libcryfs/data/Data.cpp

41 lines
832 B
C++
Raw Normal View History

2015-04-25 02:21:39 +02:00
#include "Data.h"
#include <stdexcept>
using std::istream;
using std::ofstream;
using std::ifstream;
using std::ios;
namespace bf = boost::filesystem;
namespace cpputils {
boost::optional<Data> Data::LoadFromFile(const bf::path &filepath) {
ifstream file(filepath.c_str(), ios::binary);
if (!file.good()) {
return boost::none;
}
return LoadFromStream(file);
2015-04-25 02:21:39 +02:00
}
std::streampos Data::_getStreamSize(istream &stream) {
2015-04-25 02:21:39 +02:00
auto current_pos = stream.tellg();
//Retrieve length
stream.seekg(0, stream.end);
auto endpos = stream.tellg();
//Restore old position
stream.seekg(current_pos, stream.beg);
return endpos - current_pos;
}
2015-10-25 11:32:40 +01:00
Data Data::LoadFromStream(istream &stream, size_t size) {
Data result(size);
stream.read(static_cast<char*>(result.data()), result.size());
return std::move(result);
2015-04-25 02:21:39 +02:00
}
}