util.uuid: Added function seed(string) to allow further seeding of the PRNG

diff --git a/util/uuid.lua b/util/uuid.lua
index a6dc0a1e8f575be59fc775b934d4873aa5bdbf1b..eca35134714b5722e4b9ca8fe338ff8596dfbf90 100644 (file)
--- a/util/uuid.lua
+++ b/util/uuid.lua
@@ -28,10 +28,11 @@ local function new_random(x)
 end
 
 local buffer = new_random(uniq_time());
+local function _seed(x)
+       buffer = new_random(buffer..x);
+end
 local function get_nibbles(n)
-       if #buffer < n then
-               buffer = new_random(buffer..uniq_time());
-       end
+       if #buffer < n then seed(uniq_time()); end
        local r = buffer:sub(0, n);
        buffer = buffer:sub(n+1);
        return r;
@@ -44,5 +45,6 @@ function generate()
        -- generate RFC 4122 complaint UUIDs (version 4 - random)
        return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12);
 end
+seed = _seed;
 
 return _M;