From d5a9965cdee5c1dffa251d273212a26f09de0fcc Mon Sep 17 00:00:00 2001
From: Jim Warner <james.warner@comcast.net>
Date: Sun, 1 Oct 2017 17:59:59 -0500
Subject: [PATCH] top: plug a small potential hole in multi-byte support

Unlike the insp_mkrow_raw function the insp_mkrow_utf8
routine is not equipped to print non-ctl, non-printing
characters like '<7f>'. However, technically that very
value currently slips through the cracks. So with this
patch top will now print a space in the unlikely event
a character with the value of 127 is ever encountered.

Signed-off-by: Jim Warner <james.warner@comcast.net>
---
 top/top.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/top/top.c b/top/top.c
index d0b8bdc0..aef95ead 100644
--- a/top/top.c
+++ b/top/top.c
@@ -3157,6 +3157,7 @@ static void insp_mkrow_utf8 (int col, int row) {
  #define mkCTL { if ((to += 2) <= Screen_cols) \
     PUTT("%s^%c%s", Curwin->capclr_msg, uch + '@', Caps_off); }
 #endif
+ #define mkNUL { buf1[0] = ' '; doPUT(buf1) }
  #define doPUT(buf) if (++to <= Screen_cols) putp(buf);
    static char buf1[2], buf2[3], buf3[4], buf4[5];
    char tline[BIGBUFSIZ];
@@ -3176,6 +3177,7 @@ static void insp_mkrow_utf8 (int col, int row) {
             case 1:
                if (uch == '\n')   break;
                else if (uch < 32) mkCTL
+               else if (uch == 127) mkNUL
                else { buf1[0] = uch; doPUT(buf1) }
                break;
             case 2:
@@ -3191,8 +3193,7 @@ static void insp_mkrow_utf8 (int col, int row) {
                doPUT(buf4)
                break;
             default:
-               buf1[0] = ' ';
-               doPUT(buf1)
+               mkNUL
                break;
          }
       } else {
@@ -3206,6 +3207,7 @@ static void insp_mkrow_utf8 (int col, int row) {
  #undef maxSZ
  #undef mkFND
  #undef mkCTL
+ #undef mkNUL
  #undef doPUT
 } // end: insp_mkrow_utf8