int putch(int c)
{
int row, col;
ScreenGetCursor(&row, &col);
/* first, handle the character */
if (c == '\n')
{
row++;
}
else if (c == '\r')
{
col = txinfo.winleft - 1;
}
else if (c == '\b')
{
if (col > txinfo.winleft - 1)
col--;
else if (row > txinfo.wintop -1)
{
/*
* Turbo-C ignores this case; we are smarter.
*/
row--;
col = txinfo.winright-1;
}
}
else if (c == 0x07)
bell();
else {
/* short val = c | (ScreenAttrib << 8); */
/* puttext(col + 1, row + 1, col + 1, row + 1, &val); */
ScreenPutChar(c, ScreenAttrib, col, row);
col++;
}
/* now, readjust the window */
if (col >= txinfo.winright) {
col = txinfo.winleft - 1;
row++;
}
if (row >= txinfo.winbottom) {
/* scrollwin(0, txinfo.winbottom - txinfo.wintop, 1); */
if (_wscroll)
{
ScreenSetCursor(txinfo.wintop-1,0);
delline();
}
row--;
}
ScreenSetCursor(row, col);
txinfo.cury = row - txinfo.wintop + 2;
txinfo.curx = col - txinfo.winleft + 2;
return c;
}
int wherey(void)
{
int row, col;
ScreenGetCursor(&row, &col);
return row - txinfo.wintop + 2;
}
int wherex(void)
{
int row, col;
ScreenGetCursor(&row, &col);
return col - txinfo.winleft + 2;
}
static void
describe_PcBiosScreen (ScreenDescription *description) {
int row, column;
description->rows = ScreenRows();
description->cols = ScreenCols();
ScreenGetCursor(&row, &column);
description->posx = column;
description->posy = row;
description->number = 1;
}
void delline(void)
{
int row, col, left, right, nbytes, bot, fill;
ScreenGetCursor(&row, &col);
left = txinfo.winleft - 1;
right = txinfo.winright - 1;
nbytes = (right-left+1)*2;
bot = txinfo.winbottom-1;
fill = ' ' | (ScreenAttrib << 8);
while(row < bot)
{
movedata(_go32_conventional_mem_selector(), VIDADDR(row+1, left),
_go32_conventional_mem_selector(), VIDADDR(row, left),
nbytes);
row++;
}
fillrow(bot,left,right,fill);
}
static void _gettextinfo(struct text_info *t)
{
int row, col;
t->winleft = t->wintop = 1;
t->winright = t->screenwidth = ScreenCols();
t->winbottom = t->screenheight = ScreenRows();
ScreenAttrib = t->attribute = t->normattr = get_screenattrib();
t->currmode = getvideomode();
ScreenGetCursor(&row, &col);
t->curx = col+1;
t->cury = row+1;
#if DBGGTINFO
printf("left=%2d,right=%2d,top=%2d,bottom=%2d\n",t->winleft,
t->winright,t->wintop,t->winbottom);
printf("scrht=%2d,scrwid=%2d,norm=%2x,mode=%2d,x=%2d,y=%2d\n",
t->screenheight, t->screenwidth, t->normattr, t->currmode,
t->curx, t->cury);
#endif
}
int cputs(const char *s)
{
int row, col,c;
const unsigned char *ss = (const unsigned char *)s;
short *viaddr;
short sa = ScreenAttrib << 8;
ScreenGetCursor(&row, &col);
viaddr = (short *)VIDADDR(row,col);
/*
* Instead of just calling putch; we do everything by hand here,
* This is much faster. We don't move the cursor after each character,
* only after the whole string is written, because ScreenSetCursor
* needs to long because of switching to real mode needed with djgpp.
* You won't recognize the difference.
*/
while ((c = *ss++))
{
/* first, handle the character */
if (c == '\n')
{
row++;
viaddr += txinfo.screenwidth;
}
else if (c == '\r')
{
col = txinfo.winleft - 1;
viaddr = (short *)VIDADDR(row,col);
}
else if (c == '\b')
{
if (col > txinfo.winleft-1)
{
col--;
viaddr--;
}
else if (row > txinfo.wintop -1)
{
/*
* Turbo-C ignores this case. We want to be able to
* edit strings with backspace in gets after
* a linefeed, so we are smarter
*/
row--;
col = txinfo.winright-1;
viaddr = (short *)VIDADDR(row,col);
}
}
else if (c == 0x07)
bell();
else {
short q = c | sa;
dosmemput(&q, 2, (int)viaddr);
viaddr++;
col++;
}
/* now, readjust the window */
if (col >= txinfo.winright) {
col = txinfo.winleft - 1;
row++;
viaddr = (short *)VIDADDR(row,col);
}
if (row >= txinfo.winbottom) {
ScreenSetCursor(txinfo.wintop-1,0); /* goto first line in window */
delline(); /* and delete it */
row--;
viaddr -= txinfo.screenwidth;
}
}
ScreenSetCursor(row, col);
txinfo.cury = row - txinfo.wintop + 2;
txinfo.curx = col - txinfo.winleft + 2;
return(*(--ss));
}
static void getwincursor(int *row, int *col)
{
ScreenGetCursor(row, col);
}