This section provides a quick introduction of the UTF-32LE (Unicode Transformation Format - 32-bit Big Endian) encoding for Unicode character set.
UTF-32LE: A character encoding schema that maps code points of Unicode character
set to a sequence of 4 bytes (32 bites). UTF-32LE stands for Unicode Transformation
Format - 32-bit Little Endian.
Here is my understanding of the UTF-32LE specification.
When UTF-32LE 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 least significant byte first.
For example, these 3 Unicode characters, U+004D, U+0061 and U+10000 will be
converted into 0x4D0000006100000000000100 when UTF-32LE is used.
When UTF-32LE 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 least significant byte first.
Note that the use of BOM (Byte Order Mark) is not part of the UTF-32LE specification. So you should:
Not prepend BOM sequence, 0xFFFE0000, to the output byte stream when encoding.
Not treat initial sequence of 0xFFFE0000 as BOM when decoding.
If it exists, convert the initial 0xFFFE0000 sequence as a
Unicode character, the ZERO WIDTH NO-BREAK SPACE, U+FEFF. character.
