add gb_config_t, gb_disasm(), refactor logic, misc cleanups

1 files changed, 25 insertions, 2 deletions

diff --git a/gb.h b/gb.h
index 44f80b0..a824c4b 100644
--- a/gb.h
+++ b/gb.h
@@ -28,7 +28,23 @@ typedef enum {
 // frame size, in bytes
 #define GB_FRAME_SIZE (3 * 160 * 144)
 
+typedef struct gb_t_ gb_t;
+
 typedef struct {
+  void (*on_set_rom_bank)(const gb_t *, const uint16_t);
+  void (*on_set_ram_bank)(const gb_t *, const uint16_t);
+  void (*on_vblank)(const gb_t *);
+  void (*on_hblank)(const gb_t *);
+  void (*on_set_cpu_state)(const gb_t *, const gb_cpu_state_t);
+  void (*on_timer)(const gb_t *);
+  void (*on_gpu_step)(const gb_t *);
+  void (*on_gpu_set_mode)(const gb_t *, const uint8_t);
+  void *cb_data;
+} gb_config_t;
+
+struct gb_t_ {
+  const gb_config_t *config;
+
   struct {
     // _Bool in_bios;
 
@@ -116,12 +132,19 @@ typedef struct {
     // interrupt master enable
     _Bool ime;
   } cpu;
-} gb_t;
+};
+
+void gb_init(
+  gb_t * const ctx,
+  const gb_config_t * const config,
+  const uint8_t *rom,
+  const uint32_t rom_size
+);
 
-void gb_init(gb_t * const, const uint8_t *rom, const uint32_t rom_size);
 void gb_set_buttons(gb_t * const, const uint8_t);
 void gb_frame(gb_t * const);
 void gb_step(gb_t * const);
+_Bool gb_disasm(gb_t * const, char * const, size_t * const);
 const uint8_t *gb_get_rgb_frame(const gb_t * const);
 
 #ifdef __cplusplus