partially decompile dewford_trend.c and record_mixing.c (#78)

* start decompiling dewford_trend

* figure out some gSaveBlock1 members

* decompile more functions

* decompile sub_80FA4E4

* start decompiling record_mixing.c

* Decompile more code

* decompile more functions

* tabs to spaces

1 files changed, 644 insertions, 0 deletions

diff --git a/src/dewford_trend.c b/src/dewford_trend.c
new file mode 100644
index 000000000..63ae4157a
--- /dev/null
+++ b/src/dewford_trend.c
@@ -0,0 +1,644 @@
+#include "global.h"
+#include "link.h"
+#include "rng.h"
+
+
+extern u8 GetLinkPlayerCount(void);
+extern u16 sub_80EB72C(u16);
+extern u8 ConvertEasyChatWordsToString(u8 *dst, u16 *words, u16, u16);
+extern u8 FlagGet(u16);
+extern u8 FlagSet(u16);
+
+extern struct EasyChatPair unk_2007800[5];
+extern struct EasyChatPair unk_2007900[5];
+extern u16 gScriptResult;
+extern u16 gUnknown_0202E8CC;
+
+void sub_80FA740(struct EasyChatPair *);
+void sub_80FA46C(struct EasyChatPair *, u16, u8);
+bool8 sub_80FA670(struct EasyChatPair *, struct EasyChatPair *, u8);
+bool8 IsEasyChatPairEqual(u16 *, u16 *);
+bool8 SB1ContainsWords(u16 *);
+
+void sub_80FA17C(void)
+{
+    u16 i;
+    
+    for(i = 0; i < 5; i++)
+    {
+        gSaveBlock1.easyChatPairs[i].words[0] = sub_80EB72C(10);
+        
+        if(Random() & 1)
+            gSaveBlock1.easyChatPairs[i].words[1] = sub_80EB72C(12);
+        else
+            gSaveBlock1.easyChatPairs[i].words[1] = sub_80EB72C(13);
+        
+        gSaveBlock1.easyChatPairs[i].unk1_6 = Random() & 1;
+        sub_80FA740(&gSaveBlock1.easyChatPairs[i]);
+    }
+    sub_80FA46C(gSaveBlock1.easyChatPairs, 5, 0);
+}
+
+#ifdef NONMATCHING
+void sub_80FA220(u16 a)
+{
+    u16 i;
+    u32 sp0;
+    u32 sp4;
+    
+    if(a != 0)
+    {
+        sp0 = a * 5;
+        
+        for(i = 0; i < 5; i++)
+        {
+            //_080FA24A
+            u32 r2 = sp0;
+            u32 r4;
+            
+            if(gSaveBlock1.easyChatPairs[i].unk1_6 == 0)
+            {
+                if(gSaveBlock1.easyChatPairs[i].unk0_0 >= r2)
+                {
+                    gSaveBlock1.easyChatPairs[i].unk0_0 -= r2;
+                    if(gSaveBlock1.easyChatPairs[i].unk0_0 == 0)
+                        gSaveBlock1.easyChatPairs[i].unk1_6 = 1;
+                    continue;
+                }
+                //_080FA290
+                r2 -= gSaveBlock1.easyChatPairs[i].unk0_0;
+                gSaveBlock1.easyChatPairs[i].unk1_6 = 1;
+            }
+            //_080FA2A0
+            r4 = gSaveBlock1.easyChatPairs[i].unk0_0 + r2;
+            if(r4 > gSaveBlock1.easyChatPairs[i].unk0_7)
+            {
+                sp4 = r4 % gSaveBlock1.easyChatPairs[i].unk0_7;
+                r4 = r4 / gSaveBlock1.easyChatPairs[i].unk0_7;
+                
+                if(r4 == 0)
+                    gSaveBlock1.easyChatPairs[i].unk1_6 = 1;
+                else
+                    gSaveBlock1.easyChatPairs[i].unk1_6 = 0;
