comparison DEPENDENCIES/generic/include/boost/numeric/ublas/io.hpp @ 16:2665513ce2d3

Add boost headers

+//
+//  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