frand and messdata.c decompiled

src/game/frand.c

@@ -0,0 +1,40 @@
+#include "common.h"
+
+u32 frand_seed;
+
+static inline u32 frandom(void)
+{
+    u32 rand = frand_seed;
+    s32 rand2, rand3;
+
+    if (rand == 0) {
+        rand = rand8();
+        rand = rand ^ (s64)OSGetTime();
+        rand ^= 0xD826BC89;
+    }
+
+    rand2 = rand / (u32)0x1F31D;
+    rand3 = rand - (rand2 * 0x1F31D);
+    rand = rand2 * 0xB14;
+    rand =  rand - rand3 * 0x41A7;
+    return rand;
+}
+
+u32 frand(void) {
+    return frand_seed = frandom();
+}
+
+f32 frandf(void) {
+    u32 value = frand();
+    f32 ret;
+    value &= 0x7FFFFFFF;
+    ret = (f32)value/2147483648;
+    return ret;
+}
+
+u32 frandmod(u32 arg0) {
+    u32 ret;
+    frand_seed = frandom();
+    ret = (frand_seed & 0x7FFFFFFF)%arg0;
+    return ret;
+}