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juce::FileInputStream Class Reference

#include <juce_core.h>

Inheritance diagram for juce::FileInputStream:
juce::InputStream

Public Member Functions

 FileInputStream (const File &fileToRead)
 
 ~FileInputStream ()
 
const FilegetFile () const noexcept
 
const ResultgetStatus () const noexcept
 
bool failedToOpen () const noexcept
 
bool openedOk () const noexcept
 
int64 getTotalLength () override
 
int read (void *, int) override
 
bool isExhausted () override
 
int64 getPosition () override
 
bool setPosition (int64) 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)
 

Additional Inherited Members

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

Detailed Description

An input stream that reads from a local file.

See also
InputStream, FileOutputStream, File::createInputStream

Constructor & Destructor Documentation

◆ FileInputStream()

FileInputStream::FileInputStream ( const File fileToRead)
explicit

Creates a FileInputStream to read from the given file.

After creating a FileInputStream, you should use openedOk() or failedToOpen() to make sure that it's OK before trying to read from it! If it failed, you can call getStatus() to get more error information.

◆ ~FileInputStream()

FileInputStream::~FileInputStream ( )

Destructor.

Member Function Documentation

◆ failedToOpen()

bool juce::FileInputStream::failedToOpen ( ) const
inlinenoexcept

Returns true if the stream couldn't be opened for some reason.

See also
getResult()

◆ getFile()

const File& juce::FileInputStream::getFile ( ) const
inlinenoexcept

Returns the file that this stream is reading from.

◆ getPosition()

int64 FileInputStream::getPosition ( )
overridevirtual

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

See also
setPosition

Implements juce::InputStream.

◆ getStatus()

const Result& juce::FileInputStream::getStatus ( ) const
inlinenoexcept

Returns the status of the file stream. The result will be ok if the file opened successfully. If an error occurs while opening or reading from the file, this will contain an error message.

◆ getTotalLength()

int64 FileInputStream::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.

◆ isExhausted()

bool FileInputStream::isExhausted ( )
overridevirtual

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

Implements juce::InputStream.

◆ openedOk()

bool juce::FileInputStream::openedOk ( ) const
inlinenoexcept

Returns true if the stream opened without problems.

See also
getResult()

◆ read()

int FileInputStream::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.

◆ setPosition()

bool FileInputStream::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.


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