[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 SFORMAT SFMDATA[64];
static int SFEXINDEX;
static int stateversion;

#define RLSB 		0x80000000

#define SFCPUELEMENTS 7

SFORMAT SFCPU[SFCPUELEMENTS]={
 { &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"}
};

#define SFCPUCELEMENTS 6
SFORMAT SFCPUC[SFCPUCELEMENTS]={
 { &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"}
};

static uint16 TempAddrT,RefreshAddrT;

#define SFPPUELEMENTS 10
SFORMAT SFPPU[SFPPUELEMENTS]={
 { NTARAM, 0x800, "NTAR"},
 { PALRAM, 0x20, "PRAM"},
 { SPRAM, 0x100, "SPRA"},
 { PPU, 0x4, "PPUR"},
 { &XOffset, 1, "XOFF"},
 { &vtoggle, 1, "VTOG"},
 { &RefreshAddrT, 2|RLSB, "RADD"},
 { &TempAddrT, 2|RLSB, "TADD"},
 { &VRAMBuffer, 1, "VBUF"},
 { &PPUGenLatch, 1, "PGEN"},
};

// Is this chunk necessary?  I'll fix it later.
//#define SFCTLRELEMENTS 2
//SFORMAT SFCTLR[SFCTLRELEMENTS]={
// { &joy_readbit, 1, "J1RB"},
// { &joy2_readbit, 1, "J2RB"}
//};

#define SFSNDELEMENTS 18
SFORMAT SFSND[SFSNDELEMENTS]={
 { &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"}
};


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

 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 count, int size)
{
 uint8 tmpyo[16];
 int bsize;
 int x;

 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)))
      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;
    }
   }
  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;
}

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

for(;;)
 {
  t=fgetc(st);
  if(t==EOF) break;
  if(!read32(&size,st)) break;
  switch(t)
  {
   case 1:if(!ReadStateChunk(st,SFCPU,SFCPUELEMENTS,size)) ret=0;
#ifdef ASM_6502
          asmcpu_unpack();
#endif
	  break;
   case 2:if(!ReadStateChunk(st,SFCPUC,SFCPUCELEMENTS,size)) ret=0;
          else
	  {
	   X.mooPI=X.P;	// Quick and dirty hack.
	  }
	  break;
   case 3:if(!ReadStateChunk(st,SFPPU,SFPPUELEMENTS,size)) ret=0;break;
//   case 4:if(!ReadStateChunk(st,SFCTLR,SFCTLRELEMENTS,size)) ret=0;break;
   case 5:if(!ReadStateChunk(st,SFSND,SFSNDELEMENTS,size)) ret=0;break;
   case 0x10:if(!ReadStateChunk(st,SFMDATA,SFEXINDEX,size)) ret=0;break;
   default: 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,SFCPUELEMENTS);
	  totalsize+=WriteStateChunk(st,2,SFCPUC,SFCPUCELEMENTS);
	  totalsize+=WriteStateChunk(st,3,SFPPU,SFPPUELEMENTS);
	//  totalsize+=WriteStateChunk(st,4,SFCTLR,SFCTLRELEMENTS);
	  totalsize+=WriteStateChunk(st,5,SFSND,SFSNDELEMENTS);
	  totalsize+=WriteStateChunk(st,0x10,SFMDATA,SFEXINDEX);

	  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);
void LoadState(void)
{
	int x;
	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!=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;
	}
	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)
{
 int x;
 for(x=0;x<SFEXINDEX;x++)
  free(SFMDATA[x].desc);
 SFEXINDEX=0;
}

void AddExState(void *v, uint32 s, int type, char *desc)
{
 SFMDATA[SFEXINDEX].desc=FCEU_malloc(5);
 if(SFMDATA[SFEXINDEX].desc)
 {
  strcpy(SFMDATA[SFEXINDEX].desc,desc);
  SFMDATA[SFEXINDEX].v=v;
  SFMDATA[SFEXINDEX].s=s;
  if(type) SFMDATA[SFEXINDEX].s|=RLSB;
  if(SFEXINDEX<63) SFEXINDEX++;
 }
}

