Package dev.blaauwendraad.masker.json.util

Class Utf8Util

java.lang.Object

dev.blaauwendraad.masker.json.util.Utf8Util

public final class Utf8Util
extends Object

UTF-8 encoding utilities class

Method Summary

Modifier and Type	Method	Description
static int	countNonVisibleCharacters(byte[] message, int fromIndex, int length)	Counts the number of non-visible characters inside the string.
static int	getCodePointByteLength(byte input)	UTF-8: variable width 1-4 byte code points: 1 byte: 0xxxxxxx 2 bytes: 110xxxxx 10xxxxxx 3 bytes: 1110xxxx 10xxxxxx 10xxxxxx 4 bytes: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getCodePointByteLength

public static int getCodePointByteLength(byte input)

UTF-8: variable width 1-4 byte code points: 1 byte: 0xxxxxxx 2 bytes: 110xxxxx 10xxxxxx 3 bytes: 1110xxxx 10xxxxxx 10xxxxxx 4 bytes: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx

Parameters:

input - first (or only) code point byte

Returns:

code point length in bytes

countNonVisibleCharacters

public static int countNonVisibleCharacters(byte[] message,
 int fromIndex,
 int length)

Counts the number of non-visible characters inside the string. The intervals provided must be within a single string as this method will not do boundary checks or terminate at the end of string value.

Parameters:

message - the byte array containing the string

fromIndex - the starting index of the string value (after the quote)

length - the length of the string value (excluding the quotes)

Returns:

the number of non-visible characters in the string, i.e., escape characters, unicode characters (''), or other characters that are represented by more than a single byte are counted as one character