[fceu.git] / state.c

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2002 Ben Parnell
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*  TODO: Add (better) file io error checking */
/*  TODO: Change save state file format. */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef GP2X
#include <unistd.h>
#endif

#include "types.h"
#include "x6502.h"
#include "version.h"
#include "fce.h"
#include "sound.h"
#define INESPRIV                // Take this out when old save state support is removed in a future version.
#include "ines.h"
#include "svga.h"
#include "endian.h"
#include "fds.h"
#include "general.h"
#include "state.h"
#include "memory.h"
#include "ppu.h"

static void (*SPreSave)(void) = 0;
static void (*SPostSave)(void) = 0;

#define SFMDATA_SIZE (64)
static SFORMAT SFMDATA[SFMDATA_SIZE];
static int SFEXINDEX;
static int stateversion;

extern SFORMAT FCEUPPU_STATEINFO[];  // 3
extern SFORMAT FCEUCTRL_STATEINFO[]; // 4

SFORMAT SFCPU[]={ // 1
 { &X.PC, 2|RLSB, "PC\0"},
 { &X.A, 1, "A\0\0"},
 { &X.P, 1, "P\0\0"},
 { &X.X, 1, "X\0\0"},
 { &X.Y, 1, "Y\0\0"},
 { &X.S, 1, "S\0\0"},
 { RAM, 0x800, "RAM"},
 { 0, }
};

SFORMAT SFCPUC[]={ // 2
 { &X.jammed, 1, "JAMM"},
 { &X.IRQlow, 1, "IRQL"},
 { &X.tcount, 4|RLSB, "ICoa"},
 { &X.count,  4|RLSB, "ICou"},
 { &timestamp, 4|RLSB, "TIME"},
 { &timestampbase, 8|RLSB, "TMEB"},
 // from 0.98.15
 { &timestampbase, sizeof(timestampbase) | RLSB, "TSBS"}, // size seems to match?
 { &X.mooPI, 1, "MooP"}, // alternative to the "quick and dirty hack"
 // TODO: IQLB?
 { 0, }
};

extern uint16 TempAddrT,RefreshAddrT;


SFORMAT SFSND[]={
 { &fhcnt, 4|RLSB,"FHCN"},
 { &fcnt, 1, "FCNT"},
 { PSG, 14, "PSG"},
 { &PSG[0x15], 1, "P15"},
 { &PSG[0x17], 1, "P17"},
 { decvolume, 3, "DECV"},
 { &sqnon, 1, "SQNO"},
 { &nreg, 2|RLSB, "NREG"},
 { &trimode, 1, "TRIM"},
 { &tricoop, 1, "TRIC"},
 { sweepon, 2, "SWEE"},
 { &curfreq[0], 4|RLSB,"CRF1"},
 { &curfreq[1], 4|RLSB,"CRF2"},
 { SweepCount, 2,"SWCT"},
 { DecCountTo1, 3,"DCT1"},
 { &PCMBitIndex, 1,"PBIN"},
 { &PCMAddressIndex, 4|RLSB, "PAIN"},
 { &PCMSizeIndex, 4|RLSB, "PSIN"},
 { 0, }
};


int WriteStateChunk(FILE *st, int type, SFORMAT *sf)
{
 int bsize, count;
 int x;

 count = x = 0;
 while (sf[x++].v) count++;

 fputc(type,st);

 for(x=bsize=0;x<count;x++)
  bsize+=sf[x].s&(~RLSB);
 bsize+=count<<3;
 write32(bsize,st);
 for(x=0;x<count;x++)
 {
  fwrite(sf[x].desc,1,4,st);
  write32(sf[x].s&(~RLSB),st);
  #ifdef LSB_FIRST
  fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
  #else
  {
  int z;
  if(sf[x].s&RLSB)
  {
   for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
   {
    fputc(*(uint8*)sf[x].v,st);
   }
  }
  else
   fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
  }
  #endif
 }
 return (bsize+5);
}

int ReadStateChunk(FILE *st, SFORMAT *sf, int size)
{
 uint8 tmpyo[16];
 int bsize, count;
 int x;

 // recalculate count ourselves
 count = x = 0;
 while (sf[x++].v) count++;

 for(x=bsize=0;x<count;x++)
  bsize+=sf[x].s&(~RLSB);
 if(stateversion>=53)
  bsize+=count<<3;
 else
 {
  if(bsize!=size)
  {
   fseek(st,size,SEEK_CUR);
   return 0;
  }
 }

 if(stateversion<56)
  memcpy(tmpyo,mapbyte3,16);

 if(stateversion>=53)
 {
  int temp;
  temp=ftell(st);

  while(ftell(st)<temp+size)
  {
   int tsize;
   char toa[4];

   if(fread(toa,1,4,st)<=0)
    return 0;
   read32(&tsize,st);

