/**
* Read at most n characters from the FIFO into a window
*
* @v *win window in which to echo input
* @v *str pointer to string in which to store result
* @v n maximum number of characters to read into string (inc. NUL)
* @ret rc return status code
*/
int wgetnstr ( WINDOW *win, char *str, int n ) {
char *_str;
int c;
if ( n == 0 ) {
*str = '\0';
return OK;
}
_str = str;
while ( ( c = _wgetc( win ) ) != ERR ) {
/* termination enforcement - don't let us go past the
end of the allocated buffer... */
if ( n == 0 && ( c >= 32 && c <= 126 ) ) {
_wcursback( win );
wdelch( win );
} else {
if ( c >= 32 && c <= 126 ) {
*(_str++) = c; n--;
} else {
switch(c) {
case KEY_LEFT :
case KEY_BACKSPACE :
_wcursback( win );
wdelch( win );
break;
case KEY_ENTER :
*_str = '\0';
return OK;
default :
beep();
break;
}
}
}
}
return ERR;
}
/**
* Pop a character from the FIFO into a window
*
* @v *win window in which to echo input
* @ret c char from input stream
*/
int wgetch ( WINDOW *win ) {
int c;
c = _wgetc( win );
if ( m_echo ) {
if ( c >= KEY_MIN ) {
switch(c) {
case KEY_LEFT :
case KEY_BACKSPACE :
_wcursback( win );
wdelch( win );
break;
default :
beep();
break;
}
} else {
_wputch( win, (chtype)( c | win->attrs ), WRAP );
}
}
return c;
}
/**
* Delete character under the cursor in a window
*
* @v *win subject window
* @ret rc return status code
*/
int wdelch ( WINDOW *win ) {
_wputc( win, ' ', NOWRAP );
_wcursback( win );
return OK;
}
