/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
 *  Copyright (C) 2011-2017 - Daniel De Matteis
 *
 *  RetroArch is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with RetroArch.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdlib.h>
#include <stddef.h>
#include <string.h>

#include <file/config_file.h>
#include <file/file_path.h>
#include <compat/strl.h>
#include <compat/posix_string.h>
#include <streams/file_stream.h>
#include <string/stdstring.h>
#include <retro_miscellaneous.h>
#include <features/features_cpu.h>

#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif

#ifdef HAVE_MENU
#include "../menu/menu_driver.h"
#include "../menu/widgets/menu_input_dialog.h"
#include "../menu/widgets/menu_input_bind_dialog.h"
#endif

#ifdef HAVE_CHEEVOS
#include "../cheevos/cheevos.h"
#endif

#include "cheat_manager.h"

#include "../msg_hash.h"
#include "../retroarch.h"
#include "../dynamic.h"
#include "../core.h"
#include "../verbosity.h"
#include "../input/input_driver.h"
#include "../configuration.h"


unsigned cheat_manager_get_buf_size(void)
{
   return cheat_manager_state.buf_size;
}

unsigned cheat_manager_get_size(void)
{
   return cheat_manager_state.size;
}

void cheat_manager_apply_cheats(void)
{
#ifdef HAVE_CHEEVOS
   bool data_bool  = false;
#endif
   unsigned i, idx = 0;

   if (!cheat_manager_state.cheats)
      return;

   core_reset_cheat();

   for (i = 0; i < cheat_manager_state.size; i++)
   {
      if (cheat_manager_state.cheats[i].state && cheat_manager_state.cheats[i].handler == CHEAT_HANDLER_TYPE_EMU)
      {
         retro_ctx_cheat_info_t cheat_info;

         cheat_info.index   = idx++;
         cheat_info.enabled = true;
         cheat_info.code    = cheat_manager_state.cheats[i].code;

         if (!string_is_empty(cheat_info.code))
            core_set_cheat(&cheat_info);
      }
   }
    runloop_msg_queue_push(msg_hash_to_str(MSG_APPLYING_CHEAT), 1, 180, true);
    RARCH_LOG("%s\n", msg_hash_to_str(MSG_APPLYING_CHEAT));

#ifdef HAVE_CHEEVOS
   data_bool = idx != 0;
   cheevos_apply_cheats(&data_bool);
#endif
}

void cheat_manager_set_code(unsigned i, const char *str)
{
   if (!cheat_manager_state.cheats)
      return;

   if (!string_is_empty(str))
      strcpy(cheat_manager_state.cheats[i].code,str) ;

   cheat_manager_state.cheats[i].state    = true;
}

/**
 * cheat_manager_save:
 * @path                      : Path to cheats file (relative path).
 *
 * Saves cheats to file on disk.
 *
 * Returns: true (1) if successful, otherwise false (0).
 **/
bool cheat_manager_save(const char *path, const char *cheat_database, bool overwrite)
{
   bool ret;
   unsigned i;
   char buf[PATH_MAX_LENGTH];
   char cheats_file[PATH_MAX_LENGTH];
   config_file_t *conf               = NULL;
   unsigned int* data_ptrs[16] = { NULL};
   char* keys[16] = {
         "cheat%u_handler",
         "cheat%u_memory_search_size",
         "cheat%u_cheat_type",
         "cheat%u_value",
         "cheat%u_address",
         "cheat%u_address_bit_position",
         "cheat%u_rumble_type",
         "cheat%u_rumble_value",
         "cheat%u_rumble_port",
         "cheat%u_rumble_primary_strength",
         "cheat%u_rumble_primary_duration",
         "cheat%u_rumble_secondary_strength",
         "cheat%u_rumble_secondary_duration",
         "cheat%u_repeat_count",
         "cheat%u_repeat_add_to_value",
         "cheat%u_repeat_add_to_address",
   };

   buf[0] = cheats_file[0] = '\0';

   if ( (!cheat_manager_state.cheats) || cheat_manager_state.size==0 )
      return false ;

   if (!cheat_database)
      strlcpy(cheats_file, path, sizeof(cheats_file));
   else
   {
      fill_pathname_join(buf, cheat_database, path, sizeof(buf));

      fill_pathname_noext(cheats_file, buf, ".cht", sizeof(cheats_file));
   }
   if ( !overwrite )
      conf = config_file_new(cheats_file);
   else
      conf = config_file_new(NULL);

   if (!conf)
      conf = config_file_new(NULL);

   if (!conf)
      return false;

   config_set_int(conf, "cheats", cheat_manager_state.size);

   for (i = 0; i < cheat_manager_state.size; i++)
   {
      unsigned j;
      char endian_key[100];
      char key[256];
      char desc_key[256];
      char code_key[256];
      char enable_key[256];

      key[0] = endian_key[0] = desc_key[0] = code_key[0] = enable_key[0] = '\0';

      snprintf(endian_key, sizeof(endian_key), "cheat%u_big_endian",        i);
      snprintf(desc_key,   sizeof(desc_key),   "cheat%u_desc",   i);
      snprintf(code_key,   sizeof(code_key),   "cheat%u_code",   i);
      snprintf(enable_key, sizeof(enable_key), "cheat%u_enable", i);

      if (!string_is_empty(cheat_manager_state.cheats[i].desc))
         config_set_string(conf, desc_key,   cheat_manager_state.cheats[i].desc);
      else
         config_set_string(conf, desc_key,   cheat_manager_state.cheats[i].code);

      config_set_string(conf,    code_key,   cheat_manager_state.cheats[i].code);
      config_set_bool(conf,      enable_key, cheat_manager_state.cheats[i].state);
      config_set_bool(conf,      endian_key, cheat_manager_state.cheats[i].big_endian);

      data_ptrs[0] = &cheat_manager_state.cheats[i].handler;
      data_ptrs[1] = &cheat_manager_state.cheats[i].memory_search_size;
      data_ptrs[2] = &cheat_manager_state.cheats[i].cheat_type;
      data_ptrs[3] = &cheat_manager_state.cheats[i].value;
      data_ptrs[4] = &cheat_manager_state.cheats[i].address;
      data_ptrs[5] = &cheat_manager_state.cheats[i].address_mask;
      data_ptrs[6] = &cheat_manager_state.cheats[i].rumble_type;
      data_ptrs[7] = &cheat_manager_state.cheats[i].rumble_value;
      data_ptrs[8] = &cheat_manager_state.cheats[i].rumble_port;
      data_ptrs[9] = &cheat_manager_state.cheats[i].rumble_primary_strength;
      data_ptrs[10] = &cheat_manager_state.cheats[i].rumble_primary_duration;
      data_ptrs[11] = &cheat_manager_state.cheats[i].rumble_secondary_strength;
      data_ptrs[12] = &cheat_manager_state.cheats[i].rumble_secondary_duration;
      data_ptrs[13] = &cheat_manager_state.cheats[i].repeat_count;
      data_ptrs[14] = &cheat_manager_state.cheats[i].repeat_add_to_value;
      data_ptrs[15] = &cheat_manager_state.cheats[i].repeat_add_to_address;

      for (j = 0; j < 16; j++)
      {
         key[0] = '\0';
         snprintf(key, sizeof(key), keys[j], i);
         config_set_uint(conf, key, *(data_ptrs[j]));
      }

