X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Ftinfo%2Flib_tgoto.c;fp=ncurses%2Ftinfo%2Flib_tgoto.c;h=4173d74efcddac2ab79791ce5125cbf19a8405f8;hp=292b2eb2698ca7ffae63a4ddfe9b41e4bbd52a36;hb=336aa0803853f7961dd31f1e35cd688d861ffd64;hpb=5f288254c618ae86f3811f2797e4d942061c9101

diff --git a/ncurses/tinfo/lib_tgoto.c b/ncurses/tinfo/lib_tgoto.c
index 292b2eb2..4173d74e 100644
--- a/ncurses/tinfo/lib_tgoto.c
+++ b/ncurses/tinfo/lib_tgoto.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 2000-2012,2018 Free Software Foundation, Inc.              *
+ * Copyright (c) 2000-2018,2019 Free Software Foundation, Inc.              *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -35,7 +35,7 @@
 #include <ctype.h>
 #include <termcap.h>
 
-MODULE_ID("$Id: lib_tgoto.c,v 1.17 2018/04/07 21:11:48 tom Exp $")
+MODULE_ID("$Id: lib_tgoto.c,v 1.18 2019/10/26 22:43:48 tom Exp $")
 
 #if !PURE_TERMINFO
 static bool
@@ -125,7 +125,14 @@ tgoto_internal(const char *string, int x, int y)
 			*value += 1;
 			need_BC = TRUE;
 		    } else {
-			*value = 0200;	/* tputs will treat this as \0 */
+			/* tputs will pretend this is \0, which will almost
+			 * always work since ANSI-compatible terminals ignore
+			 * the character.  ECMA-48 does not document a C1
+			 * control for this value.  A few (obsolete) terminals
+			 * can use this value in special cases, such as cursor
+			 * addressing using single-byte coordinates.
+			 */
+			*value = 0200;
 		    }
 		}
 		result[used++] = (char) *value++;