1 files changed, 153 insertions, 0 deletions
diff --git a/src/link.c b/src/link.c
new file mode 100644
index 000000000..f63b2fcd7
--- /dev/null
+++ b/src/link.c
@@ -0,0 +1,153 @@
+#include "global.h"
+#include "palette.h"
+#include "gpu_regs.h"
+#include "link.h"
+#include "quest_log.h"
+#include "link_rfu.h"
+#include "librfu.h"
+#include "random.h"
+#include "task.h"
+#include "event_data.h"
+#include "string_util.h"
+
+struct BlockTransfer
+{
+    u16 pos;
+    u16 size;
+    const u8 *src;
+    bool8 active;
+    u8 multiplayerId;
+};
+
+struct LinkTestBGInfo
+{
+    u32 screenBaseBlock;
+    u32 paletteNum;
+    u32 dummy_8;
+    u32 dummy_C;
+};
+
+u32 gUnknown_3000E58;
+
+struct LinkTestBGInfo gLinkTestBGInfo;
+
+EWRAM_DATA struct LinkPlayer gLocalLinkPlayer = {};
+
+void sub_800B210(void);
+void InitLocalLinkPlayer(void);
+void sub_800978C(void);
+void ResetBlockSend(void);
+void task00_link_test(u8 taskId);
+void CB2_LinkTest(void);
+
+extern const u16 gLinkTestDigitsPal[0x20];
+extern const u16 gLinkTestDigitsGfx[0x1000];
+extern const u8 gBGControlRegOffsets[];
+
+bool8 IsWirelessAdapterConnected(void)
+{
+    if (gUnknown_203ADFA == 2 || gUnknown_203ADFA == 3)
+        return FALSE;
+
+    sub_800B1F4();
+    sub_80F86F4();
+    sub_80FB128(1);
+    if (sub_80FD3A4() == 0x8001)
+    {
+        rfu_REQ_stopMode();
+        rfu_waitREQComplete();
+        return TRUE;
+    }
+    sub_800B210();
+    CloseLink();
+    RestoreSerialTimer3IntrHandlers();
+    return FALSE;
+}
+
+void Task_DestroySelf(u8 taskId)
+{
+    DestroyTask(taskId);
+}
+
+void InitLinkTestBG(u8 paletteNum, u8 bgNum, u8 screenBaseBlock, u8 charBaseBlock, u16 a4)
+{
+    LoadPalette(gLinkTestDigitsPal, paletteNum * 16, 0x20);
+    DmaCopy16(3, gLinkTestDigitsGfx, (u16 *)BG_CHAR_ADDR(charBaseBlock) + (16 * a4), sizeof gLinkTestDigitsGfx);
+    gLinkTestBGInfo.screenBaseBlock = screenBaseBlock;
+    gLinkTestBGInfo.paletteNum = paletteNum;
+    gLinkTestBGInfo.dummy_8 = a4;
+    switch (bgNum)
+    {
+    case 1:
+        SetGpuReg(REG_OFFSET_BG1CNT, BGCNT_SCREENBASE(screenBaseBlock) | BGCNT_PRIORITY(1) | BGCNT_CHARBASE(charBaseBlock));
+        break;
+    case 2:
+        SetGpuReg(REG_OFFSET_BG2CNT, BGCNT_SCREENBASE(screenBaseBlock) | BGCNT_PRIORITY(1) | BGCNT_CHARBASE(charBaseBlock));
+        break;
+    case 3:
+        SetGpuReg(REG_OFFSET_BG3CNT, BGCNT_SCREENBASE(screenBaseBlock) | BGCNT_PRIORITY(1) | BGCNT_CHARBASE(charBaseBlock));
+        break;
+    }
+    SetGpuReg(REG_OFFSET_BG0HOFS + bgNum * 4, 0);
+    SetGpuReg(REG_OFFSET_BG0VOFS + bgNum * 4, 0);
+}
+
+void sub_80095BC(u8 paletteNum, u8 bgNum, u8 screenBaseBlock, u8 charBaseBlock)
+{
+    LoadPalette(gLinkTestDigitsPal, paletteNum * 16, 0x20);
+    DmaCopy16(3, gLinkTestDigitsGfx, (u16 *)BG_CHAR_ADDR(charBaseBlock), sizeof gLinkTestDigitsGfx);
+    gLinkTestBGInfo.screenBaseBlock = screenBaseBlock;
+    gLinkTestBGInfo.paletteNum = paletteNum;
+    gLinkTestBGInfo.dummy_8 = 0;
+    SetGpuReg(gBGControlRegOffsets[bgNum], BGCNT_SCREENBASE(screenBaseBlock) | BGCNT_CHARBASE(charBaseBlock));
+}
+
+void LinkTestScreen(void)
+{
+    int i;
+
+    ResetSpriteData();
+    FreeAllSpritePalettes();
+    ResetTasks();
+    SetVBlankCallback(sub_800978C);
+    ResetBlockSend();
+    gLinkType = 0x1111;
+    OpenLink();
+    SeedRng(gMain.vblankCounter2);
+    for (i = 0; i < MAX_LINK_PLAYERS; i++)
+    {
+        gSaveBlock2Ptr->playerTrainerId[i] = Random() % 256;
+    }
+    InitLinkTestBG(0, 2, 4, 0, 0);
+    SetGpuReg(REG_OFFSET_DISPCNT, DISPCNT_MODE_0 | DISPCNT_OBJ_1D_MAP | DISPCNT_BG0_ON | DISPCNT_BG2_ON | DISPCNT_OBJ_ON);
+    CreateTask(Task_DestroySelf, 0);
+    RunTasks();
+    AnimateSprites();
+    BuildOamBuffer();
+    UpdatePaletteFade();
+    gUnknown_3000E58 = 0;
+    InitLocalLinkPlayer();
+    CreateTask(task00_link_test, 0);
+    SetMainCallback2(CB2_LinkTest);
+}
+
+void SetLocalLinkPlayerId(u8 playerId)
+{
+    gLocalLinkPlayer.id = playerId;
+}
+
+void InitLocalLinkPlayer(void)
+{
+    gLocalLinkPlayer.trainerId = gSaveBlock2Ptr->playerTrainerId[0] | (gSaveBlock2Ptr->playerTrainerId[1] << 8) | (gSaveBlock2Ptr->playerTrainerId[2] << 16) | (gSaveBlock2Ptr->playerTrainerId[3] << 24);
+    StringCopy(gLocalLinkPlayer.name, gSaveBlock2Ptr->playerName);
+    gLocalLinkPlayer.gender = gSaveBlock2Ptr->playerGender;
+    gLocalLinkPlayer.linkType = gLinkType;
+    gLocalLinkPlayer.language = gGameLanguage;
+    gLocalLinkPlayer.version = gGameVersion + 0x4000;
+    gLocalLinkPlayer.lp_field_2 = 0x8000;
+    gLocalLinkPlayer.name[8] = IsNationalPokedexEnabled();
+    if (FlagGet(FLAG_0x844))
+    {
+        gLocalLinkPlayer.name[8] |= 0x10;
+    }
+}