juce::OutputStream Class Reference

The base class for streams that write data to some kind of destination. More...

#include <juce_OutputStream.h>

Inheritance diagram for juce::OutputStream:

Collaboration diagram for juce::OutputStream:

Public Member Functions
virtual	~OutputStream ()
	Destructor. More...
virtual void	flush ()=0
	If the stream is using a buffer, this will ensure it gets written out to the destination. More...
const String &	getNewLineString () const noexcept
	Returns the current new-line string that was set by setNewLineString(). More...
virtual int64	getPosition ()=0
	Returns the stream's current position. More...
void	setNewLineString (const String &newLineString)
	Sets the string to write to the stream when a new line is written. More...
virtual bool	setPosition (int64 newPosition)=0
	Tries to move the stream's output position. More...
virtual bool	write (const void *dataToWrite, size_t numberOfBytes)=0
	Writes a block of data to the stream. More...
virtual bool	writeBool (bool boolValue)
	Writes a boolean to the stream as a single byte. More...
virtual bool	writeByte (char byte)
	Writes a single byte to the stream. More...
virtual bool	writeCompressedInt (int value)
	Writes a condensed binary encoding of a 32-bit integer. More...
virtual bool	writeDouble (double value)
	Writes a 64-bit floating point value to the stream in a binary format. More...
virtual bool	writeDoubleBigEndian (double value)
	Writes a 64-bit floating point value to the stream in a binary format. More...
virtual bool	writeFloat (float value)
	Writes a 32-bit floating point value to the stream in a binary format. More...
virtual bool	writeFloatBigEndian (float value)
	Writes a 32-bit floating point value to the stream in a binary format. More...
virtual int64	writeFromInputStream (InputStream &source, int64 maxNumBytesToWrite)
	Reads data from an input stream and writes it to this stream. More...
virtual bool	writeInt (int value)
	Writes a 32-bit integer to the stream in a little-endian byte order. More...
virtual bool	writeInt64 (int64 value)
	Writes a 64-bit integer to the stream in a little-endian byte order. More...
virtual bool	writeInt64BigEndian (int64 value)
	Writes a 64-bit integer to the stream in a big-endian byte order. More...
virtual bool	writeIntBigEndian (int value)
	Writes a 32-bit integer to the stream in a big-endian byte order. More...
virtual bool	writeRepeatedByte (uint8 byte, size_t numTimesToRepeat)
	Writes a byte to the output stream a given number of times. More...
virtual bool	writeShort (short value)
	Writes a 16-bit integer to the stream in a little-endian byte order. More...
virtual bool	writeShortBigEndian (short value)
	Writes a 16-bit integer to the stream in a big-endian byte order. More...
virtual bool	writeString (const String &text)
	Stores a string in the stream in a binary format. More...
virtual bool	writeText (const String &text, bool asUTF16, bool writeUTF16ByteOrderMark, const char *lineEndings)
	Writes a string of text to the stream. More...

Protected Member Functions
	OutputStream ()

Private Attributes
String	newLineString

Detailed Description

The base class for streams that write data to some kind of destination.

Input and output streams are used throughout the library - subclasses can override some or all of the virtual functions to implement their behaviour.

See also

InputStream, MemoryOutputStream, FileOutputStream

@tags{Core}

Constructor & Destructor Documentation

OutputStream()

juce::OutputStream::OutputStream ( )

protected

~OutputStream()

virtual juce::OutputStream::~OutputStream ( )

virtual

Destructor.

Some subclasses might want to do things like call flush() during their destructors.

Member Function Documentation

flush()

virtual void juce::OutputStream::flush ( )

pure virtual

If the stream is using a buffer, this will ensure it gets written out to the destination.

Implemented in juce::MemoryOutputStream, juce::FileOutputStream, and juce::GZIPCompressorOutputStream.

getNewLineString()

const String& juce::OutputStream::getNewLineString ( ) const

inlinenoexcept

Returns the current new-line string that was set by setNewLineString().

getPosition()

virtual int64 juce::OutputStream::getPosition ( )

pure virtual

Returns the stream's current position.

See also

setPosition

Implemented in juce::MemoryOutputStream, juce::FileOutputStream, and juce::GZIPCompressorOutputStream.

setNewLineString()

void juce::OutputStream::setNewLineString

(

const String &

newLineString

)

Sets the string to write to the stream when a new line is written.

By default this will be set the value of NewLine::getDefault().

setPosition()

virtual bool juce::OutputStream::setPosition ( int64  newPosition )

pure virtual

Tries to move the stream's output position.

Not all streams will be able to seek to a new position - this will return false if it fails to work.

See also

getPosition

Implemented in juce::MemoryOutputStream, juce::FileOutputStream, and juce::GZIPCompressorOutputStream.

write()

virtual bool juce::OutputStream::write ( const void *  dataToWrite, size_t  numberOfBytes  )

pure virtual

Writes a block of data to the stream.

When creating a subclass of OutputStream, this is the only write method that needs to be overloaded - the base class has methods for writing other types of data which use this to do the work.

Parameters

dataToWrite	the target buffer to receive the data. This must not be null.
numberOfBytes	the number of bytes to write.

Returns

false if the write operation fails for some reason

Implemented in juce::MemoryOutputStream, juce::FileOutputStream, and juce::GZIPCompressorOutputStream.

writeBool()

virtual bool juce::OutputStream::writeBool ( bool  boolValue )

virtual

Writes a boolean to the stream as a single byte.

This is encoded as a binary byte (not as text) with a value of 1 or 0.

