;
\ Variables shared with object oriented code.
- VARIABLE OB-STATE ( Compilation state. )
- VARIABLE OB-CURRENT-CLASS ( ABS_CLASS_BASE of current class )
- 1 constant OB_DEF_CLASS ( defining a class )
- 2 constant OB_DEF_STRUCT ( defining a structure )
+VARIABLE OB-STATE ( Compilation state. )
+VARIABLE OB-CURRENT-CLASS ( ABS_CLASS_BASE of current class )
+1 constant OB_DEF_CLASS ( defining a class )
+2 constant OB_DEF_STRUCT ( defining a structure )
-4 constant OB_OFFSET_SIZE
+\ A member contains:
+\ cell size of data in bytes (1, 2, cell)
+\ cell offset within structure
+
+cell 1- constant CELL_MASK
+cell negate constant -CELL
+cell constant OB_OFFSET_SIZE
: OB.OFFSET@ ( member_def -- offset ) @ ;
: OB.OFFSET, ( value -- ) , ;
ABS ( -- |+-b| )
ob-current-class @ ( -- b addr-space)
tuck @ ( as #b c , current space needed )
- over 3 and 0= ( multiple of four? )
+ over CELL_MASK and 0= ( multiple of cell? )
IF
aligned
ELSE
\ Aliases
: APTR ( <name> -- ) long ;
-: RPTR ( <name> -- ) -4 bytes ; \ relative relocatable pointer 00001
+: RPTR ( <name> -- ) -cell bytes ; \ relative relocatable pointer 00001
: ULONG ( <name> -- ) long ;
: STRUCT ( <struct> <new_ivar> -- , define a structure as an ivar )