Common::ReadStream Class Reference

#include <stream.h>

Inheritance diagram for Common::ReadStream:

Public Member Functions
virtual bool	eos () const =0
virtual uint32	read (void *dataPtr, uint32 dataSize)=0
Functions for reading data
The following methods all have default implementations. Subclasses in general should not overload them.
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::Stream
virtual bool	err () const
virtual void	clearErr ()

Detailed Description

Generic interface for a readable data stream.

Member Function Documentation

eos()

virtual bool Common::ReadStream::eos ( ) const

pure virtual

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.

Implemented in Common::SeekableReadStreamEndianWrapper, Common::MemorySeekableReadWriteStream, Common::MemoryReadWriteStream, Common::PackBitsReadStream, Twp::GGPackEntryReader, Twp::GGBnutReader, AGS3::AGS::Shared::ScummVMPackReadStream, Common::File, Scumm::ScummDiskImage, BladeRunner::SaveFileReadStream, AGS3::AGS::Shared::ScummVMReadStream, LastExpress::SavegameStream, Networking::NetworkReadStream, Twp::RangeStream, Common::MemoryReadStream, Scumm::ScummNESFile, Twp::XorStream, Scumm::ScummFile, Tinsel::TinselFile, NGI::MfcArchive, PspIoStream, Gob::SaveConverter, Common::SubReadStream, StdioStream, Bagel::SaveReadStream, Titanic::y222, ZVision::LzssReadStream, Common::PowerPackerStream, Common::ConcatReadStream, Twp::SoundStream, InFRAMSave, InPAKSave, TwinE::LzssReadStream, Twp::MemStream, RomfsStream, Grim::PackFile, and Groovie::LzssReadStream.

read()

virtual uint32 Common::ReadStream::read ( void *  dataPtr, uint32  dataSize  )

pure virtual

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.

Implemented in Common::SeekableReadStreamEndianWrapper, Common::MemorySeekableReadWriteStream, Common::MemoryReadWriteStream, Common::PackBitsReadStream, Twp::GGPackEntryReader, Twp::GGBnutReader, AGS3::AGS::Shared::ScummVMPackReadStream, Common::File, Scumm::ScummDiskImage, Common::SafeMutexedSeekableSubReadStream, Networking::NetworkReadStream, AGS3::AGS::Shared::ScummVMReadStream, BladeRunner::SaveFileReadStream, LastExpress::SavegameStream, Common::SafeSeekableSubReadStream, Twp::RangeStream, Scumm::ScummNESFile, Common::MemoryReadStream, Scumm::ScummFile, PspIoStream, Twp::XorStream, Tinsel::TinselFile, NGI::MfcArchive, StdioStream, Gob::SaveConverter, Common::SubReadStream, Common::PowerPackerStream, Common::ConcatReadStream, Bagel::SaveReadStream, ZVision::LzssReadStream, Titanic::y222, RomfsStream, Twp::SoundStream, TwinE::LzssReadStream, Twp::MemStream, Groovie::LzssReadStream, Grim::PackFile, and MutationOfJB::EncryptedFile.

readByte()

byte Common::ReadStream::readByte ( )

inline

Read an unsigned byte from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readSByte()

FORCEINLINE int8 Common::ReadStream::readSByte ( )

inline

Read a signed byte from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readUint16LE()

uint16 Common::ReadStream::readUint16LE ( )

inline

Read an unsigned 16-bit word stored in little endian (LSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readUint32LE()

uint32 Common::ReadStream::readUint32LE ( )

inline

Read an unsigned 32-bit word stored in little endian (LSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readUint64LE()

uint64 Common::ReadStream::readUint64LE ( )

inline

Read an unsigned 64-bit word stored in little endian (LSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readUint16BE()

uint16 Common::ReadStream::readUint16BE ( )

inline

Read an unsigned 16-bit word stored in big endian (MSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readUint32BE()

uint32 Common::ReadStream::readUint32BE ( )

inline

Read an unsigned 32-bit word stored in big endian (MSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readUint64BE()

uint64 Common::ReadStream::readUint64BE ( )

inline

Read an unsigned 64-bit word stored in big endian (MSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readSint16LE()

FORCEINLINE int16 Common::ReadStream::readSint16LE ( )

inline

Read a signed 16-bit word stored in little endian (LSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readSint32LE()

FORCEINLINE int32 Common::ReadStream::readSint32LE ( )

inline

Read a signed 32-bit word stored in little endian (LSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readSint64LE()

FORCEINLINE int64 Common::ReadStream::readSint64LE ( )

inline

Read a signed 64-bit word stored in little endian (LSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readSint16BE()

FORCEINLINE int16 Common::ReadStream::readSint16BE ( )

inline

Read a signed 16-bit word stored in big endian (MSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readSint32BE()

FORCEINLINE int32 Common::ReadStream::readSint32BE ( )

inline

Read a signed 32-bit word stored in big endian (MSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readSint64BE()

FORCEINLINE int64 Common::ReadStream::readSint64BE ( )

inline

Read a signed 64-bit word stored in big endian (MSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readFloatLE()

FORCEINLINE float Common::ReadStream::readFloatLE ( )

inline

Read a 32-bit floating point value stored in little endian (LSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readFloatBE()

FORCEINLINE float Common::ReadStream::readFloatBE ( )

inline

Read a 32-bit floating point value stored in big endian order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readDoubleLE()

FORCEINLINE double Common::ReadStream::readDoubleLE ( )

inline

Read a 64-bit floating point value stored in little endian (LSB first) order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readDoubleBE()

FORCEINLINE double Common::ReadStream::readDoubleBE ( )

inline

Read a 64-bit floating point value stored in big endian order from the stream and return it.

Performs no error checking. The return value is undefined if a read error occurred (for which the client code can check by calling err() and eos() ).

readMultiple()

template<class TDataFormat , class... T>

bool Common::ReadStream::readMultiple ( const TDataFormat &  dataFormat, T &...  values  )

inline

Read multiple values from the stream using a specified data format, return true on success and false on failure.

readMultipleEndian()

template<class... T>

bool Common::ReadStream::readMultipleEndian ( bool  isLittle, T &...  values  )

inline

Read multiple values from the stream using a specified endianness, return true on success and false on failure.

readMultipleLE()

template<class... T>

bool Common::ReadStream::readMultipleLE ( T &...  values )

inline

Read multiple values from the stream in little endian format, return true on success and false on failure.

readMultipleBE()

template<class... T>

bool Common::ReadStream::readMultipleBE ( T &...  values )

inline

Read multiple values from the stream in big endian format, return true on success and false on failure.

readStream()

SeekableReadStream* Common::ReadStream::readStream

(

uint32

dataSize

)

Read the specified amount of data into a malloc'ed buffer which is then wrapped into a MemoryReadStream.

The returned stream might contain less data than requested if reading more data failed. This is because of an I/O error or because the end of the stream was reached. It can be determined by calling err() and eos().

readString()

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

Reads in a terminated string. Upon successful completion, return a string with the content of the line, without the terminating character.

Parameters

terminator	The terminating character to use.
len	The maximum length to read (includes terminator).

readPascalString()

Common::String Common::ReadStream::readPascalString

(

bool

transformCR = true

)

Read a string in Pascal format, that is, one byte is string length, followed by string data.

Parameters

transformCR

If set (default), then transform \r into \n.

---

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

• common/stream.h