Base64 Stream. More...

#include <Base64OutputStream.h>

Inheritance diagram for Base64OutputStream:
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Collaboration diagram for Base64OutputStream:
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Public Member Functions

 Base64OutputStream (IDataSourceStream *stream, size_t resultSize=500)
 Stream that transforms bytes of data into base64 data stream. More...
 
size_t transform (const uint8_t *source, size_t sourceLength, uint8_t *target, size_t targetLength) override
 Inherited class implements this method to transform a block of data. More...
 
void saveState () override
 A method that backs up the current state. More...
 
void restoreState () override
 A method that restores the last backed up state. More...
 
StreamType getStreamType () const override
 Get the stream type. More...
 
int available () override
 Return the total length of the stream. More...
 
uint16_t readMemoryBlock (char *data, int bufSize) override
 Read a block of memory. More...
 
bool seek (int len) override
 Move read cursor. More...
 
bool isFinished () override
 Check if all data has been read. More...
 
String getName () const override
 Returns name of the resource. More...
 
virtual bool isValid () const
 Determine if the stream object contains valid data. More...
 
int read () override
 Read one character and moves the stream pointer. More...
 
int peek () override
 Read a character without advancing the stream pointer. More...
 
virtual int seekFrom (int offset, unsigned origin)
 Change position in stream. More...
 
size_t write (uint8_t charToWrite) override
 From Stream class: We don't write using this stream. More...
 
size_t write (const char *str)
 Writes a c-string to output stream. More...
 
virtual size_t write (const uint8_t *buffer, size_t size)
 Writes characters from a buffer to output stream. More...
 
size_t write (const char *buffer, size_t size)
 Writes characters from a buffer to output stream. More...
 
int length ()
 Return the total length of the stream. More...
 
void flush () override
 
virtual String id () const
 Returns unique id of the resource. More...
 
String readString (size_t maxLen=UINT16_MAX)
 Overrides Stream method for more efficient reading. More...
 
String readString ()
 
void setTimeout (unsigned long timeout)
 
bool find (char *target)
 
bool find (char *target, size_t length)
 
bool findUntil (char *target, char *terminator)
 
bool findUntil (char *target, size_t targetLen, char *terminate, size_t termLen)
 
long parseInt ()
 
float parseFloat ()
 
size_t readBytes (char *buffer, size_t length)
 
size_t readBytesUntil (char terminator, char *buffer, size_t length)
 
String readStringUntil (char terminator)
 
virtual int indexOf (char c)
 
int getWriteError ()
 Gets last error. More...
 
void clearWriteError ()
 Clears the last write error. More...
 
size_t print (char c)
 Prints a single character to output stream. More...
 
size_t print (const char str[])
 Prints a c-string to output stream. More...
 
size_t print (double num, int digits=2)
 Print a floating-point number to output stream. More...
 
size_t print (const Printable &p)
 Prints a Printable object to output stream. More...
 
size_t print (const String &s)
 Prints a String to output stream. More...
 
size_t println ()
 Prints a newline to output stream. More...
 
size_t println (const char str[])
 Prints a c-string to output stream, appending newline. More...
 
size_t println (char c)
 Prints a single character to output stream, appending newline. More...
 
size_t println (double num, int digits=2)
 Print a floating-point number to output stream, appending newline. More...
 
size_t println (const Printable &p)
 Prints a Printable object to output stream, appending newline. More...
 
size_t println (const String &s)
 Prints a String to output stream, appending newline. More...
 
size_t printf (const char *fmt,...) __attribute__((format(printf
 Prints a formatted c-string to output stream. More...
 
Print an integral number to output stream
Parameters
numNumber to print
baseThe base for output (Default: Decimal (base 10))
Return values
size_tQuantity of characters written to stream
size_t print (unsigned long num, int base=DEC)
 
size_t print (const unsigned long long &num, int base=DEC)
 
size_t print (long, int base=DEC)
 
size_t print (const long long &, int base=DEC)
 
size_t print (unsigned int num, int base=DEC)
 
size_t print (unsigned char num, int base=DEC)
 
size_t print (int num, int base=DEC)
 
Print an integral number to output stream, appending newline
Parameters
numNumber to print
baseThe base for output (Default: Decimal (base 10))
Return values
size_tQuantity of characters written to stream
size_t println (unsigned char num, int base=DEC)
 
size_t println (unsigned int num, int base=DEC)
 
size_t println (unsigned long num, int base=DEC)
 
size_t println (const unsigned long long &num, int base=DEC)
 
size_t println (int num, int base=DEC)
 
size_t println (long num, int base=DEC)
 
size_t println (const long long &num, int base=DEC)
 

Protected Member Functions

int timedRead ()
 
int timedPeek ()
 
int peekNextDigit ()
 
long parseInt (char skipChar)
 
float parseFloat (char skipChar)
 
void setWriteError (int err=1)
 

Protected Attributes

StreamTransformerCallback transformCallback = nullptr
 Callback function to perform transformation. More...
 
unsigned long receiveTimeout = 1000
 
unsigned long startMillis = 0
 

Detailed Description

Base64 Stream.

