Added Code

GUI.py

@@ -0,0 +1,119 @@
+from tkinter import *
+from tkinter import filedialog as fd
+import Randomiser
+import Patcher
+root = Tk()
+root.title("MTTNE Randomiser")
+root.geometry("720x360")
+root.config(background="#1e1e1e")
+
+class Error(Exception):
+    pass
+
+class itemError(Error):
+    pass
+
+class fileError(Error):
+    pass
+
+def selectFile(arg):
+    filetypes = (('Data files', '*.dat'), ('All files', '*.*'))
+
+    if arg == "in":
+        filename = fd.askopenfilename(title='Select a Decoded map file', filetypes=filetypes)
+        e.delete(0, END)
+        e.insert(0, filename)
+    elif arg == "out":
+        filename = fd.asksaveasfilename(title='Choose Output Directory', defaultextension=".dat", filetypes=filetypes)
+        o.delete(0, END)
+        o.insert(0, filename)
+
+def generateGame():
+    try:
+        infile = e.get()
+        outfile = o.get()
+        if infile == "" or outfile == "":
+            raise fileError
+        if seedEntry.get() != "":
+            seed = int(seedEntry.get())
+        else:
+            seed = ""
+        missiles = int(MissEntry.get())
+        supers = int(SupEntry.get())
+        powerBombs = int(PBEntry.get())
+        magShields = int(ShieldEntry.get())
+        eTanks = int(ETankEntry.get())
+        if missiles + supers + powerBombs + magShields + eTanks > 110:
+            raise itemError
+        itemDict = Randomiser.randomiser(seed, missiles, powerBombs, supers, magShields, eTanks)
+        Patcher.patch(infile, outfile, itemDict)
+    except ValueError:
+        pass
+    except itemError:
+        pass
+    except fileError:
+        pass
+
+def updateItems():
+    try:
+        missiles = int(MissEntry.get())
+        supers = int(SupEntry.get())
+        powerBombs = int(PBEntry.get())
+        magShields = int(ShieldEntry.get())
+        eTanks = int(ETankEntry.get())
+        count = missiles + supers + powerBombs + magShields + eTanks
+    except ValueError:
+        count = "N/A"
+    Itemcount.config(text=str(count) + "/110")
+    root.after(100, updateItems)
+
+
+seedEntry = Entry(root)
+seedLabel = Label(root, text="Input Seed (Optional): ", fg="white",bg="#1e1e1e")
+e = Entry(root)
+o = Entry(root)
+inbutton = Button(root, text="Choose Decoded Map File", width="20",command=lambda: selectFile("in"))
+outButton = Button(root, text="Choose Output File", width="20",command=lambda: selectFile("out"))
+patchButton = Button(root, text="Patch", width="20",command=generateGame) 
+
+MissLabel = Label(root, text="Missiles:", fg="white", bg="#1e1e1e")
+SupLabel = Label(root, text="Super Missiles:", fg="white", bg="#1e1e1e")
+PBLabel = Label(root, text="Power Bombs:",fg="white",bg="#1e1e1e")
+ShieldLabel = Label(root, text="Shields:",fg="white",bg="#1e1e1e")
+ETankLabel = Label(root, text="E-Tanks:",fg="white",bg="#1e1e1e")
+Itemcount = Label(root, text="0/110", fg="white", bg="#1e1e1e")
+
+MissEntry = Entry(root)
+MissEntry.insert(0, "46")
+SupEntry = Entry(root)
+SupEntry.insert(0, "20")
+PBEntry = Entry(root)
+PBEntry.insert(0, "16")
+ShieldEntry = Entry(root)
+ShieldEntry.insert(0, "14")
+ETankEntry = Entry(root)
+ETankEntry.insert(0, "14")
+
+
+seedEntry.grid(column=1, row=2, pady="5")
+seedLabel.grid(column=0, row=2, padx="5")
+e.grid(column=1, row=0, padx="10")
+o.grid(column=1,row=1, pady="5")
+inbutton.grid(column=0, row=0)
+outButton.grid(column=0,row=1)
+patchButton.grid(column=0,row=3)
+MissLabel.grid(column=2, row=0, padx="10")
+SupLabel.grid(column=2, row=1, padx="10")
+PBLabel.grid(column=2, row=2, padx="10")
+ShieldLabel.grid(column=2, row=3, padx="10")
+ETankLabel.grid(column=2, row=4, padx="10")
+Itemcount.grid(column=2, row=5, padx="10")
+MissEntry.grid(column=3, row=0, pady="5")
+SupEntry.grid(column=3, row=1, pady="5")
+PBEntry.grid(column=3, row=2, pady="5")
+ShieldEntry.grid(column=3, row=3, pady="5")
+ETankEntry.grid(column=3, row=4, pady="5")
+
+
+updateItems()
+root.mainloop()

Patcher.py

@@ -0,0 +1,69 @@
+import shutil
+import os
+
+half_n = 2**31
+n = half_n * 2
+def normalise(value):
+    return (value + half_n) % n - half_n
+
+def patch(infile, outfile, itemDict):
+    workingDir = os.getcwd()
+    tempfile = shutil.copy(infile, workingDir + "/temp.dat")
+    dictList = list(itemDict)
+    with open(tempfile, "rb+") as f:
+        for i in dictList:
+            f.seek(i)
+            value = int.to_bytes(itemDict[i], 1, 'little')
+            f.write(value)
+
+
+#Encoding code, basically assembler
+    counter = 0
+    mult = 84
+    exp = 225
+
+    with open(tempfile, "rb") as f:
+
+        size = os.path.getsize(tempfile)
+        if os.path.exists(outfile):
+            os.remove(outfile)
+        output = open(outfile, "ab")
+        while counter < size:
+            char = f.read(1)
+            char = int.from_bytes(char, 'little')
+            counter += 1
+            ecx = mult
+            eax = 0x66666667
+            edx = eax * ecx >> 32
+            edx = edx // 2
+            eax = ecx
+            eax = eax // 2**31
+            ebx = edx
+            ebx -= eax
+            ecx = exp
+            eax = 0x4bda12f7
+            edx = eax * ecx >> 32
+            edx = edx // 2**3
+            eax = ecx
+            eax = eax // 2**31
+            edx -= eax
+            eax = edx
+            dl = ebx % 256
+            dl -= eax % 256
+            signextended = char
+            if char >= 0x80:
+                signextended = 0xffffff << 8
+                signextended += char
+                signextended = int.to_bytes(signextended, 4, 'little')
+                signextended = int.from_bytes(signextended, 'little', signed=True)
+            eax = char - dl
+            storage = eax % 256
+            mult += signextended
+            eax = (signextended + 7) * counter
+            exp += eax
+            exp = normalise(exp)
+            output.write(int.to_bytes(storage, 1, 'little'))
+        output.close()
+    os.remove(tempfile)
+
+