chore: archive early implementations and chunk checker tools

tools/sliming.cpp

@@ -0,0 +1,53 @@
+#pragma GCC optimize("wrapv")
+
+#include <cstdint>
+
+struct JavaRandom {
+    int64_t seed;
+
+    JavaRandom(int64_t seed) : seed((seed ^ 0x5DEECE66DLL) & ((1LL << 48) - 1)) {}
+
+    int32_t next(int bits) {
+        seed = (seed * 0x5DEECE66DLL + 0xBLL) & ((1LL << 48) - 1);
+        return (int32_t)((uint64_t)seed >> (48 - bits));
+    }
+
+    int32_t nextInt(int32_t n) {
+        if ((n & -n) == n)  // n is a power of 2
+            return (int32_t)((n * (int64_t)next(31)) >> 31);
+
+        int32_t bits, val;
+        do {
+            bits = next(31);
+            val = bits % n;
+        } while (bits - val + (n - 1) < 0);
+        return val;
+
+    }
+};
+
+bool isSlimeChunk(int64_t worldSeed, int32_t chunkX, int32_t chunkZ) {
+    int64_t seed = worldSeed +
+                   (int64_t)(chunkX * chunkX * 4987142) +
+                   (int64_t)(chunkX * 5947611) +
+                   (int64_t)(chunkZ * chunkZ) * 4392871LL +
+                   (int64_t)(chunkZ * 389711) ^ 987234911LL;
+    JavaRandom rand(seed);
+    return rand.nextInt(10) == 0;
+}
+
+#include <cstdio>
+#include <cstdlib>
+
+
+int main(int argc, char *argv[]) {
+    if (argc != 4) {
+        return 1;
+    }
+    int64_t worldSeed = atoll(argv[1]);
+    int32_t chunkX = atoi(argv[2]);
+    int32_t chunkZ = atoi(argv[3]);
+    bool isSlime = isSlimeChunk(worldSeed, chunkX, chunkZ);
+    printf("Is Slime Chunk: %s\n", isSlime ? "true" : "false");
+    return 0;
+}