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 <string.h>
  #include <stdlib.h>
  #include <tinyara/fs/fs_utils.h>
  
  #include "jerryscript.h"
  #include "jerryscript-ext/handler.h"
  #include "jerryscript-port.h"
  #include "setjmp.h"
  
  #include <apps/shell/tash.h> // To register tash command
  
  /**
   * Maximum command line arguments number.
   */
  #define JERRY_MAX_COMMAND_LINE_ARGS (16)
  
  /**
   * Standalone Jerry exit codes.
   */
  #define JERRY_STANDALONE_EXIT_CODE_OK   (0)
  #define JERRY_STANDALONE_EXIT_CODE_FAIL (1)
  
  /**
   * Context size of the SYNTAX_ERROR
   */
  #define SYNTAX_ERROR_CONTEXT_SIZE 2
  
  /**
   * Print usage and available options
   */
  static void
  print_help (char *name)
  {
    printf ("Usage: %s [OPTION]... [FILE]...\n"
            "\n"
            "Options:\n"
            "  --log-level [0-3]\n"
            "  --mem-stats\n"
            "  --mem-stats-separate\n"
            "  --show-opcodes\n"
            "  --start-debug-server\n"
            "\n",
            name);
  } /* print_help */
  
  /**
   * Read source code into buffer.
   *
   * Returned value must be freed if it's not NULL.
   * @return NULL, if read or allocation has failed
   *         pointer to the allocated memory block, otherwise
   */
  static const uint8_t *
  read_file (const char *file_name, /**< source code */
             size_t *out_size_p) /**< [out] number of bytes successfully read from source */
  {
    FILE *file = fopen (get_fullpath(file_name), "r");
    if (file == NULL)
    {
      jerry_port_log (JERRY_LOG_LEVEL_ERROR, "Error: cannot open file: %s\n", file_name);
      return NULL;
    }
  
    int fseek_status = fseek (file, 0, SEEK_END);
    if (fseek_status != 0)
    {
      jerry_port_log (JERRY_LOG_LEVEL_ERROR, "Failed to seek (error: %d)\n", fseek_status);
      fclose (file);
      return NULL;
    }
  
    long script_len = ftell (file);
    if (script_len < 0)
    {
      jerry_port_log (JERRY_LOG_LEVEL_ERROR, "Failed to get the file size(error %ld)\n", script_len);
      fclose (file);
      return NULL;
    }
  
    rewind (file);
  
    uint8_t *buffer = (uint8_t *) malloc (script_len);
  
    if (buffer == NULL)
    {
      jerry_port_log (JERRY_LOG_LEVEL_ERROR, "Out of memory error\n");
      fclose (file);
      return NULL;
    }
  
    size_t bytes_read = fread (buffer, 1u, script_len, file);
  
    if (!bytes_read || bytes_read != script_len)
    {
      jerry_port_log (JERRY_LOG_LEVEL_ERROR, "Error: failed to read file: %s\n", file_name);
      free ((void*) buffer);
  
      fclose (file);
      return NULL;
    }
  
    fclose (file);
  
    *out_size_p = bytes_read;
    return (const uint8_t *) buffer;
  } /* read_file */
  
  /**
   * Print error value
   */
  static void
  print_unhandled_exception (jerry_value_t error_value, /**< error value */
                             const jerry_char_t *source_p) /**< source_p */
  {
    assert (jerry_value_is_error (error_value));
  
    error_value = jerry_get_value_without_error_flag (error_value);
    jerry_value_t err_str_val = jerry_value_to_string (error_value);
    jerry_size_t err_str_size = jerry_get_string_size (err_str_val);
    jerry_char_t err_str_buf[256];
  
    jerry_release_value (error_value);
  
    if (err_str_size >= 256)
    {
      const char msg[] = "[Error message too long]";
      err_str_size = sizeof (msg) / sizeof (char) - 1;
      memcpy (err_str_buf, msg, err_str_size);
    }
    else
    {
      jerry_size_t sz = jerry_string_to_char_buffer (err_str_val, err_str_buf, err_str_size);
      assert (sz == err_str_size);
      err_str_buf[err_str_size] = 0;
  
      if (jerry_is_feature_enabled (JERRY_FEATURE_ERROR_MESSAGES)
          && jerry_get_error_type (error_value) == JERRY_ERROR_SYNTAX)
      {
        unsigned int err_line = 0;
        unsigned int err_col = 0;
  
        /* 1. parse column and line information */
        for (jerry_size_t i = 0; i < sz; i++)
        {
          if (!strncmp ((char *) (err_str_buf + i), "[line: ", 7))
          {
            i += 7;
  
            char num_str[8];
            unsigned int j = 0;
  
            while (i < sz && err_str_buf[i] != ',')
            {
              num_str[j] = (char) err_str_buf[i];
              j++;
              i++;
            }
            num_str[j] = '\0';
  
            err_line = (unsigned int) strtol (num_str, NULL, 10);
  
            if (strncmp ((char *) (err_str_buf + i), ", column: ", 10))
            {
              break; /* wrong position info format */
            }
  
            i += 10;
            j = 0;
  
            while (i < sz && err_str_buf[i] != ']')
            {
              num_str[j] = (char) err_str_buf[i];
              j++;
              i++;
            }
            num_str[j] = '\0';
  
            err_col = (unsigned int) strtol (num_str, NULL, 10);
            break;
          }
        } /* for */
  
        if (err_line != 0 && err_col != 0)
        {
          unsigned int curr_line = 1;
  
          bool is_printing_context = false;
          unsigned int pos = 0;
  
