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ff_dir.c
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ff_dir.c
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/*
* FreeRTOS+FAT V2.3.3
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/**
* @file ff_dir.c
* @ingroup DIR
*
* @defgroup DIR Handles Directory Traversal
* @brief Handles DIR access and traversal.
*
* Provides FindFirst() and FindNext() Interfaces
**/
#include "ff_headers.h"
#include <stdio.h>
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
#include <wchar.h>
#endif
#if defined( WIN32 )
#define wcsicmp _wcsicmp
#else
#define wcsicmp wcscasecmp
#include <ctype.h>
#endif
/* Calculate a simple LFN checksum. */
static uint8_t FF_CreateChkSum( const uint8_t * pa_pShortName );
static BaseType_t FF_ShortNameExists( FF_IOManager_t * pxIOManager,
uint32_t ulDirCluster,
char * pcShortName,
FF_Error_t * pxError );
#if ( ffconfigSHORTNAME_CASE != 0 )
/* For short-name entries, NT/XP etc store case information in byte 0x0c
* Use this to show proper case of "README.txt" or "source.H".
*/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
static void FF_CaseShortName( FF_T_WCHAR * pcName,
uint8_t attrib );
#else
static void FF_CaseShortName( char * pcName,
uint8_t attrib );
#endif
#endif /* ffconfigSHORTNAME_CASE */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
/* For unicode, the short name can be expanded to wchar
* by inserting zero's.
*/
static void FF_ShortNameExpand( FF_T_WCHAR * );
#endif
/*
* Transform a name as stored on disk "README__TXT"
* to a nul-terminated string: "README.TXT", "FILE001".
* A dot is only added if an extension is present.
*/
static void FF_ProcessShortName( char * pcName );
#if ( ffconfigTIME_SUPPORT != 0 )
static void FF_PlaceTime( uint8_t * pucEntryBuffer,
uint32_t Offset,
FF_SystemTime_t * pxTime );
static void FF_PlaceDate( uint8_t * pucEntryBuffer,
uint32_t Offset,
FF_SystemTime_t * pxTime );
static void FF_GetTime( FF_SystemTime_t * pxTime,
const uint8_t * pucEntryBuffer,
uint32_t ulOffset );
static void FF_GetDate( FF_SystemTime_t * pxTime,
const uint8_t * pucEntryBuffer,
uint32_t ulOffset );
#endif /* ffconfigTIME_SUPPORT */
static FF_Error_t FF_Traverse( FF_IOManager_t * pxIOManager,
uint32_t ulEntry,
FF_FetchContext_t * pxContext );
static int32_t FF_FindFreeDirent( FF_IOManager_t * pxIOManager,
FF_FindParams_t * pxFindParams,
uint16_t usSequential );
#if ( ffconfigLFN_SUPPORT != 0 )
static int8_t FF_CreateLFNEntry( uint8_t * pucEntryBuffer,
uint8_t * pcName,
UBaseType_t uxNameLength,
UBaseType_t uxLFN,
uint8_t ucCheckSum );
#endif /* ffconfigLFN_SUPPORT */
static BaseType_t FF_ValidShortChar( char cChar );
#if ( ffconfigLFN_SUPPORT != 0 )
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
static FF_Error_t FF_CreateLFNs( FF_IOManager_t * pxIOManager,
uint32_t ulDirCluster,
FF_T_WCHAR * pcName,
uint8_t ucCheckSum,
uint16_t usEntry );
#else
static FF_Error_t FF_CreateLFNs( FF_IOManager_t * pxIOManager,
uint32_t ulDirCluster,
char * pcName,
uint8_t ucCheckSum,
uint16_t usEntry );
