dir.c: rename excluded_from_list() to is_excluded_from_list()

Continue adopting clearer names for exclude functions.  This 'is_*'
naming pattern for functions returning booleans was discussed here:

http://thread.gmane.org/gmane.comp.version-control.git/204661/focus=204924

Also adjust their callers as necessary.

Signed-off-by: Adam Spiers <git@adamspiers.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

dir.c

@@ -605,7 +605,7 @@ int match_pathname(const char *pathname, int pathlen,
 /* Scan the list and let the last match determine the fate.
  * Return 1 for exclude, 0 for include and -1 for undecided.
  */
-int excluded_from_list(const char *pathname,
+int is_excluded_from_list(const char *pathname,
 			  int pathlen, const char *basename, int *dtype,
 			  struct exclude_list *el)
 {
@@ -654,8 +654,9 @@ static int excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
 
 	prep_exclude(dir, pathname, basename-pathname);
 	for (st = EXC_CMDL; st <= EXC_FILE; st++) {
-		switch (excluded_from_list(pathname, pathlen, basename,
-					   dtype_p, &dir->exclude_list[st])) {
+		switch (is_excluded_from_list(pathname, pathlen,
+					      basename, dtype_p,
+					      &dir->exclude_list[st])) {
 		case 0:
 			return 0;
 		case 1:

dir.h

@@ -98,7 +98,7 @@ extern int within_depth(const char *name, int namelen, int depth, int max_depth)
 extern int fill_directory(struct dir_struct *dir, const char **pathspec);
 extern int read_directory(struct dir_struct *, const char *path, int len, const char **pathspec);
 
-extern int excluded_from_list(const char *pathname, int pathlen, const char *basename,
+extern int is_excluded_from_list(const char *pathname, int pathlen, const char *basename,
 				 int *dtype, struct exclude_list *el);
 struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len);
 

unpack-trees.c

@@ -836,7 +836,8 @@ static int clear_ce_flags_dir(struct cache_entry **cache, int nr,
 {
 	struct cache_entry **cache_end;
 	int dtype = DT_DIR;
-	int ret = excluded_from_list(prefix, prefix_len, basename, &dtype, el);
+	int ret = is_excluded_from_list(prefix, prefix_len,
+					basename, &dtype, el);
 
 	prefix[prefix_len++] = '/';
 
@@ -855,7 +856,7 @@ static int clear_ce_flags_dir(struct cache_entry **cache, int nr,
 	 * with ret (iow, we know in advance the incl/excl
 	 * decision for the entire directory), clear flag here without
 	 * calling clear_ce_flags_1(). That function will call
-	 * the expensive excluded_from_list() on every entry.
+	 * the expensive is_excluded_from_list() on every entry.
 	 */
 	return clear_ce_flags_1(cache, cache_end - cache,
 				prefix, prefix_len,
@@ -938,7 +939,8 @@ static int clear_ce_flags_1(struct cache_entry **cache, int nr,
 
 		/* Non-directory */
 		dtype = ce_to_dtype(ce);
-		ret = excluded_from_list(ce->name, ce_namelen(ce), name, &dtype, el);
+		ret = is_excluded_from_list(ce->name, ce_namelen(ce),
+					    name, &dtype, el);
 		if (ret < 0)
 			ret = defval;
 		if (ret > 0)