          /* 2. seek and print */
          while (source_p[pos] != '\0')
          {
            if (source_p[pos] == '\n')
            {
              curr_line++;
            }
  
            if (err_line < SYNTAX_ERROR_CONTEXT_SIZE
                || (err_line >= curr_line
                    && (err_line - curr_line) <= SYNTAX_ERROR_CONTEXT_SIZE))
            {
              /* context must be printed */
              is_printing_context = true;
            }
  
            if (curr_line > err_line)
            {
              break;
            }
  
            if (is_printing_context)
            {
              jerry_port_log (JERRY_LOG_LEVEL_ERROR, "%c", source_p[pos]);
            }
  
            pos++;
          }
  
          jerry_port_log (JERRY_LOG_LEVEL_ERROR, "\n");
  
          while (--err_col)
          {
            jerry_port_log (JERRY_LOG_LEVEL_ERROR, "~");
          }
  
          jerry_port_log (JERRY_LOG_LEVEL_ERROR, "^\n");
        }
      }
    }
  
    jerry_port_log (JERRY_LOG_LEVEL_ERROR, "Script Error: %s\n", err_str_buf);
    jerry_release_value (err_str_val);
  } /* print_unhandled_exception */
  
  /**
   * Register a JavaScript function in the global object.
   */
  static void
  register_js_function (const char *name_p, /**< name of the function */
                        jerry_external_handler_t handler_p) /**< function callback */
  {
    jerry_value_t result_val = jerryx_handler_register_global ((const jerry_char_t *) name_p, handler_p);
  
    if (jerry_value_is_error (result_val))
    {
      jerry_port_log (JERRY_LOG_LEVEL_WARNING, "Warning: failed to register '%s' method.", name_p);
    }
  
    jerry_release_value (result_val);
  } /* register_js_function */
  
  /**
   * JerryScript log level
   */
  static jerry_log_level_t jerry_log_level = JERRY_LOG_LEVEL_ERROR;
  
  
  /**
   * JerryScript command main
   */
  static int
  jerry_cmd_main (int argc, char *argv[])
  {
  
    if (argc > JERRY_MAX_COMMAND_LINE_ARGS)
    {
      jerry_port_log (JERRY_LOG_LEVEL_ERROR,
                      "Too many command line arguments. Current maximum is %d\n",
                      JERRY_MAX_COMMAND_LINE_ARGS);
  
      return JERRY_STANDALONE_EXIT_CODE_FAIL;
    }
  
    const char *file_names[JERRY_MAX_COMMAND_LINE_ARGS];
    int i;
    int files_counter = 0;
    bool start_debug_server = false;
    uint16_t debug_port = 5001;
  
    jerry_init_flag_t flags = JERRY_INIT_EMPTY;
  
    for (i = 1; i < argc; i++)
    {
      if (!strcmp ("-h", argv[i]) || !strcmp ("--help", argv[i]))
      {
        print_help (argv[0]);
        return JERRY_STANDALONE_EXIT_CODE_OK;
      }
      else if (!strcmp ("--mem-stats", argv[i]))
      {
        jerry_log_level = JERRY_LOG_LEVEL_DEBUG;
        flags |= JERRY_INIT_MEM_STATS;
      }
      else if (!strcmp ("--mem-stats-separate", argv[i]))
      {
        jerry_log_level = JERRY_LOG_LEVEL_DEBUG;
        flags |= JERRY_INIT_MEM_STATS_SEPARATE;
      }
      else if (!strcmp ("--show-opcodes", argv[i]))
      {
        jerry_log_level = JERRY_LOG_LEVEL_DEBUG;
        flags |= JERRY_INIT_SHOW_OPCODES | JERRY_INIT_SHOW_REGEXP_OPCODES;
      }
      else if (!strcmp ("--log-level", argv[i]))
      {
        if (++i < argc && strlen (argv[i]) == 1 && argv[i][0] >='0' && argv[i][0] <= '3')
        {
          jerry_log_level = argv[i][0] - '0';
        }
        else
        {
          jerry_port_log (JERRY_LOG_LEVEL_ERROR, "Error: wrong format or invalid argument\n");
          return JERRY_STANDALONE_EXIT_CODE_FAIL;
        }
      }
      else if (!strcmp ("--start-debug-server", argv[i]))
      {
        start_debug_server = true;
      }
      else if (!strcmp ("--debug-server-port", argv[i]))
      {
        if (++i < argc)
        {
          char *endptr;
          debug_port = (uint16_t) strtol (argv[i], &endptr, 10);
        }
        else
        {
          jerry_port_log (JERRY_LOG_LEVEL_ERROR, "Error: wrong format or invalid argument\n");
          return JERRY_STANDALONE_EXIT_CODE_FAIL;
        }
      }
      else
      {
        file_names[files_counter++] = argv[i];
      }
    }
  
