#include <FsFile.h>

Inheritance diagram for FsBaseFile:

Public Member Functions
int	available ()

void	clearWriteError ()

bool	close ()

bool	contiguousRange (uint32_t bgnSector, uint32_t endSector)

uint64_t	curPosition ()

uint32_t	dirIndex ()

bool	exists (const char *path)

void	fgetpos (fspos_t *pos)

int	fgets (char str, int num, char delim=nullptr)

uint64_t	fileSize ()

uint32_t	firstSector ()

void	flush ()

	FsBaseFile (const FsBaseFile &from)

void	fsetpos (const fspos_t *pos)

bool	getAccessDateTime (uint16_t pdate, uint16_t ptime)

bool	getCreateDateTime (uint16_t pdate, uint16_t ptime)

uint8_t	getError ()

bool	getModifyDateTime (uint16_t pdate, uint16_t ptime)

size_t	getName (char *name, size_t len)

bool	getWriteError ()

bool	isContiguous ()

bool	isDir ()

bool	isDirectory ()

bool	isHidden ()

bool	isOpen ()

bool	isSubDir ()

bool	ls (print_t *pr)

bool	ls (print_t *pr, uint8_t flags)

bool	mkdir (FsBaseFile dir, const char path, bool pFlag=true)

const char *	name () const

bool	open (const char *path, oflag_t oflag=O_RDONLY)

bool	open (FsBaseFile dir, const char path, oflag_t oflag=O_RDONLY)

bool	open (FsBaseFile *dir, uint32_t index, oflag_t oflag)

bool	open (FsVolume vol, const char path, oflag_t oflag)

bool	openNext (FsBaseFile *dir, oflag_t oflag=O_RDONLY)

	operator bool ()

FsBaseFile &	operator= (const FsBaseFile &from)

int	peek ()

uint64_t	position ()

bool	preAllocate (uint64_t length)

size_t	printAccessDateTime (print_t *pr)

size_t	printCreateDateTime (print_t *pr)

size_t	printField (double value, char term, uint8_t prec=2)

size_t	printField (float value, char term, uint8_t prec=2)

template<typename Type >
size_t	printField (Type value, char term)

size_t	printFileSize (print_t *pr)

size_t	printModifyDateTime (print_t *pr)

size_t	printName (print_t *pr)

int	read ()

int	read (void *buf, size_t count)

bool	remove ()

bool	remove (const char *path)

bool	rename (const char *newPath)

bool	rename (FsBaseFile dirFile, const char newPath)

void	rewind ()

void	rewindDirectory ()

bool	rmdir ()

bool	seek (uint64_t pos)

bool	seekCur (int64_t offset)

bool	seekEnd (int64_t offset=0)

bool	seekSet (uint64_t pos)

uint64_t	size ()

bool	sync ()

bool	timestamp (uint8_t flags, uint16_t year, uint8_t month, uint8_t day, uint8_t hour, uint8_t minute, uint8_t second)

bool	truncate ()

bool	truncate (uint64_t length)

size_t	write (const void *buf, size_t count)

size_t	write (uint8_t b)

Detailed Description

FsBaseFile class.

Constructor & Destructor Documentation

◆ FsBaseFile()

FsBaseFile::FsBaseFile ( const FsBaseFile & from )

Copy constructor.

Parameters

[in] from Object used to initialize this instance.

MIT License

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.

Member Function Documentation

◆ available()

int FsBaseFile::available ( )

inline

Returns: number of bytes available from the current position to EOF or INT_MAX if more than INT_MAX bytes are available.

◆ clearWriteError()

void FsBaseFile::clearWriteError ( )

inline

Clear writeError.

◆ close()

bool FsBaseFile::close ( )

Close a file and force cached data and directory information to be written to the storage device.

Returns: true for success or false for failure.

◆ contiguousRange()

bool FsBaseFile::contiguousRange	(	uint32_t *	bgnSector,
		uint32_t *	endSector
	)

inline

Check for contiguous file and return its raw sector range.

