Remove math.randomseed implementation

See #78

5 files changed, 6 insertions, 30 deletions

diff --git a/README.md b/README.md
index 7e76144..aa54b96 100644
--- a/README.md
+++ b/README.md
@@ -84,6 +84,7 @@ p(L);
 
 ## NYI
 
+- `math.randomseed()`
 - `io.input()`: partially implemented
 - `io.lines()`
 - `io.open()`
diff --git a/package.json b/package.json
index 8aaa972..746ed93 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,6 @@
   },
   "dependencies": {
     "readline-sync": "^1.4.7",
-    "seedrandom": "^2.4.2",
     "sprintf-js": "^1.1.1",
     "strftime": "^0.10.0",
     "tmp": "0.0.31"
diff --git a/src/lmathlib.js b/src/lmathlib.js
index 4a62d52..16e2ad3 100644
--- a/src/lmathlib.js
+++ b/src/lmathlib.js
@@ -1,22 +1,13 @@
 "use strict";
 
-const seedrandom = require('seedrandom');
-
-const lua        = require('./lua.js');
-const lauxlib    = require('./lauxlib.js');
-const llimit     = require('./llimit.js');
-const luaconf    = require('./luaconf.js');
-
-var RNG          = seedrandom();
-
-const math_randomseed = function(L) {
-    RNG = seedrandom(Math.abs(lauxlib.luaL_checknumber(L, 1)));
-    return 0;
-};
+const lua     = require('./lua.js');
+const lauxlib = require('./lauxlib.js');
+const llimit  = require('./llimit.js');
+const luaconf = require('./luaconf.js');
 
 const math_random = function(L) {
     let low, up;
-    let r = RNG();
+    let r = Math.random();
     switch (lua.lua_gettop(L)) {  /* check number of arguments */
         case 0:
             lua.lua_pushnumber(L, r);  /* Number between 0 and 1 */
@@ -252,7 +243,6 @@ const mathlib = {
     "modf":       math_modf,
     "rad":        math_rad,
     "random":     math_random,
-    "randomseed": math_randomseed,
     "sin":        math_sin,
     "sqrt":       math_sqrt,
     "tan":        math_tan,
diff --git a/tests/test-suite/math.js b/tests/test-suite/math.js
index b92d304..ea021d2 100644
--- a/tests/test-suite/math.js
+++ b/tests/test-suite/math.js
@@ -1395,8 +1395,6 @@ test("[test-suite] math: testing -0 and NaN", function (t) {
 
 test("[test-suite] math: test random for floats", function (t) {
     let luaCode = `
-        math.randomseed(0)
-
         do   -- test random for floats
           local max = -math.huge
           local min = math.huge
@@ -1438,8 +1436,6 @@ test("[test-suite] math: test random for floats", function (t) {
 
 test("[test-suite] math: test random for small intervals", function (t) {
     let luaCode = `
-        math.randomseed(0)
-
         do
           local function aux (p, lim)   -- test random for small intervals
             local x1, x2
@@ -1496,8 +1492,6 @@ test("[test-suite] math: test random for small intervals", function (t) {
 
 test("[test-suite] math: test random for large intervals", function (t) {
     let luaCode = `
-        math.randomseed(0)
-
         do
           local function aux(p1, p2)       -- test random for large intervals
             local max = minint
@@ -1556,8 +1550,6 @@ test("[test-suite] math: test random for large intervals", function (t) {
 
 test("[test-suite] math: test random for empty interval", function (t) {
     let luaCode = `
-        math.randomseed(0)
-
         assert(not pcall(math.random, minint + 1, minint))
         assert(not pcall(math.random, maxint, maxint - 1))
         assert(not pcall(math.random, maxint, minint))
@@ -1586,8 +1578,6 @@ test("[test-suite] math: test random for empty interval", function (t) {
 
 test("[test-suite] math: interval too large", function (t) {
     let luaCode = `
-        math.randomseed(0)
-
         assert(not pcall(math.random, minint, 0))
         assert(not pcall(math.random, -1, maxint))
         assert(not pcall(math.random, minint // 2, maxint // 2 + 1))
diff --git a/yarn.lock b/yarn.lock
index 572cb42..cc0c8d1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1825,10 +1825,6 @@ safe-buffer@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.0.1.tgz#d263ca54696cd8a306b5ca6551e92de57918fbe7"
 
-seedrandom@^2.4.2:
-  version "2.4.3"
-  resolved "https://registry.yarnpkg.com/seedrandom/-/seedrandom-2.4.3.tgz#2438504dad33917314bff18ac4d794f16d6aaecc"
-
 "semver@2 || 3 || 4 || 5", semver@^5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"