native bps creation

Randomizer.py

@@ -14,6 +14,9 @@ import math
 import Fusion_Graph as Graph
 from Fusion_Items import *
 from bps.apply import apply_to_files
+from bps.diff import diff_bytearrays
+from bps.io import write_bps
+from bps.util import bps_progress
 
 version = '0.11.6'
 
@@ -4913,8 +4916,18 @@ def patch_game():
                         patchedGame.write(value.to_bytes(1, 'little'))
                 
                 if Patch:
-                    # FIXME: replace with internal patch creator
-                    os.system('.\\flips\\flips.exe --create --bps "{}" ".\\seeds\\{}.gba"'.format(BaseGame, FileName))
+                    with open(BaseGame, 'rb') as source:
+                        sourcedata = source.read()
+                    with open(os.path.join('.', 'seeds', '{}.gba'.format(FileName)), 'rb') as target:
+                        targetdata = target.read()
+                    
+                    patch = open(os.path.join('.', 'seeds', '{}.bps'.format(FileName)), 'wb')
+                        
+                    blocksize = (len(sourcedata) + len(targetdata)) // 1000000 + 1
+                    print("Using blocks of {0} bytes".format(blocksize))
+
+                    iterable = diff_bytearrays(blocksize, sourcedata, targetdata)
+                    write_bps(bps_progress(iterable), patch)
     print('')
     ItemNames = [
         'Missile Data',