Implement cheat code stuff

3 files changed, 39 insertions, 5 deletions

diff --git a/Makefile b/Makefile
index cdec8ba..bbd03ba 100644
--- a/Makefile
+++ b/Makefile
@@ -125,7 +125,7 @@ endif
 
 DEFS   += -DSPC700_C -DEXECUTE_SUPERFX_PER_LINE -DSDD1_DECOMP \
           -DVAR_CYCLES -DCPU_SHUTDOWN -DSPC700_SHUTDOWN \
-          -DNO_INLINE_SET_GET -DNOASM -DHAVE_MKSTEMP '-DACCEPT_SIZE_T=size_t'
+          -DNO_INLINE_SET_GET -DNOASM -DHAVE_MKSTEMP '-DACCEPT_SIZE_T=size_t' -DWANT_CHEATS
 
 DEFS  += -D__LIBRETRO__
 
diff --git a/libretro.c b/libretro.c
index bf33bd0..1f1a3aa 100644
--- a/libretro.c
+++ b/libretro.c
@@ -734,11 +734,45 @@ bool retro_unserialize(const void* data, size_t size)
 
 void retro_cheat_reset(void)
 {
-
+#ifdef WANT_CHEATS
+   S9xDeleteCheats();
+   S9xApplyCheats();
+#endif
 }
+
+#ifdef WANT_CHEATS
+extern SCheatData Cheat;
+#endif
+
 void retro_cheat_set(unsigned index, bool enabled, const char* code)
 {
-
+#ifdef WANT_CHEATS
+   uint32_t address;
+   uint8_t val;
+   
+   bool sram;
+   uint8_t bytes[3];//used only by GoldFinger, ignored for now 
+   
+   if (S9xGameGenieToRaw(code, &address, &val)!=NULL &&
+       S9xProActionReplayToRaw(code, &address, &val)!=NULL &&
+       S9xGoldFingerToRaw(code, &address, &sram, &val, bytes)!=NULL)
+   { // bad code, ignore
+      return;
+   }
+   if (index > Cheat.num_cheats)
+      return; // cheat added in weird order, ignore
+   if (index == Cheat.num_cheats)
+      Cheat.num_cheats++;
+   
+   Cheat.c[index].address = address;
+   Cheat.c[index].byte = val;
+   Cheat.c[index].enabled = enabled;
+   
+   Cheat.c[index].saved = false; // it'll be saved next time cheats run anyways
+   
+   Settings.ApplyCheats=true;
+   S9xApplyCheats();
+#endif
 }
 
 static void init_descriptors(void)
diff --git a/source/cheats.h b/source/cheats.h
index 7d43f2b..2201c3c 100644
--- a/source/cheats.h
+++ b/source/cheats.h
@@ -137,7 +137,7 @@ const char *S9xGameGenieToRaw (const char *code, uint32_t *address, uint8_t *byt
 const char *S9xProActionReplayToRaw (const char *code, uint32_t *address, uint8_t *byte);
 const char *S9xGoldFingerToRaw (const char *code, uint32_t *address, bool *sram,
 				uint8_t *num_bytes, uint8_t bytes[3]);
-void S9xApplyCheats ();
+void S9xApplyCheats(void);
 void S9xApplyCheat (uint32_t which1);
 void S9xRemoveCheats ();
 void S9xRemoveCheat (uint32_t which1);
@@ -146,7 +146,7 @@ void S9xDisableCheat (uint32_t which1);
 void S9xDisableAllCheat(void);
 void S9xAddCheat (bool enable, bool save_current_value, uint32_t address,
 		  uint8_t byte);
-void S9xDeleteCheats ();
+void S9xDeleteCheats(void);
 void S9xDeleteCheat (uint32_t which1);
 bool S9xLoadCheatFile (const char *filename);
 bool S9xSaveCheatFile (const char *filename);