   for(x=0;x<count;x++)
   {
    if(!memcmp(toa,sf[x].desc,4))
    {
     if(tsize!=(sf[x].s&(~RLSB)))
     {
      printf("ReadStateChunk: sect \"%c%c%c%c\" has wrong size\n", toa[0], toa[1], toa[2], toa[3]);
      goto nkayo;
     }
     #ifndef LSB_FIRST
     if(sf[x].s&RLSB)
     {
      int z;
       for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
        *(uint8*)sf[x].v=fgetc(st);
     }
     else
     #endif
     {
       fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
     }
     goto bloo;
    }
   }
  printf("ReadStateChunk: sect \"%c%c%c%c\" not handled\n", toa[0], toa[1], toa[2], toa[3]);
  nkayo:
  fseek(st,tsize,SEEK_CUR);
  bloo:;
  } // while(...)
 }  // >=53
 else
 {
  for(x=0;x<count;x++)
  {
   #ifdef LSB_FIRST
   fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
   #else
   int z;
   if(sf[x].s&RLSB)
    for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
    {
     *(uint8*)sf[x].v=fgetc(st);
    }
   else
    fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
   #endif
  }
 }
 if(stateversion<56)
 {
  for(x=0;x<16;x++)
   #ifdef LSB_FIRST
   mapbyte1[x]=mapbyte1[x<<1];
   #else
   mapbyte1[x]=mapbyte1[(x<<1)+1];
   #endif
  memcpy(mapbyte3,tmpyo,16);
 }
 return 1;
}

static int ReadStateChunks(FILE *st)
{
 int t;
 uint32 size;
 int ret=1;

for(;;)
 {
  t=fgetc(st);
  if(t==EOF) break;
  if(!read32(&size,st)) break;

  // printf("ReadStateChunks: chunk %i\n", t);
  switch(t)
  {
   case 1:if(!ReadStateChunk(st,SFCPU,size)) ret=0;
#ifdef ASM_6502
          asmcpu_unpack();
#endif
	  break;
   case 2:if(!ReadStateChunk(st,SFCPUC,size)) ret=0;
          else
	  {
	   X.mooPI=X.P;	// Quick and dirty hack.
	  }
	  break;
   case 3:if(!ReadStateChunk(st,FCEUPPU_STATEINFO,size)) ret=0;break;
   case 4:if(!ReadStateChunk(st,FCEUCTRL_STATEINFO,size)) ret=0;break;
   case 5:if(!ReadStateChunk(st,SFSND,size)) ret=0;break;
   case 0x10:if(!ReadStateChunk(st,SFMDATA,size)) ret=0;break;
   default:printf("ReadStateChunks: unknown chunk: %i\n", t);
           if(fseek(st,size,SEEK_CUR)<0) goto endo;break;
  }
 }
 endo:
 return ret;
}


int CurrentState=0;
extern int geniestage;
void SaveState(void)
{
	FILE *st=NULL;

	TempAddrT=TempAddr;
	RefreshAddrT=RefreshAddr;

	if(geniestage==1)
	{
	 FCEU_DispMessage("Cannot save FCS in GG screen.");
	 return;
        }

	 st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"wb");

	 if(st!=NULL)
	 {
	  static uint32 totalsize;
	  static uint8 header[16]="FCS";
	  memset(header+4,0,13);
	  header[3]=VERSION_NUMERIC;
	  fwrite(header,1,16,st);

#ifdef ASM_6502
          asmcpu_pack();
#endif
	  totalsize=WriteStateChunk(st,1,SFCPU);
	  totalsize+=WriteStateChunk(st,2,SFCPUC);
	  totalsize+=WriteStateChunk(st,3,FCEUPPU_STATEINFO);
	  totalsize+=WriteStateChunk(st,4,FCEUCTRL_STATEINFO);
	  totalsize+=WriteStateChunk(st,5,SFSND);


	  if(SPreSave) SPreSave();
	  totalsize+=WriteStateChunk(st,0x10,SFMDATA);
	  if(SPostSave) SPostSave();

	  fseek(st,4,SEEK_SET);
	  write32(totalsize,st);
	  SaveStateStatus[CurrentState]=1;
	  fclose(st);
#ifdef GP2X
	  sync();
#endif
	  FCEU_DispMessage("State %d saved.",CurrentState);
	 }
	 else
	  FCEU_DispMessage("State %d save error.",CurrentState);
}

static int LoadStateOld(FILE *st);
int FCEUSS_LoadFP(FILE *st, int make_backup)
{
	int x;
	if(st!=NULL)
	{
	 uint8 header[16];

         fread(&header,1,16,st);
         if(memcmp(header,"FCS",3))
         {
          fseek(st,0,SEEK_SET);
          if(!LoadStateOld(st))
           goto lerror;
          goto okload;
         }
         stateversion=header[3];
	 if(stateversion<53)
	 FixOldSaveStateSFreq();
	 x=ReadStateChunks(st);
	 if(GameStateRestore) GameStateRestore(header[3]);
	 if(x)
	 {
	  okload:
          TempAddr=TempAddrT;
          RefreshAddr=RefreshAddrT;

