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<li class="navelem"><a class="el" href="dir_90ffdbabf412cfdffe6b2193e0ce938a.html">libxrpl</a></li><li class="navelem"><a class="el" href="dir_4cb643486f27a568a0d40f174f670f35.html">protocol</a></li> </ul>
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<div class="headertitle"><div class="title">IOUAmount.cpp</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#include &lt;xrpl/basics/LocalValue.h&gt;</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#include &lt;xrpl/basics/Number.h&gt;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="preprocessor">#include &lt;xrpl/basics/contract.h&gt;</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include &lt;xrpl/beast/utility/Zero.h&gt;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include &lt;xrpl/protocol/IOUAmount.h&gt;</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include &lt;boost/multiprecision/cpp_int.hpp&gt;</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/algorithm.html">algorithm</a>&gt;</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/cstdint.html">cstdint</a>&gt;</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/iterator.html">iterator</a>&gt;</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/limits.html">limits</a>&gt;</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/stdexcept.html">stdexcept</a>&gt;</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/string.html">string</a>&gt;</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/vector.html">vector</a>&gt;</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceripple.html">ripple</a> {</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> </div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="keyword">namespace </span>{</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="comment">// Use a static inside a function to help prevent order-of-initialzation issues</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span>LocalValue&lt;bool&gt;&amp;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span>getStaticSTNumberSwitchover()</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span>{</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">static</span> LocalValue&lt;bool&gt; r{<span class="keyword">true</span>};</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keywordflow">return</span> r;</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span>}</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span>} <span class="comment">// namespace</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="keywordtype">bool</span></div>
<div class="foldopen" id="foldopen00031" data-start="{" data-end="}">
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"><a class="line" href="namespaceripple.html#afa1f08ba17ac61380c442f9f2fa2e7b4"> 31</a></span><a class="code hl_function" href="namespaceripple.html#afa1f08ba17ac61380c442f9f2fa2e7b4">getSTNumberSwitchover</a>()</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span>{</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordflow">return</span> *getStaticSTNumberSwitchover();</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span>}</div>
</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="keywordtype">void</span></div>
<div class="foldopen" id="foldopen00037" data-start="{" data-end="}">
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"><a class="line" href="namespaceripple.html#aad7890687a41d457543a373657c3ba0c"> 37</a></span><a class="code hl_function" href="namespaceripple.html#aad7890687a41d457543a373657c3ba0c">setSTNumberSwitchover</a>(<span class="keywordtype">bool</span> v)</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span>{</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> *getStaticSTNumberSwitchover() = v;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span>}</div>
</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="comment">/* The range for the mantissa when normalized */</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"><a class="line" href="namespaceripple.html#aa857005ce75c6664444a2420a44c7371"> 43</a></span><span class="keyword">static</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a> <span class="keyword">constexpr</span> <a class="code hl_variable" href="namespaceripple.html#aa857005ce75c6664444a2420a44c7371">minMantissa</a> = 1000000000000000ull;</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"><a class="line" href="namespaceripple.html#a63cd5edfd2fd5b04cd3e417bfdccccf1"> 44</a></span><span class="keyword">static</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a> <span class="keyword">constexpr</span> <a class="code hl_variable" href="namespaceripple.html#a63cd5edfd2fd5b04cd3e417bfdccccf1">maxMantissa</a> = 9999999999999999ull;</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="comment">/* The range for the exponent when normalized */</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"><a class="line" href="namespaceripple.html#a56d5b2e9b0ff4b03ae5855af8e2dff67"> 46</a></span><span class="keyword">static</span> <span class="keywordtype">int</span> <span class="keyword">constexpr</span> <a class="code hl_variable" href="namespaceripple.html#a56d5b2e9b0ff4b03ae5855af8e2dff67">minExponent</a> = -96;</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"><a class="line" href="namespaceripple.html#a50ff8bd4d3a6010c3d9406228a998e70"> 47</a></span><span class="keyword">static</span> <span class="keywordtype">int</span> <span class="keyword">constexpr</span> <a class="code hl_variable" href="namespaceripple.html#a50ff8bd4d3a6010c3d9406228a998e70">maxExponent</a> = 80;</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a></div>
<div class="foldopen" id="foldopen00050" data-start="{" data-end="}">
