma_value_t px = left_first ? prim_first_converted_value : prim_second_converted_value;  const ecma_value_t py = left_first ? prim_second_converted_value : prim_first_converted_value;  const bool is_px_string = ecma_is_value_string (px);  const bool is_py_string = ecma_is_value_string (py);  if (!(is_px_string && is_py_string))  {    /* 3. */    /* a. */    ECMA_OP_TO_NUMBER_TRY_CATCH (nx, px, ret_value);    ECMA_OP_TO_NUMBER_TRY_CATCH (ny, py, ret_value);    /* b. */    if (ecma_number_is_nan (nx)        || ecma_number_is_nan (ny))    {      /* c., d. */      ret_value = ECMA_VALUE_UNDEFINED;    }    else    {      bool is_x_less_than_y = (nx < ny);#ifndef JERRY_NDEBUG      bool is_x_less_than_y_check;      if (nx == ny          || (ecma_number_is_zero (nx)              && ecma_number_is_zero (ny)))      {        /* e., f., g. */        is_x_less_than_y_check = false;      }      else if (ecma_number_is_infinity (nx)               && !ecma_number_is_negative (nx))      {        /* h. */        is_x_less_than_y_check = false;      }      else if (ecma_number_is_infinity (ny)               && !ecma_number_is_negative (ny))      {        /* i. */        is_x_less_than_y_check = true;      }      else if (ecma_number_is_infinity (ny)               && ecma_number_is_negative (ny))      {        /* j. */        is_x_less_than_y_check = false;      }      else if (ecma_number_is_infinity (nx)               && ecma_number_is_negative (nx))      {        /* k. */        is_x_less_than_y_check = true;      }      else      {        /* l. */        JERRY_ASSERT (!ecma_number_is_nan (nx)                      && !ecma_number_is_infinity (nx));        JERRY_ASSERT (!ecma_number_is_nan (ny)                      && !ecma_number_is_infinity (ny));        JERRY_ASSERT (!(ecma_number_is_zero (nx)                        && ecma_number_is_zero (ny)));        if (nx < ny)        {//.........这里部分代码省略.........

/** * The Number.prototype object's 'toPrecision' routine * * See also: *          ECMA-262 v5, 15.7.4.7 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_number_prototype_object_to_precision (ecma_value_t this_arg, /**< this argument */                                                   ecma_value_t arg) /**< routine's argument */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);  ecma_number_t this_num = ecma_get_number_from_value (this_value);  /* 2. */  if (ecma_is_value_undefined (arg))  {    ret_value = ecma_builtin_number_prototype_object_to_string (this_arg, NULL, 0);  }  else  {    /* 3. */    ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);    /* 4. */    if (ecma_number_is_nan (this_num))    {      ecma_string_t *nan_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_NAN);      ret_value = ecma_make_string_value (nan_str_p);    }    else    {      /* 6. */      bool is_negative = false;      if (ecma_number_is_negative (this_num) && !ecma_number_is_zero (this_num))      {        is_negative = true;        this_num *= -1;      }      /* 7. */      if (ecma_number_is_infinity (this_num))      {        ecma_string_t *infinity_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_INFINITY_UL);        if (is_negative)        {          ecma_string_t *neg_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_MINUS_CHAR);          ecma_string_t *neg_inf_str_p = ecma_concat_ecma_strings (neg_str_p, infinity_str_p);          ecma_deref_ecma_string (infinity_str_p);          ecma_deref_ecma_string (neg_str_p);          ret_value = ecma_make_string_value (neg_inf_str_p);        }        else        {          ret_value = ecma_make_string_value (infinity_str_p);        }      }      /* 8. */      else if (arg_num < 1.0 || arg_num >= 22.0)      {        ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));      }      else      {        /* Get the parameters of the number if non-zero. */        lit_utf8_byte_t digits[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];        lit_utf8_size_t num_digits;        int32_t exponent;        if (!ecma_number_is_zero (this_num))        {          num_digits = ecma_number_to_decimal (this_num, digits, &exponent);        }        else        {          digits[0] = '0';          num_digits = 1;          exponent = 1;        }        int32_t precision = ecma_number_to_int32 (arg_num);        num_digits = ecma_builtin_number_prototype_helper_round (digits, num_digits, precision);        int buffer_size;        if (exponent  < -5 || exponent > precision)        {          /* Exponential notation, precision + 1 digits for number, 5 for exponent, 1 for /0 */          buffer_size = precision + 1 + 5 + 1;        }        else if (exponent <= 0)        {          /* Fixed notation, -exponent + 2 digits for leading zeros, precision digits, 1 for /0 */          buffer_size = -exponent + 2 + precision + 1;//.........这里部分代码省略.........