/* 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;

	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
	46	static SFORMAT SFMDATA[64];
	47	static int SFEXINDEX;
	48	static int stateversion;
	49
	50	#define RLSB 0x80000000
	51
	52	#define SFCPUELEMENTS 7
	53
	54	SFORMAT SFCPU[SFCPUELEMENTS]={
	55	{ &X.PC, 2\|RLSB, "PC\0"},
	56	{ &X.A, 1, "A\0\0"},
	57	{ &X.P, 1, "P\0\0"},
	58	{ &X.X, 1, "X\0\0"},
	59	{ &X.Y, 1, "Y\0\0"},
	60	{ &X.S, 1, "S\0\0"},
	61	{ RAM, 0x800, "RAM"}
	62	};
	63
	64	#define SFCPUCELEMENTS 6
	65	SFORMAT SFCPUC[SFCPUCELEMENTS]={
	66	{ &X.jammed, 1, "JAMM"},
	67	{ &X.IRQlow, 1, "IRQL"},
	68	{ &X.tcount, 4\|RLSB, "ICoa"},
	69	{ &X.count, 4\|RLSB, "ICou"},
	70	{ &timestamp, 4\|RLSB, "TIME"},
	71	{ &timestampbase, 8\|RLSB, "TMEB"}
	72	};
	73
	74	static uint16 TempAddrT,RefreshAddrT;
	75
	76	#define SFPPUELEMENTS 10
	77	SFORMAT SFPPU[SFPPUELEMENTS]={
	78	{ NTARAM, 0x800, "NTAR"},
	79	{ PALRAM, 0x20, "PRAM"},
	80	{ SPRAM, 0x100, "SPRA"},
	81	{ PPU, 0x4, "PPUR"},
	82	{ &XOffset, 1, "XOFF"},
	83	{ &vtoggle, 1, "VTOG"},
	84	{ &RefreshAddrT, 2\|RLSB, "RADD"},
	85	{ &TempAddrT, 2\|RLSB, "TADD"},
	86	{ &VRAMBuffer, 1, "VBUF"},
	87	{ &PPUGenLatch, 1, "PGEN"},
	88	};
	89
	90	// Is this chunk necessary? I'll fix it later.
	91	//#define SFCTLRELEMENTS 2
	92	//SFORMAT SFCTLR[SFCTLRELEMENTS]={
	93	// { &joy_readbit, 1, "J1RB"},
	94	// { &joy2_readbit, 1, "J2RB"}
	95	//};
	96
	97	#define SFSNDELEMENTS 18
	98	SFORMAT SFSND[SFSNDELEMENTS]={
	99	{ &fhcnt, 4\|RLSB,"FHCN"},
	100	{ &fcnt, 1, "FCNT"},
	101	{ PSG, 14, "PSG"},
	102	{ &PSG[0x15], 1, "P15"},
	103	{ &PSG[0x17], 1, "P17"},
	104	{ decvolume, 3, "DECV"},
	105	{ &sqnon, 1, "SQNO"},
	106	{ &nreg, 2\|RLSB, "NREG"},
	107	{ &trimode, 1, "TRIM"},
	108	{ &tricoop, 1, "TRIC"},
109	{ sweepon, 2, "SWEE"},
110	{ &curfreq[0], 4\|RLSB,"CRF1"},
111	{ &curfreq[1], 4\|RLSB,"CRF2"},
112	{ SweepCount, 2,"SWCT"},
113	{ DecCountTo1, 3,"DCT1"},
114	{ &PCMBitIndex, 1,"PBIN"},
115	{ &PCMAddressIndex, 4\|RLSB, "PAIN"},
116	{ &PCMSizeIndex, 4\|RLSB, "PSIN"}
117	};
118
119
120	int WriteStateChunk(FILE st, int type, SFORMAT sf, int count)
121	{
122	int bsize;
123	int x;
124
125	fputc(type,st);
22f08d95	126
c62d2810	127	for(x=bsize=0;x<count;x++)
	128	bsize+=sf[x].s&(~RLSB);
	129	bsize+=count<<3;
	130	write32(bsize,st);
	131	for(x=0;x<count;x++)
	132	{
	133	fwrite(sf[x].desc,1,4,st);
	134	write32(sf[x].s&(~RLSB),st);
	135	#ifdef LSB_FIRST
	136	fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
	137	#else
	138	{
	139	int z;
	140	if(sf[x].s&RLSB)
	141	{
	142	for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
	143	{
	144	fputc((uint8)sf[x].v,st);
	145	}
	146	}
	147	else
	148	fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
	149	}
	150	#endif
	151	}
	152	return (bsize+5);
	153	}
	154
	155	int ReadStateChunk(FILE st, SFORMAT sf, int count, int size)
	156	{
	157	uint8 tmpyo[16];
	158	int bsize;
	159	int x;
	160
	161	for(x=bsize=0;x<count;x++)
	162	bsize+=sf[x].s&(~RLSB);
	163	if(stateversion>=53)
	164	bsize+=count<<3;
	165	else
	166	{
	167	if(bsize!=size)
	168	{
	169	fseek(st,size,SEEK_CUR);
	170	return 0;
	171	}
	172	}
	173
	174	if(stateversion<56)
	175	memcpy(tmpyo,mapbyte3,16);
	176
	177	if(stateversion>=53)
	178	{
	179	int temp;
	180	temp=ftell(st);
	181
	182	while(ftell(st)<temp+size)
	183	{
	184	int tsize;
	185	char toa[4];
	186
	187	if(fread(toa,1,4,st)<=0)
	188	return 0;
	189	read32(&tsize,st);
	190
191	for(x=0;x<count;x++)
192	{
193	if(!memcmp(toa,sf[x].desc,4))
194	{
195	if(tsize!=(sf[x].s&(~RLSB)))
196	goto nkayo;
197	#ifndef LSB_FIRST
198	if(sf[x].s&RLSB)
199	{
200	int z;
22f08d95	201	for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
c62d2810	202	(uint8)sf[x].v=fgetc(st);
	203	}
	204	else
	205	#endif
	206	{
	207	fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
	208	}
	209	goto bloo;
	210	}
	211	}
	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
	248	int ReadStateChunks(FILE *st)
	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;
	259	switch(t)
	260	{
92e249b1	261	case 1:if(!ReadStateChunk(st,SFCPU,SFCPUELEMENTS,size)) ret=0;
	262	#ifdef ASM_6502
	263	asmcpu_unpack();
	264	#endif
	265	break;
c62d2810	266	case 2:if(!ReadStateChunk(st,SFCPUC,SFCPUCELEMENTS,size)) ret=0;
	267	else
	268	{
	269	X.mooPI=X.P; // Quick and dirty hack.
	270	}
	271	break;
	272	case 3:if(!ReadStateChunk(st,SFPPU,SFPPUELEMENTS,size)) ret=0;break;
	273	// case 4:if(!ReadStateChunk(st,SFCTLR,SFCTLRELEMENTS,size)) ret=0;break;
	274	case 5:if(!ReadStateChunk(st,SFSND,SFSNDELEMENTS,size)) ret=0;break;
	275	case 0x10:if(!ReadStateChunk(st,SFMDATA,SFEXINDEX,size)) ret=0;break;
	276	default: if(fseek(st,size,SEEK_CUR)<0) goto endo;break;
	277	}
	278	}
	279	endo:
	280	return ret;
	281	}
	282
	283
	284	int CurrentState=0;
	285	extern int geniestage;
	286	void SaveState(void)
	287	{
	288	FILE *st=NULL;
	289
	290	TempAddrT=TempAddr;
	291	RefreshAddrT=RefreshAddr;
	292
	293	if(geniestage==1)
	294	{
	295	FCEU_DispMessage("Cannot save FCS in GG screen.");
	296	return;
	297	}
	298
	299	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"wb");
	300
	301	if(st!=NULL)
	302	{
	303	static uint32 totalsize;
	304	static uint8 header[16]="FCS";
	305	memset(header+4,0,13);
	306	header[3]=VERSION_NUMERIC;
	307	fwrite(header,1,16,st);
	308
92e249b1	309	#ifdef ASM_6502
	310	asmcpu_pack();
	311	#endif
c62d2810	312	totalsize=WriteStateChunk(st,1,SFCPU,SFCPUELEMENTS);
	313	totalsize+=WriteStateChunk(st,2,SFCPUC,SFCPUCELEMENTS);
	314	totalsize+=WriteStateChunk(st,3,SFPPU,SFPPUELEMENTS);
	315	// totalsize+=WriteStateChunk(st,4,SFCTLR,SFCTLRELEMENTS);
	316	totalsize+=WriteStateChunk(st,5,SFSND,SFSNDELEMENTS);
	317	totalsize+=WriteStateChunk(st,0x10,SFMDATA,SFEXINDEX);
22f08d95	318
c62d2810	319	fseek(st,4,SEEK_SET);
	320	write32(totalsize,st);
	321	SaveStateStatus[CurrentState]=1;
	322	fclose(st);
92e249b1	323	#ifdef GP2X
	324	sync();
	325	#endif
c62d2810	326	FCEU_DispMessage("State %d saved.",CurrentState);
	327	}
	328	else
	329	FCEU_DispMessage("State %d save error.",CurrentState);
	330	}
	331
	332	static int LoadStateOld(FILE *st);
	333	void LoadState(void)
	334	{
	335	int x;
	336	FILE *st=NULL;
	337
	338	if(geniestage==1)
	339	{
	340	FCEU_DispMessage("Cannot load FCS in GG screen.");
	341	return;
	342	}
	343
	344	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"rb");
	345
	346	if(st!=NULL)
	347	{
	348	uint8 header[16];
	349
	350	fread(&header,1,16,st);
	351	if(memcmp(header,"FCS",3))
	352	{
22f08d95	353	fseek(st,0,SEEK_SET);
c62d2810	354	if(!LoadStateOld(st))
	355	goto lerror;
	356	goto okload;
	357	}
	358	stateversion=header[3];
	359	if(stateversion<53)
	360	FixOldSaveStateSFreq();
	361	x=ReadStateChunks(st);
	362	if(GameStateRestore) GameStateRestore(header[3]);
	363	if(x)
	364	{
	365	okload:
	366	TempAddr=TempAddrT;
	367	RefreshAddr=RefreshAddrT;
	368
	369	SaveStateStatus[CurrentState]=1;
	370	FCEU_DispMessage("State %d loaded.",CurrentState);
	371	SaveStateStatus[CurrentState]=1;
	372	}
	373	else
	374	{
	375	SaveStateStatus[CurrentState]=1;
	376	FCEU_DispMessage("Error(s) reading state %d!",CurrentState);
	377	}
	378	}
	379	else
	380	{
	381	lerror:
	382	FCEU_DispMessage("State %d load error.",CurrentState);
	383	SaveStateStatus[CurrentState]=0;
	384	return;
	385	}
	386	fclose(st);
	387	}
	388
	389	char SaveStateStatus[10];
	390	void CheckStates(void)
	391	{
	392	FILE *st=NULL;
	393	int ssel;
	394
22f08d95	395	if(SaveStateStatus[0]==(char)-1)
c62d2810	396	for(ssel=0;ssel<10;ssel++)
	397	{
