Add enum for load flags

Author: vxgmichel

gambaterm/console.py

@@ -158,7 +158,10 @@ def __init__(
             self.gb.set_save_directory(tempfile.mkdtemp())
 
         # Load the rom
-        return_code = self.gb.load(self.romfile, 0 if self.force_gameboy else 1)
+        flags = self.gb.LoadFlag.NO_BIOS
+        if not self.force_gameboy:
+            flags |= self.gb.LoadFlag.CGB_MODE
+        return_code = self.gb.load(self.romfile, flags)
         if return_code != 0:
             # Make sure it exists
             open(self.romfile).close()

gambaterm/libgambatte.pyi

@@ -1,7 +1,15 @@
+from enum import IntFlag
 import numpy as np
 import numpy.typing as npt
 
 class GB:
+    class LoadFlag(IntFlag):
+        CGB_MODE = ...
+        GBA_FLAG = ...
+        RESERVED_FLAG = ...
+        SGB_MODE = ...
+        READONLY_SAV = ...
+        NO_BIOS = ...
     def load(self, rom_file: str, flags: int = 0) -> int: ...
     def run_for(
         self,

libgambatte_ext/libgambatte.pyx

@@ -2,10 +2,19 @@
 # distutils: libraries = gambatte
 # cython: language_level=3
 
+from enum import IntFlag
 from libcpp.string cimport string
 from libc.stdint cimport uint32_t, int16_t
 from _libgambatte cimport GB as C_GB
 
+class LoadFlag(IntFlag):
+    CGB_MODE = 1 # Treat the ROM as having CGB support regardless of what its header advertises.
+    GBA_FLAG = 2  # Use GBA intial CPU register values when in CGB mode.
+    RESERVED_FLAG = 4  # Previously a multicart heuristics enable. Reserved for future use.
+    SGB_MODE = 8  # Treat the ROM as having SGB support regardless of what its header advertises.
+    READONLY_SAV = 16 # Prevent implicit saveSavedata calls for the ROM.
+    NO_BIOS = 32  # Use heuristics to boot without a BIOS.
+
 
 cdef unsigned c_getinput(void *context) noexcept nogil:
     cdef unsigned int* value_ptr = <unsigned int*>context
@@ -15,12 +24,13 @@ cdef class GB:
     cdef C_GB c_gb
     cdef unsigned int c_input
 
+    LoadFlag = LoadFlag
+
     def __cinit__(self):
         self.c_gb.setInputGetter(&c_getinput, &self.c_input)
 
-    def load(self, str rom_file, unsigned flags=0):
-        no_bios_flags = 32
-        return self.c_gb.load(rom_file.encode(), flags | no_bios_flags)
+    def load(self, str rom_file, unsigned int flags=0):
+        return self.c_gb.load(rom_file.encode(), flags)
 
     def run_for(
         self,