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- /*
- ** PRTSTAT.H - Header file for PRTSTAT.C
- */
-
- #ifndef PRTSTAT_H
- #define PRTSTAT_H
-
- struct PrStatus {
- unsigned int timeout : 1;
- unsigned int unused : 2;
- unsigned int IOerror : 1;
- unsigned int selected : 1;
- unsigned int paperout : 1;
- unsigned int ack : 1;
- unsigned int notbusy : 1;
- };
-
- int prtstat(unsigned int);
-
- #endif
-
- /*** End of PRTSTAT.H *******************************************************/
-
- /*
- ** PRTSTAT.C - Determine printer status
- **
- ** public domain by Bob Stout
- */
-
- #include <dos.h>
-
- #ifndef PRTSTAT_H
- #include "prtstat.h"
- #endif
-
- /*
- ** prtstat() - Call with printer number (0 = LPT1, 1 = LPT2, 2 = LPT3)
- **
- ** Returns status which can be mapped to a PrStatus struct
- */
-
- int prtstat(unsigned int printer_no)
- {
- union REGS regs;
-
- regs.h.ah = 2;
- regs.x.dx = printer_no;
- int86(0x17, ®s, ®s);
- return regs.h.ah;
- }
-
- #ifdef TEST
-
- #include <stdio.h>
-
- #define show(x) printf(#x" is %strue (LPT1)\n", mystat.x ? "" : "not ");
-
- void main(void)
- {
- struct PrStatus mystat;
-
- *((int *)&mystat) = prtstat(0);
- show(notbusy);
- show(selected);
- show(paperout);
- }
-
- #endif
-