[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>

#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"

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;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);

	  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);
	  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]==-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>
	27
	28	#include "types.h"
	29	#include "x6502.h"
	30	#include "version.h"
	31	#include "fce.h"
	32	#include "sound.h"
	33	#define INESPRIV // Take this out when old save state support is removed in a future version.
	34	#include "ines.h"
	35	#include "svga.h"
	36	#include "endian.h"
	37	#include "fds.h"
	38	#include "general.h"
	39	#include "state.h"
	40	#include "memory.h"
	41
	42	static SFORMAT SFMDATA[64];
	43	static int SFEXINDEX;
	44	static int stateversion;
	45
	46	#define RLSB 0x80000000
	47
	48	#define SFCPUELEMENTS 7
	49
	50	SFORMAT SFCPU[SFCPUELEMENTS]={
	51	{ &X.PC, 2\|RLSB, "PC\0"},
	52	{ &X.A, 1, "A\0\0"},
	53	{ &X.P, 1, "P\0\0"},
	54	{ &X.X, 1, "X\0\0"},
	55	{ &X.Y, 1, "Y\0\0"},
	56	{ &X.S, 1, "S\0\0"},
	57	{ RAM, 0x800, "RAM"}
	58	};
	59
	60	#define SFCPUCELEMENTS 6
	61	SFORMAT SFCPUC[SFCPUCELEMENTS]={
	62	{ &X.jammed, 1, "JAMM"},
	63	{ &X.IRQlow, 1, "IRQL"},
	64	{ &X.tcount, 4\|RLSB, "ICoa"},
65	{ &X.count, 4\|RLSB, "ICou"},
66	{ &timestamp, 4\|RLSB, "TIME"},
67	{ &timestampbase, 8\|RLSB, "TMEB"}
68	};
69
70	static uint16 TempAddrT,RefreshAddrT;
71
72	#define SFPPUELEMENTS 10
73	SFORMAT SFPPU[SFPPUELEMENTS]={
74	{ NTARAM, 0x800, "NTAR"},
75	{ PALRAM, 0x20, "PRAM"},
76	{ SPRAM, 0x100, "SPRA"},
77	{ PPU, 0x4, "PPUR"},
78	{ &XOffset, 1, "XOFF"},
79	{ &vtoggle, 1, "VTOG"},
80	{ &RefreshAddrT, 2\|RLSB, "RADD"},
81	{ &TempAddrT, 2\|RLSB, "TADD"},
82	{ &VRAMBuffer, 1, "VBUF"},
83	{ &PPUGenLatch, 1, "PGEN"},
84	};
85
86	// Is this chunk necessary? I'll fix it later.
87	//#define SFCTLRELEMENTS 2
88	//SFORMAT SFCTLR[SFCTLRELEMENTS]={
89	// { &joy_readbit, 1, "J1RB"},
90	// { &joy2_readbit, 1, "J2RB"}
91	//};
92
93	#define SFSNDELEMENTS 18
94	SFORMAT SFSND[SFSNDELEMENTS]={
95	{ &fhcnt, 4\|RLSB,"FHCN"},
96	{ &fcnt, 1, "FCNT"},
97	{ PSG, 14, "PSG"},
98	{ &PSG[0x15], 1, "P15"},
99	{ &PSG[0x17], 1, "P17"},
100	{ decvolume, 3, "DECV"},
101	{ &sqnon, 1, "SQNO"},
102	{ &nreg, 2\|RLSB, "NREG"},
103	{ &trimode, 1, "TRIM"},
104	{ &tricoop, 1, "TRIC"},
105	{ sweepon, 2, "SWEE"},
106	{ &curfreq[0], 4\|RLSB,"CRF1"},
107	{ &curfreq[1], 4\|RLSB,"CRF2"},
108	{ SweepCount, 2,"SWCT"},
109	{ DecCountTo1, 3,"DCT1"},
110	{ &PCMBitIndex, 1,"PBIN"},
111	{ &PCMAddressIndex, 4\|RLSB, "PAIN"},
112	{ &PCMSizeIndex, 4\|RLSB, "PSIN"}
113	};
114
115
116	int WriteStateChunk(FILE st, int type, SFORMAT sf, int count)
117	{
118	int bsize;
119	int x;
120
121	fputc(type,st);
122
123	for(x=bsize=0;x<count;x++)
124	bsize+=sf[x].s&(~RLSB);
125	bsize+=count<<3;
126	write32(bsize,st);
127	for(x=0;x<count;x++)
128	{
