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fceux/src/file.cpp

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/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2002 Xodnizel
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fstream>
#ifndef WIN32
#include <zlib.h>
#endif
#include "types.h"
#include "file.h"
#include "utils/endian.h"
#include "utils/memory.h"
#include "utils/md5.h"
#include "utils/unzip.h"
#include "driver.h"
#include "types.h"
#include "fceu.h"
#include "state.h"
#include "movie.h"
#include "driver.h"
#include "utils/xstring.h"
using namespace std;
bool bindSavestate = true; //Toggle that determines if a savestate filename will include the movie filename
static std::string BaseDirectory;
static char FileExt[2048]; //Includes the . character, as in ".nes"
char FileBase[2048];
static char FileBaseDirectory[2048];
void ApplyIPS(FILE *ips, FCEUFILE* fp)
{
uint8 header[5];
uint32 count=0;
if(!ips) return;
char* buf = (char*)FCEU_dmalloc(fp->size);
memcpy(buf,fp->EnsureMemorystream()->buf(),fp->size);
FCEU_printf(" Applying IPS...\n");
if(fread(header,1,5,ips)!=5)
{
goto end;
}
if(memcmp(header,"PATCH",5))
{
goto end;
}
while(fread(header,1,3,ips)==3)
{
uint32 offset=(header[0]<<16)|(header[1]<<8)|header[2];
uint16 size;
if(!memcmp(header,"EOF",3))
{
FCEU_printf(" IPS EOF: Did %d patches\n\n",count);
goto end;
}
size=fgetc(ips)<<8;
size|=fgetc(ips);
if(!size) /* RLE */
{
char *start;
char b;
size=fgetc(ips)<<8;
size|=fgetc(ips);
//FCEU_printf(" Offset: %8d Size: %5d RLE\n",offset,size);
if((offset+size)>(uint32)fp->size)
{
// Probably a little slow.
buf=(char *)realloc(buf,offset+size);
if(!buf)
{
FCEU_printf(" Oops. IPS patch %d(type RLE) goes beyond end of file. Could not allocate memory.\n",count);
goto end;
}
memset(buf+fp->size,0,offset+size-fp->size);
fp->size=offset+size;
}
b=fgetc(ips);
start=buf+offset;
do
{
*start=b;
start++;
} while(--size);
}
else /* Normal patch */
{
//FCEU_printf(" Offset: %8d Size: %5d\n",offset,size);
if((offset+size)>(uint32)fp->size)
{
// Probably a little slow.
buf=(char *)realloc(buf,offset+size);
if(!buf)
{
FCEU_printf(" Oops. IPS patch %d(type normal) goes beyond end of file. Could not allocate memory.\n",count);
goto end;
}
memset(buf+fp->size,0,offset+size-fp->size);
}
fread(buf+offset,1,size,ips);
}
count++;
}
FCEU_printf(" Hard IPS end!\n");
end:
fclose(ips);
EMUFILE_MEMORY* ms = new EMUFILE_MEMORY(buf,fp->size);
fp->SetStream(ms);
}
std::string FCEU_MakeIpsFilename(FileBaseInfo fbi) {
char ret[FILENAME_MAX] = "";
sprintf(ret,"%s"PSS"%s%s.ips",fbi.filebasedirectory.c_str(),fbi.filebase.c_str(),fbi.ext.c_str());
return ret;
}
void FCEU_SplitArchiveFilename(std::string src, std::string& archive, std::string& file, std::string& fileToOpen)
{
size_t pipe = src.find_first_of('|');
if(pipe == std::string::npos)
{
archive = "";
file = src;
fileToOpen = src;
}
else
{
archive = src.substr(0,pipe);
file = src.substr(pipe+1);
fileToOpen = archive;
}
}
FileBaseInfo CurrentFileBase() {
return FileBaseInfo(FileBaseDirectory,FileBase,FileExt);
}
FileBaseInfo DetermineFileBase(const char *f) {
char drv[PATH_MAX], dir[PATH_MAX], name[PATH_MAX], ext[PATH_MAX];
splitpath(f,drv,dir,name,ext);
if(dir[0] == 0) strcpy(dir,".");
return FileBaseInfo((std::string)drv + dir,name,ext);
}
inline FileBaseInfo DetermineFileBase(const std::string& str) { return DetermineFileBase(str.c_str()); }
static FCEUFILE * TryUnzip(const std::string& path) {
unzFile tz;
if((tz=unzOpen(path.c_str()))) // If it's not a zip file, use regular file handlers.
