FP_OFF, FP_SEG

Gets a far address offset or segment.

Defined in header <dos.h>

Syntax

#include <dos.h>
unsigned FP_OFF(void  far *p);
unsigned FP_SEG(void  far *p);

Portability

Remarks

The FP_OFF macro can be used to get or set the offset of the far pointer *p.

FP_SEG is a macro that gets or sets the segment value of the far pointer *p.

Return value

FP_OFF returns an unsigned integer value representing an offset value.

FP_SEG returns an unsigned integer representing a segment value.

See also

• MKJFP
• movedata
• segread

Example

#include <dos.h>
#include <stdio.h>
#include <graphics.h>

/* FP_OFF V
int fp_off(void)
   char *str = "fpoff.c";

   printfC'The offset of this file name in memory\
     is: %Fp\n", FP_OFF(str));

   return 0;

/* FP_SEG */
int fp_seg(void)
{
   char *filename = "fpseg.c";

   printfC'The segment of this file in memory\
     is: %Fp\n", FP_SEG(filename));

   return(0);

/* MK_FP V
int main(void)

   mt  gd, gm, i;
   unsigned int far *screen;

   detectgraph(&gd, &gm);
   if (gd == HERCMONO)
  screen = (unsigned int *) MK_FP(OxBOOO,
   else
  screen = (unsigned int *) MK_FP(
   for (i=0; i<26; i++)
      screen[i] = 0x0700 + ('a' + i);
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

• Microsoft C runtime (search)

These are search links, not yet checked by hand.

Stable link: /3.1/dos.h/FP_OFF/ · short form /3.1/FP_OFF/