MODULE CStructLayoutProg;
FROM SYSTEM IMPORT ADDRESS, ADR;
FROM CStructLayout IMPORT Mixed, Rect, FRect, RGBA;

PROCEDURE mixed_size () : INTEGER; EXTERNAL "m2_c_layout_mixed_size";
PROCEDURE rect_size () : INTEGER; EXTERNAL "m2_c_layout_rect_size";
PROCEDURE frect_size () : INTEGER; EXTERNAL "m2_c_layout_frect_size";
PROCEDURE rgba_size () : INTEGER; EXTERNAL "m2_c_layout_rgba_size";
PROCEDURE off (base, field : ADDRESS; which : INTEGER) : INTEGER;
  EXTERNAL "m2_c_layout_offset";

VAR
  ExitCode : INTEGER;
  m : Mixed;

BEGIN
  IF (SIZE(Mixed) = mixed_size())
     AND (SIZE(Rect) = rect_size())
     AND (SIZE(FRect) = frect_size())
     AND (SIZE(RGBA) = rgba_size())
     AND (off(ADR(m), ADR(m.b), 0) = 1)
     AND (off(ADR(m), ADR(m.f), 1) = 1)
     AND (off(ADR(m), ADR(m.d), 2) = 1)
     AND (off(ADR(m), ADR(m.i), 3) = 1)
     AND (off(ADR(m), ADR(m.p), 4) = 1) THEN
    ExitCode := 42
  ELSE
    ExitCode := 1
  END
END CStructLayoutProg.