FileBlob Class Reference

#include <FileBlob.h>

Public Member Functions
	FileBlob ()
	FileBlob (const std::string &fname, bool zip)
	constructor from file to read More...
	FileBlob (std::istream &is, bool zip)
	constructor from stream to read More...
std::unique_ptr< std::vector< unsigned char > >	getUncompressedBlob () const
	i didn't want to do two copies ... hope this works. More...
void	getUncompressedBlob (std::vector< unsigned char > &myblobcopy) const
bool	isCompressed () const
void	read (const std::string &)
	read from real file More...
void	read (std::istream &)
	read from istream More...
int	size () const
void	write (const std::string &) const
	write to real file More...
void	write (std::ostream &) const
	write to ostream More...
	~FileBlob ()

Private Member Functions
template<class Archive >
void	serialize (Archive &ar, const unsigned int version)

Static Private Member Functions
static unsigned int	computeFileSize (const std::string &)
static unsigned int	computeStreamSize (std::istream &)

Private Attributes
std::vector< unsigned char >	blob
bool	compressed
unsigned int	isize

Friends
class	boost::serialization::access
template<typename CondSerializationT , typename Enabled >
struct	cond::serialization::access

Detailed Description

Definition at line 10 of file FileBlob.h.

Constructor & Destructor Documentation

FileBlob::FileBlob ( )

inline

Definition at line 12 of file FileBlob.h.

References alignmentValidation::fname, AlCaHLTBitMon_QueryRunRegistry::string, and ComparisonHelper::zip().

{};

FileBlob::FileBlob	(	const std::string &	fname,
		bool	zip
	)

constructor from file to read

Definition at line 9 of file FileBlob.cc.

References blob, compressed, computeFileSize(), isize, read(), and ComparisonHelper::zip().

                                                   : isize(0) {
  compressed = zip;
  /*  
  std::cout << "isize = " << isize 
        << "  zip = " << (zip? "true" : "false")
        << std::endl;
  */
  if (isize == 0)
    isize = computeFileSize(fname);
  // std::cout << "isize = " << isize << std::endl;
  blob.reserve(isize);
  read(fname);
}

FileBlob::FileBlob	(	std::istream &	is,
		bool	zip
	)

constructor from stream to read

Definition at line 22 of file FileBlob.cc.

References blob, compressed, computeStreamSize(), isize, read(), and ComparisonHelper::zip().

                                           : isize(0) {
  compressed = zip;
  if (isize == 0)
    isize = computeStreamSize(is);
  blob.reserve(isize);
  read(is);
}

FileBlob::~FileBlob ( )

inline

Definition at line 18 of file FileBlob.h.

References read(), AlCaHLTBitMon_QueryRunRegistry::string, and write().

{};

Member Function Documentation

unsigned int FileBlob::computeFileSize ( const std::string &  fname )

staticprivate

Definition at line 117 of file FileBlob.cc.

References computeStreamSize(), and compare_using_db::ifile.

Referenced by FileBlob(), and size().

                                                             {
  unsigned int is = 0;
  std::ifstream ifile(fname.c_str());
  if (!ifile) {
    edm::LogError("FileBlob") << "file " << fname << " does not exist...";
  } else
    is = computeStreamSize(ifile);
  ifile.close();
  return is;
}

unsigned int FileBlob::computeStreamSize ( std::istream &  is )

staticprivate

Definition at line 128 of file FileBlob.cc.

References HltBtagPostValidation_cff::c.

Referenced by computeFileSize(), FileBlob(), and size().

                                                       {
  unsigned int rs = 0;
  char c;
  while (is.get(c))
    rs++;
  is.clear();
  is.seekg(0);
  return rs;
}

std::unique_ptr< std::vector< unsigned char > > FileBlob::getUncompressedBlob

(

)

const

i didn't want to do two copies ... hope this works.

Definition at line 73 of file FileBlob.cc.

References blob, compressed, isize, and spu::zerr().

Referenced by size(), and MillePedeFileExtractor::writeGzipped().

                                                                             {
  std::unique_ptr<std::vector<unsigned char> > newblob;
  if (compressed) {
    newblob.reset(new std::vector<unsigned char>(isize));
    uLongf destLen = newblob->size();
    //    std::cout<<"Store isize = "<<isize<<"; newblob->size() = "<<newblob->size()<<"; destLen = "<<destLen<<std::endl;
    int zerr = uncompress(&*(newblob->begin()), &destLen, &*blob.begin(), blob.size());
    if (zerr != 0 || newblob->size() != destLen)
      edm::LogError("FileBlob") << "uncompressing error " << zerr << " original size was " << isize << " new size is "
                                << destLen;
  } else {
    newblob.reset(new std::vector<unsigned char>(blob));
  }
  return newblob;
}

void FileBlob::getUncompressedBlob

(

std::vector< unsigned char > &

myblobcopy

)

const

Definition at line 89 of file FileBlob.cc.

References blob, compressed, isize, and spu::zerr().

