--- /dev/null
+/* -*- C++ -*- ------------------------------------------------------------
+
+Copyright (c) 2007 Jesse Anders and Demian Nave http://cmldev.net/
+
+The Configurable Math Library (CML) is distributed under the terms of the
+Boost Software License, v1.0 (see cml/LICENSE for details).
+
+ *-----------------------------------------------------------------------*/
+/** @file
+ * @brief Specializations for external-memory vectors.
+ *
+ * @note Copy-constructing one external<> vector from another is not
+ * supported, since an external<> vector is essentially a wrapper for a
+ * pointer and has no allocated storage of its own.
+ */
+
+#ifndef external_vector_h
+#define external_vector_h
+
+#include <cml/core/external_1D.h>
+#include <cml/vector/vector_expr.h>
+#include <cml/vector/class_ops.h>
+#include <cml/vector/vector_unroller.h>
+#include <cml/vector/dynamic.h>
+
+namespace cml {
+
+/** Fixed-size, fixed-memory vector. */
+template<typename Element, int Size>
+class vector< Element, external<Size> >
+: public external_1D<Element,Size>
+{
+ public:
+
+ /* Shorthand for the generator: */
+ typedef external<> storage_type;
+ typedef external<Size> generator_type;
+
+ /* Shorthand for the array type: */
+ typedef external_1D<Element,Size> array_type;
+
+ /* Shorthand for the type of this vector: */
+ typedef vector<Element,generator_type> vector_type;
+
+ /* For integration into the expression template code: */
+ typedef vector_type expr_type;
+
+ /* For integration into the expression template code: */
+ typedef vector< Element,fixed<Size> > temporary_type;
+ typedef typename temporary_type::subvector_type subvector_type;
+ /* Note: this ensures that an external vector is copied into the proper
+ * temporary; external<> temporaries are not allowed.
+ */
+
+ /* Standard: */
+ typedef typename array_type::value_type value_type;
+ typedef typename array_type::reference reference;
+ typedef typename array_type::const_reference const_reference;
+
+ /* For integration into the expression templates code: */
+ typedef vector_type& expr_reference;
+ typedef const vector_type& expr_const_reference;
+
+ /* For matching by storage type: */
+ typedef typename array_type::memory_tag memory_tag;
+
+ /* For matching by size type: */
+ typedef typename array_type::size_tag size_tag;
+
+ /* For matching by result-type: */
+ typedef cml::et::vector_result_tag result_tag;
+
+ /* For matching by assignability: */
+ typedef cml::et::assignable_tag assignable_tag;
+
+
+ public:
+
+ /** Return square of the length. */
+ value_type length_squared() const {
+ return cml::dot(*this,*this);
+ }
+
+ /** Return the length. */
+ value_type length() const {
+ return std::sqrt(length_squared());
+ }
+
+ /** Normalize the vector. */
+ vector_type& normalize() {
+ return (*this /= length());
+ }
+
+ /** Set this vector to [0]. */
+ vector_type& zero() {
+ typedef cml::et::OpAssign<Element,Element> OpT;
+ cml::et::UnrollAssignment<OpT>(*this,Element(0));
+ return *this;
+ }
+
+ /** Set this vector to a cardinal vector. */
+ vector_type& cardinal(size_t i) {
+ zero();
+ (*this)[i] = Element(1);
+ return *this;
+ }
+
+ /** Pairwise minimum of this vector with another. */
+ template<typename E, class AT>
+ void minimize(const vector<E,AT>& v) {
+ /* XXX This should probably use ScalarPromote: */
+ for (size_t i = 0; i < this->size(); ++i) {
+ (*this)[i] = std::min((*this)[i],v[i]);
+ }
+ }
+
+ /** Pairwise maximum of this vector with another. */
+ template<typename E, class AT>
+ void maximize(const vector<E,AT>& v) {
+ /* XXX This should probably use ScalarPromote: */
+ for (size_t i = 0; i < this->size(); ++i) {
+ (*this)[i] = std::max((*this)[i],v[i]);
+ }
+ }
+
+ /** Fill vector with random elements. */
+ void random(value_type min, value_type max) {
+ for (size_t i = 0; i < this->size(); ++i) {
+ (*this)[i] = cml::random_real(min,max);
+ }
+ }
+
+
+ public:
+
+ /** Construct from an array of values. */
+ vector(Element* const array) : array_type(array) {}
+
+
+ public:
+
+ CML_ASSIGN_VEC_2
+ CML_ASSIGN_VEC_3
+ CML_ASSIGN_VEC_4
+
+ CML_VEC_ASSIGN_FROM_VECTYPE
+
+ /* Only assignment operators can be used to copy from other types: */
+ CML_VEC_ASSIGN_FROM_VEC(=, cml::et::OpAssign)
+ CML_VEC_ASSIGN_FROM_VEC(+=, cml::et::OpAddAssign)
+ CML_VEC_ASSIGN_FROM_VEC(-=, cml::et::OpSubAssign)
+
+ CML_VEC_ASSIGN_FROM_VECXPR(=, cml::et::OpAssign)
+ CML_VEC_ASSIGN_FROM_VECXPR(+=, cml::et::OpAddAssign)
+ CML_VEC_ASSIGN_FROM_VECXPR(-=, cml::et::OpSubAssign)
+
+ CML_VEC_ASSIGN_FROM_SCALAR(*=, cml::et::OpMulAssign)
+ CML_VEC_ASSIGN_FROM_SCALAR(/=, cml::et::OpDivAssign)
+};
+
+/** Run-time sized vector. */
+template<typename Element>
+class vector< Element, external<> >
+: public external_1D<Element>
+{
+ public:
+
+ /* Shorthand for the generator: */
+ typedef external<> storage_type;
+ typedef external<> generator_type;
+
+ /* Shorthand for the array type: */
+ typedef external_1D<Element> array_type;
+
+ /* Shorthand for the type of this vector: */
+ typedef vector<Element,generator_type> vector_type;
+
+ /* For integration into the expression template code: */
+ typedef vector_type expr_type;
+
+ /* For integration into the expression template code: */
+ typedef vector< Element, dynamic<> > temporary_type;
+ /* Note: this ensures that an external vector is copied into the proper
+ * temporary; external<> temporaries are not allowed.
