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authorMarius Storm-Olsen <marius@trolltech.com>2009-02-08 15:34:28 +0100
committerJunio C Hamano <gitster@pobox.com>2009-02-08 12:36:31 -0800
commitcfa1ee6b340172a415049704cd848593392b9064 (patch)
tree8819e69737bd86be223c50b863a59e0909294ee9
parentd551a488169aeb2ac09dba781f2ffbecf3425996 (diff)
downloadgit-cfa1ee6b340172a415049704cd848593392b9064.tar.gz
git-cfa1ee6b340172a415049704cd848593392b9064.tar.xz
Add find_insert_index, insert_at_index and clear_func functions to string_list
string_list_find_insert_index() and string_list_insert_at_index() enables you to see if an item is in the string_list, and to insert at the appropriate index in the list, if not there. This is usefull if you need to manipulate an existing item, if present, and insert a new item if not. Future mailmap code will use this construct to enable complex (old_name, old_email) -> (new_name, new_email) lookups. The string_list_clear_func() allows to call a custom cleanup function on each item in a string_list, which is useful is the util member points to a complex structure. Signed-off-by: Marius Storm-Olsen <marius@trolltech.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--string-list.c43
-rw-r--r--string-list.h9
2 files changed, 48 insertions, 4 deletions
diff --git a/string-list.c b/string-list.c
index ddd83c8c7..15e14cf47 100644
--- a/string-list.c
+++ b/string-list.c
@@ -26,10 +26,10 @@ static int get_entry_index(const struct string_list *list, const char *string,
}
/* returns -1-index if already exists */
-static int add_entry(struct string_list *list, const char *string)
+static int add_entry(int insert_at, struct string_list *list, const char *string)
{
- int exact_match;
- int index = get_entry_index(list, string, &exact_match);
+ int exact_match = 0;
+ int index = insert_at != -1 ? insert_at : get_entry_index(list, string, &exact_match);
if (exact_match)
return -1 - index;
@@ -53,7 +53,13 @@ static int add_entry(struct string_list *list, const char *string)
struct string_list_item *string_list_insert(const char *string, struct string_list *list)
{
- int index = add_entry(list, string);
+ return string_list_insert_at_index(-1, string, list);
+}
+
+struct string_list_item *string_list_insert_at_index(int insert_at,
+ const char *string, struct string_list *list)
+{
+ int index = add_entry(insert_at, list, string);
if (index < 0)
index = -1 - index;
@@ -68,6 +74,16 @@ int string_list_has_string(const struct string_list *list, const char *string)
return exact_match;
}
+int string_list_find_insert_index(const struct string_list *list, const char *string,
+ int negative_existing_index)
+{
+ int exact_match;
+ int index = get_entry_index(list, string, &exact_match);
+ if (exact_match)
+ index = -1 - (negative_existing_index ? index : 0);
+ return index;
+}
+
struct string_list_item *string_list_lookup(const char *string, struct string_list *list)
{
int exact_match, i = get_entry_index(list, string, &exact_match);
@@ -94,6 +110,25 @@ void string_list_clear(struct string_list *list, int free_util)
list->nr = list->alloc = 0;
}
+void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc)
+{
+ if (list->items) {
+ int i;
+ if (clearfunc) {
+ for (i = 0; i < list->nr; i++)
+ clearfunc(list->items[i].util, list->items[i].string);
+ }
+ if (list->strdup_strings) {
+ for (i = 0; i < list->nr; i++)
+ free(list->items[i].string);
+ }
+ free(list->items);
+ }
+ list->items = NULL;
+ list->nr = list->alloc = 0;
+}
+
+
void print_string_list(const char *text, const struct string_list *p)
{
int i;
diff --git a/string-list.h b/string-list.h
index 4d6a7051f..d32ba0520 100644
--- a/string-list.h
+++ b/string-list.h
@@ -15,9 +15,18 @@ struct string_list
void print_string_list(const char *text, const struct string_list *p);
void string_list_clear(struct string_list *list, int free_util);
+/* Use this function to call a custom clear function on each util pointer */
+/* The string associated with the util pointer is passed as the second argument */
+typedef void (*string_list_clear_func_t)(void *p, const char *str);
+void string_list_clear_func(struct string_list *list, string_list_clear_func_t clearfunc);
+
/* 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,
+ int negative_existing_index);
struct string_list_item *string_list_insert(const char *string, struct string_list *list);
+struct string_list_item *string_list_insert_at_index(int insert_at,
+ const char *string, struct string_list *list);
struct string_list_item *string_list_lookup(const char *string, struct string_list *list);
/* Use these functions only on unsorted lists: */