From 4cdc19b59005f629f74e74e9b23a1a4a8b2f8033 Mon Sep 17 00:00:00 2001
From: Pabloader <pabloader@pabloader.ru>
Date: Mon, 12 May 2025 08:03:55 +0000
Subject: [PATCH] stdlibs random for life

---
 src/games/life/index.ts |  2 +-
 src/games/life/life.c   | 33 ++-------------------------------
 2 files changed, 3 insertions(+), 32 deletions(-)

diff --git a/src/games/life/index.ts b/src/games/life/index.ts
index 76b9b63..6ecfe92 100644
--- a/src/games/life/index.ts
+++ b/src/games/life/index.ts
@@ -12,7 +12,7 @@ const step = life.step as CallableFunction;
 let pixels: Uint8Array;
 
 export default function main() {
-    const pixelsPtr = life.initField(Date.now());
+    const pixelsPtr = life.initField();
     pixels = new Uint8Array(life.memory.buffer, pixelsPtr, width * height * 4);
 
     console.log(life, pixels.length);
diff --git a/src/games/life/life.c b/src/games/life/life.c
index 15bf45c..74289c6 100644
--- a/src/games/life/life.c
+++ b/src/games/life/life.c
@@ -8,7 +8,6 @@ static uint8_t* field;
 static uint8_t* nextField;
 static uint8_t* pixels;
 
-static uint8_t rand8(void);
 static int countNeighbours(int x, int y);
 
 EXPORT(getWidth) int get_width(void) { return width; }
@@ -66,42 +65,14 @@ static int countNeighbours(int x, int y) {
     return count;
 }
 
-/** Random generator implementation from https://stackoverflow.com/a/16761955 */
-#define STATE_BYTES 7
-#define MULT 0x13B /* for STATE_BYTES==6 only */
-#define MULT_LO (MULT & 255)
-#define MULT_HI (MULT & 256)
-
-static uint8_t rand_state[STATE_BYTES] = {0x87, 0xdd, 0xdc, 0x10, 0x35, 0xbc, 0x5c};
-
-static uint8_t rand8(void) {
-    static uint16_t c = 0x42;
-    static uint32_t i = 0;
-    uint16_t t;
-    uint8_t x;
-
-    x = rand_state[i];
-    t = (uint16_t)x * MULT_LO + c;
-    c = t >> 8;
-#if MULT_HI
-    c += x;
-#endif
-    x = t & 255;
-    rand_state[i] = x;
-    if (++i >= sizeof(rand_state))
-        i = 0;
-    return x;
-}
-
-EXPORT(initField) uint8_t* init_field(uint32_t randomSeed) {
-    *((uint32_t*)&rand_state[STATE_BYTES - sizeof(uint32_t)]) = randomSeed; // Voodoo
 
+EXPORT(initField) uint8_t* init_field(void) {
     field = malloc(width * height);
     nextField = malloc(width * height);
     pixels = malloc(width * height * 4);
 
     for (int i = 0; i < width * height; i++) {
-        field[i] = rand8() & 1;
+        field[i] = rand() & 1;
     }
 
     return pixels;