	  SaveStateStatus[CurrentState]=1;
	  FCEU_DispMessage("State %d loaded.",CurrentState);
	  SaveStateStatus[CurrentState]=1;
	 }
	 else
	 {
	  SaveStateStatus[CurrentState]=1;
	  FCEU_DispMessage("Error(s) reading state %d!",CurrentState);
	 }
	}
	else
	{
	 lerror:
	 FCEU_DispMessage("State %d load error.",CurrentState);
	 SaveStateStatus[CurrentState]=0;
	 return 0;
	}
	return 1;
}

void LoadState(void)
{
	FILE *st=NULL;

        if(geniestage==1)
        {
         FCEU_DispMessage("Cannot load FCS in GG screen.");
         return;
        }

	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"rb");
	if (st)
	{
	 FCEUSS_LoadFP(st, 0);
	 fclose(st);
	}
}

char SaveStateStatus[10];
void CheckStates(void)
{
	FILE *st=NULL;
	int ssel;

	if(SaveStateStatus[0]==(char)-1)
 	 for(ssel=0;ssel<10;ssel++)
	 {
	  st=fopen(FCEU_MakeFName(FCEUMKF_STATE,ssel,0),"rb");
          if(st)
          {
           SaveStateStatus[ssel]=1;
           fclose(st);
          }
          else
           SaveStateStatus[ssel]=0;
	 }
}

void SaveStateRefresh(void)
{
 SaveStateStatus[0]=-1;
}

void ResetExState(void (*PreSave)(void), void (*PostSave)(void))
{
 int x;
 for(x=0;x<SFEXINDEX;x++)
 {
  if(SFMDATA[x].desc)
   free(SFMDATA[x].desc);
 }
 SPreSave = PreSave;
 SPostSave = PostSave;
 SFEXINDEX=0;
}


void AddExState(void *v, uint32 s, int type, char *desc)
{
 if(desc)
 {
  SFMDATA[SFEXINDEX].desc=(char *)FCEU_malloc(5);
  strcpy(SFMDATA[SFEXINDEX].desc,desc);
 }
 else
//  SFMDATA[SFEXINDEX].desc=0;
  return; // do not support recursive save structures
 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.
}


/* Old state loading code follows */

uint8 *StateBuffer;
unsigned int intostate;

static void afread(void *ptr, size_t _size, size_t _nelem)
{
	memcpy(ptr,StateBuffer+intostate,_size*_nelem);
	intostate+=_size*_nelem;
}


static void areadlower8of16(int8 *d)
{
#ifdef LSB_FIRST
	*d=StateBuffer[intostate++];
#else
	d[1]=StateBuffer[intostate++];
#endif
}


static void areadupper8of16(int8 *d)
{
#ifdef LSB_FIRST
	d[1]=StateBuffer[intostate++];
#else
	*d=StateBuffer[intostate++];
#endif
}


static void aread16(int8 *d)
{
#ifdef LSB_FIRST
	*d=StateBuffer[intostate++];
	d[1]=StateBuffer[intostate++];
#else
	d[1]=StateBuffer[intostate++];
	*d=StateBuffer[intostate++];
#endif
}


static void aread32(int8 *d)
{
#ifdef LSB_FIRST
	*d=StateBuffer[intostate++];
	d[1]=StateBuffer[intostate++];
	d[2]=StateBuffer[intostate++];
	d[3]=StateBuffer[intostate++];
#else
	d[3]=StateBuffer[intostate++];
	d[2]=StateBuffer[intostate++];
	d[1]=StateBuffer[intostate++];
	*d=StateBuffer[intostate++];
#endif
}

static int LoadStateOld(FILE *st)
{
	int x;
	int32 nada;
        uint8 version;
	nada=0;

	printf("LoadStateOld\n");

	StateBuffer=FCEU_malloc(59999);
	if(StateBuffer==NULL)
         return 0;
        if(!fread(StateBuffer,59999,1,st))
        {
            fclose(st);
            free(StateBuffer);
            return 0;
        }

	intostate=0;

	{
	 uint8 a[2];
 	 afread(&a[0],1,1);
	 afread(&a[1],1,1);
	 X.PC=a[0]|(a[1]<<8);
	}
	afread(&X.A,1,1);
	afread(&X.P,1,1);
	afread(&X.X,1,1);
	afread(&X.Y,1,1);
	afread(&X.S,1,1);
	afread(&version,1,1);
	afread(&nada,1,1);
	afread(&nada,1,1);
	afread(&nada,1,1);
	afread(&nada,1,1);
	aread32((int8 *)&X.count);
	afread(&nada,1,1);
	afread(&nada,1,1);
	afread(&nada,1,1);
	afread(&nada,1,1);
	aread32((int8 *)&nada);
	afread(&nada,1,1);
	afread(&nada,1,1);
	afread(&nada,1,1);
	afread(&nada,1,1);

	for(x=0;x<8;x++)
		areadupper8of16((int8 *)&CHRBankList[x]);
	afread(PRGBankList,4,1);
	for(x=0;x<8;x++)
		areadlower8of16((int8 *)&CHRBankList[x]);
        afread(CHRRAM,1,0x2000);
        afread(NTARAM,1,0x400);
        afread(ExtraNTARAM,1,0x400);
        afread(NTARAM+0x400,1,0x400);
        afread(ExtraNTARAM+0x400,1,0x400);

