Adding upstream version 1.3.upstream/1.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 594 insertions, 0 deletions

diff --git a/include/2geom/numeric/vector.h b/include/2geom/numeric/vector.h
new file mode 100644
index 0000000..b66115b
--- /dev/null
+++ b/include/2geom/numeric/vector.h
@@ -0,0 +1,594 @@
+/*
+ * Vector, VectorView, ConstVectorView classes wrap the gsl vector routines;
+ * "views" mimic the semantic of C++ references: any operation performed
+ * on a "view" is actually performed on the "viewed object"
+ *
+ * Authors:
+ * 		Marco Cecchetti <mrcekets at gmail.com>
+ *
+ * Copyright 2008  authors
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ */
+
+
+
+
+#ifndef _NL_VECTOR_H_
+#define _NL_VECTOR_H_
+
+#include <cassert>
+#include <algorithm> // for std::swap
+#include <vector>
+#include <sstream>
+#include <string>
+
+
+#include <gsl/gsl_vector.h>
+#include <gsl/gsl_blas.h>
+
+
+namespace Geom { namespace NL {
+
+namespace detail
+{
+
+class BaseVectorImpl
+{
+  public:
+	double const& operator[](size_t i) const
+	{
+		return *gsl_vector_const_ptr(m_vector, i);
+	}
+
+	const gsl_vector* get_gsl_vector() const
+	{
+		return m_vector;
+	}
+	bool is_zero() const
+	{
+		return gsl_vector_isnull(m_vector);
+	}
+
+	bool is_positive() const
+	{
+	    for ( size_t i = 0; i < size(); ++i )
+	    {
+	        if ( (*this)[i] <= 0 ) return false;
+	    }
+		return true;
+	}
+
+	bool is_negative() const
+	{
+        for ( size_t i = 0; i < size(); ++i )
+        {
+            if ( (*this)[i] >= 0 ) return false;
+        }
+        return true;
+	}
+
+	bool is_non_negative() const
+	{
+		for ( size_t i = 0; i < size(); ++i )
+		{
+			if ( (*this)[i] < 0 ) return false;
+		}
+		return true;
+	}
+
+	double max() const
+	{
+		return gsl_vector_max(m_vector);
+	}
+
+	double min() const
+	{
+		return gsl_vector_min(m_vector);
+	}
+
+	size_t max_index() const
+	{
+		return gsl_vector_max_index(m_vector);
+	}
+
+	size_t min_index() const
+	{
+		return gsl_vector_min_index(m_vector);
+	}
+
+	size_t size() const
+	{
+		return m_size;
+	}
+
+	std::string str() const;
+
+	virtual ~BaseVectorImpl()
+	{
+	}
+
+  protected:
+	size_t m_size;
+	gsl_vector* m_vector;
+
+};  // end class BaseVectorImpl
+
+
+inline
+bool operator== (BaseVectorImpl const& v1, BaseVectorImpl const& v2)
+{
+	if (v1.size() != v2.size())	return false;
+
+	for (size_t i = 0; i < v1.size(); ++i)
+	{
+		if (v1[i] != v2[i])  return false;
+	}
+	return true;
+}
+
+template< class charT >
+inline
+std::basic_ostream<charT> &
+operator<< (std::basic_ostream<charT> & os, const BaseVectorImpl & _vector)
+{
+	if (_vector.size() == 0 ) return os;
+	os << "[" << _vector[0];
+	for (unsigned int i = 1; i < _vector.size(); ++i)
+	{
+		os << ", " << _vector[i];
+	}
+	os << "]";
+	return os;
+}
+
+inline
+std::string BaseVectorImpl::str() const
+{
+	std::ostringstream oss;
+	oss << (*this);
+	return oss.str();
+}
+
+inline
+double dot(BaseVectorImpl const& v1, BaseVectorImpl const& v2)
+{
+    double result;
+    gsl_blas_ddot(v1.get_gsl_vector(), v2.get_gsl_vector(), &result);
+    return result;
+}
+
+
