#include <memstream.h>

Inheritance diagram for Common::MemorySeekableReadWriteStream:

Public Member Functions
	MemorySeekableReadWriteStream (byte *buf, uint32 len, DisposeAfterUse::Flag disposeMemory=DisposeAfterUse::NO)

uint32	write (const void *dataPtr, uint32 dataSize) override

int64	pos () const override

int64	size () const override

bool	eos () const override

bool	err () const override

void	clearErr () override

void	rewind (int32 bytes)

byte	peekByte ()

uint32	read (void *dataPtr, uint32 dataSize) override

bool	seek (int64 offset, int whence=SEEK_SET) override

Public Member Functions inherited from Common::SeekableReadStream
virtual bool	skip (uint32 offset)

virtual char *	readLine (char *s, size_t bufSize, bool handleCR=true)

virtual String	readLine (bool handleCR=true)

void	hexdump (int len, int bytesPerLine=16, int startOffset=0)

Public Member Functions inherited from Common::ReadStream
byte	readByte ()

FORCEINLINE int8	readSByte ()

uint16	readUint16LE ()

uint32	readUint32LE ()

uint64	readUint64LE ()

uint16	readUint16BE ()

uint32	readUint32BE ()

uint64	readUint64BE ()

FORCEINLINE int16	readSint16LE ()

FORCEINLINE int32	readSint32LE ()

FORCEINLINE int64	readSint64LE ()

FORCEINLINE int16	readSint16BE ()

FORCEINLINE int32	readSint32BE ()

FORCEINLINE int64	readSint64BE ()

FORCEINLINE float	readFloatLE ()

FORCEINLINE float	readFloatBE ()

FORCEINLINE double	readDoubleLE ()

FORCEINLINE double	readDoubleBE ()

template<class TDataFormat , class... T>
bool	readMultiple (const TDataFormat &dataFormat, T &...values)

template<class... T>
bool	readMultipleEndian (bool isLittle, T &...values)

template<class... T>
bool	readMultipleLE (T &...values)

template<class... T>
bool	readMultipleBE (T &...values)

SeekableReadStream *	readStream (uint32 dataSize)

String	readString (char terminator=0, size_t len=String::npos)

Common::String	readPascalString (bool transformCR=true)

Public Member Functions inherited from Common::WriteStream
virtual bool	flush ()

virtual void	finalize ()

void	writeByte (byte value)

void	writeSByte (int8 value)

void	writeUint16LE (uint16 value)

void	writeUint32LE (uint32 value)

void	writeUint64LE (uint64 value)

void	writeUint16BE (uint16 value)

void	writeUint32BE (uint32 value)

void	writeUint64BE (uint64 value)

FORCEINLINE void	writeSint16LE (int16 value)

FORCEINLINE void	writeSint32LE (int32 value)

FORCEINLINE void	writeSint64LE (int64 value)

FORCEINLINE void	writeSint16BE (int16 value)

FORCEINLINE void	writeSint32BE (int32 value)

FORCEINLINE void	writeSint64BE (int64 value)

FORCEINLINE void	writeFloatLE (float value)

FORCEINLINE void	writeFloatBE (float value)

FORCEINLINE void	writeDoubleLE (double value)

FORCEINLINE void	writeDoubleBE (double value)

template<class TDataFormat , class... T>
bool	writeMultiple (const TDataFormat &dataFormat, const T &...values)

template<class... T>
bool	writeMultipleEndian (bool isLittle, const T &...values)

template<class... T>
bool	writeMultipleLE (const T &...values)

template<class... T>
bool	writeMultipleBE (const T &...values)

uint32	writeStream (ReadStream *stream, uint32 dataSize)

uint32	writeStream (ReadStream *stream)

void	writeString (const String &str)

Detailed Description

A seekable read and writeable memory stream that operates on an already existing memory buffer

Member Function Documentation

◆ write()

uint32 Common::MemorySeekableReadWriteStream::write	(	const void *	dataPtr,
		uint32	dataSize
	)

inlineoverridevirtual

Write data into the stream. Subclasses must implement this method. All other write methods are implemented using it.