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"><a class="line" href="classripple_1_1IOUAmount.html#adab2635959eab5a38bd62200a538d908"> 50</a></span><a class="code hl_function" href="classripple_1_1IOUAmount.html#adab2635959eab5a38bd62200a538d908">IOUAmount::minPositiveAmount</a>()</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span>{</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordflow">return</span> <a class="code hl_function" href="classripple_1_1IOUAmount.html#a9ad31953488b4fc880a9700da03e2a71">IOUAmount</a>(<a class="code hl_variable" href="namespaceripple.html#aa857005ce75c6664444a2420a44c7371">minMantissa</a>, <a class="code hl_variable" href="namespaceripple.html#a56d5b2e9b0ff4b03ae5855af8e2dff67">minExponent</a>);</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span>}</div>
</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> </div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span><span class="keywordtype">void</span></div>
<div class="foldopen" id="foldopen00056" data-start="{" data-end="}">
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"><a class="line" href="classripple_1_1IOUAmount.html#a6eb0c4cb3891601ef809e13c1088f3fd"> 56</a></span><a class="code hl_function" href="classripple_1_1IOUAmount.html#a6eb0c4cb3891601ef809e13c1088f3fd">IOUAmount::normalize</a>()</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span>{</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> == 0)</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> {</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> *<span class="keyword">this</span> = beast::zero;</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> }</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> </div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="namespaceripple.html#afa1f08ba17ac61380c442f9f2fa2e7b4">getSTNumberSwitchover</a>())</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> {</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <a class="code hl_class" href="classripple_1_1Number.html">Number</a> <span class="keyword">const</span> v{<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a>, <a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>};</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> = v.mantissa();</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> = v.exponent();</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> &gt; <a class="code hl_variable" href="namespaceripple.html#a50ff8bd4d3a6010c3d9406228a998e70">maxExponent</a>)</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> Throw&lt;std::overflow_error&gt;(<span class="stringliteral">&quot;value overflow&quot;</span>);</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> &lt; <a class="code hl_variable" href="namespaceripple.html#a56d5b2e9b0ff4b03ae5855af8e2dff67">minExponent</a>)</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> *<span class="keyword">this</span> = beast::zero;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> }</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> negative = (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> &lt; 0);</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> </div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keywordflow">if</span> (negative)</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> = -<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a>;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> </div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> <span class="keywordflow">while</span> ((<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> &lt; <a class="code hl_variable" href="namespaceripple.html#aa857005ce75c6664444a2420a44c7371">minMantissa</a>) &amp;&amp; (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> &gt; <a class="code hl_variable" href="namespaceripple.html#a56d5b2e9b0ff4b03ae5855af8e2dff67">minExponent</a>))</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> {</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> *= 10;</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> --<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>;</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> }</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> </div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="keywordflow">while</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> &gt; <a class="code hl_variable" href="namespaceripple.html#a63cd5edfd2fd5b04cd3e417bfdccccf1">maxMantissa</a>)</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> {</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> &gt;= <a class="code hl_variable" href="namespaceripple.html#a50ff8bd4d3a6010c3d9406228a998e70">maxExponent</a>)</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> Throw&lt;std::overflow_error&gt;(<span class="stringliteral">&quot;IOUAmount::normalize&quot;</span>);</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> <a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> /= 10;</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> ++<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>;</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> }</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> </div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="keywordflow">if</span> ((<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> &lt; <a class="code hl_variable" href="namespaceripple.html#a56d5b2e9b0ff4b03ae5855af8e2dff67">minExponent</a>) || (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> &lt; <a class="code hl_variable" href="namespaceripple.html#aa857005ce75c6664444a2420a44c7371">minMantissa</a>))</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> {</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> *<span class="keyword">this</span> = beast::zero;</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> }</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> </div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> &gt; <a class="code hl_variable" href="namespaceripple.html#a50ff8bd4d3a6010c3d9406228a998e70">maxExponent</a>)</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> Throw&lt;std::overflow_error&gt;(<span class="stringliteral">&quot;value overflow&quot;</span>);</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="keywordflow">if</span> (negative)</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> = -<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a>;</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span>}</div>
