[src/trunk]: src/usr.bin/xlint/lint1 lint: reduce clutter in parsing preproce...

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

details:   https://anonhg.NetBSD.org/src/rev/2d3e2e025950
branches:  trunk
changeset: 374177:2d3e2e025950
user:      rillig <rillig%NetBSD.org@localhost>
date:      Fri Apr 07 11:08:31 2023 +0000

description:
lint: reduce clutter in parsing preprocessor lines

No functional change.

diffstat:

 usr.bin/xlint/lint1/lex.c |  16 +++++++---------
 1 files changed, 7 insertions(+), 9 deletions(-)

diffs (45 lines):

diff -r ebb61a7d7d9f -r 2d3e2e025950 usr.bin/xlint/lint1/lex.c
--- a/usr.bin/xlint/lint1/lex.c Fri Apr 07 10:42:28 2023 +0000
+++ b/usr.bin/xlint/lint1/lex.c Fri Apr 07 11:08:31 2023 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: lex.c,v 1.156 2023/04/05 20:17:30 rillig Exp $ */
+/* $NetBSD: lex.c,v 1.157 2023/04/07 11:08:31 rillig Exp $ */
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
@@ -38,7 +38,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID)
-__RCSID("$NetBSD: lex.c,v 1.156 2023/04/05 20:17:30 rillig Exp $");
+__RCSID("$NetBSD: lex.c,v 1.157 2023/04/07 11:08:31 rillig Exp $");
 #endif
 
 #include <ctype.h>
@@ -940,21 +940,19 @@ parse_line_directive_flags(const char *p
        *is_system = false;
 
        while (*p != '\0') {
-               const char *word_start, *word_end;
-
                while (ch_isspace(*p))
                        p++;
 
-               word_start = p;
+               const char *word = p;
                while (*p != '\0' && !ch_isspace(*p))
                        p++;
-               word_end = p;
+               size_t len = (size_t)(p - word);
 
-               if (word_end - word_start == 1 && word_start[0] == '1')
+               if (len == 1 && word[0] == '1')
                        *is_begin = true;
-               if (word_end - word_start == 1 && word_start[0] == '2')
+               if (len == 1 && word[0] == '2')
                        *is_end = true;
-               if (word_end - word_start == 1 && word_start[0] == '3')
+               if (len == 1 && word[0] == '3')
                        *is_system = true;
                /* Flag '4' is only interesting for C++. */
        }