// Assuming file type by extension usually works,
// but I don't like it. :)
{
if(unzGoToFirstFile(tz)==UNZ_OK)
{
for(;;)
{
char tempu[512]; // Longer filenames might be possible, but I don't
// think people would name files that long in zip files...
unzGetCurrentFileInfo(tz,0,tempu,512,0,0,0,0);
tempu[511]=0;
if(strlen(tempu)>=4)
{
char *za=tempu+strlen(tempu)-4;
//if(!ext)
{
if(!strcasecmp(za,".nes") || !strcasecmp(za,".fds") ||
!strcasecmp(za,".nsf") || !strcasecmp(za,".unf") ||
!strcasecmp(za,".nez"))
break;
}
//else if(!strcasecmp(za,ext))
// break;
}
if(strlen(tempu)>=5)
{
if(!strcasecmp(tempu+strlen(tempu)-5,".unif"))
break;
}
if(unzGoToNextFile(tz)!=UNZ_OK)
{
if(unzGoToFirstFile(tz)!=UNZ_OK) goto zpfail;
unzCloseCurrentFile(tz);
unzClose(tz);
return 0;
}
}
if(unzOpenCurrentFile(tz)!=UNZ_OK)
goto zpfail;
}
else
{
zpfail:
unzClose(tz);
return 0;
}
unz_file_info ufo;
unzGetCurrentFileInfo(tz,&ufo,0,0,0,0,0,0);
int size = ufo.uncompressed_size;
EMUFILE_MEMORY* ms = new EMUFILE_MEMORY(size);
unzReadCurrentFile(tz,ms->buf(),ufo.uncompressed_size);
unzCloseCurrentFile(tz);
unzClose(tz);
FCEUFILE *fceufp = new FCEUFILE();
fceufp->stream = ms;
fceufp->size = size;
return fceufp;
}
return 0;
}
FCEUFILE * FCEU_fopen(const char *path, const char *ipsfn, char *mode, char *ext, int index, const char** extensions)
{
FILE *ipsfile=0;
FCEUFILE *fceufp=0;
bool read = (std::string)mode == "rb";
bool write = (std::string)mode == "wb";
if((read&&write) || (!read&&!write))
{
FCEU_PrintError("invalid file open mode specified (only wb and rb are supported)");
return 0;
}
std::string archive,fname,fileToOpen;
FCEU_SplitArchiveFilename(path,archive,fname,fileToOpen);
//try to setup the ips file
if(ipsfn && read)
ipsfile=FCEUD_UTF8fopen(ipsfn,"rb");
if(read)
{
ArchiveScanRecord asr = FCEUD_ScanArchive(fileToOpen);
asr.files.FilterByExtension(extensions);
if(!asr.isArchive())
{
//if the archive contained no files, try to open it the old fashioned way
EMUFILE_FILE* fp = FCEUD_UTF8_fstream(fileToOpen,mode);
if(!fp || (fp->get_fp() == NULL))
{
return 0;
}
//try to read a zip file
{
fceufp = TryUnzip(fileToOpen);
if(fceufp) {
delete fp;
fceufp->filename = fileToOpen;
fceufp->logicalPath = fileToOpen;
fceufp->fullFilename = fileToOpen;
fceufp->archiveIndex = -1;
goto applyips;
}
}
//try to read a gzipped file
{
uint32 magic;
magic = fp->fgetc();
magic|=fp->fgetc()<<8;
magic|=fp->fgetc()<<16;
fp->fseek(0,SEEK_SET);
if(magic==0x088b1f) {
// maybe gzip...
