string-list: add string_list_remove function

Teach string-list to be able to remove a string from a sorted
'struct string_list'.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/string-list.c b/string-list.c
index 45016ad86d..8f7b69ada1 100644
--- a/string-list.c
+++ b/string-list.c
@@ -67,6 +67,24 @@ struct string_list_item *string_list_insert(struct string_list *list, const char
 	return list->items + index;
 }
 
+void string_list_remove(struct string_list *list, const char *string,
+			int free_util)
+{
+	int exact_match;
+	int i = get_entry_index(list, string, &exact_match);
+
+	if (exact_match) {
+		if (list->strdup_strings)
+			free(list->items[i].string);
+		if (free_util)
+			free(list->items[i].util);
+
+		list->nr--;
+		memmove(list->items + i, list->items + i + 1,
+			(list->nr - i) * sizeof(struct string_list_item));
+	}
+}
+
 int string_list_has_string(const struct string_list *list, const char *string)
 {
 	int exact_match;