27 #ifndef INPUT_OUTPUT_H_
28 #define INPUT_OUTPUT_H_
43 template<
typename Derived>
74 template<
typename InputIterator>
77 const std::string& separator,
78 const std::string& start =
"[",
79 const std::string& end =
"]")
82 first, last, separator, start, end);
95 template<
typename Container>
97 const Container& c,
const std::string& separator,
98 const std::string& start =
"[",
const std::string& end =
"]",
102 std::begin(c), std::end(c), separator, start, end);
115 template<
typename Po
interType>
117 const std::string& separator,
118 const std::string& start =
"[",
119 const std::string& end =
"]")
132 template<
typename Derived>
133 void save(
const Eigen::MatrixBase<Derived>& A,
const std::string& fname)
144 fout.open(fname, std::ios::out | std::ios::binary);
148 throw std::runtime_error(
149 "qpp::save(): Error writing output file \""
150 + std::string(fname) +
"\"!");
155 const char _header[] =
"TYPE::Eigen::Matrix";
156 fout.write(_header,
sizeof(_header));
158 idx rows =
static_cast<idx>(rA.rows());
159 idx cols =
static_cast<idx>(rA.cols());
160 fout.write((
char*) &rows,
sizeof(rows));
161 fout.write((
char*) &cols,
sizeof(cols));
163 fout.write((
char*) rA.data(),
164 sizeof(
typename Derived::Scalar) * rows * cols);
187 template<
typename Derived>
191 fin.open(fname, std::ios::in | std::ios::binary);
197 throw std::runtime_error(
198 "qpp::load(): Error opening input file \""
199 + std::string(fname) +
"\"!");
202 const char _header[] =
"TYPE::Eigen::Matrix";
203 char* _fheader =
new char[
sizeof(_header)];
206 fin.read(_fheader,
sizeof(_header));
207 if ( strcmp(_fheader, _header))
210 throw std::runtime_error(
211 "qpp::load(): Input file \"" + std::string(fname)
212 +
"\" is corrupted!");
218 fin.read((
char*) &rows,
sizeof(rows));
219 fin.read((
char*) &cols,
sizeof(cols));
223 fin.read((
char*) A.data(),
224 sizeof(
typename Derived::Scalar) * rows * cols);
constexpr double chop
Used in qpp::disp() for setting to zero numbers that have their absolute value smaller than qpp::chop...
Definition: constants.h:59
Eigen::Matrix< Scalar, Eigen::Dynamic, Eigen::Dynamic > dyn_mat
Dynamic Eigen matrix over the field specified by Scalar.
Definition: types.h:83
Definition: iomanip.h:132
Quantum++ main namespace.
Definition: codes.h:30
Checks whether T is compatible with an STL-like iterable container.
Definition: traits.h:52
Definition: iomanip.h:215
std::complex< double > cplx
Complex number in double precision.
Definition: types.h:51
Generates custom exceptions, used when validating function parameters.
Definition: exception.h:39
bool _check_nonzero_size(const T &x) noexcept
Definition: util.h:112
Definition: iomanip.h:176
dyn_mat< typename Derived::Scalar > load(const std::string &fname)
Loads Eigen matrix from a binary file (internal format) in double precision.
Definition: input_output.h:188
void save(const Eigen::MatrixBase< Derived > &A, const std::string &fname)
Saves Eigen expression to a binary file (internal format) in double precision.
Definition: input_output.h:133
std::size_t idx
Non-negative integer index.
Definition: types.h:36
internal::IOManipEigen disp(const Eigen::MatrixBase< Derived > &A, double chop=qpp::chop)
Eigen expression ostream manipulator.
Definition: input_output.h:44