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/*
* dos.c
* Copyright (C) 2004 A.J. van Os; Released under GNU GPL
*
* Description:
* DOS only functions
*/
#if defined(__DJGPP__)
#define _NAIVE_DOS_REGS 1
#endif /* __DJGPP__ */
#include <dos.h>
#include <string.h>
#include "antiword.h"
/*
* iGetVersion - get the version of DOS
*
* Return the DOS version * 100 or -1 incase of error
*/
static int
iGetVersion(void)
{
union REGS uRegs;
memset(&uRegs, 0, sizeof(uRegs));
uRegs.h.ah = 0x30;
uRegs.h.al = 0x00;
_doserrno = 0;
intdos(&uRegs, &uRegs);
if (uRegs.x.cflag != 0) {
DBG_DEC(uRegs.x.cflag);
DBG_DEC(_doserrno);
return -1;
}
DBG_DEC(uRegs.h.al);
DBG_DEC(uRegs.h.ah);
return uRegs.h.al * 100 + uRegs.h.ah;
} /* end of iGetVersion */
/*
* iGetCodepage - get the DOS codepage
*
* Returns the number of the active codepage (cp437 is DOS ASCII)
*/
int
iGetCodepage(void)
{
union REGS uRegs;
/* DOS function 0x66 first appeared in DOS 3.3 */
if (iGetVersion() < 330) {
return 437;
}
memset(&uRegs, 0, sizeof(uRegs));
uRegs.h.ah = 0x66;
uRegs.h.al = 0x01;
_doserrno = 0;
intdos(&uRegs, &uRegs);
if (uRegs.x.cflag != 0) {
DBG_DEC(uRegs.x.cflag);
DBG_DEC(_doserrno);
return 437;
}
DBG_DEC(uRegs.x.bx);
DBG_DEC(uRegs.x.dx);
return uRegs.x.bx;
} /* end of iGetCodepage */
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