[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;

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

	  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)
{
 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;

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