   }

   ret = config_file_write(conf, cheats_file);
   config_file_free(conf);

   return ret;
}

bool cheat_manager_copy_idx_to_working(unsigned idx)
{
   if ( (!cheat_manager_state.cheats) || (cheat_manager_state.size < idx+1))
   {
      return false;
   }

   memcpy(&(cheat_manager_state.working_cheat), &(cheat_manager_state.cheats[idx]), sizeof(struct item_cheat)) ;
   if ( cheat_manager_state.cheats[idx].desc != NULL )
      strlcpy(cheat_manager_state.working_desc, cheat_manager_state.cheats[idx].desc, CHEAT_DESC_SCRATCH_SIZE) ;
   else
      cheat_manager_state.working_desc[0] = '\0' ;

   if ( cheat_manager_state.cheats[idx].code != NULL )
      strlcpy(cheat_manager_state.working_code, cheat_manager_state.cheats[idx].code, CHEAT_CODE_SCRATCH_SIZE) ;
   else
      cheat_manager_state.working_code[0] = '\0' ;

   return true ;
}
bool cheat_manager_copy_working_to_idx(unsigned idx)
{
   if ( (!cheat_manager_state.cheats) || (cheat_manager_state.size < idx+1))
   {
      return false;
   }

   memcpy(&(cheat_manager_state.cheats[idx]), &(cheat_manager_state.working_cheat), sizeof(struct item_cheat)) ;
   if ( cheat_manager_state.cheats[idx].desc != NULL )
      free(cheat_manager_state.cheats[idx].desc) ;

   cheat_manager_state.cheats[idx].desc = strdup(cheat_manager_state.working_desc) ;

   if ( cheat_manager_state.cheats[idx].code != NULL )
      free(cheat_manager_state.cheats[idx].code) ;

   cheat_manager_state.cheats[idx].code = strdup(cheat_manager_state.working_code) ;
   return true ;
}
static void cheat_manager_new(unsigned size)
{
   unsigned i;


   cheat_manager_free() ;

   cheat_manager_state.buf_size = size;
   cheat_manager_state.size     = size;
   cheat_manager_state.search_bit_size     = 3;
   cheat_manager_state.cheats   = (struct item_cheat*)
      calloc(cheat_manager_state.buf_size, sizeof(struct item_cheat));

   if (!cheat_manager_state.cheats)
   {
      cheat_manager_state.buf_size = 0;
      cheat_manager_state.size = 0;
      cheat_manager_state.cheats = NULL;
      return ;
   }

   for (i = 0; i < cheat_manager_state.size; i++)
   {
      cheat_manager_state.cheats[i].desc = NULL ;
      cheat_manager_state.cheats[i].code = NULL ;
      cheat_manager_state.cheats[i].state  = false;
      cheat_manager_state.cheats[i].repeat_count = 1;
      cheat_manager_state.cheats[i].repeat_add_to_value = 0;
      cheat_manager_state.cheats[i].repeat_add_to_address = 1;
   }

   return ;
}

bool cheat_manager_load(const char *path, bool append)
{
   unsigned cheats = 0, i;
   config_file_t *conf    = config_file_new(path);
   unsigned orig_size ;
   unsigned int* data_ptrs[16] = { NULL};
   char* keys[16] = {
         "cheat%u_handler",
         "cheat%u_memory_search_size",
         "cheat%u_cheat_type",
         "cheat%u_value",
         "cheat%u_address",
         "cheat%u_address_bit_position",
         "cheat%u_rumble_type",
         "cheat%u_rumble_value",
         "cheat%u_rumble_port",
         "cheat%u_rumble_primary_strength",
         "cheat%u_rumble_primary_duration",
         "cheat%u_rumble_secondary_strength",
         "cheat%u_rumble_secondary_duration",
         "cheat%u_repeat_count",
         "cheat%u_repeat_add_to_value",
         "cheat%u_repeat_add_to_address",
   };

   if (!conf)
      return false;

   config_get_uint(conf, "cheats", &cheats);

   if (cheats == 0)
      goto error;

   cheat_manager_alloc_if_empty() ;

   if ( append )
   {
      orig_size = cheat_manager_get_size() ;
      if ( orig_size == 0)
      {
         cheat_manager_new(cheats);
      }
      else
      {
         cheats = cheats + orig_size ;
         if (cheat_manager_realloc(cheats, CHEAT_HANDLER_TYPE_EMU))
         {
         }
      }
   }
   else
   {
      orig_size = 0 ;
      cheat_manager_new(cheats);
   }

   for (i = orig_size; i < cheats; i++)
   {
      unsigned j;
      char desc_key[256];
      char code_key[256];
      char enable_key[256];
      char endian_key[256];
      char *tmp            = NULL;
      bool tmp_bool        = false;

      data_ptrs[0] = &cheat_manager_state.cheats[i].handler;
      data_ptrs[1] = &cheat_manager_state.cheats[i].memory_search_size;
      data_ptrs[2] = &cheat_manager_state.cheats[i].cheat_type;
      data_ptrs[3] = &cheat_manager_state.cheats[i].value;
      data_ptrs[4] = &cheat_manager_state.cheats[i].address;
      data_ptrs[5] = &cheat_manager_state.cheats[i].address_mask;
      data_ptrs[6] = &cheat_manager_state.cheats[i].rumble_type;
      data_ptrs[7] = &cheat_manager_state.cheats[i].rumble_value;
      data_ptrs[8] = &cheat_manager_state.cheats[i].rumble_port;
      data_ptrs[9] = &cheat_manager_state.cheats[i].rumble_primary_strength;
      data_ptrs[10] = &cheat_manager_state.cheats[i].rumble_primary_duration;
      data_ptrs[11] = &cheat_manager_state.cheats[i].rumble_secondary_strength;
      data_ptrs[12] = &cheat_manager_state.cheats[i].rumble_secondary_duration;
      data_ptrs[13] = &cheat_manager_state.cheats[i].repeat_count;
      data_ptrs[14] = &cheat_manager_state.cheats[i].repeat_add_to_value;
      data_ptrs[15] = &cheat_manager_state.cheats[i].repeat_add_to_address;

      endian_key[0] = desc_key[0] = code_key[0] = enable_key[0] = '\0';

      snprintf(desc_key,   sizeof(desc_key),   "cheat%u_desc",   i-orig_size);
      snprintf(code_key,   sizeof(code_key),   "cheat%u_code",   i-orig_size);
      snprintf(enable_key, sizeof(enable_key), "cheat%u_enable", i-orig_size);
      snprintf(endian_key, sizeof(endian_key), "cheat%u_endian", i-orig_size);

