[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, }
};


static int SubWrite(FILE *st, SFORMAT *sf)
{
 uint32 acc=0;

 while(sf->v)
 {
  if(sf->s==~0)		/* Link to another struct.	*/
  {
   uint32 tmp;

   if(!(tmp=SubWrite(st,(SFORMAT *)sf->v)))
    return(0);
   acc+=tmp;
   sf++;
   continue;
  }

  acc+=8;			/* Description + size */
  acc+=sf->s&(~RLSB);

  if(st)			/* Are we writing or calculating the size of this block? */
  {
   fwrite(sf->desc,1,4,st);
   write32le(sf->s&(~RLSB),st);

   #ifndef LSB_FIRST
   if(sf->s&RLSB)
    FlipByteOrder(sf->v,sf->s&(~RLSB));
   #endif

   fwrite((uint8 *)sf->v,1,sf->s&(~RLSB),st);
   /* Now restore the original byte order. */
   #ifndef LSB_FIRST
   if(sf->s&RLSB)
    FlipByteOrder(sf->v,sf->s&(~RLSB));
   #endif
  }
  sf++;
 }

 return(acc);
}

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

 fputc(type,st);

 bsize=SubWrite(0,sf);
 write32le(bsize,st);

 if(!SubWrite(st,sf))
 {
	 return(0);
 }
 return (bsize+5);
}

static SFORMAT *CheckS(SFORMAT *sf, uint32 tsize, char *desc)
{
 while(sf->v)
 {
  if(sf->s==~0)		/* 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&(~RLSB)))
   {
    printf("ReadStateChunk: sect \"%c%c%c%c\" has wrong size\n", desc[0], desc[1], desc[2], desc[3]);
    return(0);
   }
   return(sf);
  }
  sf++;
 }
 return(0);
}

static int ReadStateChunk(FILE *st, SFORMAT *sf, int size)
{
 //if(scan_chunks)
 //  return fseek(st,size,SEEK_CUR) == 0;

 SFORMAT *tmp;
 int temp;
 temp=ftell(st);

 while(ftell(st)<temp+size)
 {
  uint32 tsize;
  char toa[4];
  if(fread(toa,1,4,st)<=0)
   return 0;

  read32le(&tsize,st);

  if((tmp=CheckS(sf,tsize,toa)))
  {
   fread((uint8 *)tmp->v,1,tmp->s&(~RLSB),st);

   #ifndef LSB_FIRST
   if(tmp->s&RLSB)
    FlipByteOrder(tmp->v,tmp->s&(~RLSB));
   #endif
  }
  else
  {
   fseek(st,tsize,SEEK_CUR);
   printf("ReadStateChunk: sect \"%c%c%c%c\" not handled\n", toa[0], toa[1], toa[2], toa[3]);
  }
 } // while(...)
 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;
	char *fname;

	TempAddrT=TempAddr;
	RefreshAddrT=RefreshAddr;

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

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

	 if(st!=NULL)
	 {
	  uint32 totalsize;
	  uint8 header[16]="FCS";
	  memset(header+4,0,sizeof(header)-4);
	  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;
	char *fname;

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

	fname = FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0);
	st=fopen(fname,"rb");
	free(fname);

	if (st)
	{
	 FCEUSS_LoadFP(st, 0);
	 fclose(st);
	}
	else
	{
	 FCEU_DispMessage("State %d load error (no file).",CurrentState);
	 SaveStateStatus[CurrentState]=0;
	}
}

char SaveStateStatus[10];
#if 0 // leaks memory
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;
	 }
}
#endif