Returns

false if the write operation fails for some reason

See also

InputStream::readBool

writeByte()

virtual bool juce::OutputStream::writeByte ( char  byte )

virtual

Writes a single byte to the stream.

Returns

false if the write operation fails for some reason

See also

InputStream::readByte

writeCompressedInt()

virtual bool juce::OutputStream::writeCompressedInt ( int  value )

virtual

Writes a condensed binary encoding of a 32-bit integer.

If you're storing a lot of integers which are unlikely to have very large values, this can save a lot of space, because values under 0xff will only take up 2 bytes, under 0xffff only 3 bytes, etc.

The format used is: number of significant bytes + up to 4 bytes in little-endian order.

Returns

false if the write operation fails for some reason

See also

InputStream::readCompressedInt

writeDouble()

virtual bool juce::OutputStream::writeDouble ( double  value )

virtual

Writes a 64-bit floating point value to the stream in a binary format.

The eight raw bytes of the double value are written out as a little-endian 64-bit int.

Returns

false if the write operation fails for some reason

See also

InputStream::readDouble

writeDoubleBigEndian()

virtual bool juce::OutputStream::writeDoubleBigEndian ( double  value )

virtual

Writes a 64-bit floating point value to the stream in a binary format.

The eight raw bytes of the double value are written out as a big-endian 64-bit int.

See also

InputStream::readDoubleBigEndian

Returns

false if the write operation fails for some reason

writeFloat()

virtual bool juce::OutputStream::writeFloat ( float  value )

virtual

Writes a 32-bit floating point value to the stream in a binary format.

The binary 32-bit encoding of the float is written as a little-endian int.

Returns

false if the write operation fails for some reason

See also

InputStream::readFloat

writeFloatBigEndian()

virtual bool juce::OutputStream::writeFloatBigEndian ( float  value )

virtual

Writes a 32-bit floating point value to the stream in a binary format.

The binary 32-bit encoding of the float is written as a big-endian int.

Returns

false if the write operation fails for some reason

See also

InputStream::readFloatBigEndian

writeFromInputStream()

virtual int64 juce::OutputStream::writeFromInputStream ( InputStream &  source, int64  maxNumBytesToWrite  )

virtual

Reads data from an input stream and writes it to this stream.

Parameters

source	the stream to read from
maxNumBytesToWrite	the number of bytes to read from the stream (if this is less than zero, it will keep reading until the input is exhausted)

Returns

the number of bytes written

Reimplemented in juce::MemoryOutputStream.

writeInt()

virtual bool juce::OutputStream::writeInt ( int  value )

virtual

Writes a 32-bit integer to the stream in a little-endian byte order.

Returns

false if the write operation fails for some reason

See also

InputStream::readInt

writeInt64()

virtual bool juce::OutputStream::writeInt64 ( int64  value )

virtual

Writes a 64-bit integer to the stream in a little-endian byte order.

Returns

false if the write operation fails for some reason

See also

InputStream::readInt64

writeInt64BigEndian()

virtual bool juce::OutputStream::writeInt64BigEndian ( int64  value )

virtual

Writes a 64-bit integer to the stream in a big-endian byte order.

Returns

false if the write operation fails for some reason

See also

InputStream::readInt64BigEndian

writeIntBigEndian()

virtual bool juce::OutputStream::writeIntBigEndian ( int  value )

virtual

Writes a 32-bit integer to the stream in a big-endian byte order.

Returns

false if the write operation fails for some reason

See also

InputStream::readIntBigEndian

writeRepeatedByte()

virtual bool juce::OutputStream::writeRepeatedByte ( uint8  byte, size_t  numTimesToRepeat  )

virtual

Writes a byte to the output stream a given number of times.

Returns

false if the write operation fails for some reason

Reimplemented in juce::MemoryOutputStream, and juce::FileOutputStream.

writeShort()

virtual bool juce::OutputStream::writeShort ( short  value )

virtual

Writes a 16-bit integer to the stream in a little-endian byte order.

This will write two bytes to the stream: (value & 0xff), then (value >> 8).

Returns

false if the write operation fails for some reason

See also

InputStream::readShort

writeShortBigEndian()

virtual bool juce::OutputStream::writeShortBigEndian ( short  value )

virtual

Writes a 16-bit integer to the stream in a big-endian byte order.

This will write two bytes to the stream: (value >> 8), then (value & 0xff).

Returns

false if the write operation fails for some reason

See also

InputStream::readShortBigEndian

writeString()

virtual bool juce::OutputStream::writeString ( const String &  text )

virtual

Stores a string in the stream in a binary format.

This isn't the method to use if you're trying to append text to the end of a text-file! It's intended for storing a string so that it can be retrieved later by InputStream::readString().

It writes the string to the stream as UTF8, including the null termination character.

For appending text to a file, instead use writeText, or operator<<

Returns

false if the write operation fails for some reason

See also

InputStream::readString, writeText, operator<<

writeText()

virtual bool juce::OutputStream::writeText ( const String &  text, bool  asUTF16, bool  writeUTF16ByteOrderMark, const char *  lineEndings  )

virtual

Writes a string of text to the stream.

It can either write the text as UTF-8 or UTF-16, and can also add the UTF-16 byte-order-mark bytes (0xff, 0xfe) to indicate the endianness (these should only be used at the start of a file).

If lineEndings is nullptr, then line endings in the text won't be modified. If you pass "\\n" or "\\r\\n" then this function will replace any existing line feeds.

Returns

false if the write operation fails for some reason

Member Data Documentation

newLineString

String juce::OutputStream::newLineString

private

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

• juce_OutputStream.h