C++ (Cpp) readFAT Examples

Example #1

File: ndsrom.cpp Project: DeejStar/xoreos

void NDSFile::load() {
	Common::File nds;
	open(nds);

	if (!isNDS(nds))
		throw Common::Exception("Not a support NDS ROM file");

	nds.seek(0x40);

	uint32 fileNameTableOffset = nds.readUint32LE();
	uint32 fileNameTableLength = nds.readUint32LE();
	uint32 fatOffset           = nds.readUint32LE();
	//uint32 fatLength = nds.readUint32LE();

	try {

		readNames(nds, fileNameTableOffset, fileNameTableLength);
		readFAT(nds, fatOffset);

	if (nds.err())
		throw Common::Exception(Common::kReadError);

	} catch (Common::Exception &e) {
		e.add("Failed reading NDS file");
		throw;
	}

}

Example #2

File: Runner.cpp Project: ycchangabriel/File-Recovery

void Runner::run()
{
	if((device.fd=open(device.filename.c_str(), O_RDONLY))==-1)
    {
    	std::cout <<"Cannot open device"<< std::endl;
    	return;
    }

	if(readBootEntry()==-1)		return;
	if(readFAT()==-1)			return;
	if(readDirEntry()==-1)		return;

	switch(action)
	{
		case PRINTBOOT:
			printFSinfo();
			break;
		case LISTDIR:
			listDir();
			break;
		case EIGHTPTHREE:
			eightPthree();
			break;
		case LONGFN:
			longFN();
			break;
		default:
			std::cout <<"what should I do?"<< std::endl;
	}

	close(device.fd);
}

Example #3

File: readfat.c Project: CatharticMonkey/rix

FILE *readfiletoFILE(char *shortname)
{
    FILE *retfile = palloc(sizeof(FILE));
    struct bpb *header = palloc(512);
    
    readblock(0, (unsigned char*)header, 1, 0);
    header = (struct bpb*)((unsigned char*)header + 3);
    
    fileentry_t *initEntry;
    initEntry = getinitialentry(shortname, header);

    unsigned int fatSize = (header->sectorsPerFAT * header->sectorSize);
    unsigned char *fat = readFAT(header, fatSize);

    retfile->currentreadoffset = 0;
    retfile->currentwriteoffset = 0;
    retfile->stream = palloc(initEntry->sizebytes);
    retfile->length = initEntry->sizebytes;
    unsigned short clusternum = initEntry->startcluster;
    unsigned int maxnumclusters = header->sectorsPerFAT * header->sectorSize / 16;

    while(clusternum && clusternum < maxnumclusters)
    {
        readcluster(clusternum, header, retfile->stream + retfile->currentwriteoffset);
        retfile->currentwriteoffset += (header->sectorsPerCluster * header->sectorSize);
        clusternum = nextcluster(clusternum, fat);
    }

    pfree(header);
    pfree(fat);

    return retfile;
}

Example #4

File: readfat.c Project: CatharticMonkey/rix

unsigned char *readfile(char *shortname)
{
    struct bpb *header = palloc(512);
    
    readblock(0, (unsigned char*)header, 1, 0);
    header = (struct bpb*)((unsigned char*)header + 3);
    
    fileentry_t *initEntry;
    initEntry = getinitialentry(shortname, header);

    unsigned int fatSize = (header->sectorsPerFAT * header->sectorSize);
    unsigned char *fat = readFAT(header, fatSize);
    

    unsigned char *buffer = palloc(initEntry->sizebytes);
    unsigned char *retval = buffer;
    unsigned short clusternum = initEntry->startcluster;

    unsigned int maxnumclusters = header->sectorsPerFAT * header->sectorSize / 16;

    while(clusternum < maxnumclusters)
    {
        readcluster(clusternum, header, buffer);
        buffer += (header->sectorsPerCluster * header->sectorSize);
        clusternum = nextcluster(clusternum, fat);
    }

    pfree(header);
    pfree(fat);

    return retval;
}

Example #5

File: ndsrom.cpp Project: EffWun/xoreos-tools

void NDSFile::load() {
	Common::File nds;
	open(nds);

	if (!readHeader(nds))
		throw Common::Exception("Not a valid NDS ROM file");

	try {

		readNames(nds, _fileNameTableOffset, _fileNameTableLength);
		readFAT(nds, _fatOffset);

	if (nds.err())
		throw Common::Exception(Common::kReadError);

	} catch (Common::Exception &e) {
		e.add("Failed reading NDS file");
		throw;
	}

}

Example #6

File: ndsrom.cpp Project: asr1/xoreos-tools

void NDSFile::load(Common::SeekableReadStream &nds) {
	if (!isNDS(nds, _title, _code, _maker))
		throw Common::Exception("Not a supported NDS ROM file");

	nds.seek(0x40);

	uint32 fileNameTableOffset = nds.readUint32LE();
	uint32 fileNameTableLength = nds.readUint32LE();
	uint32 fatOffset           = nds.readUint32LE();
	//uint32 fatLength = nds.readUint32LE();

	try {

		readNames(nds, fileNameTableOffset, fileNameTableLength);
		readFAT(nds, fatOffset);

	} catch (Common::Exception &e) {
		e.add("Failed reading NDS file");
		throw;
	}

}