Added reset_buffer()

README.md

@@ -265,6 +265,9 @@ In addition to the Lua API tio makes the following functions available:
         help to make the lines physically switch as simultaneously as possible.
         This may solve timing issues on some platforms.
 
+  reset_buffer()
+        Flush the internal ring buffer.
+
   Note: Line can be any of DTR, RTS, CTS, DSR, CD, RI
 ```
 

man/tio.1.in

@@ -401,6 +401,8 @@ Set tty line state configuration to low.
 Apply tty line state configuration. Using the line state configuration API
 instead of high()/low() will help to make the lines physically switch as
 simultaneously as possible. This may solve timing issues on some platforms.
+.IP "\fBreset_buffer()"
+Flush the internal ring buffer.
 
 .TP 0n
 Note: Line can be any of DTR, RTS, CTS, DSR, CD, RI

src/script.c

@@ -256,6 +256,14 @@ bool match_regex(regex_t *regex)
     return false;
 }
 
+// lua: reset_buffer()
+static int reset_buffer(lua_State *L)
+{
+    (void)L;
+    buffer_size = 0;
+    return 1;
+}
+
 // lua: expect(string, timeout)
 static int expect(lua_State *L)
 {
@@ -352,6 +360,7 @@ static const struct luaL_Reg tio_lib[] =
     { "modem_send", modem_send},
     { "send", send},
     { "expect", expect},
+    { "reset_buffer", reset_buffer},
     { "exit", exit_},
     {NULL, NULL}
 };