From 5127800475f05ad9923ddb511079a44e05e076a6 Mon Sep 17 00:00:00 2001
From: "nethack.allison" <nethack.allison>
Date: Mon, 23 Dec 2002 12:49:56 +0000
Subject: [PATCH] autocomplete fix for win32

The problem with the new autocomplete was tracked down to
be the result of differences between different implementations
of backsp().  The differences go all the way back to the
early MSDOS port by the look of it, and the win32,
and Mac tty ports all seemed to pattern themselves after the
MSDOS port for that routine.  Apparently, it didn't cause any
harm until now.

The problem is that backsp() sends a character sequence
of 0x08, 0x20, 0x08 on at least those ports, where the Unix
tty code only sends 0x08.  So the characters in the new
autocomplete were all being erased from the screen.

This patch only fixes the win32 tty port, so I've left the
conditional code in getline.c for DOS and Mac. I
---
 sys/winnt/nttty.c | 4 ----
 win/tty/getline.c | 4 ++++
 win/tty/wintty.c  | 2 ++
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/sys/winnt/nttty.c b/sys/winnt/nttty.c
index abc5597c3..e73bb4eb5 100644
--- a/sys/winnt/nttty.c
+++ b/sys/winnt/nttty.c
@@ -625,8 +625,6 @@ home()
 void
 backsp()
 {
-	DWORD count;
-
 	GetConsoleScreenBufferInfo(hConOut,&csbi);
 	if (csbi.dwCursorPosition.X > 0)
 		ntcoord.X = csbi.dwCursorPosition.X-1;
@@ -638,8 +636,6 @@ backsp()
 				(currentcolor|currenthilite|currentbackground));
 		colorchange = FALSE;
 	}
-	WriteConsole(hConOut," ",1,&count,0);
-	SetConsoleCursorPosition(hConOut,ntcoord);	
 }
 
 void
diff --git a/win/tty/getline.c b/win/tty/getline.c
index cd0dae225..fded0d3b4 100644
--- a/win/tty/getline.c
+++ b/win/tty/getline.c
@@ -6,6 +6,10 @@
 
 #ifdef TTY_GRAPHICS
 
+#if !defined(MSDOS) && !defined(MAC)
+#define NEWAUTOCOMP
+#endif
+
 #include "wintty.h"
 #include "func_tab.h"
 
diff --git a/win/tty/wintty.c b/win/tty/wintty.c
index a08028887..ce9311e50 100644
--- a/win/tty/wintty.c
+++ b/win/tty/wintty.c
@@ -688,6 +688,8 @@ tty_askname()
 #if defined(MICRO) || defined(WIN32CON)
 # if defined(WIN32CON)
 				backsp();       /* \b is visible on NT */
+				(void) putchar(' ');
+				backsp();
 # else
 #  if defined(MSDOS)
 				if (iflags.grmode) {