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<div class="title">AmbiVector.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// This file is part of Eigen, a lightweight C++ template library</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">// for linear algebra.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Copyright (C) 2008 Gael Guennebaud &lt;gael.guennebaud@inria.fr&gt;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// This Source Code Form is subject to the terms of the Mozilla</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">// Public License v. 2.0. If a copy of the MPL was not distributed</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#ifndef EIGEN_AMBIVECTOR_H</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define EIGEN_AMBIVECTOR_H</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="keyword">namespace </span>Eigen { </div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Scalar, <span class="keyword">typename</span> _Index&gt;</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="keyword">class </span>AmbiVector</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;{</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;    <span class="keyword">typedef</span> _Scalar Scalar;</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;    <span class="keyword">typedef</span> _Index Index;</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    <span class="keyword">typedef</span> <span class="keyword">typename</span> NumTraits&lt;Scalar&gt;::Real RealScalar;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    AmbiVector(Index size)</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;      : m_buffer(0), m_zero(0), m_size(0), m_allocatedSize(0), m_allocatedElements(0), m_mode(-1)</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;    {</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;      resize(size);</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    }</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    <span class="keywordtype">void</span> init(<span class="keywordtype">double</span> estimatedDensity);</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    <span class="keywordtype">void</span> init(<span class="keywordtype">int</span> mode);</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    Index nonZeros() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    <span class="keywordtype">void</span> setBounds(Index start, Index end) { m_start = start; m_end = end; }</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    <span class="keywordtype">void</span> setZero();</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    <span class="keywordtype">void</span> restart();</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;    Scalar&amp; coeffRef(Index i);</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    Scalar&amp; coeff(Index i);</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="keyword">class </span>Iterator;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    ~AmbiVector() { <span class="keyword">delete</span>[] m_buffer; }</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <span class="keywordtype">void</span> resize(Index size)</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    {</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;      <span class="keywordflow">if</span> (m_allocatedSize &lt; size)</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;        reallocate(size);</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;      m_size = size;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    }</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    Index size()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_size; }</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;  <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    <span class="keywordtype">void</span> reallocate(Index size)</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    {</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;      <span class="comment">// if the size of the matrix is not too large, let&#39;s allocate a bit more than needed such</span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;      <span class="comment">// that we can handle dense vector even in sparse mode.</span></div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;      <span class="keyword">delete</span>[] m_buffer;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;      <span class="keywordflow">if</span> (size&lt;1000)</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;      {</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        Index allocSize = (size * <span class="keyword">sizeof</span>(ListEl))/<span class="keyword">sizeof</span>(Scalar);</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;        m_allocatedElements = (allocSize*<span class="keyword">sizeof</span>(Scalar))/<span class="keyword">sizeof</span>(ListEl);</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;        m_buffer = <span class="keyword">new</span> Scalar[allocSize];</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;      }</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;      <span class="keywordflow">else</span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;      {</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        m_allocatedElements = (size*<span class="keyword">sizeof</span>(Scalar))/<span class="keyword">sizeof</span>(ListEl);</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;        m_buffer = <span class="keyword">new</span> Scalar[size];</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;      }</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;      m_size = size;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;      m_start = 0;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;      m_end = m_size;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    }</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    <span class="keywordtype">void</span> reallocateSparse()</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;    {</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;      Index copyElements = m_allocatedElements;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;      m_allocatedElements = (std::min)(Index(m_allocatedElements*1.5),m_size);</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;      Index allocSize = m_allocatedElements * <span class="keyword">sizeof</span>(ListEl);</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;      allocSize = allocSize/<span class="keyword">sizeof</span>(Scalar) + (allocSize%<span class="keyword">sizeof</span>(Scalar)&gt;0?1:0);</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;      Scalar* newBuffer = <span class="keyword">new</span> Scalar[allocSize];</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;      memcpy(newBuffer,  m_buffer,  copyElements * <span class="keyword">sizeof</span>(ListEl));</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;      <span class="keyword">delete</span>[] m_buffer;</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;      m_buffer = newBuffer;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    }</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;  <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    <span class="comment">// element type of the linked list</span></div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <span class="keyword">struct </span>ListEl</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    {</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;      Index next;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;      Index