string_list: add two new functions for splitting strings

diff --git a/string-list.c b/string-list.c
index ad2aa5af919f21fdfca6d61ec9939dc4ab145fdd..acb1f5b6dc3381318048c2734add7d37851c5ec7 100644 (file)
--- a/string-list.c
+++ b/string-list.c
@@ -204,3 +204,56 @@ void unsorted_string_list_delete_item(struct string_list *list, int i, int free_
        list->items[i] = list->items[list->nr-1];
        list->nr--;
 }
+
+int string_list_split(struct string_list *list, const char *string,
+                     int delim, int maxsplit)
+{
+       int count = 0;
+       const char *p = string, *end;
+
+       if (!list->strdup_strings)
+               die("internal error in string_list_split(): "
+                   "list->strdup_strings must be set");
+       for (;;) {
+               count++;
+               if (maxsplit >= 0 && count > maxsplit) {
+                       string_list_append(list, p);
+                       return count;
+               }
+               end = strchr(p, delim);
+               if (end) {
+                       string_list_append_nodup(list, xmemdupz(p, end - p));
+                       p = end + 1;
+               } else {
+                       string_list_append(list, p);
+                       return count;
+               }
+       }
+}
+
+int string_list_split_in_place(struct string_list *list, char *string,
+                              int delim, int maxsplit)
+{
+       int count = 0;
+       char *p = string, *end;
+
+       if (list->strdup_strings)
+               die("internal error in string_list_split_in_place(): "
+                   "list->strdup_strings must not be set");
+       for (;;) {
+               count++;
+               if (maxsplit >= 0 && count > maxsplit) {
+                       string_list_append(list, p);
+                       return count;
+               }
+               end = strchr(p, delim);
+               if (end) {
+                       *end = '\0';
+                       string_list_append(list, p);
+                       p = end + 1;
+               } else {
+                       string_list_append(list, p);
+                       return count;
+               }
+       }
+}