;; Copyright (c) 2009 Derick Eddington
;;
;; Permission is hereby granted, free of charge, to any person obtaining a
;; copy of this software and associated documentation files (the "Software"),
;; to deal in the Software without restriction, including without limitation
;; the rights to use, copy, modify, merge, publish, distribute, sublicense,
;; and/or sell copies of the Software, and to permit persons to whom the
;; Software is furnished to do so, subject to the following conditions:
;;
;; The above copyright notice and this permission notice shall be included in
;; all copies or substantial portions of the Software.
;;
;; Except as contained in this notice, the name(s) of the above copyright
;; holders shall not be used in advertising or otherwise to promote the sale,
;; use or other dealings in this Software without prior written authorization.
;;
;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
;; THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
;; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
;; DEALINGS IN THE SOFTWARE.

(library (srfi :19 time compat)
  (export
    format
    host:time-resolution
    host:current-time 
    host:time-nanosecond 
    host:time-second 
    host:time-gmt-offset)
  (import
    (r5rs) 
    (rnrs)
    (larceny load)
    (primitives r5rs:require current-utc-time timezone-offset)    
    (srfi :48 intermediate-format-strings))
  
  (define-record-type time (fields secs usecs))
  
  ;; Larceny uses gettimeofday() which gives microseconds,
  ;; so our resolution is 1000 nanoseconds
  (define host:time-resolution 1000)
  
  (define (host:current-time)
    (let-values ([(secs usecs) (current-utc-time)])
      (make-time secs usecs)))
  
  (define (host:time-nanosecond t)
    (* (time-usecs t) 1000))
  
  (define (host:time-second t)
    (time-secs t))
  
  (define (host:time-gmt-offset t) 
    (timezone-offset (time-secs t)))
  
  (r5rs:require 'time)

)
