This section provides a quick introduction of the UTF-32BE (Unicode Transformation Format - 32-bit Big Endian) encoding for Unicode character set.
UTF-32BE: A character encoding schema that maps code points of Unicode character
set to a sequence of 4 bytes (32 bites). UTF-32BE stands for Unicode Transformation
Format - 32-bit Big Endian.
Here is my understanding of the UTF-32BE specification.
When UTF-32BE encoding is used to encode (serialize) Unicode characters into a byte stream for communication or storage,
the code point of each character will be converted as a 32-bit integer into 4 bytes with the most significant byte first.
For example, these 3 Unicode characters, U+004D, U+0061 and U+10000 will be
converted into 0x0000004D0000006100010000 when UTF-32BE is used.
When UTF-32BE encoding is used to decode (deserialize) a byte stream into Unicode characters,
the entire stream will be divided into blocks of 4 bytes.
Each block is converted to a 32-bit integer to represent a Unicode code point assuming the most significant byte first.
Note that the use of BOM (Byte Order Mark) is not part of the UTF-32BE specification. So you should:
Not prepend BOM sequence, 0x0000FEFF, to the output byte stream when encoding.
Not treat initial sequence of 0x0000FEFF as BOM when decoding.
If it exists, convert the initial 0x0000FEFF sequence as a
Unicode character, the ZERO WIDTH NO-BREAK SPACE, U+FEFF, character.
