2 * FreeRTOS Kernel V10.2.0
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3 * Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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6 * this software and associated documentation files (the "Software"), to deal in
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7 * the Software without restriction, including without limitation the rights to
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8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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9 * the Software, and to permit persons to whom the Software is furnished to do so,
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10 * subject to the following conditions:
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12 * The above copyright notice and this permission notice shall be included in all
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13 * copies or substantial portions of the Software.
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 * http://www.FreeRTOS.org
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23 * http://aws.amazon.com/freertos
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25 * 1 tab == 4 spaces!
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30 * The library functions not provided by libgcc for freestanding environments.
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31 * The implementation of the functions in this file have made NO attempt
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32 * whatsoever to be optimised!
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35 #warning The functions in this file are very basic, and not optimised.
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39 /*-----------------------------------------------------------*/
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41 void *memcpy( void *pvDest, const void *pvSource, size_t xBytes )
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43 /* The compiler used during development seems to err unless these volatiles are
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44 included at -O3 optimisation. */
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45 volatile unsigned char *pcDest = ( volatile unsigned char * ) pvDest, *pcSource = ( volatile unsigned char * ) pvSource;
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48 /* Extremely crude standard library implementations in lieu of having a C
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50 if( pvDest != pvSource )
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52 for( x = 0; x < xBytes; x++ )
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54 pcDest[ x ] = pcSource[ x ];
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60 /*-----------------------------------------------------------*/
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62 void *memset( void *pvDest, int iValue, size_t xBytes )
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64 /* The compiler used during development seems to err unless these volatiles are
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65 included at -O3 optimisation. */
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66 volatile unsigned char * volatile pcDest = ( volatile unsigned char * volatile ) pvDest;
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69 /* Extremely crude standard library implementations in lieu of having a C
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71 for( x = 0; x < xBytes; x++ )
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73 pcDest[ x ] = ( unsigned char ) iValue;
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78 /*-----------------------------------------------------------*/
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80 int memcmp( const void *pvMem1, const void *pvMem2, unsigned long ulBytes )
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82 const volatile unsigned char *pucMem1 = pvMem1, *pucMem2 = pvMem2;
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83 register unsigned long x;
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85 /* Extremely crude standard library implementations in lieu of having a C
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87 for( x = 0; x < ulBytes; x++ )
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89 if( pucMem1[ x ] != pucMem2[ x ] )
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97 /*-----------------------------------------------------------*/
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99 int strcmp( const char *pcString1, const char *pcString2 )
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101 volatile int iReturn, iIndex = 0;
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103 /* Extremely crude standard library implementations in lieu of having a C
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106 while( ( pcString1[ iIndex ] != 0x00 ) && ( pcString2[ iIndex ] != 0x00 ) )
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111 if( ( pcString1[ iIndex ] == 0x00 ) && ( pcString2[ iIndex ] == 0x00 ) )
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