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/*
** GETSEG.C - How to get the memory segment of an object
**
** public domain demo by Bob Stout
*/
#include <stdio.h>
#include <dos.h>
#ifdef __TURBOC__
#define FAR far
#else
#define FAR _far
#endif
#define GetSeg(obj) (unsigned)((unsigned long)(((void FAR *)(obj))) >> 16)
#define GetOfs(obj) (unsigned)((unsigned long)(((void FAR *)(obj))) & 0xffff)
int dummyv = 0;
int dummyf(void)
{
return dummyv;
}
void main(void)
{
struct SREGS sregs;
segread (&sregs);
printf("DS = %04X, CS = %04X\n", sregs.ds, sregs.cs);
#if defined(__ZTC__)
printf("&dummyv = %lp, dummyf = %lp\n\n",
#else
printf("&dummyv = %Fp, dummyf = %Fp\n\n",
#endif
#if defined(__ZTC__) || defined(__TURBOC__)
(int FAR *)&dummyv, (int (FAR *)())dummyf);
#else /* MSC doesn't allow casting near function pointers to far */
(int FAR *)&dummyv, dummyf);
#endif
printf("GetSeg(dummyv) = %04X, GetSeg(dummyf) = %04X\n",
GetSeg(&dummyv), GetSeg(dummyf));
printf("GetOfs(dummyv) = %04X, GetOfs(dummyf) = %04X\n",
GetOfs(&dummyv), GetOfs(dummyf));
}
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