Loading...
Searching...
No Matches
Encoder.h
// Copyright (C) 2009 Garth N. Wells
//
// This file is part of DOLFIN.
//
// DOLFIN is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// DOLFIN 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//
// Modified by Anders Logg 2011
//
// First added: 2009-08-11
// Last changed: 2011-11-14
#ifndef __ENCODER_H
#define __ENCODER_H
#ifdef HAS_ZLIB
#include <zlib.h>
extern "C"
{
int compress(Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen);
}
#endif
#include <sstream>
#include <vector>
#include <utility>
#include "base64.h"
namespace dolfin
{
namespace Encoder
{
template<typename T>
static void encode_base64(const T* data, std::size_t length,
std::stringstream& encoded_data)
{
encoded_data << base64_encode((const unsigned char*) &data[0],
length*sizeof(T));
}
template<typename T>
static void encode_base64(const std::vector<T>& data,
std::stringstream& encoded_data)
{
encoded_data << base64_encode((const unsigned char*) &data[0],
data.size()*sizeof(T));
}
#ifdef HAS_ZLIB
template<typename T>
static std::vector<unsigned char> compress_data(const std::vector<T>& data)
{
// Compute length of uncompressed data
const unsigned long uncompressed_size = data.size()*sizeof(T);
// Compute maximum length of compressed data
unsigned long compressed_size = (uncompressed_size + (((uncompressed_size)/1000)+1)+12);;
// Allocate space for compressed data
std::vector<unsigned char> compressed_data(compressed_size);
// Compress data
if (compress((Bytef*) compressed_data.data(), &compressed_size,
(const Bytef*) data.data(), uncompressed_size) != Z_OK)
{
dolfin_error("Encoder.h",
"compress data when writing file",
"Zlib error while compressing data");
}
// Return data
return compressed_data;
}
#endif
}
}
#endif
dolfin::Encoder
Definition Encoder.h:49
dolfin
Definition adapt.h:30
dolfin::dolfin_error
void dolfin_error(std::string location, std::string task, std::string reason,...)
Definition log.cpp:129