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;
 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
0bb3fe12	109	static int SubWrite(FILE st, SFORMAT sf)
c62d2810	110	{
0bb3fe12	111	uint32 acc=0;
c62d2810	112
0bb3fe12	113	while(sf->v)
	114	{
	115	if(sf->s==~0) /* Link to another struct. */
	116	{
	117	uint32 tmp;
	118
	119	if(!(tmp=SubWrite(st,(SFORMAT *)sf->v)))
	120	return(0);
	121	acc+=tmp;
	122	sf++;
	123	continue;
	124	}
	125
	126	acc+=8; /* Description + size */
	127	acc+=sf->s&(~RLSB);
	128
	129	if(st) /* Are we writing or calculating the size of this block? */
	130	{
	131	fwrite(sf->desc,1,4,st);
	132	write32le(sf->s&(~RLSB),st);
	133
	134	#ifndef LSB_FIRST
	135	if(sf->s&RLSB)
	136	FlipByteOrder(sf->v,sf->s&(~RLSB));
	137	#endif
	138
	139	fwrite((uint8 *)sf->v,1,sf->s&(~RLSB),st);
	140	/* Now restore the original byte order. */
	141	#ifndef LSB_FIRST
	142	if(sf->s&RLSB)
	143	FlipByteOrder(sf->v,sf->s&(~RLSB));
	144	#endif
	145	}
	146	sf++;
	147	}
	148
	149	return(acc);
	150	}
	151
	152	static int WriteStateChunk(FILE st, int type, SFORMAT sf)
	153	{
	154	int bsize;
890e37ba	155
c62d2810	156	fputc(type,st);
22f08d95	157
0bb3fe12	158	bsize=SubWrite(0,sf);
	159	write32le(bsize,st);
	160
	161	if(!SubWrite(st,sf))
	162	{
	163	return(0);
	164	}
	165	return (bsize+5);
	166	}
	167
	168	static SFORMAT CheckS(SFORMAT sf, uint32 tsize, char *desc)
	169	{
	170	while(sf->v)
c62d2810	171	{
0bb3fe12	172	if(sf->s==~0) /* Link to another SFORMAT structure. */
c62d2810	173	{
0bb3fe12	174	SFORMAT *tmp;
	175	if((tmp= CheckS((SFORMAT *)sf->v, tsize, desc) ))
	176	return(tmp);
	177	sf++;
	178	continue;
	179	}
	180	if(!memcmp(desc,sf->desc,4))
c62d2810	181	{
0bb3fe12	182	if(tsize!=(sf->s&(~RLSB)))
c62d2810	183	{
0bb3fe12	184	printf("ReadStateChunk: sect \"%c%c%c%c\" has wrong size\n", desc[0], desc[1], desc[2], desc[3]);
0bb3fe12	185	return(0);
c62d2810	186	}
0bb3fe12	187	return(sf);
c62d2810	188	}
0bb3fe12	189	sf++;
c62d2810	190	}
0bb3fe12	191	return(0);
c62d2810	192	}
c62d2810	193
0bb3fe12	194	static int ReadStateChunk(FILE st, SFORMAT sf, int size)
c62d2810	195	{
0bb3fe12	196	//if(scan_chunks)
0bb3fe12	197	// return fseek(st,size,SEEK_CUR) == 0;
c62d2810	198
0bb3fe12	199	SFORMAT *tmp;
	200	int temp;
	201	temp=ftell(st);
890e37ba	202
0bb3fe12	203	while(ftell(st)<temp+size)
c62d2810	204	{
0bb3fe12	205	uint32 tsize;
	206	char toa[4];
	207	if(fread(toa,1,4,st)<=0)
c62d2810	208	return 0;
c62d2810	209
0bb3fe12	210	read32le(&tsize,st);
c62d2810	211
0bb3fe12	212	if((tmp=CheckS(sf,tsize,toa)))
c62d2810	213	{
0bb3fe12	214	fread((uint8 *)tmp->v,1,tmp->s&(~RLSB),st);
c62d2810	215
