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2350b19d0b
NINTV-DS/arm9/source/savestate.cpp
wavemotion-dave 2350b19d0b Refactored loadgame into new sourcefile.
2021-10-24 11:57:45 -04:00

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// =====================================================================================
// Copyright (c) 2021 Dave Bernazzani (wavemotion-dave)
//
// Copying and distribution of this emulator, it's source code and associated
// readme files, with or without modification, are permitted in any medium without
// royalty provided the this copyright notice is used and wavemotion-dave (NINTV-DS)
// and Kyle Davis (BLISS) are thanked profusely.
//
// The NINTV-DS emulator is offered as-is, without any warranty.
// =====================================================================================
#include <nds.h>
#include <stdio.h>
#include <fat.h>
#include <dirent.h>
#include <unistd.h>
#include "ds_tools.h"
#include "savestate.h"
#include "bgHighScore.h"
#include "config.h"
extern Emulator *currentEmu;
extern Rip *currentRip;
extern UINT16 global_frames;
#define CURRENT_SAVE_FILE_VER 0x0006
struct
{
UINT16 saveFileVersion;
UINT8 bSlotUsed[3];
char slotTimestamp[3][20];
struct _stateStruct slot[3];
} saveState;
// Only for the games that require this... it's larger than all of the other saveState stuff above...
JLPState jlpState[3];
extern UINT16 jlp_ram[];
char savefilename[128];
BOOL do_save(const CHAR* filename, UINT8 slot)
{
BOOL didSave = FALSE;
time_t unixTime = time(NULL);
struct tm* timeStruct = gmtime((const time_t *)&unixTime);
saveState.saveFileVersion = CURRENT_SAVE_FILE_VER;
saveState.bSlotUsed[slot] = TRUE;
sprintf(saveState.slotTimestamp[slot], "%02d-%02d-%04d %02d:%02d:%02d", timeStruct->tm_mday, timeStruct->tm_mon+1, timeStruct->tm_year+1900, timeStruct->tm_hour, timeStruct->tm_min, timeStruct->tm_sec);
// Ask the emulator to save it's state...
currentEmu->SaveState(&saveState.slot[slot]);
saveState.slot[slot].global_frames = global_frames;
saveState.slot[slot].emu_frames = emu_frames;
// Only a few games utilize extra RAM that isn't specifically JLP RAM - Chess and Land Battle
for (int i=0; i<0x800; i++) saveState.slot[slot].extraRAM[i] = jlp_ram[i];
// Only a few games utilize JLP RAM...
if (currentRip->JLP16Bit) currentRip->JLP16Bit->getState(&jlpState[slot]);
FILE* file = fopen(filename, "wb+");
if (file != NULL)
{
fwrite(&saveState, 1, sizeof(saveState), file);
if (currentRip->JLP16Bit) fwrite(&jlpState, 1, sizeof(jlpState), file);
didSave = TRUE;
fclose(file);
}
return didSave;
}
BOOL do_load(const CHAR* filename, UINT8 slot)
{
BOOL didLoadState = FALSE;
memset(&saveState, 0x00, sizeof(saveState));
FILE* file = fopen(filename, "rb");
if (file != NULL)
{
int size = fread(&saveState, 1, sizeof(saveState), file);
if ((size != sizeof(saveState)) || (saveState.saveFileVersion != CURRENT_SAVE_FILE_VER))
{
memset(&saveState, 0x00, sizeof(saveState));
memset(&jlpState, 0x00, sizeof(jlpState));
}
else
{
if (currentRip->JLP16Bit) fread(&jlpState, 1, sizeof(jlpState), file);
// Ask the emulator to restore it's state...
currentEmu->LoadState(&saveState.slot[slot]);
for (int i=0; i<0x800; i++) jlp_ram[i] = saveState.slot[slot].extraRAM[i];
if (currentRip->JLP16Bit) currentRip->JLP16Bit->setState(&jlpState[slot]);
global_frames = saveState.slot[slot].global_frames;
emu_frames = saveState.slot[slot].emu_frames;
if (myGlobalConfig.erase_saves)
{
remove(savefilename);
}
didLoadState = TRUE;
}
fclose(file);
}
return didLoadState;
}
void get_save_filename(void)
{
if (myGlobalConfig.save_dir == 1)
{
DIR* dir = opendir("/roms/sav"); // See if directory exists
if (dir) closedir(dir); // Directory exists. All good.
else mkdir("/roms/sav", 0777); // Doesn't exist - make it...
strcpy(savefilename, "/roms/sav/");
}
else if (myGlobalConfig.save_dir == 2)
{
DIR* dir = opendir("/roms/intv/sav"); // See if directory exists
if (dir) closedir(dir); // Directory exists. All good.
else mkdir("/roms/intv/sav", 0777); // Doesn't exist - make it...
strcpy(savefilename, "/roms/intv/sav/");
}
else if (myGlobalConfig.save_dir == 3)
{
DIR* dir = opendir("/data/sav"); // See if directory exists
if (dir) closedir(dir); // Directory exists. All good.
else mkdir("/data/sav", 0777); // Doesn't exist - make it...
