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/*
** ANSILOAD.C - tries to detect if an ANSI-style driver is loaded
**
** public domain by Bob Jarvis
*/
#include <stdio.h>
#include <dos.h>
typedef enum {FALSE, TRUE} LOGICAL;
void goto_rc(int row, int col)
{
union REGS regs;
regs.h.ah = 2;
regs.h.bh = 0; /* assumes we're using video page 0 */
regs.h.dh = (unsigned char)row;
regs.h.dl = (unsigned char)col;
int86(0x10, ®s, ®s);
}
void get_rc(int *row, int *col)
{
union REGS regs;
regs.h.ah = 3;
regs.h.bh = 0; /* again, assume video page 0 */
int86(0x10, ®s, ®s);
*row = regs.h.dh;
*col = regs.h.dl;
}
int is_ansi_loaded(void)
{
int save_r, save_c;
int new_r, new_c;
int isloaded;
get_rc(&save_r, &save_c);
goto_rc(15,15);
fputs("\x1B[0;0H", stderr);
get_rc(&new_r, &new_c);
if(new_r == 0 && new_c == 0)
isloaded = TRUE;
else
{
isloaded = FALSE;
fputs("\b\b\b\b\b\b \b\b\b\b\b\b", stderr);
}
goto_rc(save_r, save_c);
return isloaded;
}
void main(void)
{
if(is_ansi_loaded())
puts("ANSI.SYS is loaded");
else puts("ANSI.SYS is NOT loaded");
}
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