+class VectorImpl : public BaseVectorImpl
+{
+  public:
+	typedef BaseVectorImpl base_type;
+
+  public:
+	void set_all(double x)
+	{
+		gsl_vector_set_all(m_vector, x);
+	}
+
+	void set_basis(size_t i)
+	{
+		gsl_vector_set_basis(m_vector, i);
+	}
+
+	using base_type::operator[];
+
+	double & operator[](size_t i)
+	{
+		return *gsl_vector_ptr(m_vector, i);
+	}
+
+	using base_type::get_gsl_vector;
+
+	gsl_vector* get_gsl_vector()
+	{
+		return m_vector;
+	}
+
+	void swap_elements(size_t i, size_t j)
+	{
+		gsl_vector_swap_elements(m_vector, i, j);
+	}
+
+	void reverse()
+	{
+		gsl_vector_reverse(m_vector);
+	}
+
+	VectorImpl & scale(double x)
+	{
+		gsl_vector_scale(m_vector, x);
+		return (*this);
+	}
+
+	VectorImpl & translate(double x)
+	{
+		gsl_vector_add_constant(m_vector, x);
+		return (*this);
+	}
+
+	VectorImpl & operator+=(base_type const& _vector)
+	{
+		gsl_vector_add(m_vector, _vector.get_gsl_vector());
+		return (*this);
+	}
+
+	VectorImpl & operator-=(base_type const& _vector)
+	{
+		gsl_vector_sub(m_vector, _vector.get_gsl_vector());
+		return (*this);
+	}
+
+};  // end class VectorImpl
+
+}  // end namespace detail
+
+
+using detail::operator==;
+using detail::operator<<;
+
+class Vector : public detail::VectorImpl
+{
+  public:
+	typedef detail::VectorImpl base_type;
+
+  public:
+	Vector(size_t n)
+	{
+		m_size = n;
+		m_vector = gsl_vector_alloc(n);
+	}
+
+	Vector(size_t n, double x)
+	{
+		m_size = n;
+		m_vector = gsl_vector_alloc(n);
+		gsl_vector_set_all(m_vector, x);
+	}
+
+	// create a vector with n elements all set to zero
+	// but the i-th that is set to 1
+	Vector(size_t n, size_t i)
+	{
+		m_size = n;
+		m_vector = gsl_vector_alloc(n);
+		gsl_vector_set_basis(m_vector, i);
+	}
+
+	Vector(Vector const& _vector)
+        : base_type()
+	{
+		m_size = _vector.size();
+		m_vector = gsl_vector_alloc(size());
+		gsl_vector_memcpy(m_vector, _vector.m_vector);
+	}
+
+	explicit
+	Vector(base_type::base_type const& _vector)
+	{
+		m_size = _vector.size();
+		m_vector = gsl_vector_alloc(size());
+		gsl_vector_memcpy(m_vector, _vector.get_gsl_vector());
+	}
+
+	~Vector() override
+	{
+		gsl_vector_free(m_vector);
+	}
+
+
+	Vector & operator=(Vector const& _vector)
+	{
+		assert( size() == _vector.size() );
+		gsl_vector_memcpy(m_vector, _vector.m_vector);
+		return (*this);
+	}
+
+	Vector & operator=(base_type::base_type const& _vector)
+	{
+		assert( size() == _vector.size() );
+		gsl_vector_memcpy(m_vector, _vector.get_gsl_vector());
+		return (*this);
+	}
+
+	Vector & scale(double x)
+	{
+		return static_cast<Vector&>( base_type::scale(x) );
+	}
+
+	Vector & translate(double x)
+	{
+		return static_cast<Vector&>( base_type::translate(x) );
+	}
+
+	Vector & operator+=(base_type::base_type const& _vector)
+	{
+		return static_cast<Vector&>( base_type::operator+=(_vector) );
+	}
+
+	Vector & operator-=(base_type::base_type const& _vector)
+	{
+		return static_cast<Vector&>( base_type::operator-=(_vector) );
+	}
+
+	friend
+	void swap(Vector & v1, Vector & v2);
+	friend
+	void swap_any(Vector & v1, Vector & v2);
+
+}; // end class Vector
+
+
