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