</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> </div>
<div class="foldopen" id="foldopen00109" data-start="{" data-end="}">
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"><a class="line" href="classripple_1_1IOUAmount.html#af346ea69bfcc118ea700e618f32dffc3"> 109</a></span><a class="code hl_function" href="classripple_1_1IOUAmount.html#a9ad31953488b4fc880a9700da03e2a71">IOUAmount::IOUAmount</a>(<a class="code hl_class" href="classripple_1_1Number.html">Number</a> <span class="keyword">const</span>&amp; other)</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> : mantissa_(other.mantissa()), exponent_(other.exponent())</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span>{</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> &gt; <a class="code hl_variable" href="namespaceripple.html#a50ff8bd4d3a6010c3d9406228a998e70">maxExponent</a>)</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> Throw&lt;std::overflow_error&gt;(<span class="stringliteral">&quot;value overflow&quot;</span>);</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> &lt; <a class="code hl_variable" href="namespaceripple.html#a56d5b2e9b0ff4b03ae5855af8e2dff67">minExponent</a>)</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> *<span class="keyword">this</span> = beast::zero;</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span>}</div>
</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> </div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span><a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a>&amp;</div>
<div class="foldopen" id="foldopen00119" data-start="{" data-end="}">
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"><a class="line" href="classripple_1_1IOUAmount.html#a94bdd4a08732aed55054592776aab6f9"> 119</a></span><a class="code hl_function" href="classripple_1_1IOUAmount.html#a94bdd4a08732aed55054592776aab6f9">IOUAmount::operator+=</a>(<a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a> <span class="keyword">const</span>&amp; other)</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span>{</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <span class="keywordflow">if</span> (other == beast::zero)</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> </div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <span class="keywordflow">if</span> (*<span class="keyword">this</span> == beast::zero)</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> {</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> *<span class="keyword">this</span> = other;</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> }</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> </div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="namespaceripple.html#afa1f08ba17ac61380c442f9f2fa2e7b4">getSTNumberSwitchover</a>())</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> {</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> *<span class="keyword">this</span> = <a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a>{<a class="code hl_class" href="classripple_1_1Number.html">Number</a>{*<span class="keyword">this</span>} + <a class="code hl_class" href="classripple_1_1Number.html">Number</a>{other}};</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> }</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> <span class="keyword">auto</span> m = other.<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a>;</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> <span class="keyword">auto</span> e = other.<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>;</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> </div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> <span class="keywordflow">while</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> &lt; e)</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> {</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> <a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> /= 10;</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> ++<a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>;</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> }</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> </div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="keywordflow">while</span> (e &lt; <a class="code hl_variable" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>)</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> {</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> m /= 10;</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> ++e;</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> }</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> </div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> <span class="comment">// This addition cannot overflow an std::int64_t but we may throw from</span></div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> <span class="comment">// normalize if the result isn&#39;t representable.</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> += m;</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> &gt;= -10 &amp;&amp; <a class="code hl_variable" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> &lt;= 10)</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> {</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> *<span class="keyword">this</span> = beast::zero;</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> }</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> </div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> <a class="code hl_function" href="classripple_1_1IOUAmount.html#a6eb0c4cb3891601ef809e13c1088f3fd">normalize</a>();</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span>}</div>
</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span><a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div>
<div class="foldopen" id="foldopen00165" data-start="{" data-end="}">
