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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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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_descriptor_pack PORTABLE C */ |
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/* 6.3.0 */ |
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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 will pack an application structure into a USB */ |
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/* descriptor. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* descriptor Pointer to the unpacked */ |
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/* descriptor */ |
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/* descriptor_structure Components of the descriptor */ |
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/* descriptor_entries Number of entries in the */ |
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/* descriptor */ |
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/* raw_descriptor Pointer to packed descriptor */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _ux_utility_long_put Put 32-bit value */ |
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/* _ux_utility_short_put Put 16-bit value */ |
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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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/**************************************************************************/ |
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VOID _ux_utility_descriptor_pack(UCHAR * descriptor, UCHAR * descriptor_structure, |
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UINT descriptor_entries, UCHAR * raw_descriptor) |
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{ |
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/* Loop on all the entries in this descriptor. */ |
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✓✓ |
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while(descriptor_entries--) |
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{ |
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/* Get the length of that component. */ |
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✓✓✓ |
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switch(*descriptor_structure++) |
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{ |
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/* Check the size then build the component from the source and |
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insert it into the target descriptor. */ |
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case 4: |
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/* Increase address so it's aligned. */ |
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✓✓ |
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while((ALIGN_TYPE)descriptor & 3u) |
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descriptor++; |
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/* Put the DW. */ |
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_ux_utility_long_put(raw_descriptor, *((ULONG *) descriptor)); |
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raw_descriptor += 4; |
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descriptor += 4; |
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break; |
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case 2: |
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/* Increase address so it's aligned. */ |
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✓✓ |
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while((ALIGN_TYPE)descriptor & 1u) |
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descriptor++; |
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/* Put the Word. */ |
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_ux_utility_short_put(raw_descriptor, (USHORT)*((USHORT *) descriptor)); |
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raw_descriptor += 2; |
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descriptor += 2; |
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break; |
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default: |
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/* Put the byte. */ |
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*raw_descriptor = (UCHAR) *((UCHAR *) descriptor); |
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raw_descriptor++; |
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descriptor++; |
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} |
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} |
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/* Return to caller. */ |
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return; |
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} |