This class models a TIFF directory (Ifd). It is a composite component of the TIFF tree. More...

#include <tiffcomposite_int.hpp>

Inheritance diagram for Exiv2::Internal::TiffDirectory:

Public Member Functions
Creators
	TiffDirectory (uint16_t tag, IfdId group, bool hasNext=true)
	Default constructor.

	~TiffDirectory () override
	Virtual destructor.

NOT implemented
TiffDirectory &	operator= (const TiffDirectory &)=delete
	Assignment operator.

Accessors
bool	hasNext () const
	Return true if the directory has a next pointer.

Public Member Functions inherited from Exiv2::Internal::TiffComponent
constexpr	TiffComponent (uint16_t tag, IfdId group)
	Constructor.

virtual	~TiffComponent ()=default
	Virtual destructor.

	TiffComponent (const TiffComponent &)=default

TiffComponent &	operator= (const TiffComponent &)=default

TiffComponent *	addPath (uint16_t tag, TiffPath &tiffPath, TiffComponent *pRoot, UniquePtr object=nullptr)
	Add a TIFF entry tag to the component. Components on the path to the entry are added if they don't exist yet.

TiffComponent *	addChild (UniquePtr tiffComponent)
	Add a child to the component. Default is to do nothing.

TiffComponent *	addNext (UniquePtr tiffComponent)
	Add a "next" component to the component. Default is to do nothing.

void	accept (TiffVisitor &visitor)
	Interface to accept visitors (Visitor pattern). Visitors can perform operations on all components of the composite.

void	setStart (const byte *pStart)
	Set a pointer to the start of the binary representation of the component in a memory buffer. The buffer must be allocated and freed outside of this class.

size_t	write (IoWrapper &ioWrapper, ByteOrder byteOrder, size_t offset, size_t valueIdx, size_t dataIdx, size_t &imageIdx)
	Write a TiffComponent to a binary image.

uint16_t	tag () const
	Return the tag of this entry.

IfdId	group () const
	Return the group id of this component.

byte *	start () const
	Return a pointer to the start of the binary representation of the component.

UniquePtr	clone () const
	Return an auto-pointer to a copy of itself (deep copy, but without any children). The caller owns this copy and the auto-pointer ensures that it will be deleted.

size_t	writeData (IoWrapper &ioWrapper, ByteOrder byteOrder, size_t offset, size_t dataIdx, size_t &imageIdx) const
	Write the IFD data of this component to a binary image. Return the number of bytes written. Components derived from TiffEntryBase implement this method if needed.

size_t	writeImage (IoWrapper &ioWrapper, ByteOrder byteOrder) const
	Write the image data of this component to a binary image. Return the number of bytes written. TIFF components implement this method if needed.

size_t	size () const
	Return the size in bytes of the IFD value of this component when written to a binary image.

size_t	count () const
	Return the number of components in this component.

size_t	sizeData () const
	Return the size in bytes of the IFD data of this component when written to a binary image. This is a support function for write(). Components derived from TiffEntryBase implement this method corresponding to their implementation of writeData().

size_t	sizeImage () const
	Return the size in bytes of the image data of this component when written to a binary image. This is a support function for write(). TIFF components implement this method corresponding to their implementation of writeImage().

virtual int	idx () const
	Return the unique id of the entry in the image.

Protected Member Functions
Protected Creators
	TiffDirectory (const TiffDirectory &)=default
	Copy constructor (used to implement clone()).

Protected Manipulators
TiffComponent *	doAddPath (uint16_t tag, TiffPath &tiffPath, TiffComponent *pRoot, TiffComponent::UniquePtr object) override
	Implements addPath(). The default implementation does nothing.

TiffComponent *	doAddChild (TiffComponent::UniquePtr tiffComponent) override
	Implements addChild(). The default implementation does nothing.