#endif /* if ( ffconfigUNICODE_UTF16_SUPPORT != 0 ) */
#endif /* if ( ffconfigLFN_SUPPORT != 0 ) */
#if ( FF_NOSTRCASECMP == 0 )
static portINLINE unsigned char prvToLower( unsigned char c )
{
unsigned char cReturnChar;
if( ( c >= 'A' ) && ( c <= 'Z' ) )
{
cReturnChar = c + 0x20;
}
else
{
cReturnChar = c;
}
return cReturnChar;
}
int strcasecmp( const char * pcString1,
const char * pcString2 )
{
unsigned char c1, c2;
do
{
c1 = ( unsigned char ) *pcString1++;
c2 = ( unsigned char ) *pcString2++;
c1 = prvToLower( c1 );
c2 = prvToLower( c2 );
}
while( ( c1 == c2 ) && ( c1 != '\0' ) );
return ( int ) c1 - c2;
} /* strcasecmp() */
#endif /* if ( FF_NOSTRCASECMP == 0 ) */
/*-----------------------------------------------------------*/
static uint8_t FF_CreateChkSum( const uint8_t * pa_pShortName )
{
uint8_t cNameLen;
uint8_t ChkSum = 0;
for( cNameLen = 11; cNameLen != 0; cNameLen-- )
{
ChkSum = ( uint8_t )
( ( ( ChkSum & 1 ) ? 0x80 : 0 ) + ( ChkSum >> 1 ) + *( pa_pShortName++ ) );
}
return ChkSum;
} /* FF_CreateChkSum() */
/*-----------------------------------------------------------*/
/* _HT_ Does not need a wchar version because a short name is treated a normal string of bytes */
static BaseType_t FF_ShortNameExists( FF_IOManager_t * pxIOManager,
uint32_t ulDirCluster,
char * pcShortName,
FF_Error_t * pxError )
{
BaseType_t xIndex;
const uint8_t * pucEntryBuffer = NULL; /* initialisation not necessary, just for the compiler */
uint8_t ucAttrib;
FF_FetchContext_t xFetchContext;
char pcMyShortName[ FF_SIZEOF_DIRECTORY_ENTRY ];
BaseType_t xResult = -1;
#if ( ffconfigHASH_CACHE != 0 )
uint32_t ulHash;
#endif
*pxError = FF_ERR_NONE;
#if ( ffconfigHASH_CACHE != 0 )
{
if( !FF_DirHashed( pxIOManager, ulDirCluster ) )
{
/* Hash the directory. */
FF_HashDir( pxIOManager, ulDirCluster );
}
#if ffconfigHASH_FUNCTION == CRC16
{
ulHash = ( uint32_t ) FF_GetCRC16( ( uint8_t * ) pcShortName, ( uint32_t ) strlen( pcShortName ) );
}
#else /* ffconfigHASH_FUNCTION == CRC8 */
{
ulHash = ( uint32_t ) FF_GetCRC8( ( uint8_t * ) pcShortName, ( uint32_t ) strlen( pcShortName ) );
}
#endif
{
/* FF_CheckDirentHash result: 0 not found, 1 found, -1 directory not hashed */
xResult = FF_CheckDirentHash( pxIOManager, ulDirCluster, ulHash );
}
}
#endif /* if ( ffconfigHASH_CACHE != 0 ) */
if( xResult < 0 )
{
xResult = pdFALSE;
*pxError = FF_InitEntryFetch( pxIOManager, ulDirCluster, &xFetchContext );
if( FF_isERR( *pxError ) == pdFALSE )
{
for( xIndex = 0; xIndex < FF_MAX_ENTRIES_PER_DIRECTORY; xIndex++ )
{
/* Call FF_FetchEntryWithContext only once for every block (usually 512 bytes) */
if( ( xIndex == 0 ) ||
( pucEntryBuffer >= xFetchContext.pxBuffer->pucBuffer + ( pxIOManager->usSectorSize - FF_SIZEOF_DIRECTORY_ENTRY ) ) )
{
*pxError = FF_FetchEntryWithContext( pxIOManager, ( uint32_t ) xIndex, &xFetchContext, NULL );
if( FF_isERR( *pxError ) )
{
break;
}
pucEntryBuffer = xFetchContext.pxBuffer->pucBuffer;
}
else
{
/* Advance 32 bytes to get the next directory entry. */
pucEntryBuffer += FF_SIZEOF_DIRECTORY_ENTRY;
