From ee56d1280d022a84870603378f0512ac3cabeba2 Mon Sep 17 00:00:00 2001
From: Davis C <davisclaib@gmail.com>
Date: Wed, 17 Apr 2024 09:21:20 -0500
Subject: [PATCH] Added `reset_buffer()`

---
 README.md    | 3 +++
 man/tio.1.in | 2 ++
 src/script.c | 9 +++++++++
 3 files changed, 14 insertions(+)

diff --git a/README.md b/README.md
index f084d0e..bd38050 100644
--- a/README.md
+++ b/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
 ```
 
diff --git a/man/tio.1.in b/man/tio.1.in
index 17871f1..ead3967 100644
--- a/man/tio.1.in
+++ b/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
diff --git a/src/script.c b/src/script.c
index 6b99ec2..410085a 100644
--- a/src/script.c
+++ b/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}
 };