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juce::GZIPDecompressorInputStream Class Reference

#include <juce_core.h>

Inheritance diagram for juce::GZIPDecompressorInputStream:
juce::InputStream

Classes

class  GZIPDecompressHelper
 

Public Types

enum  Format { zlibFormat = 0, deflateFormat, gzipFormat }
 

Public Member Functions

 GZIPDecompressorInputStream (InputStream *sourceStream, bool deleteSourceWhenDestroyed, Format sourceFormat=zlibFormat, int64 uncompressedStreamLength=-1)
 
 GZIPDecompressorInputStream (InputStream &sourceStream)
 
 ~GZIPDecompressorInputStream ()
 
int64 getPosition () override
 
bool setPosition (int64 pos) override
 
int64 getTotalLength () override
 
bool isExhausted () override
 
int read (void *destBuffer, int maxBytesToRead) override
 
- Public Member Functions inherited from juce::InputStream
virtual ~InputStream ()
 
int64 getNumBytesRemaining ()
 
virtual char readByte ()
 
virtual bool readBool ()
 
virtual short readShort ()
 
virtual short readShortBigEndian ()
 
virtual int readInt ()
 
virtual int readIntBigEndian ()
 
virtual int64 readInt64 ()
 
virtual int64 readInt64BigEndian ()
 
virtual float readFloat ()
 
virtual float readFloatBigEndian ()
 
virtual double readDouble ()
 
virtual double readDoubleBigEndian ()
 
virtual int readCompressedInt ()
 
virtual String readNextLine ()
 
virtual String readString ()
 
virtual String readEntireStreamAsString ()
 
virtual size_t readIntoMemoryBlock (MemoryBlock &destBlock, ssize_t maxNumBytesToRead=-1)
 
virtual void skipNextBytes (int64 numBytesToSkip)
 

Friends

struct ContainerDeletePolicy< GZIPDecompressHelper >
 

Additional Inherited Members

- Protected Member Functions inherited from juce::InputStream
 InputStream () noexcept
 

Detailed Description

This stream will decompress a source-stream using zlib.

Tip: if you're reading lots of small items from one of these streams, you can increase the performance enormously by passing it through a BufferedInputStream, so that it has to read larger blocks less often.

See also
GZIPCompressorOutputStream

Member Enumeration Documentation

Enumerator
zlibFormat 
deflateFormat 
gzipFormat 

Constructor & Destructor Documentation

GZIPDecompressorInputStream::GZIPDecompressorInputStream ( InputStream sourceStream,
bool  deleteSourceWhenDestroyed,
Format  sourceFormat = zlibFormat,
int64  uncompressedStreamLength = -1 
)

Creates a decompressor stream.

Parameters
sourceStreamthe stream to read from
deleteSourceWhenDestroyedwhether or not to delete the source stream when this object is destroyed
sourceFormatcan be used to select which of the supported formats the data is expected to be in
uncompressedStreamLengthif the creator knows the length that the uncompressed stream will be, then it can supply this value, which will be returned by getTotalLength()
GZIPDecompressorInputStream::GZIPDecompressorInputStream ( InputStream sourceStream)

Creates a decompressor stream.

Parameters
sourceStreamthe stream to read from - the source stream must not be deleted until this object has been destroyed
GZIPDecompressorInputStream::~GZIPDecompressorInputStream ( )

Destructor.

Member Function Documentation

int64 GZIPDecompressorInputStream::getPosition ( )
overridevirtual

Returns the offset of the next byte that will be read from the stream.

See also
setPosition

Implements juce::InputStream.

int64 GZIPDecompressorInputStream::getTotalLength ( )
overridevirtual

Returns the total number of bytes available for reading in this stream.

Note that this is the number of bytes available from the start of the stream, not from the current position.

If the size of the stream isn't actually known, this will return -1.

See also
getNumBytesRemaining

Implements juce::InputStream.

bool GZIPDecompressorInputStream::isExhausted ( )
overridevirtual

Returns true if the stream has no more data to read.

Implements juce::InputStream.

int GZIPDecompressorInputStream::read ( void *  destBuffer,
int  maxBytesToRead 
)
overridevirtual

Reads some data from the stream into a memory buffer.

This is the only read method that subclasses actually need to implement, as the InputStream base class implements the other read methods in terms of this one (although it's often more efficient for subclasses to implement them directly).

Parameters
destBufferthe destination buffer for the data. This must not be null.
maxBytesToReadthe maximum number of bytes to read - make sure the memory block passed in is big enough to contain this many bytes. This value must not be negative.
Returns
the actual number of bytes that were read, which may be less than maxBytesToRead if the stream is exhausted before it gets that far

Implements juce::InputStream.

bool GZIPDecompressorInputStream::setPosition ( int64  newPosition)
overridevirtual

Tries to move the current read position of the stream.

The position is an absolute number of bytes from the stream's start.

Some streams might not be able to do this, in which case they should do nothing and return false. Others might be able to manage it by resetting themselves and skipping to the correct position, although this is obviously a bit slow.

Returns
true if the stream manages to reposition itself correctly
See also
getPosition

Implements juce::InputStream.

Friends And Related Function Documentation


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