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289 lines
8.7 KiB
HTML
289 lines
8.7 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta name="generator" content=
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"HTML Tidy for Linux/x86 (vers 1st March 2004), see www.w3.org" />
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<meta http-equiv="Content-Type" content=
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"text/html; charset=us-ascii" />
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<link rel="stylesheet" href="../../../../boost.css" type="text/css"/>
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<link rel="stylesheet" href="ublas.css" type="text/css" />
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<script type="text/javascript" src="js/jquery-1.3.2.min.js" async="async" ></script>
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<script type="text/javascript" src="js/jquery.toc-gw.js" async="async" ></script>
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<title>Sparse Storage</title>
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</head>
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<body>
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<h1><img src="../../../../boost.png" align="middle" />Sparse Storage</h1>
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<div class="toc" id="toc"></div>
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<h2><a name="map_std"></a>Default Standard Map</h2>
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<h4>Description</h4>
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<p>The templated class <code>map_std<I, T, ALLOC></code> provides a
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wrapper for the standard library associative container
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<code>std::map</code>. The wrapper has one simple purpose. It
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allows the definition of a default template parameter (for the
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adapted array) when declaring the sparse container types.</p>
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<h4>Example</h4>
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<pre>
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#include <boost/numeric/ublas/storage_sparse.hpp>
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int main () {
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using namespace boost::numeric::ublas;
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map_std<int, double> a (3);
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for (unsigned i = 0; i < a.size (); ++ i) {
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a [i] = i;
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std::cout << a [i] << std::endl;
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}
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}
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</pre>
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<h4>Definition</h4>
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<p>Defined in the header storage_sparse.hpp.</p>
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<h4>Template parameters</h4>
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<table border="1" summary="parameters">
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<tbody>
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<tr>
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<th>Parameter</th>
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<th>Description</th>
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<th>Default</th>
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</tr>
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<tr>
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<td><code>I</code></td>
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<td>The type of index stored in the array.</td>
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<td></td>
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</tr>
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<tr>
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<td><code>T</code></td>
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<td>The type of object stored in the array.</td>
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<td></td>
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</tr>
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<tr>
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<td><code>ALLOC</code></td>
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<td>An STL Allocator</td>
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<td>std::allocator</td>
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</tr>
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</tbody>
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</table>
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<h4>Model of</h4>
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<p>Reversible Container.</p>
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<h4>Type requirements</h4>
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<p>None, except for those imposed by the requirements of Reversible
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Container.</p>
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<h4>Public base classes</h4>
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<p>std::map</p>
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<h2><a name="map_array"></a>Map Array</h2>
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<h4>Description</h4>
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<p>The templated class <code>map_array<I, T, ALLOC></code> implements a <code>std::map</code> like associative container as a sorted array. It therefore some of the Associative Container interface without having the same semantics as an std::map.
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<p>At any time the <code>map_array</code> has a capacity up to which new element can be inserted.
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If <code>insert</code> would cause the size of the <code>map_array</code> to exceeds its capactity then it is <strong>reallocated</strong>. Iterators and reference are invalidated.
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The capacity can be directly control using the <code>reserve</code> member function.
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</p>
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<h4>Example</h4>
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<pre>
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#include <boost/numeric/ublas/storage_sparse.hpp>
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int main () {
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using namespace boost::numeric::ublas;
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map_array<int, double> a (3);
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for (unsigned i = 0; i < a.size (); ++ i) {
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a [i] = i;
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std::cout << a [i] << std::endl;
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}
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}
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</pre>
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<h4>Definition</h4>
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<p>Defined in the header storage_sparse.hpp.</p>
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<h4>Template parameters</h4>
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<table border="1" summary="parameters">
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<tbody>
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<tr>
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<th>Parameter</th>
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<th>Description</th>
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<th>Default</th>
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</tr>
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<tr>
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<td><code>I</code></td>
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<td>The type of index stored in the array.</td>
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<td></td>
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</tr>
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<tr>
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<td><code>T</code></td>
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<td>The type of object stored in the array.</td>
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<td></td>
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</tr>
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<tr>
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<td><code>ALLOC</code></td>
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<td>An STL Allocator</td>
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<td>std::allocator</td>
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</tr>
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</tbody>
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</table>
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<h4>Model of</h4>
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<p>Reversible Container.</p>
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<h4>Type requirements</h4>
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<p>None, except for those imposed by the requirements of Reversible
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Container.</p>
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<h4>Public base classes</h4>
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<p>None.</p>
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<h4>Members</h4>
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<table border="1" summary="members">
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<tbody>
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<tr>
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<th>Member</th>
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<th>Description</th>
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</tr>
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<tr>
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<td><code>map_array (ALLOC &a = ALLOC())</code></td>
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<td>Allocates a <code>map_array</code> that holds at most zero
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elements.</td>
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</tr>
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<tr>
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<td><code>map_array (const map_array &c)</code></td>
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<td>The copy constructor.</td>
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</tr>
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<tr>
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<td><code>~map_array ()</code></td>
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<td>Deallocates the <code>map_array</code> itself.</td>
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</tr>
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<tr>
