1 files changed, 131 insertions, 0 deletions
diff --git a/string-list.h b/string-list.h
new file mode 100644
index 0000000000..d3809a1417
--- /dev/null
+++ b/string-list.h
@@ -0,0 +1,131 @@
+#ifndef STRING_LIST_H
+#define STRING_LIST_H
+
+struct string_list_item {
+	char *string;
+	void *util;
+};
+
+typedef int (*compare_strings_fn)(const char *, const char *);
+
+struct string_list {
+	struct string_list_item *items;
+	unsigned int nr, alloc;
+	unsigned int strdup_strings:1;
+	compare_strings_fn cmp; /* NULL uses strcmp() */
+};
+
+#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);
+
+/* 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 this function or the macro below to iterate over each item */
+typedef int (*string_list_each_func_t)(struct string_list_item *, void *);
+int for_each_string_list(struct string_list *list,
+			 string_list_each_func_t, void *cb_data);
+#define for_each_string_list_item(item,list) \
+	for (item = (list)->items; item < (list)->items + (list)->nr; ++item)
+
+/*
+ * Apply want to each item in list, retaining only the ones for which
+ * the function returns true.  If free_util is true, call free() on
+ * the util members of any items that have to be deleted.  Preserve
+ * the order of the items that are retained.
+ */
+void filter_string_list(struct string_list *list, int free_util,
+			string_list_each_func_t want, void *cb_data);
+
+/*
+ * Remove any empty strings from the list.  If free_util is true, call
+ * free() on the util members of any items that have to be deleted.
+ * Preserve the order of the items that are retained.
+ */
+void string_list_remove_empty_items(struct string_list *list, int free_util);
+
+/* 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);
+/*
+ * Inserts the given string into the sorted list.
+ * If the string already exists, the list is not altered.
+ * Returns the string_list_item, the string is part of.
+ */
+struct string_list_item *string_list_insert(struct string_list *list, const char *string);
+
+/*
+ * Checks if the given string is part of a sorted list. If it is part of the list,
+ * return the coresponding string_list_item, NULL otherwise.
+ */
+struct string_list_item *string_list_lookup(struct string_list *list, const char *string);
+
+/*
+ * Remove all but the first of consecutive entries with the same
+ * string value.  If free_util is true, call free() on the util
+ * members of any items that have to be deleted.
+ */
+void string_list_remove_duplicates(struct string_list *sorted_list, int free_util);
+
+
+/* Use these functions only on unsorted lists: */
+
+/*
+ * Add string to the end of list.  If list->strdup_string is set, then
+ * string is copied; otherwise the new string_list_entry refers to the
+ * input string.
+ */
+struct string_list_item *string_list_append(struct string_list *list, const char *string);
+
+/*
+ * Like string_list_append(), except string is never copied.  When
+ * list->strdup_strings is set, this function can be used to hand
+ * ownership of a malloc()ed string to list without making an extra
+ * copy.
+ */
+struct string_list_item *string_list_append_nodup(struct string_list *list, char *string);
+
+void string_list_sort(struct string_list *list);
+int unsorted_string_list_has_string(struct string_list *list, const char *string);
+struct string_list_item *unsorted_string_list_lookup(struct string_list *list,
+						     const char *string);
+
+void unsorted_string_list_delete_item(struct string_list *list, int i, int free_util);
+
+/*
+ * Split string into substrings on character delim and append the
+ * substrings to list.  The input string is not modified.
+ * list->strdup_strings must be set, as new memory needs to be
+ * allocated to hold the substrings.  If maxsplit is non-negative,
+ * then split at most maxsplit times.  Return the number of substrings
+ * appended to list.
+ *
+ * Examples:
+ *   string_list_split(l, "foo:bar:baz", ':', -1) -> ["foo", "bar", "baz"]
+ *   string_list_split(l, "foo:bar:baz", ':', 0) -> ["foo:bar:baz"]
+ *   string_list_split(l, "foo:bar:baz", ':', 1) -> ["foo", "bar:baz"]
+ *   string_list_split(l, "foo:bar:", ':', -1) -> ["foo", "bar", ""]
+ *   string_list_split(l, "", ':', -1) -> [""]
+ *   string_list_split(l, ":", ':', -1) -> ["", ""]
+ */
+int string_list_split(struct string_list *list, const char *string,
+		      int delim, int maxsplit);
+
+/*
+ * Like string_list_split(), except that string is split in-place: the
+ * delimiter characters in string are overwritten with NULs, and the
+ * new string_list_items point into string (which therefore must not
+ * be modified or freed while the string_list is in use).
+ * list->strdup_strings must *not* be set.
+ */
+int string_list_split_in_place(struct string_list *list, char *string,
+			       int delim, int maxsplit);
+#endif /* STRING_LIST_H */