+                
+                
+                if(gSaveBlock1.easyChatPairs[i].unk1_6)
+                {
+                    gSaveBlock1.easyChatPairs[i].unk0_0 += sp4;
+                    continue;
+                }
+                //_080FA2FA
+                gSaveBlock1.easyChatPairs[i].unk0_7 -= sp4;
+                continue;
+            }
+            //_080FA310
+            gSaveBlock1.easyChatPairs[i].unk0_0 = r4;
+            
+            if(gSaveBlock1.easyChatPairs[i].unk0_0 == gSaveBlock1.easyChatPairs[i].unk0_7)
+                gSaveBlock1.easyChatPairs[i].unk1_6 = 0;
+        }
+        sub_80FA46C(gSaveBlock1.easyChatPairs, 5, 0);
+    }
+    //_080FA34E
+}
+
+#else
+__attribute__((naked))
+void sub_80FA220(u16 a)
+{
+    asm(".syntax unified\n\
+	push {r4-r7,lr}\n\
+	mov r7, r10\n\
+	mov r6, r9\n\
+	mov r5, r8\n\
+	push {r5-r7}\n\
+	sub sp, 0x8\n\
+	lsls r0, 16\n\
+	lsrs r1, r0, 16\n\
+	cmp r1, 0\n\
+	bne _080FA236\n\
+	b _080FA34E\n\
+_080FA236:\n\
+	lsls r0, r1, 2\n\
+	adds r0, r1\n\
+	str r0, [sp]\n\
+	movs r0, 0\n\
+	mov r10, r0\n\
+	movs r1, 0x7F\n\
+	mov r9, r1\n\
+	movs r2, 0x80\n\
+	negs r2, r2\n\
+	mov r8, r2\n\
+_080FA24A:\n\
+	ldr r2, [sp]\n\
+	mov r4, r10\n\
+	lsls r0, r4, 3\n\
+	ldr r1, _080FA28C @ =gSaveBlock1 + 0x2DD4\n\
+	adds r5, r0, r1\n\
+	ldrb r6, [r5, 0x1]\n\
+	movs r0, 0x40\n\
+	ands r0, r6\n\
+	cmp r0, 0\n\
+	bne _080FA2A0\n\
+	ldrb r4, [r5]\n\
+	lsls r3, r4, 25\n\
+	lsrs r1, r3, 25\n\
+	lsls r0, r2, 16\n\
+	lsrs r0, 16\n\
+	cmp r1, r0\n\
+	bcc _080FA290\n\
+	adds r0, r1, 0\n\
+	subs r0, r2\n\
+	mov r2, r9\n\
+	ands r0, r2\n\
+	mov r1, r8\n\
+	ands r1, r4\n\
+	orrs r1, r0\n\
+	strb r1, [r5]\n\
+	movs r0, 0x7F\n\
+	ands r1, r0\n\
+	cmp r1, 0\n\
+	bne _080FA336\n\
+	movs r0, 0x40\n\
+	orrs r0, r6\n\
+	b _080FA334\n\
+	.align 2, 0\n\
+_080FA28C: .4byte gSaveBlock1 + 0x2DD4\n\
+_080FA290:\n\
+	lsrs r0, r3, 25\n\
+	subs r2, r0\n\
+	mov r0, r8\n\
+	ands r0, r4\n\
+	strb r0, [r5]\n\
+	movs r0, 0x40\n\
+	orrs r0, r6\n\
+	strb r0, [r5, 0x1]\n\
+_080FA2A0:\n\
+	ldrb r7, [r5]\n\
+	lsls r0, r7, 25\n\
+	lsrs r0, 25\n\
+	adds r4, r0, r2\n\
+	ldrh r0, [r5]\n\
+	lsls r6, r0, 18\n\
+	lsls r0, r4, 16\n\
+	lsrs r0, 16\n\
+	lsrs r1, r6, 25\n\
+	cmp r0, r1\n\
+	bls _080FA310\n\
+	adds r0, r4, 0\n\
+	bl __umodsi3\n\
+	adds r3, r0, 0\n\
+	lsrs r1, r6, 25\n\
+	adds r0, r4, 0\n\
+	str r3, [sp, 0x4]\n\
+	bl __udivsi3\n\
+	adds r4, r0, 0\n\
+	movs r0, 0x1\n\
+	eors r4, r0\n\
+	ands r4, r0\n\
+	lsls r2, r4, 6\n\
+	ldrb r0, [r5, 0x1]\n\
+	movs r4, 0x41\n\
+	negs r4, r4\n\
+	adds r1, r4, 0\n\
+	ands r0, r1\n\
+	orrs r0, r2\n\
+	strb r0, [r5, 0x1]\n\
+	movs r1, 0x40\n\
+	ands r0, r1\n\
+	ldr r3, [sp, 0x4]\n\
+	cmp r0, 0\n\
+	beq _080FA2FA\n\
+	adds r1, r3, 0\n\
+	mov r0, r9\n\
+	ands r1, r0\n\
+	mov r0, r8\n\
+	ands r0, r7\n\
+	orrs r0, r1\n\
+	strb r0, [r5]\n\
+	b _080FA336\n\
+_080FA2FA:\n\
+	ldrh r0, [r5]\n\
+	lsls r0, 18\n\
+	lsrs r0, 25\n\
+	subs r0, r3\n\
+	mov r1, r9\n\
+	ands r0, r1\n\
+	mov r1, r8\n\