        for(x=0;x<0xF00;x++)
         afread(&nada,1,1);
        afread(PALRAM,1,0x20);
        for(x=0;x<256-32;x++)
         afread(&nada,1,1);
        for(x=0x00;x<0x20;x++)
         PALRAM[x]&=0x3f;
	afread(PPU,1,4);
	afread(SPRAM,1,0x100);
	afread(WRAM,1,8192);
	afread(RAM,1,0x800);
	aread16((int8 *)&scanline);
	aread16((int8 *)&RefreshAddr);
	afread(&VRAMBuffer,1,1);

	afread(&IRQa,1,1);
	aread32((int8 *)&IRQCount);
	aread32((int8 *)&IRQLatch);
	afread(&Mirroring,1,1);
	afread(PSG,1,0x17);
	PSG[0x11]&=0x7F;
        afread(MapperExRAM,1,193);
        if(version>=31)
         PSG[0x17]=MapperExRAM[115];
        else
         PSG[0x17]|=0x40;
        PSG[0x15]&=0xF;
        sqnon=PSG[0x15];

        X.IRQlow=0;
        afread(&nada,1,1);
        afread(&nada,1,1);
        afread(&nada,1,1);
        afread(&nada,1,1);
        afread(&nada,1,1);
        afread(&nada,1,1);
	afread(&XOffset,1,1);
        PPUCHRRAM=0;
        for(x=0;x<8;x++)
        {
         nada=0;
         afread(&nada,1,1);
         PPUCHRRAM|=(nada?1:0)<<x;
        }

         afread(mapbyte1,1,8);
         afread(mapbyte2,1,8);
         afread(mapbyte3,1,8);
         afread(mapbyte4,1,8);
         for(x=0;x<4;x++)
          aread16((int8 *)&nada);

         PPUNTARAM=0;
         for(x=0;x<4;x++)
         {
          nada=0;
          aread16((int8 *)&nada);
          PPUNTARAM|=((nada&0x800)?0:1)<<x;
         }
         afread(MapperExRAM,1,32768);
         afread(&vtoggle,1,1);
         aread16((int8 *)&TempAddrT);
         aread16((int8 *)&RefreshAddrT);

