[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 FCEUSND_STATEINFO[];
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;


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,FCEUSND_STATEINFO,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:
 if(ret)
  FCEUSND_LoadState(stateversion);
 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
	  FCEUSND_SaveState();
	  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,FCEUSND_STATEINFO);


	  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
5bd16b94	55	extern SFORMAT FCEUSND_STATEINFO[];
890e37ba	56	extern SFORMAT FCEUCTRL_STATEINFO[]; // 4
c62d2810	57
890e37ba	58	SFORMAT SFCPU[]={ // 1
c62d2810	59	{ &X.PC, 2\|RLSB, "PC\0"},
	60	{ &X.A, 1, "A\0\0"},
	61	{ &X.P, 1, "P\0\0"},
	62	{ &X.X, 1, "X\0\0"},
	63	{ &X.Y, 1, "Y\0\0"},
	64	{ &X.S, 1, "S\0\0"},
890e37ba	65	{ RAM, 0x800, "RAM"},
890e37ba	66	{ 0, }
c62d2810	67	};
c62d2810	68
890e37ba	69	SFORMAT SFCPUC[]={ // 2
c62d2810	70	{ &X.jammed, 1, "JAMM"},
	71	{ &X.IRQlow, 1, "IRQL"},
	72	{ &X.tcount, 4\|RLSB, "ICoa"},
	73	{ &X.count, 4\|RLSB, "ICou"},
	74	{ &timestamp, 4\|RLSB, "TIME"},
890e37ba	75	{ &timestampbase, 8\|RLSB, "TMEB"},
	76	// from 0.98.15
	77	{ &timestampbase, sizeof(timestampbase) \| RLSB, "TSBS"}, // size seems to match?
	78	{ &X.mooPI, 1, "MooP"}, // alternative to the "quick and dirty hack"
	79	// TODO: IQLB?
	80	{ 0, }
c62d2810	81	};
c62d2810	82
890e37ba	83	extern uint16 TempAddrT,RefreshAddrT;
c62d2810	84
c62d2810	85
0bb3fe12	86	static int SubWrite(FILE st, SFORMAT sf)
c62d2810	87	{
0bb3fe12	88	uint32 acc=0;
c62d2810	89
0bb3fe12	90	while(sf->v)
	91	{
	92	if(sf->s==~0) /* Link to another struct. */
	93	{
	94	uint32 tmp;
	95
	96	if(!(tmp=SubWrite(st,(SFORMAT *)sf->v)))
	97	return(0);
	98	acc+=tmp;
	99	sf++;
	100	continue;
	101	}
	102
	103	acc+=8; /* Description + size */
	104	acc+=sf->s&(~RLSB);
	105
	106	if(st) /* Are we writing or calculating the size of this block? */
	107	{
	108	fwrite(sf->desc,1,4,st);
	109	write32le(sf->s&(~RLSB),st);
	110
	111	#ifndef LSB_FIRST
	112	if(sf->s&RLSB)
	113	FlipByteOrder(sf->v,sf->s&(~RLSB));
	114	#endif
	115
	116	fwrite((uint8 *)sf->v,1,sf->s&(~RLSB),st);
	117	/* Now restore the original byte order. */
	118	#ifndef LSB_FIRST
	119	if(sf->s&RLSB)
	120	FlipByteOrder(sf->v,sf->s&(~RLSB));
	121	#endif
	122	}
	123	sf++;
	124	}
	125
	126	return(acc);
	127	}
	128
	129	static int WriteStateChunk(FILE st, int type, SFORMAT sf)
	130	{
	131	int bsize;
890e37ba	132
c62d2810	133	fputc(type,st);
22f08d95	134
0bb3fe12	135	bsize=SubWrite(0,sf);
	136	write32le(bsize,st);
	137
	138	if(!SubWrite(st,sf))
	139	{
	140	return(0);
	141	}
	142	return (bsize+5);
	143	}
	144
	145	static SFORMAT CheckS(SFORMAT sf, uint32 tsize, char *desc)
	146	{
	147	while(sf->v)
c62d2810	148	{
0bb3fe12	149	if(sf->s==~0) /* Link to another SFORMAT structure. */
c62d2810	150	{
0bb3fe12	151	SFORMAT *tmp;
	152	if((tmp= CheckS((SFORMAT *)sf->v, tsize, desc) ))