TiffComponent *	doAddNext (TiffComponent::UniquePtr tiffComponent) override
	Implements addNext(). The default implementation does nothing.

void	doAccept (TiffVisitor &visitor) override
	Implements accept().

size_t	doWrite (IoWrapper &ioWrapper, ByteOrder byteOrder, size_t offset, size_t valueIdx, size_t dataIdx, size_t &imageIdx) override
	Implements write(). Write the TIFF directory, values and additional data, including the next-IFD, if any, to the ioWrapper, return the number of bytes written.

Protected Accessors
TiffDirectory *	doClone () const override
	Internal virtual copy constructor, implements clone().

size_t	doWriteData (IoWrapper &ioWrapper, ByteOrder byteOrder, size_t offset, size_t dataIdx, size_t &imageIdx) const override
	This class does not really implement writeData(), it only has write(). This method must not be called; it commits suicide.

size_t	doWriteImage (IoWrapper &ioWrapper, ByteOrder byteOrder) const override
	Implements writeImage(). Write the image data of the TIFF directory to the ioWrapper by forwarding the call to each component as well as the next-IFD, if there is any. Return the number of bytes written.

size_t	doSize () const override
	Implements size(). Return the size of the TIFF directory, values and additional data, including the next-IFD, if any.

size_t	doCount () const override
	Implements count(). Return the number of entries in the TIFF directory. Does not count entries which are marked as deleted.

size_t	doSizeData () const override
	This class does not really implement sizeData(), it only has size(). This method must not be called; it commits suicide.

size_t	doSizeImage () const override
	Implements sizeImage(). Return the sum of the image sizes of all components plus that of the next-IFD, if there is any.

Protected Member Functions inherited from Exiv2::Internal::TiffComponent

Friends
class	TiffEncoder

class	TiffDecoder

Additional Inherited Members
Public Types inherited from Exiv2::Internal::TiffComponent
using	UniquePtr = std::unique_ptr<TiffComponent>
	TiffComponent auto_ptr type.

using	Components = std::vector<TiffComponent*>
	Container type to hold all metadata.

Detailed Description

This class models a TIFF directory (Ifd). It is a composite component of the TIFF tree.

Member Function Documentation

◆ doAccept()

void Exiv2::Internal::TiffDirectory::doAccept ( TiffVisitor & visitor )

overrideprotectedvirtual

Implements accept().

Implements Exiv2::Internal::TiffComponent.

References Exiv2::Internal::TiffComponent::accept(), Exiv2::Internal::TiffVisitor::geTraverse, Exiv2::Internal::TiffVisitor::go(), Exiv2::Internal::TiffVisitor::visitDirectory(), Exiv2::Internal::TiffVisitor::visitDirectoryEnd(), and Exiv2::Internal::TiffVisitor::visitDirectoryNext().

◆ doAddChild()

TiffComponent * Exiv2::Internal::TiffDirectory::doAddChild ( TiffComponent::UniquePtr tiffComponent )

overrideprotectedvirtual

Implements addChild(). The default implementation does nothing.

Reimplemented from Exiv2::Internal::TiffComponent.

◆ doAddNext()

TiffComponent * Exiv2::Internal::TiffDirectory::doAddNext ( TiffComponent::UniquePtr tiffComponent )

overrideprotectedvirtual

Implements addNext(). The default implementation does nothing.

Reimplemented from Exiv2::Internal::TiffComponent.

◆ doAddPath()

TiffComponent * Exiv2::Internal::TiffDirectory::doAddPath	(	uint16_t	tag,
		TiffPath &	tiffPath,
		TiffComponent *	pRoot,
		TiffComponent::UniquePtr	object )

overrideprotectedvirtual

Implements addPath(). The default implementation does nothing.

Reimplemented from Exiv2::Internal::TiffComponent.

References Exiv2::Internal::TiffComponent::addChild(), Exiv2::Internal::TiffComponent::addNext(), Exiv2::Internal::TiffComponent::addPath(), Exiv2::Internal::TiffCreator::create(), Exiv2::Internal::TiffPathItem::extendedTag(), Exiv2::Internal::TiffPathItem::group(), Exiv2::Internal::Tag::next, Exiv2::Internal::TiffComponent::tag(), and Exiv2::Internal::TiffPathItem::tag().