[src/trunk]: src/usr.bin/make make(1): improve variable names and data types ...

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

details:   https://anonhg.NetBSD.org/src/rev/43a30b1274e7
branches:  trunk
changeset: 938084:43a30b1274e7
user:      rillig <rillig%NetBSD.org@localhost>
date:      Tue Sep 01 20:17:18 2020 +0000

description:
make(1): improve variable names and data types in Dir_FindHereOrAbove

diffstat:

 usr.bin/make/dir.c |  43 +++++++++++++++++++------------------------
 usr.bin/make/dir.h |   4 ++--
 2 files changed, 21 insertions(+), 26 deletions(-)

diffs (125 lines):

diff -r c2e51bf93cb0 -r 43a30b1274e7 usr.bin/make/dir.c
--- a/usr.bin/make/dir.c        Tue Sep 01 20:14:34 2020 +0000
+++ b/usr.bin/make/dir.c        Tue Sep 01 20:17:18 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: dir.c,v 1.128 2020/09/01 17:56:32 rillig Exp $ */
+/*     $NetBSD: dir.c,v 1.129 2020/09/01 20:17:18 rillig Exp $ */
 
 /*
  * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
@@ -70,14 +70,14 @@
  */
 
 #ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: dir.c,v 1.128 2020/09/01 17:56:32 rillig Exp $";
+static char rcsid[] = "$NetBSD: dir.c,v 1.129 2020/09/01 20:17:18 rillig Exp $";
 #else
 #include <sys/cdefs.h>
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)dir.c      8.2 (Berkeley) 1/2/94";
 #else
-__RCSID("$NetBSD: dir.c,v 1.128 2020/09/01 17:56:32 rillig Exp $");
+__RCSID("$NetBSD: dir.c,v 1.129 2020/09/01 20:17:18 rillig Exp $");
 #endif
 #endif /* not lint */
 #endif
@@ -1332,7 +1332,7 @@
  *     here            starting directory
  *     search_path     the path we are looking for
  *     result          the result of a successful search is placed here
- *     rlen            the length of the result buffer
+ *     result_len      the length of the result buffer
  *                     (typically MAXPATHLEN + 1)
  *
  * Results:
@@ -1342,19 +1342,20 @@
  * Side Effects:
  *-----------------------------------------------------------------------
  */
-int
-Dir_FindHereOrAbove(char *here, char *search_path, char *result, int rlen)
+Boolean
+Dir_FindHereOrAbove(const char *here, const char *search_path,
+                   char *result, int result_len)
 {
     struct stat st;
-    char dirbase[MAXPATHLEN + 1], *db_end;
+    char dirbase[MAXPATHLEN + 1], *dirbase_end;
     char try[MAXPATHLEN + 1], *try_end;
 
     /* copy out our starting point */
     snprintf(dirbase, sizeof(dirbase), "%s", here);
-    db_end = dirbase + strlen(dirbase);
+    dirbase_end = dirbase + strlen(dirbase);
 
     /* loop until we determine a result */
-    while (1) {
+    while (TRUE) {
 
        /* try and stat(2) it ... */
        snprintf(try, sizeof(try), "%s/%s", dirbase, search_path);
@@ -1368,36 +1369,30 @@
                while (try_end > try && *try_end != '/')
                    try_end--;
                if (try_end > try)
-                   *try_end = 0;       /* chop! */
+                   *try_end = '\0';    /* chop! */
            }
 
-           /*
-            * done!
-            */
-           snprintf(result, rlen, "%s", try);
-           return 1;
+           snprintf(result, result_len, "%s", try);
+           return TRUE;
        }
 
        /*
         * nope, we didn't find it.  if we used up dirbase we've
         * reached the root and failed.
         */
-       if (db_end == dirbase)
+       if (dirbase_end == dirbase)
            break;              /* failed! */
 
        /*
         * truncate dirbase from the end to move up a dir
         */
-       while (db_end > dirbase && *db_end != '/')
-           db_end--;
-       *db_end = 0;            /* chop! */
+       while (dirbase_end > dirbase && *dirbase_end != '/')
+           dirbase_end--;
+       *dirbase_end = '\0';    /* chop! */
 
-    } /* while (1) */
+    } /* while (TRUE) */
 
-    /*
-     * we failed...
-     */
-    return 0;
+    return FALSE;
 }
 
 /*-
diff -r c2e51bf93cb0 -r 43a30b1274e7 usr.bin/make/dir.h
--- a/usr.bin/make/dir.h        Tue Sep 01 20:14:34 2020 +0000
+++ b/usr.bin/make/dir.h        Tue Sep 01 20:17:18 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: dir.h,v 1.21 2020/09/01 17:56:32 rillig Exp $  */
+/*     $NetBSD: dir.h,v 1.22 2020/09/01 20:17:18 rillig Exp $  */
 
 /*
  * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
@@ -94,7 +94,7 @@
 Boolean Dir_HasWildcards(const char *);
 void Dir_Expand(const char *, Lst, Lst);
 char *Dir_FindFile(const char *, Lst);
-int Dir_FindHereOrAbove(char *, char *, char *, int);
+Boolean Dir_FindHereOrAbove(const char *, const char *, char *, int);
 int Dir_MTime(GNode *, Boolean);
 Path *Dir_AddDir(Lst, const char *);
 char *Dir_MakeFlags(const char *, Lst);