Hi list, I'm reading Unicode 6.2.0 and have a question. In Section 2.5, Encoding Forms:
For example, when randomly accessing a string, a program can find the boundary of a character with limited backup. In UTF-16, if a pointer points to a leading surrogate, a single backup is required. In UTF-8, if a pointer points to a byte starting with 10xxxxxx (in binary), one to three backups are required to find the beginning of the character. What does the "backup" mean here? What does the program backup? I searched "backup" with unicode.org/search/ but didn't get anything that looked promising. Can anyone point me in the right direction? (English is not my native language; please excuse typing errors.) -- Best regards, Xue Fuqiao.
