document most of the BMG file format

5 files changed, 212 insertions, 48 deletions

diff --git a/config/eur/arm9/symbols.txt b/config/eur/arm9/symbols.txt
index a98893d2..81d11530 100644
--- a/config/eur/arm9/symbols.txt
+++ b/config/eur/arm9/symbols.txt
@@ -1304,7 +1304,7 @@ func_0202a8dc kind:function(arm,size=0x1cc) addr:0x202a8dc
 func_0202aaa8 kind:function(arm,size=0x40) addr:0x202aaa8
 func_0202aae8 kind:function(thumb,size=0x10) addr:0x202aae8
 func_0202aaf8 kind:function(thumb,size=0x40) addr:0x202aaf8
-_Z13func_0202ab38i kind:function(thumb,size=0x10) addr:0x202ab38
+_Z13func_0202ab38Pj kind:function(thumb,size=0x10) addr:0x202ab38
 func_0202ab48 kind:function(thumb,size=0x4) addr:0x202ab48
 func_0202ab4c kind:function(thumb,size=0x8) addr:0x202ab4c
 func_0202ab54 kind:function(thumb,size=0x10) addr:0x202ab54
@@ -1395,7 +1395,7 @@ func_0202d164 kind:function(thumb,size=0x60) addr:0x202d164
 func_0202d1c4 kind:function(thumb,size=0x58) addr:0x202d1c4
 func_0202d21c kind:function(thumb,size=0x20) addr:0x202d21c
 func_0202d23c kind:function(thumb,size=0x180) addr:0x202d23c
-func_0202d3bc kind:function(thumb,size=0xb8) addr:0x202d3bc
+_Z13func_0202d3bciPjPciibii kind:function(thumb,size=0xb8) addr:0x202d3bc
 func_0202d474 kind:function(thumb,size=0xdc) addr:0x202d474
 _Z13func_0202d550iPjPciii kind:function(thumb,size=0x1c) addr:0x202d550
 func_0202d56c kind:function(thumb,size=0x24) addr:0x202d56c
@@ -1821,10 +1821,10 @@ func_020370e8 kind:function(arm,size=0x70) addr:0x20370e8
 func_02037158 kind:function(arm,size=0x20) addr:0x2037158
 func_02037178 kind:function(arm,size=0x38) addr:0x2037178
 func_020371b0 kind:function(arm,size=0x4) addr:0x20371b0
-_Z13func_020371b4P11UnknownData kind:function(thumb,size=0x14) addr:0x20371b4
-_Z13func_020371c8P11UnknownDataPji kind:function(thumb,size=0x90) addr:0x20371c8
-_Z13func_02037258P11UnknownDatai kind:function(arm,size=0x34) addr:0x2037258
-_Z13func_0203728cP11UnknownDatai kind:function(arm,size=0x64) addr:0x203728c
+_Z13func_020371b4P11BMGFileInfo kind:function(thumb,size=0x14) addr:0x20371b4
+_Z13func_020371c8P11BMGFileInfoPji kind:function(thumb,size=0x90) addr:0x20371c8
+_Z13func_02037258P11BMGFileInfoi kind:function(arm,size=0x34) addr:0x2037258
+_Z13func_0203728cP11BMGFileInfoi kind:function(arm,size=0x64) addr:0x203728c
 _ZN14MessageManager13func_020372f0Eiii kind:function(thumb,size=0xc4) addr:0x20372f0
 func_020373b4 kind:function(thumb,size=0x38) addr:0x20373b4
 func_020373ec kind:function(arm,size=0x60) addr:0x20373ec
diff --git a/config/usa/arm9/symbols.txt b/config/usa/arm9/symbols.txt
index d597cc11..1ddc3578 100644
--- a/config/usa/arm9/symbols.txt
+++ b/config/usa/arm9/symbols.txt
@@ -1304,7 +1304,7 @@ func_0202a8dc kind:function(arm,size=0x1cc) addr:0x202a8dc
 func_0202aaa8 kind:function(arm,size=0x40) addr:0x202aaa8
