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comparison util/random.lua @ 6420:0c070e30a7db

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util.random: Switch to SHA512
author Kim Alvefur <zash@zash.se>
date Thu, 18 Sep 2014 10:16:59 +0200
parents bd812a7713ad
children c3011ab945b8
comparison
equal deleted inserted replaced
6417:060b63a27e9b 6420:0c070e30a7db
8 8
9 local tostring = tostring; 9 local tostring = tostring;
10 local os_time = os.time; 10 local os_time = os.time;
11 local os_clock = os.clock; 11 local os_clock = os.clock;
12 local ceil = math.ceil; 12 local ceil = math.ceil;
13 local sha1 = require "util.hashes".sha1; 13 local H = require "util.hashes".sha512;
14 14
15 local last_uniq_time = 0; 15 local last_uniq_time = 0;
16 local function uniq_time() 16 local function uniq_time()
17 local new_uniq_time = os_time(); 17 local new_uniq_time = os_time();
18 if last_uniq_time >= new_uniq_time then new_uniq_time = last_uniq_time + 1; end 18 if last_uniq_time >= new_uniq_time then new_uniq_time = last_uniq_time + 1; end
19 last_uniq_time = new_uniq_time; 19 last_uniq_time = new_uniq_time;
20 return new_uniq_time; 20 return new_uniq_time;
21 end 21 end
22 22
23 local function new_random(x) 23 local function new_random(x)
24 return sha1(x..os_clock()..tostring({})); 24 return H(x..os_clock()..tostring({}));
25 end 25 end
26 26
27 local buffer = new_random(uniq_time()); 27 local buffer = new_random(uniq_time());
28 28
29 local function seed(x) 29 local function seed(x)