mirror of
https://github.com/eclipse-threadx/filex.git
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87 lines
4.6 KiB
C
87 lines
4.6 KiB
C
/***************************************************************************
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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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/** FileX 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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#define FX_SOURCE_CODE
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/* Include necessary system files. */
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#include "fx_api.h"
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#include "fx_system.h"
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#include "fx_utility.h"
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _fx_utility_32_unsigned_read PORTABLE C */
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/* 6.1 */
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/* AUTHOR */
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/* */
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/* William E. Lamie, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This function reads (with endian awareness) a 32-bit unsigned data */
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/* from the specified source and returns the value to the caller. */
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/* */
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/* INPUT */
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/* */
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/* source_ptr Source memory pointer */
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/* */
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/* OUTPUT */
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/* */
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/* ULONG value */
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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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/* FileX System Functions */
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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 William E. Lamie Initial Version 6.0 */
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/* 09-30-2020 William E. Lamie Modified comment(s), */
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/* resulting in version 6.1 */
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/* */
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/**************************************************************************/
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ULONG _fx_utility_32_unsigned_read(UCHAR *source_ptr)
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{
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ULONG value;
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/* Pickup the UINT from the destination with endian-awareness. */
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value = ((((ULONG) *(source_ptr+3)) & 0xFF) << 24) |
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((((ULONG) *(source_ptr+2)) & 0xFF) << 16) |
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((((ULONG) *(source_ptr+1)) & 0xFF) << 8) |
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(((ULONG) *(source_ptr)) & 0xFF);
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/* Return value to caller. */
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return(value);
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}
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