129	fwrite(sf[x].desc,1,4,st);
130	write32(sf[x].s&(~RLSB),st);
131	#ifdef LSB_FIRST
132	fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
133	#else
134	{
135	int z;
136	if(sf[x].s&RLSB)
137	{
138	for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
139	{
140	fputc((uint8)sf[x].v,st);
141	}
142	}
143	else
144	fwrite((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
145	}
146	#endif
147	}
148	return (bsize+5);
149	}
150
151	int ReadStateChunk(FILE st, SFORMAT sf, int count, int size)
152	{
153	uint8 tmpyo[16];
154	int bsize;
155	int x;
156
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)))
192	goto nkayo;
193	#ifndef LSB_FIRST
194	if(sf[x].s&RLSB)
195	{
196	int z;
197	for(z=(sf[x].s&(~RLSB))-1;z>=0;z--)
198	(uint8)sf[x].v=fgetc(st);
199	}
200	else
201	#endif
202	{
203	fread((uint8 *)sf[x].v,1,sf[x].s&(~RLSB),st);
204	}
205	goto bloo;
206	}
207	}
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
244	int ReadStateChunks(FILE *st)
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;
255	switch(t)
256	{
257	case 1:if(!ReadStateChunk(st,SFCPU,SFCPUELEMENTS,size)) ret=0;break;
258	case 2:if(!ReadStateChunk(st,SFCPUC,SFCPUCELEMENTS,size)) ret=0;
259	else
260	{
261	X.mooPI=X.P; // Quick and dirty hack.
262	}
263	break;
264	case 3:if(!ReadStateChunk(st,SFPPU,SFPPUELEMENTS,size)) ret=0;break;
265	// case 4:if(!ReadStateChunk(st,SFCTLR,SFCTLRELEMENTS,size)) ret=0;break;
266	case 5:if(!ReadStateChunk(st,SFSND,SFSNDELEMENTS,size)) ret=0;break;
267	case 0x10:if(!ReadStateChunk(st,SFMDATA,SFEXINDEX,size)) ret=0;break;
268	default: if(fseek(st,size,SEEK_CUR)<0) goto endo;break;
269	}
270	}
271	endo:
272	return ret;
273	}
274
275
276	int CurrentState=0;
277	extern int geniestage;
278	void SaveState(void)
279	{
280	FILE *st=NULL;
281
282	TempAddrT=TempAddr;
283	RefreshAddrT=RefreshAddr;
284
285	if(geniestage==1)
286	{
287	FCEU_DispMessage("Cannot save FCS in GG screen.");
288	return;
289	}
290
291	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"wb");
292
293	if(st!=NULL)
294	{
295	static uint32 totalsize;
296	static uint8 header[16]="FCS";
297	memset(header+4,0,13);
298	header[3]=VERSION_NUMERIC;
299	fwrite(header,1,16,st);
300
301	totalsize=WriteStateChunk(st,1,SFCPU,SFCPUELEMENTS);
302	totalsize+=WriteStateChunk(st,2,SFCPUC,SFCPUCELEMENTS);
303	totalsize+=WriteStateChunk(st,3,SFPPU,SFPPUELEMENTS);
304	// totalsize+=WriteStateChunk(st,4,SFCTLR,SFCTLRELEMENTS);
305	totalsize+=WriteStateChunk(st,5,SFSND,SFSNDELEMENTS);
306	totalsize+=WriteStateChunk(st,0x10,SFMDATA,SFEXINDEX);
307
308	fseek(st,4,SEEK_SET);
309	write32(totalsize,st);
310	SaveStateStatus[CurrentState]=1;
311	fclose(st);
312	FCEU_DispMessage("State %d saved.",CurrentState);
313	}
314	else
315	FCEU_DispMessage("State %d save error.",CurrentState);
316	}
317
318	static int LoadStateOld(FILE *st);
319	void LoadState(void)
320	{
321	int x;
322	FILE *st=NULL;
323
324	if(geniestage==1)
325	{
326	FCEU_DispMessage("Cannot load FCS in GG screen.");