 func_0202aae8 kind:function(thumb,size=0x10) addr:0x202aae8
 func_0202aaf8 kind:function(thumb,size=0x28) addr:0x202aaf8
-_Z13func_0202ab38i kind:function(thumb,size=0x10) addr:0x202ab20
+_Z13func_0202ab38Pj kind:function(thumb,size=0x10) addr:0x202ab20
 func_0202ab48 kind:function(thumb,size=0x4) addr:0x202ab30
 func_0202ab4c kind:function(thumb,size=0x8) addr:0x202ab34
 func_0202ab54 kind:function(thumb,size=0x10) addr:0x202ab3c
@@ -1395,7 +1395,7 @@ func_0202d164 kind:function(thumb,size=0x74) addr:0x202d14c
 func_0202d1c4 kind:function(thumb,size=0x58) addr:0x202d1c0
 func_0202d21c kind:function(thumb,size=0x20) addr:0x202d218
 func_0202d23c kind:function(thumb,size=0x180) addr:0x202d238
-func_0202d3bc kind:function(thumb,size=0xb8) addr:0x202d3b8
+_Z13func_0202d3bciPjPciibii kind:function(thumb,size=0xb8) addr:0x202d3b8
 func_0202d474 kind:function(thumb,size=0xdc) addr:0x202d470
 _Z13func_0202d550iPjPciii kind:function(thumb,size=0x1c) addr:0x202d54c
 func_0202d56c kind:function(thumb,size=0x24) addr:0x202d568
@@ -1821,10 +1821,10 @@ func_020370e8 kind:function(arm,size=0x70) addr:0x20370a4
 func_02037158 kind:function(arm,size=0x20) addr:0x2037114
 func_02037178 kind:function(arm,size=0x38) addr:0x2037134
 func_020371b0 kind:function(arm,size=0x4) addr:0x203716c
-_Z13func_020371b4P11UnknownData kind:function(thumb,size=0x14) addr:0x2037170
-_Z13func_020371c8P11UnknownDataPji kind:function(thumb,size=0x90) addr:0x2037184
-_Z13func_02037258P11UnknownDatai kind:function(arm,size=0x34) addr:0x2037214
-_Z13func_0203728cP11UnknownDatai kind:function(arm,size=0x64) addr:0x2037248
+_Z13func_020371b4P11BMGFileInfo kind:function(thumb,size=0x14) addr:0x2037170
+_Z13func_020371c8P11BMGFileInfoPji kind:function(thumb,size=0x90) addr:0x2037184
+_Z13func_02037258P11BMGFileInfoi kind:function(arm,size=0x34) addr:0x2037214
+_Z13func_0203728cP11BMGFileInfoi kind:function(arm,size=0x64) addr:0x2037248
 _ZN14MessageManager13func_020372f0Eiii kind:function(thumb,size=0xc4) addr:0x20372ac
 func_020373b4 kind:function(thumb,size=0x38) addr:0x2037370
 func_020373ec kind:function(arm,size=0x60) addr:0x20373a8
diff --git a/include/Message/BMG.hpp b/include/Message/BMG.hpp
new file mode 100644
index 00000000..02bf3df2
--- /dev/null
+++ b/include/Message/BMG.hpp
@@ -0,0 +1,89 @@
+#pragma once
+
+#include "global.h"
+#include "types.h"
+
+#define BMG_MAGIC "MESGbmg1"
+#define BMG_TAG(a, b, c, d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
+
+typedef enum BMGTag {
+    /* "INF1" */ BMG_TAG_INF1 = BMG_TAG('I', 'N', 'F', '1'),
+    /* "FLW1" */ BMG_TAG_FLW1 = BMG_TAG('F', 'L', 'W', '1'),
+    /* "FLI1" */ BMG_TAG_FLI1 = BMG_TAG('F', 'L', 'I', '1'),
+    /* "DAT1" */ BMG_TAG_DAT1 = BMG_TAG('D', 'A', 'T', '1'),
+} BMGTag;
+
+typedef enum BMGEncoding {
+    /* 1 */ BMG_ENCODING_CP1252 = 1,