+ */
+
+ /* Standard: */
+ typedef typename array_type::value_type value_type;
+ typedef typename array_type::reference reference;
+ typedef typename array_type::const_reference const_reference;
+
+ /* For integration into the expression templates code: */
+ typedef vector_type& expr_reference;
+ typedef const vector_type& expr_const_reference;
+
+ /* For matching by storage type: */
+ typedef typename array_type::memory_tag memory_tag;
+
+ /* For matching by size type: */
+ typedef typename array_type::size_tag size_tag;
+
+ /* For matching by resizability: */
+ typedef typename array_type::resizing_tag resizing_tag;
+
+ /* For matching by result-type: */
+ typedef cml::et::vector_result_tag result_tag;
+
+ /* For matching by assignability: */
+ typedef cml::et::assignable_tag assignable_tag;
+
+
+ public:
+
+ /** Return square of the length. */
+ value_type length_squared() const {
+ return dot(*this,*this);
+ }
+
+ /** Return the length. */
+ value_type length() const {
+ return std::sqrt(length_squared());
+ }
+
+ /** Normalize the vector. */
+ vector_type& normalize() {
+ return (*this /= length());
+ }
+
+ /** Set this vector to [0]. */
+ vector_type& zero() {
+ typedef cml::et::OpAssign<Element,Element> OpT;
+ cml::et::UnrollAssignment<OpT>(*this,Element(0));
+ return *this;
+ }
+
+ /** Set this vector to a cardinal vector. */
+ vector_type& cardinal(size_t i) {
+ zero();
+ (*this)[i] = Element(1);
+ return *this;
+ }
+
+ /** Pairwise minimum of this vector with another. */
+ template<typename E, class AT>
+ void minimize(const vector<E,AT>& v) {
+ /* XXX This should probably use ScalarPromote: */
+ for (size_t i = 0; i < this->size(); ++i) {
+ (*this)[i] = std::min((*this)[i],v[i]);
+ }
+ }
+
+ /** Pairwise maximum of this vector with another. */
+ template<typename E, class AT>
+ void maximize(const vector<E,AT>& v) {
+ /* XXX This should probably use ScalarPromote: */
+ for (size_t i = 0; i < this->size(); ++i) {
+ (*this)[i] = std::max((*this)[i],v[i]);
+ }
+ }
+
+ /** Fill vector with random elements. */
+ void random(value_type min, value_type max) {
+ for (size_t i = 0; i < this->size(); ++i) {
+ (*this)[i] = random_real(min,max);
+ }
+ }
+
+
+ public:
+
+ /** Construct from an array of values and the size. */
+ vector(Element* const array, size_t size)
+ : array_type(array, size) {}
+
+
+ public:
+
+ /* Define class operators for external vectors. Note: external vectors
+ * cannot be copy-constructed, but they can be assigned to:
+ */
+ CML_ASSIGN_VEC_2
+ CML_ASSIGN_VEC_3
+ CML_ASSIGN_VEC_4
+
+ CML_VEC_ASSIGN_FROM_VECTYPE
+
+ /* Only assignment operators can be used to copy from other types: */
+ CML_VEC_ASSIGN_FROM_VEC(=, cml::et::OpAssign)
+ CML_VEC_ASSIGN_FROM_VEC(+=, cml::et::OpAddAssign)
+ CML_VEC_ASSIGN_FROM_VEC(-=, cml::et::OpSubAssign)
+
+ CML_VEC_ASSIGN_FROM_VECXPR(=, cml::et::OpAssign)
+ CML_VEC_ASSIGN_FROM_VECXPR(+=, cml::et::OpAddAssign)
+ CML_VEC_ASSIGN_FROM_VECXPR(-=, cml::et::OpSubAssign)
+
+ CML_VEC_ASSIGN_FROM_SCALAR(*=, cml::et::OpMulAssign)
+ CML_VEC_ASSIGN_FROM_SCALAR(/=, cml::et::OpDivAssign)
+};
+
+} // namespace cml
+
+#endif
+
+// -------------------------------------------------------------------------
+// vim:ft=cpp
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