	153	return(tmp);
	154	sf++;
	155	continue;
	156	}
	157	if(!memcmp(desc,sf->desc,4))
c62d2810	158	{
0bb3fe12	159	if(tsize!=(sf->s&(~RLSB)))
c62d2810	160	{
0bb3fe12	161	printf("ReadStateChunk: sect \"%c%c%c%c\" has wrong size\n", desc[0], desc[1], desc[2], desc[3]);
0bb3fe12	162	return(0);
c62d2810	163	}
0bb3fe12	164	return(sf);
c62d2810	165	}
0bb3fe12	166	sf++;
c62d2810	167	}
0bb3fe12	168	return(0);
c62d2810	169	}
c62d2810	170
0bb3fe12	171	static int ReadStateChunk(FILE st, SFORMAT sf, int size)
c62d2810	172	{
0bb3fe12	173	//if(scan_chunks)
0bb3fe12	174	// return fseek(st,size,SEEK_CUR) == 0;
c62d2810	175
0bb3fe12	176	SFORMAT *tmp;
	177	int temp;
	178	temp=ftell(st);
890e37ba	179
0bb3fe12	180	while(ftell(st)<temp+size)
c62d2810	181	{
0bb3fe12	182	uint32 tsize;
	183	char toa[4];
	184	if(fread(toa,1,4,st)<=0)
c62d2810	185	return 0;
c62d2810	186
0bb3fe12	187	read32le(&tsize,st);
c62d2810	188
0bb3fe12	189	if((tmp=CheckS(sf,tsize,toa)))
c62d2810	190	{
0bb3fe12	191	fread((uint8 *)tmp->v,1,tmp->s&(~RLSB),st);
c62d2810	192
0bb3fe12	193	#ifndef LSB_FIRST
	194	if(tmp->s&RLSB)
	195	FlipByteOrder(tmp->v,tmp->s&(~RLSB));
c62d2810	196	#endif
c62d2810	197	}
0bb3fe12	198	else
	199	{
	200	fseek(st,tsize,SEEK_CUR);
	201	printf("ReadStateChunk: sect \"%c%c%c%c\" not handled\n", toa[0], toa[1], toa[2], toa[3]);
	202	}
	203	} // while(...)
c62d2810	204	return 1;
	205	}
	206
0bb3fe12	207
890e37ba	208	static int ReadStateChunks(FILE *st)
c62d2810	209	{
	210	int t;
	211	uint32 size;
	212	int ret=1;
	213
	214	for(;;)
	215	{
	216	t=fgetc(st);
	217	if(t==EOF) break;
	218	if(!read32(&size,st)) break;
890e37ba	219
890e37ba	220	// printf("ReadStateChunks: chunk %i\n", t);
c62d2810	221	switch(t)
c62d2810	222	{
890e37ba	223	case 1:if(!ReadStateChunk(st,SFCPU,size)) ret=0;
92e249b1	224	#ifdef ASM_6502
	225	asmcpu_unpack();
	226	#endif
	227	break;
890e37ba	228	case 2:if(!ReadStateChunk(st,SFCPUC,size)) ret=0;
c62d2810	229	else
	230	{
	231	X.mooPI=X.P; // Quick and dirty hack.
	232	}
	233	break;
890e37ba	234	case 3:if(!ReadStateChunk(st,FCEUPPU_STATEINFO,size)) ret=0;break;
890e37ba	235	case 4:if(!ReadStateChunk(st,FCEUCTRL_STATEINFO,size)) ret=0;break;
5bd16b94	236	case 5:if(!ReadStateChunk(st,FCEUSND_STATEINFO,size)) ret=0;break;
890e37ba	237	case 0x10:if(!ReadStateChunk(st,SFMDATA,size)) ret=0;break;
	238	default:printf("ReadStateChunks: unknown chunk: %i\n", t);
	239	if(fseek(st,size,SEEK_CUR)<0) goto endo;break;
c62d2810	240	}
	241	}
	242	endo:
5bd16b94	243	if(ret)
5bd16b94	244	FCEUSND_LoadState(stateversion);
c62d2810	245	return ret;
	246	}
	247
	248
	249	int CurrentState=0;
	250	extern int geniestage;
	251	void SaveState(void)
	252	{
	253	FILE *st=NULL;
971a1d07	254	char *fname;
c62d2810	255
	256	TempAddrT=TempAddr;
	257	RefreshAddrT=RefreshAddr;
	258
	259	if(geniestage==1)
	260	{
	261	FCEU_DispMessage("Cannot save FCS in GG screen.");
	262	return;
	263	}
	264