327	return;
328	}
329
330	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0),"rb");
331
332	if(st!=NULL)
333	{
334	uint8 header[16];
335
336	fread(&header,1,16,st);
337	if(memcmp(header,"FCS",3))
338	{
339	fseek(st,0,SEEK_SET);
340	if(!LoadStateOld(st))
341	goto lerror;
342	goto okload;
343	}
344	stateversion=header[3];
345	if(stateversion<53)
346	FixOldSaveStateSFreq();
347	x=ReadStateChunks(st);
348	if(GameStateRestore) GameStateRestore(header[3]);
349	if(x)
350	{
351	okload:
352	TempAddr=TempAddrT;
353	RefreshAddr=RefreshAddrT;
354
355	SaveStateStatus[CurrentState]=1;
356	FCEU_DispMessage("State %d loaded.",CurrentState);
357	SaveStateStatus[CurrentState]=1;
358	}
359	else
360	{
361	SaveStateStatus[CurrentState]=1;
362	FCEU_DispMessage("Error(s) reading state %d!",CurrentState);
363	}
364	}
365	else
366	{
367	lerror:
368	FCEU_DispMessage("State %d load error.",CurrentState);
369	SaveStateStatus[CurrentState]=0;
370	return;
371	}
372	fclose(st);
373	}
374
375	char SaveStateStatus[10];
376	void CheckStates(void)
377	{
378	FILE *st=NULL;
379	int ssel;
380
381	if(SaveStateStatus[0]==-1)
382	for(ssel=0;ssel<10;ssel++)
383	{
384	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,ssel,0),"rb");
385	if(st)
386	{
387	SaveStateStatus[ssel]=1;
388	fclose(st);
389	}
390	else
391	SaveStateStatus[ssel]=0;
392	}
393	}
394
395	void SaveStateRefresh(void)
396	{
397	SaveStateStatus[0]=-1;
398	}
399
400	void ResetExState(void)
401	{
402	int x;
403	for(x=0;x<SFEXINDEX;x++)
404	free(SFMDATA[x].desc);
405	SFEXINDEX=0;
406	}
407
408	void AddExState(void v, uint32 s, int type, char desc)
409	{
410	SFMDATA[SFEXINDEX].desc=FCEU_malloc(5);
411	if(SFMDATA[SFEXINDEX].desc)
412	{
413	strcpy(SFMDATA[SFEXINDEX].desc,desc);
414	SFMDATA[SFEXINDEX].v=v;
415	SFMDATA[SFEXINDEX].s=s;
416	if(type) SFMDATA[SFEXINDEX].s\|=RLSB;
417	if(SFEXINDEX<63) SFEXINDEX++;
418	}
419	}
420
421	/* Old state loading code follows */
422
423	uint8 *StateBuffer;
424	unsigned int intostate;
425
426	static void afread(void *ptr, size_t _size, size_t _nelem)
427	{
428	memcpy(ptr,StateBuffer+intostate,_size*_nelem);
429	intostate+=_size*_nelem;
430	}
431
432
433	static void areadlower8of16(int8 *d)
434	{
435	#ifdef LSB_FIRST
436	*d=StateBuffer[intostate++];
437	#else
438	d[1]=StateBuffer[intostate++];
439	#endif
440	}
441
442
443	static void areadupper8of16(int8 *d)
444	{
445	#ifdef LSB_FIRST
446	d[1]=StateBuffer[intostate++];
447	#else
448	*d=StateBuffer[intostate++];
449	#endif
450	}
451
452
453	static void aread16(int8 *d)
454	{
455	#ifdef LSB_FIRST
456	*d=StateBuffer[intostate++];
457	d[1]=StateBuffer[intostate++];
458	#else
459	d[1]=StateBuffer[intostate++];
460	*d=StateBuffer[intostate++];
461	#endif
462	}
463
464
465	static void aread32(int8 *d)
466	{
467	#ifdef LSB_FIRST
468	*d=StateBuffer[intostate++];
469	d[1]=StateBuffer[intostate++];
470	d[2]=StateBuffer[intostate++];
471	d[3]=StateBuffer[intostate++];