Parameters

[out]	bgnSector	the first sector address for the file.
[out]	endSector	the last sector address for the file.

Set contiguous flag for FAT16/FAT32 files. Parameters may be nullptr.

Returns: true for success or false for failure.

◆ curPosition()

uint64_t FsBaseFile::curPosition ( )

inline

Returns: The current position for a file or directory.

◆ dirIndex()

uint32_t FsBaseFile::dirIndex ( )

inline

Returns: Directory entry index.

◆ exists()

bool FsBaseFile::exists ( const char * path )

inline

Test for the existence of a file in a directory

Parameters

[in] path Path of the file to be tested for.

The calling instance must be an open directory file.

dirFile.exists("TOFIND.TXT") searches for "TOFIND.TXT" in the directory dirFile.

Returns: true if the file exists else false.

◆ fgetpos()

void FsBaseFile::fgetpos ( fspos_t * pos )

inline

get position for streams

Parameters

[out] pos struct to receive position

◆ fgets()

int FsBaseFile::fgets	(	char *	str,
		int	num,
		char *	delim = `nullptr`
	)

inline

Get a string from a file.

fgets() reads bytes from a file into the array pointed to by str, until num - 1 bytes are read, or a delimiter is read and transferred to str, or end-of-file is encountered. The string is then terminated with a null byte.

fgets() deletes CR, '\r', from the string. This insures only a '\n' terminates the string for Windows text files which use CRLF for newline.

Parameters

[out]	str	Pointer to the array where the string is stored.
[in]	num	Maximum number of characters to be read (including the final null byte). Usually the length of the array str is used.
[in]	delim	Optional set of delimiters. The default is "\n".

Returns: For success fgets() returns the length of the string in str. If no data is read, fgets() returns zero for EOF or -1 if an error occurred.

◆ fileSize()

uint64_t FsBaseFile::fileSize ( )

inline

Returns: The total number of bytes in a file.

◆ firstSector()

uint32_t FsBaseFile::firstSector ( )

inline

Returns: Address of first sector or zero for empty file.

◆ flush()

void FsBaseFile::flush ( )

inline

Ensure that any bytes written to the file are saved to the SD card.

◆ fsetpos()

void FsBaseFile::fsetpos ( const fspos_t * pos )

inline

set position for streams

Parameters

[in] pos struct with value for new position

◆ getAccessDateTime()

bool FsBaseFile::getAccessDateTime	(	uint16_t *	pdate,
		uint16_t *	ptime
	)

inline

Get a file's access date and time.

Parameters

[out]	pdate	Packed date for directory entry.
[out]	ptime	Packed time for directory entry.

Returns: true for success or false for failure.

◆ getCreateDateTime()

bool FsBaseFile::getCreateDateTime	(	uint16_t *	pdate,
		uint16_t *	ptime
	)

inline

Get a file's create date and time.

Parameters

[out]	pdate	Packed date for directory entry.
[out]	ptime	Packed time for directory entry.

Returns: true for success or false for failure.

◆ getError()

uint8_t FsBaseFile::getError ( )

inline

Returns: All error bits.

◆ getModifyDateTime()

bool FsBaseFile::getModifyDateTime	(	uint16_t *	pdate,
		uint16_t *	ptime
	)

inline

Get a file's Modify date and time.

Parameters

[out]	pdate	Packed date for directory entry.
[out]	ptime	Packed time for directory entry.

Returns: true for success or false for failure.

◆ getName()

size_t FsBaseFile::getName	(	char *	name,
		size_t	len
	)

inline

Get a file's name followed by a zero byte.

Parameters

[out]	name	An array of characters for the file's name.
[in]	len	The size of the array in bytes. The array must be at least 13 bytes long. The file's name will be truncated if the file's name is too long.

Returns: The length of the returned string.

◆ getWriteError()

bool FsBaseFile::getWriteError ( )

inline

Returns: value of writeError

◆ isContiguous()

bool FsBaseFile::isContiguous ( )

inline

Returns: True if the file is contiguous.

