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state.cpp
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state.cpp
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/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2002 Xodnizel
*
* This program 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 Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
// TODO: Add (better) file io error checking
#include "version.h"
#include "types.h"
#include "x6502.h"
#include "fceu.h"
#include "sound.h"
#include "utils/endian.h"
#include "utils/memory.h"
#include "utils/xstring.h"
#include "file.h"
#include "fds.h"
#include "state.h"
#include "movie.h"
#include "ppu.h"
#include "netplay.h"
#include "video.h"
#include "input.h"
#include "zlib.h"
#include "driver.h"
#ifdef _S9XLUA_H
#include "fceulua.h"
#endif
//TODO - we really need some kind of global platform-specific options api
#ifdef __WIN_DRIVER__
#include "drivers/win/main.h"
#include "drivers/win/cheat.h"
#include "drivers/win/ram_search.h"
#include "drivers/win/ramwatch.h"
#endif
#include <string>
#include <cstdio>
#include <cstdlib>
#include <cstring>
//#include <unistd.h> //mbg merge 7/17/06 removed
#include <vector>
#include <fstream>
using namespace std;
static void (*SPreSave)(void) = NULL;
static void (*SPostSave)(void) = NULL;
static int SaveStateStatus[10];
static int StateShow;
//tells the save system innards that we're loading the old format
bool FCEU_state_loading_old_format = false;
std::string lastSavestateMade; //Stores the filename of the last savestate made (needed for UndoSavestate)
bool undoSS = false; //This will be true if there is lastSavestateMade, it was made since ROM was loaded, a backup state for lastSavestateMade exists
bool redoSS = false; //This will be true if UndoSaveState is run, will turn false when a new savestate is made
std::string lastLoadstateMade; //Stores the filename of the last state loaded (needed for Undo/Redo loadstate)
bool undoLS = false; //This will be true if a backupstate was made and it was made since ROM was loaded
bool redoLS = false; //This will be true if a backupstate was loaded, meaning redoLoadState can be run
bool internalSaveLoad = false;
bool backupSavestates = true;
bool compressSavestates = true; //By default FCEUX compresses savestates when a movie is inactive.
// a temp memory stream. We'll be dumping some data here and then compress
static EMUFILE_MEMORY memory_savestate;
// temporary buffer for compressed data of a savestate
static std::vector<uint8> compressed_buf;
#define SFMDATA_SIZE (128)
static SFORMAT SFMDATA[SFMDATA_SIZE];
static int SFEXINDEX;
#define RLSB FCEUSTATE_RLSB //0x80000000
extern SFORMAT FCEUPPU_STATEINFO[];
extern SFORMAT FCEU_NEWPPU_STATEINFO[];
extern SFORMAT FCEUSND_STATEINFO[];
extern SFORMAT FCEUCTRL_STATEINFO[];
extern SFORMAT FCEUMOV_STATEINFO[];
//why two separate CPU structs?? who knows
SFORMAT SFCPU[]={
{ &X.PC, 2|RLSB, "PC\0"},
{ &X.A, 1, "A\0\0"},
{ &X.X, 1, "X\0\0"},
{ &X.Y, 1, "Y\0\0"},
{ &X.S, 1, "S\0\0"},
{ &X.P, 1, "P\0\0"},
{ &X.DB, 1, "DB\0"},
{ &RAM, 0x800 | FCEUSTATE_INDIRECT, "RAM", },
{ 0 }
};
SFORMAT SFCPUC[]={
{ &X.jammed, 1, "JAMM"},
{ &X.IRQlow, 4|RLSB, "IQLB"},
{ &X.tcount, 4|RLSB, "ICoa"},
{ &X.count, 4|RLSB, "ICou"},
{ ×tampbase, sizeof(timestampbase) | RLSB, "TSBS"},
{ &X.mooPI, 1, "MooP"}, // alternative to the "quick and dirty hack"
{ 0 }
};
void foo(uint8* test) { (void)test; }
static int SubWrite(EMUFILE* os, SFORMAT *sf)
{
uint32 acc=0;
while(sf->v)
{
if(sf->s==~0u) //Link to another struct
{
uint32 tmp;
if(!(tmp=SubWrite(os,(SFORMAT *)sf->v)))
return(0);
acc+=tmp;
sf++;
continue;
}
acc+=8; //Description + size
acc+=sf->s&(~FCEUSTATE_FLAGS);
if(os) //Are we writing or calculating the size of this block?