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<td><code>void reserve (size_type capacity)</code></td>
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<td>
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Changes the<code>map_array</code> capacity. It can hold at most<code>capacity</code> elements without reallocation. The capacity can be reduced such that <code>capacity >= size()</code>. The content of the<code>map_array</code> is preserved.</td>
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</tr>
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<tr>
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<td><code>size_type size () const</code></td>
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<td>Returns the size of the <code>map_array</code>.</td>
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</tr>
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<tr>
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<td><code>size_type size () const</code></td>
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<td>Returns the capacity of the <code>map_array</code>.</td>
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</tr>
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<tr>
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<td><code>data_reference operator [] (index_type i)</code></td>
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<td>Returns a reference of the element that is associated with a
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particular index. If the <code>map_array</code> does not already
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contain such an element, <code>operator[]</code> inserts the
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default <code>T ()</code>.</td>
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</tr>
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<tr>
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<td><code>map_array &operator = (const map_array
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&a)</code></td>
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<td>The assignment operator.</td>
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</tr>
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<tr>
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<td><code>map_array &assign_temporary (map_array
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&a)</code></td>
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<td>Assigns a temporary. May change the array <code>a</code>.</td>
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</tr>
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<tr>
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<td><code>void swap (map_array &a)</code></td>
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<td>Swaps the contents of the arrays.</td>
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</tr>
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<tr>
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<td><code>std::pair<iterator, bool> insert (const value_type
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&p)</code></td>
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<td>Inserts <code>p</code> into the array. The second part of the return value is <code>true</code>
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if <code>p</code> was inserted and <code>false</code> if was not inserted because it was aleady
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present.</td>
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</tr>
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<tr>
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<td><code>iterator insert (iterator it, const value_type
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&p)</code></td>
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<td>Inserts <code>p</code> into the array, using <code>it</code> as
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a hint to where it will be inserted.</td>
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</tr>
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<tr>
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<td><code>void erase (iterator it)</code></td>
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<td>Erases the value at <code>it</code>.</td>
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</tr>
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<tr>
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<td><code>void clear ()</code></td>
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<td>Clears the array.</td>
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</tr>
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<tr>
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<td><code>const_iterator find (index_type i) const</code></td>
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<td>Finds an element whose index is <code>i</code>.</td>
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</tr>
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<tr>
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<td><code>iterator find (index_type i)</code></td>
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<td>Finds an element whose index is <code>i</code>.</td>
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</tr>
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<tr>
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<td><code>const_iterator lower_bound (index_type i)
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const</code></td>
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<td>Finds the first element whose index is not less than
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<code>i</code> .</td>
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</tr>
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<tr>
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<td><code>iterator lower_bound (index_type i)</code></td>
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<td>Finds the first element whose index is not less than
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<code>i</code> .</td>
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</tr>
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<tr>
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<td><code>const_iterator upper_bound (index_type i)
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const</code></td>
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<td>Finds the first element whose index is greater than
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<code>i</code> .</td>
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</tr>
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<tr>
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<td><code>iterator upper_bound (index_type i)</code></td>
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<td>Finds the first element whose index is greater than
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<code>i</code> .</td>
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</tr>
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<tr>
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<td><code>const_iterator begin () const</code></td>
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<td>Returns a <code>const_iterator</code> pointing to the beginning
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of the <code>map_array</code>.</td>
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</tr>
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<tr>
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<td><code>const_iterator end () const</code></td>
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<td>Returns a <code>const_iterator</code> pointing to the end of
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the <code>map_array</code>.</td>
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</tr>
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<tr>
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<td><code>iterator begin ()</code></td>
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<td>Returns a <code>iterator</code> pointing to the beginning of
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the <code>map_array</code>.</td>
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</tr>
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<tr>
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<td><code>iterator end ()</code></td>
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<td>Returns a <code>iterator</code> pointing to the end of the
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<code>map_array</code>.</td>
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</tr>
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<tr>
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<td><code>const_reverse_iterator rbegin () const</code></td>
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<td>Returns a <code>const_reverse_iterator</code> pointing to the
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beginning of the reversed <code>map_array</code>.</td>
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</tr>
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<tr>
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<td><code>const_reverse_iterator rend () const</code></td>
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<td>Returns a <code>const_reverse_iterator</code> pointing to the
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end of the reversed <code>map_array</code>.</td>
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</tr>
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<tr>
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<td><code>reverse_iterator rbegin ()</code></td>
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<td>Returns a <code>reverse_iterator</code> pointing to the
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beginning of the reversed <code>map_array</code>.</td>
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</tr>
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<tr>
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<td><code>reverse_iterator rend ()</code></td>
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<td>Returns a <code>reverse_iterator</code> pointing to the end of
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the reversed <code>map_array</code>.</td>
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</tr>
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</tbody>
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</table>
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<hr />
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<p>Copyright (©) 2000-2002 Joerg Walter, Mathias Koch<br />
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Use, modification and distribution are subject to the
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Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt
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or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">
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http://www.boost.org/LICENSE_1_0.txt
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</a>).
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</p>
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<script type="text/javascript">
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