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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** USBX Component */ |
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/** */ |
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/** Utility */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/* Include necessary system files. */ |
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#define UX_SOURCE_CODE |
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#include "ux_api.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _ux_utility_memory_compare PORTABLE C */ |
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/* 6.1 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function compares two memory blocks. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* memory_source Pointer to source */ |
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/* memory_destination Pointer to destination */ |
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/* length Number of bytes to compare */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* UX_SUCCESS If blocks are equal */ |
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/* UX_ERROR If blocks are not equal */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* USBX Components */ |
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/* */ |
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/* RELEASE HISTORY */ |
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/* */ |
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/* DATE NAME DESCRIPTION */ |
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/* */ |
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/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ |
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/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ |
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/* resulting in version 6.1 */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_utility_memory_compare(VOID *memory_source, VOID *memory_destination, ULONG length) |
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{ |
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UCHAR * source; |
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UCHAR * destination; |
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/* Setup source and destination byte oriented pointers. */ |
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source = (UCHAR *) memory_source; |
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destination = (UCHAR *) memory_destination; |
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/* Loop to compare blocks. */ |
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✓✓ |
430182 |
while(length--) |
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{ |
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/* Compare a single byte. */ |
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✓✓ |
414194 |
if(*destination++ != *source++) |
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{ |
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/* Not equal, return an error. */ |
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return(UX_ERROR); |
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} |
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} |
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/* Blocks are equal, return success. */ |
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return(UX_SUCCESS); |
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} |
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