{
os->fwrite(sf->desc,4);
write32le(sf->s&(~FCEUSTATE_FLAGS),os);
#ifdef FCEU_BIG_ENDIAN
if(sf->s&RLSB)
FlipByteOrder((uint8*)sf->v,sf->s&(~FCEUSTATE_FLAGS));
#endif
if(sf->s&FCEUSTATE_INDIRECT)
os->fwrite(*(char **)sf->v,sf->s&(~FCEUSTATE_FLAGS));
else
os->fwrite((char*)sf->v,sf->s&(~FCEUSTATE_FLAGS));
//Now restore the original byte order.
#ifdef FCEU_BIG_ENDIAN
if(sf->s&RLSB)
FlipByteOrder((uint8*)sf->v,sf->s&(~FCEUSTATE_FLAGS));
#endif
}
sf++;
}
return(acc);
}
static int WriteStateChunk(EMUFILE* os, int type, SFORMAT *sf)
{
os->fputc(type);
int bsize = SubWrite((EMUFILE*)0,sf);
write32le(bsize,os);
if(!SubWrite(os,sf))
{
return 5;
}
return (bsize+5);
}
static SFORMAT *CheckS(SFORMAT *sf, uint32 tsize, char *desc)
{
while(sf->v)
{
if(sf->s==~0u) // Link to another SFORMAT structure.
{
SFORMAT *tmp;
if((tmp= CheckS((SFORMAT *)sf->v, tsize, desc) ))
return(tmp);
sf++;
continue;
}
if(!memcmp(desc,sf->desc,4))
{
if(tsize!=(sf->s&(~FCEUSTATE_FLAGS)))
return(0);
return(sf);
}
sf++;
}
return(0);
}
static bool ReadStateChunk(EMUFILE* is, SFORMAT *sf, int size)
{
SFORMAT *tmp;
int temp = is->ftell();
while(is->ftell()<temp+size)
{
uint32 tsize;
char toa[4];
if(is->fread(toa,4)<4)
return false;
read32le(&tsize,is);
if((tmp=CheckS(sf,tsize,toa)))
{
if(tmp->s&FCEUSTATE_INDIRECT)
is->fread(*(char **)tmp->v,tmp->s&(~FCEUSTATE_FLAGS));
else
is->fread((char *)tmp->v,tmp->s&(~FCEUSTATE_FLAGS));
#ifdef FCEU_BIG_ENDIAN
if(tmp->s&RLSB)
FlipByteOrder((uint8*)tmp->v,tmp->s&(~FCEUSTATE_FLAGS));
#endif
}
else
is->fseek(tsize,SEEK_CUR);
} // while(...)
return true;
}
static int read_sfcpuc=0, read_snd=0;
void FCEUD_BlitScreen(uint8 *XBuf); //mbg merge 7/17/06 YUCKY had to add
void UpdateFCEUWindow(void); //mbg merge 7/17/06 YUCKY had to add
static bool ReadStateChunks(EMUFILE* is, int32 totalsize)
{
int t;
uint32 size;
bool ret=true;
bool warned=false;
read_sfcpuc=0;
read_snd=0;
//mbg 6/16/08 - wtf
//// int moo=X.mooPI;
// if(!scan_chunks)
// X.mooPI=/*X.P*/0xFF;
while(totalsize > 0)
{
t=is->fgetc();
if(t==EOF) break;
if(!read32le(&size,is)) break;
totalsize -= size + 5;
switch(t)
{
case 1:if(!ReadStateChunk(is,SFCPU,size)) ret=false;break;
case 3:if(!ReadStateChunk(is,FCEUPPU_STATEINFO,size)) ret=false;break;
case 31:if(!ReadStateChunk(is,FCEU_NEWPPU_STATEINFO,size)) ret=false;break;
case 4:if(!ReadStateChunk(is,FCEUCTRL_STATEINFO,size)) ret=false;break;
case 7:
if(!FCEUMOV_ReadState(is,size)) {
//allow this to fail in old-format savestates.
