employ new explicit "exists in index?" API

Each caller of index_name_exists() knows whether it is looking for a
directory or a file, and can avoid the unnecessary indirection of
index_name_exists() by instead calling index_dir_exists() or
index_file_exists() directly.

Invoking the appropriate search function explicitly will allow a
subsequent patch to relieve callers of the artificial burden of having
to add a trailing '/' to the pathname given to index_dir_exists().

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

dir.c

@@ -860,7 +860,7 @@ static struct dir_entry *dir_entry_new(const char *pathname, int len)
 
 static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)
 {
-	if (cache_name_exists(pathname, len, ignore_case))
+	if (cache_file_exists(pathname, len, ignore_case))
 		return NULL;
 
 	ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
@@ -885,11 +885,11 @@ enum exist_status {
 /*
  * Do not use the alphabetically sorted index to look up
  * the directory name; instead, use the case insensitive
- * name hash.
+ * directory hash.
  */
 static enum exist_status directory_exists_in_index_icase(const char *dirname, int len)
 {
-	const struct cache_entry *ce = cache_name_exists(dirname, len + 1, ignore_case);
+	const struct cache_entry *ce = cache_dir_exists(dirname, len + 1);
 	unsigned char endchar;
 
 	if (!ce)
@@ -1071,7 +1071,7 @@ static int get_index_dtype(const char *path, int len)
 	int pos;
 	const struct cache_entry *ce;
 
-	ce = cache_name_exists(path, len, 0);
+	ce = cache_file_exists(path, len, 0);
 	if (ce) {
 		if (!ce_uptodate(ce))
 			return DT_UNKNOWN;
@@ -1131,7 +1131,7 @@ static enum path_treatment treat_one_path(struct dir_struct *dir,
 					  int dtype, struct dirent *de)
 {
 	int exclude;
-	int has_path_in_index = !!cache_name_exists(path->buf, path->len, ignore_case);
+	int has_path_in_index = !!cache_file_exists(path->buf, path->len, ignore_case);
 
 	if (dtype == DT_UNKNOWN)
 		dtype = get_dtype(de, path->buf, path->len);

read-cache.c

@@ -643,7 +643,7 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
 			if (*ptr == '/') {
 				struct cache_entry *foundce;
 				++ptr;
-				foundce = index_name_exists(istate, ce->name, ptr - ce->name, ignore_case);
+				foundce = index_dir_exists(istate, ce->name, ptr - ce->name);
 				if (foundce) {
 					memcpy((void *)startPtr, foundce->name + (startPtr - ce->name), ptr - startPtr);
 					startPtr = ptr;
@@ -652,7 +652,7 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
 		}
 	}
 
-	alias = index_name_exists(istate, ce->name, ce_namelen(ce), ignore_case);
+	alias = index_file_exists(istate, ce->name, ce_namelen(ce), ignore_case);
 	if (alias && !ce_stage(alias) && !ie_match_stat(istate, alias, st, ce_option)) {
 		/* Nothing changed, really */
 		free(ce);

unpack-trees.c

@@ -1357,7 +1357,7 @@ static int icase_exists(struct unpack_trees_options *o, const char *name, int le
 {
 	const struct cache_entry *src;
 
-	src = index_name_exists(o->src_index, name, len, 1);
+	src = index_file_exists(o->src_index, name, len, 1);
 	return src && !ie_match_stat(o->src_index, src, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
 }
 
@@ -1403,7 +1403,7 @@ static int check_ok_to_remove(const char *name, int len, int dtype,
 	 * delete this path, which is in a subdirectory that
 	 * is being replaced with a blob.
 	 */
-	result = index_name_exists(&o->result, name, len, 0);
+	result = index_file_exists(&o->result, name, len, 0);
 	if (result) {
 		if (result->ce_flags & CE_REMOVE)
 			return 0;