+// warning! these operations invalidate any view of the passed vector objects
+inline
+void swap(Vector & v1, Vector & v2)
+{
+    assert(v1.size() == v2.size());
+    using std::swap;
+    swap(v1.m_vector, v2.m_vector);
+}
+
+inline
+void swap_any(Vector & v1, Vector & v2)
+{
+	using std::swap;
+    swap(v1.m_vector, v2.m_vector);
+    swap(v1.m_size, v2.m_size);
+}
+
+
+class ConstVectorView : public detail::BaseVectorImpl
+{
+  public:
+	typedef detail::BaseVectorImpl base_type;
+
+  public:
+	ConstVectorView(const base_type & _vector, size_t n, size_t offset = 0)
+		: m_vector_view( gsl_vector_const_subvector(_vector.get_gsl_vector(), offset, n) )
+	{
+		m_size = n;
+		m_vector = const_cast<gsl_vector*>( &(m_vector_view.vector) );
+	}
+
+	ConstVectorView(const base_type & _vector, size_t n, size_t offset , size_t stride)
+		: m_vector_view( gsl_vector_const_subvector_with_stride(_vector.get_gsl_vector(), offset, stride, n) )
+	{
+		m_size = n;
+		m_vector = const_cast<gsl_vector*>( &(m_vector_view.vector) );
+	}
+
+    ConstVectorView(const double* _vector, size_t n, size_t offset = 0)
+        : m_vector_view( gsl_vector_const_view_array(_vector + offset, n) )
+    {
+        m_size = n;
+        m_vector = const_cast<gsl_vector*>( &(m_vector_view.vector) );
+    }
+
+    ConstVectorView(const double* _vector, size_t n, size_t offset, size_t stride)
+        : m_vector_view( gsl_vector_const_view_array_with_stride(_vector + offset, stride, n) )
+    {
+        m_size = n;
+        m_vector = const_cast<gsl_vector*>( &(m_vector_view.vector) );
+    }
+
+	explicit
+	ConstVectorView(gsl_vector_const_view  _gsl_vector_view)
+		: m_vector_view(_gsl_vector_view)
+	{
+		m_vector = const_cast<gsl_vector*>( &(m_vector_view.vector) );
+		m_size = m_vector->size;
+	}
+
+    explicit
+    ConstVectorView(const std::vector<double>&  _vector)
+        : m_vector_view( gsl_vector_const_view_array(&(_vector[0]), _vector.size()) )
+    {
+        m_vector = const_cast<gsl_vector*>( &(m_vector_view.vector) );
+        m_size = _vector.size();
+    }
+
+	ConstVectorView(const ConstVectorView & _vector)
+		: base_type(),
+		  m_vector_view(_vector.m_vector_view)
+	{
+		m_size = _vector.size();
+		m_vector = const_cast<gsl_vector*>( &(m_vector_view.vector) );
+	}
+
+	ConstVectorView(const base_type & _vector)
+		: m_vector_view(gsl_vector_const_subvector(_vector.get_gsl_vector(), 0, _vector.size()))
+	{
+		m_size = _vector.size();
+		m_vector = const_cast<gsl_vector*>( &(m_vector_view.vector) );
+	}
+
+  private:
+	gsl_vector_const_view m_vector_view;
+
+}; // end class  ConstVectorView
+
+
+
+
+class VectorView : public detail::VectorImpl
+{
+  public:
+	typedef detail::VectorImpl base_type;
+
+  public:
+	VectorView(base_type & _vector, size_t n, size_t offset = 0, size_t stride = 1)
+	{
+		m_size = n;
+		if (stride == 1)
+		{
+			m_vector_view
+				= gsl_vector_subvector(_vector.get_gsl_vector(), offset, n);
+			m_vector = &(m_vector_view.vector);
+		}
+		else
+		{
+			m_vector_view
+				= gsl_vector_subvector_with_stride(_vector.get_gsl_vector(), offset, stride, n);