	398	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,ssel,0),"rb");
	399	if(st)
	400	{
	401	SaveStateStatus[ssel]=1;
	402	fclose(st);
	403	}
	404	else
	405	SaveStateStatus[ssel]=0;
	406	}
	407	}
	408
	409	void SaveStateRefresh(void)
	410	{
	411	SaveStateStatus[0]=-1;
	412	}
	413
	414	void ResetExState(void)
	415	{
	416	int x;
	417	for(x=0;x<SFEXINDEX;x++)
	418	free(SFMDATA[x].desc);
	419	SFEXINDEX=0;
	420	}
	421
	422	void AddExState(void v, uint32 s, int type, char desc)
	423	{
	424	SFMDATA[SFEXINDEX].desc=FCEU_malloc(5);
	425	if(SFMDATA[SFEXINDEX].desc)
	426	{
	427	strcpy(SFMDATA[SFEXINDEX].desc,desc);
	428	SFMDATA[SFEXINDEX].v=v;
	429	SFMDATA[SFEXINDEX].s=s;
	430	if(type) SFMDATA[SFEXINDEX].s\|=RLSB;
	431	if(SFEXINDEX<63) SFEXINDEX++;
	432	}
	433	}
	434
	435	/* Old state loading code follows */
	436
	437	uint8 *StateBuffer;
	438	unsigned int intostate;
	439
	440	static void afread(void *ptr, size_t _size, size_t _nelem)
	441	{
	442	memcpy(ptr,StateBuffer+intostate,_size*_nelem);
	443	intostate+=_size*_nelem;
	444	}
	445
	446
	447	static void areadlower8of16(int8 *d)
	448	{
	449	#ifdef LSB_FIRST
	450	*d=StateBuffer[intostate++];
	451	#else
	452	d[1]=StateBuffer[intostate++];
	453	#endif
	454	}
	455
	456
	457	static void areadupper8of16(int8 *d)
	458	{
	459	#ifdef LSB_FIRST
460	d[1]=StateBuffer[intostate++];
461	#else
462	*d=StateBuffer[intostate++];
463	#endif
464	}
465
466
467	static void aread16(int8 *d)
468	{
469	#ifdef LSB_FIRST
470	*d=StateBuffer[intostate++];
471	d[1]=StateBuffer[intostate++];
472	#else
473	d[1]=StateBuffer[intostate++];
474	*d=StateBuffer[intostate++];
475	#endif
476	}
477
478
479	static void aread32(int8 *d)
480	{
481	#ifdef LSB_FIRST
482	*d=StateBuffer[intostate++];
483	d[1]=StateBuffer[intostate++];
484	d[2]=StateBuffer[intostate++];
485	d[3]=StateBuffer[intostate++];
486	#else
487	d[3]=StateBuffer[intostate++];
488	d[2]=StateBuffer[intostate++];
489	d[1]=StateBuffer[intostate++];
490	*d=StateBuffer[intostate++];
491	#endif
492	}
493
494	static int LoadStateOld(FILE *st)
495	{
496	int x;
497	int32 nada;
498	uint8 version;
499	nada=0;
22f08d95	500
c62d2810	501	StateBuffer=FCEU_malloc(59999);
	502	if(StateBuffer==NULL)
	503	return 0;
	504	if(!fread(StateBuffer,59999,1,st))
	505	{
	506	fclose(st);
	507	free(StateBuffer);
	508	return 0;
	509	}
	510
	511	intostate=0;
	512
	513	{
	514	uint8 a[2];
	515	afread(&a[0],1,1);
	516	afread(&a[1],1,1);
	517	X.PC=a[0]\|(a[1]<<8);
	518	}
	519	afread(&X.A,1,1);
	520	afread(&X.P,1,1);
	521	afread(&X.X,1,1);