971a1d07	265	fname = FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0);
	266	st=fopen(fname,"wb");
	267	free(fname);
c62d2810	268
	269	if(st!=NULL)
	270	{
ed531dd6	271	uint32 totalsize;
	272	uint8 header[16]="FCS";
	273	memset(header+4,0,sizeof(header)-4);
c62d2810	274	header[3]=VERSION_NUMERIC;
	275	fwrite(header,1,16,st);
	276
92e249b1	277	#ifdef ASM_6502
	278	asmcpu_pack();
	279	#endif
5bd16b94	280	FCEUSND_SaveState();
890e37ba	281	totalsize=WriteStateChunk(st,1,SFCPU);
	282	totalsize+=WriteStateChunk(st,2,SFCPUC);
	283	totalsize+=WriteStateChunk(st,3,FCEUPPU_STATEINFO);
	284	totalsize+=WriteStateChunk(st,4,FCEUCTRL_STATEINFO);
5bd16b94	285	totalsize+=WriteStateChunk(st,5,FCEUSND_STATEINFO);
d97315ac	286
	287
	288	if(SPreSave) SPreSave();
890e37ba	289	totalsize+=WriteStateChunk(st,0x10,SFMDATA);
d97315ac	290	if(SPostSave) SPostSave();
22f08d95	291
c62d2810	292	fseek(st,4,SEEK_SET);
	293	write32(totalsize,st);
	294	SaveStateStatus[CurrentState]=1;
	295	fclose(st);
92e249b1	296	#ifdef GP2X
	297	sync();
	298	#endif
c62d2810	299	FCEU_DispMessage("State %d saved.",CurrentState);
	300	}
	301	else
	302	FCEU_DispMessage("State %d save error.",CurrentState);
	303	}
	304
	305	static int LoadStateOld(FILE *st);
5a2aa426	306	int FCEUSS_LoadFP(FILE *st, int make_backup)
c62d2810	307	{
c62d2810	308	int x;
c62d2810	309	if(st!=NULL)
	310	{
	311	uint8 header[16];
	312
	313	fread(&header,1,16,st);
	314	if(memcmp(header,"FCS",3))
	315	{
22f08d95	316	fseek(st,0,SEEK_SET);
c62d2810	317	if(!LoadStateOld(st))
	318	goto lerror;
	319	goto okload;
	320	}
	321	stateversion=header[3];
	322	if(stateversion<53)
	323	FixOldSaveStateSFreq();
	324	x=ReadStateChunks(st);
	325	if(GameStateRestore) GameStateRestore(header[3]);
	326	if(x)
	327	{
	328	okload:
	329	TempAddr=TempAddrT;
	330	RefreshAddr=RefreshAddrT;
	331
	332	SaveStateStatus[CurrentState]=1;
	333	FCEU_DispMessage("State %d loaded.",CurrentState);
	334	SaveStateStatus[CurrentState]=1;
	335	}
	336	else
	337	{
	338	SaveStateStatus[CurrentState]=1;
	339	FCEU_DispMessage("Error(s) reading state %d!",CurrentState);
	340	}
	341	}
	342	else
	343	{
	344	lerror:
	345	FCEU_DispMessage("State %d load error.",CurrentState);
	346	SaveStateStatus[CurrentState]=0;
5a2aa426	347	return 0;
	348	}
	349	return 1;
	350	}
	351
	352	void LoadState(void)
	353	{
	354	FILE *st=NULL;
971a1d07	355	char *fname;
5a2aa426	356
	357	if(geniestage==1)
	358	{
	359	FCEU_DispMessage("Cannot load FCS in GG screen.");
	360	return;
	361	}
	362
971a1d07	363	fname = FCEU_MakeFName(FCEUMKF_STATE,CurrentState,0);
	364	st=fopen(fname,"rb");
	365	free(fname);
	366
5a2aa426	367	if (st)
	368	{
	369	FCEUSS_LoadFP(st, 0);
	370	fclose(st);
c62d2810	371	}
971a1d07	372	else
	373	{
	374	FCEU_DispMessage("State %d load error (no file).",CurrentState);
	375	SaveStateStatus[CurrentState]=0;
	376	}
c62d2810	377	}
	378
	379	char SaveStateStatus[10];
971a1d07	380	#if 0 // leaks memory
c62d2810	381	void CheckStates(void)
