| // |
| // Copyright (c) 2000-2010 |
| // Joerg Walter, Mathias Koch, David Bellot |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See |
| // accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // The authors gratefully acknowledge the support of |
| // GeNeSys mbH & Co. KG in producing this work. |
| // |
| |
| #ifndef _BOOST_UBLAS_IO_ |
| #define _BOOST_UBLAS_IO_ |
| |
| // Only forward definition required to define stream operations |
| #include <iosfwd> |
| #include <sstream> |
| #include <boost/numeric/ublas/matrix_expression.hpp> |
| |
| |
| namespace boost { namespace numeric { namespace ublas { |
| |
| /** \brief output stream operator for vector expressions |
| * |
| * Any vector expressions can be written to a standard output stream |
| * as defined in the C++ standard library. For example: |
| * \code |
| * vector<float> v1(3),v2(3); |
| * for(size_t i=0; i<3; i++) |
| * { |
| * v1(i) = i+0.2; |
| * v2(i) = i+0.3; |
| * } |
| * cout << v1+v2 << endl; |
| * \endcode |
| * will display the some of the 2 vectors like this: |
| * \code |
| * [3](0.5,2.5,4.5) |
| * \endcode |
| * |
| * \param os is a standard basic output stream |
| * \param v is a vector expression |
| * \return a reference to the resulting output stream |
| */ |
| template<class E, class T, class VE> |
| // BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it. |
| std::basic_ostream<E, T> &operator << (std::basic_ostream<E, T> &os, |
| const vector_expression<VE> &v) { |
| typedef typename VE::size_type size_type; |
| size_type size = v ().size (); |
| std::basic_ostringstream<E, T, std::allocator<E> > s; |
| s.flags (os.flags ()); |
| s.imbue (os.getloc ()); |
| s.precision (os.precision ()); |
| s << '[' << size << "]("; |
| if (size > 0) |
| s << v () (0); |
| for (size_type i = 1; i < size; ++ i) |
| s << ',' << v () (i); |
| s << ')'; |
| return os << s.str ().c_str (); |
| } |
| |
| /** \brief input stream operator for vectors |
| * |
| * This is used to feed in vectors with data stored as an ASCII representation |
| * from a standard input stream. |
| * |
| * From a file or any valid stream, the format is: |
| * \c [<vector size>](<data1>,<data2>,...<dataN>) like for example: |
| * \code |
| * [5](1,2.1,3.2,3.14,0.2) |
| * \endcode |
| * |
| * You can use it like this |
| * \code |
| * my_input_stream >> my_vector; |
| * \endcode |
| * |
| * You can only put data into a valid \c vector<> not a \c vector_expression |
| * |
| * \param is is a standard basic input stream |
| * \param v is a vector |
| * \return a reference to the resulting input stream |
| */ |
| template<class E, class T, class VT, class VA> |
| // BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it. |
| std::basic_istream<E, T> &operator >> (std::basic_istream<E, T> &is, |
| vector<VT, VA> &v) { |
| typedef typename vector<VT, VA>::size_type size_type; |
| E ch; |
| size_type size; |
| if (is >> ch && ch != '[') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (is >> size >> ch && ch != ']') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (! is.fail ()) { |
| vector<VT, VA> s (size); |
| if (is >> ch && ch != '(') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (! is.fail ()) { |
| for (size_type i = 0; i < size; i ++) { |
| if (is >> s (i) >> ch && ch != ',') { |
| is.putback (ch); |
| if (i < size - 1) |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| } |
| if (is >> ch && ch != ')') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } |
| } |
| if (! is.fail ()) |
| v.swap (s); |
| } |
| return is; |
| } |
| |
| /** \brief output stream operator for matrix expressions |
| * |
| * it outpus the content of a \f$(M \times N)\f$ matrix to a standard output |
| * stream using the following format: |
| * \c[<rows>,<columns>]((<m00>,<m01>,...,<m0N>),...,(<mM0>,<mM1>,...,<mMN>)) |
| * |
| * For example: |
| * \code |
| * matrix<float> m(3,3) = scalar_matrix<float>(3,3,1.0) - diagonal_matrix<float>(3,3,1.0); |
| * cout << m << endl; |
| * \encode |
| * will display |
| * \code |
| * [3,3]((0,1,1),(1,0,1),(1,1,0)) |
| * \endcode |
| * This output is made for storing and retrieving matrices in a simple way but you can |
| * easily recognize the following: |
| * \f[ \left( \begin{array}{ccc} 1 & 1 & 1\\ 1 & 1 & 1\\ 1 & 1 & 1 \end{array} \right) - \left( \begin{array}{ccc} 1 & 0 & 0\\ 0 & 1 & 0\\ 0 & 0 & 1 \end{array} \right) = \left( \begin{array}{ccc} 0 & 1 & 1\\ 1 & 0 & 1\\ 1 & 1 & 0 \end{array} \right) \f] |
| * |
| * \param os is a standard basic output stream |
| * \param m is a matrix expression |
| * \return a reference to the resulting output stream |
| */ |
| template<class E, class T, class ME> |
| // BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it. |
| std::basic_ostream<E, T> &operator << (std::basic_ostream<E, T> &os, |
| const matrix_expression<ME> &m) { |
| typedef typename ME::size_type size_type; |
| size_type size1 = m ().size1 (); |
| size_type size2 = m ().size2 (); |
| std::basic_ostringstream<E, T, std::allocator<E> > s; |
| s.flags (os.flags ()); |
| s.imbue (os.getloc ()); |
| s.precision (os.precision ()); |
| s << '[' << size1 << ',' << size2 << "]("; |
| if (size1 > 0) { |
| s << '(' ; |
| if (size2 > 0) |
| s << m () (0, 0); |