Constructor & Destructor Documentation

◆ Base64OutputStream()

Base64OutputStream::Base64OutputStream ( IDataSourceStream stream,
size_t  resultSize = 500 
)

Stream that transforms bytes of data into base64 data stream.

Parameters
stream- source stream
resultSizeThe size of the intermediate buffer, created once per object and reused multiple times

Member Function Documentation

◆ available()

int StreamTransformer::available ( )
inlineoverridevirtualinherited

Return the total length of the stream.

Return values
int-1 is returned when the size cannot be determined

Reimplemented from IDataSourceStream.

◆ clearWriteError()

void Print::clearWriteError ( )
inlineinherited

Clears the last write error.

◆ find() [1/2]

bool Stream::find ( char *  target)
inherited

◆ find() [2/2]

bool Stream::find ( char *  target,
size_t  length 
)
inherited

◆ findUntil() [1/2]

bool Stream::findUntil ( char *  target,
char *  terminator 
)
inherited

◆ findUntil() [2/2]

bool Stream::findUntil ( char *  target,
size_t  targetLen,
char *  terminate,
size_t  termLen 
)
inherited

◆ flush()

void IDataSourceStream::flush ( )
inlineoverridevirtualinherited

Implements Stream.

Reimplemented in HardwareSerial.

◆ getName()

String StreamTransformer::getName ( ) const
inlineoverridevirtualinherited

Returns name of the resource.

Return values
String
Note
Commonly used to obtain name of file

Reimplemented from IDataSourceStream.

◆ getStreamType()

StreamType StreamTransformer::getStreamType ( ) const
inlineoverridevirtualinherited

Get the stream type.

Return values
StreamTypeThe stream type.

Reimplemented from IDataSourceStream.

◆ getWriteError()

int Print::getWriteError ( )
inlineinherited

Gets last error.

Return values
intError number of last write error

◆ id()

virtual String IDataSourceStream::id ( ) const
inlinevirtualinherited

Returns unique id of the resource.

Return values
Stringthe unique id of the stream.

Reimplemented in FileStream, GdbFileStream, and CircularBuffer.

◆ indexOf()

virtual int Stream::indexOf ( char  c)
inlinevirtualinherited

Reimplemented in HardwareSerial.

◆ isFinished()

bool StreamTransformer::isFinished ( )
overridevirtualinherited

Check if all data has been read.

Return values
boolTrue on success.

Implements IDataSourceStream.

◆ isValid()

virtual bool IDataSourceStream::isValid ( ) const
inlinevirtualinherited

Determine if the stream object contains valid data.

Return values
booltrue if valid, false if invalid
Note
Where inherited classes are initialised by constructor this method indicates whether that was successful or not (e.g. FileStream)

Reimplemented in FileStream, GdbFileStream, and HostFileStream.

◆ length()

int IDataSourceStream::length ( )
inlineinherited

Return the total length of the stream.

Return values
int-1 is returned when the size cannot be determined
Deprecated:
Use available() instead

◆ parseFloat() [1/2]

float Stream::parseFloat ( )
inherited

◆ parseFloat() [2/2]

float Stream::parseFloat ( char  skipChar)
protectedinherited

◆ parseInt() [1/2]

long Stream::parseInt ( )
inherited

◆ parseInt() [2/2]

long Stream::parseInt ( char  skipChar)
protectedinherited

◆ peek()

int IDataSourceStream::peek ( )
overridevirtualinherited

Read a character without advancing the stream pointer.

Return values
intThe character that was read or -1 if none is available

Implements Stream.

Reimplemented in HardwareSerial.

◆ peekNextDigit()

int Stream::peekNextDigit ( )
protectedinherited

◆ print() [1/12]

size_t Print::print ( char  c)
inlineinherited

Prints a single character to output stream.

