SubVec.h

/*
 * Expression Template Matrix Library
 *
 * Copyright (C) 2004 - 2006 Ricky Lung <mtlung@users.sourceforge.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */


// Forward declaration
template<class Rep, class ExtraTParam> class StaticConstSubVecView;
template<class Rep> class DynConstSubVecView;

template<class Rep, class ExtraTParam>
class StaticSubVecView : public StaticSubVecViewTag
{
public:
    typedef StaticSubVecView<Rep, ExtraTParam>      self_type;
    typedef StaticSubVecViewTag                     exp_tag;
    typedef ExtraTParam                             extra_param_type;
    typedef StaticConstSubVecView<Rep, ExtraTParam> const_view_type;
    COMMON_VIEW_TYPEDEFS();

    enum {
        BEGIN = ExtraTParam::INT1,
        SIZE = ExtraTParam::INT2,
        ROWS = super_type::ROWS == 1 ? 1 : SIZE,
        COLS = super_type::COLS == 1 ? 1 : SIZE,
        IsLinear = true,
        IsLinearRecursive = IsLinear && super_type::IsLinearRecursive,
        TNOP = 0,
        ENOP = 0,
        EXPLevel = Rep::EXPLevel + 1
    };

    typedef Vec<DenseMatCon<value_type,ROWS,COLS>, EmptyErrorChecker> temp_type;

    /************************************************/
    // Constructors
    EXMAT_INLINE2 StaticSubVecView(const self_type& self)
        : rep(self.rep) {}
    EXMAT_INLINE2 StaticSubVecView(Rep& vec)
        : rep(vec) { ComErrCheck(); }
    template<class Rep2> EXMAT_INLINE2
    StaticSubVecView(const Rep2& self, Rep& vec)
        : rep(vec) {
        THROWMSG(ROWS==Rep2::ROWS && COLS==Rep2::COLS, InternalErrMsg, __FILE__);
        ComErrCheck();
    }

    /************************************************/
    // Dimension information
    EXMAT_INLINE2 size_t size() const { return SIZE; }
    EXMAT_INLINE2 size_t rows() const { return ROWS; }
    EXMAT_INLINE2 size_t cols() const { return COLS; }
    /************************************************/
    // Index function (for internal use, no error checking applied)
    EXMAT_INLINE2 reference setAt(index_type i)
    {   return rep.setAt(BEGIN+i);  }
    EXMAT_INLINE2 const_reference getAt(index_type i) const
    {   return rep.getAt(BEGIN+i);  }
    EXMAT_INLINE2 reference setAt(index_type i, index_type j)
    {   return rep.setAt(ROWS==1?0:BEGIN+i, COLS==1?0:BEGIN+j); }
    EXMAT_INLINE2 const_reference getAt(index_type i, index_type j) const
    {   return rep.getAt(ROWS==1?0:BEGIN+i, COLS==1?0:BEGIN+j); }

private:
    // Compatibility error checking
    EXMAT_INLINE2 void ComErrCheck() {
        enum { SuperSIZE = (super_type::ROWS * super_type::COLS) };
        #if EXMAT_STATIC_CHECK
            StaticAssert1(super_type::ROWS == 1 || super_type::COLS == 1, NotAVec);
            StaticAssert1(BEGIN < SuperSIZE, BeginOutOfRange);
            StaticAssert1(SIZE > 0 && BEGIN + SIZE <= SuperSIZE, SizeOutOfRange);
        #else
            DefaultErrorChecker::AssertCompat(
                (super_type::ROWS == 1 || super_type::COLS == 1) &&
                int(BEGIN) < int(SuperSIZE) && 
                (SIZE > 0 && BEGIN + SIZE <= SuperSIZE)
            );
        #endif  // EXMAT_STATIC_CHECK
    }
};
#if !EXMAT_VC6

template<class Rep, class ErrChk, int BEGIN, int SIZE> EXMAT_INLINE2 static
Vec<ExpMat<StaticSubVecView<Rep,TParamINT2<BEGIN,SIZE> > >, ErrChk>
subVec(Vec<Rep, ErrChk>& vec, Int2Type<BEGIN>, Int2Type<SIZE>) {
    return Vec<ExpMat<StaticSubVecView<Rep,TParamINT2<BEGIN,SIZE> > >, ErrChk>(
        ExpMat<StaticSubVecView<Rep,TParamINT2<BEGIN,SIZE> > >(vec)
    );
}
#endif  // !EXMAT_VC6


template<class Rep, class ExtraTParam>
class StaticConstSubVecView : public StaticSubVecViewTag
{
public:
    typedef StaticConstSubVecView<Rep, ExtraTParam> self_type;
    typedef StaticSubVecViewTag                     exp_tag;
    typedef ExtraTParam                             extra_param_type;
    COMMON_CONST_VIEW_TYPEDEFS();

    enum {
        BEGIN = ExtraTParam::INT1,
        SIZE = ExtraTParam::INT2,
        ROWS = super_type::ROWS == 1 ? 1 : SIZE,
        COLS = super_type::COLS == 1 ? 1 : SIZE,
        IsLinear = true,
        IsLinearRecursive = IsLinear && super_type::IsLinearRecursive,
        TNOP = 0,
        ENOP = 0,
        EXPLevel = Rep::EXPLevel + 1
    };

    typedef Vec<DenseMatCon<value_type,ROWS,COLS>, EmptyErrorChecker> temp_type;

