新仙劍 0exp Gmon.dat Generator

#Python Script to make 0exp GMon.dat
#Author: Append Huang ([email protected])
#Reference: https://www.ptt.cc/bbs/pal/M.1461154467.A.F26.html
#Reference: https://goo.gl/VypRfq

#read binary file as bytearray to make modification
with open("GMon.dat","rb") as f:
    gmon = bytearray(f.read())

#begin from 0x200, read every 4 bytes:
for i in range(0x200,len(gmon)-4):
    if gmon[i:i+4] == b'\x00\xF0\xF2\x7F':
        #Name: 00F0F27F_name_2525
        j=i+4
        while gmon[j:j+2] != b'\x25\x25':
            j+=1
        mon_name = gmon[i+4:j].decode(encoding='big5') #name is in big5
    elif gmon[i:i+4] == b'\x01\x10\x20\x7F':
        #Stats: 01 10 20 7F "Type"(1byte) 00 00 00 "EXP"(4byte)
        tup_48 = tuple() #type of stats
        if gmon[i+4:i+8] == b'\xBE\x00\x00\x00': #BE: Exp
            #Whole Data (12byte):
            #print(" ".join(["%02X"]*12)%tuple(gmon[i:i+12]))
            mon_exp = int.from_bytes(gmon[i+8:i+12],'little')
            print("%d %s"%(mon_exp, mon_name))
            # Hacking (0exp)
            gmon[i+8:i+12] = (0).to_bytes(4,"little")
            mon_exp = int.from_bytes(gmon[i+8:i+12],'little')
            print("=> %d %s"%(mon_exp, mon_name))

#Store it back
with open("GMon_0exp.dat","wb") as f:
    f.write(bytes(gmon))