Function cmark_node_insert_before

src/node.c:703–734

}

int cmark_node_insert_before(cmark_node *node, cmark_node *sibling) {
  if (node == NULL || sibling == NULL) {
    return 0;
  }

  if (!node->parent || !S_can_contain(node->parent, sibling)) {
    return 0;
  }

  S_node_unlink(sibling);

  cmark_node *old_prev = node->prev;

  // Insert 'sibling' between 'old_prev' and 'node'.
  if (old_prev) {
    old_prev->next = sibling;
  }
  sibling->prev = old_prev;
  sibling->next = node;
  node->prev = sibling;

  // Set new parent.
  cmark_node *parent = node->parent;
  sibling->parent = parent;

  // Adjust first_child of parent if inserted as first child.
  if (parent && !old_prev) {
    parent->first_child = sibling;
  }

  return 1;
}

int cmark_node_insert_after(cmark_node *node, cmark_node *sibling) {
  if (node == NULL || sibling == NULL) {