[PATCH 02/10] string-list.h: add string_list_pop function.

[Stefan Beller <sbeller@google.com>]

A string list can be used as a stack, but should we? A later patch shows
how useful this will be.

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 string-list.c | 8 ++++++++
 string-list.h | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/string-list.c b/string-list.c
index 9f651bb4294..ea80afc8a0c 100644
--- a/string-list.c
+++ b/string-list.c
@@ -80,6 +80,14 @@ void string_list_remove(struct string_list *list, const char *string,
 	}
 }
 
+struct string_list_item *string_list_pop(struct string_list *list)
+{
+	if (list->nr == 0)
+		return 0;
+
+	return &list->items[--list->nr];
+}
+
 int string_list_has_string(const struct string_list *list, const char *string)
 {
 	int exact_match;
diff --git a/string-list.h b/string-list.h
index ff8f6094a33..a1a41bc961a 100644
--- a/string-list.h
+++ b/string-list.h
@@ -191,6 +191,12 @@ extern void string_list_remove(struct string_list *list, const char *string,
  */
 struct string_list_item *string_list_lookup(struct string_list *list, const char *string);
 
+/**
+ * Returns the last item inserted and removes it from the list.
+ * If the list is empty, return NULL.
+ */
+struct string_list_item *string_list_pop(struct string_list *list);
+
 /*
  * Remove all but the first of consecutive entries with the same
  * string value.  If free_util is true, call free() on the util
-- 
2.18.0.597.ga71716f1ad-goog