      cheat_manager_state.cheats[i].idx = i ;

      cheat_manager_state.cheats[i].desc = NULL ;
      cheat_manager_state.cheats[i].code = NULL ;
      cheat_manager_state.cheats[i].state = false ;
      cheat_manager_state.cheats[i].big_endian = false ;

      if (config_get_string(conf, desc_key, &tmp) && !string_is_empty(tmp))
         cheat_manager_state.cheats[i].desc = strdup(tmp) ;

      if (config_get_string(conf, code_key, &tmp) && !string_is_empty(tmp))
         cheat_manager_state.cheats[i].code = strdup(tmp) ;

      if (config_get_bool(conf, enable_key, &tmp_bool))
         cheat_manager_state.cheats[i].state  = tmp_bool;

      if (config_get_bool(conf, endian_key, &tmp_bool))
         cheat_manager_state.cheats[i].big_endian = tmp_bool;

      if (tmp)
         free(tmp);

      cheat_manager_state.cheats[i].cheat_type = CHEAT_TYPE_SET_TO_VALUE ;
      cheat_manager_state.cheats[i].memory_search_size = 3;
      for (j = 0 ; j < 16 ; j++ )
	  {
         char key[50] ;
         unsigned val = 0;
         snprintf(key,   sizeof(key),   keys[j],   i-orig_size);

         if ( config_get_uint(conf, key, &val))
            *(data_ptrs[j]) = val ;
      }
   }

   config_file_free(conf);

   return true;

error:
   config_file_free(conf);
   return false;
}


bool cheat_manager_realloc(unsigned new_size, unsigned default_handler)
{
   unsigned i;
   unsigned orig_size ;


   if (!cheat_manager_state.cheats)
   {
      cheat_manager_state.cheats = (struct item_cheat*)
         calloc(new_size, sizeof(struct item_cheat));
      orig_size = 0 ;
   }
   else
   {
      orig_size = cheat_manager_state.size ;

      /* if size is decreasing, free the items that will be lost */
      for (i = new_size; i < orig_size; i++)
      {
         if ( cheat_manager_state.cheats[i].code != NULL )
            free(cheat_manager_state.cheats[i].code) ;
         if ( cheat_manager_state.cheats[i].desc != NULL )
            free(cheat_manager_state.cheats[i].desc) ;
      }

      cheat_manager_state.cheats = (struct item_cheat*)
         realloc(cheat_manager_state.cheats, new_size * sizeof(struct item_cheat));
   }

   if (!cheat_manager_state.cheats)
   {
      cheat_manager_state.buf_size = cheat_manager_state.size = 0;
      cheat_manager_state.cheats = NULL;
      return false;
   }

   cheat_manager_state.buf_size = new_size;
   cheat_manager_state.size     = new_size;

   for (i = orig_size; i < cheat_manager_state.size; i++)
   {
      memset(&(cheat_manager_state.cheats[i]), 0, sizeof(cheat_manager_state.cheats[i])) ;
      cheat_manager_state.cheats[i].state   = false;
      cheat_manager_state.cheats[i].handler = default_handler;
      cheat_manager_state.cheats[i].cheat_type = CHEAT_TYPE_SET_TO_VALUE ;
      cheat_manager_state.cheats[i].memory_search_size = 3;
      cheat_manager_state.cheats[i].idx = i;
      cheat_manager_state.cheats[i].repeat_count = 1;
      cheat_manager_state.cheats[i].repeat_add_to_value = 0;
      cheat_manager_state.cheats[i].repeat_add_to_address = 1;
   }

   return true;
}

void cheat_manager_free(void)
{
   unsigned i = 0 ;

   if (cheat_manager_state.cheats)
   {
      for (i = 0; i < cheat_manager_state.size; i++)
      {
         if ( cheat_manager_state.cheats[i].desc != NULL )
            free(cheat_manager_state.cheats[i].desc) ;
         if ( cheat_manager_state.cheats[i].code != NULL )
            free(cheat_manager_state.cheats[i].code) ;
      }

      free(cheat_manager_state.cheats);
   }

   if ( cheat_manager_state.prev_memory_buf )
      free(cheat_manager_state.prev_memory_buf) ;

   if ( cheat_manager_state.matches )
      free(cheat_manager_state.matches) ;

   cheat_manager_state.cheats = NULL ;
   cheat_manager_state.size = 0 ;
   cheat_manager_state.buf_size = 0 ;
   cheat_manager_state.prev_memory_buf = NULL ;
   cheat_manager_state.curr_memory_buf = NULL ;
   cheat_manager_state.matches = NULL ;
   cheat_manager_state.total_memory_size = 0 ;
   cheat_manager_state.actual_memory_size = 0 ;
   cheat_manager_state.memory_initialized = false ;
   cheat_manager_state.memory_search_initialized = false ;

}

void cheat_manager_update(cheat_manager_t *handle, unsigned handle_idx)
{
   char msg[256];

   if (!handle || !handle->cheats || handle->size == 0)
      return;

   snprintf(msg, sizeof(msg), "Cheat: #%u [%s]: %s",
         handle_idx, handle->cheats[handle_idx].state ? "ON" : "OFF",
         (handle->cheats[handle_idx].desc!=NULL) ?
         (handle->cheats[handle_idx].desc) : (handle->cheats[handle_idx].code)
         );
   runloop_msg_queue_push(msg, 1, 180, true);
   RARCH_LOG("%s\n", msg);
}

void cheat_manager_toggle_index(unsigned i)
{
   settings_t *settings                     = config_get_ptr();
   if (!cheat_manager_state.cheats || cheat_manager_state.size == 0 )
      return;

   cheat_manager_state.cheats[i].state = !cheat_manager_state.cheats[i].state;
   cheat_manager_update(&cheat_manager_state, i);

   if (!settings)
      return ;

   if (settings->bools.apply_cheats_after_toggle)
      cheat_manager_apply_cheats();
}

void cheat_manager_toggle(void)
{

   if (!cheat_manager_state.cheats || cheat_manager_state.size == 0)
      return;

   cheat_manager_state.cheats[cheat_manager_state.ptr].state ^= true;
   cheat_manager_apply_cheats();
   cheat_manager_update(&cheat_manager_state, cheat_manager_state.ptr);
}

void cheat_manager_index_next(void)
{
   if (!cheat_manager_state.cheats || cheat_manager_state.size == 0)
      return;

   cheat_manager_state.ptr = (cheat_manager_state.ptr + 1) % cheat_manager_state.size;
   cheat_manager_update(&cheat_manager_state, cheat_manager_state.ptr);
}

void cheat_manager_index_prev(void)
{
   if (!cheat_manager_state.cheats || cheat_manager_state.size == 0)
      return;

   if (cheat_manager_state.ptr == 0)
      cheat_manager_state.ptr = cheat_manager_state.size - 1;
   else
      cheat_manager_state.ptr--;