◆ isDir()

bool FsBaseFile::isDir ( )

inline

Returns: True if this is a directory else false.

◆ isDirectory()

bool FsBaseFile::isDirectory ( )

inline

This function reports if the current file is a directory or not.

Returns: true if the file is a directory.

◆ isHidden()

bool FsBaseFile::isHidden ( )

inline

Returns: True if this is a hidden file else false.

◆ isOpen()

bool FsBaseFile::isOpen ( )

inline

Returns: True if this is an open file/directory else false.

◆ isSubDir()

bool FsBaseFile::isSubDir ( )

inline

Returns: True if this is a subdirectory file else false.

◆ ls() [1/2]

bool FsBaseFile::ls ( print_t * pr )

inline

List directory contents.

Parameters

[in] pr Print object.

Returns: true for success or false for failure.

◆ ls() [2/2]

bool FsBaseFile::ls	(	print_t *	pr,
		uint8_t	flags
	)

inline

List directory contents.

Parameters

[in]	pr	Print object.
[in]	flags	The inclusive OR of

LS_DATE - Print file modification date

LS_SIZE - Print file size.

LS_R - Recursive list of subdirectories.

Returns: true for success or false for failure.

◆ mkdir()

bool FsBaseFile::mkdir	(	FsBaseFile *	dir,
		const char *	path,
		bool	pFlag = `true`
	)

Make a new directory.

Parameters

[in]	dir	An open FatFile instance for the directory that will contain the new directory.
[in]	path	A path with a valid 8.3 DOS name for the new directory.
[in]	pFlag	Create missing parent directories if true.

Returns: true for success or false for failure.

◆ name()

const char* FsBaseFile::name ( ) const

inline

No longer implemented due to Long File Names.

Use getName(char* name, size_t size).

Returns: a pointer to replacement suggestion.

◆ open() [1/4]

bool FsBaseFile::open	(	const char *	path,
		oflag_t	oflag = `O_RDONLY`
	)

inline

Open a file or directory by name.

Parameters

[in]	path	A path for a file to be opened.
[in]	oflag	Values for oflag are constructed by a bitwise-inclusive OR of open flags.

Returns: true for success or false for failure.

◆ open() [2/4]

bool FsBaseFile::open	(	FsBaseFile *	dir,
		const char *	path,
		oflag_t	oflag = `O_RDONLY`
	)

Open a file or directory by name.

Parameters

[in]	dir	An open file instance for the directory containing the file to be opened.
[in]	path	A path with a valid 8.3 DOS name for a file to be opened.
[in]	oflag	Values for oflag are constructed by a bitwise-inclusive OR of flags from the following list

O_RDONLY - Open for reading only..

O_READ - Same as O_RDONLY.

O_WRONLY - Open for writing only.

O_WRITE - Same as O_WRONLY.

O_RDWR - Open for reading and writing.

O_APPEND - If set, the file offset shall be set to the end of the file prior to each write.

O_AT_END - Set the initial position at the end of the file.

O_CREAT - If the file exists, this flag has no effect except as noted under O_EXCL below. Otherwise, the file shall be created

O_EXCL - If O_CREAT and O_EXCL are set, open() shall fail if the file exists.

O_TRUNC - If the file exists and is a regular file, and the file is successfully opened and is not read only, its length shall be truncated to 0.

WARNING: A given file must not be opened by more than one file object or file corruption may occur.

Note: Directory files must be opened read only. Write and truncation is not allowed for directory files.

Returns: true for success or false for failure.

◆ open() [3/4]

bool FsBaseFile::open	(	FsBaseFile *	dir,
		uint32_t	index,
		oflag_t	oflag
	)

Open a file by index.

Parameters

[in]	dir	An open FsFile instance for the directory.
[in]	index	The index of the directory entry for the file to be opened. The value for index is (directory file position)/32.
[in]	oflag	bitwise-inclusive OR of open flags. See see FsFile::open(FsFile, const char, uint8_t).

See open() by path for definition of flags.

Returns: true for success or false for failure.