+	ands r1, r7\n\
+	orrs r1, r0\n\
+	strb r1, [r5]\n\
+	b _080FA336\n\
+_080FA310:\n\
+	mov r2, r9\n\
+	ands r4, r2\n\
+	mov r0, r8\n\
+	ands r0, r7\n\
+	orrs r0, r4\n\
+	strb r0, [r5]\n\
+	lsls r0, 25\n\
+	ldrh r1, [r5]\n\
+	lsls r1, 18\n\
+	lsrs r0, 25\n\
+	lsrs r1, 25\n\
+	cmp r0, r1\n\
+	bne _080FA336\n\
+	ldrb r0, [r5, 0x1]\n\
+	movs r4, 0x41\n\
+	negs r4, r4\n\
+	adds r1, r4, 0\n\
+	ands r0, r1\n\
+_080FA334:\n\
+	strb r0, [r5, 0x1]\n\
+_080FA336:\n\
+	mov r0, r10\n\
+	adds r0, 0x1\n\
+	lsls r0, 16\n\
+	lsrs r0, 16\n\
+	mov r10, r0\n\
+	cmp r0, 0x4\n\
+	bls _080FA24A\n\
+	ldr r0, _080FA360 @ =gSaveBlock1 + 0x2DD4\n\
+	movs r1, 0x5\n\
+	movs r2, 0\n\
+	bl sub_80FA46C\n\
+_080FA34E:\n\
+	add sp, 0x8\n\
+	pop {r3-r5}\n\
+	mov r8, r3\n\
+	mov r9, r4\n\
+	mov r10, r5\n\
+	pop {r4-r7}\n\
+	pop {r0}\n\
+	bx r0\n\
+	.align 2, 0\n\
+_080FA360: .4byte gSaveBlock1 + 0x2DD4\n\
+	.syntax divided\n");
+}
+#endif
+
+bool8 sub_80FA364(u16 *a)
+{
+    struct EasyChatPair s = {0};
+    u16 i;
+    
+    if(!SB1ContainsWords(a))
+    {
+        if(!FlagGet(0x833))
+        {
+            FlagSet(0x833);
+            if(!FlagGet(0x834))
+            {
+                gSaveBlock1.easyChatPairs[0].words[0] = a[0];
+                gSaveBlock1.easyChatPairs[0].words[1] = a[1];
+                return 1;
+            }
+        }
+        
+        //_080FA3C8
+        s.words[0] = a[0];
+        s.words[1] = a[1];
+        s.unk1_6 = 1;
+        sub_80FA740(&s);
+        
+        for(i = 0; i < 5; i++)
+        {
+            if(sub_80FA670(&s, &gSaveBlock1.easyChatPairs[i], 0))
+            {
+                u16 r3 = 4;
+                
+                while(r3 > i)
+                {
+                    gSaveBlock1.easyChatPairs[r3] = gSaveBlock1.easyChatPairs[r3 - 1];
+                    r3--;
+                }
+                gSaveBlock1.easyChatPairs[i] = s;
+                return (i == 0);
+            }
+            //_080FA450
+        }
+        gSaveBlock1.easyChatPairs[4] = s;
+    }
+    return 0;
+}
+
+void sub_80FA46C(struct EasyChatPair *s, u16 b, u8 c)
+{
+    u16 h;
+    
+    for(h = 0; h < b; h++)
+    {
+        u16 i;
+        
+        for(i = h + 1; i < b; i++)
+        {
+            if(sub_80FA670(&s[i], &s[h], c))
+            {
+                struct EasyChatPair temp;
+                
+                temp = s[i];
+                s[i] = s[h];
+                s[h] = temp;
+            }
+        }
+    }
+}
+
+#ifdef NONMATCHING
+void sub_80FA4E4(u8 *a, u32 b)
+{
+    u16 i;
+    u16 j;
+    u16 r7;
+    struct EasyChatPair *src;
+    struct EasyChatPair *dst;
+    u16 players = GetLinkPlayerCount();
+    
+    for(i = 0; i < players; i++)
+        memcpy(&unk_2007800[i * 5], a + i * b, 40);
+    
+    //_080FA520
+    
+    src = unk_2007800;
+    //dst = unk_2007900
+    dst = (u8 *)src + 0x100;   //ToDo: Get this part to match
+    
+    r7 = 0;
+    //_080FA530
+    for(i = 0; i < players; i++)