0bb3fe12	216	#ifndef LSB_FIRST
	217	if(tmp->s&RLSB)
	218	FlipByteOrder(tmp->v,tmp->s&(~RLSB));
c62d2810	219	#endif
c62d2810	220	}
0bb3fe12	221	else
	222	{
	223	fseek(st,tsize,SEEK_CUR);
	224	printf("ReadStateChunk: sect \"%c%c%c%c\" not handled\n", toa[0], toa[1], toa[2], toa[3]);
	225	}
	226	} // while(...)
c62d2810	227	return 1;
	228	}
	229
0bb3fe12	230
890e37ba	231	static int ReadStateChunks(FILE *st)
c62d2810	232	{
	233	int t;
	234	uint32 size;
	235	int ret=1;
	236
	237	for(;;)
	238	{
	239	t=fgetc(st);
	240	if(t==EOF) break;
	241	if(!read32(&size,st)) break;
890e37ba	242
890e37ba	243	// printf("ReadStateChunks: chunk %i\n", t);
c62d2810	244	switch(t)
c62d2810	245	{
890e37ba	246	case 1:if(!ReadStateChunk(st,SFCPU,size)) ret=0;
92e249b1	247	#ifdef ASM_6502
	248	asmcpu_unpack();
	249	#endif
	250	break;
890e37ba	251	case 2:if(!ReadStateChunk(st,SFCPUC,size)) ret=0;
c62d2810	252	else
	253	{
	254	X.mooPI=X.P; // Quick and dirty hack.
	255	}
	256	break;
890e37ba	257	case 3:if(!ReadStateChunk(st,FCEUPPU_STATEINFO,size)) ret=0;break;
890e37ba	258	case 4:if(!ReadStateChunk(st,FCEUCTRL_STATEINFO,size)) ret=0;break;
39e1ccff	259	case 5:if(!ReadStateChunk(st,SFSND,size)) ret=0;break;
890e37ba	260	case 0x10:if(!ReadStateChunk(st,SFMDATA,size)) ret=0;break;
	261	default:printf("ReadStateChunks: unknown chunk: %i\n", t);
	262	if(fseek(st,size,SEEK_CUR)<0) goto endo;break;
c62d2810	263	}
	264	}
	265	endo:
	266	return ret;
	267	}
	268
	269
	270	int CurrentState=0;
	271	extern int geniestage;
	272	void SaveState(void)
	273	{
	274	FILE *st=NULL;
971a1d07	275	char *fname;
c62d2810	276
	277	TempAddrT=TempAddr;
	278	RefreshAddrT=RefreshAddr;
	279
	280	if(geniestage==1)
	281	{
	282	FCEU_DispMessage("Cannot save FCS in GG screen.");
	283	return;
	284	}
	285
971a1d07	286	fname = FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0);
	287	st=fopen(fname,"wb");
	288	free(fname);
c62d2810	289
	290	if(st!=NULL)
	291	{
ed531dd6	292	uint32 totalsize;
	293	uint8 header[16]="FCS";
	294	memset(header+4,0,sizeof(header)-4);
c62d2810	295	header[3]=VERSION_NUMERIC;
	296	fwrite(header,1,16,st);
	297
92e249b1	298	#ifdef ASM_6502
	299	asmcpu_pack();
	300	#endif
890e37ba	301	totalsize=WriteStateChunk(st,1,SFCPU);
	302	totalsize+=WriteStateChunk(st,2,SFCPUC);
	303	totalsize+=WriteStateChunk(st,3,FCEUPPU_STATEINFO);
	304	totalsize+=WriteStateChunk(st,4,FCEUCTRL_STATEINFO);
39e1ccff	305	totalsize+=WriteStateChunk(st,5,SFSND);
d97315ac	306
	307
	308	if(SPreSave) SPreSave();
890e37ba	309	totalsize+=WriteStateChunk(st,0x10,SFMDATA);
d97315ac	310	if(SPostSave) SPostSave();
22f08d95	311
c62d2810	312	fseek(st,4,SEEK_SET);
	313	write32(totalsize,st);
	314	SaveStateStatus[CurrentState]=1;
	315	fclose(st);
92e249b1	316	#ifdef GP2X
	317	sync();
	318	#endif
c62d2810	319	FCEU_DispMessage("State %d saved.",CurrentState);
	320	}
	321	else
	322	FCEU_DispMessage("State %d save error.",CurrentState);
	323	}
	324
	325	static int LoadStateOld(FILE *st);
5a2aa426	326	int FCEUSS_LoadFP(FILE *st, int make_backup)
c62d2810	327	{
c62d2810	328	int x;
c62d2810	329	if(st!=NULL)
	330	{
	331	uint8 header[16];
	332
	333	fread(&header,1,16,st);
	334	if(memcmp(header,"FCS",3))
	335	{
22f08d95	336	fseek(st,0,SEEK_SET);
c62d2810	337	if(!LoadStateOld(st))
	338	goto lerror;
	339	goto okload;
	340	}
	341	stateversion=header[3];
	342	if(stateversion<53)
	343	FixOldSaveStateSFreq();
	344	x=ReadStateChunks(st);
	345	if(GameStateRestore) GameStateRestore(header[3]);
	346	if(x)
	347	{
	348	okload:
	349	TempAddr=TempAddrT;
	350	RefreshAddr=RefreshAddrT;
	351
	352	SaveStateStatus[CurrentState]=1;
	353	FCEU_DispMessage("State %d loaded.",CurrentState);
	354	SaveStateStatus[CurrentState]=1;
	355	}
	356	else
	357	{
	358	SaveStateStatus[CurrentState]=1;
	359	FCEU_DispMessage("Error(s) reading state %d!",CurrentState);
	360	}
	361	}
	362	else
	363	{
	364	lerror:
	365	FCEU_DispMessage("State %d load error.",CurrentState);
	366	SaveStateStatus[CurrentState]=0;
5a2aa426	367	return 0;
	368	}
	369	return 1;
	370	}
	371
	372	void LoadState(void)
	373	{
	374	FILE *st=NULL;
971a1d07	375	char *fname;
5a2aa426	376
	377	if(geniestage==1)
	378	{
	379	FCEU_DispMessage("Cannot load FCS in GG screen.");
	380	return;
	381	}
	382
971a1d07	383	fname = FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0);
	384	st=fopen(fname,"rb");
	385	free(fname);
	386
5a2aa426	387	if (st)
	388	{
	389	FCEUSS_LoadFP(st, 0);
	390	fclose(st);
c62d2810	391	}
971a1d07	392	else
	393	{
	394	FCEU_DispMessage("State %d load error (no file).",CurrentState);
	395	SaveStateStatus[CurrentState]=0;
	396	}
c62d2810	397	}
	398
	399	char SaveStateStatus[10];
971a1d07	400	#if 0 // leaks memory
c62d2810	401	void CheckStates(void)
	402	{
	403	FILE *st=NULL;
	404	int ssel;
	405
22f08d95	406	if(SaveStateStatus[0]==(char)-1)
c62d2810	407	for(ssel=0;ssel<10;ssel++)
	408	{
	409	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,ssel,0),"rb");
	410	if(st)
	411	{
	412	SaveStateStatus[ssel]=1;
	413	fclose(st);
	414	}
	415	else
	416	SaveStateStatus[ssel]=0;
	417	}
	418	}
971a1d07	419	#endif
c62d2810	420
	421	void SaveStateRefresh(void)
	422	{
	423	SaveStateStatus[0]=-1;
	424	}
	425
d97315ac	426	void ResetExState(void (PreSave)(void), void (PostSave)(void))
c62d2810	427	{
	428	int x;
	429	for(x=0;x<SFEXINDEX;x++)
d97315ac	430	{
	431	if(SFMDATA[x].desc)
	432	free(SFMDATA[x].desc);
	433	}
	434	SPreSave = PreSave;
	435	SPostSave = PostSave;
c62d2810	436	SFEXINDEX=0;
	437	}
	438
d97315ac	439
c62d2810	440	void AddExState(void v, uint32 s, int type, char desc)
c62d2810	441	{
d97315ac	442	if(desc)
c62d2810	443	{
d97315ac	444	SFMDATA[SFEXINDEX].desc=(char *)FCEU_malloc(5);
c62d2810	445	strcpy(SFMDATA[SFEXINDEX].desc,desc);
c62d2810	446	}
d97315ac	447	else
0bb3fe12	448	SFMDATA[SFEXINDEX].desc=0;
d97315ac	449	SFMDATA[SFEXINDEX].v=v;
	450	SFMDATA[SFEXINDEX].s=s;
	451	if(type) SFMDATA[SFEXINDEX].s\|=RLSB;
	452	if(SFEXINDEX<SFMDATA_SIZE-1)
	453	SFEXINDEX++;
	454	else
	455	{
	456	static int once=1;
	457	if(once)
	458	{
	459	once=0;
	460	FCEU_PrintError("Error in AddExState: SFEXINDEX overflow.\nSomebody made SFMDATA_SIZE too small.");
	461	}
	462	}
	463	SFMDATA[SFEXINDEX].v=0; // End marker.
c62d2810	464	}
c62d2810	465
d97315ac	466
c62d2810	467	/* Old state loading code follows */
	468
	469	uint8 *StateBuffer;
	470	unsigned int intostate;
	471
	472	static void afread(void *ptr, size_t _size, size_t _nelem)
	473	{
	474	memcpy(ptr,StateBuffer+intostate,_size*_nelem);
	475	intostate+=_size*_nelem;
	476	}
	477
	478
	479	static void areadlower8of16(int8 *d)
	480	{
	481	#ifdef LSB_FIRST
	482	*d=StateBuffer[intostate++];
	483	#else
	484	d[1]=StateBuffer[intostate++];
	485	#endif
	486	}
	487
	488
	489	static void areadupper8of16(int8 *d)
	490	{
	491	#ifdef LSB_FIRST
	492	d[1]=StateBuffer[intostate++];
	493	#else
	494	*d=StateBuffer[intostate++];
	495	#endif
	496	}
	497
	498
	499	static void aread16(int8 *d)
	500	{
	501	#ifdef LSB_FIRST
	502	*d=StateBuffer[intostate++];
	503	d[1]=StateBuffer[intostate++];
	504	#else
	505	d[1]=StateBuffer[intostate++];
	506	*d=StateBuffer[intostate++];
	507	#endif
	508	}
	509
	510
	511	static void aread32(int8 *d)
	512	{
	513	#ifdef LSB_FIRST
	514	*d=StateBuffer[intostate++];
	515	d[1]=StateBuffer[intostate++];
	516	d[2]=StateBuffer[intostate++];
	517	d[3]=StateBuffer[intostate++];
	518	#else
	519	d[3]=StateBuffer[intostate++];
	520	d[2]=StateBuffer[intostate++];
	521	d[1]=StateBuffer[intostate++];
	522	*d=StateBuffer[intostate++];
	523	#endif
	524	}
	525
	526	static int LoadStateOld(FILE *st)
	527	{
	528	int x;
	529	int32 nada;
	530	uint8 version;
531	nada=0;
22f08d95	532
890e37ba	533	printf("LoadStateOld\n");
890e37ba	534
c62d2810	535	StateBuffer=FCEU_malloc(59999);
	536	if(StateBuffer==NULL)
	537	return 0;
	538	if(!fread(StateBuffer,59999,1,st))
	539	{
	540	fclose(st);
	541	free(StateBuffer);
	542	return 0;
	543	}
	544
	545	intostate=0;
	546
	547	{
	548	uint8 a[2];