◆ open() [4/4]

bool FsBaseFile::open	(	FsVolume *	vol,
		const char *	path,
		oflag_t	oflag
	)

Open a file or directory by name.

Parameters

[in]	vol	Volume where the file is located.
[in]	path	A path for a file to be opened.
[in]	oflag	Values for oflag are constructed by a bitwise-inclusive OR of open flags.

Returns: true for success or false for failure.

◆ openNext()

bool FsBaseFile::openNext	(	FsBaseFile *	dir,
		oflag_t	oflag = `O_RDONLY`
	)

Opens the next file or folder in a directory.

Parameters

[in]	dir	directory containing files.
[in]	oflag	open flags.

Returns: a file object.

◆ operator bool()

FsBaseFile::operator bool ( )

inline

The parenthesis operator.

Returns: true if a file is open.

◆ operator=()

FsBaseFile & FsBaseFile::operator= ( const FsBaseFile & from )

Copy assignment operator

Parameters

[in] from Object used to initialize this instance.

Returns: assigned object.

◆ peek()

int FsBaseFile::peek ( )

inline

Return the next available byte without consuming it.

Returns: The byte if no error and not at eof else -1;

◆ position()

uint64_t FsBaseFile::position ( )

inline

Returns: the current file position.

◆ preAllocate()

bool FsBaseFile::preAllocate ( uint64_t length )

inline

Allocate contiguous clusters to an empty file.

The file must be empty with no clusters allocated.

The file will contain uninitialized data for FAT16/FAT32 files. exFAT files will have zero validLength and dataLength will equal the requested length.

Parameters

[in] length size of the file in bytes.

Returns: true for success or false for failure.

◆ printAccessDateTime()

size_t FsBaseFile::printAccessDateTime ( print_t * pr )

inline

Print a file's access date and time

Parameters

[in] pr Print stream for output.

Returns: true for success or false for failure.

◆ printCreateDateTime()

size_t FsBaseFile::printCreateDateTime ( print_t * pr )

inline

Print a file's creation date and time

Parameters

[in] pr Print stream for output.

Returns: true for success or false for failure.

◆ printField() [1/3]

size_t FsBaseFile::printField	(	double	value,
		char	term,
		uint8_t	prec = `2`
	)

inline

Print a number followed by a field terminator.

Parameters

[in]	value	The number to be printed.
[in]	term	The field terminator. Use '\n' for CR LF.
[in]	prec	Number of digits after decimal point.

Returns: The number of bytes written or -1 if an error occurs.

◆ printField() [2/3]

size_t FsBaseFile::printField	(	float	value,
		char	term,
		uint8_t	prec = `2`
	)

inline

Print a number followed by a field terminator.

Parameters

[in]	value	The number to be printed.
[in]	term	The field terminator. Use '\n' for CR LF.
[in]	prec	Number of digits after decimal point.

Returns: The number of bytes written or -1 if an error occurs.

◆ printField() [3/3]

template<typename Type >

size_t FsBaseFile::printField	(	Type	value,
		char	term
	)

inline

Print a number followed by a field terminator.

Parameters

[in]	value	The number to be printed.
[in]	term	The field terminator. Use '\n' for CR LF.

Returns: The number of bytes written or -1 if an error occurs.

◆ printFileSize()

size_t FsBaseFile::printFileSize ( print_t * pr )

inline

Print a file's size.

Parameters

[in] pr Print stream for output.

Returns: The number of characters printed is returned for success and zero is returned for failure.

◆ printModifyDateTime()

size_t FsBaseFile::printModifyDateTime ( print_t * pr )

inline

Print a file's modify date and time

Parameters

[in] pr Print stream for output.

Returns: true for success or false for failure.

◆ printName()

size_t FsBaseFile::printName ( print_t * pr )

inline

Print a file's name

Parameters

[in] pr Print stream for output.

Returns: true for success or false for failure.

◆ read() [1/2]

int FsBaseFile::read ( )

inline

Read the next byte from a file.