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"><a class="line" href="namespaceripple.html#a7fdda52cfb8e7dbaed475a5fe6ce58b8"> 165</a></span><a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(<a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a> <span class="keyword">const</span>&amp; amount)</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span>{</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">to_string</a>(<a class="code hl_class" href="classripple_1_1Number.html">Number</a>{amount});</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span>}</div>
</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> </div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span>IOUAmount</div>
<div class="foldopen" id="foldopen00171" data-start="{" data-end="}">
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"><a class="line" href="namespaceripple.html#aaed451aa78786841714de20f3f345f23"> 171</a></span><a class="code hl_function" href="namespaceripple.html#aaed451aa78786841714de20f3f345f23">mulRatio</a>(</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> <a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a> <span class="keyword">const</span>&amp; amt,</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint32_t</a> num,</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint32_t</a> den,</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="keywordtype">bool</span> roundUp)</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span>{</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> <span class="keyword">using namespace </span>boost::multiprecision;</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> </div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> <span class="keywordflow">if</span> (!den)</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> Throw&lt;std::runtime_error&gt;(<span class="stringliteral">&quot;division by zero&quot;</span>);</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> </div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="comment">// A vector with the value 10^index for indexes from 0 to 29</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> <span class="comment">// The largest intermediate value we expect is 2^96, which</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> <span class="comment">// is less than 10^29</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> <span class="keyword">static</span> <span class="keyword">auto</span> <span class="keyword">const</span> powerTable = [] {</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint128_t&gt;</a> result;</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> result.<a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/container/vector/reserve.html">reserve</a>(30); <span class="comment">// 2^96 is largest intermediate result size</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> uint128_t cur(1);</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 30; ++i)</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> {</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> result.<a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/container/vector/push_back.html">push_back</a>(cur);</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> cur *= 10;</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> };</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> <span class="keywordflow">return</span> result;</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> }();</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> </div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> <span class="comment">// Return floor(log10(v))</span></div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> <span class="comment">// Note: Returns -1 for v == 0</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> <span class="keyword">static</span> <span class="keyword">auto</span> log10Floor = [](uint128_t <span class="keyword">const</span>&amp; v) {</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> <span class="comment">// Find the index of the first element &gt;= the requested element, the</span></div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> <span class="comment">// index is the log of the element in the log table.</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span> <span class="keyword">auto</span> <span class="keyword">const</span> l =</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/algorithm/lower_bound.html">std::lower_bound</a>(powerTable.begin(), powerTable.end(), v);</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span> <span class="keywordtype">int</span> index = <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/iterator/distance.html">std::distance</a>(powerTable.begin(), l);</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> <span class="comment">// If we&#39;re not equal, subtract to get the floor</span></div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> <span class="keywordflow">if</span> (*l != v)</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span> --index;</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> <span class="keywordflow">return</span> index;</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> };</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> </div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> <span class="comment">// Return ceil(log10(v))</span></div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> <span class="keyword">static</span> <span class="keyword">auto</span> log10Ceil = [](uint128_t <span class="keyword">const</span>&amp; v) {</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> <span class="comment">// Find the index of the first element &gt;= the requested element, the</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> <span class="comment">// index is the log of the element in the log table.