/** * The Number.prototype object's 'toExponential' routine * * See also: *          ECMA-262 v5, 15.7.4.6 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_number_prototype_object_to_exponential (ecma_value_t this_arg, /**< this argument */                                                     ecma_value_t arg) /**< routine's argument */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  /* 1. */  ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);  ecma_number_t this_num = ecma_get_number_from_value (this_value);  ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);  /* 7. */  if (arg_num <= -1.0 || arg_num >= 21.0)  {    ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));  }  else  {    /* 3. */    if (ecma_number_is_nan (this_num))    {      ecma_string_t *nan_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_NAN);      ret_value = ecma_make_string_value (nan_str_p);    }    else    {      /* 5. */      bool is_negative = false;      if (ecma_number_is_negative (this_num) && !ecma_number_is_zero (this_num))      {        is_negative = true;        this_num *= -1;      }      /* 6. */      if (ecma_number_is_infinity (this_num))      {        ecma_string_t *infinity_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_INFINITY_UL);        if (is_negative)        {          ecma_string_t *neg_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_MINUS_CHAR);          ecma_string_t *neg_inf_str_p = ecma_concat_ecma_strings (neg_str_p, infinity_str_p);          ecma_deref_ecma_string (infinity_str_p);          ecma_deref_ecma_string (neg_str_p);          ret_value = ecma_make_string_value (neg_inf_str_p);        }        else        {          ret_value = ecma_make_string_value (infinity_str_p);        }      }      else      {        /* Get the parameters of the number if non zero. */        lit_utf8_byte_t digits[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];        lit_utf8_size_t num_digits;        int32_t exponent;        if (!ecma_number_is_zero (this_num))        {          num_digits = ecma_number_to_decimal (this_num, digits, &exponent);        }        else        {          digits[0] = '0';          num_digits = 1;          exponent = 1;        }        int32_t frac_digits;        if (ecma_is_value_undefined (arg))        {          frac_digits = (int32_t) num_digits - 1;        }        else        {          frac_digits = ecma_number_to_int32 (arg_num);        }        num_digits = ecma_builtin_number_prototype_helper_round (digits, num_digits, frac_digits + 1);        /* frac_digits + 2 characters for number, 5 characters for exponent, 1 for /0. */        int buffer_size = frac_digits + 2 + 5 + 1;        if (is_negative)        {          /* +1 character for sign. */          buffer_size++;        }//.........这里部分代码省略.........

/** * The Number.prototype object's 'toFixed' routine * * See also: *          ECMA-262 v5, 15.7.4.5 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_number_prototype_object_to_fixed (ecma_value_t this_arg, /**< this argument */                                               ecma_value_t arg) /**< routine's argument */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);  ecma_number_t this_num = ecma_get_number_from_value (this_value);  ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arg, ret_value);  /* 2. */  if (arg_num <= -1 || arg_num >= 21)  {    ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));  }  else  {    /* 4. */    if (ecma_number_is_nan (this_num))    {      ecma_string_t *nan_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_NAN);      ret_value = ecma_make_string_value (nan_str_p);    }    else    {      /* 6. */      bool is_negative = false;      if (ecma_number_is_negative (this_num))      {        is_negative = true;        this_num *= -1;      }      /* We handle infinities separately. */      if (ecma_number_is_infinity (this_num))      {        ecma_string_t *infinity_str_p = ecma_get_magic_string (LIT_MAGIC_STRING_INFINITY_UL);        if (is_negative)        {          ecma_string_t *neg_str_p = ecma_new_ecma_string_from_utf8 ((const lit_utf8_byte_t *) "-", 1);          ecma_string_t *neg_inf_str_p = ecma_concat_ecma_strings (neg_str_p, infinity_str_p);          ecma_deref_ecma_string (infinity_str_p);          ecma_deref_ecma_string (neg_str_p);          ret_value = ecma_make_string_value (neg_inf_str_p);        }        else        {          ret_value = ecma_make_string_value (infinity_str_p);        }      }      else      {        /* Get the parameters of the number if non-zero. */        lit_utf8_byte_t digits[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];        lit_utf8_size_t num_digits;        int32_t exponent;        if (!ecma_number_is_zero (this_num))        {          num_digits = ecma_number_to_decimal (this_num, digits, &exponent);        }        else        {          digits[0] = '0';          num_digits = 1;          exponent = 1;        }        /* 7. */        if (exponent > 21)        {          ret_value = ecma_builtin_number_prototype_object_to_string (this_arg, NULL, 0);        }        /* 8. */        else        {          /* 1. */          int32_t frac_digits = ecma_number_to_int32 (arg_num);          num_digits = ecma_builtin_number_prototype_helper_round (digits, num_digits, exponent + frac_digits);          /* Buffer that is used to construct the string. */          int buffer_size = (exponent > 0) ? exponent + frac_digits + 2 : frac_digits + 3;          if (is_negative)          {            buffer_size++;          }//.........这里部分代码省略.........

/** * The Number.prototype object's 'toString' routine * * See also: *          ECMA-262 v5, 15.7.4.2 * * @return ecma value *         Returned value must be freed with ecma_free_value. */static ecma_value_tecma_builtin_number_prototype_object_to_string (ecma_value_t this_arg, /**< this argument */                                                const ecma_value_t *arguments_list_p, /**< arguments list */                                                ecma_length_t arguments_list_len) /**< number of arguments */{  ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);  ECMA_TRY_CATCH (this_value, ecma_builtin_number_prototype_object_value_of (this_arg), ret_value);  ecma_number_t this_arg_number = ecma_get_number_from_value (this_value);  if (arguments_list_len == 0      || ecma_number_is_nan (this_arg_number)      || ecma_number_is_infinity (this_arg_number)      || ecma_number_is_zero (this_arg_number)      || (arguments_list_len > 0 && ecma_is_value_undefined (arguments_list_p[0])))  {    ecma_string_t *ret_str_p = ecma_new_ecma_string_from_number (this_arg_number);    ret_value = ecma_make_string_value (ret_str_p);  }  else  {    static const lit_utf8_byte_t digit_chars[36] =    {      '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',      'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',      'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',      'u', 'v', 'w', 'x', 'y', 'z'    };    ECMA_OP_TO_NUMBER_TRY_CATCH (arg_num, arguments_list_p[0], ret_value);    uint32_t radix = ecma_number_to_uint32 (arg_num);    if (radix < 2 || radix > 36)    {      ret_value = ecma_raise_range_error (ECMA_ERR_MSG (""));    }    else if (radix == 10)    {      ecma_string_t *ret_str_p = ecma_new_ecma_string_from_number (this_arg_number);      ret_value = ecma_make_string_value (ret_str_p);    }    else    {      bool is_negative = false;      if (ecma_number_is_negative (this_arg_number))      {        this_arg_number = -this_arg_number;        is_negative = true;      }      lit_utf8_byte_t digits[ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER];      int32_t exponent;      lit_utf8_size_t num_digits = ecma_number_to_decimal (this_arg_number, digits, &exponent);      exponent = exponent - (int32_t) num_digits;      /* Calculate the scale of the number in the specified radix. */      int scale = (int) -floor ((log (10) / log (radix)) * exponent);      bool is_scale_negative = false;      if (scale < 0)      {        is_scale_negative = true;        scale = -scale;      }      int buff_size;      if (is_scale_negative)      {        buff_size = (int) floor (log (this_arg_number) / log (radix)) + 1;      }      else      {        buff_size = scale + ECMA_NUMBER_FRACTION_WIDTH + 2;      }      if (is_negative)      {        buff_size++;      }      /* Normalize the number, so that it is as close to 0 exponent as possible. */      if (is_scale_negative)      {        for (int i = 0; i < scale; i++)        {          this_arg_number /= (ecma_number_t) radix;        }//.........这里部分代码省略.........