[PATCH v3 1/3] string-list: add string_list initialiser helper functions

[Tanay Abhra <tanayabh@gmail.com>]

The string-list API has STRING_LIST_INIT_* macros to be used
to define variables with initialisers, but lacks functions
to initialise an uninitialised piece of memory to be used as
a string-list at the run-time.
Introduce string_list_init_{dup,nodup}() functions for that.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 string-list.c | 18 ++++++++++++++++++
 string-list.h |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/string-list.c b/string-list.c
index aabb25e..8c3a4eb 100644
--- a/string-list.c
+++ b/string-list.c
@@ -1,6 +1,24 @@
 #include "cache.h"
 #include "string-list.h"
 
+void string_list_init_nodup(struct string_list *list)
+{
+	list->items = NULL;
+	list->nr = 0;
+	list->alloc = 0;
+	list->strdup_strings = 0;
+	list->cmp = NULL;
+}
+
+void string_list_init_dup(struct string_list *list)
+{
+	list->items = NULL;
+	list->nr = 0;
+	list->alloc = 0;
+	list->strdup_strings = 1;
+	list->cmp = NULL;
+}
+
 /* if there is no exact match, point to the index where the entry could be
  * inserted */
 static int get_entry_index(const struct string_list *list, const char *string,
diff --git a/string-list.h b/string-list.h
index dd5e294..c90d6c1 100644
--- a/string-list.h
+++ b/string-list.h
@@ -18,6 +18,9 @@ struct string_list {
 #define STRING_LIST_INIT_NODUP { NULL, 0, 0, 0, NULL }
 #define STRING_LIST_INIT_DUP   { NULL, 0, 0, 1, NULL }
 
+void string_list_init_nodup(struct string_list *list);
+void string_list_init_dup(struct string_list *list);
+
 void print_string_list(const struct string_list *p, const char *text);
 void string_list_clear(struct string_list *list, int free_util);
 
-- 
1.9.0.GIT