}
if( FF_isEndOfDir( pucEntryBuffer ) )
{
break;
}
if( FF_isDeleted( pucEntryBuffer ) == pdFALSE )
{
ucAttrib = FF_getChar( pucEntryBuffer, FF_FAT_DIRENT_ATTRIB );
if( ( ucAttrib & FF_FAT_ATTR_LFN ) != FF_FAT_ATTR_LFN )
{
memcpy( pcMyShortName, pucEntryBuffer, sizeof( pcMyShortName ) );
FF_ProcessShortName( pcMyShortName );
if( strcmp( ( const char * ) pcShortName, ( const char * ) pcMyShortName ) == 0 )
{
xResult = pdTRUE;
break;
}
}
}
} /* for ( xIndex = 0; xIndex < FF_MAX_ENTRIES_PER_DIRECTORY; xIndex++ ) */
}
*pxError = FF_CleanupEntryFetch( pxIOManager, &xFetchContext );
}
return xResult;
} /* FF_ShortNameExists() */
/*-----------------------------------------------------------*/
/* _HT_ When adding many files to a single directory, FF_FindEntryInDir was sometimes */
/* _HT_ called 3 times before inserting a single file. With these changes it is called one time only */
/* _HT_ pxFindParams caches some information: */
/* _HT_ 1: the first free entry 2: whether the short-name version already exists */
/* *INDENT-OFF* */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
uint32_t FF_FindEntryInDir( FF_IOManager_t * pxIOManager,
FF_FindParams_t * pxFindParams,
const FF_T_WCHAR * pcName,
uint8_t pa_Attrib,
FF_DirEnt_t * pxDirEntry,
FF_Error_t * pxError )
#else
uint32_t FF_FindEntryInDir( FF_IOManager_t * pxIOManager,
FF_FindParams_t * pxFindParams,
const char * pcName,
uint8_t pa_Attrib,
FF_DirEnt_t * pxDirEntry,
FF_Error_t * pxError )
#endif /* if ( ffconfigUNICODE_UTF16_SUPPORT != 0 ) */
/* *INDENT-ON* */
{
FF_FetchContext_t xFetchContext;
/* const pointer to read from pBuffer */
const uint8_t * src = NULL;
/* As we're walking through a directory, we might as well
* find the first free entry to help FF_FindFreeDirent( )
* The result will be stored in 'pxFindParams->lFreeEntry' */
BaseType_t entriesNeeded;
BaseType_t freeCount = 0;
FF_Error_t xError;
/* If the file name fits into a short file name
* then the existence of that short file name will be checked as well. */
BaseType_t testShortname;
uint32_t xResult = 0ul;
#if ( ffconfigUNICODE_UTF8_SUPPORT == 1 )
int32_t utf8Error;
#endif
#if ( ffconfigLFN_SUPPORT != 0 )
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
FF_T_WCHAR * pcCurPtr; /* Pointer to store a LFN. */
FF_T_WCHAR * pcLastPtr = pxDirEntry->pcFileName + sizeof( pxDirEntry->pcFileName );
#else
char * pcCurPtr; /* Pointer to store a LFN. */
char * pcLastPtr = pxDirEntry->pcFileName + sizeof( pxDirEntry->pcFileName );
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
uint16_t lfnItem = 0;
uint8_t ucCheckSum = 0;
BaseType_t xLFNCount = 0;
BaseType_t xLFNTotal = 0;
uint8_t lastAttrib;
BaseType_t xIndex;
#endif /* ffconfigLFN_SUPPORT */
#if ( ffconfigLFN_SUPPORT != 0 )
{
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
BaseType_t NameLen = ( BaseType_t ) wcslen( ( const char * ) pcName );
#else
BaseType_t NameLen = ( BaseType_t ) strlen( ( const char * ) pcName );
#endif
/* Find enough places for the LFNs and the ShortName. */
entriesNeeded = ( uint8_t ) ( ( NameLen + 12 ) / 13 ) + 1;
