[src/trunk]: src/bin/sh Redo 1.65 in a simpler way. This is the bit rot avo...

[kre <kre%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/cfae780d7ca4
branches:  trunk
changeset: 996028:cfae780d7ca4
user:      kre <kre%NetBSD.org@localhost>
date:      Wed Jan 16 07:14:17 2019 +0000

description:
Redo 1.65 in a simpler way.   This is the bit rot avoidance code
that is #if 0'd and (still) has never been compiled (most likely
never will be.)

While here, in the same uncompiled code, deal with line number
counting.   Whether this is correct depends upon how this code
is used, and as it never is (and never has been since line numbers
first started being counted), this is somewhat speculative, but
it seems likely to be the correct way to handle things.

NFC (this code is still all #if 0).

diffstat:

 bin/sh/input.c |  16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diffs (43 lines):

diff -r 9132e9a4cdda -r cfae780d7ca4 bin/sh/input.c
--- a/bin/sh/input.c    Wed Jan 16 05:19:30 2019 +0000
+++ b/bin/sh/input.c    Wed Jan 16 07:14:17 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: input.c,v 1.68 2019/01/15 14:23:56 kre Exp $   */
+/*     $NetBSD: input.c,v 1.69 2019/01/16 07:14:17 kre Exp $   */
 
 /*-
  * Copyright (c) 1991, 1993
@@ -37,7 +37,7 @@
 #if 0
 static char sccsid[] = "@(#)input.c    8.3 (Berkeley) 6/9/95";
 #else
-__RCSID("$NetBSD: input.c,v 1.68 2019/01/15 14:23:56 kre Exp $");
+__RCSID("$NetBSD: input.c,v 1.69 2019/01/16 07:14:17 kre Exp $");
 #endif
 #endif /* not lint */
 
@@ -145,18 +145,18 @@
 
        while (--nleft > 0) {
                c = pgetc_macro();
+               if (c == PFAKE)         /* consecutive PFAKEs is impossible */
+                       c = pgetc_macro();
                if (c == PEOF) {
                        if (p == line)
                                return NULL;
                        break;
                }
-               if (c == PFAKE) {
-                       ++nleft;
-                       continue;
+               *p++ = c;
+               if (c == '\n') {
+                       plinno++;
+                       break;
                }
-               *p++ = c;
-               if (c == '\n')
-                       break;
        }
        *p = '\0';
        return line;