+    {
+        for(j = 0; j < 5; j++)
+        {
+            s16 foo = sub_80FA828(src, r7);
+            if(foo < 0)
+            {
+                *(dst++) = *src;
+                r7++;
+            }
+            //_080FA558
+            else
+            {
+                if(unk_2007900[foo].unk0_0 < src->unk0_0)
+                {
+                    unk_2007900[foo] = *src;
+                }
+            }
+            //_080FA572
+            src++;
+        }
+    }
+    //_080FA588
+    sub_80FA46C(unk_2007900, r7, 2);
+    src = unk_2007900;
+    dst = gSaveBlock1.easyChatPairs;
+    for(i = 0; i < 5; i++)
+        *(dst++) = *(src++);
+}
+#else
+__attribute__((naked))
+void sub_80FA4E4(u8 *a, u32 b)
+{
+    asm(".syntax unified\n\
+	push {r4-r7,lr}\n\
+	mov r7, r8\n\
+	push {r7}\n\
+	sub sp, 0x4\n\
+	adds r6, r0, 0\n\
+	adds r5, r1, 0\n\
+	bl GetLinkPlayerCount\n\
+	lsls r0, 24\n\
+	lsrs r0, 24\n\
+	mov r8, r0\n\
+	movs r4, 0\n\
+	cmp r4, r8\n\
+	bcs _080FA520\n\
+_080FA500:\n\
+	lsls r0, r4, 2\n\
+	adds r0, r4\n\
+	lsls r0, 3\n\
+	ldr r1, _080FA554 @ =0x02007800\n\
+	adds r0, r1\n\
+	adds r1, r4, 0\n\
+	muls r1, r5\n\
+	adds r1, r6, r1\n\
+	movs r2, 0x28\n\
+	bl memcpy\n\
+	adds r0, r4, 0x1\n\
+	lsls r0, 16\n\
+	lsrs r4, r0, 16\n\
+	cmp r4, r8\n\
+	bcc _080FA500\n\
+_080FA520:\n\
+	ldr r5, _080FA554 @ =0x02007800\n\
+	movs r0, 0x80\n\
+	lsls r0, 1\n\
+	adds r3, r5, r0\n\
+	movs r7, 0\n\
+	movs r4, 0\n\
+	cmp r4, r8\n\
+	bcs _080FA588\n\
+_080FA530:\n\
+	movs r6, 0\n\
+_080FA532:\n\
+	adds r0, r5, 0\n\
+	adds r1, r7, 0\n\
+	str r3, [sp]\n\
+	bl sub_80FA828\n\
+	lsls r0, 16\n\
+	asrs r0, 16\n\
+	ldr r3, [sp]\n\
+	cmp r0, 0\n\
+	bge _080FA558\n\
+	ldr r0, [r5]\n\
+	ldr r1, [r5, 0x4]\n\
+	stm r3!, {r0,r1}\n\
+	adds r0, r7, 0x1\n\
+	lsls r0, 16\n\
+	lsrs r7, r0, 16\n\
+	b _080FA572\n\
+	.align 2, 0\n\
+_080FA554: .4byte 0x02007800\n\
+_080FA558:\n\
+	lsls r1, r0, 3\n\
+	ldr r0, _080FA5B4 @ =0x02007900\n\
+	adds r2, r1, r0\n\
+	ldrb r1, [r2]\n\
+	lsls r1, 25\n\
+	ldrb r0, [r5]\n\
+	lsls r0, 25\n\
+	cmp r1, r0\n\
+	bcs _080FA572\n\
+	ldr r0, [r5]\n\
+	ldr r1, [r5, 0x4]\n\
+	str r0, [r2]\n\
+	str r1, [r2, 0x4]\n\
+_080FA572:\n\
+	adds r5, 0x8\n\
+	adds r0, r6, 0x1\n\
+	lsls r0, 16\n\
+	lsrs r6, r0, 16\n\
+	cmp r6, 0x4\n\
+	bls _080FA532\n\
+	adds r0, r4, 0x1\n\
+	lsls r0, 16\n\
+	lsrs r4, r0, 16\n\
+	cmp r4, r8\n\
+	bcc _080FA530\n\
+_080FA588:\n\
+	ldr r4, _080FA5B4 @ =0x02007900\n\
+	adds r0, r4, 0\n\
+	adds r1, r7, 0\n\
+	movs r2, 0x2\n\
+	bl sub_80FA46C\n\
+	adds r5, r4, 0\n\
+	ldr r3, _080FA5B8 @ =gSaveBlock1 + 0x2DD4\n\
+	movs r4, 0\n\
+_080FA59A:\n\
+	ldm r5!, {r0,r1}\n\
+	stm r3!, {r0,r1}\n\
+	adds r0, r4, 0x1\n\
+	lsls r0, 16\n\
+	lsrs r4, r0, 16\n\
+	cmp r4, 0x4\n\
+	bls _080FA59A\n\
+	add sp, 0x4\n\
+	pop {r3}\n\
+	mov r8, r3\n\
+	pop {r4-r7}\n\
+	pop {r0}\n\
+	bx r0\n\
+	.align 2, 0\n\
+_080FA5B4: .4byte 0x02007900\n\
+_080FA5B8: .4byte gSaveBlock1 + 0x2DD4\n\
+    .syntax divided\n");
+}
+#endif
+