</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> <span class="keyword">auto</span> <span class="keyword">const</span> l =</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> <a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/algorithm/lower_bound.html">std::lower_bound</a>(powerTable.begin(), powerTable.end(), v);</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> <span class="keywordflow">return</span> int(<a class="code hl_functionRef" href="http://en.cppreference.com/w/cpp/iterator/distance.html">std::distance</a>(powerTable.begin(), l));</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> };</div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> </div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span> <span class="keyword">static</span> <span class="keyword">auto</span> <span class="keyword">const</span> fl64 =</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> log10Floor(<a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/numeric_limits.html">std::numeric_limits&lt;std::int64_t&gt;::max</a>());</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> </div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> neg = amt.<a class="code hl_function" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>() &lt; 0;</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> uint128_t <span class="keyword">const</span> den128(den);</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> <span class="comment">// a 32 value * a 64 bit value and stored in a 128 bit value. This will</span></div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span> <span class="comment">// never overflow</span></div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> uint128_t <span class="keyword">const</span> mul =</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> uint128_t(neg ? -amt.<a class="code hl_function" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>() : amt.<a class="code hl_function" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>()) * uint128_t(num);</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> </div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> <span class="keyword">auto</span> low = mul / den128;</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> uint128_t rem(mul - low * den128);</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> </div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> <span class="keywordtype">int</span> exponent = amt.<a class="code hl_function" href="classripple_1_1IOUAmount.html#a4123b52991469e91f146e23382f49d6c">exponent</a>();</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> </div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> <span class="keywordflow">if</span> (rem)</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> {</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span> <span class="comment">// Mathematically, the result is low + rem/den128. However, since this</span></div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> <span class="comment">// uses integer division rem/den128 will be zero. Scale the result so</span></div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span> <span class="comment">// low does not overflow the largest amount we can store in the mantissa</span></div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> <span class="comment">// and (rem/den128) is as large as possible. Scale by multiplying low</span></div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> <span class="comment">// and rem by 10 and subtracting one from the exponent. We could do this</span></div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> <span class="comment">// with a loop, but it&#39;s more efficient to use logarithms.</span></div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> <span class="keyword">auto</span> <span class="keyword">const</span> roomToGrow = fl64 - log10Ceil(low);</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> <span class="keywordflow">if</span> (roomToGrow &gt; 0)</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span> {</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> exponent -= roomToGrow;</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> low *= powerTable[roomToGrow];</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> rem *= powerTable[roomToGrow];</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> }</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span> <span class="keyword">auto</span> <span class="keyword">const</span> addRem = rem / den128;</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span> low += addRem;</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> rem = rem - addRem * den128;</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> }</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> </div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> <span class="comment">// The largest result we can have is ~2^95, which overflows the 64 bit</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span> <span class="comment">// result we can store in the mantissa. Scale result down by dividing by ten</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> <span class="comment">// and adding one to the exponent until the low will fit in the 64-bit</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> <span class="comment">// mantissa. Use logarithms to avoid looping.</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> <span class="keywordtype">bool</span> hasRem = bool(rem);</div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> <span class="keyword">auto</span> <span class="keyword">const</span> mustShrink = log10Ceil(low) - fl64;</div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span> <span class="keywordflow">if</span> (mustShrink &gt; 0)</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> {</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span> uint128_t <span class="keyword">const</span> sav(low);</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> exponent += mustShrink;</div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span> low /= powerTable[mustShrink];</div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span> <span class="keywordflow">if</span> (!hasRem)</div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> hasRem = bool(sav - low * powerTable[mustShrink]);</div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span> }</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span> </div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span> <a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a> mantissa = low.convert_to&lt;<a class="code