gzFile gzfile = gzopen(fileToOpen.c_str(),"rb");
if(gzfile) {
delete fp;
int size;
for(size=0; gzgetc(gzfile) != EOF; size++) {}
EMUFILE_MEMORY* ms = new EMUFILE_MEMORY(size);
gzseek(gzfile,0,SEEK_SET);
gzread(gzfile,ms->buf(),size);
gzclose(gzfile);
fceufp = new FCEUFILE();
fceufp->filename = fileToOpen;
fceufp->logicalPath = fileToOpen;
fceufp->fullFilename = fileToOpen;
fceufp->archiveIndex = -1;
fceufp->stream = ms;
fceufp->size = size;
goto applyips;
}
}
}
//open a plain old file
fceufp = new FCEUFILE();
fceufp->filename = fileToOpen;
fceufp->logicalPath = fileToOpen;
fceufp->fullFilename = fileToOpen;
fceufp->archiveIndex = -1;
fceufp->stream = fp;
FCEU_fseek(fceufp,0,SEEK_END);
fceufp->size = FCEU_ftell(fceufp);
FCEU_fseek(fceufp,0,SEEK_SET);
goto applyips;
}
else
{
//open an archive file
if(archive == "")
if(index != -1)
fceufp = FCEUD_OpenArchiveIndex(asr, fileToOpen, index);
else
fceufp = FCEUD_OpenArchive(asr, fileToOpen, 0);
else
fceufp = FCEUD_OpenArchive(asr, archive, &fname);
if(!fceufp) return 0;
FileBaseInfo fbi = DetermineFileBase(fileToOpen);
fceufp->logicalPath = fbi.filebasedirectory + fceufp->filename;
goto applyips;
}
applyips:
//try to open the ips file
if(!ipsfile && !ipsfn)
ipsfile=FCEUD_UTF8fopen(FCEU_MakeIpsFilename(DetermineFileBase(fceufp->logicalPath.c_str())),"rb");
ApplyIPS(ipsfile,fceufp);
return fceufp;
}
return 0;
}
int FCEU_fclose(FCEUFILE *fp)
{
delete fp;
return 1;
}
uint64 FCEU_fread(void *ptr, size_t size, size_t nmemb, FCEUFILE *fp)
{
return fp->stream->fread((char*)ptr,size*nmemb);
}
uint64 FCEU_fwrite(void *ptr, size_t size, size_t nmemb, FCEUFILE *fp)
{
fp->stream->fwrite((char*)ptr,size*nmemb);
//todo - how do we tell how many bytes we wrote?
return nmemb;
}
int FCEU_fseek(FCEUFILE *fp, long offset, int whence)
{
fp->stream->fseek(offset,whence);
return FCEU_ftell(fp);
}
uint64 FCEU_ftell(FCEUFILE *fp)
{
return fp->stream->ftell();
}
int FCEU_read16le(uint16 *val, FCEUFILE *fp)
{
return read16le(val,fp->stream);
}
int FCEU_read32le(uint32 *Bufo, FCEUFILE *fp)
{
return read32le(Bufo, fp->stream);
}
int FCEU_fgetc(FCEUFILE *fp)
{
return fp->stream->fgetc();
}
uint64 FCEU_fgetsize(FCEUFILE *fp)
{
return fp->size;
}
int FCEU_fisarchive(FCEUFILE *fp)
{
if(fp->archiveIndex==0) return 0;
else return 1;
}
std::string GetMfn() //Retrieves the movie filename from curMovieFilename (for adding to savestate and auto-save files)
{
std::string movieFilenamePart;
extern char curMovieFilename[512];
if(*curMovieFilename)
{
char drv[PATH_MAX], dir[PATH_MAX], name[PATH_MAX], ext[PATH_MAX];
splitpath(curMovieFilename,drv,dir,name,ext);
movieFilenamePart = std::string(".") + name;
}
return movieFilenamePart;
}
/// Updates the base directory
void FCEUI_SetBaseDirectory(std::string const & dir)
{
BaseDirectory = dir;
}
static char *odirs[FCEUIOD__COUNT]={0,0,0,0,0,0,0,0,0,0,0,0,0}; // odirs, odors. ^_^
void FCEUI_SetDirOverride(int which, char *n)
{
// FCEU_PrintError("odirs[%d]=%s->%s", which, odirs[which], n);
if (which < FCEUIOD__COUNT)
{
odirs[which] = n;
}
}
#ifndef HAVE_ASPRINTF
static int asprintf(char **strp, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap,fmt);