index;</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;      Scalar value;</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    };</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    <span class="comment">// used to store data in both mode</span></div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    Scalar* m_buffer;</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    Scalar m_zero;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    Index m_size;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    Index m_start;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    Index m_end;</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    Index m_allocatedSize;</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    Index m_allocatedElements;</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    Index m_mode;</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;    <span class="comment">// linked list mode</span></div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    Index m_llStart;</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    Index m_llCurrent;</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    Index m_llSize;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;};</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Scalar,<span class="keyword">typename</span> _Index&gt;</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;_Index AmbiVector&lt;_Scalar,_Index&gt;::nonZeros()<span class="keyword"> const</span></div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;  <span class="keywordflow">if</span> (m_mode==IsSparse)</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;    <span class="keywordflow">return</span> m_llSize;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    <span class="keywordflow">return</span> m_end - m_start;</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;}</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Scalar,<span class="keyword">typename</span> _Index&gt;</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;<span class="keywordtype">void</span> AmbiVector&lt;_Scalar,_Index&gt;::init(<span class="keywordtype">double</span> estimatedDensity)</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;{</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;  <span class="keywordflow">if</span> (estimatedDensity&gt;0.1)</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;    init(IsDense);</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    init(IsSparse);</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;}</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Scalar,<span class="keyword">typename</span> _Index&gt;</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;<span class="keywordtype">void</span> AmbiVector&lt;_Scalar,_Index&gt;::init(<span class="keywordtype">int</span> mode)</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;{</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;  m_mode = mode;</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;  <span class="keywordflow">if</span> (m_mode==IsSparse)</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;  {</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    m_llSize = 0;</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    m_llStart = -1;</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;  }</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;}</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Scalar,<span class="keyword">typename</span> _Index&gt;</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="keywordtype">void</span> AmbiVector&lt;_Scalar,_Index&gt;::restart()</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;{</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;  m_llCurrent = m_llStart;</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;}</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Scalar,<span class="keyword">typename</span> _Index&gt;</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;<span class="keywordtype">void</span> AmbiVector&lt;_Scalar,_Index&gt;::setZero()</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;{</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;  <span class="keywordflow">if</span> (m_mode==IsDense)</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;  {</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    <span class="keywordflow">for</span> (Index i=m_start; i&lt;m_end; ++i)</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;      m_buffer[i] = Scalar(0);</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;  }</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;  {</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    eigen_assert(m_mode==IsSparse);</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    m_llSize = 0;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;    m_llStart = -1;</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;  }</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;}</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Scalar,<span class="keyword">typename</span> _Index&gt;</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;_Scalar&amp; AmbiVector&lt;_Scalar,_Index&gt;::coeffRef(_Index i)</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;{</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;  <span class="keywordflow">if</span> (m_mode==IsDense)</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    <span class="keywordflow">return</span> m_buffer[i];</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;  {</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;    ListEl* EIGEN_RESTRICT llElements = <span class="keyword">reinterpret_cast&lt;</span>ListEl*<span class="keyword">&gt;</span>(m_buffer);</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <span class="comment">// TODO factorize the following code to reduce code generation</span></div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    eigen_assert(m_mode==IsSparse);</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;    <span class="keywordflow">if</span> (m_llSize==0)</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;    {</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;      <span class="comment">// this is the first element</span></div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;      m_llStart = 0;</div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;      m_llCurrent = 0;</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;      ++m_llSize;</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;      llElements[0].value = Scalar(0);</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;      llElements[0].index = i;</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;      llElements[0].next = -1;</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;      <span class="keywordflow">return</span> llElements[0].value;</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;    }</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (i&lt;llElements[m_llStart].index)</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;    {</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;      <span class="comment">// this is going to be the new first element of the list</span></div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;      ListEl&amp; el = llElements[m_llSize];</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;      el.value = Scalar(0);</div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;      el.index = i;</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;      el.next = m_llStart;</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;      m_llStart = m_llSize;</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;      ++m_llSize;</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;      m_llCurrent = m_llStart;</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;      <span class="keywordflow">return</span> el.value;</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;    }</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;    <span class="keywordflow">else</span></div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;    {</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;      Index nextel = llElements[m_llCurrent].next;</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;      eigen_assert(i&gt;=llElements[m_llCurrent].index &amp;&amp; <span class="stringliteral">&quot;you must call restart() before inserting an element with lower or equal index&quot;</span>);</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;      <span class="keywordflow">while</span> (nextel &gt;= 0 &amp;&amp; llElements[nextel].index&lt;=i)</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;      {</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;        m_llCurrent = nextel;</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;        nextel = llElements[nextel].next;</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;      }</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;      <span class="keywordflow">if</span> (llElements[m_llCurrent].index==i)</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;      {</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;        <span class="comment">// the coefficient already exists and we found it !</span></div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;        <span class="keywordflow">return</span> llElements[m_llCurrent].value;</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;      }</div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;      <span class="keywordflow">else</span></div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;      {</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;        <span class="keywordflow">if</span> (m_llSize&gt;=m_allocatedElements)</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;        {</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;          reallocateSparse();</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;          llElements = <span class="keyword">reinterpret_cast&lt;</span>ListEl*<span class="keyword">&gt;</span>(m_buffer);</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;        }</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;        eigen_internal_assert(m_llSize&lt;m_allocatedElements &amp;&amp; <span class="stringliteral">&quot;internal error: overflow in sparse mode&quot;</span>);</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;        <span class="comment">// let&#39;s insert a new coefficient</span></div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;        ListEl&amp; el = llElements[m_llSize];</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;        el.value = Scalar(0);</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;        el.index = i;</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;        el.next = llElements[m_llCurrent].next;</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;        llElements[m_llCurrent].next = m_llSize;</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;        ++m_llSize;</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;        <span class="keywordflow">return</span> el.value;</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;      }</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;    }</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;  }</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;}</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;</div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Scalar,<span class="keyword">typename</span> _Index&gt;</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;_Scalar&amp; AmbiVector&lt;_Scalar,_Index&gt;::coeff(_Index i)</div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;{</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;  <span class="keywordflow">if</span> (m_mode==IsDense)</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;    <span class="keywordflow">return</span> m_buffer[i];</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;  {</div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;    ListEl* EIGEN_RESTRICT llElements = <span class="keyword">reinterpret_cast&lt;</span>ListEl*<span class="keyword">&gt;</span>(m_buffer);</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;    eigen_assert(m_mode==IsSparse);</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;    <span class="keywordflow">if</span> ((m_llSize==0) || (i&lt;llElements[m_llStart].index))</div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;    {</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;      <span class="keywordflow">return</span> m_zero;</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;    }</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;    <span class="keywordflow">else</span></div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;    {</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;      Index elid = m_llStart;</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;      <span class="keywordflow">while</span> (elid &gt;= 0 &amp;&amp; llElements[elid].index&lt;i)</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;        elid = llElements[elid].next;</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;      <span class="keywordflow">if</span> (llElements[elid].index==i)</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;        <span class="keywordflow">return</span> llElements[m_llCurrent].value;</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;      <span class="keywordflow">else</span></div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;        <span class="keywordflow">return</span> m_zero;</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;    }</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;  }</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;}</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;</div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Scalar,<span class="keyword">typename</span> _Index&gt;</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;<span class="keyword">class </span>AmbiVector&lt;_Scalar,_Index&gt;::Iterator</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;{</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;    <span class="keyword">typedef</span> _Scalar Scalar;</div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;    <span class="keyword">typedef</span> <span class="keyword">typename</span> NumTraits&lt;Scalar&gt;::Real RealScalar;</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;    Iterator(<span class="keyword">const</span> AmbiVector&amp; vec, <span class="keyword">const</span> RealScalar&amp; epsilon = 0)</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;      : m_vector(vec)</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;    {</div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;      <span class="keyword">using</span> std::abs;</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;      m_epsilon = epsilon;</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;      m_isDense = m_vector.m_mode==IsDense;</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;      <span class="keywordflow">if</span> (m_isDense)</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;      {</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;        m_currentEl = 0;   <span class="comment">// this