   cheat_manager_update(&cheat_manager_state, cheat_manager_state.ptr);
}

const char *cheat_manager_get_code(unsigned i)
{
   if (!cheat_manager_state.cheats)
      return NULL;
   return cheat_manager_state.cheats[i].code;
}

const char *cheat_manager_get_desc(unsigned i)
{
   if (!cheat_manager_state.cheats)
      return NULL;
   return cheat_manager_state.cheats[i].desc;
}

bool cheat_manager_get_code_state(unsigned i)
{
   if (!cheat_manager_state.cheats)
      return false;
   return cheat_manager_state.cheats[i].state;
}

bool cheat_manager_get_game_specific_filename(char * cheat_filename, size_t max_length)
{
   settings_t *settings                   = config_get_ptr();
   global_t *global                       = global_get_ptr();
   const char *core_name                  = NULL;
   const char *game_name                  = NULL;
   struct retro_system_info system_info;

   if (!settings || !global || !cheat_filename)
      return false ;

   if ( !core_get_system_info(&system_info) )
      return false ;


   core_name                  = system_info.library_name;
   game_name                  = path_basename(global->name.cheatfile);

   if ( string_is_empty(settings->paths.path_cheat_database)  ||
         string_is_empty(core_name)  || string_is_empty(game_name) )
      return false ;

   cheat_filename[0] = '\0';
   strlcat(cheat_filename, settings->paths.path_cheat_database, max_length);
   fill_pathname_slash(cheat_filename, max_length);
   strlcat(cheat_filename, core_name,  max_length);
   fill_pathname_slash(cheat_filename, max_length);

   if (!filestream_exists(cheat_filename))
       path_mkdir(cheat_filename);

   strlcat(cheat_filename, game_name, max_length);

   return true ;

}
void cheat_manager_load_game_specific_cheats()
{
   char cheat_file[PATH_MAX_LENGTH] ;

   if (cheat_manager_get_game_specific_filename(cheat_file, PATH_MAX_LENGTH) )
      cheat_manager_load(cheat_file,true) ;

}
void cheat_manager_save_game_specific_cheats()
{
   char cheat_file[PATH_MAX_LENGTH] ;

   if (cheat_manager_get_game_specific_filename(cheat_file, PATH_MAX_LENGTH) )
      cheat_manager_save(cheat_file, NULL, true) ;

}

void cheat_manager_state_free(void)
{
   cheat_manager_free();
}

bool cheat_manager_alloc_if_empty(void)
{

   if (!cheat_manager_state.cheats)
   {
      cheat_manager_new(0);
   }

   return true;
}

int cheat_manager_initialize_memory(rarch_setting_t *setting, bool wraparound)
{
   retro_ctx_memory_info_t meminfo;
   bool refresh                  = false;
   bool is_search_initialization = (setting != NULL);

   meminfo.id = RETRO_MEMORY_SYSTEM_RAM;
   if (!core_get_memory(&meminfo))
   {
      runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_INIT_FAIL), 1, 180, true);
      return 0;
   }

   if ( meminfo.size == 0 )
   {
      return 0 ;
   }
   cheat_manager_state.actual_memory_size = (unsigned)meminfo.size;
   cheat_manager_state.curr_memory_buf    = meminfo.data;
   cheat_manager_state.total_memory_size  = (unsigned)meminfo.size;
   cheat_manager_state.num_matches        = (cheat_manager_state.total_memory_size*8)/((int)pow(2,cheat_manager_state.search_bit_size));
   /* Ensure we're aligned on 4-byte boundary */
#if 0
   if (meminfo.size % 4 > 0)
      cheat_manager_state.total_memory_size = cheat_manager_state.total_memory_size + (4 - (meminfo.size%4));
#endif
   if (is_search_initialization)
   {
      cheat_manager_state.prev_memory_buf = (uint8_t*) calloc(cheat_manager_state.total_memory_size, sizeof(uint8_t));
      if (!cheat_manager_state.prev_memory_buf)
      {
         runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_INIT_FAIL), 1, 180, true);
         return 0;
      }
      cheat_manager_state.matches = (uint8_t*) calloc(cheat_manager_state.total_memory_size, sizeof(uint8_t));
      if (!cheat_manager_state.matches)
      {
         free(cheat_manager_state.prev_memory_buf);
         cheat_manager_state.prev_memory_buf = NULL;
         runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_INIT_FAIL), 1, 180, true);
         return 0;
      }

      memset(cheat_manager_state.matches, 0xFF, cheat_manager_state.total_memory_size);
      memcpy(cheat_manager_state.prev_memory_buf, cheat_manager_state.curr_memory_buf, cheat_manager_state.actual_memory_size);
      cheat_manager_state.memory_search_initialized = true;
   }

   cheat_manager_state.memory_initialized = true;


   runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_INIT_SUCCESS), 1, 180, true);

#ifdef HAVE_MENU
   if (!wraparound)
   {
      menu_entries_ctl(MENU_ENTRIES_CTL_SET_REFRESH, &refresh);
      menu_driver_ctl(RARCH_MENU_CTL_SET_PREVENT_POPULATE, NULL);
   }
#endif

   return 0;
}

static void cheat_manager_setup_search_meta(unsigned int bitsize, unsigned int *bytes_per_item, unsigned int *mask, unsigned int *bits)
{
   switch( bitsize)
   {
      case 0 :
      {
         *bytes_per_item = 1 ;
         *bits = 1 ;
         *mask = 0x01 ;
         break ;
      }
      case 1 :
      {
         *bytes_per_item = 1 ;
         *bits = 2 ;
         *mask = 0x03 ;
         break ;
      }
      case 2 :
      {
         *bytes_per_item = 1 ;
         *bits = 4 ;
         *mask = 0x0F ;
         break ;
      }
      case 3 :
      {
         *bytes_per_item = 1 ;
         *bits = 8 ;
         *mask = 0xFF ;
         break ;
      }
      case 4 :
      {
         *bytes_per_item = 2 ;
         *bits = 8 ;
         *mask = 0xFFFF ;
         break ;
      }
      case 5 :
      {
         *bytes_per_item = 4 ;
         *bits = 8 ;
         *mask = 0xFFFFFFFF ;
         break ;
      }
   }
}

