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tagparser
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Allow converting the description encoding

This commit is contained in:
Martchus 2019-06-01 22:57:01 +02:00
parent 7885b99f72
commit a8e20c5ef4
2 changed files with 53 additions and 6 deletions
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41
tagvalue.cpp
View File

@ -436,6 +436,47 @@ void TagValue::convertDataEncodingForTag(const Tag *tag)
}
}
/*!
* \brief Converts the assigned description to use the specified \a encoding.
*/
void TagValue::convertDescriptionEncoding(TagTextEncoding encoding)
{
if (encoding == m_descEncoding) {
return;
}
if (m_desc.empty()) {
m_descEncoding = encoding;
return;
}
StringData encodedData;
switch (encoding) {
case TagTextEncoding::Utf8:
// use pre-defined methods when encoding to UTF-8
switch (dataEncoding()) {
case TagTextEncoding::Latin1:
encodedData = convertLatin1ToUtf8(m_ptr.get(), m_size);
break;
case TagTextEncoding::Utf16LittleEndian:
encodedData = convertUtf16LEToUtf8(m_ptr.get(), m_size);
break;
case TagTextEncoding::Utf16BigEndian:
encodedData = convertUtf16BEToUtf8(m_ptr.get(), m_size);
break;
default:;
}
break;
default: {
// otherwise, determine input and output parameter to use general covertString method
const auto inputParameter = encodingParameter(m_descEncoding);
const auto outputParameter = encodingParameter(encoding);
encodedData = convertString(
inputParameter.first, outputParameter.first, m_desc.data(), m_desc.size(), outputParameter.second / inputParameter.second);
}
}
m_desc.assign(encodedData.first.get(), encodedData.second);
m_descEncoding = encoding;
}
/*!
* \brief Converts the value of the current TagValue object to its equivalent
* std::string representation.

18
tagvalue.h
View File

@ -119,6 +119,7 @@ public:
void convertDataEncoding(TagTextEncoding encoding);
void convertDataEncodingForTag(const Tag *tag);
TagTextEncoding descriptionEncoding() const;
void convertDescriptionEncoding(TagTextEncoding encoding);
static const TagValue &empty();
void assignText(const char *text, std::size_t textSize, TagTextEncoding textEncoding = TagTextEncoding::Latin1,
@ -477,9 +478,12 @@ inline const char *TagValue::dataPointer() const
/*!
* \brief Returns the description.
* \remarks The usage of this meta information depends on the tag implementation.
* \sa descriptionEncoding()
* \sa setDescription()
* \remarks The usage of this meta information depends on the tag implementation. It might be ignored
* if not supported.
* \sa
* - descriptionEncoding() for the encoding of the returned string
* - convertDescriptionEncoding() to change the encoding of the description
* - setDescription() for setting the description
*/
inline const std::string &TagValue::description() const
{
@ -490,9 +494,11 @@ inline const std::string &TagValue::description() const
* \brief Sets the description.
* \param value Specifies the description.
* \param encoding Specifies the encoding used to provide the description.
* \remarks The usage of this meta information depends on the tag implementation.
* \sa description()
* \sa descriptionEncoding()
* \remarks The usage of this meta information depends on the tag implementation. It might be ignored
* if not supported.
* \sa
* - description() and descriptionEncoding()
* - convertDescriptionEncoding() to change the description encoding after assignment
*/
inline void TagValue::setDescription(const std::string &value, TagTextEncoding encoding)
{