                                                                             {
  if (compressed) {
    myblobcopy.reserve(isize);
    uLongf destLen = isize;
    int zerr = uncompress(&*myblobcopy.begin(), &destLen, &*blob.begin(), blob.size());
    if (zerr != 0 || myblobcopy.size() != destLen)
      edm::LogError("FileBlob") << "uncompressing error " << zerr << " original size was " << isize << " new size is "
                                << destLen;
  } else {
    myblobcopy = blob;
  }
}

bool FileBlob::isCompressed ( ) const

inline

Definition at line 30 of file FileBlob.h.

References compressed.

{ return compressed; };

void FileBlob::read

(

const std::string &

fname

)

read from real file

Definition at line 102 of file FileBlob.cc.

References compare_using_db::ifile.

Referenced by FileBlob(), edmIntegrityCheck.PublishToFileSystem::get(), Vispa.Plugins.EdmBrowser.EdmDataAccessor.EdmDataAccessor::goto(), Vispa.Plugins.EdmBrowser.EdmDataAccessor.EdmDataAccessor::setFilterBranches(), and ~FileBlob().

                                          {
  std::ifstream ifile(fname.c_str());
  if (!ifile) {
    edm::LogError("FileBlob") << "file " << fname << " does not exist...";
  } else
    read(ifile);
  ifile.close();
}

void FileBlob::read

(

std::istream &

is

)

read from istream

Definition at line 30 of file FileBlob.cc.

References blob, HltBtagPostValidation_cff::c, compressed, recoMuon::in, isize, and spu::zerr().

Referenced by edmIntegrityCheck.PublishToFileSystem::get(), Vispa.Plugins.EdmBrowser.EdmDataAccessor.EdmDataAccessor::goto(), and Vispa.Plugins.EdmBrowser.EdmDataAccessor.EdmDataAccessor::setFilterBranches().

                                  {
  if (compressed) {
    std::vector<unsigned char> in;
    in.reserve(isize);
    char c;
    while (is.get(c))
      in.push_back((unsigned char)c);
    /*
    for(int i=0;i<in.size();i++){
      std::cout<<in[i];
    }
    std::cout<<std::endl;
    */
    blob.resize(isize);
    uLongf destLen = compressBound(in.size());
    int zerr = compress2(&*blob.begin(), &destLen, &*in.begin(), in.size(), 9);
    if (zerr != 0)
      edm::LogError("FileBlob") << "Compression error " << zerr;
    blob.resize(destLen);
  } else {
    //std::cout << "reading uncompressed" << std::endl;
    char c;
    while (is.get(c))
      blob.push_back((unsigned char)c);
    blob.resize(blob.size());
    isize = blob.size();
  }
}

template<class Archive >

void FileBlob::serialize ( Archive &  ar, const unsigned int  version  )

private

int FileBlob::size ( void  ) const

inline

Definition at line 32 of file FileBlob.h.

References computeFileSize(), computeStreamSize(), getUncompressedBlob(), isize, and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by ntupleDataFormat._Collection::__iter__(), ntupleDataFormat._Collection::__len__(), popcon::DQMReferenceHistogramRootFileSourceHandler::getNewObjects(), and popcon::DQMXMLFileSourceHandler::getNewObjects().

{ return isize; };

void FileBlob::write

(

const std::string &

fname

)

const

write to real file

Definition at line 111 of file FileBlob.cc.

References indexGen::ofile.

Referenced by pkg.AbstractPkg::generate(), and ~FileBlob().

                                                 {
  std::ofstream ofile(fname.c_str());
  write(ofile);
  ofile.close();
}

void FileBlob::write

(

std::ostream &

os

)

const

write to ostream

Definition at line 59 of file FileBlob.cc.

References blob, compressed, isize, MillePedeFileConverter_cfg::out, and spu::zerr().

Referenced by pkg.AbstractPkg::generate().

                                         {
  if (compressed) {
    std::vector<unsigned char> out(isize);
    uLongf destLen = out.size();
    int zerr = uncompress(&*out.begin(), &destLen, &*blob.begin(), blob.size());
    if (zerr != 0 || out.size() != destLen)
      edm::LogError("FileBlob") << "uncompressing error " << zerr << " original size was " << isize << " new size is "
                                << destLen;
    os.write(reinterpret_cast<const char*>(&*out.begin()), out.size());
  } else {
    os.write(reinterpret_cast<const char*>(&*blob.begin()), blob.size());
  }
}

Friends And Related Function Documentation

friend class boost::serialization::access

friend

Definition at line 47 of file FileBlob.h.

template<typename CondSerializationT , typename Enabled >

friend struct cond::serialization::access

friend

Definition at line 47 of file FileBlob.h.

Member Data Documentation

std::vector<unsigned char> FileBlob::blob

private

Definition at line 43 of file FileBlob.h.

Referenced by FileBlob(), getUncompressedBlob(), read(), and write().

bool FileBlob::compressed

private

Definition at line 44 of file FileBlob.h.

Referenced by FileBlob(), getUncompressedBlob(), isCompressed(), read(), and write().

unsigned int FileBlob::isize

private

Definition at line 45 of file FileBlob.h.

Referenced by FileBlob(), getUncompressedBlob(), read(), size(), and write().