    /************************************************/
    // Constructors
    EXMAT_INLINE2 StaticConstSubVecView(const self_type& self)
        : rep(self.rep) {}
    EXMAT_INLINE2 StaticConstSubVecView(const Rep& vec)
        : rep(vec) { ComErrCheck(); }
    template<class Rep2> EXMAT_INLINE2
    StaticConstSubVecView(const Rep2& self, const Rep& vec)
        : rep(vec) {
        THROWMSG(ROWS==Rep2::ROWS && COLS==Rep2::COLS, InternalErrMsg, __FILE__);
        ComErrCheck();
    }

    /************************************************/
    // Dimension information
    EXMAT_INLINE2 size_t size() const { return SIZE; }
    EXMAT_INLINE2 size_t rows() const { return ROWS; }
    EXMAT_INLINE2 size_t cols() const { return COLS; }
    /************************************************/
    // Index function (for internal use, no error checking applied)
    EXMAT_INLINE2 const_reference getAt(index_type i) const
    {   return rep.getAt(BEGIN+i);  }
    EXMAT_INLINE2 const_reference getAt(index_type i, index_type j) const
    {   return rep.getAt(ROWS==1?0:BEGIN+i, COLS==1?0:BEGIN+j); }

private:
    // Compatibility error checking
    EXMAT_INLINE2 void ComErrCheck() {
        enum { SuperSIZE = (super_type::ROWS * super_type::COLS) };
        #if EXMAT_STATIC_CHECK
            StaticAssert1(super_type::ROWS == 1 || super_type::COLS == 1, NotAVec);
            StaticAssert1(BEGIN < SuperSIZE, BeginOutOfRange);
            StaticAssert1(SIZE > 0 && BEGIN + SIZE <= SuperSIZE, SizeOutOfRange);
        #else
            DefaultErrorChecker::AssertCompat(
                (super_type::ROWS == 1 || super_type::COLS == 1) &&
                int(BEGIN) < int(SuperSIZE) && 
                (SIZE > 0 && BEGIN + SIZE <= SuperSIZE)
            );
        #endif  // EXMAT_STATIC_CHECK
    }
};
#if !EXMAT_VC6

template<class Rep, class ErrChk, int BEGIN, int SIZE> EXMAT_INLINE2 static
const Vec<ExpMat<StaticConstSubVecView<Rep,TParamINT2<BEGIN,SIZE> > >, ErrChk>
subVec(const Vec<Rep, ErrChk>& vec, Int2Type<BEGIN>, Int2Type<SIZE>) {
    return Vec<ExpMat<StaticConstSubVecView<Rep,TParamINT2<BEGIN,SIZE> > >, ErrChk>(
        ExpMat<StaticConstSubVecView<Rep,TParamINT2<BEGIN,SIZE> > >(vec)
    );
}
#endif  // !EXMAT_VC6


template<class Rep>
class DynSubVecView : public DynSubVecViewTag
{
public:
    typedef DynSubVecView<Rep>      self_type;
    typedef DynSubVecViewTag        exp_tag;
    typedef NullTag                 extra_param_type;
    typedef DynConstSubVecView<Rep> const_view_type;
    COMMON_VIEW_TYPEDEFS();

    enum {
        ROWS = (Rep::ROWS == 1) ? 1 : 0,
        COLS = (Rep::COLS == 1) ? 1 : 0,
        IsLinear = true,
        IsLinearRecursive = IsLinear && super_type::IsLinearRecursive,
        TNOP = 0,
        ENOP = 0,
        EXPLevel = Rep::EXPLevel + 1
    };

    typedef Vec<DenseMatCon<value_type,ROWS,COLS>, EmptyErrorChecker> temp_type;

    /************************************************/
    // Constructors
    EXMAT_INLINE2 DynSubVecView(const self_type& self)
        : rep(self.rep), begin_(self.begin_), size_(self.size_) {}
    EXMAT_INLINE2 DynSubVecView(Rep& vec, size_t b, size_t s)
        : rep(vec), begin_(b), size_(s) { ComErrCheck(); }
    template<class Rep2> EXMAT_INLINE2
    DynSubVecView(const Rep2& self, Rep& vec)
        : rep(vec), begin_(self.begin_), size_(self.size_) { ComErrCheck(); }

