| SYS-UTFBYTES(2) | System Calls Manual | SYS-UTFBYTES(2) |
utfbytes - compute UTF length of complete Unicode characters in a UTF byte sequence
include "sys.m"; sys := load Sys Sys->PATH; utfbytes: fn(buf: array of byte, n: int): int;
Utfbytes examines the n-byte UTF sequence in buf and returns the number of bytes representing complete Unicode characters. The value will be less than n when the region inspected ends with an incomplete UTF sequence.
A bounds check error results if n exceeds the length of the array.