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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Pictbridge Application */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_pictbridge.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_pictbridge_array_element_to_array_hexa PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function translates an array of elements into an hexa array */
/* */
/* INPUT */
/* */
/* element Address of the element */
/* hexa_array address of array */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* */
/* CALLED BY */
/* */
/* _ux_pictbridge_object_parse */
/* */
/**************************************************************************/
UINT _ux_pictbridge_array_element_to_array_hexa(UCHAR *element, ULONG *hexa_array)
{
ULONG element_array_length;
ULONG local_hexa_value;
UCHAR element_content;
UCHAR element_hexa;
UCHAR *element_position;
ULONG remaining_length;
ULONG element_length;
ULONG saved_element_length = 0;
UINT string_length = UX_PICTBRIDGE_MAX_ELEMENT_SIZE;
UINT status;
ULONG *hexa_array_end = hexa_array + UX_PICTBRIDGE_MAX_DEVINFO_ARRAY_SIZE;
/* Get the string length. */
status = _ux_utility_string_length_check(element, &string_length, UX_PICTBRIDGE_MAX_ELEMENT_SIZE);
if (status != UX_SUCCESS)
return(status);
/* Get the element length. */
element_array_length = string_length + 1;
/* Parse the entire element array. */
while(element_array_length != 0)
{
/* Search for the space if delimiter or the terminating 0. */
element_position = element;
/* The length must be saved. */
remaining_length = element_array_length;
/* Parse this element. */
while(remaining_length !=0)
{
/* Check for delimiter. */
if (*element_position == UX_PICTBRIDGE_TAG_CHAR_SPACE || *element_position == 0)
{
/* We found an element. Mark its end. */
*element_position = 0;
/* Get the string length, max length 8 for 32-bit hex value. */
status = _ux_utility_string_length_check(element, &string_length, 8);
if (status != UX_SUCCESS)
return(status);
/* Get the element length. */
element_length = string_length;
/* Save it. */
saved_element_length = element_length + 1;
/* Reset the local hexa value. */
local_hexa_value = 0;
/* We parse the element and build the hexa value one byte at a type. */
while(element_length)
{
/* Shift the previous content by 1 nibble. */
local_hexa_value = (local_hexa_value << 4) & 0xFFFFFFFFu;
/* Get the element content. */
element_content = *element;
/* Check for the element content. Should be >0 <9 or 'A' to 'F'. */
if ((element_content >= '0' && element_content <= '9') ||
(element_content >= 'a' && element_content <= 'f') ||
(element_content >= 'A' && element_content <= 'F'))
{
/* We have a valid element content. Turn it into a hexa decimal value. */
if (element_content >= '0' && element_content <= '9')
/* We have a digit. */
element_hexa = (UCHAR)(element_content - '0');
else
{
/* We have a 'A' to 'F' or 'a' to 'f' value. */
if (element_content >= 'a' && element_content <= 'f')
/* We have a 'a' to 'f' char. */
element_hexa = (UCHAR)(element_content - 'a' + 10);
else
/* We have a 'A' to 'F' char. */
element_hexa = (UCHAR)(element_content - 'A' + 10);
}
}
else
{
/* Reset the last position in the array. */
*hexa_array = 0;
/* We have a syntax violation. */
return(UX_ERROR);
}
/* Add the found value to the current cumulated hexa value. */
local_hexa_value |= element_hexa;
/* Next position. */
element++;
/* Update length. */
element_length--;
}
/* We have finished building the 32 bit hexa value. Save it in the array. */
*hexa_array = local_hexa_value;
/* Next element in the array. */
hexa_array++;
/* We are done with this element. */
break;
}
else
/* Next element position. */
element_position++;
/* Adjust the remaining length. */
remaining_length--;
}
/* Check if the array is Full. */
if (hexa_array == hexa_array_end)
break;
/* Increment the element position to the next one if there. */
element++;
/* Adjust the length of the array. */
element_array_length -= saved_element_length;
}
/* Reset the remaining positions in the array. */
while(hexa_array != hexa_array_end)
{
*hexa_array = 0;
hexa_array++;
}
/* Operation was successful. */
return(UX_SUCCESS);
}
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