int cheat_manager_search_exact(rarch_setting_t *setting, bool wraparound)
{
   return cheat_manager_search(CHEAT_SEARCH_TYPE_EXACT) ;
}
int cheat_manager_search_lt(rarch_setting_t *setting, bool wraparound)
{
   return cheat_manager_search(CHEAT_SEARCH_TYPE_LT) ;
}
int cheat_manager_search_gt(rarch_setting_t *setting, bool wraparound)
{
   return cheat_manager_search(CHEAT_SEARCH_TYPE_GT) ;
}
int cheat_manager_search_lte(rarch_setting_t *setting, bool wraparound)
{
   return cheat_manager_search(CHEAT_SEARCH_TYPE_LTE) ;
}
int cheat_manager_search_gte(rarch_setting_t *setting, bool wraparound)
{
   return cheat_manager_search(CHEAT_SEARCH_TYPE_GTE) ;
}
int cheat_manager_search_eq(rarch_setting_t *setting, bool wraparound)
{
   return cheat_manager_search(CHEAT_SEARCH_TYPE_EQ) ;
}
int cheat_manager_search_neq(rarch_setting_t *setting, bool wraparound)
{
   return cheat_manager_search(CHEAT_SEARCH_TYPE_NEQ) ;
}
int cheat_manager_search_eqplus(rarch_setting_t *setting, bool wraparound)
{
   return cheat_manager_search(CHEAT_SEARCH_TYPE_EQPLUS) ;
}
int cheat_manager_search_eqminus(rarch_setting_t *setting, bool wraparound)
{
   return cheat_manager_search(CHEAT_SEARCH_TYPE_EQMINUS) ;
}

int cheat_manager_search(enum cheat_search_type search_type)
{
   char msg[100];
   unsigned char *curr         = cheat_manager_state.curr_memory_buf;
   unsigned char *prev         = cheat_manager_state.prev_memory_buf;
   unsigned int idx            = 0;
   unsigned int curr_val       = 0;
   unsigned int prev_val       = 0;
   unsigned int mask           = 0;
   unsigned int bytes_per_item = 1;
   unsigned int bits           = 8;
   bool refresh                = false;

   if (!cheat_manager_state.curr_memory_buf)
   {
      runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_NOT_INITIALIZED), 1, 180, true);
      return 0 ;
   }


   cheat_manager_setup_search_meta(cheat_manager_state.search_bit_size, &bytes_per_item, &mask, &bits) ;

   /* little endian FF000000 = 256 */
   for (idx = 0 ; idx < cheat_manager_state.total_memory_size ; idx = idx + bytes_per_item)
   {
      unsigned byte_part;

      switch (bytes_per_item)
      {
         case 2 :
         {
            curr_val = cheat_manager_state.big_endian ?
                  (*(curr+idx)*256) + *(curr+idx+1) :
                  *(curr+idx) + (*(curr+idx+1)*256) ;
            prev_val = cheat_manager_state.big_endian ?
                  (*(prev+idx)*256) + *(prev+idx+1) :
                  *(prev+idx) + (*(prev+idx+1)*256) ;
            break ;
         }
         case 4 :
         {
            curr_val = cheat_manager_state.big_endian ?
                  (*(curr+idx)*256*256*256) + (*(curr+idx+1)*256*256) + (*(curr+idx+2)*256) + *(curr+idx+3) :
                  *(curr+idx) + (*(curr+idx+1)*256) + (*(curr+idx+2)*256*256) + (*(curr+idx+3)*256*256*256) ;
            prev_val = cheat_manager_state.big_endian ?
                  (*(prev+idx)*256*256*256) + (*(prev+idx+1)*256*256) + (*(prev+idx+2)*256) + *(prev+idx+3) :
                  *(prev+idx) + (*(prev+idx+1)*256) + (*(prev+idx+2)*256*256) + (*(prev+idx+3)*256*256*256) ;
            break ;
         }
         case 1 :
         default :
         {
            curr_val = *(curr+idx) ;
            prev_val = *(prev+idx) ;
            break ;
         }
      }

      for (byte_part = 0 ; byte_part < 8/bits ; byte_part++)
      {
         unsigned int curr_subval = (curr_val >> (byte_part*bits) ) & mask ;
         unsigned int prev_subval = (prev_val >> (byte_part*bits) ) & mask ;
         unsigned int prev_match ;

         if (bits < 8 )
            prev_match = *(cheat_manager_state.matches+idx) & (mask << (byte_part*bits)) ;
         else
            prev_match = *(cheat_manager_state.matches+idx) ;

         if (prev_match > 0)
         {
            bool match = false ;
            switch (search_type)
            {
               case CHEAT_SEARCH_TYPE_EXACT :
                  match = ( curr_subval == cheat_manager_state.search_exact_value) ;
                  break;
               case CHEAT_SEARCH_TYPE_LT :
                  match = ( curr_subval < prev_subval) ;
                  break;
               case CHEAT_SEARCH_TYPE_GT :
                  match = ( curr_subval > prev_subval) ;
                  break;
               case CHEAT_SEARCH_TYPE_LTE :
                  match = ( curr_subval <= prev_subval) ;
                  break;
               case CHEAT_SEARCH_TYPE_GTE :
                  match = ( curr_subval >= prev_subval) ;
                  break;
               case CHEAT_SEARCH_TYPE_EQ :
                  match = ( curr_subval == prev_subval) ;
                  break;
               case CHEAT_SEARCH_TYPE_NEQ :
                  match = ( curr_subval != prev_subval) ;
                  break;
               case CHEAT_SEARCH_TYPE_EQPLUS :
                  match = ( curr_subval == prev_subval+cheat_manager_state.search_eqplus_value) ;
                  break;
               case CHEAT_SEARCH_TYPE_EQMINUS :
                  match = ( curr_subval == prev_subval-cheat_manager_state.search_eqminus_value) ;
                  break;
            }
            if (!match )
            {
               if ( bits < 8 )
                  *(cheat_manager_state.matches+idx) = *(cheat_manager_state.matches+idx) &
                        (( ~(mask << (byte_part*bits))) & 0xFF );
               else
                  memset(cheat_manager_state.matches+idx,0,bytes_per_item) ;
               if ( cheat_manager_state.num_matches > 0 )
                  cheat_manager_state.num_matches-- ;
            }
         }
      }
   }

   memcpy(cheat_manager_state.prev_memory_buf, cheat_manager_state.curr_memory_buf, cheat_manager_state.actual_memory_size);

   snprintf(msg, sizeof(msg), msg_hash_to_str(MSG_CHEAT_SEARCH_FOUND_MATCHES), cheat_manager_state.num_matches) ;
   msg[sizeof(msg) - 1] = 0;

   runloop_msg_queue_push(msg, 1, 180, true);