472	#else
473	d[3]=StateBuffer[intostate++];
474	d[2]=StateBuffer[intostate++];
475	d[1]=StateBuffer[intostate++];
476	*d=StateBuffer[intostate++];
477	#endif
478	}
479
480	static int LoadStateOld(FILE *st)
481	{
482	int x;
483	int32 nada;
484	uint8 version;
485	nada=0;
486
487	StateBuffer=FCEU_malloc(59999);
488	if(StateBuffer==NULL)
489	return 0;
490	if(!fread(StateBuffer,59999,1,st))
491	{
492	fclose(st);
493	free(StateBuffer);
494	return 0;
495	}
496
497	intostate=0;
498
499	{
500	uint8 a[2];
501	afread(&a[0],1,1);
502	afread(&a[1],1,1);
503	X.PC=a[0]\|(a[1]<<8);
504	}
505	afread(&X.A,1,1);
506	afread(&X.P,1,1);
507	afread(&X.X,1,1);
508	afread(&X.Y,1,1);
509	afread(&X.S,1,1);
510	afread(&version,1,1);
511	afread(&nada,1,1);
512	afread(&nada,1,1);
513	afread(&nada,1,1);
514	afread(&nada,1,1);
515	aread32((int8 *)&X.count);
516	afread(&nada,1,1);
517	afread(&nada,1,1);
518	afread(&nada,1,1);
519	afread(&nada,1,1);
520	aread32((int8 *)&nada);
521	afread(&nada,1,1);
522	afread(&nada,1,1);
523	afread(&nada,1,1);
524	afread(&nada,1,1);
525
526	for(x=0;x<8;x++)
527	areadupper8of16((int8 *)&CHRBankList[x]);
528	afread(PRGBankList,4,1);
529	for(x=0;x<8;x++)
530	areadlower8of16((int8 *)&CHRBankList[x]);
531	afread(CHRRAM,1,0x2000);
532	afread(NTARAM,1,0x400);
533	afread(ExtraNTARAM,1,0x400);
534	afread(NTARAM+0x400,1,0x400);
535	afread(ExtraNTARAM+0x400,1,0x400);
536
537	for(x=0;x<0xF00;x++)
538	afread(&nada,1,1);
539	afread(PALRAM,1,0x20);
540	for(x=0;x<256-32;x++)
541	afread(&nada,1,1);
542	for(x=0x00;x<0x20;x++)
543	PALRAM[x]&=0x3f;
544	afread(PPU,1,4);
545	afread(SPRAM,1,0x100);
546	afread(WRAM,1,8192);
547	afread(RAM,1,0x800);
548	aread16((int8 *)&scanline);
549	aread16((int8 *)&RefreshAddr);
550	afread(&VRAMBuffer,1,1);
551
552	afread(&IRQa,1,1);
553	aread32((int8 *)&IRQCount);
554	aread32((int8 *)&IRQLatch);
555	afread(&Mirroring,1,1);
556	afread(PSG,1,0x17);
557	PSG[0x11]&=0x7F;
558	afread(MapperExRAM,1,193);
559	if(version>=31)
560	PSG[0x17]=MapperExRAM[115];
561	else
562	PSG[0x17]\|=0x40;
563	PSG[0x15]&=0xF;
564	sqnon=PSG[0x15];
565
566	X.IRQlow=0;
567	afread(&nada,1,1);
568	afread(&nada,1,1);
569	afread(&nada,1,1);
570	afread(&nada,1,1);
571	afread(&nada,1,1);
572	afread(&nada,1,1);
573	afread(&XOffset,1,1);
574	PPUCHRRAM=0;
575	for(x=0;x<8;x++)
576	{
577	nada=0;
578	afread(&nada,1,1);
579	PPUCHRRAM\|=(nada?1:0)<<x;
580	}
581
582	afread(mapbyte1,1,8);
583	afread(mapbyte2,1,8);
584	afread(mapbyte3,1,8);
585	afread(mapbyte4,1,8);
586	for(x=0;x<4;x++)
587	aread16((int8 *)&nada);
588
589	PPUNTARAM=0;
590	for(x=0;x<4;x++)
591	{
592	nada=0;
593	aread16((int8 *)&nada);
594	PPUNTARAM\|=((nada&0x800)?0:1)<<x;
595	}
596	afread(MapperExRAM,1,32768);
597	afread(&vtoggle,1,1);
598	aread16((int8 *)&TempAddrT);
599	aread16((int8 *)&RefreshAddrT);
600
601	if(GameStateRestore) GameStateRestore(version);
602	free(StateBuffer);
603	FixOldSaveStateSFreq();
604	X.mooPI=X.P;
605	return 1;
606	}
607