    jerry_init (flags);
  
    if (start_debug_server)
    {
      jerry_debugger_init (debug_port);
    }
  
    register_js_function ("assert", jerryx_handler_assert);
    register_js_function ("gc", jerryx_handler_gc);
    register_js_function ("print", jerryx_handler_print);
  
    jerry_value_t ret_value = jerry_create_undefined ();
  
    if (files_counter == 0)
    {
      printf ("No input files, running a hello world demo:\n");
      const jerry_char_t script[] = "var str = 'Hello World'; print(str + ' from JerryScript')";
      size_t script_size = strlen ((const char *) script);
  
      ret_value = jerry_parse (NULL, 0, script, script_size, JERRY_PARSE_NO_OPTS);
  
      if (!jerry_value_is_error (ret_value))
      {
        ret_value = jerry_run (ret_value);
      }
    }
    else
    {
      for (i = 0; i < files_counter; i++)
      {
        size_t source_size;
        const jerry_char_t *source_p = read_file (file_names[i], &source_size);
  
        if (source_p == NULL)
        {
          jerry_port_log (JERRY_LOG_LEVEL_ERROR, "Source file load error\n");
          return JERRY_STANDALONE_EXIT_CODE_FAIL;
        }
  
        ret_value = jerry_parse ((jerry_char_t *) file_names[i],
                                 strlen (file_names[i]),
                                 source_p,
                                 source_size,
                                 JERRY_PARSE_NO_OPTS);
  
        if (!jerry_value_is_error (ret_value))
        {
          jerry_value_t func_val = ret_value;
          ret_value = jerry_run (func_val);
          jerry_release_value (func_val);
        }
  
        if (jerry_value_is_error (ret_value))
        {
          print_unhandled_exception (ret_value, source_p);
          free ((void*) source_p);
  
          break;
        }
  
        free ((void*) source_p);
  
        jerry_release_value (ret_value);
        ret_value = jerry_create_undefined ();
      }
    }
  
    int ret_code = JERRY_STANDALONE_EXIT_CODE_OK;
  
    if (jerry_value_is_error (ret_value))
    {
      ret_code = JERRY_STANDALONE_EXIT_CODE_FAIL;
    }
  
    jerry_release_value (ret_value);
    jerry_cleanup ();
  
    return ret_code;
  } /* jerry_cmd_main */
  
  /**
   * Run JerryScript and print its return value.
   */
  static int
  jerry(int argc, char *argv[])
  {
    int ret_code = jerry_cmd_main(argc, argv);
  
  #ifdef CONFIG_DEBUG_VERBOSE
    jerry_port_log(JERRY_LOG_LEVEL_DEBUG, "JerryScript result: %d\n", ret_code);
  #endif
  
    return ret_code;
  } /* jerry */
  
  /**
   * Aborts the program.
   */
  void jerry_port_fatal (jerry_fatal_code_t code)
  {
    exit (1);
  } /* jerry_port_fatal */
  
  /**
   * Provide log message implementation for the engine.
   */
  void
  jerry_port_log (jerry_log_level_t level, /**< log level */
                  const char *format, /**< format string */
                  ...)  /**< parameters */
  {
    if (level <= jerry_log_level)
    {
      va_list args;
      va_start (args, format);
      vfprintf (stderr, format, args);
      va_end (args);
    }
  } /* jerry_port_log */
  
  /**
   * Dummy function to get the time zone.
   *
   * @return true
   */
  bool
  jerry_port_get_time_zone (jerry_time_zone_t *tz_p)
  {
    /* We live in UTC. */
    tz_p->offset = 0;
    tz_p->daylight_saving_time = 0;
  
    return true;
  } /* jerry_port_get_time_zone */
  
  /**
   * Dummy function to get the current time.
   *
   * @return 0
   */
  double
  jerry_port_get_current_time (void)
  {
    return 0;
  } /* jerry_port_get_current_time */
  
  /**
   * Provide the implementation of jerryx_port_handler_print_char.
   * Uses 'printf' to print a single character to standard output.
   */
  void
  jerryx_port_handler_print_char (char c) /**< the character to print */
  {
    printf ("%c", c);
  } /* jerryx_port_handler_print_char */
  
  /**
  * Main program.
  *
  * @return 0 if success, error code otherwise
  */
  #ifdef CONFIG_BUILD_KERNEL
  int main (int argc, FAR char *argv[])
  #else
  int jerry_main (int argc, char *argv[])
  #endif
  {
    tash_cmd_install("jerry", jerry, TASH_EXECMD_SYNC);
    return 0;
  } /* main */
  