if(!FCEU_state_loading_old_format)
ret=false;
}
break;
case 0x10:
if(!ReadStateChunk(is,SFMDATA,size))
ret=false;
break;
// now it gets hackier:
case 5:
if(!ReadStateChunk(is,FCEUSND_STATEINFO,size))
ret=false;
else
read_snd=1;
break;
case 6:
if(FCEUMOV_Mode(MOVIEMODE_PLAY|MOVIEMODE_RECORD|MOVIEMODE_FINISHED))
{
if(!ReadStateChunk(is,FCEUMOV_STATEINFO,size)) ret=false;
}
else
{
is->fseek(size,SEEK_CUR);
}
break;
case 8:
// load back buffer
{
extern uint8 *XBackBuf;
//ignore 8 garbage bytes, whose idea was it to write these or even have them there in the first place
if(size == 256*256+8)
{
if(is->fread((char*)XBackBuf,256*256) != 256*256)
ret = false;
is->fseek(8,SEEK_CUR);
}
else
{
if(is->fread((char*)XBackBuf,size) != size)
ret = false;
}
//MBG TODO - can this be moved to a better place?
//does it even make sense, displaying XBuf when its XBackBuf we just loaded?
#ifdef __WIN_DRIVER__
if(ret)
{
FCEUD_BlitScreen(XBuf);
UpdateFCEUWindow();
}
#endif
}
break;
case 2:
{
if(!ReadStateChunk(is,SFCPUC,size))
ret=false;
else
read_sfcpuc=1;
} break;
default:
// for somebody's sanity's sake, at least warn about it:
if(!warned)
{
char str [256];
sprintf(str, "Warning: Found unknown save chunk of type %d.\nThis could indicate the save state is corrupted\nor made with a different (incompatible) emulator version.", t);
FCEUD_PrintError(str);
warned=true;
}
//if(fseek(st,size,SEEK_CUR)<0) goto endo;break;
is->fseek(size,SEEK_CUR);
}
}
//endo:
//mbg 6/16/08 - wtf
// if(X.mooPI==0xFF && !scan_chunks)
// {
//// FCEU_PrintError("prevmoo=%d, p=%d",moo,X.P);
// X.mooPI=X.P; // "Quick and dirty hack." //begone
// }
extern int resetDMCacc;
if(read_snd)
resetDMCacc=0;
else
resetDMCacc=1;
return ret;
}
int CurrentState=0;
extern int geniestage;
bool FCEUSS_SaveMS(EMUFILE* outstream, int compressionLevel)
{
// reinit memory_savestate
// memory_savestate is global variable which already has its vector of bytes, so no need to allocate memory every time we use save/loadstate
memory_savestate.set_len(0); // this also seeks to the beginning
memory_savestate.unfail();
EMUFILE* os = &memory_savestate;
uint32 totalsize = 0;
FCEUPPU_SaveState();
FCEUSND_SaveState();
totalsize=WriteStateChunk(os,1,SFCPU);
totalsize+=WriteStateChunk(os,2,SFCPUC);
totalsize+=WriteStateChunk(os,3,FCEUPPU_STATEINFO);
totalsize+=WriteStateChunk(os,31,FCEU_NEWPPU_STATEINFO);
totalsize+=WriteStateChunk(os,4,FCEUCTRL_STATEINFO);
totalsize+=WriteStateChunk(os,5,FCEUSND_STATEINFO);
if(FCEUMOV_Mode(MOVIEMODE_PLAY|MOVIEMODE_RECORD|MOVIEMODE_FINISHED))
{
totalsize+=WriteStateChunk(os,6,FCEUMOV_STATEINFO);
//MBG TAS Editor HACK HACK HACK!
//do not save the movie state if we are in Taseditor! That would be a huge waste of time and space!