#ifdef HAVE_MENU
   menu_entries_ctl(MENU_ENTRIES_CTL_SET_REFRESH, &refresh);
   menu_driver_ctl(RARCH_MENU_CTL_SET_PREVENT_POPULATE, NULL);
#endif
   return 0 ;
}

bool cheat_manager_add_new_code(unsigned int memory_search_size, unsigned int address, unsigned int address_mask,
      bool big_endian, unsigned int value)
{
   int new_size = cheat_manager_get_size() + 1;

   if ( !cheat_manager_realloc(new_size, CHEAT_HANDLER_TYPE_RETRO) )
      return false ;

   cheat_manager_state.cheats[cheat_manager_state.size-1].address = address ;
   cheat_manager_state.cheats[cheat_manager_state.size-1].address_mask = address_mask ;
   cheat_manager_state.cheats[cheat_manager_state.size-1].memory_search_size = memory_search_size ;
   cheat_manager_state.cheats[cheat_manager_state.size-1].value = value ;
   cheat_manager_state.cheats[cheat_manager_state.size-1].big_endian = big_endian ;

   return true ;
}
int cheat_manager_add_matches(const char *path,
      const char *label, unsigned type, size_t menuidx, size_t entry_idx)
{
   char msg[100];
   bool refresh                = false;
   unsigned byte_part          = 0;
   unsigned int idx            = 0;
   unsigned int mask           = 0;
   unsigned int bytes_per_item = 1;
   unsigned int bits           = 8;
   unsigned int curr_val       = 0;
   unsigned int num_added      = 0;
   unsigned char         *curr = cheat_manager_state.curr_memory_buf;

   if ( cheat_manager_state.num_matches + cheat_manager_state.size > 100 )
   {
      runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_ADDED_MATCHES_TOO_MANY), 1, 180, true);
      return 0 ;
   }
   cheat_manager_setup_search_meta(cheat_manager_state.search_bit_size, &bytes_per_item, &mask, &bits) ;

   for (idx = 0 ; idx < cheat_manager_state.total_memory_size ; idx = idx + bytes_per_item)
   {
      switch ( bytes_per_item )
      {
         case 2 :
            curr_val = cheat_manager_state.big_endian ?
                  (*(curr+idx)*256) + *(curr+idx+1) :
                  *(curr+idx) + (*(curr+idx+1)*256) ;
            break ;
         case 4 :
            curr_val = cheat_manager_state.big_endian ?
                  (*(curr+idx)*256*256*256) + (*(curr+idx+1)*256*256) + (*(curr+idx+2)*256) + *(curr+idx+3) :
                  *(curr+idx) + (*(curr+idx+1)*256) + (*(curr+idx+2)*256*256) + (*(curr+idx+3)*256*256*256) ;
            break ;
         case 1 :
         default :
            curr_val = *(curr+idx) ;
            break ;
      }
      for (byte_part = 0 ; byte_part < 8/bits ; byte_part++)
      {
         unsigned int prev_match;

         if (bits < 8 )
         {
            prev_match = *(cheat_manager_state.matches+idx) & (mask << (byte_part*bits)) ;
            if (prev_match)
            {
               if (!cheat_manager_add_new_code(cheat_manager_state.search_bit_size, idx, (mask << (byte_part*bits)),
                     cheat_manager_state.big_endian, curr_val) )
               {
                  runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_ADDED_MATCHES_FAIL), 1, 180, true);
                  return 0 ;
               }
               num_added++ ;
            }
         }
         else
         {
            prev_match = *(cheat_manager_state.matches+idx) ;
            if (prev_match)
            {
               if (!cheat_manager_add_new_code(cheat_manager_state.search_bit_size, idx, 0xFF,
                     cheat_manager_state.big_endian, curr_val))
               {
                  runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_ADDED_MATCHES_FAIL), 1, 180, true);
                  return 0 ;
               }
               num_added++ ;
            }
         }

      }
   }

   snprintf(msg, sizeof(msg), msg_hash_to_str(MSG_CHEAT_SEARCH_ADDED_MATCHES_SUCCESS), cheat_manager_state.num_matches) ;
   msg[sizeof(msg) - 1] = 0;

   runloop_msg_queue_push(msg, 1, 180, true);

#ifdef HAVE_MENU
   menu_entries_ctl(MENU_ENTRIES_CTL_SET_REFRESH, &refresh);
   menu_driver_ctl(RARCH_MENU_CTL_SET_PREVENT_POPULATE, NULL);
#endif

   return 0;
}

void cheat_manager_apply_rumble(struct item_cheat *cheat, unsigned int curr_value)
{
   bool rumble = false;

   switch (cheat->rumble_type)
   {
      case RUMBLE_TYPE_DISABLED:
         return;
      case RUMBLE_TYPE_CHANGES:
         rumble = (curr_value != cheat->rumble_prev_value) ;
         break ;
      case RUMBLE_TYPE_DOES_NOT_CHANGE:
         rumble = (curr_value == cheat->rumble_prev_value) ;
         break ;
      case RUMBLE_TYPE_INCREASE:
         rumble = (curr_value > cheat->rumble_prev_value) ;
         break ;
      case RUMBLE_TYPE_DECREASE:
         rumble = (curr_value < cheat->rumble_prev_value) ;
         break ;
      case RUMBLE_TYPE_EQ_VALUE:
         rumble = (curr_value == cheat->rumble_value) ;
         break ;
      case RUMBLE_TYPE_NEQ_VALUE:
         rumble = (curr_value != cheat->rumble_value) ;
         break ;
      case RUMBLE_TYPE_LT_VALUE:
         rumble = (curr_value < cheat->rumble_value) ;
         break ;
      case RUMBLE_TYPE_GT_VALUE:
         rumble = (curr_value > cheat->rumble_value) ;
         break;
      case RUMBLE_TYPE_INCREASE_BY_VALUE:
         rumble = (curr_value == cheat->rumble_prev_value + cheat->rumble_value) ;
         break ;
      case RUMBLE_TYPE_DECREASE_BY_VALUE:
         rumble = (curr_value == cheat->rumble_prev_value - cheat->rumble_value) ;
         break ;
   }

   cheat->rumble_prev_value = curr_value ;

   /* Give the emulator enough time 
    * to initialize, load state, etc */
   if (cheat->rumble_initialized > 300)
   {
      if (rumble)
      {
         cheat->rumble_primary_end_time = cpu_features_get_time_usec() + (cheat->rumble_primary_duration*1000) ;
         cheat->rumble_secondary_end_time = cpu_features_get_time_usec() + (cheat->rumble_secondary_duration*1000) ;
         input_driver_set_rumble_state(cheat->rumble_port, RETRO_RUMBLE_STRONG, cheat->rumble_primary_strength);
         input_driver_set_rumble_state(cheat->rumble_port, RETRO_RUMBLE_WEAK, cheat->rumble_secondary_strength);
      }
   }
   else
   {
      cheat->rumble_initialized++ ;
      return;
   }

   if (cheat->rumble_primary_end_time <= cpu_features_get_time_usec() )
   {
      if (cheat->rumble_primary_end_time != 0)
         input_driver_set_rumble_state(cheat->rumble_port, RETRO_RUMBLE_STRONG, 0);
      cheat->rumble_primary_end_time = 0;
   }
   else
   {
      input_driver_set_rumble_state(cheat->rumble_port, RETRO_RUMBLE_STRONG, cheat->rumble_primary_strength);
   }

   if (cheat->rumble_secondary_end_time <= cpu_features_get_time_usec())
   {
      if (cheat->rumble_secondary_end_time != 0)
         input_driver_set_rumble_state(cheat->rumble_port, RETRO_RUMBLE_WEAK, 0);
      cheat->rumble_secondary_end_time = 0 ;
   }
   else
   {
      input_driver_set_rumble_state(cheat->rumble_port, RETRO_RUMBLE_WEAK, cheat->rumble_secondary_strength);
   }
}

void cheat_manager_apply_retro_cheats(void)
{
   unsigned i;
   unsigned int mask           = 0;
   unsigned int bytes_per_item = 1;
   unsigned int bits           = 8;
   unsigned int curr_val       = 0;
   bool run_cheat              = true;

   if ((!cheat_manager_state.cheats))
      return;

   for (i = 0 ; i < cheat_manager_state.size ; i++ )
   {
      unsigned char *curr;
      unsigned int    idx;
      bool set_value            = false;
      unsigned int value_to_set = 0;
      unsigned int repeat_iter = 0 ;
      unsigned int address_mask = cheat_manager_state.cheats[i].address_mask ;

      if (cheat_manager_state.cheats[i].handler != CHEAT_HANDLER_TYPE_RETRO || !cheat_manager_state.cheats[i].state)
         continue ;
      if (!cheat_manager_state.memory_initialized)
         cheat_manager_initialize_memory(NULL, false) ;