+    /* 2 */ BMG_ENCODING_UTF16_BE,
+    /* 3 */ BMG_ENCODING_SHIFT_JIS,
+    /* 4 */ BMG_ENCODING_UTF8,
+    /* 5 */ BMG_ENCODING_MAX
+} BMGEncoding;
+
+typedef struct BMGSectionBase {
+    /* 0x00 */ char tag[4]; // "INF1", "DAT1", ...
+    /* 0x04 */ u32 size; // the size of the section
+} BMGSectionBase; // size = 0x8
+
+typedef struct BMGHeader {
+    /* 0x00 */ char magic[8]; // always "MESGbmg1"
+    /* 0x08 */ u32 fileSize; // the size of the BMG file
+    /* 0x0C */ u32 numSections; // the number of sections (INF1, DAT1, ...)
+    /* 0x10 */ u8 encoding; // see `BMGEncoding`
+    /* 0x11 */ u8 unk_11[0xF]; // alignment padding?
+    /* 0x20 */ BMGSectionBase* firstSection; // technically not part of the header but used by functions
+} BMGHeader; // size = 0x24
+
+typedef struct EntryINF1 {
+    /* 0x00 */ u32 offset; // relative to the end of the DAT1 header
+    /* 0x04 */ u32 unk_04; // flags?
+} EntryINF1; // size = 0x8
+
+typedef struct SectionINF1 {
+    /* 0x00 */ BMGSectionBase base;
+    /* 0x08 */ u16 numEntries;
+    /* 0x0A */ u16 entrySize;
+    /* 0x0C */ u16 groupId;
+    /* 0x0E */ u8 colorId;
+    /* 0x0F */ u8 unk_0F[0x1]; // alignment padding?
+    /* 0x10 */ EntryINF1* entries;
+} SectionINF1;
+
+typedef struct EntryFLW1 {
+    /* 0x00 */ u8* data; //! TODO: find what's the format
+} EntryFLW1;
+
+typedef struct SectionFLW1 {
+    /* 0x00 */ BMGSectionBase base;
+    /* 0x08 */ EntryFLW1* entries;
+} SectionFLW1;
+
+typedef struct EntryFLI1 {
+    /* 0x00 */ u8* data; //! TODO: find what's the format
+} EntryFLI1;
+
+typedef struct SectionFLI1 {
+    /* 0x00 */ BMGSectionBase base;
+    /* 0x08 */ EntryFLI1* entries;
+} SectionFLI1;
+
+typedef struct EntryDAT1 {
+    /* 0x00 */ char* text;
+} EntryDAT1;
+
+typedef struct SectionDAT1 {
+    /* 0x00 */ BMGSectionBase base;
+    /* 0x08 */ EntryDAT1* entries;
+} SectionDAT1;
+
+typedef struct BMGFileInfo {
+    /* 0x00 */ BMGHeader* pHeader; // pointer to the file's header
+    /* 0x04 */ SectionINF1* pINF1; // pointer to the data informations (INF -> informations)
+    /* 0x08 */ SectionFLW1* pFLW1; // pointer to an unknown dataset (FLW -> ?)
+    /* 0x0C */ SectionFLI1* pFLI1; // pointer to an unknown dataset (FLI -> ?)
+    /* 0x10 */ SectionDAT1* pDAT1; // pointer to the data (DAT -> data)
+    /* 0x14 */ BMGHeader* unk_14; // same as unk_00 (?)
+    /* 0x18 */ s16 unk_18; // stores `func_020372f0`->param_3 value (currently undetermined purpose)
+    /* 0x1A */ s16 unk_1A; // stores result of `func_020371c8` (currently undetermined purpose)
+} BMGFileInfo; // size = 0x1C
diff --git a/include/Message/MessageManager.hpp b/include/Message/MessageManager.hpp
index 6d61c627..71106045 100644
--- a/include/Message/MessageManager.hpp
+++ b/include/Message/MessageManager.hpp
@@ -2,21 +2,19 @@
 