}
#else
{
entriesNeeded = 1;
}
#endif /* ffconfigLFN_SUPPORT */
if( ( pxFindParams->ulFlags & FIND_FLAG_FITS_SHORT_OK ) == FIND_FLAG_FITS_SHORT_OK )
{
testShortname = pdTRUE;
}
else
{
testShortname = pdFALSE;
}
pxDirEntry->ucAttrib = 0;
if( ( pxFindParams->ulFlags & FIND_FLAG_CREATE_FLAG ) != 0 )
{
/* A file is to be created: keep track of the first free entry big enough
* to hold this file name. */
pxFindParams->lFreeEntry = -1;
}
else
{
pxFindParams->lFreeEntry = 0;
}
xError = FF_InitEntryFetch( pxIOManager, pxFindParams->ulDirCluster, &xFetchContext );
if( FF_isERR( xError ) == pdFALSE )
{
for( pxDirEntry->usCurrentItem = 0; pxDirEntry->usCurrentItem < FF_MAX_ENTRIES_PER_DIRECTORY; pxDirEntry->usCurrentItem++ )
{
if( ( src == NULL ) ||
( src >= xFetchContext.pxBuffer->pucBuffer + ( pxIOManager->usSectorSize - FF_SIZEOF_DIRECTORY_ENTRY ) ) )
{
xError = FF_FetchEntryWithContext( pxIOManager, pxDirEntry->usCurrentItem, &xFetchContext, NULL );
if( FF_isERR( xError ) != pdFALSE )
{
break;
}
src = xFetchContext.pxBuffer->pucBuffer;
}
else
{
/* Advance 32 bytes. */
src += FF_SIZEOF_DIRECTORY_ENTRY;
}
if( FF_isEndOfDir( src ) )
{
/* 0x00 end-of-dir. */
break;
}
if( FF_isDeleted( src ) )
{
/* Entry not used or deleted. */
pxDirEntry->ucAttrib = 0;
if( ( pxFindParams->lFreeEntry < 0 ) && ( ++freeCount == entriesNeeded ) )
{
/* Remember the beginning entry in the sequential sequence. */
pxFindParams->lFreeEntry = ( pxDirEntry->usCurrentItem - ( int32_t ) ( entriesNeeded - 1 ) );
}
continue;
}
/* The current entry is in use, so reset the free-entry-counter */
freeCount = 0;
#if ( ffconfigLFN_SUPPORT != 0 )
{
lastAttrib = pxDirEntry->ucAttrib;
}
#endif
pxDirEntry->ucAttrib = FF_getChar( src, FF_FAT_DIRENT_ATTRIB );
if( ( pxDirEntry->ucAttrib & FF_FAT_ATTR_LFN ) == FF_FAT_ATTR_LFN )
{
/* LFN Processing. */
#if ( ffconfigLFN_SUPPORT != 0 )
{
if( ( xLFNCount == 0 ) || ( ( lastAttrib & FF_FAT_ATTR_LFN ) != FF_FAT_ATTR_LFN ) )
{
xLFNTotal = xLFNCount = ( BaseType_t ) ( src[ 0 ] & ~0x40 );
lfnItem = pxDirEntry->usCurrentItem;
ucCheckSum = FF_getChar( src, FF_FAT_LFN_CHECKSUM );
pcLastPtr[ -1 ] = '\0';
}
if( xLFNCount != 0 )
{
xLFNCount--;
pcCurPtr = pxDirEntry->pcFileName + ( xLFNCount * 13 );
/*
* This section needs to extract the name and do the comparison
* dependent on UNICODE settings in the FreeRTOSFATConfig.h file.
*/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
{
/* Add UTF-16 Routine here. */
/* Copy first 5 UTF-16 chars ( 10 bytes ). */
memcpy( pcCurPtr, &src[ FF_FAT_LFN_NAME_1 ], 10 );
/* Increment Filename pointer 5 utf16 chars. */
pcCurPtr += 5;
/* Copy next 6 chars ( 12 bytes ). */
memcpy( pcCurPtr, &src[ FF_FAT_LFN_NAME_2 ], 12 );
pcCurPtr += 6;
/* You're getting the idea by now! */
memcpy( pcCurPtr, &src[ FF_FAT_LFN_NAME_3 ], 4 );
pcCurPtr += 2;
} /* ffconfigUNICODE_UTF16_SUPPORT */
#elif ( ffconfigUNICODE_UTF8_SUPPORT != 0 )
{
/* UTF-8 Routine here. */
for( xIndex = 0; ( xIndex < 5 ) && ( pcCurPtr < pcLastPtr ); xIndex++ )
{
/* Was there a surrogate sequence? -- Add handling here. */
