From 9d15984ebb9dab26de18a5ed633f23ad869af48f Mon Sep 17 00:00:00 2001
From: "B. Watson" <urchlay@slackware.uk>
Date: Fri, 5 Jan 2024 00:59:29 -0500
Subject: Allow quit in error state, don't save bad value in config.

---
 input.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/input.c b/input.c
index 90b6232..718b7cd 100644
--- a/input.c
+++ b/input.c
@@ -24,8 +24,8 @@ char input_buf[MAXIN];
 int iptr;
 double value, saved, stored=0;
 
-void paste();
-void copy();
+void paste(void);
+void copy(void);
 
 void bell(void) {
 	if(!quiet)
@@ -85,6 +85,7 @@ show_value()
     set_string("Err");
     bell();
     showing_err = 1;
+	 value = 0; /* so it doesn't get saved on exit! */
     return;
   }
 
@@ -237,9 +238,18 @@ key(char c)
 
   feclearexcept(FE_ALL_EXCEPT);
 
-  if(showing_err && c != 27 && c != 'C') {
-    bell();
-    return;
+  if(showing_err) {
+    switch(c) {
+      /* list the keys that should be still active in error state */
+      case 27:
+      case 'C':
+      case 'Q':
+      case 17:
+        break;
+      default:
+        bell();
+        return;
+	 }
   }
 
   switch (c)
@@ -489,13 +499,13 @@ static char *bmap[] = {
 };
 
 void
-copy()
+copy(void)
 {
   XSetSelectionOwner(display, XA_PRIMARY, window, event.xbutton.time);
 }
 
 void
-paste()
+paste(void)
 {
   XConvertSelection(display, XA_PRIMARY, XA_STRING, paste_atom, window,
 		    event.xbutton.time);
-- 
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