[src/trunk]: src/usr.bin/make make: use more practical data type in RegexReplace

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

details:   https://anonhg.NetBSD.org/src/rev/2f3f6a402725
branches:  trunk
changeset: 379839:2f3f6a402725
user:      rillig <rillig%NetBSD.org@localhost>
date:      Mon Jun 21 18:25:20 2021 +0000

description:
make: use more practical data type in RegexReplace

While size_t is most appropriate for array indexes, make needs to be
compatible with C90, which does not support the %zu printf conversion.
To avoid type casts, use a simple unsigned int here, which is more than
enough for storing a single decimal digit.

No functional change.

diffstat:

 usr.bin/make/var.c |  13 ++++++-------
 1 files changed, 6 insertions(+), 7 deletions(-)

diffs (46 lines):

diff -r 0a96ce6b93ca -r 2f3f6a402725 usr.bin/make/var.c
--- a/usr.bin/make/var.c        Mon Jun 21 18:12:49 2021 +0000
+++ b/usr.bin/make/var.c        Mon Jun 21 18:25:20 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: var.c,v 1.937 2021/06/21 18:12:49 rillig Exp $ */
+/*     $NetBSD: var.c,v 1.938 2021/06/21 18:25:20 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -140,7 +140,7 @@
 #include "metachar.h"
 
 /*     "@(#)var.c      8.3 (Berkeley) 3/19/94" */
-MAKE_RCSID("$NetBSD: var.c,v 1.937 2021/06/21 18:12:49 rillig Exp $");
+MAKE_RCSID("$NetBSD: var.c,v 1.938 2021/06/21 18:25:20 rillig Exp $");
 
 /*
  * Variables are defined using one of the VAR=value assignments.  Their
@@ -1594,7 +1594,7 @@ RegexReplace(const char *replace, SepBuf
             const regmatch_t *m, size_t nsub)
 {
        const char *rp;
-       size_t n;
+       unsigned int n;
 
        for (rp = replace; *rp != '\0'; rp++) {
                if (*rp == '\\' && (rp[1] == '&' || rp[1] == '\\')) {
@@ -1615,15 +1615,14 @@ RegexReplace(const char *replace, SepBuf
                }
 
                /* \0 to \9 backreference */
-               n = (size_t)(rp[1] - '0');
+               n = rp[1] - '0';
                rp++;
 
                if (n >= nsub) {
-                       Error("No subexpression \\%u", (unsigned)n);
+                       Error("No subexpression \\%u", n);
                } else if (m[n].rm_so == -1) {
                        if (opts.strict) {
-                               Error("No match for subexpression \\%u",
-                                   (unsigned)n);
+                               Error("No match for subexpression \\%u", n);
                        }
                } else {
                        SepBuf_AddBytesBetween(buf,