MCore::DiskFile Class Reference

#include <DiskFile.h>

Inherits MCore::File.

Public Types
enum	{ TYPE_ID = 0x0000001 }
enum	EMode {   READ = 0 , WRITE = 1 , READWRITE = 2 , READWRITECREATE = 3 ,   APPEND = 4 , READWRITEAPPEND = 5 }

Public Member Functions
	DiskFile ()
virtual	~DiskFile ()
uint32	GetType () const override
virtual bool	Open (const char *fileName, EMode mode)
void	Close () override
void	Flush () override
bool	GetIsEOF () const override
uint8	GetNextByte () override
size_t	GetPos () const override
bool	WriteByte (uint8 value) override
bool	Forward (size_t numBytes) override
bool	Seek (size_t offset) override
size_t	Write (const void *data, size_t length) override
size_t	Read (void *data, size_t length) override
bool	GetIsOpen () const override
size_t	GetFileSize () const override
EMode	GetFileMode () const
const AZStd::string &	GetFileName () const
Public Member Functions inherited from MCore::File
	File ()
virtual	~File ()
Public Member Functions inherited from MCore::Stream
	Stream ()
virtual	~Stream ()
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)

Protected Attributes
AZStd::string	m_fileName
FILE *	m_file
EMode	m_fileMode

Detailed Description

A standard file as we normally think of. In other words, a file stored on the harddisk or a CD or any other comparable medium. This is for binary files only. If you plan to read text files, please use the MCore::DiskTextFile class.

Member Enumeration Documentation

EMode

enum MCore::DiskFile::EMode

File opening modes. Do not use a combination of these modes. Just pick one.

Enumerator
READ	open for reading, if the file doesn't exist the Open method will fail.
WRITE	open for writing, if the file already exists it will be overwritten.
READWRITE	opens the file for both reading and writing, the file must already exist else the Open method will fail.
READWRITECREATE	opens the file for both reading and writing, if the file exists already it will be overwritten.
APPEND	opens for writing at the end of the file, will create a new file if it doesn't yet exist.
READWRITEAPPEND	opens for reading and appending (writing), creates the file when it doesn't exist.

Constructor & Destructor Documentation

DiskFile()

MCore::DiskFile::DiskFile

(

)

The constructor.

~DiskFile()

virtual MCore::DiskFile::~DiskFile ( )

virtual

The destructor. Automatically closes the file.

Member Function Documentation

Close()

void MCore::DiskFile::Close ( )

overridevirtual

Close the file.

Implements MCore::File.

Flush()

void MCore::DiskFile::Flush ( )

overridevirtual

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

Implements MCore::File.

Forward()

bool MCore::DiskFile::Forward ( size_t  numBytes )

overridevirtual

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).

Implements MCore::File.

GetFileMode()

EMode MCore::DiskFile::GetFileMode

(

)

const

Returns the mode the file has been opened with.

Returns

The mode the file has been opened with. See enum EMode.

GetFileName()

const AZStd::string & MCore::DiskFile::GetFileName

(

)

const

Returns the name of the file as it has been opened.

Returns

The string containing the filename as it has been passed to the method Open.

GetFileSize()

size_t MCore::DiskFile::GetFileSize ( ) const

overridevirtual

Returns the size of this file in bytes.

Returns

The filesize in bytes.

Implements MCore::File.

GetIsEOF()

bool MCore::DiskFile::GetIsEOF ( ) const

overridevirtual

Returns true if we reached the end of this file, otherwise false is returned.

Implements MCore::File.

GetIsOpen()

bool MCore::DiskFile::GetIsOpen ( ) const

overridevirtual

Check if the file has been opened already.

Returns

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

Implements MCore::File.

GetNextByte()

uint8 MCore::DiskFile::GetNextByte ( )

overridevirtual

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.

Implements MCore::File.

GetPos()

size_t MCore::DiskFile::GetPos ( ) const

overridevirtual

Returns the position in the file.

Returns

The offset in the file in bytes.

Implements MCore::File.

GetType()

uint32 MCore::DiskFile::GetType ( ) const

overridevirtual

Get the unique type ID.

Returns

The type identification number.

Implements MCore::Stream.

Open()

virtual bool MCore::DiskFile::Open ( const char *  fileName, EMode  mode  )

virtual

Try to open the file, given a filename and open mode. The file is always opened in binary mode. If you want to load text files, use MCore::DiskTextFile.

Parameters

fileName	The filename on disk.
mode	The file open mode. See enum EMode for more information. Do NOT use a combination of these modes.

Returns

Returns true when successfully opened the file, otherwise false is returned.

Read()

size_t MCore::DiskFile::Read ( void *  data, size_t  length  )

overridevirtual

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 bytes read.

Implements MCore::File.

Seek()

bool MCore::DiskFile::Seek ( size_t  offset )

overridevirtual

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.

Implements MCore::File.

Write()

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

overridevirtual

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.

Implements MCore::File.

WriteByte()

bool MCore::DiskFile::WriteByte ( uint8  value )

overridevirtual

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.

Implements MCore::File.

Member Data Documentation

m_file

FILE* MCore::DiskFile::m_file

protected

The file handle.

m_fileMode

EMode MCore::DiskFile::m_fileMode

protected

The mode we opened the file with.

m_fileName

AZStd::string MCore::DiskFile::m_fileName

protected

The filename

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

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