+			m_vector = &(m_vector_view.vector);
+		}
+	}
+
+    VectorView(double* _vector, size_t n, size_t offset = 0, size_t stride = 1)
+    {
+        m_size = n;
+        if (stride == 1)
+        {
+            m_vector_view
+                = gsl_vector_view_array(_vector + offset, n);
+            m_vector = &(m_vector_view.vector);
+        }
+        else
+        {
+            m_vector_view
+                = gsl_vector_view_array_with_stride(_vector + offset, stride, n);
+            m_vector = &(m_vector_view.vector);
+        }
+
+    }
+
+	VectorView(const VectorView & _vector)
+        : base_type()
+	{
+		m_size = _vector.size();
+		m_vector_view = _vector.m_vector_view;
+		m_vector = &(m_vector_view.vector);
+	}
+
+	VectorView(Vector & _vector)
+	{
+		m_size = _vector.size();
+		m_vector_view = gsl_vector_subvector(_vector.get_gsl_vector(), 0, size());
+		m_vector = &(m_vector_view.vector);
+	}
+
+	explicit
+	VectorView(gsl_vector_view _gsl_vector_view)
+		: m_vector_view(_gsl_vector_view)
+	{
+		m_vector = &(m_vector_view.vector);
+		m_size = m_vector->size;
+	}
+
+	explicit
+	VectorView(std::vector<double> & _vector)
+	{
+	    m_size = _vector.size();
+	    m_vector_view = gsl_vector_view_array(&(_vector[0]), _vector.size());
+	    m_vector = &(m_vector_view.vector);
+	}
+
+	VectorView & operator=(VectorView const& _vector)
+	{
+		assert( size() == _vector.size() );
+		gsl_vector_memcpy(m_vector, _vector.get_gsl_vector());
+		return (*this);
+	}
+
+	VectorView & operator=(base_type::base_type const& _vector)
+	{
+		assert( size() == _vector.size() );
+		gsl_vector_memcpy(m_vector, _vector.get_gsl_vector());
+		return (*this);
+	}
+
+	VectorView & scale(double x)
+	{
+		return static_cast<VectorView&>( base_type::scale(x) );
+	}
+
+	VectorView & translate(double x)
+	{
+		return static_cast<VectorView&>( base_type::translate(x) );
+	}
+
+	VectorView & operator+=(base_type::base_type const& _vector)
+	{
+		return static_cast<VectorView&>( base_type::operator+=(_vector) );
+	}
+
+	VectorView & operator-=(base_type::base_type const& _vector)
+	{
+		return static_cast<VectorView&>( base_type::operator-=(_vector) );
+	}
+
+	friend
+	void swap_view(VectorView & v1, VectorView & v2);
+
+  private:
+	gsl_vector_view m_vector_view;
+
+}; // end class VectorView
+
+
+inline
+void swap_view(VectorView & v1, VectorView & v2)
+{
+	assert( v1.size() == v2.size() );
+	using std::swap;
+	swap(v1.m_vector_view, v2.m_vector_view); // not swap m_vector too
+}
+
+inline
+const VectorView & const_vector_view_cast (const ConstVectorView & view)
+{
+    const detail::BaseVectorImpl & bvi
+        = static_cast<const detail::BaseVectorImpl &>(view);
+    const VectorView & vv = reinterpret_cast<const VectorView &>(bvi);
+    return vv;
+}
+
+inline
+VectorView & const_vector_view_cast (ConstVectorView & view)
+{
+    detail::BaseVectorImpl & bvi
+        = static_cast<detail::BaseVectorImpl &>(view);
+    VectorView & vv = reinterpret_cast<VectorView &>(bvi);
+    return vv;
+}
+
+
+} } // end namespaces
+
+
+#endif /*_NL_VECTOR_H_*/
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :