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(* onebyte2.mod provides an include on a packed byte.
Copyright (C) 2020 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Modula-2; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. *)
MODULE onebyte2 ;
FROM libc IMPORT exit, printf ;
FROM SYSTEM IMPORT SIZE, ADR, BYTE ;
PROCEDURE assert (b: BOOLEAN; file: ARRAY OF CHAR; line: CARDINAL) ;
BEGIN
IF NOT b
THEN
printf("%s:%d:assert failed\n", ADR (file), line) ;
r := 1
END
END assert ;
TYPE
color = (red, blue, green, yellow, cyan, purple, black) ;
smallInt = PACKEDSET OF [0..7] ;
smallEnum = PACKEDSET OF color ;
VAR
r: INTEGER ;
si: smallInt ;
se: smallEnum ;
BEGIN
r := 0 ;
assert (SIZE (smallInt) = SIZE (BYTE), __FILE__, __LINE__) ;
assert (SIZE (smallEnum) = SIZE (BYTE), __FILE__, __LINE__) ;
assert (SIZE (si) = SIZE (BYTE), __FILE__, __LINE__) ;
assert (SIZE (se) = SIZE (BYTE), __FILE__, __LINE__) ;
se := smallEnum {} ;
si := smallInt {} ;
INCL (si, 1) ;
INCL (se, purple) ;
assert (ORD (si) = 2, __FILE__, __LINE__) ;
assert (ORD (se) = 32, __FILE__, __LINE__) ;
exit (r)
END onebyte2.
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