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 <stdarg.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "jerryscript-port.h"
  #include "jerryscript-port-default.h"
  #include "jerryscript-debugger.h"
  
  /**
   * Actual log level
   */
  static jerry_log_level_t jerry_port_default_log_level = JERRY_LOG_LEVEL_ERROR;
  
  /**
   * Get the log level
   *
   * @return current log level
   */
  jerry_log_level_t
  jerry_port_default_get_log_level (void)
  {
    return jerry_port_default_log_level;
  } /* jerry_port_default_get_log_level */
  
  /**
   * Set the log level
   */
  void
  jerry_port_default_set_log_level (jerry_log_level_t level) /**< log level */
  {
    jerry_port_default_log_level = level;
  } /* jerry_port_default_set_log_level */
  
  /**
   * Default implementation of jerry_port_log. Prints log message to the standard
   * error with 'vfprintf' if message log level is less than or equal to the
   * current log level.
   *
   * If debugger support is enabled, printing happens first to an in-memory buffer,
   * which is then sent both to the standard error and to the debugger client.
   */
  void
  jerry_port_log (jerry_log_level_t level, /**< message log level */
                  const char *format, /**< format string */
                  ...)  /**< parameters */
  {
    if (level <= jerry_port_default_log_level)
    {
      va_list args;
      va_start (args, format);
  #if defined (JERRY_DEBUGGER) && (JERRY_DEBUGGER == 1)
      int length = vsnprintf (NULL, 0, format, args);
      va_end (args);
      va_start (args, format);
  
      JERRY_VLA (char, buffer, length + 1);
      vsnprintf (buffer, (size_t) length + 1, format, args);
  
      fprintf (stderr, "%s", buffer);
      jerry_debugger_send_log (level, (jerry_char_t *) buffer, (jerry_size_t) length);
  #else /* If jerry-debugger isn't defined, libc is turned on */
      vfprintf (stderr, format, args);
  #endif /* defined (JERRY_DEBUGGER) && (JERRY_DEBUGGER == 1) */
      va_end (args);
    }
  } /* jerry_port_log */
  
  #if defined (JERRY_DEBUGGER) && (JERRY_DEBUGGER == 1)
  
  #define DEBUG_BUFFER_SIZE (256)
  static char debug_buffer[DEBUG_BUFFER_SIZE];
  static int debug_buffer_index = 0;
  
  #endif /* defined (JERRY_DEBUGGER) && (JERRY_DEBUGGER == 1) */
  
  /**
   * Default implementation of jerry_port_print_char. Uses 'putchar' to
   * print a single character to standard output.
   */
  void
  jerry_port_print_char (char c) /**< the character to print */
  {
    putchar (c);
  
  #if defined (JERRY_DEBUGGER) && (JERRY_DEBUGGER == 1)
    debug_buffer[debug_buffer_index++] = c;
  
    if ((debug_buffer_index == DEBUG_BUFFER_SIZE) || (c == '\n'))
    {
      jerry_debugger_send_output ((jerry_char_t *) debug_buffer, (jerry_size_t) debug_buffer_index);
      debug_buffer_index = 0;
    }
  #endif /* defined (JERRY_DEBUGGER) && (JERRY_DEBUGGER == 1) */
  } /* jerry_port_print_char */
  