From b4c06fc38ae74e1c58cd2bf9866e65a26a412696 Mon Sep 17 00:00:00 2001
From: "B. Watson" <urchlay@slackware.uk>
Date: Wed, 10 Jan 2024 09:38:27 -0500
Subject: Add twos complement, center-click anywhere to paste.

---
 input.c | 33 ++++++++++++++++++++++++++-------
 1 file changed, 26 insertions(+), 7 deletions(-)

(limited to 'input.c')

diff --git a/input.c b/input.c
index 62ad271..47a6f59 100644
--- a/input.c
+++ b/input.c
@@ -403,6 +403,16 @@ key(char c)
     show_value();
     break;
 
+  case '@':	/* Two's complement */
+    end_number();
+    {
+      unsigned int i = ((unsigned int)value) & 0xffffffff;
+      value = ~i + 1;
+    }
+    saved = value;
+    show_value();
+    break;
+
   case '<': /* SHL by one bit only */
 /* Modified by Keith Meehl to fix bit shift bug*/
     end_number();
@@ -525,6 +535,13 @@ complete_paste(unsigned char *s, int n)
 void
 button(int b, int x, int y)
 {
+  char k;
+
+  if(b == 2) {
+	  paste();
+	  return;
+  }
+
   x = (x-2)/(24 * scale_factor);
   if (x < 0) x = 0;
   if (x > 4) x = 4;
@@ -532,17 +549,19 @@ button(int b, int x, int y)
   if (y < 0) y = 0;
   if (y > 8) y = 8;
 
-  if (bmap[y][x] == 27 && b == 3)
+  k = bmap[y][x];
+
+  if (k == 27 && b == 3)
     exit(0);
 
-  if (bmap[y][x] == 'P' && b == 1)
+  if (k == 'P' && b == 1)
     copy();
-  if (bmap[y][x] == 'P' && b != 1)
+  else if (k == 'P' && b != 1)
     paste();
-
-  if(bmap[y][x] == '/' && b != 1)
+  else if(k == '/' && b != 1)
     key('%');
+  else if(k == '~' && b != 1)
+    key('@');
   else
-    key(bmap[y][x]);
-  /* printf("bmap[%i][%i] and b=%i\n", y, x, b); */
+    key(k);
 }
-- 
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