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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** FileX Component */
/** */
/** Directory */
/** */
/**************************************************************************/
/**************************************************************************/
#define FX_SOURCE_CODE
/* Include necessary system files. */
#include "fx_api.h"
#include "fx_directory.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _fx_directory_short_name_get_extended PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function gets the short file name via the supplied long file */
/* name. If the long file name is really a short file name, the short */
/* file name will be returned. */
/* */
/* INPUT */
/* */
/* media_ptr Media control block pointer */
/* long_file_name Pointer to long (max 255) name*/
/* short_file_name Pointer to short (8.3) name */
/* short_file_name_length Buffer length for short name */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* _fx_directory_search Search for the file name in */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 William E. Lamie Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _fx_directory_short_name_get_extended(FX_MEDIA *media_ptr, CHAR *long_file_name, CHAR *short_file_name, UINT short_file_name_length)
{
UINT status;
UINT i;
FX_DIR_ENTRY dir_entry;
/* Setup pointer to media name buffer. */
dir_entry.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN;
/* Clear the short name string. */
dir_entry.fx_dir_entry_short_name[0] = 0;
/* If trace is enabled, insert this event into the trace buffer. */
FX_TRACE_IN_LINE_INSERT(FX_TRACE_DIRECTORY_SHORT_NAME_GET, media_ptr, long_file_name, short_file_name, 0, FX_TRACE_DIRECTORY_EVENTS, 0, 0)
/* Protect against other threads accessing the media. */
FX_PROTECT
/* Search the system for the supplied short directory name. */
status = _fx_directory_search(media_ptr, long_file_name, &dir_entry, FX_NULL, FX_NULL);
/* Determine if the search was successful. */
if (status != FX_SUCCESS)
{
/* Release media protection. */
FX_UNPROTECT
/* Return the error code. */
return(status);
}
/* Determine if there is a short name. */
if (dir_entry.fx_dir_entry_short_name[0])
{
/* Yes, there is a short name. Copy the short file name portion into the destination string. */
i = 0;
while ((i < (FX_MAX_SHORT_NAME_LEN - 1)) && (dir_entry.fx_dir_entry_short_name[i]) && (i < (short_file_name_length - 1)))
{
/* Copy a character of the long file name into the destination name. */
short_file_name[i] = dir_entry.fx_dir_entry_short_name[i];
/* Move to next character. */
i++;
}
/* Ensure the short file name is NULL terminated. */
short_file_name[i] = FX_NULL;
/* Check if the buffer is too short for the name. */
if ((i == (short_file_name_length - 1)) && (dir_entry.fx_dir_entry_short_name[i]))
{
/* Buffer too short, return error. */
status = FX_BUFFER_ERROR;
}
}
else
{
/* There is no long file name, simply copy the long file name into the short file name destination. */
i = 0;
while ((i < (FX_MAX_SHORT_NAME_LEN - 1)) && (dir_entry.fx_dir_entry_name[i]) && (i < (short_file_name_length - 1)))
{
/* Copy a character of the file name into the destination name. */
short_file_name[i] = dir_entry.fx_dir_entry_name[i];
/* Move to next character. */
i++;
}
/* Ensure the short file name is NULL terminated. */
short_file_name[i] = FX_NULL;
/* Check if the buffer is too short for the name. */
if ((i == (short_file_name_length - 1)) && (dir_entry.fx_dir_entry_name[i]))
{
/* Buffer too short, return error. */
status = FX_BUFFER_ERROR;
}
}
/* Release media protection. */
FX_UNPROTECT
/* Return the completion status. */
return(status);
}