v4.0/src/INC/SYSVAR.C

   1 /* return the system variables in sysVars */
   2
   3 #include "sysvar.h"
   4 #include <dos.h>
   5 #include "jointype.h"
   6
   7 GetVars(pSVars)
   8 struct sysVarsType *pSVars ;
   9 {
  10         struct sysVarsType far *vptr ;
  11         int i ;
  12
  13         union REGS ir ;
  14         register union REGS *iregs = &ir ;      /* Used for DOS calls      */
  15         struct SREGS syssegs ;
  16
  17         iregs->h.ah = GETVARS ;                 /* Function 0x52           */
  18         intdosx(iregs, iregs, &syssegs) ;
  19
  20         *(long *)(&vptr) = (((long)syssegs.es) << 16)+(iregs->x.bx & 0xffffL) ;
  21
  22         for (i=0 ; i <= sizeof(*pSVars) ; i++)
  23                 *((char *)pSVars+i) = *((char far *)vptr+i) ;
  24
  25 }
  26
  27
  28
  29
  30 PutVars(pSVars)
  31 struct sysVarsType *pSVars ;
  32 {
  33         struct sysVarsType far *vptr ;
  34         int i ;
  35
  36         union REGS ir ;
  37         register union REGS *iregs = &ir ;      /* Used for DOS calls      */
  38         struct SREGS syssegs ;
  39
  40         iregs->h.ah = GETVARS ;                 /* Function 0x52           */
  41         intdosx(iregs, iregs, &syssegs) ;
  42
  43         *(long *)(&vptr) = (((long)syssegs.es) << 16)+(iregs->x.bx & 0xffffL) ;
  44
  45         for (i=0 ; i <= sizeof(*pSVars) ; i++)
  46                 *((char far *)vptr+i) = *((char *)pSVars+i) ;
  47
  48 }
  49 \1a