/* | |
* FreeRTOS Kernel V10.3.0 | |
* 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; | |
} | |