Returns: For success return the next byte in the file as an int. If an error occurs or end of file is reached return -1.

◆ read() [2/2]

int FsBaseFile::read	(	void *	buf,
		size_t	count
	)

inline

Read data from a file starting at the current position.

Parameters

[out]	buf	Pointer to the location that will receive the data.
[in]	count	Maximum number of bytes to read.

Returns: For success read() returns the number of bytes read. A value less than count, including zero, will be returned if end of file is reached. If an error occurs, read() returns -1. Possible errors include read() called before a file has been opened, corrupt file system or an I/O error occurred.

◆ remove() [1/2]

bool FsBaseFile::remove ( )

Remove a file.

The directory entry and all data for the file are deleted.

Note: This function should not be used to delete the 8.3 version of a file that has a long name. For example if a file has the long name "New Text Document.txt" you should not delete the 8.3 name "NEWTEX~1.TXT".

Returns: true for success or false for failure.

◆ remove() [2/2]

bool FsBaseFile::remove ( const char * path )

inline

Remove a file.

The directory entry and all data for the file are deleted.

Parameters

[in] path Path for the file to be removed.

Example use: dirFile.remove(filenameToRemove);

Note: This function should not be used to delete the 8.3 version of a file that has a long name. For example if a file has the long name "New Text Document.txt" you should not delete the 8.3 name "NEWTEX~1.TXT".

Returns: true for success or false for failure.

◆ rename() [1/2]

bool FsBaseFile::rename ( const char * newPath )

inline

Rename a file or subdirectory.

Parameters

[in] newPath New path name for the file/directory.

Returns: true for success or false for failure.

◆ rename() [2/2]

bool FsBaseFile::rename	(	FsBaseFile *	dirFile,
		const char *	newPath
	)

inline

Rename a file or subdirectory.

Parameters

[in]	dirFile	Directory for the new path.
[in]	newPath	New path name for the file/directory.

Returns: true for success or false for failure.

◆ rewind()

void FsBaseFile::rewind ( )

inline

Set the file's current position to zero.

◆ rewindDirectory()

void FsBaseFile::rewindDirectory ( )

inline

Rewind a file if it is a directory

◆ rmdir()

bool FsBaseFile::rmdir ( )

Remove a directory file.

The directory file will be removed only if it is empty and is not the root directory. rmdir() follows DOS and Windows and ignores the read-only attribute for the directory.

Note: This function should not be used to delete the 8.3 version of a directory that has a long name. For example if a directory has the long name "New folder" you should not delete the 8.3 name "NEWFOL~1".

Returns: true for success or false for failure.

◆ seek()

bool FsBaseFile::seek ( uint64_t pos )

inline

Seek to a new position in the file, which must be between 0 and the size of the file (inclusive).

Parameters

[in] pos the new file position.

Returns: true for success or false for failure.

◆ seekCur()

bool FsBaseFile::seekCur ( int64_t offset )

inline

Set the files position to current position + pos. See seekSet().

Parameters

[in] offset The new position in bytes from the current position.

Returns: true for success or false for failure.

◆ seekEnd()

bool FsBaseFile::seekEnd ( int64_t offset = 0 )

inline

Set the files position to end-of-file + offset. See seekSet(). Can't be used for directory files since file size is not defined.

Parameters

[in] offset The new position in bytes from end-of-file.

Returns: true for success or false for failure.

◆ seekSet()

bool FsBaseFile::seekSet ( uint64_t pos )

inline

Sets a file's position.

Parameters

[in] pos The new position in bytes from the beginning of the file.

Returns: true for success or false for failure.

◆ size()

uint64_t FsBaseFile::size ( )

inline

Returns: the file's size.

◆ sync()

bool FsBaseFile::sync ( )

inline

The sync() call causes all modified data and directory fields to be written to the storage device.

Returns: true for success or false for failure.

◆ timestamp()

bool FsBaseFile::timestamp	(	uint8_t	flags,
		uint16_t	year,
		uint8_t	month,
		uint8_t	day,
		uint8_t	hour,
		uint8_t	minute,
		uint8_t	second
	)

inline

Set a file's timestamps in its directory entry.

