An entry in the IfdDir. More...

#include <ifdentry.hpp>

Public Types
typedef std::shared_ptr< IfdEntry >	Ref
	IfdEntry reference (ie shared pointer)

Public Member Functions
	IfdEntry (uint16_t _id, int16_t _type, int32_t _count, uint32_t _data, const IfdDir &_dir, bool synthetic=false)

int16_t	id () const noexcept
	id (i.e. tag) of the entry

int16_t	type () const noexcept
	Type of the entry data. More...

uint32_t	count () const noexcept
	The count of items in the entry.

off_t	offset () noexcept
	The offset of the data. More...

RawContainer::EndianType	endian () const
	Get the endian from the owning IfdDir.

const uint8_t *	dataptr () const
	Return the raw data pointer.

bool	loadData (size_t unit_size, off_t offset)
	Load the data for the entry if m_loaded is false. More...

size_t	loadDataInto (uint8_t *dataptr, size_t data_size, off_t offset) const
	Load data into a buffer. More...

void	setData (const uint8_t *dataptr, size_t data_size)
	Set the data of the entry.

Static Public Member Functions
static size_t	typeUnitSize (IFD::ExifTagType _type)
	Unit size for type.

Friends
template<typename T >
struct	IfdTypeTrait

Detailed Description

An entry in the IfdDir.

Definition at line 198 of file ifdentry.hpp.

Member Function Documentation

◆ loadData()

bool OpenRaw::Internals::IfdEntry::loadData	(	size_t	unit_size,
		off_t	offset
	)

Load the data for the entry if m_loaded is false.

If all the data fits in m_data, it will keep it there it will set m_loaded in case of success.

Parameters

unit_size	the size of 1 unit of data
offset	offset from the begining of the container. Usually 0.

Returns: true m_loaded

Definition at line 109 of file ifdentry.cpp.

◆ loadDataInto()

size_t OpenRaw::Internals::IfdEntry::loadDataInto	(	uint8_t *	dataptr,
		size_t	data_size,
		off_t	offset
	)		const

Load data into a buffer.

Parameters

dataptr	The target byte buffer.
data_size	the size of the buffer.
offset	An extra offset to load the data from. For a standard IFD it is 0.

Returns: Return the size effectively loaded.

Definition at line 96 of file ifdentry.cpp.

◆ offset()

off_t OpenRaw::Internals::IfdEntry::offset ( )

inlinenoexcept

The offset of the data.

It can just be the value if the entry is self contained.

Definition at line 232 of file ifdentry.hpp.

References endian(), and OpenRaw::Internals::RawContainer::ENDIAN_LITTLE.

◆ type()

int16_t OpenRaw::Internals::IfdEntry::type ( ) const

inlinenoexcept

Type of the entry data.

The value is from ExifTagType and is size like it is stored in the file.

Definition at line 217 of file ifdentry.hpp.

Referenced by OpenRaw::Internals::IfdDir::getEntryIntegerArrayItemValue(), and OpenRaw::Internals::IfdDir::makeMetaValue().

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

lib/ifdentry.hpp
lib/ifdentry.cpp

Public Types

Public Member Functions

Static Public Member Functions