Convert the users of for_each_string_list to for_each_string_list_item macro

The rule for selecting the candidates for conversion is: if the callback
function returns only 0 (the condition for for_each_string_list to exit
early), than it can be safely converted to the macro.

A notable exception are the callers in builtin/remote.c. If converted, the
readability in the file will suffer greately. Besides, the code is not very
performance critical (at the moment, at least): it does output formatting of
the list of remotes.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

2 files changed, 35 insertions, 52 deletions

diff --git a/builtin/fetch.c b/builtin/fetch.c
index 6eb1dfea09..b0bfaa9ae3 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -544,40 +544,14 @@ static int will_fetch(struct ref **head, const unsigned char *sha1)
 	return 0;
 }
 
-struct tag_data {
-	struct ref **head;
-	struct ref ***tail;
-};
-
-static int add_to_tail(struct string_list_item *item, void *cb_data)
-{
-	struct tag_data *data = (struct tag_data *)cb_data;
-	struct ref *rm = NULL;
-
-	/* We have already decided to ignore this item */
-	if (!item->util)
-		return 0;
-
-	rm = alloc_ref(item->string);
-	rm->peer_ref = alloc_ref(item->string);
-	hashcpy(rm->old_sha1, item->util);
-
-	**data->tail = rm;
-	*data->tail = &rm->next;
-
-	return 0;
-}
-
 static void find_non_local_tags(struct transport *transport,
 			struct ref **head,
 			struct ref ***tail)
 {
 	struct string_list existing_refs = { NULL, 0, 0, 0 };
 	struct string_list remote_refs = { NULL, 0, 0, 0 };
-	struct tag_data data;
 	const struct ref *ref;
 	struct string_list_item *item = NULL;
-	data.head = head; data.tail = tail;
 
 	for_each_ref(add_existing, &existing_refs);
 	for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
@@ -631,10 +605,20 @@ static void find_non_local_tags(struct transport *transport,
 		item->util = NULL;
 
 	/*
-	 * For all the tags in the remote_refs string list, call
-	 * add_to_tail to add them to the list of refs to be fetched
+	 * For all the tags in the remote_refs string list,
+	 * add them to the list of refs to be fetched
 	 */
-	for_each_string_list(&remote_refs, add_to_tail, &data);
+	for_each_string_list_item(item, &remote_refs) {
+		/* Unless we have already decided to ignore this item... */
+		if (item->util)
+		{
+			struct ref *rm = alloc_ref(item->string);
+			rm->peer_ref = alloc_ref(item->string);
+			hashcpy(rm->old_sha1, item->util);
+			**tail = rm;
+			*tail = &rm->next;
+		}
+	}
 
 	string_list_clear(&remote_refs, 0);
 }
diff --git a/builtin/ls-files.c b/builtin/ls-files.c
index 1b9b8a8b4a..cf6ab034ff 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -164,33 +164,32 @@ static void show_ce_entry(const char *tag, struct cache_entry *ce)
 	write_name(ce->name, ce_namelen(ce));
 }
 
-static int show_one_ru(struct string_list_item *item, void *cbdata)
-{
-	const char *path = item->string;
-	struct resolve_undo_info *ui = item->util;
-	int i, len;
-
-	len = strlen(path);
-	if (len < max_prefix_len)
-		return 0; /* outside of the prefix */
-	if (!match_pathspec(pathspec, path, len, max_prefix_len, ps_matched))
-		return 0; /* uninterested */
-	for (i = 0; i < 3; i++) {
-		if (!ui->mode[i])
-			continue;
-		printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
-		       find_unique_abbrev(ui->sha1[i], abbrev),
-		       i + 1);
-		write_name(path, len);
-	}
-	return 0;
-}
-
 static void show_ru_info(void)
 {
+	struct string_list_item *item;
+
 	if (!the_index.resolve_undo)
 		return;
-	for_each_string_list(the_index.resolve_undo, show_one_ru, NULL);
+
+	for_each_string_list_item(item, the_index.resolve_undo) {
+		const char *path = item->string;
+		struct resolve_undo_info *ui = item->util;
+		int i, len;
+
+		len = strlen(path);
+		if (len < max_prefix_len)
+			continue; /* outside of the prefix */
+		if (!match_pathspec(pathspec, path, len, max_prefix_len, ps_matched))
+			continue; /* uninterested */
+		for (i = 0; i < 3; i++) {
+			if (!ui->mode[i])
+				continue;
+			printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
+			       find_unique_abbrev(ui->sha1[i], abbrev),
+			       i + 1);
+			write_name(path, len);
+		}
+	}
 }
 
 static void show_files(struct dir_struct *dir)