if(!(*strp=(char*)FCEU_dmalloc(2048))) //mbg merge 7/17/06 cast to char*
return(0);
ret=vsnprintf(*strp,2048,fmt,ap);
va_end(ap);
return(ret);
}
#endif
std::string FCEU_GetPath(int type)
{
switch (type)
{
case FCEUMKF_STATE:
{
if(odirs[FCEUIOD_STATES])
return (odirs[FCEUIOD_STATES]);
else
return BaseDirectory + PSS + "fcs";
break;
}
case FCEUMKF_CHEAT:
{
if(odirs[FCEUIOD_CHEATS])
return (odirs[FCEUIOD_CHEATS]);
else
return BaseDirectory + PSS + "cheats";
break;
}
case FCEUMKF_MOVIE:
{
if(odirs[FCEUIOD_MOVIES])
return (odirs[FCEUIOD_MOVIES]);
else
return BaseDirectory + PSS + "movies";
break;
}
case FCEUMKF_MEMW:
{
if(odirs[FCEUIOD_MEMW])
return (odirs[FCEUIOD_MEMW]);
else
return ""; //adelikat: 03/02/09 - return null so it defaults to last directory used
//return BaseDirectory + PSS + "tools";
break;
}
//adelikat: TODO: this no longer exist and could be removed (but that would require changing a lot of other directory arrays
case FCEUMKF_BBOT:
{
if(odirs[FCEUIOD_BBOT])
return (odirs[FCEUIOD_BBOT]);
else
return BaseDirectory + PSS + "tools";
break;
}
case FCEUMKF_ROMS:
{
if(odirs[FCEUIOD_ROMS])
return (odirs[FCEUIOD_ROMS]);
else
return ""; //adelikat: removing base directory return, should return null it goes to last used directory
break;
}
case FCEUMKF_INPUT:
{
if(odirs[FCEUIOD_INPUT])
return (odirs[FCEUIOD_INPUT]);
else
return BaseDirectory + PSS + "tools";
break;
}
case FCEUMKF_LUA:
{
if(odirs[FCEUIOD_LUA])
return (odirs[FCEUIOD_LUA]);
else
return ""; //adelikat: 03/02/09 - return null so it defaults to last directory used //return BaseDirectory + PSS + "tools";
break;
}
case FCEUMKF_AVI:
{
if(odirs[FCEUIOD_AVI])
return (odirs[FCEUIOD_AVI]);
else
return ""; //adelikat - 03/02/09 - if no override, should return null and allow the last directory to be used intead
//return BaseDirectory + PSS + "tools";
break;
}
case FCEUMKF_TASEDITOR:
{
return BaseDirectory + PSS + "tools";
break;
}
}
return "";
}
std::string FCEU_MakePath(int type, const char* filebase)
{
char ret[FILENAME_MAX];
switch(type)
{
case FCEUMKF_MOVIE:
if(odirs[FCEUIOD_MOVIES])
return (string)odirs[FCEUIOD_MOVIES] + PSS + filebase;
else
return BaseDirectory + PSS + "movies" + PSS + filebase;
break;
case FCEUMKF_STATE:
if(odirs[FCEUIOD_STATES])
return (string)odirs[FCEUIOD_STATES] + PSS + filebase;
else
return BaseDirectory + PSS + "fcs" + PSS + filebase;
break;
}
return ret;
}
std::string FCEU_MakeFName(int type, int id1, const char *cd1)
{
char ret[FILENAME_MAX] = "";
struct stat tmpstat;
std::string mfnString;
const char* mfn; // the movie filename
switch(type)
{
case FCEUMKF_MOVIE:
struct stat fileInfo;
do {
if(odirs[FCEUIOD_MOVIES])
sprintf(ret,"%s"PSS"%s-%d.fm2",odirs[FCEUIOD_MOVIES],FileBase, id1);
else
sprintf(ret,"%s"PSS"movies"PSS"%s-%d.fm2",BaseDirectory.c_str(),FileBase, id1);
id1++;
} while (stat(ret, &fileInfo) == 0);
break;
case FCEUMKF_STATE:
{
if (bindSavestate)
mfnString = GetMfn();
else
mfnString = "";
if (mfnString.length() <= MAX_MOVIEFILENAME_LEN)
{
mfn = mfnString.c_str();
} else
{
//This caps the movie filename length before adding it to the savestate filename.
//This helps prevent possible crashes from savestate filenames of excessive length.
mfnString = mfnString.substr(0, MAX_MOVIEFILENAME_LEN);
mfn = mfnString.c_str();
}
if(odirs[FCEUIOD_STATES])
{
sprintf(ret,"%s"PSS"%s%s.fc%d",odirs[FCEUIOD_STATES],FileBase,mfn,id1);
} else
{
sprintf(ret,"%s"PSS"fcs"PSS"%s%s.fc%d",BaseDirectory.c_str(),FileBase,mfn,id1);
}
if(stat(ret,&tmpstat)==-1)
{
if(odirs[FCEUIOD_STATES])
{
sprintf(ret,"%s"PSS"%s%s.fc%d",odirs[FCEUIOD_STATES],FileBase,mfn,id1);
} else
{
sprintf(ret,"%s"PSS"fcs"PSS"%s%s.fc%d",BaseDirectory.c_str(),FileBase,mfn,id1);
}
}
}
break;
case FCEUMKF_RESUMESTATE:
{
if(odirs[FCEUIOD_STATES])
{
sprintf(ret,"%s"PSS"%s-resume.fcs",odirs[FCEUIOD_STATES],FileBase);
} else
{
sprintf(ret,"%s"PSS"fcs"PSS"%s-resume.fcs",BaseDirectory.c_str(),FileBase);
}
if(stat(ret,&tmpstat)==-1)
{
if(odirs[FCEUIOD_STATES])
{
sprintf(ret,"%s"PSS"%s-resume.fcs",odirs[FCEUIOD_STATES],FileBase);
} else
{
sprintf(ret,"%s"PSS"fcs"PSS"%s-resume.fcs",BaseDirectory.c_str(),FileBase);
}
}
}
break;
case FCEUMKF_SNAP:
if(odirs[FCEUIOD_SNAPS])
sprintf(ret,"%s"PSS"%s-%d.%s",odirs[FCEUIOD_SNAPS],FileBase,id1,cd1);
else
sprintf(ret,"%s"PSS"snaps"PSS"%s-%d.%s",BaseDirectory.c_str(),FileBase,id1,cd1);
break;
case FCEUMKF_FDS:
if(odirs[FCEUIOD_NV])
sprintf(ret,"%s"PSS"%s.fds",odirs[FCEUIOD_NV],FileBase);
else
sprintf(ret,"%s"PSS"sav"PSS"%s.fds",BaseDirectory.c_str(),FileBase);
break;
case FCEUMKF_SAV:
if(odirs[FCEUIOD_NV])
sprintf(ret,"%s"PSS"%s.%s",odirs[FCEUIOD_NV],FileBase,cd1);
else
sprintf(ret,"%s"PSS"sav"PSS"%s.%s",BaseDirectory.c_str(),FileBase,cd1);
if(stat(ret,&tmpstat)==-1)
{
if(odirs[FCEUIOD_NV])
sprintf(ret,"%s"PSS"%s.%s",odirs[FCEUIOD_NV],FileBase,cd1);
else
sprintf(ret,"%s"PSS"sav"PSS"%s.%s",BaseDirectory.c_str(),FileBase,cd1);
}
break;
case FCEUMKF_AUTOSTATE:
mfnString = GetMfn();
if (mfnString.length() <= MAX_MOVIEFILENAME_LEN)
{
mfn = mfnString.c_str();
} else
{
//This caps the movie filename length before adding it to the savestate filename.