utf8Error = FF_Utf16ctoUtf8c( ( uint8_t * ) pcCurPtr, ( uint16_t * ) &src[ FF_FAT_LFN_NAME_1 + ( 2 * xIndex ) ], pcLastPtr - pcCurPtr );
if( utf8Error > 0 )
{
pcCurPtr += utf8Error;
}
else
{
if( FF_GETERROR( utf8Error ) == FF_ERR_UNICODE_INVALID_SEQUENCE )
{
/* Handle potential surrogate sequence across entries. */
}
}
}
for( xIndex = 0; xIndex < 6 && pcCurPtr < pcLastPtr; xIndex++ )
{
/* Was there a surrogate sequence? -- To add handling here. */
utf8Error = FF_Utf16ctoUtf8c( ( uint8_t * ) pcCurPtr, ( uint16_t * ) &src[ FF_FAT_LFN_NAME_2 + ( 2 * xIndex ) ], pcLastPtr - pcCurPtr );
if( utf8Error > 0 )
{
pcCurPtr += utf8Error;
}
else
{
if( FF_GETERROR( utf8Error ) == FF_ERR_UNICODE_INVALID_SEQUENCE )
{
/* Handle potential surrogate sequence across entries. */
}
}
}
for( xIndex = 0; xIndex < 2 && pcCurPtr < pcLastPtr; xIndex++ )
{
/* Was there a surrogate sequence? -- To add handling here. */
utf8Error = FF_Utf16ctoUtf8c( ( uint8_t * ) pcCurPtr, ( uint16_t * ) &src[ FF_FAT_LFN_NAME_3 + ( 2 * xIndex ) ], pcLastPtr - pcCurPtr );
if( utf8Error > 0 )
{
pcCurPtr += utf8Error;
}
else
{
if( FF_GETERROR( utf8Error ) == FF_ERR_UNICODE_INVALID_SEQUENCE )
{
/* Handle potential surrogate sequence across entries. */
}
}
}
} /* ffconfigUNICODE_UTF8_SUPPORT */
#else /* if ( ffconfigUNICODE_UTF16_SUPPORT != 0 ) */
{ /* use ASCII notation. */
for( xIndex = 0; ( xIndex < 10 ) && ( pcCurPtr < pcLastPtr ); xIndex += 2 )
{
*( pcCurPtr++ ) = ( char ) src[ FF_FAT_LFN_NAME_1 + xIndex ];
}
for( xIndex = 0; ( xIndex < 12 ) && ( pcCurPtr < pcLastPtr ); xIndex += 2 )
{
*( pcCurPtr++ ) = ( char ) src[ FF_FAT_LFN_NAME_2 + xIndex ];
}
for( xIndex = 0; ( xIndex < 4 ) && ( pcCurPtr < pcLastPtr ); xIndex += 2 )
{
*( pcCurPtr++ ) = ( char ) src[ FF_FAT_LFN_NAME_3 + xIndex ];
}
}
#endif /* ( ffconfigUNICODE_UTF16_SUPPORT == 0 ) && !( ffconfigUNICODE_UTF8_SUPPORT == 0 ) */
if( ( xLFNCount == xLFNTotal - 1 ) && ( pcCurPtr < pcLastPtr ) )
{
*pcCurPtr = '\0'; /* Important when name len is multiple of 13. */
}
} /* if( xLFNCount ) */
}
#endif /* ffconfigLFN_SUPPORT */
continue;
}
if( ( pxDirEntry->ucAttrib & FF_FAT_ATTR_VOLID ) == FF_FAT_ATTR_VOLID )
{
#if ( ffconfigLFN_SUPPORT != 0 )
{
xLFNTotal = 0;
}
#endif /* ffconfigLFN_SUPPORT */
continue;
}
#if ( ffconfigLFN_SUPPORT != 0 )
if( ( xLFNTotal == 0 ) || ( ucCheckSum != FF_CreateChkSum( src ) ) )
#endif /* ffconfigLFN_SUPPORT */
{
/* This entry has only a short name, or the checksum isn't correct
* Use the short name for comparison */
memcpy( pxDirEntry->pcFileName, src, 11 );
FF_ProcessShortName( ( char * ) pxDirEntry->pcFileName );
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
{
/* FileName now contains a 8-bit short name
* Expand it to a FF_T_WCHAR string. */
FF_ShortNameExpand( pxDirEntry->pcFileName );
}
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
#if ( ffconfigLFN_SUPPORT != 0 )
{
xLFNTotal = 0;
}
#endif /* ffconfigLFN_SUPPORT */
}
/* This function FF_FindEntryInDir( ) is either called with
* pa_Attrib==0 or with pa_Attrib==FF_FAT_ATTR_DIR
