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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_system.h"
#include "fx_directory.h"
#include "fx_file.h"
#include "fx_utility.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _fx_directory_information_get PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function first attempts to find the specified directory name. */
/* If found, the complete file parameters are placed in all non-NULL */
/* return parameters. If the file name is not found, the appropriate */
/* error code is returned to the caller. */
/* */
/* INPUT */
/* */
/* media_ptr Media control block pointer */
/* directory_name Directory name pointer */
/* attributes Pointer to attributes */
/* size Pointer to size */
/* year Pointer to year */
/* month Pointer to month */
/* day Pointer to day */
/* hour Pointer to hour */
/* minute Pointer to minute */
/* second Pointer to second */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* _fx_directory_search Search for the file name in */
/* the directory structure */
/* */
/* 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), verified */
/* memcpy usage, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _fx_directory_information_get(FX_MEDIA *media_ptr, CHAR *directory_name,
UINT *attributes, ULONG *size,
UINT *year, UINT *month, UINT *day,
UINT *hour, UINT *minute, UINT *second)
{
UINT status;
FX_DIR_ENTRY dir_entry;
ULONG open_count;
FX_FILE *search_ptr;
#ifndef FX_MEDIA_STATISTICS_DISABLE
/* Increment the number of times this service has been called. */
media_ptr -> fx_media_directory_information_gets++;
#endif
/* 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;
/* Check the media to make sure it is open. */
if (media_ptr -> fx_media_id != FX_MEDIA_ID)
{
/* Return the media not opened error. */
return(FX_MEDIA_NOT_OPEN);
}
/* If trace is enabled, insert this event into the trace buffer. */
FX_TRACE_IN_LINE_INSERT(FX_TRACE_DIRECTORY_INFORMATION_GET, media_ptr, directory_name, 0, 0, FX_TRACE_DIRECTORY_EVENTS, 0, 0)
/* Protect against other threads accessing the media. */
FX_PROTECT
/* Search the system for the supplied directory name. */
status = _fx_directory_search(media_ptr, directory_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);
}
/* Check the list of open files for others open for writing. */
open_count = media_ptr -> fx_media_opened_file_count;
search_ptr = media_ptr -> fx_media_opened_file_list;
while (open_count)
{
/* Look at each opened file to see if the same file is opened
for writing. */
if ((search_ptr -> fx_file_dir_entry.fx_dir_entry_log_sector == dir_entry.fx_dir_entry_log_sector) &&
(search_ptr -> fx_file_dir_entry.fx_dir_entry_byte_offset == dir_entry.fx_dir_entry_byte_offset) &&
(search_ptr -> fx_file_open_mode))
{
/* The file has been opened for writing by a previous call. Use the information used by
the writer instead of what is currently on the media. */
_fx_utility_memory_copy((UCHAR *)&search_ptr -> fx_file_dir_entry, (UCHAR *)&dir_entry, sizeof(FX_DIR_ENTRY)); /* Use case of memcpy is verified. */
break;
}
/* Adjust the pointer and decrement the search count. */
search_ptr = search_ptr -> fx_file_opened_next;
open_count--;
}
/* Check to see if attributes are required. */
if (attributes)
{
/* Pickup the attributes. */
*attributes = dir_entry.fx_dir_entry_attributes;
}
/* Check to see if the size is required. */
if (size)
{
/* Pickup the size. */
*size = (ULONG)dir_entry.fx_dir_entry_file_size;
}
/* Check to see if the year is required. */
if (year)
{
/* Pickup the year. */
*year = ((dir_entry.fx_dir_entry_date >> FX_YEAR_SHIFT) & FX_YEAR_MASK) +
FX_BASE_YEAR;
}
/* Check to see if the month is required. */
if (month)
{
/* Pickup the month. */
*month = (dir_entry.fx_dir_entry_date >> FX_MONTH_SHIFT) & FX_MONTH_MASK;
}
/* Check to see if the day is required. */
if (day)
{
/* Pickup the day. */
*day = dir_entry.fx_dir_entry_date & FX_DAY_MASK;
}
/* Check to see if the hour is required. */
if (hour)
{
/* Pickup the hour. */
*hour = (dir_entry.fx_dir_entry_time >> FX_HOUR_SHIFT) & FX_HOUR_MASK;
}
/* Check to see if the minute is required. */
if (minute)
{
/* Pickup the minute. */
*minute = (dir_entry.fx_dir_entry_time >> FX_MINUTE_SHIFT) & FX_MINUTE_MASK;
}
/* Check to see if the second is required. */
if (second)
{
/* Pickup the second. */
*second = (dir_entry.fx_dir_entry_time & FX_SECOND_MASK) * 2;
}
/* Release media protection. */
FX_UNPROTECT
/* Directory information get is complete, return successful status. */
return(FX_SUCCESS);
}