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;; util.cljs - utility routines for gnunet-web website
;; Copyright (C) 2014,2015 David Barksdale <amatus@amatus.name>
;;
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(ns gnunet-web.util
(:require [client-lib]))
(defn now
[]
(-> (js/Date.) (.valueOf) (* 1000)))
(def objects (atom {:next 0}))
(defn register-object
[object]
(swap! objects
(fn [{:keys [next] :as objects}]
(conj objects
{next object
:next (inc next)})))
;; This would normally be cheating
(dec (:next @objects)))
(defn unregister-object
[object-key]
(swap! objects dissoc object-key))
(defn get-object
[object-key]
(get @objects object-key))
(defn real-to-i64
[x]
[(unsigned-bit-shift-right x 0)
(Math/min 4294967295 (Math/floor (/ x 4294967296)))])
(defn i64-to-real
[[lw hw]]
(+ lw (* 4294967296 hw)))
(defn read-memory
[pointer length]
(.call js/Array.prototype.slice
(.subarray js/HEAPU8 pointer (+ pointer length))))
(defn data->string
[data]
(let [data-array (to-array data)
data-len (count data)
strlen (quot (+ (* 8 data-len) 4) 5)
string-pointer (js/_malloc strlen)]
(js/ccallFunc
js/_GNUNET_STRINGS_data_to_string
"number"
(array "array" "number" "number" "number")
(array data-array data-len string-pointer strlen))
(let [string (js/Pointer_stringify string-pointer strlen)]
(js/_free string-pointer)
string)))
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