      /* If we're still not initialized, something 
       * must have gone wrong - just bail */
      if (!cheat_manager_state.memory_initialized)
         return;

      if (!run_cheat)
      {
         run_cheat = true ;
         continue ;
      }
      cheat_manager_setup_search_meta(cheat_manager_state.cheats[i].memory_search_size, &bytes_per_item, &mask, &bits) ;
      
      curr = cheat_manager_state.curr_memory_buf ;
      idx  = cheat_manager_state.cheats[i].address ;

      switch (bytes_per_item)
      {
         case 2 :
         {
            curr_val = cheat_manager_state.big_endian ?
                  (*(curr+idx)*256) + *(curr+idx+1) :
                  *(curr+idx) + (*(curr+idx+1)*256) ;
            break ;
         }
         case 4 :
         {
            curr_val = cheat_manager_state.big_endian ?
                  (*(curr+idx)*256*256*256) + (*(curr+idx+1)*256*256) + (*(curr+idx+2)*256) + *(curr+idx+3) :
                  *(curr+idx) + (*(curr+idx+1)*256) + (*(curr+idx+2)*256*256) + (*(curr+idx+3)*256*256*256) ;
            break ;
         }
         case 1 :
         default :
         {
            curr_val = *(curr+idx) ;
            break ;
         }
      }

      cheat_manager_apply_rumble(&cheat_manager_state.cheats[i], curr_val) ;

      switch (cheat_manager_state.cheats[i].cheat_type )
      {
         case CHEAT_TYPE_SET_TO_VALUE :
            set_value = true ;
            value_to_set = cheat_manager_state.cheats[i].value ;
            break ;
         case CHEAT_TYPE_INCREASE_VALUE:
            set_value = true ;
            value_to_set = curr_val + cheat_manager_state.cheats[i].value ;
            break;
         case CHEAT_TYPE_DECREASE_VALUE:
            set_value = true ;
            value_to_set = curr_val - cheat_manager_state.cheats[i].value ;
            break;
         case CHEAT_TYPE_RUN_NEXT_IF_EQ:
            if (!(curr_val == cheat_manager_state.cheats[i].value))
               run_cheat = false ;
            break;
         case CHEAT_TYPE_RUN_NEXT_IF_NEQ:
            if (!(curr_val != cheat_manager_state.cheats[i].value ))
               run_cheat = false ;
            break;
         case CHEAT_TYPE_RUN_NEXT_IF_LT:
            if (!(cheat_manager_state.cheats[i].value <  curr_val))
               run_cheat = false ;
            break;
         case CHEAT_TYPE_RUN_NEXT_IF_GT:
            if (!(cheat_manager_state.cheats[i].value > curr_val))
               run_cheat = false ;
            break;

      }
      if (set_value)
      {
         for ( repeat_iter = 1 ; repeat_iter <= cheat_manager_state.cheats[i].repeat_count ; repeat_iter++)
         {
            switch (bytes_per_item)
            {
               case 2 :
                  if  (cheat_manager_state.cheats[i].big_endian)
                  {
                     *(curr+idx)   = (value_to_set >> 8) & 0xFF ;
                     *(curr+idx+1) =  value_to_set & 0xFF ;
                  }
                  else
                  {
                     *(curr+idx)   =  value_to_set & 0xFF ;
                     *(curr+idx+1) = (value_to_set >> 8) & 0xFF ;

                  }
                  break ;
               case 4 :
                  if  (cheat_manager_state.cheats[i].big_endian)
                  {
                     *(curr+idx)   = (value_to_set >> 24) & 0xFF ;
                     *(curr+idx+1) = (value_to_set >> 16) & 0xFF ;
                     *(curr+idx+2) = (value_to_set >> 8) & 0xFF ;
                     *(curr+idx+3) =  value_to_set & 0xFF ;
                  }
                  else
                  {
                     *(curr+idx)   =  value_to_set & 0xFF ;
                     *(curr+idx+1) = (value_to_set >> 8) & 0xFF ;
                     *(curr+idx+2) = (value_to_set >> 16) & 0xFF ;
                     *(curr+idx+3) = (value_to_set >> 24) & 0xFF ;

                  }
                  break ;
               case 1 :
                  if (bits < 8)
                  {
                     unsigned bitpos;
                     unsigned char val = *(curr+idx);

                     for (bitpos = 0 ; bitpos < 8 ; bitpos++)
                     {
                        if ((address_mask>>bitpos)&0x01 )
                        {
                           mask = (~(1<<bitpos)&0xFF) ;
                           /* Clear current bit value */
                           val = val & mask ;
                           /* Inject cheat bit value */
                           val = val | (((value_to_set>>bitpos)&0x01)<<bitpos) ;
                        }
                     }
                     *(curr+idx) = val ;
                  }
                  else
                     *(curr+idx)   =  value_to_set & 0xFF;
                  break ;
               default :
                  *(curr+idx)   =  value_to_set & 0xFF ;
                  break ;
            }
            value_to_set += cheat_manager_state.cheats[i].repeat_add_to_value ;
            value_to_set = value_to_set%mask ;

            if ( bits < 8 )
            {
               unsigned int bit_iter ;
               for ( bit_iter = 0 ; bit_iter < cheat_manager_state.cheats[i].repeat_add_to_address ; bit_iter++)
               {
                  address_mask = (address_mask<<mask)&0xFF ;
                  if ( address_mask == 0 )
                  {
                     address_mask = mask ;
                     idx++ ;
                  }
               }
            }
            else
            {
               idx += (cheat_manager_state.cheats[i].repeat_add_to_address*bytes_per_item) ;
            }