         if(GameStateRestore) GameStateRestore(version);
         free(StateBuffer);
	 FixOldSaveStateSFreq();
	 X.mooPI=X.P;
         return 1;
}
Commit	Line	Data
c62d2810	1	/* FCE Ultra - NES/Famicom Emulator
	2	*
	3	* Copyright notice for this file:
	4	* Copyright (C) 2002 Ben Parnell
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
	21	/* TODO: Add (better) file io error checking */
	22	/* TODO: Change save state file format. */
	23
	24	#include <stdio.h>
	25	#include <stdlib.h>
	26	#include <string.h>
92e249b1	27	#ifdef GP2X
	28	#include <unistd.h>
	29	#endif
c62d2810	30
	31	#include "types.h"
	32	#include "x6502.h"
	33	#include "version.h"
	34	#include "fce.h"
	35	#include "sound.h"
	36	#define INESPRIV // Take this out when old save state support is removed in a future version.
	37	#include "ines.h"
	38	#include "svga.h"
	39	#include "endian.h"
	40	#include "fds.h"
	41	#include "general.h"
	42	#include "state.h"
	43	#include "memory.h"
5232c20c	44	#include "ppu.h"
c62d2810	45
d97315ac	46	static void (*SPreSave)(void) = 0;
	47	static void (*SPostSave)(void) = 0;
	48
	49	#define SFMDATA_SIZE (64)
	50	static SFORMAT SFMDATA[SFMDATA_SIZE];
c62d2810	51	static int SFEXINDEX;
	52	static int stateversion;
	53
890e37ba	54	extern SFORMAT FCEUPPU_STATEINFO[]; // 3
890e37ba	55	extern SFORMAT FCEUCTRL_STATEINFO[]; // 4
c62d2810	56
890e37ba	57	SFORMAT SFCPU[]={ // 1
c62d2810	58	{ &X.PC, 2\|RLSB, "PC\0"},
	59	{ &X.A, 1, "A\0\0"},
	60	{ &X.P, 1, "P\0\0"},
	61	{ &X.X, 1, "X\0\0"},
	62	{ &X.Y, 1, "Y\0\0"},
	63	{ &X.S, 1, "S\0\0"},
890e37ba	64	{ RAM, 0x800, "RAM"},
890e37ba	65	{ 0, }
c62d2810	66	};
c62d2810	67
890e37ba	68	SFORMAT SFCPUC[]={ // 2
c62d2810	69	{ &X.jammed, 1, "JAMM"},
	70	{ &X.IRQlow, 1, "IRQL"},
	71	{ &X.tcount, 4\|RLSB, "ICoa"},
	72	{ &X.count, 4\|RLSB, "ICou"},
	73	{ &timestamp, 4\|RLSB, "TIME"},
890e37ba	74	{ &timestampbase, 8\|RLSB, "TMEB"},
	75	// from 0.98.15
	76	{ &timestampbase, sizeof(timestampbase) \| RLSB, "TSBS"}, // size seems to match?
	77	{ &X.mooPI, 1, "MooP"}, // alternative to the "quick and dirty hack"
	78	// TODO: IQLB?
	79	{ 0, }
c62d2810	80	};
c62d2810	81
890e37ba	82	extern uint16 TempAddrT,RefreshAddrT;
c62d2810	83
c62d2810	84
890e37ba	85	SFORMAT SFSND[]={
c62d2810	86	{ &fhcnt, 4\|RLSB,"FHCN"},
	87	{ &fcnt, 1, "FCNT"},
	88	{ PSG, 14, "PSG"},
	89	{ &PSG[0x15], 1, "P15"},
	90	{ &PSG[0x17], 1, "P17"},
	91	{ decvolume, 3, "DECV"},
	92	{ &sqnon, 1, "SQNO"},
	93	{ &nreg, 2\|RLSB, "NREG"},
	94	{ &trimode, 1, "TRIM"},
	95	{ &tricoop, 1, "TRIC"},
	96	{ sweepon, 2, "SWEE"},
	97	{ &curfreq[0], 4\|RLSB,"CRF1"},
	98	{ &curfreq[1], 4\|RLSB,"CRF2"},
	99	{ SweepCount, 2,"SWCT"},
	100	{ DecCountTo1, 3,"DCT1"},
	101	{ &PCMBitIndex, 1,"PBIN"},
	102	{ &PCMAddressIndex, 4\|RLSB, "PAIN"},
890e37ba	103	{ &PCMSizeIndex, 4\|RLSB, "PSIN"},
890e37ba	104	{ 0, }
c62d2810	105	};
	106
	107
890e37ba	108
890e37ba	109	int WriteStateChunk(FILE st, int type, SFORMAT sf)
c62d2810	110	{
890e37ba	111	int bsize, count;
c62d2810	112	int x;
c62d2810	113
890e37ba	114	count = x = 0;
	115	while (sf[x++].v) count++;
	116
c62d2810	117	fputc(type,st);
22f08d95	118
c62d2810	119	for(x=bsize=0;x<count;x++)
	120	bsize+=sf[x].s&(~RLSB);
	121	bsize+=count<<3;
	122	write32(bsize,st);
	123	for(x=0;x<count;x++)
	124	{
	125	fwrite(sf[x].desc,1,4,st);
	126	write32(sf[x].s&(~RLSB),st);
	127	#ifdef LSB_FIRST
	128	fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
	129	#else
	130	{
	131	int z;
	132	if(sf[x].s&RLSB)
	133	{
	134	for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
	135	{
	136	fputc((uint8)sf[x].v,st);
	137	}
	138	}
	139	else
	140	fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
	141	}
	142	#endif
	143	}
	144	return (bsize+5);
	145	}
	146
890e37ba	147	int ReadStateChunk(FILE st, SFORMAT sf, int size)
c62d2810	148	{
c62d2810	149	uint8 tmpyo[16];
890e37ba	150	int bsize, count;
c62d2810	151	int x;
c62d2810	152
890e37ba	153	// recalculate count ourselves
