(*
    ||M||  This file is part of HELM, an Hypertextual, Electronic        
    ||A||  Library of Mathematics, developed at the Computer Science     
    ||T||  Department, University of Bologna, Italy.                     
    ||I||                                                                
    ||T||  HELM is free software; you can redistribute it and/or         
    ||A||  modify it under the terms of the GNU General Public License   
    \   /  version 2 or (at your option) any later version.              
     \ /   This software is distributed as is, NO WARRANTY.              
      V_______________________________________________________________ *)

module P = Printf
module L = Log

let utime_stamp =
   let old = ref 0.0 in
   fun msg -> 
      let times = Unix.times () in
      let stamp = times.Unix.tms_utime in
      let lap = stamp -. !old in
      L.warn (P.sprintf "USR TIME STAMP (%s): %f (%f)" msg stamp lap);
      old := stamp

let gmtime msg =
   let gmt = Unix.gmtime (Unix.time ()) in
   let yy = gmt.Unix.tm_year + 1900 in
   let mm = gmt.Unix.tm_mon + 1 in
   let dd = gmt.Unix.tm_mday in
   let h = gmt.Unix.tm_hour in
   let m = gmt.Unix.tm_min in
   let s = gmt.Unix.tm_sec in
   L.warn (
      P.sprintf "UTC TIME STAMP (%s): %u/%u/%u %u:%u:%u" msg yy mm dd h m s
   )