is to avoid a compilation warning</span></div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;        m_cachedValue = 0; <span class="comment">// this is to avoid a compilation warning</span></div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;        m_cachedIndex = m_vector.m_start-1;</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;        ++(*this);</div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;      }</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;      <span class="keywordflow">else</span></div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;      {</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;        ListEl* EIGEN_RESTRICT llElements = <span class="keyword">reinterpret_cast&lt;</span>ListEl*<span class="keyword">&gt;</span>(m_vector.m_buffer);</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;        m_currentEl = m_vector.m_llStart;</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;        <span class="keywordflow">while</span> (m_currentEl&gt;=0 &amp;&amp; abs(llElements[m_currentEl].value)&lt;=m_epsilon)</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;          m_currentEl = llElements[m_currentEl].next;</div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;        <span class="keywordflow">if</span> (m_currentEl&lt;0)</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;        {</div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;          m_cachedValue = 0; <span class="comment">// this is to avoid a compilation warning</span></div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;          m_cachedIndex = -1;</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;        }</div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;        <span class="keywordflow">else</span></div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;        {</div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;          m_cachedIndex = llElements[m_currentEl].index;</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;          m_cachedValue = llElements[m_currentEl].value;</div>
<div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;        }</div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;      }</div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;    }</div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;</div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;    Index index()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_cachedIndex; }</div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;    Scalar value()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_cachedValue; }</div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;</div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;    <span class="keyword">operator</span> bool()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_cachedIndex&gt;=0; }</div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;</div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;    Iterator&amp; operator++()</div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;    {</div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;      <span class="keyword">using</span> std::abs;</div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;      <span class="keywordflow">if</span> (m_isDense)</div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;      {</div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;        <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;          ++m_cachedIndex;</div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;        } <span class="keywordflow">while</span> (m_cachedIndex&lt;m_vector.m_end &amp;&amp; abs(m_vector.m_buffer[m_cachedIndex])&lt;m_epsilon);</div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;        <span class="keywordflow">if</span> (m_cachedIndex&lt;m_vector.m_end)</div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;          m_cachedValue = m_vector.m_buffer[m_cachedIndex];</div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;        <span class="keywordflow">else</span></div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;          m_cachedIndex=-1;</div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;      }</div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;      <span class="keywordflow">else</span></div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;      {</div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;        ListEl* EIGEN_RESTRICT llElements = <span class="keyword">reinterpret_cast&lt;</span>ListEl*<span class="keyword">&gt;</span>(m_vector.m_buffer);</div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;        <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;          m_currentEl = llElements[m_currentEl].next;</div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;        } <span class="keywordflow">while</span> (m_currentEl&gt;=0 &amp;&amp; abs(llElements[m_currentEl].value)&lt;m_epsilon);</div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;        <span class="keywordflow">if</span> (m_currentEl&lt;0)</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;        {</div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;          m_cachedIndex = -1;</div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;        }</div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;        <span class="keywordflow">else</span></div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;        {</div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;          m_cachedIndex = llElements[m_currentEl].index;</div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;          m_cachedValue = llElements[m_currentEl].value;</div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;        }</div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;      }</div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;      <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;    }</div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;</div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;  <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;    <span class="keyword">const</span> AmbiVector&amp; m_vector; <span class="comment">// the target vector</span></div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;    Index m_currentEl;            <span class="comment">// the current element in sparse/linked-list mode</span></div>
<div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;    RealScalar m_epsilon;       <span class="comment">// epsilon used to prune zero coefficients</span></div>
<div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;    Index m_cachedIndex;          <span class="comment">// current coordinate</span></div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;    Scalar m_cachedValue;       <span class="comment">// current value</span></div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;    <span class="keywordtype">bool</span> m_isDense;             <span class="comment">// mode of the vector</span></div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;};</div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;</div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;} <span class="comment">// end namespace internal</span></div>
<div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;</div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;} <span class="comment">// end namespace Eigen</span></div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;</div>
<div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;<span class="preprocessor">#endif // EIGEN_AMBIVECTOR_H</span></div>
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