 #include "global.h"
 #include "types.h"
+#include "Message/BMG.hpp"
 
-typedef struct UnknownData {
-    unk32 unk_00;
-    unk32 unk_04;
-    unk32 unk_08;
-    unk32 unk_0C;
-    unk32 unk_10;
-    unk32 unk_14;
-    unk16 unk_18;
-    unk16 unk_1A;
-} UnknownData;
+/**
+ * - pHeader
+ * 021ACFD0
+ * 021FD7B0
+ * 02204380
+ * 023D98B0
+ */
 
 class MessageManager {
 private:
-    UnknownData* aUnknownData;
+    BMGFileInfo* aUnknownData;
 
 public:
     void func_020372f0(int index, int param_3, int param_4);
diff --git a/src/Main/MessageManager.cpp b/src/Main/MessageManager.cpp
index 5ce577b1..f66da52d 100644
--- a/src/Main/MessageManager.cpp
+++ b/src/Main/MessageManager.cpp
@@ -3,33 +3,108 @@ extern "C" {
 }
 #include "Message/MessageManager.hpp"
 
-char* func_0202ab38(int lang);
+char* func_0202ab38(u32* lang);
 u32* func_0202d550(int, u32*, char* path, int, int, int);
 
 extern u32 *data_027e0ce0[];
 extern u32 data_027e05f4; // language
 extern u32* data_ov002_0210016c;
 
-THUMB void func_020371b4(UnknownData* pData) {
-    pData->unk_00 = 0;
-    pData->unk_04 = 0;
-    pData->unk_08 = 0;
-    pData->unk_0C = 0;
-    pData->unk_10 = 0;
-    pData->unk_14 = 0;
+THUMB void func_020371b4(BMGFileInfo* pData) {
+    pData->pHeader = NULL;
+    pData->pINF1 = NULL;
+    pData->pFLW1 = NULL;
+    pData->pFLI1 = NULL;
+    pData->pDAT1 = NULL;
+    pData->unk_14 = NULL;
     pData->unk_18 = 0;
 }
 
-THUMB int func_020371c8(UnknownData* pData, u32* param_2, int param_3) {
-    /* TODO */
+THUMB int func_020371c8(BMGFileInfo* pData, u32* pFile, int param_3) {
+    char acVar1;
+    char* pacVar2;
+    char acVar3;
+    int dVar4;
+    u32 uVar5;
+
+    pData->unk_14 = (BMGHeader*)pFile;
+    pData->unk_18 = param_3;
+    pData->pHeader = (BMGHeader*)pFile;
+
+    acVar1 = BMG_TAG_FLI1;
+
+    // acVar1 = 'FLI1';
+    // pacVar2 = pHeader->firstSection;
+    // uVar5 = 0;
+    // dVar4 = 0xFFFF;
+
+    if (pData->pFLI1 != NULL) {
+    //     do {
+    //         acVar3 = *pacVar2;
+
+            if (acVar1 < acVar3) {
+    //             if ('DAT1' < acVar3) {
+    //                 if (acVar3 == 'FLW1') {
+    //                     pData->pFLW1 = (int)pacVar2;
+    //                 }
+    //             } else if ('DAT1' <= acVar3) {
+    //                 pData->pDAT1 = (int)(pacVar2 + 2);
+    //             }
+            } else if (acVar3 < acVar1) {
+    //             if (('MID1' < acVar3) && (acVar3 == 'INF1')) {
+    //                 pData->pINF1 = (int)pacVar2;
+    //                 dVar4 = pacVar2[3];
+    //             }
+            } else {
+    //             pData->pFLI1 = (int)pacVar2;
+            }
+
+    //         uVar5 = uVar5 + 1;
+    //         pacVar2++;
+    //     } while (uVar5 < pData->pFLI1);
+    }
+
+    return dVar4;
 }
 
