geckocode-libs

Python library for parsing and editing Gecko Codes for the Wii/GCN

Installation

pip install geckolibs

Usage

With geckocode-libs, file parsing is simple to do.

You can read a textual codelist into a GeckoCodeTable using the method GeckoCodeTable.from_text(our_text), which automatically detects the type of codelist being read and handles all the dirty work for you! This returns a new GeckoCodeTable object.

You can also read a raw codelist from a GCT using the method GeckoCodeTable.from_bytes(our_bytes), which parses the raw bytes given to the method into a new GeckoCodeTable object.

When you are done editing your GCT, you can convert the object back into a codelist, text, or raw data using the methods GeckoCodeTable.as_codelist(codelist_type), GeckoCodeTable.as_text(), and GeckoCodeTable.as_bytes() respectively.

You can also create your own codes using the library itself, an example shown here:

gct = GeckoCodeTable()                      # Empty GCT
code = GeckoCode("Our awesome code", "Me")  # Empty GeckoCode named "Our awesome code", created by "Me"
command = Write32(0x60000000, 0x80231480)   # Individual command

code.add_child(command)                     # Add a command to the code
gct.add_child(code)                         # Add a code to the GCT

Type checking of codes can be done in 3 ways:

code = Write8(69, 0x80203932)

code == Write8                              # True
code == Write8.codetype                     # True
code.codetype == Write8.codetype            # True
code.codetype == GeckoCommand.Type.WRITE_8  # True

It should be noted that in order to check multiple codetypes at once, code.codetype should be used.

Example

>>> from geckolibs.geckocode import *
>>> from geckolibs.gct import *
>>> 
>>> ifblock = IfEqual32(0x00D0C0DE, 0x80204158)
>>>
>>> code = WriteString(b"\x00\x01\x02\x03\x04\x05", 0x80023994)
>>> ifblock.add_child(code)
>>>
>>> code = AsmInsert(b"\x38\x03\x00\x01\x38\x00\x00\x18", 0x80291358)
>>> ifblock.add_child(code)
>>>
>>> geckocode = GeckoCode("Test Code", "JoshuaMK", "Testing our new code!", ifblock)
>>> geckocode.add_child(Terminator(0x80008000))
>>>
>>> print(geckocode)

Test Code [JoshuaMK]
  Testing our new code!

>>> print(geckocode.as_text())

20204158 00D0C0DE
06023994 00000006
00010203 04050000
C2291358 00000002
38030001 38000018
60000000 00000000
E0000000 80008000

>>> for command in geckocode:  
...     print(command)        
...

(20) If the word at address (0x00204158 + the base address) is equal to 0x00D0C0DE:
    (06) Write 6 bytes to 0x00023994 + the base address
    (C2) Inject (b / b) the designated ASM at 0x00291358 + the base address
(E0) Clear the code execution status. Set the base address to 80000000. Set the pointer address to 80000000.

Notes

Please give credit to this project when using it! :)