1 files changed, 101 insertions, 0 deletions
diff --git a/src/coins.c b/src/coins.c
new file mode 100644
index 000000000..08646e2f9
--- /dev/null
+++ b/src/coins.c
@@ -0,0 +1,101 @@
+#include "global.h"
+#include "string_util.h"
+#include "text.h"
+#include "menu.h"
+#include "text_window.h"
+
+extern const u8 gText_Coins[];
+extern const u8 gUnknown_8417C2D[];
+
+EWRAM_DATA static u8 sCoinsWindowId = 0;
+
+#define MAX_COINS 9999
+
+u16 GetCoins(void)
+{
+    return gSaveBlock1Ptr->coins ^ gSaveBlock2Ptr->encryptionKey;
+}
+
+void SetCoins(u16 coinAmount)
+{
+    gSaveBlock1Ptr->coins = coinAmount ^ gSaveBlock2Ptr->encryptionKey;
+}
+
+bool8 GiveCoins(u16 toAdd)
+{
+    u16 coins = GetCoins();
+    if (coins >= MAX_COINS)
+        return FALSE;
+    // check overflow, can't have less coins than previously
+    if (coins <= coins + toAdd)
+    {
+        coins += toAdd;
+        if (coins > MAX_COINS)
+            coins = MAX_COINS;
+    }
+    else
+    {
+        coins = MAX_COINS;
+    }
+    SetCoins(coins);
+    return TRUE;
+}
+
+bool8 TakeCoins(u16 toSub)
+{
+    u16 coins = GetCoins();
+    if (coins >= toSub)
+    {
+        SetCoins(coins - toSub);
+        return TRUE;
+    }
+    return FALSE;
+}
+
+void PrintCoinsString_Parameterized(u8 windowId, u32 coinAmount, u8 x, u8 y, u8 speed)
+{
+    ConvertIntToDecimalStringN(gStringVar1, coinAmount, STR_CONV_MODE_RIGHT_ALIGN, 4);
+    StringExpandPlaceholders(gStringVar4, gText_Coins);
+    AddTextPrinterParameterized(windowId, 0, gStringVar4, x, y, speed, NULL);
+}
+
+void sub_80D0674(u8 windowId, u16 tileStart, u8 palette, u32 coinAmount)
+{
+    SetWindowBorderStyle(windowId, FALSE, tileStart, palette);
+    AddTextPrinterParameterized(windowId, 2, gUnknown_8417C2D, 0, 0, 0xFF, 0);
+    PrintCoinsString_Parameterized(windowId, coinAmount, 0x10, 0xC, 0);
+}
+
+void PrintCoinsString(u32 coinAmount)
+{
+    u8 windowId;
+    int width;
+
+    ConvertIntToDecimalStringN(gStringVar1, coinAmount, STR_CONV_MODE_RIGHT_ALIGN, 4);
+    StringExpandPlaceholders(gStringVar4, gText_Coins);
+    width = GetStringWidth(0, gStringVar4, 0);
+    windowId = sCoinsWindowId;
+    AddTextPrinterParameterized(windowId, 0, gStringVar4, 64 - width, 0xC, 0, NULL);
+}
+
+void ShowCoinsWindow(u32 coinAmount, u8 x, u8 y)
+{
+    struct WindowTemplate template, template2;
+
+    SetWindowTemplateFields(&template, 0, x + 1, y + 1, 8, 3, 0xF, 0x20);
+    template2 = template; // again, why...
+    sCoinsWindowId = AddWindow(&template2);
+    FillWindowPixelBuffer(sCoinsWindowId, 0);
+    PutWindowTilemap(sCoinsWindowId);
+    sub_814FF2C(sCoinsWindowId, 0x21D, 0xD0);
+    SetWindowBorderStyle(sCoinsWindowId, FALSE, 0x21D, 0xD);
+    AddTextPrinterParameterized(sCoinsWindowId, 2, gUnknown_8417C2D, 0, 0, 0xFF, 0);
+    PrintCoinsString(coinAmount);
+}
+
+void HideCoinsWindow(void)
+{
+    ClearWindowTilemap(sCoinsWindowId);
+    sub_810F4D8(sCoinsWindowId, TRUE);
+    RemoveWindow(sCoinsWindowId);
+}