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FP_OFF() Get or Set Offset Portion of a Far Pointer (Macro)
#include <dos.h>
unsigned FP_OFF(longptr);
char far *longptr; Long pointer to memory address
FP_OFF() is a macro that can be used to get or set the offset portion
of the far pointer 'longptr'.
Returns: An unsigned integer value representing an offset.
Notes: FP_OFF() is a macro.
-------------------------------- Example ---------------------------------
The following example gets the offset portion of a far pointer and
increments it by one.
#include <dos.h>
char far *ptr;
unsigned int off_val;
main()
{
off_val = FP_OFF(ptr);
FP_OFF(ptr) = ++off_val
if off_val == 0
perror("Segment Wrap caused by incrementing offset")
}
See Also:
FP_SEG()
segread()
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