The string-list API has STRING_LIST_INIT_* macros to be used
to define variables with initializers, but lacks functions
to initialise an uninitialized piece of memory to be used as
a string-list at the run-time.
Introduce `string_list_init()` function for that.

Signed-off-by: Tanay Abhra <tanay...@gmail.com>
---
 Documentation/technical/api-string-list.txt | 5 +++++
 string-list.c                               | 6 ++++++
 string-list.h                               | 2 ++
 3 files changed, 13 insertions(+)

diff --git a/Documentation/technical/api-string-list.txt 
b/Documentation/technical/api-string-list.txt
index f1add51..d51a657 100644
--- a/Documentation/technical/api-string-list.txt
+++ b/Documentation/technical/api-string-list.txt
@@ -68,6 +68,11 @@ Functions
 
 * General ones (works with sorted and unsorted lists as well)
 
+`string_list_init`::
+
+       Initialize the members of the string_list, set `strdup_strings`
+       member according to the value of the second parameter.
+
 `filter_string_list`::
 
        Apply a function to each item in a list, retaining only the
diff --git a/string-list.c b/string-list.c
index aabb25e..db38b62 100644
--- a/string-list.c
+++ b/string-list.c
@@ -1,6 +1,12 @@
 #include "cache.h"
 #include "string-list.h"
 
+void string_list_init(struct string_list *list, int strdup_strings)
+{
+       memset(list, 0, sizeof(*list));
+       list->strdup_strings = strdup_strings;
+}
+
 /* 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..494eb5d 100644
--- a/string-list.h
+++ b/string-list.h
@@ -18,6 +18,8 @@ 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(struct string_list *list, int strdup_strings);
+
 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

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