	522	afread(&X.Y,1,1);
	523	afread(&X.S,1,1);
	524	afread(&version,1,1);
	525	afread(&nada,1,1);
	526	afread(&nada,1,1);
	527	afread(&nada,1,1);
	528	afread(&nada,1,1);
	529	aread32((int8 *)&X.count);
	530	afread(&nada,1,1);
	531	afread(&nada,1,1);
	532	afread(&nada,1,1);
	533	afread(&nada,1,1);
	534	aread32((int8 *)&nada);
	535	afread(&nada,1,1);
	536	afread(&nada,1,1);
	537	afread(&nada,1,1);
	538	afread(&nada,1,1);
22f08d95	539
c62d2810	540	for(x=0;x<8;x++)
	541	areadupper8of16((int8 *)&CHRBankList[x]);
	542	afread(PRGBankList,4,1);
	543	for(x=0;x<8;x++)
	544	areadlower8of16((int8 *)&CHRBankList[x]);
	545	afread(CHRRAM,1,0x2000);
	546	afread(NTARAM,1,0x400);
	547	afread(ExtraNTARAM,1,0x400);
	548	afread(NTARAM+0x400,1,0x400);
	549	afread(ExtraNTARAM+0x400,1,0x400);
	550
	551	for(x=0;x<0xF00;x++)
	552	afread(&nada,1,1);
	553	afread(PALRAM,1,0x20);
	554	for(x=0;x<256-32;x++)
	555	afread(&nada,1,1);
	556	for(x=0x00;x<0x20;x++)
	557	PALRAM[x]&=0x3f;
	558	afread(PPU,1,4);
	559	afread(SPRAM,1,0x100);
	560	afread(WRAM,1,8192);
	561	afread(RAM,1,0x800);
	562	aread16((int8 *)&scanline);
	563	aread16((int8 *)&RefreshAddr);
	564	afread(&VRAMBuffer,1,1);
22f08d95	565
c62d2810	566	afread(&IRQa,1,1);
	567	aread32((int8 *)&IRQCount);
	568	aread32((int8 *)&IRQLatch);
	569	afread(&Mirroring,1,1);
	570	afread(PSG,1,0x17);
	571	PSG[0x11]&=0x7F;
	572	afread(MapperExRAM,1,193);
	573	if(version>=31)
	574	PSG[0x17]=MapperExRAM[115];
	575	else
	576	PSG[0x17]\|=0x40;
	577	PSG[0x15]&=0xF;
	578	sqnon=PSG[0x15];
	579
	580	X.IRQlow=0;
	581	afread(&nada,1,1);
	582	afread(&nada,1,1);
	583	afread(&nada,1,1);
	584	afread(&nada,1,1);
	585	afread(&nada,1,1);
	586	afread(&nada,1,1);
	587	afread(&XOffset,1,1);
	588	PPUCHRRAM=0;
	589	for(x=0;x<8;x++)
	590	{
	591	nada=0;
	592	afread(&nada,1,1);
22f08d95	593	PPUCHRRAM\|=(nada?1:0)<<x;
c62d2810	594	}
22f08d95	595
c62d2810	596	afread(mapbyte1,1,8);
	597	afread(mapbyte2,1,8);
	598	afread(mapbyte3,1,8);
	599	afread(mapbyte4,1,8);
	600	for(x=0;x<4;x++)
	601	aread16((int8 *)&nada);
22f08d95	602
c62d2810	603	PPUNTARAM=0;
	604	for(x=0;x<4;x++)
	605	{
	606	nada=0;
	607	aread16((int8 *)&nada);
	608	PPUNTARAM\|=((nada&0x800)?0:1)<<x;
	609	}
	610	afread(MapperExRAM,1,32768);
	611	afread(&vtoggle,1,1);
	612	aread16((int8 *)&TempAddrT);
	613	aread16((int8 *)&RefreshAddrT);
22f08d95	614
c62d2810	615	if(GameStateRestore) GameStateRestore(version);
	616	free(StateBuffer);
	617	FixOldSaveStateSFreq();
	618	X.mooPI=X.P;
	619	return 1;
	620	}
	621