hl_classRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a>&gt;();</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span> </div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span> <span class="comment">// normalize before rounding</span></div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> <span class="keywordflow">if</span> (neg)</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span> mantissa *= -1;</div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span> </div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span> <a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a> result(mantissa, exponent);</div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> </div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> <span class="keywordflow">if</span> (hasRem)</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span> {</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span> <span class="comment">// handle rounding</span></div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> <span class="keywordflow">if</span> (roundUp &amp;&amp; !neg)</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span> {</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> <span class="keywordflow">if</span> (!result)</div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> {</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> <span class="keywordflow">return</span> <a class="code hl_function" href="classripple_1_1IOUAmount.html#adab2635959eab5a38bd62200a538d908">IOUAmount::minPositiveAmount</a>();</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> }</div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span> <span class="comment">// This addition cannot overflow because the mantissa is already</span></div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> <span class="comment">// normalized</span></div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span> <span class="keywordflow">return</span> <a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a>(result.<a class="code hl_function" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>() + 1, result.<a class="code hl_function" href="classripple_1_1IOUAmount.html#a4123b52991469e91f146e23382f49d6c">exponent</a>());</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span> }</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span> </div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> <span class="keywordflow">if</span> (!roundUp &amp;&amp; neg)</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> {</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span> <span class="keywordflow">if</span> (!result)</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span> {</div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span> <span class="keywordflow">return</span> <a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a>(-<a class="code hl_variable" href="namespaceripple.html#aa857005ce75c6664444a2420a44c7371">minMantissa</a>, <a class="code hl_variable" href="namespaceripple.html#a56d5b2e9b0ff4b03ae5855af8e2dff67">minExponent</a>);</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span> }</div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span> <span class="comment">// This subtraction cannot underflow because `result` is not zero</span></div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span> <span class="keywordflow">return</span> <a class="code hl_class" href="classripple_1_1IOUAmount.html">IOUAmount</a>(result.<a class="code hl_function" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>() - 1, result.<a class="code hl_function" href="classripple_1_1IOUAmount.html#a4123b52991469e91f146e23382f49d6c">exponent</a>());</div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span> }</div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"> 301</span> }</div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span> </div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span> <span class="keywordflow">return</span> result;</div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span>}</div>
</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> </div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span>} <span class="comment">// namespace ripple</span></div>
<div class="ttc" id="aalgorithm_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/algorithm.html">algorithm</a></div></div>
<div class="ttc" id="abasic_string_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div></div>
<div class="ttc" id="aclassripple_1_1IOUAmount_html"><div class="ttname"><a href="classripple_1_1IOUAmount.html">ripple::IOUAmount</a></div><div class="ttdoc">Floating point representation of amounts with high dynamic range.</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8h_source.html#l00025">IOUAmount.h:27</a></div></div>
<div class="ttc" id="aclassripple_1_1IOUAmount_html_a4123b52991469e91f146e23382f49d6c"><div class="ttname"><a href="classripple_1_1IOUAmount.html#a4123b52991469e91f146e23382f49d6c">ripple::IOUAmount::exponent</a></div><div class="ttdeci">int exponent() const noexcept</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8h_source.html#l00153">IOUAmount.h:153</a></div></div>
<div class="ttc" id="aclassripple_1_1IOUAmount_html_a44f1b32037a68e67d02237a170c5425b"><div class="ttname"><a href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">ripple::IOUAmount::mantissa_</a></div><div class="ttdeci">std::int64_t mantissa_</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8h_source.html#l00029">IOUAmount.h:29</a></div></div>
<div class="ttc" id="aclassripple_1_1IOUAmount_html_a6eb0c4cb3891601ef809e13c1088f3fd"><div class="ttname"><a href="classripple_1_1IOUAmount.html#a6eb0c4cb3891601ef809e13c1088f3fd">ripple::IOUAmount::normalize</a></div><div class="ttdeci">void normalize()</div><div class="ttdoc">Adjusts the mantissa and exponent to the proper range.</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00056">IOUAmount.cpp:56</a></div></div>
<div class="ttc" id="aclassripple_1_1IOUAmount_html_a7569b6462cf1abb6018ccfbe8428bfab"><div class="ttname"><a href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">ripple::IOUAmount::mantissa</a></div><div class="ttdeci">std::int64_t mantissa() const noexcept</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8h_source.html#l00159">IOUAmount.h:159</a></div></div>
