class Geo::IffReader

└>Geo::IGeoInputStream

An IffReader allows you to use an IGeoStream to read Iff format binary files easily.

It is passed an IGeoStream in its constructor and also implements IGeoStream, thus making it like an Adaptor pattern. Although the class uses the function name 'BeginFile' the underlying stream can be of any type.

Functions

Name	Description
~IGeoInputStream()	Deleting a stream should behave like a close operation.
BeginFile()	Step into the main FORM chunk, extract the file type tag.
Fail()	Put the reader directly into a fail state.
GetChunkSize()	Return the size of the current chunk.
GetFileType()	Return the file type tag that was stored in IffReader::BeginFile()
GetFileVersion()	Return the file version code that was stored in IffReader::BeginFile()
GetNextChunk(bool)	The method of reading Iff files is to iterate over the chunks by calling 'GetNextChunk' until the function returns Iff::EOFTag.
GetPosition()	Wrap the IGeoStream::GetPosition function.
GetPosition()	Return the position of the read/write pointer within the stream (prototype matches ftell)
IffReader(IGeoInputStream &)	Construct an IffReader with a pre-existing IGeoStream.
IsEof()	Wrap the IGeoStream::IsEof function.
IsEof()	Is the read pointer at the end of the file (as with feof, only returns true if you have read past end)
IsOk()	Wrap the IGeoStream::IsOk function, returning status of the IffWriter also.
IsOk()	Tests if the stream is valid.
IsReaderOk()	Return status of the reader Note: Prefer to use the IGeoStream::IsOk() method.
Read(void *, size_t, size_t)	Read data (prototype matches fread). Prefer to use the templated Read methods.
Read(void *, size_t, size_t)	Wrap the IGeoStream::Read function, tracking the return code.
Read(T &)	Read a single object, returning true on success.
Read(TIter, TIter)	Read a collection of objects, returning true on success.
Read(T(&))	Read a fixed size array.
ReadImpl(T &, GeoStd::TrueType)	Read a single object, returning true on success.
ReadImpl(T &, GeoStd::FalseType)	Read a single object, returning true on success.
ReadToEnd()	Reads the stream to its end and returns the data as a char array.
SetPosition(u64)	Wrap the IGeoStream::SetPosition function, be careful when jumping around inside IffReader.
SetPosition(Geo::u64)	Set the position of the read/write pointer within the stream (prototype matches fseek)

virtual Geo::IGeoInputStream::~IGeoInputStream

public: virtual ~IGeoInputStream()

Deleting a stream should behave like a close operation.

bool Geo::IffReader::BeginFile

public: bool BeginFile()

Step into the main FORM chunk, extract the file type tag.

From there, read the first chunk (which should be VERS) and then the version code. Leaves the IffReader ready to iterate on

void Geo::IffReader::Fail

public: void Fail()

Put the reader directly into a fail state.

size_t Geo::IffReader::GetChunkSize

public: size_t GetChunkSize() const

Return the size of the current chunk.

u32 Geo::IffReader::GetFileType

public: u32 GetFileType() const

Return the file type tag that was stored in IffReader::BeginFile()

s32 Geo::IffReader::GetFileVersion

public: s32 GetFileVersion() const

Return the file version code that was stored in IffReader::BeginFile()

u32 Geo::IffReader::GetNextChunk

public: u32 GetNextChunk
(
bool stepIntoChunk
)

The method of reading Iff files is to iterate over the chunks by calling 'GetNextChunk' until the function returns Iff::EOFTag.

stepIntoChunk Chunks are usually on the same level, but if you wish to arrange them in a hierarchy the reader will have to pass 'true' for this parameter when first looking for child chunks.When the list of child chunks is exhausted, the function will return EOFTag. If stepIntoChunk is set to true and an EOFTag is returned, GetNextChunk has to be called again with stepIntoChunk set to false to actually proceed reading the file.

virtual u64 Geo::IffReader::GetPosition

public: virtual u64 GetPosition() const

Wrap the IGeoStream::GetPosition function.

virtual Geo::u64 Geo::IGeoInputStream::GetPosition

public: Geo::u64 GetPosition() const

Return the position of the read/write pointer within the stream (prototype matches ftell)

Geo::IffReader::IffReader

public: IffReader
(
IGeoInputStream & stream
)

Construct an IffReader with a pre-existing IGeoStream.

virtual bool Geo::IffReader::IsEof

public: virtual bool IsEof() const

Wrap the IGeoStream::IsEof function.

virtual bool Geo::IGeoInputStream::IsEof

public: bool IsEof() const

Is the read pointer at the end of the file (as with feof, only returns true if you have read past end)

virtual bool Geo::IffReader::IsOk

public: virtual bool IsOk() const

Wrap the IGeoStream::IsOk function, returning status of the IffWriter also.

virtual bool Geo::IGeoInputStream::IsOk

public: bool IsOk() const

Tests if the stream is valid.

bool Geo::IffReader::IsReaderOk

public: bool IsReaderOk() const

Return status of the reader Note: Prefer to use the IGeoStream::IsOk() method.

virtual size_t Geo::IGeoInputStream::Read

public: size_t Read
(
void * pData,
size_t size,
size_t count
)

Read data (prototype matches fread). Prefer to use the templated Read methods.

virtual size_t Geo::IffReader::Read

public: virtual size_t Read
(
void * pData,
size_t size,
size_t count
)

Wrap the IGeoStream::Read function, tracking the return code.

GEO_FORCE_INLINE bool Geo::IGeoInputStream::Read

public: GEO_FORCE_INLINE bool Read
(
T & object
)

Read a single object, returning true on success.

There must either be a ReadObject overload for T, or T be considered blittable (see IsBlittable<T>).

bool Geo::IGeoInputStream::Read

public: bool Read
(
TIter begin,
TIter end
)

Read a collection of objects, returning true on success.

Object must be considered blittable (see IsBlittable<T>). Note that the storage must have been pre-allocated as it will write directly to the iterators provided. Given that we do not have the STL-style 'back-inserter' classes, for GeoArrays you should use the ReadArray helper function.

bool Geo::IGeoInputStream::Read

public: bool Read
(
T(&) a
)

Read a fixed size array.

bool Geo::IGeoInputStream::ReadImpl

public: bool ReadImpl
(
T & object,
GeoStd::TrueType
)

Read a single object, returning true on success.

There must either be a ReadObject overload for T, or T be considered blittable (see IsBlittable<T>).

bool Geo::IGeoInputStream::ReadImpl

public: bool ReadImpl
(
T & object,
GeoStd::FalseType
)

Read a single object, returning true on success.

There must either be a ReadObject overload for T, or T be considered blittable (see IsBlittable<T>).

virtual Geo::GeoArray<char> Geo::IGeoInputStream::ReadToEnd

public: virtual Geo::GeoArray< char > ReadToEnd()

Reads the stream to its end and returns the data as a char array.

virtual bool Geo::IffReader::SetPosition

public: virtual bool SetPosition
(
u64 pos
)

Wrap the IGeoStream::SetPosition function, be careful when jumping around inside IffReader.

virtual bool Geo::IGeoInputStream::SetPosition

public: bool SetPosition
(
Geo::u64 pos
)

Set the position of the read/write pointer within the stream (prototype matches fseek)

Browser not supported