replace mulberry with splitmix32, fixes StoneCypher/fsl#1250

src/doc_md/CHANGELOG.long.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file.
 
-1097 merges; 186 releases
+1098 merges; 186 releases
 
 
 
@@ -18,6 +18,21 @@ Published tags:
 
 
 
+ 
+
+ 
+
+## [Untagged] - 10/25/2023 10:58:24 AM
+
+Commit [e1ef14c5268547a18010d378267f7196e186a08c](https://github.com/StoneCypher/jssm/commit/e1ef14c5268547a18010d378267f7196e186a08c)
+
+Author: `John Haugeland <stonecypher@gmail.com>`
+
+  * silence most build warnings
+
+
+
+
 &nbsp;
 
 &nbsp;

src/doc_md/CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file.
 
-1097 merges; 186 releases; Changlogging the last 10 commits; Full changelog at [CHANGELOG.long.md](CHANGELOG.long.md)
+1098 merges; 186 releases; Changlogging the last 10 commits; Full changelog at [CHANGELOG.long.md](CHANGELOG.long.md)
 
 
 
@@ -18,6 +18,21 @@ Published tags:
 
 
 
+ 
+
+ 
+
+## [Untagged] - 10/25/2023 10:58:24 AM
+
+Commit [e1ef14c5268547a18010d378267f7196e186a08c](https://github.com/StoneCypher/jssm/commit/e1ef14c5268547a18010d378267f7196e186a08c)
+
+Author: `John Haugeland <stonecypher@gmail.com>`
+
+  * silence most build warnings
+
+
+
+
 &nbsp;
 
 &nbsp;
@@ -174,21 +189,4 @@ updated-dependencies:
 - dependency-name: xml2js
   dependency-type: direct:development
 ...
-  * Signed-off-by: dependabot[bot] <support@github.com>
-
-
-
-
-&nbsp;
-
-&nbsp;
-
-<a name="5__88__4" />
-
-## [5.88.4] - 2/7/2023 3:52:11 PM
-
-Commit [ef4285a2699696409cfd36f3ed5b63f67f568f34](https://github.com/StoneCypher/jssm/commit/ef4285a2699696409cfd36f3ed5b63f67f568f34)
-
-Author: `John Haugeland <stonecypher@gmail.com>`
-
-  * cleanup and bumps
+  * Signed-off-by: dependabot[bot] <support@github.com>

src/ts/jssm_util.ts

@@ -199,25 +199,36 @@ const named_hook_name = (from: string, to: string, action: string): string =>
 
 /*******
  *
- *  Creates a Mulberry32 random generator.  Used by the randomness test suite.
+ *  Creates a SplitMix32 random generator.  Used by the randomness test suite.
  *
- *  Sourced from `bryc` at StackOverflow: https://stackoverflow.com/a/47593316/763127
+ *  Sourced from `bryc`: https://github.com/bryc/code/blob/master/jshash/PRNGs.md#splitmix32
+ *
+ *  Replaces the Mulberry generator, which was found to have problems
  *
  */
 
-const make_mulberry_rand = (a?: number | undefined) =>
+function gen_splitmix32(a? : number | undefined) {
 
-  () => {
+  if (a === undefined) {
+    a = new Date().getTime();
+  }
 
-    if (a === undefined) { a = new Date().getTime(); }
+  return function() {
 
-    let t  = a += 0x6D2B79F5;
-        t  = Math.imul(t ^ t >>> 15, t | 1);
-        t ^= t + Math.imul(t ^ t >>> 7, t | 61);
+    a |= 0;
+    a  = a + 0x9e3779b9 | 0;
 
-    return ((t ^ t >>> 14) >>> 0) / 4294967296;
+    var t = a ^ a >>> 16;
+        t = Math.imul(t, 0x21f0aaad);
 
-  };
+        t = t ^ t >>> 15;
+        t = Math.imul(t, 0x735a2d97);
+
+    return ((t = t ^ t >>> 15) >>> 0) / 4294967296;
+
+  }
+
+}
 
 
 
@@ -306,13 +317,15 @@ function find_repeated<T>(arr: T[]): [T, number][] {
 
 
 export {
+
   seq,
   unique, find_repeated,
   arr_uniq_p,
   histograph, weighted_histo_key,
   weighted_rand_select, weighted_sample_select,
   array_box_if_string,
   name_bind_prop_and_state, hook_name, named_hook_name,
-  make_mulberry_rand
+  gen_splitmix32
+
 };
 

src/ts/tests/util.spec.ts

@@ -3,7 +3,7 @@ import {
   seq,
   unique,
   find_repeated,
-  make_mulberry_rand,
+  gen_splitmix32,
   name_bind_prop_and_state
 } from '../jssm_util';
 
@@ -82,15 +82,15 @@ describe('seq', () => {
 
 
 
-describe('make_mulberry_rand', () => {
+describe('gen_splitmix32', () => {
 
 
 
   seq(3).map(n =>
 
     test(`Seed ${n} - Generates 500 numbers [0,1)`, () => {
 
-      const rnd  = make_mulberry_rand(n);
+      const rnd  = gen_splitmix32(n);
       let   fail = false;
 
       seq(500).forEach(_ => {
@@ -111,13 +111,13 @@ describe('make_mulberry_rand', () => {
 
 
 
-  const rnd = (n) => Math.floor(make_mulberry_rand( new Date().getTime()+n )() * Number.MAX_SAFE_INTEGER );
+  const rnd = (n) => Math.floor(gen_splitmix32( new Date().getTime()+n )() * Number.MAX_SAFE_INTEGER );
 
   [ rnd(0), rnd(1), rnd(2), rnd(3), rnd(4) ].map( n =>
 
     test(`Seed ${n} - Generates 500 numbers [0,1)`, () => {
 
-      const rnd  = make_mulberry_rand(n);
+      const rnd  = gen_splitmix32(n);
       let   fail = false;
 
       seq(500).forEach(_ => {
@@ -140,7 +140,7 @@ describe('make_mulberry_rand', () => {
 
   test(`Seed undefined - Generates 500 numbers [0,1)`, () => {
 
-    const rnd  = make_mulberry_rand();
+    const rnd  = gen_splitmix32();
     let   fail = false;
 
     seq(500).forEach(_ => {

src/ts/version.ts

@@ -1,5 +1,5 @@
 
-const version    : string = "5.89.3",
-      build_time : number = 1698256594220;
+const version    : string = "5.89.4",
+      build_time : number = 1698257988350;
 
 export { version, build_time };