+void sub_80FA5BC(void)
+{
+    struct EasyChatPair *s = &gSaveBlock1.easyChatPairs[gUnknown_0202E8CC];
+    
+    ConvertEasyChatWordsToString(gStringVar1, s->words, 2, 1);
+}
+
+void sub_80FA5E4(void)
+{
+    u16 result = 0;
+    
+    if (gSaveBlock1.easyChatPairs[0].unk0_0 - gSaveBlock1.easyChatPairs[1].unk0_0 < 2)
+    {
+        asm("":::"r2"); //Force the compiler to store address of gSaveBlock1 in r3 instead of r2
+        if (!gSaveBlock1.easyChatPairs[0].unk1_6 && gSaveBlock1.easyChatPairs[1].unk1_6)
+            result = 1;
+    }
+    gScriptResult = result;
+}
+
+void sub_80FA648(void)
+{
+    gScriptResult = (gSaveBlock1.easyChatPairs[0].words[0] + gSaveBlock1.easyChatPairs[0].words[1]) & 7;
+}
+
+bool8 sub_80FA670(struct EasyChatPair *a, struct EasyChatPair *b, u8 c)
+{
+    switch(c)
+    {
+    case 0:
+        if(a->unk0_0 > b->unk0_0)
+            return 1;
+        if(a->unk0_0 < b->unk0_0)
+            return 0;
+        if(a->unk0_7 > b->unk0_7)
+            return 1;
+        if(a->unk0_7 < b->unk0_7)
+            return 0;
+        break;
+    case 1:
+        if(a->unk0_7 > b->unk0_7)
+            return 1;
+        if(a->unk0_7 < b->unk0_7)
+            return 0;
+        if(a->unk0_0 > b->unk0_0)
+            return 1;
+        if(a->unk0_0 < b->unk0_0)
+            return 0;
+        break;
+    case 2:
+        if(a->unk0_0 > b->unk0_0)
+            return 1;
+        if(a->unk0_0 < b->unk0_0)
+            return 0;
+        if(a->unk0_7 > b->unk0_7)
+            return 1;
+        if(a->unk0_7 < b->unk0_7)
+            return 0;
+        if(a->unk2 > b->unk2)
+            return 1;
+        if(a->unk2 < b->unk2)
+            return 0;
+        if(a->words[0] > b->words[0])
+            return 1;
+        if(a->words[0] < b->words[0])
+            return 0;
+        if(a->words[1] > b->words[1])
+            return 1;
+        if(a->words[1] < b->words[1])
+            return 0;
+        return 1;
+    }
+    return Random() & 1;
+}
+
+void sub_80FA740(struct EasyChatPair *s)
+{
+    u16 r4;
+    
+    r4 = Random() % 98;
+    if(r4 > 50)
+    {
+        r4 = Random() % 98;
+        if(r4 > 80)
+            r4 = Random() % 98;
+    }
+    s->unk0_7 = r4 + 30;
+    s->unk0_0 = (Random() % (r4 + 1)) + 30;
+    s->unk2 = Random();
+}
+
+bool8 SB1ContainsWords(u16 *a)
+{
+    u16 i;
+    
+    for(i = 0; i < 5; i++)
+    {
+        if(IsEasyChatPairEqual(a, gSaveBlock1.easyChatPairs[i].words) != 0)
+            return TRUE;
+    }
+    return FALSE;
+}
+
+bool8 IsEasyChatPairEqual(u16 *words1, u16 *words2)
+{
+    u16 i;
+    
+    for(i = 0; i < 2; i++)
+    {
+        if(*(words1++) != *(words2++))
+            return FALSE;
+    }
+    return TRUE;
+}
+
+s16 sub_80FA828(struct EasyChatPair *a, u16 b)
+{
+    s16 i;
+    struct EasyChatPair *s = unk_2007900;
+    
+    for(i = 0; i < b; i++)
+    {
+        if(IsEasyChatPairEqual(a->words, s->words))
+            return i;
+        s++;
+    }
+    return -1;
+}