value.hpp File Reference

Value interface and concrete subclasses. More...

#include "exiv2lib_export.h"
#include "types.hpp"
#include <map>
#include <iomanip>
#include <memory>
#include <cstring>
#include <climits>

Go to the source code of this file.

Classes
class	Exiv2::Value
	Common interface for all types of values used with metadata. More...
class	Exiv2::DataValue
	Value for an undefined data type. More...
class	Exiv2::StringValueBase
	Abstract base class for a string based Value type. More...
class	Exiv2::StringValue
	Value for string type. More...
class	Exiv2::AsciiValue
	Value for an Ascii string type. More...
class	Exiv2::CommentValue
	Value for an Exif comment. More...
struct	Exiv2::CommentValue::CharsetTable
	Information pertaining to the defined character sets. More...
class	Exiv2::CommentValue::CharsetInfo
	Charset information lookup functions. Implemented as a static class. More...
class	Exiv2::XmpValue
	Base class for all Exiv2 values used to store XMP property values. More...
class	Exiv2::XmpTextValue
	Value type suitable for simple XMP properties and XMP nodes of complex types which are not parsed into specific values. More...
class	Exiv2::XmpArrayValue
	Value type for simple arrays. Each item in the array is a simple value, without qualifiers. The array may be an ordered (seq), unordered (bag) or alternative array (alt). The array items must not contain qualifiers. For language alternatives use LangAltValue. More...
struct	Exiv2::LangAltValueComparator
	LangAltValueComparator More...
class	Exiv2::LangAltValue
	Value type for XMP language alternative properties. More...
class	Exiv2::DateValue
	Value for simple ISO 8601 dates More...
struct	Exiv2::DateValue::Date
	Simple Date helper structure. More...
class	Exiv2::TimeValue
	Value for simple ISO 8601 times. More...
struct	Exiv2::TimeValue::Time
	Simple Time helper structure. More...
class	Exiv2::ValueType< T >
	Template for a Value of a basic type. This is used for unsigned and signed short, long and rationals. More...

Namespaces
	Exiv2
	Provides classes and functions to encode and decode Exif and Iptc data. The libexiv2 API consists of the objects of this namespace.

Macros
#define	LARGE_INT   1000000

Typedefs
typedef ValueType< uint16_t >	Exiv2::UShortValue
	Unsigned short value type.
typedef ValueType< uint32_t >	Exiv2::ULongValue
	Unsigned long value type.
typedef ValueType< URational >	Exiv2::URationalValue
	Unsigned rational value type.
typedef ValueType< int16_t >	Exiv2::ShortValue
	Signed short value type.
typedef ValueType< int32_t >	Exiv2::LongValue
	Signed long value type.
typedef ValueType< Rational >	Exiv2::RationalValue
	Signed rational value type.
typedef ValueType< float >	Exiv2::FloatValue
	Float value type.
typedef ValueType< double >	Exiv2::DoubleValue
	Double value type.

Functions
std::ostream &	Exiv2::operator<< (std::ostream &os, const Value &value)
	Output operator for Value types.
template<typename T >
TypeId	Exiv2::getType ()
	Template to determine the TypeId for a type T.
template<>
TypeId	Exiv2::getType< uint16_t > ()
	Specialization for an unsigned short.
template<>
TypeId	Exiv2::getType< uint32_t > ()
	Specialization for an unsigned long.
template<>
TypeId	Exiv2::getType< URational > ()
	Specialization for an unsigned rational.
template<>
TypeId	Exiv2::getType< int16_t > ()
	Specialization for a signed short.
template<>
TypeId	Exiv2::getType< int32_t > ()
	Specialization for a signed long.
template<>
TypeId	Exiv2::getType< Rational > ()
	Specialization for a signed rational.
template<>
TypeId	Exiv2::getType< float > ()
	Specialization for a float.
template<>
TypeId	Exiv2::getType< double > ()
	Specialization for a double.
template<typename T >
T	Exiv2::getValue (const byte *buf, ByteOrder byteOrder)
	Read a value of type T from the data buffer. More...
template<>
uint16_t	Exiv2::getValue (const byte *buf, ByteOrder byteOrder)
	Read a value of type T from the data buffer. More...
template<>
uint32_t	Exiv2::getValue (const byte *buf, ByteOrder byteOrder)
	Read a value of type T from the data buffer. More...
template<>
URational	Exiv2::getValue (const byte *buf, ByteOrder byteOrder)
	Read a value of type T from the data buffer. More...
template<>
int16_t	Exiv2::getValue (const byte *buf, ByteOrder byteOrder)
	Read a value of type T from the data buffer. More...
template<>
int32_t	Exiv2::getValue (const byte *buf, ByteOrder byteOrder)
	Read a value of type T from the data buffer. More...
template<>
Rational	Exiv2::getValue (const byte *buf, ByteOrder byteOrder)
	Read a value of type T from the data buffer. More...
template<>
float	Exiv2::getValue (const byte *buf, ByteOrder byteOrder)
	Read a value of type T from the data buffer. More...
template<>
double	Exiv2::getValue (const byte *buf, ByteOrder byteOrder)
	Read a value of type T from the data buffer. More...
template<typename T >
long	Exiv2::toData (byte *buf, T t, ByteOrder byteOrder)
	Convert a value of type T to data, write the data to the data buffer. More...
template<>
long	Exiv2::toData (byte *buf, uint16_t t, ByteOrder byteOrder)
	Specialization to write an unsigned short to the data buffer. Return the number of bytes written.
template<>
long	Exiv2::toData (byte *buf, uint32_t t, ByteOrder byteOrder)
	Specialization to write an unsigned long to the data buffer. Return the number of bytes written.
template<>
long	Exiv2::toData (byte *buf, URational t, ByteOrder byteOrder)
	Specialization to write an unsigned rational to the data buffer. Return the number of bytes written.
template<>
long	Exiv2::toData (byte *buf, int16_t t, ByteOrder byteOrder)
	Specialization to write a signed short to the data buffer. Return the number of bytes written.
template<>
long	Exiv2::toData (byte *buf, int32_t t, ByteOrder byteOrder)
	Specialization to write a signed long to the data buffer. Return the number of bytes written.
template<>
long	Exiv2::toData (byte *buf, Rational t, ByteOrder byteOrder)
	Specialization to write a signed rational to the data buffer. Return the number of bytes written.
template<>
long	Exiv2::toData (byte *buf, float t, ByteOrder byteOrder)
	Specialization to write a float to the data buffer. Return the number of bytes written.
template<>
long	Exiv2::toData (byte *buf, double t, ByteOrder byteOrder)
	Specialization to write a double to the data buffer. Return the number of bytes written.

Detailed Description

Value interface and concrete subclasses.

Author

Andreas Huggel (ahu) ahuggel@gmx.net

Date

09-Jan-04, ahu: created 11-Feb-04, ahu: isolated as a component 31-Jul-04, brad: added Time, Data and String values