From a532338ca642ed386270047aefc56ed11ef120d3 Mon Sep 17 00:00:00 2001
From: Robin Haberkorn <robin.haberkorn@googlemail.com>
Date: Sat, 24 Nov 2012 18:19:52 +0100
Subject: fixed command line termination

 * do it only in start state: so double escapes in strings do not cause a termination and an empty string may be specified
 * clear arithmetic stacks on line termination
---
 cmdline.cpp   |  7 +++++--
 expressions.h | 13 +++++++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/cmdline.cpp b/cmdline.cpp
index deeeed3..fd37650 100644
--- a/cmdline.cpp
+++ b/cmdline.cpp
@@ -7,6 +7,7 @@
 
 #include "sciteco.h"
 #include "interface.h"
+#include "expressions.h"
 #include "parser.h"
 #include "qbuffers.h"
 #include "goto.h"
@@ -128,7 +129,8 @@ process_edit_cmd(gchar key)
 		break;
 
 	case '\x1B':
-		if (cmdline && cmdline[cmdline_len - 1] == '\x1B') {
+		if (States::current == &States::start &&
+		    cmdline && cmdline[cmdline_len - 1] == '\x1B') {
 			if (Goto::skip_label) {
 				interface.msg(Interface::MSG_ERROR,
 					      "Label \"%s\" not found",
@@ -141,9 +143,10 @@ process_edit_cmd(gchar key)
 				exit(EXIT_SUCCESS);
 			}
 
-			interface.ssm(SCI_EMPTYUNDOBUFFER);
 			undo.clear();
+			interface.ssm(SCI_EMPTYUNDOBUFFER);
 			Goto::table->clear();
+			expressions.clear();
 
 			*cmdline = '\0';
 			macro_pc = 0;
diff --git a/expressions.h b/expressions.h
index 5d2aa0c..a441e90 100644
--- a/expressions.h
+++ b/expressions.h
@@ -100,6 +100,12 @@ public:
 	{
 		return top[-index];
 	}
+
+	inline void
+	clear(void)
+	{
+		top = stack;
+	}
 };
 
 /*
@@ -172,6 +178,13 @@ public:
 
 	int find_op(Operator op);
 
+	inline void
+	clear(void)
+	{
+		numbers.clear();
+		operators.clear();
+	}
+
 private:
 	void calc(void);
 
-- 
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