    /************************************************/
    // Dimension information
    EXMAT_INLINE2 size_t size() const { return size_; }
    EXMAT_INLINE2 size_t rows() const { return rep.rows() == 1 ? 1 : size_; }
    EXMAT_INLINE2 size_t cols() const { return rep.cols() == 1 ? 1 : size_; }
    /************************************************/
    // Index function (for internal use, no error checking applied)
    EXMAT_INLINE2 reference setAt(index_type i)
    {   return rep.setAt(begin_+i); }
    EXMAT_INLINE2 const_reference getAt(index_type i) const
    {   return rep.getAt(begin_+i); }
    EXMAT_INLINE2 reference setAt(index_type i, index_type j)
    {   return rep.setAt(rep.rows()==1?0:begin_+i, rep.cols()==1?0:begin_+j);   }
    EXMAT_INLINE2 const_reference getAt(index_type i, index_type j) const
    {   return rep.getAt(rep.rows()==1?0:begin_+i, rep.cols()==1?0:begin_+j);   }

public:
    const size_t begin_, size_;

private:
    // Compatibility error checking
    EXMAT_INLINE2 void ComErrCheck() {
        DefaultErrorChecker::AssertCompat(
            (rep.rows() == 1 || rep.cols() == 1) &&
            begin_ < rep.size() && 
            (size_ > 0 && begin_ + size_ <= rep.size())
        );
    }
};
template<class Rep, class ErrChk> EXMAT_INLINE2 static
Vec<ExpMat<DynSubVecView<Rep> >, ErrChk>
subVec(Vec<Rep, ErrChk>& vec, size_t begin, size_t size) {
    return Vec<ExpMat<DynSubVecView<Rep> >, ErrChk>(ExpMat<DynSubVecView<Rep> >(vec, begin, size));
}


template<class Rep>
class DynConstSubVecView : public DynSubVecViewTag
{
public:
    typedef DynConstSubVecView<Rep> self_type;
    typedef DynSubVecViewTag        exp_tag;
    typedef NullTag                 extra_param_type;
    COMMON_CONST_VIEW_TYPEDEFS();

    enum {
        ROWS = (Rep::ROWS == 1) ? 1 : 0,
        COLS = (Rep::COLS == 1) ? 1 : 0,
        IsLinear = true,
        IsLinearRecursive = IsLinear && super_type::IsLinearRecursive,
        TNOP = 0,
        ENOP = 0,
        EXPLevel = Rep::EXPLevel + 1
    };

    typedef Vec<DenseMatCon<value_type,ROWS,COLS>, EmptyErrorChecker> temp_type;

    /************************************************/
    // Constructors
    EXMAT_INLINE2 DynConstSubVecView(const self_type& self)
        : rep(self.rep), begin_(self.begin_), size_(self.size_) {}
    EXMAT_INLINE2 DynConstSubVecView(const Rep& vec, size_t b, size_t s)
        : rep(vec), begin_(b), size_(s) { ComErrCheck(); }
    template<class Rep2> EXMAT_INLINE2
    DynConstSubVecView(const Rep2& self, const Rep& vec)
        : rep(vec), begin_(self.begin_), size_(self.size_) { ComErrCheck(); }

    /************************************************/
    // Dimension information
    EXMAT_INLINE2 size_t size() const { return size_; }
    EXMAT_INLINE2 size_t rows() const { return rep.rows() == 1 ? 1 : size_; }
    EXMAT_INLINE2 size_t cols() const { return rep.cols() == 1 ? 1 : size_; }
    /************************************************/
    // Index function (for internal use, no error checking applied)
    EXMAT_INLINE2 const_reference getAt(index_type i) const
    {   return rep.getAt(begin_+i); }
    EXMAT_INLINE2 const_reference getAt(index_type i, index_type j) const
    {   return rep.getAt(rep.rows()==1?0:begin_+i, rep.cols()==1?0:begin_+j);   }

public:
    const size_t begin_, size_;

private:
    // Compatibility error checking
    EXMAT_INLINE2 void ComErrCheck() {
        DefaultErrorChecker::AssertCompat(
            (rep.rows() == 1 || rep.cols() == 1) &&
            begin_ < rep.size() && 
            (size_ > 0 && begin_ + size_ <= rep.size())
        );
    }
};
template<class Rep, class ErrChk> EXMAT_INLINE2 static
const Vec<ExpMat<DynConstSubVecView<Rep> >, ErrChk>
subVec(const Vec<Rep, ErrChk>& vec, size_t begin, size_t size) {
    return Vec<ExpMat<DynConstSubVecView<Rep> >, ErrChk>(ExpMat<DynConstSubVecView<Rep> >(vec, begin, size));
}

---