[luatex] Behavior of node lists.

[luigi scarso]

On Mon, Jul 4, 2011 at 10:02 AM, Paul Isambert <zappathustra at free.fr> wrote:
> What about the second problem?
Last svn says in lnodelib.c

static int lua_nodelib_insert_after(lua_State * L)
{
    halfword head, current, n;
    if (lua_gettop(L) < 3) {
        luaL_error(L, "Not enough arguments for node.insert_after()");
    }
    if (lua_isnil(L, 3)) {
        lua_pop(L, 1);
        return 2;
    } else {
        n = *(check_isnode(L, 3));
    }
    if (lua_isnil(L, 1)) {      /* no head */
        vlink(n) = null;
        alink(n) = null;
        lua_nodelib_push_fast(L, n);
        lua_pushvalue(L, -1);
        return 2;
    } else {
        head = *(check_isnode(L, 1));
    }
    if (lua_isnil(L, 2)) {
        current = head;
        while (vlink(current) != null)
            current = vlink(current);
    } else {
        current = *(check_isnode(L, 2));
    }
    try_couple_nodes(n, vlink(current));
    couple_nodes(current, n);

    lua_pop(L, 2);
    lua_nodelib_push_fast(L, n);
    return 2;
}

Open to suggestions.
-- 
luigi