if(!FCEUMOV_Mode(MOVIEMODE_TASEDITOR))
{
os->fseek(5,SEEK_CUR);
int size = FCEUMOV_WriteState(os);
os->fseek(-(size+5),SEEK_CUR);
os->fputc(7);
write32le(size, os);
os->fseek(size,SEEK_CUR);
totalsize += 5 + size;
}
}
// save back buffer
{
extern uint8 *XBackBuf;
uint32 size = 256 * 256;
os->fputc(8);
write32le(size, os);
os->fwrite((char*)XBackBuf,size);
totalsize += 5 + size;
}
if(SPreSave) SPreSave();
totalsize+=WriteStateChunk(os,0x10,SFMDATA);
if(SPostSave) SPostSave();
//save the length of the file
size_t len = memory_savestate.size();
//sanity check: len and totalsize should be the same
if(len != totalsize)
{
FCEUD_PrintError("sanity violation: len != totalsize");
return false;
}
int error = Z_OK;
uint8* cbuf = (uint8*)memory_savestate.buf();
uLongf comprlen = ~0lu;
if(compressionLevel != Z_NO_COMPRESSION && (compressSavestates || FCEUMOV_Mode(MOVIEMODE_TASEDITOR)))
{
// worst case compression: zlib says "0.1% larger than sourceLen plus 12 bytes"
comprlen = (len>>9)+12 + len;
if (compressed_buf.size() < comprlen) compressed_buf.resize(comprlen);
cbuf = &compressed_buf[0];
// do compression
error = compress2(cbuf, &comprlen, (uint8*)memory_savestate.buf(), len, compressionLevel);
}
//dump the header
uint8 header[16]="FCSX";
FCEU_en32lsb(header+4, totalsize);
FCEU_en32lsb(header+8, FCEU_VERSION_NUMERIC);
FCEU_en32lsb(header+12, comprlen);
//dump it to the destination file
outstream->fwrite((char*)header,16);
outstream->fwrite((char*)cbuf,comprlen==~0lu?totalsize:comprlen);
return error == Z_OK;
}
void FCEUSS_Save(const char *fname, bool display_message)
{
EMUFILE* st = 0;
std::string fn;
if (geniestage==1)
{
if (display_message)
FCEU_DispMessage("Cannot save FCS in GG screen.",0);
return;
}
if(fname) //If filename is given use it.
{
st = FCEUD_UTF8_fstream(fname, "wb");
fn.assign(fname);
}
else //Else, generate one
{
//FCEU_PrintError("daCurrentState=%d",CurrentState);
fn = FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0);
//backup existing savestate first
if (CheckFileExists(fn.c_str()) && backupSavestates) //adelikat: If the files exists and we are allowed to make backup savestates
{
CreateBackupSaveState(fn.c_str()); //Make a backup of previous savestate before overwriting it
lastSavestateMade.assign(fn); //Remember what the last savestate filename was (for undoing later)
undoSS = true; //Backup was created so undo is possible
}
else
undoSS = false; //so backup made so lastSavestateMade does have a backup file, so no undo
st = FCEUD_UTF8_fstream(fn.c_str(),"wb");
}
if (st == NULL || st->get_fp() == NULL)
{
if (display_message)
FCEU_DispMessage("State %d save error.", 0, CurrentState);
return;
}
#ifdef _S9XLUA_H
if (!internalSaveLoad)
{
LuaSaveData saveData;
CallRegisteredLuaSaveFunctions(CurrentState, saveData);
std::string luaSaveFilename;
luaSaveFilename.assign(fn.c_str());
luaSaveFilename.append(".luasav");
if(saveData.recordList)
{
FILE* luaSaveFile = fopen(luaSaveFilename.c_str(), "wb");
if(luaSaveFile)
{
saveData.ExportRecords(luaSaveFile);
fclose(luaSaveFile);
}
}
else
{
unlink(luaSaveFilename.c_str());
}
}
#endif
if(FCEUMOV_Mode(MOVIEMODE_INACTIVE))
FCEUSS_SaveMS(st,-1);
else
FCEUSS_SaveMS(st,0);
delete st;
if(!fname)
{
SaveStateStatus[CurrentState] = 1;
if (display_message)
FCEU_DispMessage("State %d saved.", 0, CurrentState);
}
redoSS = false; //we have a new savestate so redo is not possible
}
int FCEUSS_LoadFP_old(EMUFILE* is, ENUM_SSLOADPARAMS params)
{
//if(params==SSLOADPARAM_DUMMY && suppress_scan_chunks)
// return 1;
int x;
uint8 header[16];
int stateversion;
char* fn=0;
////Make temporary savestate in case something screws up during the load
//if(params == SSLOADPARAM_BACKUP)
//{
// fn=FCEU_MakeFName(FCEUMKF_NPTEMP,0,0);
// FILE *fp;
//
// if((fp=fopen(fn,"wb")))
// {
// if(FCEUSS_SaveFP(fp))
// {
// fclose(fp);
// }
// else
// {
// fclose(fp);
// unlink(fn);
// free(fn);
// fn=0;
// }
// }
//}
//if(params!=SSLOADPARAM_DUMMY)
{
FCEUMOV_PreLoad();
}
is->fread((char*)&header,16);
if(memcmp(header,"FCS",3))
{
return(0);
}
if(header[3] == 0xFF)
{
stateversion = FCEU_de32lsb(header + 8);
}
else
{
stateversion=header[3] * 100;
}
//if(params == SSLOADPARAM_DUMMY)
//{
// scan_chunks=1;
//}
x=ReadStateChunks(is,*(uint32*)(header+4));
//if(params == SSLOADPARAM_DUMMY)
//{
// scan_chunks=0;
// return 1;
//}
if(read_sfcpuc && stateversion<9500)
{
X.IRQlow=0;
}
if(GameStateRestore)
{
GameStateRestore(stateversion);
}
if(x)
{
FCEUPPU_LoadState(stateversion);
FCEUSND_LoadState(stateversion);
x=FCEUMOV_PostLoad();
}
if(fn)
{
//if(!x || params == SSLOADPARAM_DUMMY) //is make_backup==2 possible?? oh well.
