Reorder client src directories

client/src/prng.c

@@ -0,0 +1,39 @@
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+// Burtle Prng - Modified.   42iterations instead of 20.
+// ref: http://burtleburtle.net/bob/rand/smallprng.html
+//-----------------------------------------------------------------------------
+#include "prng.h"
+
+#define rot(x,k) (((x)<<(k))|((x)>>(32-(k))))
+uint32_t burtle_get_mod(prng_ctx *x) {
+    uint32_t e = x->a - rot(x->b, 21);
+    x->a = x->b ^ rot(x->c, 19);
+    x->b = x->c + rot(x->d, 6);
+    x->c = x->d + e;
+    x->d = e + x->a;
+    return x->d;
+}
+
+void burtle_init_mod(prng_ctx *x, uint32_t seed) {
+    x->a = 0xf1ea5eed;
+    x->b = x->c = x->d = seed;
+    for (uint8_t i = 0; i < 42; ++i) {
+        (void)burtle_get_mod(x);
+    }
+}
+
+void burtle_init(prng_ctx *x, uint32_t seed) {
+    uint32_t i;
+    x->a = 0xf1ea5eed, x->b = x->c = x->d = seed;
+    for (i = 0; i < 20; ++i) {
+        (void)burtle_get_mod(x);
+    }
+}
+
+
+uint32_t GetSimplePrng(uint32_t seed) {
+    seed *= 0x19660D;
+    seed += 0x3C6EF35F;
+    return seed;
+}