Merge branch 'nd/fix-directory-attrs-off-by-one' into maint

The attribute mechanism didn't allow limiting attributes to be
applied to only a single directory itself with "path/" like the
exclude mechanism does.  The initial implementation of this that was
merged to 'maint' and 1.8.1.1 had severe performance degradations.

* nd/fix-directory-attrs-off-by-one:
attr: avoid calling find_basename() twice per path
attr: fix off-by-one directory component length calculation

diff --combined attr.c
index b05110d586c3e5b3ff685576322c85eb0b9ddbbb,ab2aab28de88e9850d3c51163a8360191ee2e340..8985c5c25b365276259838c1a50945b7e600dc31
--- 1/attr.c
--- 2/attr.c
+++ b/attr.c
@@@ -564,25 -564,12 +564,12 @@@ static void bootstrap_attr_stack(void
        attr_stack = elem;
  }
  
- static const char *find_basename(const char *path)
- {
-       const char *cp, *last_slash = NULL;
- 
-       for (cp = path; *cp; cp++) {
-               if (*cp == '/' && cp[1])
-                       last_slash = cp;
-       }
-       return last_slash ? last_slash + 1 : path;
- }
- 
- static void prepare_attr_stack(const char *path)
+ static void prepare_attr_stack(const char *path, int dirlen)
  {
        struct attr_stack *elem, *info;
-       int dirlen, len;
+       int len;
        const char *cp;
  
-       dirlen = find_basename(path) - path;
- 
        /*
         * At the bottom of the attribute stack is the built-in
         * set of attribute definitions, followed by the contents
@@@ -704,7 -691,7 +691,7 @@@ static int fill_one(const char *what, s
  
                if (*n == ATTR__UNKNOWN) {
                        debug_set(what,
 -                                a->is_macro ? a->u.attr->name : a->u.pattern,
 +                                a->is_macro ? a->u.attr->name : a->u.pat.pattern,
                                  attr, v);
                        *n = v;
                        rem--;
@@@ -762,15 -749,26 +749,26 @@@ static int macroexpand_one(int attr_nr
  static void collect_all_attrs(const char *path)
  {
        struct attr_stack *stk;
-       int i, pathlen, rem;
-       const char *basename;
+       int i, pathlen, rem, dirlen;
+       const char *basename, *cp, *last_slash = NULL;
+ 
+       for (cp = path; *cp; cp++) {
+               if (*cp == '/' && cp[1])
+                       last_slash = cp;
+       }
+       pathlen = cp - path;
+       if (last_slash) {
+               basename = last_slash + 1;
+               dirlen = last_slash - path;
+       } else {
+               basename = path;
+               dirlen = 0;
+       }
  
-       prepare_attr_stack(path);
+       prepare_attr_stack(path, dirlen);
        for (i = 0; i < attr_nr; i++)
                check_all_attr[i].value = ATTR__UNKNOWN;
  
-       basename = find_basename(path);
-       pathlen = strlen(path);
        rem = attr_nr;
        for (stk = attr_stack; 0 < rem && stk; stk = stk->prev)
                rem = fill(path, pathlen, basename, stk, rem);