feat: rewrite datatype to ts

1 files changed, 36 insertions, 0 deletions

diff --git a/src/mersenne.ts b/src/mersenne.ts
new file mode 100644
index 00000000..e7ab78eb
--- /dev/null
+++ b/src/mersenne.ts
@@ -0,0 +1,36 @@
+const Gen = require('../vendor/mersenne').MersenneTwister19937;
+
+export class Mersenne {
+  private gen = new Gen();
+
+  constructor() {
+    this.gen.init_genrand(new Date().getTime() % 1000000000);
+  }
+
+  rand(max, min) {
+    if (max === undefined) {
+      min = 0;
+      max = 32768;
+    }
+
+    return Math.floor(this.gen.genrand_real2() * (max - min) + min);
+  }
+
+  seed(S) {
+    if (typeof S != 'number') {
+      throw new Error('seed(S) must take numeric argument; is ' + typeof S);
+    }
+
+    this.gen.init_genrand(S);
+  }
+
+  seed_array(A) {
+    if (typeof A != 'object') {
+      throw new Error(
+        'seed_array(A) must take array of numbers; is ' + typeof A
+      );
+    }
+
+    this.gen.init_by_array(A, A.length);
+  }
+}