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https://github.com/jerryscript-project/jerryscript.git
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Instead of a fixed number of arguments, a call info structure is passed to the handlers, which can be extended in the future without breaknig the API. This structure holds new.target value, so its getter function is removed. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "jerryscript-ext/handler.h"
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#include "jerryscript-port.h"
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#include "jerryscript-debugger.h"
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/**
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* Provide a 'print' implementation for scripts.
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*
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* The routine converts all of its arguments to strings and outputs them
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* char-by-char using jerry_port_print_char.
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*
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* The NUL character is output as "\u0000", other characters are output
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* bytewise.
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*
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* Note:
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* This implementation does not use standard C `printf` to print its
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* output. This allows more flexibility but also extends the core
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* JerryScript engine port API. Applications that want to use
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* `jerryx_handler_print` must ensure that their port implementation also
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* provides `jerry_port_print_char`.
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*
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* @return undefined - if all arguments could be converted to strings,
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* error - otherwise.
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*/
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jerry_value_t
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jerryx_handler_print (const jerry_call_info_t *call_info_p, /**< call information */
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const jerry_value_t args_p[], /**< function arguments */
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const jerry_length_t args_cnt) /**< number of function arguments */
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{
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(void) call_info_p; /* unused */
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const char * const null_str = "\\u0000";
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jerry_value_t ret_val = jerry_create_undefined ();
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for (jerry_length_t arg_index = 0; arg_index < args_cnt; arg_index++)
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{
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jerry_value_t str_val;
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if (jerry_value_is_symbol (args_p[arg_index]))
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{
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str_val = jerry_get_symbol_descriptive_string (args_p[arg_index]);
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}
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else
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{
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str_val = jerry_value_to_string (args_p[arg_index]);
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}
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if (jerry_value_is_error (str_val))
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{
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/* There is no need to free the undefined value. */
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ret_val = str_val;
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break;
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}
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jerry_length_t length = jerry_get_utf8_string_length (str_val);
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jerry_length_t substr_pos = 0;
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jerry_char_t substr_buf[256];
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do
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{
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jerry_size_t substr_size = jerry_substring_to_utf8_char_buffer (str_val,
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substr_pos,
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length,
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substr_buf,
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256 - 1);
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jerry_char_t *buf_end_p = substr_buf + substr_size;
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/* Update start position by the number of utf-8 characters. */
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for (jerry_char_t *buf_p = substr_buf; buf_p < buf_end_p; buf_p++)
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{
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/* Skip intermediate utf-8 octets. */
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if ((*buf_p & 0xc0) != 0x80)
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{
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substr_pos++;
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}
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}
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if (substr_pos == length)
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{
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*buf_end_p++ = (arg_index < args_cnt - 1) ? ' ' : '\n';
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}
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for (jerry_char_t *buf_p = substr_buf; buf_p < buf_end_p; buf_p++)
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{
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char chr = (char) *buf_p;
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if (chr != '\0')
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{
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jerry_port_print_char (chr);
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continue;
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}
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for (jerry_size_t null_index = 0; null_str[null_index] != '\0'; null_index++)
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{
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jerry_port_print_char (null_str[null_index]);
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}
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}
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}
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while (substr_pos < length);
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jerry_release_value (str_val);
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}
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if (args_cnt == 0 || jerry_value_is_error (ret_val))
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{
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jerry_port_print_char ('\n');
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}
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return ret_val;
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} /* jerryx_handler_print */
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