	382	{
	383	FILE *st=NULL;
	384	int ssel;
	385
22f08d95	386	if(SaveStateStatus[0]==(char)-1)
c62d2810	387	for(ssel=0;ssel<10;ssel++)
	388	{
	389	st=fopen(FCEU_MakeFName(FCEUMKF_STATE,ssel,0),"rb");
	390	if(st)
	391	{
	392	SaveStateStatus[ssel]=1;
	393	fclose(st);
	394	}
	395	else
	396	SaveStateStatus[ssel]=0;
	397	}
	398	}
971a1d07	399	#endif
c62d2810	400
	401	void SaveStateRefresh(void)
	402	{
	403	SaveStateStatus[0]=-1;
	404	}
	405
d97315ac	406	void ResetExState(void (PreSave)(void), void (PostSave)(void))
c62d2810	407	{
	408	int x;
	409	for(x=0;x<SFEXINDEX;x++)
d97315ac	410	{
	411	if(SFMDATA[x].desc)
	412	free(SFMDATA[x].desc);
	413	}
	414	SPreSave = PreSave;
	415	SPostSave = PostSave;
c62d2810	416	SFEXINDEX=0;
	417	}
	418
d97315ac	419
c62d2810	420	void AddExState(void v, uint32 s, int type, char desc)
c62d2810	421	{
d97315ac	422	if(desc)
c62d2810	423	{
d97315ac	424	SFMDATA[SFEXINDEX].desc=(char *)FCEU_malloc(5);
c62d2810	425	strcpy(SFMDATA[SFEXINDEX].desc,desc);
c62d2810	426	}
d97315ac	427	else
0bb3fe12	428	SFMDATA[SFEXINDEX].desc=0;
d97315ac	429	SFMDATA[SFEXINDEX].v=v;
	430	SFMDATA[SFEXINDEX].s=s;
	431	if(type) SFMDATA[SFEXINDEX].s\|=RLSB;
	432	if(SFEXINDEX<SFMDATA_SIZE-1)
	433	SFEXINDEX++;
	434	else
	435	{
	436	static int once=1;
	437	if(once)
	438	{
	439	once=0;
	440	FCEU_PrintError("Error in AddExState: SFEXINDEX overflow.\nSomebody made SFMDATA_SIZE too small.");
	441	}
	442	}
	443	SFMDATA[SFEXINDEX].v=0; // End marker.
c62d2810	444	}
c62d2810	445
d97315ac	446
c62d2810	447	/* Old state loading code follows */
	448
	449	uint8 *StateBuffer;
	450	unsigned int intostate;
	451
	452	static void afread(void *ptr, size_t _size, size_t _nelem)
	453	{
	454	memcpy(ptr,StateBuffer+intostate,_size*_nelem);
	455	intostate+=_size*_nelem;
	456	}
	457
	458
	459	static void areadlower8of16(int8 *d)
	460	{
	461	#ifdef LSB_FIRST
	462	*d=StateBuffer[intostate++];
	463	#else
	464	d[1]=StateBuffer[intostate++];
	465	#endif
	466	}
	467
	468
	469	static void areadupper8of16(int8 *d)
	470	{
	471	#ifdef LSB_FIRST
	472	d[1]=StateBuffer[intostate++];
	473	#else
	474	*d=StateBuffer[intostate++];
	475	#endif
	476	}
	477
	478
	479	static void aread16(int8 *d)
	480	{
	481	#ifdef LSB_FIRST
	482	*d=StateBuffer[intostate++];
	483	d[1]=StateBuffer[intostate++];
	484	#else
	485	d[1]=StateBuffer[intostate++];
	486	*d=StateBuffer[intostate++];
	487	#endif
	488	}
	489
	490
	491	static void aread32(int8 *d)
	492	{
	493	#ifdef LSB_FIRST
	494	*d=StateBuffer[intostate++];
	495	d[1]=StateBuffer[intostate++];
	496	d[2]=StateBuffer[intostate++];
	497	d[3]=StateBuffer[intostate++];
	498	#else
	499	d[3]=StateBuffer[intostate++];
	500	d[2]=StateBuffer[intostate++];
	501	d[1]=StateBuffer[intostate++];
	502	*d=StateBuffer[intostate++];
	503	#endif
	504	}
	505
	506	static int LoadStateOld(FILE *st)
	507	{
	508	int x;
	509	int32 nada;
	510	uint8 version;
511	nada=0;
22f08d95	512
