Exiv2::Internal::CiffDirectory Class Reference

This class models a CIFF directory of a CRW (Canon Raw data) image. More...

#include <crwimage_int.hpp>

Inheritance diagram for Exiv2::Internal::CiffDirectory:

Public Member Functions
Creators
	~CiffDirectory () override
	Virtual destructor.
	CiffDirectory (const CiffDirectory &)=delete
CiffDirectory &	operator= (const CiffDirectory &)=delete
Public Member Functions inherited from Exiv2::Internal::CiffComponent
	CiffComponent ()=default
	Default constructor.
	CiffComponent (uint16_t tag, uint16_t dir)
	Constructor taking a tag and directory.
	CiffComponent (const CiffComponent &)=delete
CiffComponent &	operator= (const CiffComponent &)=delete
virtual	~CiffComponent ()=default
	Virtual destructor.
void	decode (Image &image, ByteOrder byteOrder) const
	Decode metadata from the component and add it to image.
void	print (std::ostream &os, ByteOrder byteOrder, const std::string &prefix="") const
	Print debug info about a component to os.
void	writeDirEntry (Blob &blob, ByteOrder byteOrder) const
	Write a directory entry for the component to the blob. If the size of the data is not larger than 8 bytes, the data is written to the directory entry.
uint16_t	dir () const
	Return the tag of the directory containing this component.
uint16_t	tag () const
	Return the tag of this component.
bool	empty () const
	Return true if the component is empty, else false.
size_t	size () const
	Return the data size of this component.
size_t	offset () const
	Return the offset to the data from the start of the directory.
const byte *	pData () const
	Return a pointer to the data area of this component.
uint16_t	tagId () const
	Return the tag id of this component.
TypeId	typeId () const
	Return the type id of this component.
DataLocId	dataLocation () const
	Return the data location for this component.
CiffComponent *	findComponent (uint16_t crwTagId, uint16_t crwDir) const
	Finds crwTagId in directory crwDir, returning a pointer to the component or 0 if not found.
void	add (UniquePtr component)
	Add a component to the composition.
CiffComponent *	add (CrwDirs &crwDirs, uint16_t crwTagId)
	Add crwTagId to the parse tree, if it doesn't exist yet. crwDirs contains the path of subdirectories, starting with the root directory, leading to crwTagId. Directories that don't exist yet are added along the way. Returns a pointer to the newly added component.
void	remove (CrwDirs &crwDirs, uint16_t crwTagId)
	Remove crwTagId from the parse tree, if it exists yet. crwDirs contains the path of subdirectories, starting with the root directory, leading to crwTagId.
void	read (const byte *pData, size_t size, uint32_t start, ByteOrder byteOrder)
	Read a component from a data buffer.
size_t	write (Blob &blob, ByteOrder byteOrder, size_t offset)
	Write the metadata from the raw metadata component to the binary image blob. This method may append to the blob.
size_t	writeValueData (Blob &blob, size_t offset)
	Writes the entry's value if size is larger than eight bytes. If needed, the value is padded with one 0 byte to make the number of bytes written to the blob even. The offset of the component is set to the offset passed in.
void	setDir (uint16_t dir)
	Set the directory tag for this component.
void	setValue (DataBuf &&buf)
	Set the data value of the entry.

Manipulators
void	readDirectory (const byte *pData, size_t size, ByteOrder byteOrder)
	Parse a CIFF directory from a memory buffer.

Additional Inherited Members
Public Types inherited from Exiv2::Internal::CiffComponent
using	UniquePtr = std::unique_ptr< CiffComponent >
	CiffComponent auto_ptr type.
using	Components = std::vector< CiffComponent * >
	Container type to hold all metadata.
Static Public Member Functions inherited from Exiv2::Internal::CiffComponent
static TypeId	typeId (uint16_t tag)
	Return the type id for a tag.
static DataLocId	dataLocation (uint16_t tag)
	Return the data location id for a tag.
Protected Member Functions inherited from Exiv2::Internal::CiffComponent
void	setSize (size_t size)
	Set the size of the data area.
void	setOffset (size_t offset)
	Set the offset for this component.

Detailed Description

This class models a CIFF directory of a CRW (Canon Raw data) image.

Member Function Documentation

readDirectory()

void Exiv2::Internal::CiffDirectory::readDirectory	(	const byte *	pData,
		size_t	size,
		ByteOrder	byteOrder
	)

Parse a CIFF directory from a memory buffer.

Parameters

pData	Pointer to the memory buffer containing the directory
size	Size of the memory buffer
byteOrder	Applicable byte order (little or big endian)

References Exiv2::Internal::CiffComponent::add(), Exiv2::directory, Exiv2::getULong(), Exiv2::getUShort(), Exiv2::Internal::CiffComponent::pData(), Exiv2::Internal::CiffComponent::size(), Exiv2::Internal::CiffComponent::tag(), and Exiv2::Internal::CiffComponent::typeId().

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

• crwimage_int.hpp
• crwimage_int.cpp