Exiv2::AsciiValue Class Reference
Value for an Ascii string type. More...
#include <value.hpp>
Inheritance diagram for Exiv2::AsciiValue:
Public Types | |
| using UniquePtr = std::unique_ptr< AsciiValue > | |
| Shortcut for a AsciiValue auto pointer. | |
 Public Types inherited from Exiv2::StringValueBase | |
| using UniquePtr = std::unique_ptr< StringValueBase > | |
| Shortcut for a StringValueBase auto pointer. | |
| Public Types inherited from Exiv2::Value | |
| using UniquePtr = std::unique_ptr< Value > | |
| Shortcut for a Value auto pointer. |
Public Member Functions | |
Creators | |
| AsciiValue () | |
| Default constructor. | |
| AsciiValue (const std::string &buf) | |
| Constructor. | |
Manipulators | |
| int read (const std::string &buf) override | |
| Set the value to that of the string buf. Overrides base class to append a terminating '\0' character if buf doesn't end with '\0'. | |
| int read (const std::string &buf) override | |
| Read the value from buf. This default implementation uses buf as it is. | |
| int read (const byte *buf, size_t len, ByteOrder byteOrder=invalidByteOrder) override | |
| Read the value from a character buffer. | |
| Public Member Functions inherited from Exiv2::StringValueBase | |
| StringValueBase (TypeId typeId, const std::string &buf) | |
| Constructor for subclasses. | |
| int read (const std::string &buf) override | |
| Read the value from buf. This default implementation uses buf as it is. | |
| int read (const byte *buf, size_t len, ByteOrder byteOrder=invalidByteOrder) override | |
| Read the value from a character buffer. | |
| UniquePtr clone () const | |
| size_t copy (byte *buf, ByteOrder byteOrder=invalidByteOrder) const override | |
| Write value to a character data buffer. | |
| size_t count () const override | |
| Return the number of components of the value. | |
| size_t size () const override | |
| Return the size of the value in bytes. | |
| int64_t toInt64 (size_t n=0) const override | |
| Convert the n-th component of the value to an int64_t. The behaviour of this method may be undefined if there is no n-th component. | |
| uint32_t toUint32 (size_t n=0) const override | |
| Convert the n-th component of the value to a float. The behaviour of this method may be undefined if there is no n-th component. | |
| float toFloat (size_t n=0) const override | |
| Convert the n-th component of the value to a float. The behaviour of this method may be undefined if there is no n-th component. | |
| Rational toRational (size_t n=0) const override | |
| Convert the n-th component of the value to a Rational. The behaviour of this method may be undefined if there is no n-th component. | |
| std::ostream & write (std::ostream &os) const override | |
| Write the value to an output stream. You do not usually have to use this function; it is used for the implementation of the output operator for Value, operator<<(std::ostream &os, const Value &value). | |
| Public Member Functions inherited from Exiv2::Value | |
| Value (TypeId typeId) | |
| Constructor, taking a type id to initialize the base class with. | |
| virtual ~Value ()=default | |
| Virtual destructor. | |
| virtual int setDataArea (const byte *buf, size_t len) | |
| Set the data area, if the value has one by copying (cloning) the buffer pointed to by buf. | |
| TypeId typeId () const | |
| Return the type identifier (Exif data format type). | |
| UniquePtr clone () const | |
| Return an auto-pointer to a copy of itself (deep copy). The caller owns this copy and the auto-pointer ensures that it will be deleted. | |
| std::string toString () const | |
| Return the value as a string. Implemented in terms of write(std::ostream& os) const of the concrete class. | |
| virtual std::string toString (size_t n) const | |
| Return the n-th component of the value as a string. The default implementation returns toString(). The behaviour of this method may be undefined if there is no n-th component. | |
| virtual size_t sizeDataArea () const | |
| Return the size of the data area, 0 if there is none. | |
| virtual DataBuf dataArea () const | |
| Return a copy of the data area if the value has one. The caller owns this copy and DataBuf ensures that it will be deleted. | |
| bool ok () const | |
| Check the ok status indicator. After a to<Type> conversion, this indicator shows whether the conversion was successful. |
Accessors | |
| UniquePtr clone () const | |
| std::ostream & write (std::ostream &os) const override | |
| Write the ASCII value up to the first '\0' character to an output stream. Any further characters are ignored and not written to the output stream. |
Additional Inherited Members | |
| Static Public Member Functions inherited from Exiv2::Value | |
| static UniquePtr create (TypeId typeId) | |
| A (simple) factory to create a Value type. | |
| Public Attributes inherited from Exiv2::StringValueBase | |
| std::string value_ | |
| Stores the string value. | |
| Protected Member Functions inherited from Exiv2::StringValueBase | |
| Protected Member Functions inherited from Exiv2::Value | |
| Value (const Value &)=default | |
| Value & operator= (const Value &)=default | |
| Assignment operator. Protected so that it can only be used by subclasses but not directly. | |
| Protected Attributes inherited from Exiv2::Value | |
| bool ok_ {true} | |
| Indicates the status of the previous to<Type> conversion. |
Detailed Description
Value for an Ascii string type.
This class is for null terminated single byte Ascii strings. This class also ensures that the string is null terminated.
Member Function Documentation
◆ read() [1/3]
|
overridevirtual |
Read the value from a character buffer.
- Parameters
-
buf Pointer to the data buffer to read from len Number of bytes in the data buffer byteOrder Applicable byte order (little or big endian).
- Returns
- 0 if successful.
Implements Exiv2::Value.
◆ read() [2/3]
|
overridevirtual |
Read the value from buf. This default implementation uses buf as it is.
Implements Exiv2::Value.
◆ read() [3/3]
|
overridevirtual |
Set the value to that of the string buf. Overrides base class to append a terminating '\0' character if buf doesn't end with '\0'.
Implements Exiv2::Value.
◆ write()
|
overridevirtual |
Write the ASCII value up to the first '\0' character to an output stream. Any further characters are ignored and not written to the output stream.
Implements Exiv2::Value.
The documentation for this class was generated from the following file:
- value.hpp