[src/trunk]: src/usr.bin/make make(1): replace large switch with if-else in C...

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

details:   https://anonhg.NetBSD.org/src/rev/4a1e0ff4cbfd
branches:  trunk
changeset: 945997:4a1e0ff4cbfd
user:      rillig <rillig%NetBSD.org@localhost>
date:      Fri Nov 13 07:35:27 2020 +0000

description:
make(1): replace large switch with if-else in Cond_EvalLine

diffstat:

 usr.bin/make/cond.c |  23 ++++++++---------------
 1 files changed, 8 insertions(+), 15 deletions(-)

diffs (44 lines):

diff -r 192469eb7c45 -r 4a1e0ff4cbfd usr.bin/make/cond.c
--- a/usr.bin/make/cond.c       Fri Nov 13 06:19:27 2020 +0000
+++ b/usr.bin/make/cond.c       Fri Nov 13 07:35:27 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cond.c,v 1.211 2020/11/13 06:19:27 rillig Exp $        */
+/*     $NetBSD: cond.c,v 1.212 2020/11/13 07:35:27 rillig Exp $        */
 
 /*
  * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
@@ -94,7 +94,7 @@
 #include "dir.h"
 
 /*     "@(#)cond.c     8.2 (Berkeley) 1/2/94"  */
-MAKE_RCSID("$NetBSD: cond.c,v 1.211 2020/11/13 06:19:27 rillig Exp $");
+MAKE_RCSID("$NetBSD: cond.c,v 1.212 2020/11/13 07:35:27 rillig Exp $");
 
 /*
  * The parsing of conditional expressions is based on this grammar:
@@ -1167,19 +1167,12 @@
            }
 
            state = cond_states[cond_depth];
-           switch (state) {
-           case SEARCH_FOR_ELIF:
-               state = ELSE_ACTIVE;
-               break;
-           case ELSE_ACTIVE:
-           case SKIP_TO_ENDIF:
-               Parse_Error(PARSE_WARNING, "extra else");
-               /* FALLTHROUGH */
-           default:
-           case IF_ACTIVE:
-           case SKIP_TO_ELSE:
-               state = SKIP_TO_ENDIF;
-               break;
+           if (state == SEARCH_FOR_ELIF) {
+               state = ELSE_ACTIVE;
+           } else {
+               if (state == ELSE_ACTIVE || state == SKIP_TO_ENDIF)
+                   Parse_Error(PARSE_WARNING, "extra else");
+               state = SKIP_TO_ENDIF;
            }
            cond_states[cond_depth] = state;
            return state <= ELSE_ACTIVE ? COND_PARSE : COND_SKIP;