890e37ba	513	printf("LoadStateOld\n");
890e37ba	514
c62d2810	515	StateBuffer=FCEU_malloc(59999);
	516	if(StateBuffer==NULL)
	517	return 0;
	518	if(!fread(StateBuffer,59999,1,st))
	519	{
	520	fclose(st);
	521	free(StateBuffer);
	522	return 0;
	523	}
	524
	525	intostate=0;
	526
	527	{
	528	uint8 a[2];
	529	afread(&a[0],1,1);
	530	afread(&a[1],1,1);
	531	X.PC=a[0]\|(a[1]<<8);
	532	}
	533	afread(&X.A,1,1);
	534	afread(&X.P,1,1);
	535	afread(&X.X,1,1);
	536	afread(&X.Y,1,1);
	537	afread(&X.S,1,1);
	538	afread(&version,1,1);
	539	afread(&nada,1,1);
	540	afread(&nada,1,1);
	541	afread(&nada,1,1);
	542	afread(&nada,1,1);
	543	aread32((int8 *)&X.count);
	544	afread(&nada,1,1);
	545	afread(&nada,1,1);
	546	afread(&nada,1,1);
	547	afread(&nada,1,1);
	548	aread32((int8 *)&nada);
	549	afread(&nada,1,1);
	550	afread(&nada,1,1);
	551	afread(&nada,1,1);
	552	afread(&nada,1,1);
22f08d95	553
c62d2810	554	for(x=0;x<8;x++)
	555	areadupper8of16((int8 *)&CHRBankList[x]);
	556	afread(PRGBankList,4,1);
	557	for(x=0;x<8;x++)
	558	areadlower8of16((int8 *)&CHRBankList[x]);
	559	afread(CHRRAM,1,0x2000);
	560	afread(NTARAM,1,0x400);
	561	afread(ExtraNTARAM,1,0x400);
	562	afread(NTARAM+0x400,1,0x400);
	563	afread(ExtraNTARAM+0x400,1,0x400);
	564
	565	for(x=0;x<0xF00;x++)
	566	afread(&nada,1,1);
	567	afread(PALRAM,1,0x20);
	568	for(x=0;x<256-32;x++)
	569	afread(&nada,1,1);
	570	for(x=0x00;x<0x20;x++)
	571	PALRAM[x]&=0x3f;
	572	afread(PPU,1,4);
	573	afread(SPRAM,1,0x100);
	574	afread(WRAM,1,8192);
	575	afread(RAM,1,0x800);
	576	aread16((int8 *)&scanline);
	577	aread16((int8 *)&RefreshAddr);
	578	afread(&VRAMBuffer,1,1);
22f08d95	579
c62d2810	580	afread(&IRQa,1,1);
	581	aread32((int8 *)&IRQCount);
	582	aread32((int8 *)&IRQLatch);
	583	afread(&Mirroring,1,1);
	584	afread(PSG,1,0x17);
	585	PSG[0x11]&=0x7F;
	586	afread(MapperExRAM,1,193);
	587	if(version>=31)
	588	PSG[0x17]=MapperExRAM[115];
	589	else
	590	PSG[0x17]\|=0x40;
	591	PSG[0x15]&=0xF;
	592	sqnon=PSG[0x15];
	593
	594	X.IRQlow=0;
	595	afread(&nada,1,1);
	596	afread(&nada,1,1);
	597	afread(&nada,1,1);
	598	afread(&nada,1,1);
	599	afread(&nada,1,1);
	600	afread(&nada,1,1);
	601	afread(&XOffset,1,1);
	602	PPUCHRRAM=0;
	603	for(x=0;x<8;x++)
	604	{
	605	nada=0;
	606	afread(&nada,1,1);
22f08d95	607	PPUCHRRAM\|=(nada?1:0)<<x;
c62d2810	608	}
22f08d95	609
c62d2810	610	afread(mapbyte1,1,8);
	611	afread(mapbyte2,1,8);
	612	afread(mapbyte3,1,8);
	613	afread(mapbyte4,1,8);
	614	for(x=0;x<4;x++)
	615	aread16((int8 *)&nada);
22f08d95	616
c62d2810	617	PPUNTARAM=0;
	618	for(x=0;x<4;x++)
	619	{
	620	nada=0;
	621	aread16((int8 *)&nada);
	622	PPUNTARAM\|=((nada&0x800)?0:1)<<x;
	623	}
	624	afread(MapperExRAM,1,32768);
	625	afread(&vtoggle,1,1);
	626	aread16((int8 *)&TempAddrT);
	627	aread16((int8 *)&RefreshAddrT);
22f08d95	628
c62d2810	629	if(GameStateRestore) GameStateRestore(version);
	630	free(StateBuffer);
	631	FixOldSaveStateSFreq();
	632	X.mooPI=X.P;
	633	return 1;
	634	}
	635