//This helps prevent possible crashes from savestate filenames of excessive length.
mfnString = mfnString.substr(0, MAX_MOVIEFILENAME_LEN);
mfn = mfnString.c_str();
}
if(odirs[FCEUIOD_STATES])
{
sprintf(ret,"%s"PSS"%s%s-autosave%d.fcs",odirs[FCEUIOD_STATES],FileBase,mfn,id1);
} else
{
sprintf(ret,"%s"PSS"fcs"PSS"%s%s-autosave%d.fcs",BaseDirectory.c_str(),FileBase,mfn,id1);
}
if(stat(ret,&tmpstat)==-1)
{
if(odirs[FCEUIOD_STATES])
{
sprintf(ret,"%s"PSS"%s%s-autosave%d.fcs",odirs[FCEUIOD_STATES],FileBase,mfn,id1);
} else
{
sprintf(ret,"%s"PSS"fcs"PSS"%s%s-autosave%d.fcs",BaseDirectory.c_str(),FileBase,mfn,id1);
}
}
break;
case FCEUMKF_CHEAT:
if(odirs[FCEUIOD_CHEATS])
sprintf(ret,"%s"PSS"%s.cht",odirs[FCEUIOD_CHEATS],FileBase);
else
sprintf(ret,"%s"PSS"cheats"PSS"%s.cht",BaseDirectory.c_str(),FileBase);
break;
case FCEUMKF_IPS:
strcpy(ret,FCEU_MakeIpsFilename(CurrentFileBase()).c_str());
break;
case FCEUMKF_GGROM:sprintf(ret,"%s"PSS"gg.rom",BaseDirectory.c_str());break;
case FCEUMKF_FDSROM:
if(odirs[FCEUIOD_FDSROM])
sprintf(ret,"%s"PSS"disksys.rom",odirs[FCEUIOD_FDSROM]);
else
sprintf(ret,"%s"PSS"disksys.rom",BaseDirectory.c_str());
break;
case FCEUMKF_PALETTE:sprintf(ret,"%s"PSS"%s.pal",BaseDirectory.c_str(),FileBase);break;
case FCEUMKF_MOVIEGLOB:
//these globs use ??? because we can load multiple formats
if(odirs[FCEUIOD_MOVIES])
sprintf(ret,"%s"PSS"*.???",odirs[FCEUIOD_MOVIES]);
else
sprintf(ret,"%s"PSS"movies"PSS"*.???",BaseDirectory.c_str());
break;
case FCEUMKF_MOVIEGLOB2:sprintf(ret,"%s"PSS"*.???",BaseDirectory.c_str());break;
case FCEUMKF_STATEGLOB:
if(odirs[FCEUIOD_STATES])
sprintf(ret,"%s"PSS"%s*.fc?",odirs[FCEUIOD_STATES],FileBase);
else
sprintf(ret,"%s"PSS"fcs"PSS"%s*.fc?",BaseDirectory.c_str(),FileBase);
break;
}
//convert | to . for archive filenames.
return mass_replace(ret,"|",".");
}
void GetFileBase(const char *f)
{
FileBaseInfo fbi = DetermineFileBase(f);
strcpy(FileBase,fbi.filebase.c_str());
strcpy(FileBaseDirectory,fbi.filebasedirectory.c_str());
}
bool FCEU_isFileInArchive(const char *path)
{
bool isarchive = false;
FCEUFILE* fp = FCEU_fopen(path,0,"rb",0,0);
if(fp) {
isarchive = fp->isArchive();
delete fp;
}
return isarchive;
}
void FCEUARCHIVEFILEINFO::FilterByExtension(const char** ext)
{
if(!ext) return;
int count = size();
for(int i=count-1;i>=0;i--) {
std::string fext = getExtension((*this)[i].name.c_str());
const char** currext = ext;
while(*currext) {
if(fext == *currext)
goto ok;
currext++;
}
this->erase(begin()+i);
ok: ;
}
}
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