// Move cursor left "delta" chars
void term_left( unsigned delta )
{
term_ansi( "%uD", delta );
term_cx += delta;
}
// Move cursor down "delta" lines
void term_down( unsigned delta )
{
term_ansi( "%uB", delta );
term_cy += delta;
}
// Move cursor right "delta" chars
void term_right( unsigned delta )
{
term_ansi( "%uC", delta );
term_cx -= delta;
}
// Move cursor up "delta" lines
void term_up( unsigned delta )
{
term_ansi( "%uA", delta );
term_cy -= delta;
}
// Move cursor to (x, y)
void term_gotoxy( unsigned x, unsigned y )
{
term_ansi( "%u;%uH", y, x );
term_cx = x;
term_cy = y;
}
// Clear to end of line
void term_clreol()
{
term_ansi( "K" );
}
// Clear the screen
void term_clrscr()
{
term_ansi( "2J" );
term_cx = term_cy = 0;
}
/* ----------------------------------------------------------------------- */
int term_read(int fd, char *buf, unsigned int len) {
char c;
int ret;
static unsigned long remain;
if(remain) {
check_remain:
if(len > remain)
len = remain;
byte_copy(buf, len, &term_cmdline.s[term_cmdline.len - remain]);
remain -= len;
if(!remain) {
tcsetattr(fd, TCSANOW, &term_tcattr);
stralloc_zero(&term_cmdline);
}
return len;
}
/* tcsetattr(fd, TCSANOW, &term_tcattr);*/
term_attr(term_input.fd, 1);
prompt_show();
while((ret = buffer_getc(&term_input, &c)) > 0) {
switch(c) {
/* control-c discards the current line */
case 3:
stralloc_zero(&term_cmdline);
/* newline */
case '\n':
term_newline();
remain = term_cmdline.len;
goto check_remain;
/* control-a is HOME */
case 1:
term_home();
break;
/* control-e is END */
case 5:
term_end();
break;
/* control-d is EOF */
case 4:
if(!term_cmdline.len) {
buffer_puts(term_output, "EOF");
buffer_putnlflush(term_output);
ret = 0;
goto fail;
}
break;
/* do the ANSI codes */
case '\033':
term_ansi();
break;
/* backspace */
case 127:
case '\b':
term_backspace();
break;
/* printable chars */
case '\t':
c = ' ';
default:
if(term_insert)
term_insertc(c);
else
term_overwritec(c);
break;
}
}
fail:
return ret;
}