From 2533568f4cc8a44a9fefe50c68f42350df974970 Mon Sep 17 00:00:00 2001
From: Rainchus <rainmachus@gmail.com>
Date: Wed, 29 Nov 2023 17:37:09 -0600
Subject: [PATCH] frand and messdata.c decompiled

---
 configure.py        |  4 ++--
 include/functions.h |  2 ++
 src/game/frand.c    | 40 ++++++++++++++++++++++++++++++++++
 src/game/messdata.c | 52 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 96 insertions(+), 2 deletions(-)
 create mode 100644 src/game/frand.c
 create mode 100644 src/game/messdata.c

diff --git a/configure.py b/configure.py
index e98c7380..6957c2e5 100755
--- a/configure.py
+++ b/configure.py
@@ -249,10 +249,10 @@ config.libs = [
             Object(NonMatching, "game/hsfman.c"),
             Object(Matching, "game/objmain.c"),
             Object(NonMatching, "game/fault.c"),
-            Object(NonMatching, "game/frand.c"),
+            Object(Matching, "game/frand.c"),
             Object(Matching, "game/ovllist.c"),
             Object(NonMatching, "game/window.c"),
-            Object(NonMatching, "game/messdata.c"),
+            Object(Matching, "game/messdata.c"),
             Object(NonMatching, "game/card.c"),
             Object(NonMatching, "game/armem.c"),
         ],
diff --git a/include/functions.h b/include/functions.h
index 54a992a7..a788fb34 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -187,6 +187,8 @@ void BoardMessCreate(s16, s32, s32);
 void BoardMessKill(void);
 void BoardMessWait(void);
 
+s32 rand8(void);
+
 void fn_8005D8E8(void); 
 void fn_8005DB6C(s16, Vec3f*, s32, f32, f32, s32); 
 void fn_8005E0C0(void);
diff --git a/src/game/frand.c b/src/game/frand.c
new file mode 100644
index 00000000..605ce871
--- /dev/null
+++ b/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;
+}
\ No newline at end of file
diff --git a/src/game/messdata.c b/src/game/messdata.c
new file mode 100644
index 00000000..7f30ba98
--- /dev/null
+++ b/src/game/messdata.c
@@ -0,0 +1,52 @@
+#include "common.h"
+
+void* MessData_MesPtrGet(s32* arg0, u32 arg1) {
+    u16 var2;
+    s32* var_r27;
+    s32 var_r28;
+    s32* temp_r31;
+    s32* var_r26;
+    s32* var_r25;
+    u16* var_r29;
+    s32 var1;
+    u16 var_r24;
+    s32* var_r30;
+    s32 var_r21;
+
+    var2 = arg1 >> 16;
+    temp_r31 = arg0;
+    var1 = *temp_r31++;
+    var_r29 = (u16*)((u8*)arg0 + *temp_r31);
+    
+    var_r28 = var1;
+    while (var_r28 != 0) {
+        if (*var_r29 != var2) {
+            var_r28--;
+            var_r29 += 2;
+            continue;
+        } else {
+            break;
+        }
+    }
+    if (var_r28 == 0) {
+        var_r26 = NULL;
+    } else {
+        temp_r31 = (s32*)((u32)temp_r31 + var_r29[1] * 4);
+        var_r26 = (s32*)((u8*)arg0 + *temp_r31);
+    }
+    var_r27 = var_r26;
+    if (var_r27 != 0) {
+        var_r24 = arg1;
+        var_r30 = var_r27;
+        var_r21 = *var_r30;
+        var_r30++;
+        if (var_r21 <= var_r24) {
+            var_r25 = NULL;
+        } else {
+            var_r30 = var_r30 + var_r24;
+            var_r25 = (s32*)((u8*)var_r27 + *var_r30);
+        }
+        return var_r25;
+    }
+    return 0;
+}