text: /*
   * FreeRTOS V202111.00
   * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of
   * this software and associated documentation files (the "Software"), to deal in
   * the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
   * the Software, and to permit persons to whom the Software is furnished to do so,
   * subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
   * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
   * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   * http://www.FreeRTOS.org
   * http://aws.amazon.com/freertos
   *
   * 1 tab == 4 spaces!
   */
  
  
  /*
   * The library functions not provided by libgcc for freestanding environments.
   * The implementation of the functions in this file have made NO attempt
   * whatsoever to be optimised!
   */
  
  #warning The functions in this file are very basic, and not optimised.
  
  #include <stddef.h>
  
  /*-----------------------------------------------------------*/
  
  void *memcpy( void *pvDest, const void *pvSource, size_t xBytes )
  {
  /* The compiler used during development seems to err unless these volatiles are
  included at -O3 optimisation.  */
  volatile unsigned char *pcDest = ( volatile unsigned char * ) pvDest, *pcSource = ( volatile unsigned char * ) pvSource;
  size_t x;
  
  	/* Extremely crude standard library implementations in lieu of having a C
  	library. */
  	if( pvDest != pvSource )
  	{
  		for( x = 0; x < xBytes; x++ )
  		{
  			pcDest[ x ] = pcSource[ x ];
  		}
  	}
  
  	return pvDest;
  }
  /*-----------------------------------------------------------*/
  
  void *memset( void *pvDest, int iValue, size_t xBytes )
  {
  /* The compiler used during development seems to err unless these volatiles are
  included at -O3 optimisation.  */
  volatile unsigned char * volatile pcDest = ( volatile unsigned char * volatile ) pvDest;
  volatile size_t x;
  
  	/* Extremely crude standard library implementations in lieu of having a C
  	library. */
  	for( x = 0; x < xBytes; x++ )
  	{
  		pcDest[ x ] = ( unsigned char ) iValue;
  	}
  
  	return pvDest;
  }
  /*-----------------------------------------------------------*/
  
  int memcmp( const void *pvMem1, const void *pvMem2, unsigned long ulBytes )
  {
  const volatile unsigned char *pucMem1 = pvMem1, *pucMem2 = pvMem2;
  register unsigned long x;
  
  	/* Extremely crude standard library implementations in lieu of having a C
  	library. */
      for( x = 0; x < ulBytes; x++ )
      {
          if( pucMem1[ x ] != pucMem2[ x ] )
          {
              break;
          }
      }
  
      return ulBytes - x;
  }
  /*-----------------------------------------------------------*/
  
  int strcmp( const char *pcString1, const char *pcString2 )
  {
  volatile int iReturn, iIndex = 0;
  
  	/* Extremely crude standard library implementations in lieu of having a C
  	library. */
  
  	while( ( pcString1[ iIndex ] != 0x00 ) && ( pcString2[ iIndex ] != 0x00 ) )
  	{
  		iIndex++;
  	}
  
  	if( ( pcString1[ iIndex ] == 0x00 ) && ( pcString2[ iIndex ] == 0x00 ) )
  	{
  		iReturn = 0;
  	}
  	else
  	{
  		iReturn = ~0;
  	}
  
  	return iReturn;
  }
  
  
  