MCore::File Class Reference

#include <File.h>

Inherits MCore::Stream.

Inherited by MCore::DiskFile, and MCore::MemoryFile.

Public Member Functions
	File ()
virtual	~File ()
virtual void	Close ()=0
virtual void	Flush ()=0
virtual bool	GetIsEOF () const =0
virtual uint8	GetNextByte ()=0
virtual size_t	GetPos () const =0
virtual size_t	GetFileSize () const =0
virtual bool	WriteByte (uint8 value)=0
virtual bool	Forward (size_t numBytes)=0
virtual bool	Seek (size_t offset)=0
virtual size_t	Read (void *data, size_t length)=0
virtual size_t	Write (const void *data, size_t length)=0
virtual bool	GetIsOpen () const =0
Public Member Functions inherited from MCore::Stream
	Stream ()
virtual	~Stream ()
virtual uint32	GetType () const =0
virtual Stream &	operator<< (bool b)
virtual Stream &	operator<< (char ch)
virtual Stream &	operator<< (uint8 ch)
virtual Stream &	operator<< (int16 number)
virtual Stream &	operator<< (uint16 number)
virtual Stream &	operator<< (int32 number)
virtual Stream &	operator<< (uint32 number)
virtual Stream &	operator<< (uint64 number)
virtual Stream &	operator<< (int64 number)
virtual Stream &	operator<< (float number)
virtual Stream &	operator<< (double number)
virtual Stream &	operator<< (AZStd::string &text)
virtual Stream &	operator<< (const char *text)
virtual Stream &	operator>> (bool &b)
virtual Stream &	operator>> (char &ch)
virtual Stream &	operator>> (uint8 &ch)
virtual Stream &	operator>> (int16 &number)
virtual Stream &	operator>> (uint16 &number)
virtual Stream &	operator>> (int32 &number)
virtual Stream &	operator>> (uint32 &number)
virtual Stream &	operator>> (int64 &number)
virtual Stream &	operator>> (uint64 &number)
virtual Stream &	operator>> (float &number)
virtual Stream &	operator>> (double &number)
virtual Stream &	operator>> (AZStd::string &text)

Detailed Description

The file abstract base class. This class represents some file from which the user can read, write, etc. Do not just think of this as only a file on disk. A file could be virtually anything from which can be read and to which can be written. Like a stream, but with more functionalities. For example the file could also be a specified section in your systems main memory. Another example could be the file being some sort of network stream.

Constructor & Destructor Documentation

File()

MCore::File::File ( )

inline

The constructor.

~File()

virtual MCore::File::~File ( )

inlinevirtual

The destructor.

Member Function Documentation

Close()

virtual void MCore::File::Close ( )

pure virtual

Close the file.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

Flush()

virtual void MCore::File::Flush ( )

pure virtual

Flush the file. All cached (not yet written) data will be forced to written when calling this method.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

Forward()

virtual bool MCore::File::Forward ( size_t  numBytes )

pure virtual

Seek ahead a given number of bytes. This can be used to skip a given number of upcoming bytes in the file.

Parameters

numBytes

The number of bytes to seek ahead.

Returns

Returns true when succeeded or false when an error occured (for example when we where trying to read past the end of the file).

Implemented in MCore::MemoryFile, and MCore::DiskFile.

GetFileSize()

virtual size_t MCore::File::GetFileSize ( ) const

pure virtual

Returns the size of this file in bytes.

Returns

The filesize in bytes.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

GetIsEOF()

virtual bool MCore::File::GetIsEOF ( ) const

pure virtual

Check if we reached the end of the file or not.

Returns

Returns true when we have returned the end of the file. Otherwise false is returned.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

GetIsOpen()

virtual bool MCore::File::GetIsOpen ( ) const

pure virtual

Check if the file has been opened already.

Returns

Returns true when the file has been opened, otherwise false.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

GetNextByte()

virtual uint8 MCore::File::GetNextByte ( )

pure virtual

Reads and returns the next byte/character in the file. So this will increase the position in the file with one.

Returns

The character or byte read.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

GetPos()

virtual size_t MCore::File::GetPos ( ) const

pure virtual

Returns the position in the file.

Returns

The offset in the file in bytes.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

Read()

virtual size_t MCore::File::Read ( void *  data, size_t  length  )

pure virtual

Read a given amount of data from the file.

Parameters

data	The pointer where to store the read data.
length	The size in bytes of the data to read.

Returns

Returns the number of read bytes.

Reimplemented from MCore::Stream.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

Seek()

virtual bool MCore::File::Seek ( size_t  offset )

pure virtual

Seek to a given byte position in the file, where 0 would be the beginning of the file. So we're talking about the absolute position in the file. After successfully executing this method the method GetPos will return the given offset.

Parameters

offset

The offset in bytes (the position) in the file to seek to.

Returns

Returns true when successfully moved to the given position in the file, otherwise false.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

Write()

virtual size_t MCore::File::Write ( const void *  data, size_t  length  )

pure virtual

Writes a given amount of data to the file.

Parameters

data	The pointer to the data to write.
length	The size in bytes of the data to write.

Returns

Returns the number of written bytes.

Reimplemented from MCore::Stream.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

WriteByte()

virtual bool MCore::File::WriteByte ( uint8  value )

pure virtual

Write a character or byte in the file.

Parameters

value

The character or byte to write.

Returns

Returns true when successfully written, otherwise false is returned.

Implemented in MCore::MemoryFile, and MCore::DiskFile.

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

• Gems/EMotionFX/Code/MCore/Source/File.h