//{
// * Oops! Load the temporary savestate */
// FILE *fp;
//
// if((fp=fopen(fn,"rb")))
// {
// FCEUSS_LoadFP(fp,SSLOADPARAM_NOBACKUP);
// fclose(fp);
// }
// unlink(fn);
//}
free(fn);
}
return(x);
}
bool FCEUSS_LoadFP(EMUFILE* is, ENUM_SSLOADPARAMS params)
{
if(!is) return false;
//maybe make a backup savestate
bool backup = (params == SSLOADPARAM_BACKUP);
EMUFILE_MEMORY msBackupSavestate;
if(backup)
{
FCEUSS_SaveMS(&msBackupSavestate,Z_NO_COMPRESSION);
}
uint8 header[16];
//read and analyze the header
is->fread((char*)&header,16);
if(memcmp(header,"FCSX",4)) {
//its not an fceux save file.. perhaps it is an fceu savefile
is->fseek(0,SEEK_SET);
FCEU_state_loading_old_format = true;
bool ret = FCEUSS_LoadFP_old(is,params)!=0;
FCEU_state_loading_old_format = false;
if(!ret && backup) FCEUSS_LoadFP(&msBackupSavestate,SSLOADPARAM_NOBACKUP);
return ret;
}
size_t totalsize = FCEU_de32lsb(header + 4);
int stateversion = FCEU_de32lsb(header + 8);
uint32_t comprlen = FCEU_de32lsb(header + 12);
// reinit memory_savestate
// memory_savestate is global variable which already has its vector of bytes, so no need to allocate memory every time we use save/loadstate
if ((memory_savestate.get_vec())->size() < totalsize)
(memory_savestate.get_vec())->resize(totalsize);
memory_savestate.set_len(totalsize);
memory_savestate.unfail();
memory_savestate.fseek(0, SEEK_SET);
if(comprlen != ~0u)
{
// the savestate is compressed: read from is to compressed_buf, then decompress from compressed_buf to memory_savestate.vec
if (compressed_buf.size() < comprlen) compressed_buf.resize(comprlen);
is->fread(&compressed_buf[0], comprlen);
uLongf uncomprlen = totalsize;
int error = uncompress(memory_savestate.buf(), &uncomprlen, &compressed_buf[0], comprlen);
if(error != Z_OK || uncomprlen != totalsize)
return false; // we dont need to restore the backup here because we havent messed with the emulator state yet
} else
{
// the savestate is not compressed: just read from is to memory_savestate.vec
is->fread(memory_savestate.buf(), totalsize);
}
FCEUMOV_PreLoad();
bool x = (ReadStateChunks(&memory_savestate, totalsize) != 0);
//mbg 5/24/08 - we don't support old states, so this shouldnt matter.
