Function pg_encoding_mblen_bounded

src/common/wchar.c:1979–1983

* Returns the byte length of a multibyte character; but not more than * the distance to end of string. */

 * the distance to end of string.
 */
int
pg_encoding_mblen_bounded(int encoding, const char *mbstr)
{
	return strnlen(mbstr, pg_encoding_mblen(encoding, mbstr));
}

/*
 * Returns the display length of a multibyte character.