	549	afread(&a[0],1,1);
	550	afread(&a[1],1,1);
	551	X.PC=a[0]\|(a[1]<<8);
	552	}
	553	afread(&X.A,1,1);
	554	afread(&X.P,1,1);
	555	afread(&X.X,1,1);
	556	afread(&X.Y,1,1);
	557	afread(&X.S,1,1);
	558	afread(&version,1,1);
	559	afread(&nada,1,1);
	560	afread(&nada,1,1);
	561	afread(&nada,1,1);
	562	afread(&nada,1,1);
	563	aread32((int8 *)&X.count);
	564	afread(&nada,1,1);
	565	afread(&nada,1,1);
	566	afread(&nada,1,1);
	567	afread(&nada,1,1);
	568	aread32((int8 *)&nada);
	569	afread(&nada,1,1);
	570	afread(&nada,1,1);
	571	afread(&nada,1,1);
	572	afread(&nada,1,1);
22f08d95	573
c62d2810	574	for(x=0;x<8;x++)
	575	areadupper8of16((int8 *)&CHRBankList[x]);
	576	afread(PRGBankList,4,1);
	577	for(x=0;x<8;x++)
	578	areadlower8of16((int8 *)&CHRBankList[x]);
	579	afread(CHRRAM,1,0x2000);
	580	afread(NTARAM,1,0x400);
	581	afread(ExtraNTARAM,1,0x400);
	582	afread(NTARAM+0x400,1,0x400);
	583	afread(ExtraNTARAM+0x400,1,0x400);
	584
	585	for(x=0;x<0xF00;x++)
	586	afread(&nada,1,1);
	587	afread(PALRAM,1,0x20);
	588	for(x=0;x<256-32;x++)
	589	afread(&nada,1,1);
	590	for(x=0x00;x<0x20;x++)
	591	PALRAM[x]&=0x3f;
	592	afread(PPU,1,4);
	593	afread(SPRAM,1,0x100);
	594	afread(WRAM,1,8192);
	595	afread(RAM,1,0x800);
	596	aread16((int8 *)&scanline);
	597	aread16((int8 *)&RefreshAddr);
	598	afread(&VRAMBuffer,1,1);
22f08d95	599
c62d2810	600	afread(&IRQa,1,1);
	601	aread32((int8 *)&IRQCount);
	602	aread32((int8 *)&IRQLatch);
	603	afread(&Mirroring,1,1);
	604	afread(PSG,1,0x17);
	605	PSG[0x11]&=0x7F;
	606	afread(MapperExRAM,1,193);
	607	if(version>=31)
	608	PSG[0x17]=MapperExRAM[115];
	609	else
	610	PSG[0x17]\|=0x40;
	611	PSG[0x15]&=0xF;
	612	sqnon=PSG[0x15];
	613
	614	X.IRQlow=0;
	615	afread(&nada,1,1);
	616	afread(&nada,1,1);
	617	afread(&nada,1,1);
	618	afread(&nada,1,1);
	619	afread(&nada,1,1);
	620	afread(&nada,1,1);
	621	afread(&XOffset,1,1);
	622	PPUCHRRAM=0;
	623	for(x=0;x<8;x++)
	624	{
	625	nada=0;
	626	afread(&nada,1,1);
22f08d95	627	PPUCHRRAM\|=(nada?1:0)<<x;
c62d2810	628	}
22f08d95	629
c62d2810	630	afread(mapbyte1,1,8);
	631	afread(mapbyte2,1,8);
	632	afread(mapbyte3,1,8);
	633	afread(mapbyte4,1,8);
	634	for(x=0;x<4;x++)
	635	aread16((int8 *)&nada);
22f08d95	636
c62d2810	637	PPUNTARAM=0;
	638	for(x=0;x<4;x++)
	639	{
	640	nada=0;
	641	aread16((int8 *)&nada);
	642	PPUNTARAM\|=((nada&0x800)?0:1)<<x;
	643	}
	644	afread(MapperExRAM,1,32768);
	645	afread(&vtoggle,1,1);
	646	aread16((int8 *)&TempAddrT);
	647	aread16((int8 *)&RefreshAddrT);
22f08d95	648
c62d2810	649	if(GameStateRestore) GameStateRestore(version);
	650	free(StateBuffer);
	651	FixOldSaveStateSFreq();
	652	X.mooPI=X.P;
	653	return 1;
	654	}
	655