//if(read_sfcpuc && stateversion<9500)
// X.IRQlow=0;
if(GameStateRestore)
{
GameStateRestore(stateversion);
}
if (x)
{
FCEUPPU_LoadState(stateversion);
FCEUSND_LoadState(stateversion);
x=FCEUMOV_PostLoad();
} else if (backup)
{
msBackupSavestate.fseek(0,SEEK_SET);
FCEUSS_LoadFP(&msBackupSavestate,SSLOADPARAM_NOBACKUP);
}
return x;
}
bool FCEUSS_Load(const char *fname, bool display_message)
{
fceuScopedPtr <EMUFILE> st; // fceuScopedPtr will auto delete the allocated EMUFILE at function return.
std::string fn;
//mbg movie - this needs to be overhauled
////this fixes read-only toggle problems
//if(FCEUMOV_IsRecording()) {
// FCEUMOV_AddCommand(0);
// MovieFlushHeader();
//}
if (geniestage == 1)
{
if (display_message)
FCEU_DispMessage("Cannot load FCS in GG screen.",0);
return false;
}
if (fname)
{
st = FCEUD_UTF8_fstream(fname, "rb");
fn.assign(fname);
}
else
{
fn = FCEU_MakeFName(FCEUMKF_STATE,CurrentState,fname);
st=FCEUD_UTF8_fstream(fn.c_str(),"rb");
lastLoadstateMade.assign(fn);
}
if (st.get() == NULL || (st.get()->get_fp() == NULL))
{
if (display_message)
{
FCEU_DispMessage("State %d load error.", 0, CurrentState);
//FCEU_DispMessage("State %d load error. Filename: %s", 0, CurrentState, fn.c_str());
}
SaveStateStatus[CurrentState] = 0;
return false;
}
//If in bot mode, don't do a backup when loading.
//Otherwise you eat at the hard disk, since so many
//states are being loaded.
if (FCEUSS_LoadFP(st.get(), backupSavestates ? SSLOADPARAM_BACKUP : SSLOADPARAM_NOBACKUP))
{
if (fname)
{
char szFilename[260]={0};
splitpath(fname, 0, 0, szFilename, 0);
if (display_message)
{
FCEU_DispMessage("State %s loaded.", 0, szFilename);
//FCEU_DispMessage("State %s loaded. Filename: %s", 0, szFilename, fn.c_str());
}
}
else
{
if (display_message)
{
FCEU_DispMessage("State %d loaded.", 0, CurrentState);
//FCEU_DispMessage("State %d loaded. Filename: %s", 0, CurrentState, fn.c_str());
}
SaveStateStatus[CurrentState] = 1;
}
#ifdef _S9XLUA_H
if (!internalSaveLoad)
{
LuaSaveData saveData;
std::string luaSaveFilename;
luaSaveFilename.assign(fn.c_str());
luaSaveFilename.append(".luasav");
FILE* luaSaveFile = fopen(luaSaveFilename.c_str(), "rb");
if(luaSaveFile)
{
saveData.ImportRecords(luaSaveFile);
fclose(luaSaveFile);
}
CallRegisteredLuaLoadFunctions(CurrentState, saveData);
}
#endif
#ifdef __WIN_DRIVER__
Update_RAM_Search(); // Update_RAM_Watch() is also called.
#endif
//Update input display if movie is loaded
extern uint32 cur_input_display;
extern uint8 FCEU_GetJoyJoy(void);
cur_input_display = FCEU_GetJoyJoy(); //Input display should show the last buttons pressed (stored in the savestate)
return true;
}
else
{
if(!fname)
SaveStateStatus[CurrentState] = 1;
if (display_message)
{
FCEU_DispMessage("Error(s) reading state %d!", 0, CurrentState);
//FCEU_DispMessage("Error(s) reading state %d! Filename: %s", 0, CurrentState, fn);
}
return 0;
}
}
void FCEUSS_CheckStates(void)
{
FILE *st=NULL;
int ssel;
for(ssel=0;ssel<10;ssel++)
{
st=FCEUD_UTF8fopen(FCEU_MakeFName(FCEUMKF_STATE,ssel,0),"rb");
if(st)
{
SaveStateStatus[ssel]=1;
fclose(st);
}
else
SaveStateStatus[ssel]=0;
}
CurrentState=1;
StateShow=0;
}
void ResetExState(void (*PreSave)(void), void (*PostSave)(void))
{
int x;
for(x=0;x<SFEXINDEX;x++)
{
if(SFMDATA[x].desc)
FCEU_free( (void*)SFMDATA[x].desc);
}
