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Lib/Include/CML/core/fixed_1D.h

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+/* -*- 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
+ */
+
+#ifndef fixed_1D_h
+#define fixed_1D_h
+
+#include <cml/core/common.h>
+#include <cml/core/cml_meta.h>
+#include <cml/core/cml_assert.h>
+#include <cml/fixed.h>
+
+namespace cml {
+
+/** Statically-allocated array.
+ *
+ * @note This class is designed to have the same size as a C array with the
+ * same length.  It's therefore possible (but not recommended!) to coerce
+ * a normal C array into a fixed_1D<> like this:
+ *
+ * typedef fixed_1D<double,10> array;
+ * double c_array[10];
+ * array& array_object = *((array*)&c_array);
+ * double e1 = array_object[1];
+ *
+ * It's also possible to do this with a pointer to an array of values (e.g. a
+ * double*), whether or not it was actually declared as a fixed C array.  This
+ * is HIGHLY DISCOURAGED, though. It's relatively straightforward to implement
+ * a separate class to take a C array (or pointer) and turn it into an array
+ * object.
+ *
+ * @sa cml::fixed
+ *
+ * @internal Do <em>not</em> add the empty constructor and destructor; at
+ * least one compiler (Intel C++ 9.0) fails to optimize them away, and they
+ * aren't needed anyway here.
+ */
+template<typename Element, int Size>
+class fixed_1D
+{
+  public:
+
+    /* Require Size > 0: */
+    CML_STATIC_REQUIRE(Size > 0);
+
+    /* Record the generator: */
+    typedef fixed<Size,-1> generator_type;
+
+    /* Standard: */
+    typedef Element value_type;
+    typedef Element* pointer;
+    typedef Element& reference;
+    typedef const Element& const_reference;
+    typedef const Element* const_pointer;
+
+    /* Array implementation: */
+    typedef value_type array_impl[Size];
+
+    /* For matching by memory type: */
+    typedef fixed_memory_tag memory_tag;
+
+    /* For matching by size type: */
+    typedef fixed_size_tag size_tag;
+
+    /* For matching by resizability: */
+    typedef not_resizable_tag resizing_tag;
+
+    /* For matching by dimensions: */
+    typedef oned_tag dimension_tag;
+
+
+  public:
+
+    /** The length as an enumerated value. */
+    enum { array_size = Size };
+
+
+  public:
+
+    /** Return the number of elements in the array. */
+    size_t size() const { return size_t(array_size); }
+
+    /** Access to the data as a C array.
+     *
+     * @param i a size_t index into the array.
+     * @return a mutable reference to the array value at i.
+     *
+     * @note This function does not range-check the argument.
+     */
+    reference operator[](size_t i) { return m_data[i]; }
+
+    /** Const access to the data as a C array.
+     *
+     * @param i a size_t index into the array.
+     * @return a const reference to the array value at i.
+     *
+     * @note This function does not range-check the argument.
+     */
+    const_reference operator[](size_t i) const { return m_data[i]; }
+
+    /** Return access to the data as a raw pointer. */
+    pointer data() { return &m_data[0]; }
+
+    /** Return access to the data as a raw pointer. */
+    const_pointer data() const { return &m_data[0]; }
+
+  protected:
+
+    fixed_1D() {}
+
+
+  protected:
+
+    array_impl                  m_data;
+
+
+  private:
+
+    fixed_1D& operator=(const fixed_1D&);
+};
+
+} // namespace cml
+
+#endif
+
+// -------------------------------------------------------------------------
+// vim:ft=cpp