<div class="ttc" id="aclassripple_1_1IOUAmount_html_a94bdd4a08732aed55054592776aab6f9"><div class="ttname"><a href="classripple_1_1IOUAmount.html#a94bdd4a08732aed55054592776aab6f9">ripple::IOUAmount::operator+=</a></div><div class="ttdeci">IOUAmount &amp; operator+=(IOUAmount const &amp;other)</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00119">IOUAmount.cpp:119</a></div></div>
<div class="ttc" id="aclassripple_1_1IOUAmount_html_a9ad31953488b4fc880a9700da03e2a71"><div class="ttname"><a href="classripple_1_1IOUAmount.html#a9ad31953488b4fc880a9700da03e2a71">ripple::IOUAmount::IOUAmount</a></div><div class="ttdeci">IOUAmount()=default</div></div>
<div class="ttc" id="aclassripple_1_1IOUAmount_html_adab2635959eab5a38bd62200a538d908"><div class="ttname"><a href="classripple_1_1IOUAmount.html#adab2635959eab5a38bd62200a538d908">ripple::IOUAmount::minPositiveAmount</a></div><div class="ttdeci">static IOUAmount minPositiveAmount()</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00050">IOUAmount.cpp:50</a></div></div>
<div class="ttc" id="aclassripple_1_1IOUAmount_html_aea9cd345c8da57dbbd2372ff434bfb23"><div class="ttname"><a href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">ripple::IOUAmount::exponent_</a></div><div class="ttdeci">int exponent_</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8h_source.html#l00030">IOUAmount.h:30</a></div></div>
<div class="ttc" id="aclassripple_1_1Number_html"><div class="ttname"><a href="classripple_1_1Number.html">ripple::Number</a></div><div class="ttdef"><b>Definition</b> <a href="Number_8h_source.html#l00016">Number.h:17</a></div></div>
<div class="ttc" id="acstdint_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/cstdint.html">cstdint</a></div></div>
<div class="ttc" id="adistance_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/iterator/distance.html">std::distance</a></div><div class="ttdeci">T distance(T... args)</div></div>
<div class="ttc" id="ainteger_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a></div></div>
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<div class="ttc" id="alimits_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/limits.html">limits</a></div></div>
<div class="ttc" id="alower_bound_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/lower_bound.html">std::lower_bound</a></div><div class="ttdeci">T lower_bound(T... args)</div></div>
<div class="ttc" id="anamespaceripple_html"><div class="ttname"><a href="namespaceripple.html">ripple</a></div><div class="ttdoc">Use hash_* containers for keys that do not need a cryptographically secure hashing algorithm.</div><div class="ttdef"><b>Definition</b> <a href="algorithm_8h_source.html#l00006">algorithm.h:6</a></div></div>
<div class="ttc" id="anamespaceripple_html_a50ff8bd4d3a6010c3d9406228a998e70"><div class="ttname"><a href="namespaceripple.html#a50ff8bd4d3a6010c3d9406228a998e70">ripple::maxExponent</a></div><div class="ttdeci">static int constexpr maxExponent</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00047">IOUAmount.cpp:47</a></div></div>
<div class="ttc" id="anamespaceripple_html_a56d5b2e9b0ff4b03ae5855af8e2dff67"><div class="ttname"><a href="namespaceripple.html#a56d5b2e9b0ff4b03ae5855af8e2dff67">ripple::minExponent</a></div><div class="ttdeci">static int constexpr minExponent</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00046">IOUAmount.cpp:46</a></div></div>
<div class="ttc" id="anamespaceripple_html_a63cd5edfd2fd5b04cd3e417bfdccccf1"><div class="ttname"><a href="namespaceripple.html#a63cd5edfd2fd5b04cd3e417bfdccccf1">ripple::maxMantissa</a></div><div class="ttdeci">static std::int64_t constexpr maxMantissa</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00044">IOUAmount.cpp:44</a></div></div>
<div class="ttc" id="anamespaceripple_html_aa857005ce75c6664444a2420a44c7371"><div class="ttname"><a href="namespaceripple.html#aa857005ce75c6664444a2420a44c7371">ripple::minMantissa</a></div><div class="ttdeci">static std::int64_t constexpr minMantissa</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00043">IOUAmount.cpp:43</a></div></div>
<div class="ttc" id="anamespaceripple_html_aad7890687a41d457543a373657c3ba0c"><div class="ttname"><a href="namespaceripple.html#aad7890687a41d457543a373657c3ba0c">ripple::setSTNumberSwitchover</a></div><div class="ttdeci">void setSTNumberSwitchover(bool v)</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00037">IOUAmount.cpp:37</a></div></div>
<div class="ttc" id="anamespaceripple_html_aaed451aa78786841714de20f3f345f23"><div class="ttname"><a href="namespaceripple.html#aaed451aa78786841714de20f3f345f23">ripple::mulRatio</a></div><div class="ttdeci">IOUAmount mulRatio(IOUAmount const &amp;amt, std::uint32_t num, std::uint32_t den, bool roundUp)</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00171">IOUAmount.cpp:171</a></div></div>
<div class="ttc" id="anamespaceripple_html_ac124fe6744b7fe887dec949b56b16d50"><div class="ttname"><a href="namespaceripple.html#ac124fe6744b7fe887dec949b56b16d50">ripple::to_string</a></div><div class="ttdeci">std::string to_string(base_uint&lt; Bits, Tag &gt; const &amp;a)</div><div class="ttdef"><b>Definition</b> <a href="base__uint_8h_source.html#l00611">base_uint.h:611</a></div></div>
<div class="ttc" id="anamespaceripple_html_afa1f08ba17ac61380c442f9f2fa2e7b4"><div class="ttname"><a href="namespaceripple.html#afa1f08ba17ac61380c442f9f2fa2e7b4">ripple::getSTNumberSwitchover</a></div><div class="ttdeci">bool getSTNumberSwitchover()</div><div class="ttdef"><b>Definition</b> <a href="IOUAmount_8cpp_source.html#l00031">IOUAmount.cpp:31</a></div></div>
<div class="ttc" id="anumeric_limits_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/numeric_limits.html">std::numeric_limits</a></div></div>
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<div class="ttc" id="areserve_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/reserve.html">std::vector::reserve</a></div><div class="ttdeci">T reserve(T... args)</div></div>
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