Mercurial > hg > ucx / changeset

     1.1 --- a/src/linked_list.c	Sun Sep 26 14:45:51 2021 +0200
     1.2 +++ b/src/linked_list.c	Sun Sep 26 15:26:43 2021 +0200
     1.3 @@ -55,18 +55,24 @@
     1.4      void *last = cx_linked_list_last(begin, end, loc_next);
     1.5      if (last == NULL) {
     1.6          if (begin == NULL) {
     1.7 +            // no current list and no begin ptr to write to - we don't find something to append to
     1.8              return 1;
     1.9          } else {
    1.10 +            // start fresh list
    1.11              *begin = new_node;
    1.12 -            return 0;
    1.13          }
    1.14 +    } else {
    1.15 +        // if there is a last node, update its next pointer
    1.16 +        void **next = CX_LL_PTR(last, loc_next);
    1.17 +        *next = new_node;
    1.18      }
    1.19  
    1.20 -    void **next = CX_LL_PTR(last, loc_next);
    1.21 -    *next = new_node;
    1.22 +    // if there is an end pointer, update it
    1.23      if (end != NULL) {
    1.24          *end = cx_linked_list_last(&new_node, NULL, loc_next);
    1.25      }
    1.26 +
    1.27 +    // if the nodes use a prev pointer, update it
    1.28      if (loc_prev >= 0) {
    1.29          void **prev = CX_LL_PTR(new_node, loc_prev);
    1.30          *prev = last;