Parameters
cCharacter to print
Return values
size_tQuantity of characters written to stream

◆ print() [2/12]

size_t Print::print ( const char  str[])
inlineinherited

Prints a c-string to output stream.

Parameters
strc-string to print
Return values
size_tQuantity of characters written to output stream

◆ print() [3/12]

size_t Print::print ( unsigned long  num,
int  base = DEC 
)
inlineinherited

◆ print() [4/12]

size_t Print::print ( const unsigned long long &  num,
int  base = DEC 
)
inlineinherited

◆ print() [5/12]

size_t Print::print ( long  ,
int  base = DEC 
)
inherited

◆ print() [6/12]

size_t Print::print ( const long long &  ,
int  base = DEC 
)
inherited

◆ print() [7/12]

size_t Print::print ( unsigned int  num,
int  base = DEC 
)
inlineinherited

◆ print() [8/12]

size_t Print::print ( unsigned char  num,
int  base = DEC 
)
inlineinherited

◆ print() [9/12]

size_t Print::print ( int  num,
int  base = DEC 
)
inlineinherited

◆ print() [10/12]

size_t Print::print ( double  num,
int  digits = 2 
)
inlineinherited

Print a floating-point number to output stream.

Parameters
numNumber to print
digitsThe decimal places to print (Default: 2, e.g. 21.35)
Return values
size_tQuantity of characters written to stream

◆ print() [11/12]

size_t Print::print ( const Printable p)
inlineinherited

Prints a Printable object to output stream.

Parameters
pObject to print
Return values
size_tQuantity of characters written to stream

◆ print() [12/12]

size_t Print::print ( const String s)
inlineinherited

Prints a String to output stream.

Parameters
sString to print
Return values
size_tQuantity of characters written to stream

◆ printf()

size_t Print::printf ( const char *  fmt,
  ... 
)
inherited

Prints a formatted c-string to output stream.

Parameters
fmtPointer to formated c-string to print
...Parameters for placeholders within formated string
Return values
size_tQuantity of characters written to stream
Note
Use standard printf placeholders, e.g. d for integer, s for c-string, etc.

◆ println() [1/13]

size_t Print::println ( )
inlineinherited

Prints a newline to output stream.

Return values
size_tQuantity of characters written to stream

◆ println() [2/13]

size_t Print::println ( const char  str[])
inlineinherited

Prints a c-string to output stream, appending newline.

Parameters
strc-string to print
Return values
size_tQuantity of characters written to stream

◆ println() [3/13]

size_t Print::println ( char  c)
inlineinherited

Prints a single character to output stream, appending newline.

Parameters
cCharacter to print
Return values
size_tQuantity of characters written to stream

◆ println() [4/13]

size_t Print::println ( unsigned char  num,
int  base = DEC 
)
inlineinherited

◆ println() [5/13]

size_t Print::println ( unsigned int  num,
int  base = DEC 
)
inlineinherited

◆ println() [6/13]

size_t Print::println ( unsigned long  num,
int  base = DEC 
)
inlineinherited

◆ println() [7/13]

size_t Print::println ( const unsigned long long &  num,
int  base = DEC 
)
inlineinherited

◆ println() [8/13]

size_t Print::println ( int  num,
int  base = DEC 
)
inlineinherited

◆ println() [9/13]

size_t Print::println ( long  num,
int  base = DEC 
)
inlineinherited

◆ println() [10/13]

size_t Print::println ( const long long &  num,
int  base = DEC 
)
inlineinherited

◆ println() [11/13]

size_t Print::println ( double  num,
int  digits = 2 
)
inlineinherited

Print a floating-point number to output stream, appending newline.

Parameters
numNumber to print
digitsThe decimal places to print (Default: 2, e.g. 21.35)
Return values
size_tQuantity of characters written to stream

◆ println() [12/13]

size_t Print::println ( const Printable p)
inlineinherited

Prints a Printable object to output stream, appending newline.

Parameters
pObject to print
Return values
size_tQuantity of characters written to stream

◆ println() [13/13]

size_t Print::println ( const String s)
inlineinherited

Prints a String to output stream, appending newline.

Parameters
sString to print
Return values
size_tQuantity of characters written to stream

◆ read()

int IDataSourceStream::read ( )
overridevirtualinherited

Read one character and moves the stream pointer.

Return values
Thecharacter that was read or -1 if none is available

Implements Stream.

Reimplemented in HardwareSerial.