Parameters

[in] flags Values for flags are constructed by a bitwise-inclusive OR of flags from the following list

T_ACCESS - Set the file's last access date and time.

T_CREATE - Set the file's creation date and time.

T_WRITE - Set the file's last write/modification date and time.

Parameters

[in]	year	Valid range 1980 - 2107 inclusive.
[in]	month	Valid range 1 - 12 inclusive.
[in]	day	Valid range 1 - 31 inclusive.
[in]	hour	Valid range 0 - 23 inclusive.
[in]	minute	Valid range 0 - 59 inclusive.
[in]	second	Valid range 0 - 59 inclusive

Note: It is possible to set an invalid date since there is no check for the number of days in a month.; Modify and access timestamps may be overwritten if a date time callback function has been set by dateTimeCallback().

Returns: true for success or false for failure.

◆ truncate() [1/2]

bool FsBaseFile::truncate ( )

inline

Truncate a file to the current position.

Returns: true for success or false for failure.

◆ truncate() [2/2]

bool FsBaseFile::truncate ( uint64_t length )

inline

Truncate a file to a specified length. The current file position will be set to end of file.

Parameters

[in] length The desired length for the file.

Returns: true for success or false for failure.

◆ write() [1/2]

size_t FsBaseFile::write	(	const void *	buf,
		size_t	count
	)

inline

Write data to an open file.

Note: Data is moved to the cache but may not be written to the storage device until sync() is called.

Parameters

[in]	buf	Pointer to the location of the data to be written.
[in]	count	Number of bytes to write.

Returns: For success write() returns the number of bytes written, always nbyte. If an error occurs, write() returns -1. Possible errors include write() is called before a file has been opened, write is called for a read-only file, device is full, a corrupt file system or an I/O error.

◆ write() [2/2]

size_t FsBaseFile::write ( uint8_t b )

inline

Write a byte to a file. Required by the Arduino Print class.

Parameters

[in] b the byte to be written. Use getWriteError to check for errors.

Returns: 1 for success and 0 for failure.

The documentation for this class was generated from the following files:

Arduino/libraries/SdFat/src/FsLib/FsFile.h
Arduino/libraries/SdFat/src/FsLib/FsFile.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ FsBaseFile()

Member Function Documentation

◆ available()

◆ clearWriteError()

◆ close()

◆ contiguousRange()

◆ curPosition()

◆ dirIndex()

◆ exists()

◆ fgetpos()

◆ fgets()

◆ fileSize()

◆ firstSector()

◆ flush()

◆ fsetpos()

◆ getAccessDateTime()

◆ getCreateDateTime()

◆ getError()

◆ getModifyDateTime()

◆ getName()

◆ getWriteError()

◆ isContiguous()

◆ isDir()

◆ isDirectory()

◆ isHidden()

◆ isOpen()

◆ isSubDir()

◆ ls() [1/2]

◆ ls() [2/2]

◆ mkdir()

◆ name()

◆ open() [1/4]

◆ open() [2/4]

◆ open() [3/4]

◆ open() [4/4]

◆ openNext()

◆ operator bool()

◆ operator=()

◆ peek()

◆ position()

◆ preAllocate()

◆ printAccessDateTime()

◆ printCreateDateTime()

◆ printField() [1/3]

◆ printField() [2/3]

◆ printField() [3/3]

◆ printFileSize()

◆ printModifyDateTime()

◆ printName()

◆ read() [1/2]

◆ read() [2/2]

◆ remove() [1/2]

◆ remove() [2/2]

◆ rename() [1/2]

◆ rename() [2/2]

◆ rewind()

◆ rewindDirectory()

◆ rmdir()

◆ seek()

◆ seekCur()

◆ seekEnd()

◆ seekSet()

◆ size()

◆ sync()

◆ timestamp()

◆ truncate() [1/2]

◆ truncate() [2/2]

◆ write() [1/2]

◆ write() [2/2]