* In the last case the caller is looking for a directory */
if( ( pxDirEntry->ucAttrib & pa_Attrib ) == pa_Attrib )
{
if( testShortname )
{
/* Both strings are stored in the directory format
* e.g. "README TXT", without a dot */
if( memcmp( src, pxFindParams->pcEntryBuffer, 11 ) == 0 )
{
pxFindParams->ulFlags |= FIND_FLAG_SHORTNAME_CHECKED | FIND_FLAG_SHORTNAME_FOUND;
}
}
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
if( wcsicmp( ( const char * ) pcName, ( const char * ) pxDirEntry->pcFileName ) == 0 )
#else
if( FF_stricmp( ( const char * ) pcName, ( const char * ) pxDirEntry->pcFileName ) == 0 )
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
{
/* Finally get the complete information. */
#if ( ffconfigLFN_SUPPORT != 0 )
if( xLFNTotal )
{
xError = FF_PopulateLongDirent( pxIOManager, pxDirEntry, ( uint16_t ) lfnItem, &xFetchContext );
if( FF_isERR( xError ) )
{
break;
}
}
else
#endif /* ffconfigLFN_SUPPORT */
{
FF_PopulateShortDirent( pxIOManager, pxDirEntry, src );
/* HT: usCurrentItem wasn't increased here. */
pxDirEntry->usCurrentItem++;
}
/* Object found, the cluster number will be returned. */
xResult = pxDirEntry->ulObjectCluster;
break;
}
}
#if ( ffconfigLFN_SUPPORT != 0 )
{
xLFNTotal = 0;
}
#endif
} /* for( ; pxDirEntry->usCurrentItem < FF_MAX_ENTRIES_PER_DIRECTORY; pxDirEntry->usCurrentItem++ ) */
{
FF_Error_t xTempError;
xTempError = FF_CleanupEntryFetch( pxIOManager, &xFetchContext );
if( FF_isERR( xError ) == pdFALSE )
{
xError = xTempError;
}
}
} /* if( FF_isERR( xError ) == pdFALSE ) */
if( FF_isERR( xError ) == pdFALSE )
{
/* If a free entry wasn't found yet, put it to the current (last) item */
if( pxFindParams->lFreeEntry < 0 )
{
pxFindParams->lFreeEntry = pxDirEntry->usCurrentItem;
}
/* If we were checking the existence of the short-name
* set the Checked flag now */
if( testShortname )
{
pxFindParams->ulFlags |= FIND_FLAG_SHORTNAME_CHECKED;
}
}
if( pxError != NULL )
{
*pxError = xError;
}
return xResult;
} /* FF_FindEntryInDir() */
/*-----------------------------------------------------------*/
/**
* @private
**/
/* *INDENT-OFF* */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
uint32_t FF_FindDir( FF_IOManager_t * pxIOManager,
const FF_T_WCHAR * pcPath,
uint16_t pathLen,
FF_Error_t * pxError )
#else
uint32_t FF_FindDir( FF_IOManager_t * pxIOManager,
const char * pcPath,
uint16_t pathLen,
FF_Error_t * pxError )
#endif
/* *INDENT-ON* */
{
uint16_t it = 0; /* Re-entrancy Variables for FF_strtok( ). */
BaseType_t last = pdFALSE;
FF_DirEnt_t xMyDirectory;
FF_FindParams_t xFindParams;
FF_Error_t xError;
BaseType_t xFound;
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
FF_T_WCHAR mytoken[ ffconfigMAX_FILENAME ];
FF_T_WCHAR * pcToken;
#else
char mytoken[ ffconfigMAX_FILENAME ];
char * pcToken;
#endif
#if ( ffconfigPATH_CACHE != 0 )
BaseType_t xIndex;
#endif
memset( &xFindParams, '\0', sizeof( xFindParams ) );
xFindParams.ulDirCluster = pxIOManager->xPartition.ulRootDirCluster;
xError = FF_ERR_NONE;
if( pathLen <= 1 )
{
/* Must be the root directory.