-THUMB int func_02037258(UnknownData* pData, unk32 param_2) {
-    /* TODO */
+ARM int func_02037258(BMGFileInfo* pData, unk32 param_2) {
+    // u32 iVar1;
+
+    // iVar1 = pData->pINF1;
+
+    // if (iVar1 == 0) {
+    //     return 0;
+    // }
+
+    // if (param_2 < iVar1) {
+    //     return (iVar1 + 10) * param_2 + iVar1 + 0x10;
+    // }
+
+    // return 0;
 }
 
-THUMB unk16 func_0203728c(UnknownData* pData, unk32 param_2) {
-    /* TODO */
+ARM s64 func_0203728c(BMGFileInfo* pData, unk32 param_2) {
+    // u32* iVar1;
+    // u32 uVar2;
+    // u32 uVar3;
+
+    // iVar1 = pData->unk_0C;
+    // if (iVar1 == 0) {
+    //     return 0xFFFF;
+    // }
+
+    // uVar2 = 0;
+    // if (iVar1 + 0xC + 8 != 0) {
+    //     do {
+    //         if (param_2 == *(int *)(iVar1 + 0x10 + uVar2 * 8)) {
+    //             return iVar1 + 0x10 + uVar2 * 8 + 4;
+    //         }
+    //         uVar3 = uVar2 + 1;
+    //         uVar2 = uVar3 & 0xFFFF;
+    //     } while ((uVar3 & 0xFFFF) < iVar1 + 0xC + 8);
+    // }
+
+    // return 0xFFFF;
 }
 
 static char* sBMGFiles[] = {
@@ -71,32 +146,34 @@ static char* sBMGFiles[] = {
 
 THUMB void MessageManager::func_020372f0(int index, int param_3, int param_4) {
     char bmgPath[64];
-    UnknownData local_70;
-    u32* uVar2;
+    BMGFileInfo bmgFile;
+    u32* pFile;
     int iVar1;
 
     // path to the bmg file for the current language (i.e.: "English/Message/battle.bmg")
-    strcpy(bmgPath, func_0202ab38(data_027e05f4));
+    strcpy(bmgPath, func_0202ab38(&data_027e05f4));
     strcat(bmgPath, "/Message/");
     strcat(bmgPath, sBMGFiles[index]);
     strcat(bmgPath, ".bmg");
 
-    uVar2 = data_027e0ce0[1];
+    pFile = data_027e0ce0[1];
 
     if (param_3 != 1) {
         if (param_3 != 4) {
-            uVar2 = data_027e0ce0[0];
+            pFile = data_027e0ce0[0];
         } else {
-            uVar2 = data_ov002_0210016c;
+            pFile = data_ov002_0210016c;
         }
+    } else {
+            // pFile = data_027e0ce0[0];
     }
 
-    uVar2 = func_0202d550(0xC4, uVar2, bmgPath, 0, 0x10, 0);
+    pFile = func_0202d550(0xC4, pFile, bmgPath, 0, 0x10, 0);
 
-    local_70.unk_1A = 0;
-    func_020371b4(&local_70);
+    bmgFile.unk_1A = 0;
+    func_020371b4(&bmgFile);
 
-    iVar1 = func_020371c8(&local_70, uVar2, param_3);
-    this->aUnknownData[iVar1] = local_70;
+    iVar1 = func_020371c8(&bmgFile, pFile, param_3);
+    this->aUnknownData[iVar1] = bmgFile;
     this->aUnknownData[iVar1].unk_1A = iVar1;
 }