	154	count = x = 0;
	155	while (sf[x++].v) count++;
	156
c62d2810	157	for(x=bsize=0;x<count;x++)
	158	bsize+=sf[x].s&(~RLSB);
	159	if(stateversion>=53)
	160	bsize+=count<<3;
	161	else
	162	{
	163	if(bsize!=size)
	164	{
	165	fseek(st,size,SEEK_CUR);
	166	return 0;
	167	}
	168	}
	169
	170	if(stateversion<56)
	171	memcpy(tmpyo,mapbyte3,16);
	172
	173	if(stateversion>=53)
	174	{
	175	int temp;
	176	temp=ftell(st);
	177
	178	while(ftell(st)<temp+size)
	179	{
	180	int tsize;
	181	char toa[4];
	182
	183	if(fread(toa,1,4,st)<=0)
	184	return 0;
	185	read32(&tsize,st);
	186
	187	for(x=0;x<count;x++)
	188	{
	189	if(!memcmp(toa,sf[x].desc,4))
	190	{
	191	if(tsize!=(sf[x].s&(~RLSB)))
890e37ba	192	{
890e37ba	193	printf("ReadStateChunk: sect \"%c%c%c%c\" has wrong size\n", toa[0], toa[1], toa[2], toa[3]);
c62d2810	194	goto nkayo;
890e37ba	195	}
c62d2810	196	#ifndef LSB_FIRST
	197	if(sf[x].s&RLSB)
	198	{
	199	int z;
22f08d95	200	for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
c62d2810	201	(uint8)sf[x].v=fgetc(st);
	202	}
	203	else
	204	#endif
	205	{
	206	fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
	207	}
	208	goto bloo;
	209	}
	210	}
890e37ba	211	printf("ReadStateChunk: sect \"%c%c%c%c\" not handled\n", toa[0], toa[1], toa[2], toa[3]);
c62d2810	212	nkayo:
	213	fseek(st,tsize,SEEK_CUR);
	214	bloo:;
	215	} // while(...)
	216	} // >=53
	217	else
	218	{
	219	for(x=0;x<count;x++)
	220	{
	221	#ifdef LSB_FIRST
	222	fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
	223	#else
	224	int z;
	225	if(sf[x].s&RLSB)
	226	for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
	227	{
	228	(uint8)sf[x].v=fgetc(st);
	229	}
	230	else
	231	fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
	232	#endif
	233	}
	234	}
	235	if(stateversion<56)
	236	{
	237	for(x=0;x<16;x++)
	238	#ifdef LSB_FIRST
	239	mapbyte1[x]=mapbyte1[x<<1];
	240	#else
	241	mapbyte1[x]=mapbyte1[(x<<1)+1];
	242	#endif
	243	memcpy(mapbyte3,tmpyo,16);
	244	}
	245	return 1;
	246	}
	247
890e37ba	248	static int ReadStateChunks(FILE *st)
c62d2810	249	{
	250	int t;
	251	uint32 size;
	252	int ret=1;
	253
	254	for(;;)
	255	{
	256	t=fgetc(st);
	257	if(t==EOF) break;
	258	if(!read32(&size,st)) break;
890e37ba	259
890e37ba	260	// printf("ReadStateChunks: chunk %i\n", t);
c62d2810	261	switch(t)
c62d2810	262	{
890e37ba	263	case 1:if(!ReadStateChunk(st,SFCPU,size)) ret=0;
92e249b1	264	#ifdef ASM_6502
	265	asmcpu_unpack();
	266	#endif
	267	break;
890e37ba	268	case 2:if(!ReadStateChunk(st,SFCPUC,size)) ret=0;
c62d2810	269	else
	270	{
	271	X.mooPI=X.P; // Quick and dirty hack.
	272	}
	273	break;
890e37ba	274	case 3:if(!ReadStateChunk(st,FCEUPPU_STATEINFO,size)) ret=0;break;
	275	case 4:if(!ReadStateChunk(st,FCEUCTRL_STATEINFO,size)) ret=0;break;
	276	case 5:if(!ReadStateChunk(st,SFSND,size)) ret=0;break;
	277	case 0x10:if(!ReadStateChunk(st,SFMDATA,size)) ret=0;break;
	278	default:printf("ReadStateChunks: unknown chunk: %i\n", t);
	279	if(fseek(st,size,SEEK_CUR)<0) goto endo;break;
c62d2810	280	}
	281	}
	282	endo:
	283	return ret;
	284	}
	285
	286
	287	int CurrentState=0;
	288	extern int geniestage;
	289	void SaveState(void)
	290	{
	291	FILE *st=NULL;
	292
	293	TempAddrT=TempAddr;
	294	RefreshAddrT=RefreshAddr;
	295
	296	if(geniestage==1)
	297	{
	298	FCEU_DispMessage("Cannot save FCS in GG screen.");
	299	return;
	300	}
	301
	302	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"wb");
	303
	304	if(st!=NULL)
	305	{
	306	static uint32 totalsize;
	307	static uint8 header[16]="FCS";
	308	memset(header+4,0,13);
	309	header[3]=VERSION_NUMERIC;
	310	fwrite(header,1,16,st);
	311
92e249b1	312	#ifdef ASM_6502
	313	asmcpu_pack();
	314	#endif
890e37ba	315	totalsize=WriteStateChunk(st,1,SFCPU);
	316	totalsize+=WriteStateChunk(st,2,SFCPUC);
	317	totalsize+=WriteStateChunk(st,3,FCEUPPU_STATEINFO);
	318	totalsize+=WriteStateChunk(st,4,FCEUCTRL_STATEINFO);
	319	totalsize+=WriteStateChunk(st,5,SFSND);