* 'xFindParams.ulDirCluster' will be returned containing 'pxIOManager->xPartition.ulRootDirCluster'. */
xFound = pdTRUE;
}
else
{
/* Only the root directory '/' shall have a trailing slash in its name. */
if( ( pcPath[ pathLen - 1 ] == '\\' ) || ( pcPath[ pathLen - 1 ] == '/' ) )
{
pathLen--;
}
xFound = pdFALSE;
#if ( ffconfigPATH_CACHE != 0 ) /* Is the requested pcPath in the PATH CACHE? */
{
FF_PendSemaphore( pxIOManager->pvSemaphore ); /* Thread safety on shared object! */
{
for( xIndex = 0; xIndex < ffconfigPATH_CACHE_DEPTH; xIndex++ )
{
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
if( wcslen( pxIOManager->xPartition.pxPathCache[ xIndex ].pcPath ) == ( size_t ) pathLen )
#else
if( strlen( pxIOManager->xPartition.pxPathCache[ xIndex ].pcPath ) == ( size_t ) pathLen )
#endif
{
if( FF_strmatch( pxIOManager->xPartition.pxPathCache[ xIndex ].pcPath, pcPath, pathLen ) )
{
xFindParams.ulDirCluster = pxIOManager->xPartition.pxPathCache[ xIndex ].ulDirCluster;
xFound = pdTRUE;
break;
}
}
}
}
FF_ReleaseSemaphore( pxIOManager->pvSemaphore );
}
#endif /* ffconfigPATH_CACHE */
}
if( xFound == pdFALSE )
{
pcToken = FF_strtok( pcPath, mytoken, &it, &last, pathLen );
do
{
xMyDirectory.usCurrentItem = 0;
xFindParams.ulDirCluster = FF_FindEntryInDir( pxIOManager, &xFindParams, pcToken, ( uint8_t ) FF_FAT_ATTR_DIR, &xMyDirectory, &xError );
if( xFindParams.ulDirCluster == 0ul )
{
break;
}
pcToken = FF_strtok( pcPath, mytoken, &it, &last, pathLen );
} while( pcToken != NULL );
if( ( pcToken != NULL ) &&
( ( FF_isERR( xError ) == pdFALSE ) || ( FF_GETERROR( xError ) == FF_ERR_DIR_END_OF_DIR ) ) )
{
xError = FF_createERR( FF_FINDDIR, FF_ERR_FILE_INVALID_PATH );
}
#if ( ffconfigPATH_CACHE != 0 ) /* Update the PATH CACHE with a new PATH. */
{
/* Only cache if the dir was actually found! */
if( ( FF_isERR( xError ) == pdFALSE ) && ( xFindParams.ulDirCluster != 0ul ) )
{
FF_PendSemaphore( pxIOManager->pvSemaphore );
{
if( pathLen < ffconfigMAX_FILENAME ) /* Ensure the PATH won't cause a buffer overrun. */
{
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
{
memcpy( pxIOManager->xPartition.pxPathCache[ pxIOManager->xPartition.ulPCIndex ].pcPath, pcPath, pathLen * sizeof( FF_T_WCHAR ) );
}
#else
{
memcpy( pxIOManager->xPartition.pxPathCache[ pxIOManager->xPartition.ulPCIndex ].pcPath, pcPath, pathLen );
}
#endif
pxIOManager->xPartition.pxPathCache[ pxIOManager->xPartition.ulPCIndex ].pcPath[ pathLen ] = '\0';
pxIOManager->xPartition.pxPathCache[ pxIOManager->xPartition.ulPCIndex ].ulDirCluster = xFindParams.ulDirCluster;
pxIOManager->xPartition.ulPCIndex += 1;
if( pxIOManager->xPartition.ulPCIndex >= ffconfigPATH_CACHE_DEPTH )
{
pxIOManager->xPartition.ulPCIndex = 0;
}
}
}
FF_ReleaseSemaphore( pxIOManager->pvSemaphore );
}
}
#endif /* ffconfigPATH_CACHE */
} /* if( pathLen > 1 ) */
if( pxError != NULL )
{
*pxError = xError;
}
return xFindParams.ulDirCluster;
} /* FF_FindDir() */
/*-----------------------------------------------------------*/
#if ( ffconfigSHORTNAME_CASE != 0 )
/**
* * For short-name entries, NT/XP etc store case information in byte 0x0c
* Use this to show proper case of "README.txt" or "source.H"
**/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
static void FF_CaseShortName( FF_T_WCHAR * pcName,
uint8_t attrib )
#else
static void FF_CaseShortName( char * pcName,
uint8_t attrib )
#endif
