Character checks, minor cleanup

src/lib.rs

@@ -68,9 +68,7 @@ cfg_if::cfg_if! {
 						return format!("\r\n{}", daisy_prompt(state));
 					}
 
-					if in_str.trim() == "quit" {
-						return "[quit]".to_string();
-					} else {
+
 					let r = crate::do_string( unsafe { &mut (*state).context }, &in_str);
 
 					match r {
@@ -78,7 +76,6 @@ cfg_if::cfg_if! {
 							out += t;
 						}
 					}
-					}
 				},
 
 				"\x7F" => { unsafe { (*state).promptbuffer.backspace(); } },
@@ -91,7 +88,20 @@ cfg_if::cfg_if! {
 				//'\x04' | '\x03'
 				//=> { break 'outer; },
 
-				_ => { unsafe { (*state).promptbuffer.add_char(s.chars().next().unwrap()); } },
+				// Only process sane characters
+
+				_ => {
+					let c = s.chars().next().unwrap();
+					match c {
+						'a'..='z' | 'A'..='Z' | '0'..='9'
+						|'!'|'@'|'#'|'$'|'%'|'^'|'&'|'*'|'('|')'
+						|'?'|'~'|','|'.'|'['|']'
+						|'<'|'>'|'/'|'_'|'-'|':'|'|'|'='|'+'|';'
+						=> { unsafe { (*state).promptbuffer.add_char(c); } },
+
+						_ => {}
+					}
+				},
 			};
 			
 			let t = unsafe { (*state).promptbuffer.write_prompt(&mut (*state).context) };