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>

diff --git a/top/top.c b/top/top.c
index 14794e5e552aebf0491872f1f74e36ed62b02dd4..394b8a94fe7f0178433a4779f648d5c19677ad07 100644 (file)
--- a/top/top.c
+++ b/top/top.c
@@ -2700,6 +2700,7 @@ 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];
@@ -2719,6 +2720,7 @@ 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:
@@ -2734,8 +2736,7 @@ static void insp_mkrow_utf8 (int col, int row) {
                doPUT(buf4)
                break;
             default:
-               buf1[0] = ' ';
-               doPUT(buf1)
+               mkNUL
                break;
          }
       } else {
@@ -2749,6 +2750,7 @@ static void insp_mkrow_utf8 (int col, int row) {
  #undef maxSZ
  #undef mkFND
  #undef mkCTL
+ #undef mkNUL
  #undef doPUT
 } // end: insp_mkrow_utf8