bool read_command()
{
if (scanf("%s", cmd) != 1 || cmd[0] != '.') return false;
if (cmd[1] == 'E') { do_eop(); return true; }
char font;
int row, col;
scanf(" %*c%c %d", &font, &row);
if (cmd[1] == 'P') scanf("%d", &col);
scanf(" |%[^|]|", str);
int width = (font == '1' ? 1 : 6) * strlen(str);
if (cmd[1] == 'L') col = 1;
else if (cmd[1] == 'R') col = 61 - width;
else if (cmd[1] == 'C') col = 31 - width/2;
if (font == '1') do_font1(row-1, col-1);
else if (font == '5') do_font5(row-1, col-1);
return true;
}
int vt_putch(struct vt_file *f, int c)
{
struct vt *vtptr;
if (!initialized) return -1;
if (!f || !(vtptr = f->vtptr)) return -1;
if (is_threading()) {
spinl_lock(&vtptr->writelock);
}
if (vtptr->scroll != 0) {
vtptr->scroll = 0;
vt_scroll(0);
}
if (0) {}
else if (c >= ' ') { /* printable character */
vt_scroll_if_needed(f);
if (vtptr->index == cur_vt) {
if(driverstream){
char cc[2];
cc[0] = c;
cc[1] = f->color;
fwrite(cc, 1, 2, driverstream);
}
else{
*(char*)(0xB8000 + vtptr->cy * 160 + vtptr->cx * 2) = c;
*(char*)(0xB8000 + vtptr->cy * 160 + vtptr->cx * 2 + 1) = 0x7;
}
}
if(vtptr->buffer && initialized) {
*(vtptr->buffer + vtptr->bufsize - (driverinfo.h*driverinfo.w*2) + vtptr->cy * (driverinfo.w*2) + vtptr->cx * 2) = c;
*(vtptr->buffer + vtptr->bufsize - (driverinfo.h*driverinfo.w*2) + vtptr->cy * (driverinfo.w*2) + vtptr->cx * 2 + 1) = f->color;
}
vtptr->cx++;
}
else if (c == '\n') { /* new line */
vtptr->cx = 0;
vt_scroll_if_needed(f);
vtptr->cy++;
vt_update_cursor();
}
else if (c == '\r') { /* return */
vtptr->cx = 0;
vt_update_cursor();
}
else if (c == '\t') { /* tab */
vtptr->cx = (vtptr->cx + 8) & ~7;
vt_update_cursor();
}
else if (c == '\b') { /* backspace */
if (vtptr->cx > 0) {
vtptr->cx--;
} else {
vtptr->cx = (driverinfo.w) - 1;
vtptr->cy--;
}
vt_update_cursor();
}
if (driverstream) {
if (vtptr->cx >= (driverinfo.w)) {
vtptr->cx = 0;
vtptr->cy++;
}
}
else {
if (vtptr->cx >= 80) {
vtptr->cx = 0;
vtptr->cy++;
}
}
if (is_threading()) {
spinl_unlock(&vtptr->writelock);
}
do_eop();
return 0;
}