Exiv2::IptcData Class Reference

A container for IPTC data. This is a top-level class of the Exiv2 library. More...

#include <iptc.hpp>

Public Types
using	iterator = IptcMetadata::iterator
	IptcMetadata iterator type.
using	const_iterator = IptcMetadata::const_iterator
	IptcMetadata const iterator type.

Public Member Functions
Manipulators
Iptcdatum &	operator[] (const std::string &key)
	Returns a reference to the Iptcdatum that is associated with a particular key. If IptcData does not already contain such an Iptcdatum, operator[] adds object Iptcdatum(key).
int	add (const IptcKey &key, const Value *value)
	Add an Iptcdatum from the supplied key and value pair. This method copies (clones) the value. A check for non-repeatable datasets is performed.
int	add (const Iptcdatum &iptcdatum)
	Add a copy of the Iptcdatum to the IPTC metadata. A check for non-repeatable datasets is performed.
iterator	erase (iterator pos)
	Delete the Iptcdatum at iterator position pos, return the position of the next Iptcdatum. Note that iterators into the metadata, including pos, are potentially invalidated by this call.
void	clear ()
	Delete all Iptcdatum instances resulting in an empty container.
void	sortByKey ()
	Sort metadata by key.
void	sortByTag ()
	Sort metadata by tag (aka dataset)
iterator	begin ()
	Begin of the metadata.
iterator	end ()
	End of the metadata.
iterator	findKey (const IptcKey &key)
	Find the first Iptcdatum with the given key, return an iterator to it.
iterator	findId (uint16_t dataset, uint16_t record=IptcDataSets::application2)
	Find the first Iptcdatum with the given record and dataset it, return a const iterator to it.

Accessors
const_iterator	begin () const
	Begin of the metadata.
const_iterator	end () const
	End of the metadata.
const_iterator	findKey (const IptcKey &key) const
	Find the first Iptcdatum with the given key, return a const iterator to it.
const_iterator	findId (uint16_t dataset, uint16_t record=IptcDataSets::application2) const
	Find the first Iptcdatum with the given record and dataset number, return a const iterator to it.
bool	empty () const
	Return true if there is no IPTC metadata.
size_t	count () const
	Get the number of metadata entries.
size_t	size () const
	Return the exact size of all contained IPTC metadata.
const char *	detectCharset () const
	Return the metadata charset name or 0.
static void	printStructure (std::ostream &out, const Slice< byte * > &bytes, size_t depth)
	dump iptc formatted binary data (used by printStructure kpsRecursive)

Detailed Description

A container for IPTC data. This is a top-level class of the Exiv2 library.

Provide high-level access to the IPTC data of an image:

• read IPTC information from JPEG files
• access metadata through keys and standard C++ iterators
• add, modify and delete metadata
• write IPTC data to JPEG files
• extract IPTC metadata to files, insert from these files

Examples

iptceasy.cpp, and iptcprint.cpp.

Member Function Documentation

add() [1/2]

int Exiv2::IptcData::add

(

const Iptcdatum &

iptcdatum

)

Add a copy of the Iptcdatum to the IPTC metadata. A check for non-repeatable datasets is performed.

Returns

0 if successful;
6 if the dataset already exists and is not repeatable;

References Exiv2::IptcDataSets::dataSetRepeatable(), end(), findId(), Exiv2::Iptcdatum::record(), and Exiv2::Iptcdatum::tag().

add() [2/2]

int Exiv2::IptcData::add	(	const IptcKey &	key,
		const Value *	value
	)

Add an Iptcdatum from the supplied key and value pair. This method copies (clones) the value. A check for non-repeatable datasets is performed.

Returns

0 if successful;
6 if the dataset already exists and is not repeatable

References add().

Referenced by add(), and Exiv2::Converter::cnvXmpValueToIptc().

operator[]()

Iptcdatum & Exiv2::IptcData::operator[]

(

const std::string &

key

)

Returns a reference to the Iptcdatum that is associated with a particular key. If IptcData does not already contain such an Iptcdatum, operator[] adds object Iptcdatum(key).

Note

Since operator[] might insert a new element, it can't be a const member function.

References end(), and findKey().

sortByKey()

void Exiv2::IptcData::sortByKey

(

)

Sort metadata by key.

References Exiv2::cmpMetadataByKey().

sortByTag()

void Exiv2::IptcData::sortByTag

(

)

Sort metadata by tag (aka dataset)

References Exiv2::cmpMetadataByTag().

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

• iptc.hpp
• iptc.cpp