Signed-off-by: Michael Haggerty <mhag...@alum.mit.edu>
---
Documentation/technical/api-string-list.txt | 4 ++++
string-list.c | 17 +++++++++++++++++
string-list.h | 5 +++++
3 files changed, 26 insertions(+)
diff --git a/Documentation/technical/api-string-list.txt
b/Documentation/technical/api-string-list.txt
index 15b8072..9206f8f 100644
--- a/Documentation/technical/api-string-list.txt
+++ b/Documentation/technical/api-string-list.txt
@@ -104,6 +104,10 @@ write `string_list_insert(...)->util = ...;`.
Look up a given string in the string_list, returning the containing
string_list_item. If the string is not found, NULL is returned.
+`string_list_remove_duplicates`::
+
+ Remove all but the first entry that has a given string value.
+
* Functions for unsorted lists only
`string_list_append`::
diff --git a/string-list.c b/string-list.c
index 72610ce..bfef6cf 100644
--- a/string-list.c
+++ b/string-list.c
@@ -92,6 +92,23 @@ struct string_list_item *string_list_lookup(struct
string_list *list, const char
return list->items + i;
}
+void string_list_remove_duplicates(struct string_list *list, int free_util)
+{
+ if (list->nr > 1) {
+ int src, dst;
+ for (src = dst = 1; src < list->nr; src++) {
+ if (!strcmp(list->items[dst - 1].string,
list->items[src].string)) {
+ if (list->strdup_strings)
+ free(list->items[src].string);
+ if (free_util)
+ free(list->items[src].util);
+ } else
+ list->items[dst++] = list->items[src];
+ }
+ list->nr = dst;
+ }
+}
+
int for_each_string_list(struct string_list *list,
string_list_each_func_t fn, void *cb_data)
{
diff --git a/string-list.h b/string-list.h
index 84996aa..c4dc659 100644
--- a/string-list.h
+++ b/string-list.h
@@ -38,6 +38,7 @@ int for_each_string_list(struct string_list *list,
void filter_string_list(struct string_list *list, int free_util,
string_list_each_func_t fn, void *cb_data);
+
/* Use these functions only on sorted lists: */
int string_list_has_string(const struct string_list *list, const char *string);
int string_list_find_insert_index(const struct string_list *list, const char
*string,
@@ -47,6 +48,10 @@ struct string_list_item *string_list_insert_at_index(struct
string_list *list,
int insert_at, const char
*string);
struct string_list_item *string_list_lookup(struct string_list *list, const
char *string);
+/* Remove all but the first entry that has a given string value. */
+void string_list_remove_duplicates(struct string_list *list, int free_util);
+
+
/* Use these functions only on unsorted lists: */
struct string_list_item *string_list_append(struct string_list *list, const
char *string);
void sort_string_list(struct string_list *list);
--
1.7.11.3
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