QByteArray input = "Aladdin:open sesame";
QByteArray result = KCodecs::base64Encode(input);
cout << "Result: " << result.data() << endl;

Result: QWxhZGRpbjpvcGVuIHNlc2FtZQ==

Function Documentation

[since 5.84] QByteArray KCodecs::base45Decode(QByteArrayView in)

Decodes the given data that was encoded using the base45 codec.

in data to be decoded.

Returns decoded string.

This function was introduced in 5.84.

See also https://datatracker.ietf.org/doc/draft-faltstrom-base45/.

QByteArray KCodecs::base64Decode(QByteArrayView in)

Decodes the given data that was encoded using the base64 algorithm.

in data to be decoded.

Returns decoded string.

void KCodecs::base64Decode(QByteArrayView in, QByteArray &out)

Decodes the given data that was encoded with the base64 algorithm.

Use this function if you want the result of the decoding to be placed in another array which cuts down the number of copy operation that have to be performed in the process. This is also the preferred method for decoding an encoded binary data.

in data to be decoded.

out decoded data.

[since 5.5] QByteArray KCodecs::base64Encode(QByteArrayView in)

Encodes the given data using the base64 algorithm.

The boolean argument determines if the encoded data is going to be restricted to 76 characters or less per line as specified by RFC 2045.

in data to be encoded.

Returns base64 encoded string.

This function was introduced in 5.5.

void KCodecs::base64Encode(QByteArrayView in, QByteArray &out, bool insertLFs = false)

Encodes the given data using the base64 algorithm.

Use this function if you want the result of the encoding to be placed in another array which cuts down the number of copy operation that have to be performed in the process. This is also the preferred method for encoding binary data.

The boolean argument determines if the encoded data is going to be restricted to 76 characters or less per line as specified by RFC 2045. If insertLFs is true, then there will be 76 characters or less per line.

in data to be encoded.

out encoded data.

insertLFs limit the number of characters per line.

QString KCodecs::decodeRFC2047String(QStringView text)

Decodes string text according to RFC2047, i.e., the construct =?charset?[qb]?encoded?=

text source string

Returns the decoded string

[since 5.5] QString KCodecs::decodeRFC2047String(QByteArrayView src, QByteArray *usedCS, const QByteArray &defaultCS = QByteArray(), KCodecs::CharsetOption option = NoOption)

Decodes string src according to RFC2047, i.e. the construct =?charset?[qb]?encoded?=

src source string.

usedCS the name of any detected charset or, in case of multiple different ones, "UTF-8" as that of a super charset is returned here

defaultCS the charset to use in case the detected one isn't known to us.

option options for the encoder

Returns the decoded string.

This function was introduced in 5.5.

[since 5.5] QByteArray KCodecs::encodeRFC2047String(QStringView src, const QByteArray &charset)

Encodes string src according to RFC2047 using charset charset.

This function also makes commas, quotes and other characters part of the encoded name, for example the string "Jöhn Döe" <john@example.com"> would be encoded as <encoded word for "Jöhn Döe"> <john@example.com>, i.e. the opening and closing quote mark would be part of the encoded word. Therefore don't use this function for input strings that contain semantically meaningful characters, like the quoting marks in this example.

src source string.

charset charset to use. If it can't encode the string, UTF-8 will be used instead.

Returns the encoded string.

This function was introduced in 5.5.

[since 5.5] QByteArray KCodecs::quotedPrintableDecode(QByteArrayView in)

Decodes a quoted-printable encoded data.

Accepts data with CRLF or standard unix line breaks.

in data to be decoded.

Returns decoded string.

This function was introduced in 5.5.

void KCodecs::quotedPrintableDecode(QByteArrayView in, QByteArray &out)

Decodes a quoted-printable encoded data.

Accepts data with CRLF or standard unix line breaks. Use this function if you want the result of the decoding to be placed in another array which cuts down the number of copy operation that have to be performed in the process. This is also the preferred method for decoding an encoded binary data.

in data to be decoded.

out decoded data.

QByteArray KCodecs::quotedPrintableEncode(QByteArrayView in, bool useCRLF = true)

Encodes the given data using the quoted-printable algorithm.

in the data to be encoded.

useCRLF if true the input data is expected to have CRLF line breaks and the output will have CRLF line breaks, too.

Returns quoted-printable encoded string.

void KCodecs::quotedPrintableEncode(QByteArrayView in, QByteArray &out, bool useCRLF)

Encodes the given data using the quoted-printable algorithm.

Use this function if you want the result of the encoding to be placed in another array which cuts down the number of copy operation that have to be performed in the process. This is also the preferred method for encoding binary data.

in data to be encoded.

out encoded data.

useCRLF if true the input data is expected to have CRLF line breaks and the output will have CRLF line breaks, too.

QByteArray KCodecs::uudecode(QByteArrayView in)

Decodes the given data using the uudecode algorithm.

Any 'begin' and 'end' lines like those generated by the utilities in unix and unix-like OS will be automatically ignored.

in the data to be decoded.

Returns the decoded string.

void KCodecs::uudecode(QByteArrayView in, QByteArray &out)

Decodes the given data using the uudecode algorithm.

Use this function if you want the result of the decoding to be placed in another array which cuts down the number of copy operation that have to be performed in the process. This is the preferred method for decoding binary data.

Any 'begin' and 'end' lines like those generated by the utilities in unix and unix-like OS will be automatically ignored.

in data to be decoded.

out uudecoded data.