◆ readBytes()

size_t Stream::readBytes ( char *  buffer,
size_t  length 
)
inherited

◆ readBytesUntil()

size_t Stream::readBytesUntil ( char  terminator,
char *  buffer,
size_t  length 
)
inherited

◆ readMemoryBlock()

uint16_t StreamTransformer::readMemoryBlock ( char *  data,
int  bufSize 
)
overridevirtualinherited

Read a block of memory.

Parameters
dataPointer to the data to be read
bufSizeQuantity of chars to read
Return values
uint16_tQuantity of chars read
Todo:
Should IDataSourceStream::readMemoryBlock return same data type as its bufSize param?

Implements IDataSourceStream.

◆ readString() [1/2]

String Stream::readString ( )
inherited

◆ readString() [2/2]

String IDataSourceStream::readString ( size_t  maxLen = UINT16_MAX)
inherited

Overrides Stream method for more efficient reading.

Note
Content is read using readMemoryBlock() so read position (for seekable streams) is not changed

◆ readStringUntil()

String Stream::readStringUntil ( char  terminator)
inherited

◆ restoreState()

void Base64OutputStream::restoreState ( )
overridevirtual

A method that restores the last backed up state.

Reimplemented from StreamTransformer.

◆ saveState()

void Base64OutputStream::saveState ( )
overridevirtual

A method that backs up the current state.

Reimplemented from StreamTransformer.

◆ seek()

bool StreamTransformer::seek ( int  len)
overridevirtualinherited

Move read cursor.

Parameters
lenRelative cursor adjustment
Return values
boolTrue on success.

Reimplemented from IDataSourceStream.

◆ seekFrom()

virtual int IDataSourceStream::seekFrom ( int  offset,
unsigned  origin 
)
inlinevirtualinherited

Change position in stream.

Parameters
offset
originSEEK_SET, SEEK_CUR, SEEK_END
Return values
Newposition, < 0 on error
Note
This method is implemented by streams which support random seeking, such as files and memory streams.

Reimplemented in FileStream, MemoryDataStream, HostFileStream, FSTR::Stream, and GdbFileStream.

◆ setTimeout()

void Stream::setTimeout ( unsigned long  timeout)
inherited

◆ setWriteError()

void Print::setWriteError ( int  err = 1)
inlineprotectedinherited

◆ timedPeek()

int Stream::timedPeek ( )
protectedinherited

◆ timedRead()

int Stream::timedRead ( )
protectedinherited

◆ transform()

size_t Base64OutputStream::transform ( const uint8_t *  in,
size_t  inLength,
uint8_t *  out,
size_t  outLength 
)
overridevirtual

Inherited class implements this method to transform a block of data.

Parameters
insource data
inLengthsource data length
outoutput buffer
outLengthsize of output buffer
Return values
size_tnumber of output bytes written
Note
Called with in = nullptr and inLength = 0 at end of input stream

Reimplemented from StreamTransformer.

◆ write() [1/4]

size_t Print::write ( const char *  str)
inlineinherited

Writes a c-string to output stream.

Parameters
strPointer to c-string
Return values
size_tQuantity of characters written to stream

◆ write() [2/4]

virtual size_t Print::write ( const uint8_t *  buffer,
size_t  size 
)
virtualinherited

Writes characters from a buffer to output stream.

Parameters
bufferPointer to character buffer
sizeQuantity of characters to write
Return values
size_tQuantity of characters written to stream

Reimplemented in HardwareSerial, CircularBuffer, OtaUpgrade::BasicStream, FileStream, MemoryDataStream, HostFileStream, LimitedMemoryStream, TwoWire, GdbFileStream, EndlessMemoryStream, ReadWriteStream, and OtaUpgrade::EncryptedStream.

◆ write() [3/4]

size_t Print::write ( const char *  buffer,
size_t  size 
)
inlineinherited

Writes characters from a buffer to output stream.

Parameters
bufferPointer to character buffer
sizeQuantity of characters to write
Return values
size_tQuantity of characters written to stream

◆ write() [4/4]

size_t IDataSourceStream::write ( uint8_t  charToWrite)
inlineoverridevirtualinherited

From Stream class: We don't write using this stream.

Parameters
charToWrite

Implements Print.

Reimplemented in ReadWriteStream.

Member Data Documentation

◆ receiveTimeout

unsigned long Stream::receiveTimeout = 1000
protectedinherited

◆ startMillis

unsigned long Stream::startMillis = 0
protectedinherited

◆ transformCallback

StreamTransformerCallback StreamTransformer::transformCallback = nullptr
protectedinherited

Callback function to perform transformation.

Deprecated:
Create inherited class and override transform() method instead

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