d97315ac	320
	321
	322	if(SPreSave) SPreSave();
890e37ba	323	totalsize+=WriteStateChunk(st,0x10,SFMDATA);
d97315ac	324	if(SPostSave) SPostSave();
22f08d95	325
c62d2810	326	fseek(st,4,SEEK_SET);
	327	write32(totalsize,st);
	328	SaveStateStatus[CurrentState]=1;
	329	fclose(st);
92e249b1	330	#ifdef GP2X
	331	sync();
	332	#endif
c62d2810	333	FCEU_DispMessage("State %d saved.",CurrentState);
	334	}
	335	else
	336	FCEU_DispMessage("State %d save error.",CurrentState);
	337	}
	338
	339	static int LoadStateOld(FILE *st);
5a2aa426	340	int FCEUSS_LoadFP(FILE *st, int make_backup)
c62d2810	341	{
c62d2810	342	int x;
c62d2810	343	if(st!=NULL)
	344	{
	345	uint8 header[16];
	346
	347	fread(&header,1,16,st);
	348	if(memcmp(header,"FCS",3))
	349	{
22f08d95	350	fseek(st,0,SEEK_SET);
c62d2810	351	if(!LoadStateOld(st))
	352	goto lerror;
	353	goto okload;
	354	}
	355	stateversion=header[3];
	356	if(stateversion<53)
	357	FixOldSaveStateSFreq();
	358	x=ReadStateChunks(st);
	359	if(GameStateRestore) GameStateRestore(header[3]);
	360	if(x)
	361	{
	362	okload:
	363	TempAddr=TempAddrT;
	364	RefreshAddr=RefreshAddrT;
	365
	366	SaveStateStatus[CurrentState]=1;
	367	FCEU_DispMessage("State %d loaded.",CurrentState);
	368	SaveStateStatus[CurrentState]=1;
	369	}
	370	else
	371	{
	372	SaveStateStatus[CurrentState]=1;
	373	FCEU_DispMessage("Error(s) reading state %d!",CurrentState);
	374	}
	375	}
	376	else
	377	{
	378	lerror:
	379	FCEU_DispMessage("State %d load error.",CurrentState);
	380	SaveStateStatus[CurrentState]=0;
5a2aa426	381	return 0;
	382	}
	383	return 1;
	384	}
	385
	386	void LoadState(void)
	387	{
	388	FILE *st=NULL;
	389
	390	if(geniestage==1)
	391	{
	392	FCEU_DispMessage("Cannot load FCS in GG screen.");
	393	return;
	394	}
	395
	396	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"rb");
	397	if (st)
	398	{
	399	FCEUSS_LoadFP(st, 0);
	400	fclose(st);
c62d2810	401	}
c62d2810	402	}
	403
	404	char SaveStateStatus[10];
	405	void CheckStates(void)
	406	{
	407	FILE *st=NULL;
	408	int ssel;
	409
22f08d95	410	if(SaveStateStatus[0]==(char)-1)
c62d2810	411	for(ssel=0;ssel<10;ssel++)
	412	{
	413	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,ssel,0),"rb");
	414	if(st)
	415	{
	416	SaveStateStatus[ssel]=1;
	417	fclose(st);
	418	}
	419	else
	420	SaveStateStatus[ssel]=0;
	421	}
	422	}
	423
	424	void SaveStateRefresh(void)
	425	{
	426	SaveStateStatus[0]=-1;
	427	}
	428
d97315ac	429	void ResetExState(void (PreSave)(void), void (PostSave)(void))
c62d2810	430	{
	431	int x;
	432	for(x=0;x<SFEXINDEX;x++)
d97315ac	433	{
	434	if(SFMDATA[x].desc)
	435	free(SFMDATA[x].desc);
	436	}
	437	SPreSave = PreSave;
	438	SPostSave = PostSave;
c62d2810	439	SFEXINDEX=0;
	440	}
	441
d97315ac	442
c62d2810	443	void AddExState(void v, uint32 s, int type, char desc)
c62d2810	444	{
d97315ac	445	if(desc)
c62d2810	446	{
d97315ac	447	SFMDATA[SFEXINDEX].desc=(char *)FCEU_malloc(5);
c62d2810	448	strcpy(SFMDATA[SFEXINDEX].desc,desc);
c62d2810	449	}
d97315ac	450	else
	451	// SFMDATA[SFEXINDEX].desc=0;
	452	return; // do not support recursive save structures
	453	SFMDATA[SFEXINDEX].v=v;
	454	SFMDATA[SFEXINDEX].s=s;
	455	if(type) SFMDATA[SFEXINDEX].s\|=RLSB;
	456	if(SFEXINDEX<SFMDATA_SIZE-1)
	457	SFEXINDEX++;
	458	else
	459	{
	460	static int once=1;
	461	if(once)
	462	{
	463	once=0;
	464	FCEU_PrintError("Error in AddExState: SFEXINDEX overflow.\nSomebody made SFMDATA_SIZE too small.");
	465	}
	466	}
	467	SFMDATA[SFEXINDEX].v=0; // End marker.
c62d2810	468	}
c62d2810	469
d97315ac	470
c62d2810	471	/* Old state loading code follows */
	472
	473	uint8 *StateBuffer;
	474	unsigned int intostate;
	475
	476	static void afread(void *ptr, size_t _size, size_t _nelem)
	477	{
	478	memcpy(ptr,StateBuffer+intostate,_size*_nelem);
	479	intostate+=_size*_nelem;
	480	}
	481
	482
	483	static void areadlower8of16(int8 *d)
	484	{
	485	#ifdef LSB_FIRST
	486	*d=StateBuffer[intostate++];
	487	#else
	488	d[1]=StateBuffer[intostate++];
