text: /* Contributer: kirto 沧御 */
  
  
  /* Hello World Example
  
     This example code is in the Public Domain (or CC0 licensed, at your option.)
  
     Unless required by applicable law or agreed to in writing, this
     software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
     CONDITIONS OF ANY KIND, either express or implied.
  */
  #include <stdio.h>
  #include "freertos/FreeRTOS.h"
  #include "freertos/task.h"
  #include "esp_system.h"
  #include "pikaScript.h"
  
  #define RX_Buff_SIZE 256
  char rxBuff[RX_Buff_SIZE] = { 0 };
  
  void clearBuff(char *buff, uint32_t size) {
      for (int i = 0; i < size; i++) {
          buff[i] = 0;
      }
  }
  
  char pika_getchar(){
      char chBuff[2] = {0};
      while(1){
          fgets(chBuff, 2, stdin);
          if(chBuff[0]!= 0){
              return chBuff[0];
          }
          vTaskDelay(pdMS_TO_TICKS(10));
      }
  }
  
  void app_main(void)
  {
      printf("------------------------------------------------------------------\r\n");
      printf("|                                                                |\r\n");
      printf("|     ____   _   __            _____              _          __  |\r\n");
      printf("|    / __ \\ (_) / /__ ____ _  / ___/ _____ _____ (_) ____   / /_ |\r\n");
      printf("|   / /_/ // / / //_// __ `/  \\__ \\ / ___// ___// / / __ \\ / __/ |\r\n");
      printf("|  / ____// / / ,<  / /_/ /  ___/ // /__ / /   / / / /_/ // /_   |\r\n");
      printf("| /_/    /_/ /_/|_| \\__,_/  /____/ \\___//_/   /_/ / .___/ \\__/   |\r\n");
      printf("|                                                /_/             |\r\n");
      printf("|          PikaScript - An Ultra Lightweight Python Engine       |\r\n");
      printf("|                                                                |\r\n");
      printf("|           [ https://github.com/pikastech/pikascript ]          |\r\n");
      printf("|           [  https://gitee.com/lyon1998/pikascript  ]          |\r\n");
      printf("|                                                                |\r\n");
      printf("------------------------------------------------------------------\r\n");
      PikaObj *pikaMain = pikaScriptInit();
      printf(">>> ");
      while (1)
      {
          char inputChar = pika_getchar();
          printf("%c", inputChar);
          if (inputChar == '\b'){
              uint32_t size = strGetSize(rxBuff);
              if(size == 0){
                  printf(" ");
                  continue;
              }
              printf(" \b");
              rxBuff[size - 1] = 0;
              continue;
          }
          if (inputChar != '\r' && inputChar != '\n') {
              strAppendWithSize(rxBuff, &inputChar, 1);
              continue;
          }
          if ( (inputChar == '\r') || (inputChar == '\n') ) {
              printf("\r\n");
              if(strEqu("exit()", rxBuff)){
                  /* exit pika shell */
                  return;
              }
              obj_run(pikaMain, rxBuff);
              printf(">>> ");
              clearBuff(rxBuff, RX_Buff_SIZE);
              continue;
          }
      }
  }
  