Note: The semantics of any implementation of this method is supposed to match that of ISO C fwrite().

Parameters

dataPtr	Pointer to the data to be written.
dataSize	Number of bytes to be written.

Returns: The number of bytes that were actually written.

Implements Common::WriteStream.

◆ pos()

int64 Common::MemorySeekableReadWriteStream::pos ( ) const

inlineoverridevirtual

Obtain the current value of the stream position indicator.

Returns: The current position indicator, or -1 if an error occurred.

Implements Common::SeekableReadStream.

◆ size()

int64 Common::MemorySeekableReadWriteStream::size ( ) const

inlineoverridevirtual

Obtain the current size of the stream, measured in bytes.

If this value is unknown or cannot be computed, -1 is returned.

Returns: The size of the stream, or -1 if an error occurred.

Implements Common::SeekableWriteStream.

◆ eos()

bool Common::MemorySeekableReadWriteStream::eos ( ) const

inlineoverridevirtual

Return true if a read failed because the stream end has been reached.

This flag is cleared by clearErr(). For a SeekableReadStream, the flag is also cleared by a successful seek.

Note: The semantics of any implementation of this method is supposed to match that of ISO C feof(). In particular, in a stream with N bytes, reading exactly N bytes from the start should not set eos; only reading beyond the available data should set it.

Implements Common::ReadStream.

◆ err()

bool Common::MemorySeekableReadWriteStream::err ( ) const

inlineoverridevirtual

Return true if an I/O failure occurred.

This flag is never cleared automatically. In order to clear it, the client code must call clearErr() explicitly.

Note: The semantics of any implementation of this method is supposed to match that of ISO C ferror().

Reimplemented from Common::Stream.

◆ clearErr()

void Common::MemorySeekableReadWriteStream::clearErr ( )

inlineoverridevirtual

Reset the I/O error status as returned by err().

For a ReadStream, also reset the end-of-stream status returned by eos().

Note: The semantics of any implementation of this method is supposed to match that of ISO C clearerr().

Reimplemented from Common::Stream.

◆ read()

uint32 Common::MemorySeekableReadWriteStream::read	(	void *	dataPtr,
		uint32	dataSize
	)

inlineoverridevirtual

Read data from the stream.

Subclasses must implement this method. All other read methods are implemented using it.

Note: The semantics of any implementation of this method is supposed to match that of ISO C fread(), in particular where it concerns setting error and end of file/stream flags.

Parameters

dataPtr	Pointer to a buffer into which the data is read.
dataSize	Number of bytes to be read.

Returns: The number of bytes that were actually read.

Implements Common::ReadStream.

◆ seek()

bool Common::MemorySeekableReadWriteStream::seek	(	int64	offset,
		int	whence = `SEEK_SET`
	)

inlineoverridevirtual

Set the stream position indicator for the stream.

The new position, measured in bytes, is obtained by adding offset bytes to the position specified by whence. If whence is set to SEEK_SET, SEEK_CUR, or SEEK_END, the offset is relative to the start of the file, the current position indicator, or end-of-stream, respectively. A successful call to the seek() method clears the end-of-stream indicator for the stream.

Note: The semantics of any implementation of this method is supposed to match that of ISO C fseek().

Parameters

offset	The relative offset in bytes.
whence	The seek reference: SEEK_SET, SEEK_CUR, or SEEK_END.

Returns: True on success, false in case of a failure.

Implements Common::SeekableWriteStream.

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

common/memstream.h

Public Member Functions

Detailed Description

Member Function Documentation

◆ write()

◆ pos()

◆ size()

◆ eos()

◆ err()

◆ clearErr()

◆ read()

◆ seek()