            idx = idx%cheat_manager_state.total_memory_size ;
         }
      }
   }
}
void cheat_manager_match_action(enum cheat_match_action_type match_action, unsigned int target_match_idx, unsigned int *address, unsigned int *address_mask,
      unsigned int *prev_value, unsigned int *curr_value)
{
   unsigned int byte_part;
   unsigned int idx;
   unsigned int start_idx;
   unsigned int mask = 0 ;
   unsigned int bytes_per_item = 1 ;
   unsigned int bits = 8 ;
   unsigned int curr_val = 0 ;
   unsigned int prev_val = 0 ;
   unsigned char *curr = cheat_manager_state.curr_memory_buf ;
   unsigned char *prev = cheat_manager_state.prev_memory_buf ;
   unsigned int curr_match_idx = 0;

   if (target_match_idx > cheat_manager_state.num_matches-1)
      return;

   if (!curr)
      return;

   cheat_manager_setup_search_meta(cheat_manager_state.search_bit_size, &bytes_per_item, &mask, &bits);

   if (match_action == CHEAT_MATCH_ACTION_TYPE_BROWSE)
      start_idx = *address ;
   else
      start_idx = 0 ;

   for (idx = start_idx ; idx < cheat_manager_state.total_memory_size ; idx = idx + bytes_per_item)
   {
      switch (bytes_per_item )
      {
         case 2 :
            curr_val = cheat_manager_state.big_endian ?
                  (*(curr+idx)*256) + *(curr+idx+1) :
                  *(curr+idx) + (*(curr+idx+1)*256) ;
            if (prev != NULL)
               prev_val = cheat_manager_state.big_endian ?
                     (*(prev+idx)*256) + *(prev+idx+1) :
                     *(prev+idx) + (*(prev+idx+1)*256) ;
            break ;
         case 4 :
            curr_val = cheat_manager_state.big_endian ?
                  (*(curr+idx)*256*256*256) + (*(curr+idx+1)*256*256) + (*(curr+idx+2)*256) + *(curr+idx+3) :
                  *(curr+idx) + (*(curr+idx+1)*256) + (*(curr+idx+2)*256*256) + (*(curr+idx+3)*256*256*256) ;
            if (prev != NULL)
               prev_val = cheat_manager_state.big_endian ?
                     (*(prev+idx)*256*256*256) + (*(prev+idx+1)*256*256) + (*(prev+idx+2)*256) + *(prev+idx+3) :
                     *(prev+idx) + (*(prev+idx+1)*256) + (*(prev+idx+2)*256*256) + (*(prev+idx+3)*256*256*256) ;
            break ;
         case 1 :
         default :
            curr_val = *(curr+idx) ;
            if (prev != NULL)
               prev_val = *(prev+idx) ;
            break ;
      }

      if (match_action == CHEAT_MATCH_ACTION_TYPE_BROWSE)
      {
         *curr_value = curr_val;
         *prev_value = prev_val;
         return ;
      }

      if (!prev)
         return;

      for (byte_part = 0 ; byte_part < 8/bits ; byte_part++)
      {
         unsigned int prev_match ;

         if (bits < 8 )
         {
            prev_match = *(cheat_manager_state.matches+idx) & (mask << (byte_part*bits)) ;
            if (prev_match)
            {
               if (target_match_idx == curr_match_idx)
               {
                  switch (match_action)
                  {
                     case CHEAT_MATCH_ACTION_TYPE_BROWSE :
                        return ;
                     case CHEAT_MATCH_ACTION_TYPE_VIEW :
                        *address = idx ;
                        *address_mask = (mask << (byte_part*bits)) ;
                        *curr_value = curr_val ;
                        *prev_value = prev_val ;
                        return;
                     case CHEAT_MATCH_ACTION_TYPE_COPY :
                        if (!cheat_manager_add_new_code(cheat_manager_state.search_bit_size, idx, (mask << (byte_part*bits)),
                                 cheat_manager_state.big_endian, curr_val) )
                           runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_ADD_MATCH_FAIL), 1, 180, true);
                        else
                           runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_ADD_MATCH_SUCCESS), 1, 180, true);
                        return ;
                     case CHEAT_MATCH_ACTION_TYPE_DELETE :
                        if (bits < 8)
                           *(cheat_manager_state.matches+idx) = *(cheat_manager_state.matches+idx) &
                              (( ~(mask << (byte_part*bits))) & 0xFF );
                        else
                           memset(cheat_manager_state.matches+idx,0,bytes_per_item) ;
                        if ( cheat_manager_state.num_matches > 0 )
                           cheat_manager_state.num_matches-- ;
                        runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_DELETE_MATCH_SUCCESS), 1, 180, true);
                        return;
                  }
                  return;
               }
               curr_match_idx++ ;
            }
         }
         else
         {
            prev_match = *(cheat_manager_state.matches+idx) ;
            if (prev_match)
            {
               if (target_match_idx == curr_match_idx)
               {
                  switch (match_action)
                  {
                     case CHEAT_MATCH_ACTION_TYPE_BROWSE :
                        return ;
                     case CHEAT_MATCH_ACTION_TYPE_VIEW :
                        *address = idx ;
                        *address_mask = 0xFF ;
                        *curr_value = curr_val ;
                        *prev_value = prev_val ;
                        return ;
                     case CHEAT_MATCH_ACTION_TYPE_COPY :
                        if ( !cheat_manager_add_new_code(cheat_manager_state.search_bit_size, idx, 0xFF,
                                 cheat_manager_state.big_endian, curr_val) )
                           runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_ADD_MATCH_FAIL), 1, 180, true);
                        else
                           runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_ADD_MATCH_SUCCESS), 1, 180, true);
                        return ;
                     case CHEAT_MATCH_ACTION_TYPE_DELETE :
                        if ( bits < 8 )
                           *(cheat_manager_state.matches+idx) = *(cheat_manager_state.matches+idx) &
                              (( ~(mask << (byte_part*bits))) & 0xFF );
                        else
                           memset(cheat_manager_state.matches+idx,0,bytes_per_item) ;
                        if ( cheat_manager_state.num_matches > 0 )
                           cheat_manager_state.num_matches-- ;
                        runloop_msg_queue_push(msg_hash_to_str(MSG_CHEAT_SEARCH_DELETE_MATCH_SUCCESS), 1, 180, true);
                        return ;
                  }
               }
               curr_match_idx++ ;
            }
         }

      }
   }
}
int cheat_manager_copy_match(rarch_setting_t *setting, bool wraparound)
{
   cheat_manager_match_action(CHEAT_MATCH_ACTION_TYPE_COPY,
	   cheat_manager_state.match_idx, NULL, NULL, NULL, NULL) ;
   return 0 ;
}

int cheat_manager_delete_match(rarch_setting_t *setting, bool wraparound)
{
   bool refresh = false;
   cheat_manager_match_action(CHEAT_MATCH_ACTION_TYPE_DELETE,
	   cheat_manager_state.match_idx, NULL, NULL, NULL, NULL);
#ifdef HAVE_MENU
   menu_entries_ctl(MENU_ENTRIES_CTL_SET_REFRESH, &refresh);
   menu_driver_ctl(RARCH_MENU_CTL_SET_PREVENT_POPULATE, NULL);
#endif
   return 0;
}