Function pg_encoding_set_invalid

src/common/wchar.c:1899–1906

* Fills the provided buffer with two bytes such that: * pg_encoding_mblen(dst) == 2 && pg_encoding_verifymbstr(dst) == 0 */

 *   pg_encoding_mblen(dst) == 2 && pg_encoding_verifymbstr(dst) == 0
 */
void
pg_encoding_set_invalid(int encoding, char *dst)
{
	Assert(pg_encoding_max_length(encoding) > 1);

	dst[0] = (encoding == PG_UTF8 ? 0xc0 : NONUTF8_INVALID_BYTE0);
	dst[1] = NONUTF8_INVALID_BYTE1;
}

/*
 *-------------------------------------------------------------------