| for (size_type j = 1; j < size2; ++ j) |
| s << ',' << m () (0, j); |
| s << ')'; |
| } |
| for (size_type i = 1; i < size1; ++ i) { |
| s << ",(" ; |
| if (size2 > 0) |
| s << m () (i, 0); |
| for (size_type j = 1; j < size2; ++ j) |
| s << ',' << m () (i, j); |
| s << ')'; |
| } |
| s << ')'; |
| return os << s.str ().c_str (); |
| } |
| |
| /** \brief input stream operator for matrices |
| * |
| * This is used to feed in matrices with data stored as an ASCII representation |
| * from a standard input stream. |
| * |
| * From a file or any valid standard stream, the format is: |
| * \c[<rows>,<columns>]((<m00>,<m01>,...,<m0N>),...,(<mM0>,<mM1>,...,<mMN>)) |
| * |
| * You can use it like this |
| * \code |
| * my_input_stream >> my_matrix; |
| * \endcode |
| * |
| * You can only put data into a valid \c matrix<> not a \c matrix_expression |
| * |
| * \param is is a standard basic input stream |
| * \param m is a matrix |
| * \return a reference to the resulting input stream |
| */ |
| template<class E, class T, class MT, class MF, class MA> |
| // BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it. |
| std::basic_istream<E, T> &operator >> (std::basic_istream<E, T> &is, |
| matrix<MT, MF, MA> &m) { |
| typedef typename matrix<MT, MF, MA>::size_type size_type; |
| E ch; |
| size_type size1, size2; |
| if (is >> ch && ch != '[') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (is >> size1 >> ch && ch != ',') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (is >> size2 >> ch && ch != ']') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (! is.fail ()) { |
| matrix<MT, MF, MA> s (size1, size2); |
| if (is >> ch && ch != '(') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (! is.fail ()) { |
| for (size_type i = 0; i < size1; i ++) { |
| if (is >> ch && ch != '(') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| for (size_type j = 0; j < size2; j ++) { |
| if (is >> s (i, j) >> ch && ch != ',') { |
| is.putback (ch); |
| if (j < size2 - 1) { |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| } |
| } |
| if (is >> ch && ch != ')') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| if (is >> ch && ch != ',') { |
| is.putback (ch); |
| if (i < size1 - 1) { |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| } |
| } |
| if (is >> ch && ch != ')') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } |
| } |
| if (! is.fail ()) |
| m.swap (s); |
| } |
| return is; |
| } |
| |
| /** \brief special input stream operator for symmetric matrices |
| * |
| * This is used to feed in symmetric matrices with data stored as an ASCII |
| * representation from a standard input stream. |
| * |
| * You can simply write your matrices in a file or any valid stream and read them again |
| * at a later time with this function. The format is the following: |
| * \code [<rows>,<columns>]((<m00>,<m01>,...,<m0N>),...,(<mM0>,<mM1>,...,<mMN>)) \endcode |
| * |
| * You can use it like this |
| * \code |
| * my_input_stream >> my_symmetric_matrix; |
| * \endcode |
| * |
| * You can only put data into a valid \c symmetric_matrix<>, not in a \c matrix_expression |
| * This function also checks that input data form a valid symmetric matrix |
| * |
| * \param is is a standard basic input stream |
| * \param m is a \c symmetric_matrix |
| * \return a reference to the resulting input stream |
| */ |
| template<class E, class T, class MT, class MF1, class MF2, class MA> |
| // BOOST_UBLAS_INLINE This function seems to be big. So we do not let the compiler inline it. |
| std::basic_istream<E, T> &operator >> (std::basic_istream<E, T> &is, |
| symmetric_matrix<MT, MF1, MF2, MA> &m) { |
| typedef typename symmetric_matrix<MT, MF1, MF2, MA>::size_type size_type; |
| E ch; |
| size_type size1, size2; |
| MT value; |
| if (is >> ch && ch != '[') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (is >> size1 >> ch && ch != ',') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (is >> size2 >> ch && (size2 != size1 || ch != ']')) { // symmetric matrix must be square |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (! is.fail ()) { |
| symmetric_matrix<MT, MF1, MF2, MA> s (size1, size2); |
| if (is >> ch && ch != '(') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } else if (! is.fail ()) { |
| for (size_type i = 0; i < size1; i ++) { |
| if (is >> ch && ch != '(') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| for (size_type j = 0; j < size2; j ++) { |
| if (is >> value >> ch && ch != ',') { |
| is.putback (ch); |
| if (j < size2 - 1) { |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| } |
| if (i <= j) { |
| // this is the first time we read this element - set the value |
| s(i,j) = value; |
| } |
| else if ( s(i,j) != value ) { |
| // matrix is not symmetric |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| } |
| if (is >> ch && ch != ')') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| if (is >> ch && ch != ',') { |
| is.putback (ch); |
| if (i < size1 - 1) { |
| is.setstate (std::ios_base::failbit); |
| break; |
| } |
| } |
| } |
| if (is >> ch && ch != ')') { |
| is.putback (ch); |
| is.setstate (std::ios_base::failbit); |
| } |
| } |
| if (! is.fail ()) |
| m.swap (s); |
| } |
| return is; |
| } |
| |
| |
| }}} |
| |
| #endif |