strcpy(savefilename, "/data/sav/");
}
else strcpy(savefilename, "");
strcat(savefilename, currentRip->GetFileName());
savefilename[strlen(savefilename)-4] = 0;
strcat(savefilename, ".sav");
}
void just_read_save_file(void)
{
if (currentRip != NULL)
{
get_save_filename();
memset(&saveState, 0x00, sizeof(saveState));
FILE* file = fopen(savefilename, "rb");
if (file != NULL)
{
int size = fread(&saveState, 1, sizeof(saveState), file);
fclose(file);
if ((size != sizeof(saveState)) || (saveState.saveFileVersion != CURRENT_SAVE_FILE_VER))
{
memset(&saveState, 0x00, sizeof(saveState));
}
}
}
}
void state_save(UINT8 slot)
{
if (currentRip != NULL)
{
get_save_filename();
dsPrintValue(10,23,0, (char*)"STATE SAVED");
do_save(savefilename, slot);
WAITVBL;WAITVBL;WAITVBL;
dsPrintValue(10,23,0, (char*)" ");
}
}
BOOL state_restore(UINT8 slot)
{
if (currentRip != NULL)
{
if (saveState.bSlotUsed[slot] == TRUE)
{
get_save_filename();
dsPrintValue(10,23,0, (char*)"STATE RESTORED");
do_load(savefilename, slot);
WAITVBL;WAITVBL;WAITVBL;WAITVBL;
dsPrintValue(10,23,0, (char*)" ");
return TRUE;
}
}
return FALSE;
}
void clear_save_file(void)
{
if (currentRip != NULL)
{
get_save_filename();
remove(savefilename);
memset(&saveState, 0x00, sizeof(saveState));
WAITVBL;WAITVBL;WAITVBL;WAITVBL;
dsPrintValue(10,23,0, (char*)" ");
}
}
#define SAVE_MENU_ITEMS 8
const char *savestate_menu[SAVE_MENU_ITEMS] =
{
"SAVE TO SLOT 1",
"SAVE TO SLOT 2",
"SAVE TO SLOT 3",
"RESTORE FROM SLOT 1",
"RESTORE FROM SLOT 2",
"RESTORE FROM SLOT 3",
"ERASE SAVE FILE",
"EXIT THIS MENU",
};
void show_slot_info(UINT8 slot)
{
if (slot == 255)
{
dsPrintValue(8,15, 0, (char*)" ");
dsPrintValue(8,16, 0, (char*)" ");
}
else
{
if (saveState.bSlotUsed[slot] == FALSE)
{
dsPrintValue(8,15, 0, (char*)"THIS SLOT IS EMPTY ");
dsPrintValue(8,16, 0, (char*)" ");
}
else
{
dsPrintValue(8,15, 0, (char*)"THIS SLOT LAST SAVED ");
dsPrintValue(8,16, 0, (char*)saveState.slotTimestamp[slot]);
}
}
}
void savestate_entry(void)
{
UINT8 current_entry = 0;
char bDone = 0;
just_read_save_file();
decompress(bgHighScoreTiles, bgGetGfxPtr(bg0b), LZ77Vram);
decompress(bgHighScoreMap, (void*) bgGetMapPtr(bg0b), LZ77Vram);
dmaCopy((void *) bgHighScorePal,(u16*) BG_PALETTE_SUB,256*2);
unsigned short dmaVal = *(bgGetMapPtr(bg1b) +31*32);
dmaFillWords(dmaVal | (dmaVal<<16),(void*) bgGetMapPtr(bg1b),32*24*2);
swiWaitForVBlank();
dsPrintValue(8,3,0, (char*)"SAVE/RESTORE STATE");
dsPrintValue(4,20,0, (char*)"PRESS UP/DOWN AND A=SELECT");
for (int i=0; i<SAVE_MENU_ITEMS; i++)
{
dsPrintValue(8,5+i, (i==0 ? 1:0), (char*)savestate_menu[i]);
}
show_slot_info(0);
int last_keys_pressed = -1;
while (!bDone)
{
int keys_pressed = keysCurrent();
if (keys_pressed != last_keys_pressed)
{
last_keys_pressed = keys_pressed;
if (keys_pressed & KEY_DOWN)
{
dsPrintValue(8,5+current_entry, 0, (char*)savestate_menu[current_entry]);
if (current_entry < (SAVE_MENU_ITEMS-1)) current_entry++; else current_entry=0;
dsPrintValue(8,5+current_entry, 1, (char*)savestate_menu[current_entry]);
if (current_entry == 0 || current_entry == 3) show_slot_info(0);
else if (current_entry == 1 || current_entry == 4) show_slot_info(1);
else if (current_entry == 2 || current_entry == 5) show_slot_info(2);
else show_slot_info(255);
}
if (keys_pressed & KEY_UP)
{
dsPrintValue(8,5+current_entry, 0, (char*)savestate_menu[current_entry]);
if (current_entry > 0) current_entry--; else current_entry=(SAVE_MENU_ITEMS-1);
dsPrintValue(8,5+current_entry, 1, (char*)savestate_menu[current_entry]);
if (current_entry == 0 || current_entry == 3) show_slot_info(0);
else if (current_entry == 1 || current_entry == 4) show_slot_info(1);
else if (current_entry == 2 || current_entry == 5) show_slot_info(2);
else show_slot_info(255);
}
if (keys_pressed & KEY_A)
{
switch (current_entry)
{
case 0:
state_save(0);
show_slot_info(0);
break;
case 1:
state_save(1);
show_slot_info(1);
break;
case 2:
state_save(2);
show_slot_info(2);
break;
case 3:
if (state_restore(0)) bDone=1;
break;
case 4:
if (state_restore(1)) bDone=1;
break;
case 5:
if (state_restore(2)) bDone=1;
break;
case 6:
clear_save_file();
show_slot_info(255);
break;
case 7:
bDone=1;
break;
}
}
if (keys_pressed & KEY_B)
{
bDone = 1;
}
swiWaitForVBlank();
}
}
}
// End of file
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