{
uint8_t testAttrib = FF_FAT_CASE_ATTR_BASE;
for( ; *pcName != '\0'; pcName++ )
{
if( *pcName == '.' )
{
testAttrib = FF_FAT_CASE_ATTR_EXT;
}
else if( ( attrib & testAttrib ) != 0 )
{
if( ( *pcName >= 'A' ) && ( *pcName <= 'Z' ) )
{
*pcName += 0x20;
}
}
else if( ( *pcName >= 'a' ) && ( *pcName <= 'z' ) )
{
*pcName -= 0x20;
}
}
}
#endif /* ffconfigSHORTNAME_CASE */
/*-----------------------------------------------------------*/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
/**
* **/
static void FF_ShortNameExpand( FF_T_WCHAR * pFileName )
{
int8_t * pSource = ( ( int8_t * ) pFileName ) + 13;
int8_t * pTarget = ( ( int8_t * ) pFileName ) + 26;
/* "aaaaaaaa.eee": 12 characters plus a zero makes 13
* Copy from the right to the left */
while( pTarget > ( int8_t * ) pFileName )
{
pTarget[ -1 ] = 0;
pTarget[ -2 ] = *( --pSource );
pTarget -= 2;
}
}
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
/*-----------------------------------------------------------*/
static void FF_ProcessShortName( char * pcName )
{
char pcShortName[ 13 ];
char * pcTarget = pcName;
int iSource;
memcpy( pcShortName, pcName, 11 );
for( iSource = 0; iSource < 11; iSource++ )
{
if( pcShortName[ iSource ] == 0x20 )
{
if( iSource >= 8 )
{
break;
}
iSource = 7;
}
else
{
if( iSource == 8 )
{
*( pcTarget++ ) = '.';
}
*( pcTarget++ ) = pcShortName[ iSource ];
}
}
*pcTarget = '\0';
}
/*-----------------------------------------------------------*/
#if ( ffconfigTIME_SUPPORT != 0 )
static void FF_PlaceTime( uint8_t * pucEntryBuffer,
uint32_t Offset,
FF_SystemTime_t * pxTime )
{
uint16_t myShort;
/* HT time changes:
* E.g. Unzip needs to use original time rather than
* the result of FF_GetSystemTime */
myShort = 0;
myShort |= ( ( pxTime->Hour << 11 ) & 0xF800 );
myShort |= ( ( pxTime->Minute << 5 ) & 0x07E0 );
myShort |= ( ( pxTime->Second / 2 ) & 0x001F );
FF_putShort( pucEntryBuffer, ( uint16_t ) Offset, myShort );
}
#endif /* ffconfigTIME_SUPPORT */
/*-----------------------------------------------------------*/
#if ( ffconfigTIME_SUPPORT != 0 )
static void FF_PlaceDate( uint8_t * pucEntryBuffer,
uint32_t Offset,
FF_SystemTime_t * pxTime )
{
uint16_t myShort;
/* HT time changes:
* Unzip needs to use original date rather than
* the current date, so make it a parameter. */
myShort = 0;
myShort |= ( ( ( pxTime->Year - 1980 ) << 9 ) & 0xFE00 );
myShort |= ( ( pxTime->Month << 5 ) & 0x01E0 );
myShort |= ( pxTime->Day & 0x001F );
FF_putShort( pucEntryBuffer, ( uint16_t ) Offset, myShort );
}
#endif /* ffconfigTIME_SUPPORT */
/*-----------------------------------------------------------*/
#if ( ffconfigTIME_SUPPORT != 0 )
static void FF_GetTime( FF_SystemTime_t * pxTime,
const uint8_t * pucEntryBuffer,
uint32_t Offset )
{
uint16_t myShort;
myShort = FF_getShort( pucEntryBuffer, ( uint16_t ) Offset );
pxTime->Hour = ( ( ( myShort & 0xF800 ) >> 11 ) & 0x001F );
pxTime->Minute = ( ( ( myShort & 0x07E0 ) >> 5 ) & 0x003F );
pxTime->Second = 2 * ( myShort & 0x01F );
}
#endif /* ffconfigTIME_SUPPORT */
/*-----------------------------------------------------------*/
#if ( ffconfigTIME_SUPPORT != 0 )
static void FF_GetDate( FF_SystemTime_t * pxTime,
const uint8_t * pucEntryBuffer,
uint32_t Offset )
{
uint16_t myShort;
myShort = FF_getShort( pucEntryBuffer, ( uint16_t ) Offset );
pxTime->Year = 1980 + ( ( ( myShort & 0xFE00 ) >> 9 ) & 0x07F );