	489	#endif
	490	}
	491
	492
	493	static void areadupper8of16(int8 *d)
	494	{
	495	#ifdef LSB_FIRST
	496	d[1]=StateBuffer[intostate++];
	497	#else
	498	*d=StateBuffer[intostate++];
	499	#endif
	500	}
	501
	502
	503	static void aread16(int8 *d)
	504	{
	505	#ifdef LSB_FIRST
	506	*d=StateBuffer[intostate++];
	507	d[1]=StateBuffer[intostate++];
	508	#else
	509	d[1]=StateBuffer[intostate++];
	510	*d=StateBuffer[intostate++];
	511	#endif
	512	}
	513
	514
	515	static void aread32(int8 *d)
	516	{
	517	#ifdef LSB_FIRST
	518	*d=StateBuffer[intostate++];
	519	d[1]=StateBuffer[intostate++];
	520	d[2]=StateBuffer[intostate++];
	521	d[3]=StateBuffer[intostate++];
	522	#else
	523	d[3]=StateBuffer[intostate++];
	524	d[2]=StateBuffer[intostate++];
	525	d[1]=StateBuffer[intostate++];
	526	*d=StateBuffer[intostate++];
	527	#endif
	528	}
	529
	530	static int LoadStateOld(FILE *st)
	531	{
	532	int x;
	533	int32 nada;
	534	uint8 version;
535	nada=0;
22f08d95	536
890e37ba	537	printf("LoadStateOld\n");
890e37ba	538
c62d2810	539	StateBuffer=FCEU_malloc(59999);
	540	if(StateBuffer==NULL)
	541	return 0;
	542	if(!fread(StateBuffer,59999,1,st))
	543	{
	544	fclose(st);
	545	free(StateBuffer);
	546	return 0;
	547	}
	548
	549	intostate=0;
	550
	551	{
	552	uint8 a[2];
	553	afread(&a[0],1,1);
	554	afread(&a[1],1,1);
	555	X.PC=a[0]\|(a[1]<<8);
	556	}
	557	afread(&X.A,1,1);
	558	afread(&X.P,1,1);
	559	afread(&X.X,1,1);
	560	afread(&X.Y,1,1);
	561	afread(&X.S,1,1);
	562	afread(&version,1,1);
	563	afread(&nada,1,1);
	564	afread(&nada,1,1);
	565	afread(&nada,1,1);
	566	afread(&nada,1,1);
	567	aread32((int8 *)&X.count);
	568	afread(&nada,1,1);
	569	afread(&nada,1,1);
	570	afread(&nada,1,1);
	571	afread(&nada,1,1);
	572	aread32((int8 *)&nada);
	573	afread(&nada,1,1);
	574	afread(&nada,1,1);
	575	afread(&nada,1,1);
	576	afread(&nada,1,1);
22f08d95	577
c62d2810	578	for(x=0;x<8;x++)
	579	areadupper8of16((int8 *)&CHRBankList[x]);
	580	afread(PRGBankList,4,1);
	581	for(x=0;x<8;x++)
	582	areadlower8of16((int8 *)&CHRBankList[x]);
	583	afread(CHRRAM,1,0x2000);
	584	afread(NTARAM,1,0x400);
	585	afread(ExtraNTARAM,1,0x400);
	586	afread(NTARAM+0x400,1,0x400);
	587	afread(ExtraNTARAM+0x400,1,0x400);
	588
	589	for(x=0;x<0xF00;x++)
	590	afread(&nada,1,1);
	591	afread(PALRAM,1,0x20);
	592	for(x=0;x<256-32;x++)
	593	afread(&nada,1,1);
	594	for(x=0x00;x<0x20;x++)
	595	PALRAM[x]&=0x3f;
	596	afread(PPU,1,4);
	597	afread(SPRAM,1,0x100);
	598	afread(WRAM,1,8192);
	599	afread(RAM,1,0x800);
	600	aread16((int8 *)&scanline);
	601	aread16((int8 *)&RefreshAddr);
	602	afread(&VRAMBuffer,1,1);
22f08d95	603
c62d2810	604	afread(&IRQa,1,1);
	605	aread32((int8 *)&IRQCount);
	606	aread32((int8 *)&IRQLatch);
	607	afread(&Mirroring,1,1);
	608	afread(PSG,1,0x17);
	609	PSG[0x11]&=0x7F;
	610	afread(MapperExRAM,1,193);
	611	if(version>=31)
	612	PSG[0x17]=MapperExRAM[115];
	613	else
	614	PSG[0x17]\|=0x40;
	615	PSG[0x15]&=0xF;
	616	sqnon=PSG[0x15];
	617
	618	X.IRQlow=0;
	619	afread(&nada,1,1);
	620	afread(&nada,1,1);
	621	afread(&nada,1,1);
	622	afread(&nada,1,1);
	623	afread(&nada,1,1);
	624	afread(&nada,1,1);
	625	afread(&XOffset,1,1);
	626	PPUCHRRAM=0;
	627	for(x=0;x<8;x++)
	628	{
	629	nada=0;
	630	afread(&nada,1,1);
22f08d95	631	PPUCHRRAM\|=(nada?1:0)<<x;
c62d2810	632	}
22f08d95	633
c62d2810	634	afread(mapbyte1,1,8);
	635	afread(mapbyte2,1,8);
	636	afread(mapbyte3,1,8);
	637	afread(mapbyte4,1,8);
	638	for(x=0;x<4;x++)
	639	aread16((int8 *)&nada);
22f08d95	640
c62d2810	641	PPUNTARAM=0;
	642	for(x=0;x<4;x++)
	643	{
	644	nada=0;
	645	aread16((int8 *)&nada);
	646	PPUNTARAM\|=((nada&0x800)?0:1)<<x;
	647	}
	648	afread(MapperExRAM,1,32768);
	649	afread(&vtoggle,1,1);
	650	aread16((int8 *)&TempAddrT);
	651	aread16((int8 *)&RefreshAddrT);
22f08d95	652
c62d2810	653	if(GameStateRestore) GameStateRestore(version);
	654	free(StateBuffer);
	655	FixOldSaveStateSFreq();
	656	X.mooPI=X.P;
	657	return 1;
	658	}
	659