// adelikat, 3/14/09: had to add this to clear out the size parameter. NROM(mapper 0) games were having savestate crashes if loaded after a non NROM game because the size variable was carrying over and causing savestates to save too much data
SFMDATA[0].s = 0;
SPreSave = PreSave;
SPostSave = PostSave;
SFEXINDEX=0;
}
void AddExState(void *v, uint32 s, int type, const char *desc)
{
//do not accept extra state information if a null pointer was provided for v, so list won't terminate early
if (v == 0) return;
if(s==~0u)
{
SFORMAT* sf = (SFORMAT*)v;
std::map<std::string,bool> names;
while(sf->v)
{
char tmp[5] = {0};
memcpy(tmp,sf->desc,4);
std::string desc = tmp;
if(names.find(desc) != names.end())
{
#ifdef __WIN_DRIVER__
MessageBox(NULL,"OH NO!!! YOU HAVE AN INVALID SFORMAT! POST A BUG TICKET ALONG WITH INFO ON THE ROM YOURE USING\n","OOPS",MB_OK);
#else
printf("OH NO!!! YOU HAVE AN INVALID SFORMAT! POST A BUG TICKET ALONG WITH INFO ON THE ROM YOURE USING\n");
#endif
exit(0);
}
names[desc] = true;
sf++;
}
}
if(desc)
{
SFMDATA[SFEXINDEX].desc=(const char *)FCEU_malloc(strlen(desc)+1);
strcpy( (char*)SFMDATA[SFEXINDEX].desc,desc);
}
else
SFMDATA[SFEXINDEX].desc=0;
SFMDATA[SFEXINDEX].v=v;
SFMDATA[SFEXINDEX].s=s;
if(type) SFMDATA[SFEXINDEX].s|=RLSB;
if(SFEXINDEX<SFMDATA_SIZE-1)
SFEXINDEX++;
else
{
static int once=1;
if(once)
{
once=0;
FCEU_PrintError("Error in AddExState: SFEXINDEX overflow.\nSomebody made SFMDATA_SIZE too small.");
}
}
SFMDATA[SFEXINDEX].v=0; // End marker.
}
void FCEUI_SelectStateNext(int n)
{
if(n>0)
CurrentState=(CurrentState+1)%10;
else
CurrentState=(CurrentState+9)%10;
FCEUI_SelectState(CurrentState, 1);
}
int FCEUI_SelectState(int w, int show)
{
int oldstate=CurrentState;
FCEUSS_CheckStates();
if(w == -1) { StateShow = 0; return 0; } //mbg merge 7/17/06 had to make return a value
CurrentState=w;
if(show)
{
StateShow=180;
FCEU_DispMessage("-select state-",0);
}
return oldstate;
}
void FCEUI_SaveState(const char *fname, bool display_message)
{
if(!FCEU_IsValidUI(FCEUI_SAVESTATE)) return;
StateShow = 0;
FCEUSS_Save(fname, display_message);
}
int loadStateFailed = 0; // hack, this function should return a value instead
bool file_exists(const char * filename)
{
if (FILE * file = fopen(filename, "r")) //I'm sure, you meant for READING =)
{
fclose(file);
return true;
}
return false;
}
void FCEUI_LoadState(const char *fname, bool display_message)
{
if(!FCEU_IsValidUI(FCEUI_LOADSTATE)) return;
StateShow = 0;
loadStateFailed = 0;
/* For network play, be load the state locally, and then save the state to a temporary file,
and send that. This insures that if an older state is loaded that is missing some
information expected in newer save states, desynchronization won't occur(at least not
from this ;)).
*/
if (backupSavestates)
BackupLoadState(); // If allowed, backup the current state before loading a new one
if (!movie_readonly && autoMovieBackup && freshMovie) //If auto-backup is on, movie has not been altered this session and the movie is in read+write mode
{
FCEUI_MakeBackupMovie(false); //Backup the movie before the contents get altered, but do not display messages
}
if (fname != NULL && !file_exists(fname))
{
loadStateFailed = 1;
return; // state doesn't exist; exit cleanly
}
if (FCEUSS_Load(fname, display_message))
{
//in case we're loading a savestate made with old ppu, we need to make sure ppur's regs used for dividing are ready to go
newppu_hacky_emergency_reset();
//mbg todo netplay
#if 0
if(FCEUnetplay)
{