Remove custom cheat code management

CHANGES.md

@@ -1,8 +1,9 @@
-Next Release
+Release 1.6 (2019/02/05)
 ===========
 * Add MO5 emulation.
 * A more complex heuristic is used to start the game when the 'B' button of the gamepad is pressed, depending on the media type and of the emulated computer (cf. README file for more info).
 * Add core option to autorun the game.
+* Remove custom cheat code management (useless since RetroArch 1.7.4 and its built-in cheat code feature).
 
 Release 1.5 (2018/12/29)
 ===========

src/libretro.c

@@ -49,9 +49,6 @@ void linearFree(void* mem);
 #define AUDIO_SAMPLE_RATE 22050
 #define AUDIO_SAMPLE_PER_FRAME AUDIO_SAMPLE_RATE / VIDEO_FPS
 #define CPU_FREQUENCY     1000000
-#define MAX_CHEATS        10
-#define CHEAT_LENGTH      9
-#define CHEAT_SEP_POS     6
 // Pitch = length in bytes between two lines in video buffer
 #define PITCH             sizeof(uint32_t) * XBITMAP
 // Autorun: Number of frames to wait before simulating
@@ -99,13 +96,6 @@ static const struct retro_variable prefs[] = {
     { NULL, NULL }
 };
 
-typedef struct
-{
-  int address;
-  char value;
-} Cheat;
-static Cheat cheats[MAX_CHEATS] = { {0, 0} };
-
 typedef enum { NO_MEDIA, MEDIA_FLOPPY, MEDIA_TAPE, MEDIA_CARTRIDGE } Media;
 static Media currentMedia = NO_MEDIA;
 
@@ -246,52 +236,14 @@ void retro_set_controller_port_device(unsigned port, unsigned device)
 
 void retro_cheat_reset(void)
 {
-  if (log_cb) log_cb(RETRO_LOG_INFO, "Reset cheats.\n");
-  memset(cheats, 0, sizeof(cheats));
-}
-
-static bool parse_cheat(const char *code, Cheat *cheat)
-{
-  if ((strlen(code) != CHEAT_LENGTH) || (code[CHEAT_SEP_POS] != '-'))
-  {
-    return false;
-  }
-  cheat->address = strtol(code, NULL, 16);
-  cheat->value = (char) strtol(code + CHEAT_SEP_POS + 1, NULL, 16);
-  if (cheat->address <= 0 || cheat->address >= RAM_SIZE)
-  {
-    return false;
-  }
-  return true;
 }
 
 void retro_cheat_set(unsigned index, bool enabled, const char *code)
 {
-  Cheat cheat;
-  if (log_cb) log_cb(RETRO_LOG_INFO, "Setting cheat %s at index %d, enabled=%s.\n",
-                    code, index, enabled ? "yes" : "no");
-  if ((index < MAX_CHEATS) && enabled)
-  {
-    if (!parse_cheat(code, &cheat))
-    {
-      if (log_cb) log_cb(RETRO_LOG_ERROR, "Wrong cheat format");
-      return;
-    }
-    cheats[index] = cheat;
-  }
-}
-
-static void apply_cheats()
-{
-  int i;
-  for (i = 0; i < MAX_CHEATS; i++)
-  {
-    if (cheats[i].address == 0)
-    {
-      return;
-    }
-    ram[cheats[i].address] = cheats[i].value;
-  }
+  // Unused parameters
+  (void) index;
+  (void) enabled;
+  (void) code;
 }
 
 void retro_reset(void)
@@ -561,7 +513,6 @@ void retro_run(void)
   }
 
   update_input();
-  apply_cheats();
 
   if (autorun_counter > 0)
   {