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<li class="navelem"><a class="el" href="dir_df9c78dcf3f59a33b12284f95992a64b.html">ripple</a></li><li class="navelem"><a class="el" href="dir_5f536ab1985a8dcd28bcfd618bc58e92.html">basics</a></li><li class="navelem"><a class="el" href="dir_6f921693cf6aba7edd915fbfc33f741e.html">impl</a></li> </ul>
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<div class="title">IOUAmount.cpp</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//------------------------------------------------------------------------------</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> This file is part of rippled: https://github.com/ripple/rippled</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Copyright (c) 2012, 2013 Ripple Labs Inc.</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> Permission to use, copy, modify, and/or distribute this software for any</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> purpose with or without fee is hereby granted, provided that the above</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> copyright notice and this permission notice appear in all copies.</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">*/</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">//==============================================================================</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <ripple/basics/IOUAmount.h></span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <ripple/basics/contract.h></span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <boost/multiprecision/cpp_int.hpp></span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/algorithm.html">algorithm</a>></span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/iterator.html">iterator</a>></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/numeric.html">numeric</a>></span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/stdexcept.html">stdexcept</a>></span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">namespace </span><a class="code" href="namespaceripple.html">ripple</a> {</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">namespace </span>{</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  </div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">// Use a static inside a function to help prevent order-of-initialzation issues</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> LocalValue<bool>&</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> getStaticSTNumberSwitchover()</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> {</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keyword">static</span> LocalValue<bool> r{<span class="keyword">true</span>};</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">return</span> r;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> }</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> } <span class="comment">// namespace</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keywordtype">bool</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="namespaceripple.html#afa1f08ba17ac61380c442f9f2fa2e7b4"> 42</a></span> <a class="code" href="namespaceripple.html#afa1f08ba17ac61380c442f9f2fa2e7b4">getSTNumberSwitchover</a>()</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> {</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordflow">return</span> *getStaticSTNumberSwitchover();</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> }</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="namespaceripple.html#aad7890687a41d457543a373657c3ba0c"> 48</a></span> <a class="code" href="namespaceripple.html#aad7890687a41d457543a373657c3ba0c">setSTNumberSwitchover</a>(<span class="keywordtype">bool</span> v)</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> {</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  *getStaticSTNumberSwitchover() = v;</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> }</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  </div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">/* The range for the mantissa when normalized */</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="namespaceripple.html#afee293b11beff5e74fa2134b0cac6c98"> 54</a></span> <span class="keyword">static</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a> constexpr <a class="code" href="namespaceripple.html#afee293b11beff5e74fa2134b0cac6c98">minMantissa</a> = 1000000000000000ull;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"><a class="line" href="namespaceripple.html#ab58b057b415c6cdbd520b10b674c1ef7"> 55</a></span> <span class="keyword">static</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a> constexpr <a class="code" href="namespaceripple.html#ab58b057b415c6cdbd520b10b674c1ef7">maxMantissa</a> = 9999999999999999ull;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">/* The range for the exponent when normalized */</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="namespaceripple.html#a9122139b3d842cbd49c53fc2ab4f22d6"> 57</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> constexpr <a class="code" href="namespaceripple.html#a9122139b3d842cbd49c53fc2ab4f22d6">minExponent</a> = -96;</div>
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<div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="namespaceripple.html#a94ef69e98ce6b796145b0be2974cb2b6"> 58</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> constexpr <a class="code" href="namespaceripple.html#a94ef69e98ce6b796145b0be2974cb2b6">maxExponent</a> = 80;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a></div>
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<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classripple_1_1IOUAmount.html#adab2635959eab5a38bd62200a538d908"> 61</a></span> <a class="code" href="classripple_1_1IOUAmount.html#adab2635959eab5a38bd62200a538d908">IOUAmount::minPositiveAmount</a>()</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> {</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> <a class="code" href="classripple_1_1IOUAmount.html#a9ad31953488b4fc880a9700da03e2a71">IOUAmount</a>(<a class="code" href="namespaceripple.html#afee293b11beff5e74fa2134b0cac6c98">minMantissa</a>, <a class="code" href="namespaceripple.html#a9122139b3d842cbd49c53fc2ab4f22d6">minExponent</a>);</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> }</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="classripple_1_1IOUAmount.html#a6eb0c4cb3891601ef809e13c1088f3fd"> 67</a></span> <a class="code" href="classripple_1_1IOUAmount.html#a6eb0c4cb3891601ef809e13c1088f3fd">IOUAmount::normalize</a>()</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> {</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">if</span> (<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> == 0)</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  {</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  *<span class="keyword">this</span> = beast::zero;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  }</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceripple.html#afa1f08ba17ac61380c442f9f2fa2e7b4">getSTNumberSwitchover</a>())</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  {</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <a class="code" href="classripple_1_1Number.html">Number</a> <span class="keyword">const</span> v{<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a>, <a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>};</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> = v.mantissa();</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> = v.exponent();</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">if</span> (<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> > <a class="code" href="namespaceripple.html#a94ef69e98ce6b796145b0be2974cb2b6">maxExponent</a>)</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  Throw<std::overflow_error>(<span class="stringliteral">"value overflow"</span>);</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> (<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> < <a class="code" href="namespaceripple.html#a9122139b3d842cbd49c53fc2ab4f22d6">minExponent</a>)</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  *<span class="keyword">this</span> = beast::zero;</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordtype">bool</span> <span class="keyword">const</span> negative = (<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> < 0);</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  </div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">if</span> (negative)</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> = -<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a>;</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  </div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">while</span> ((<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> < <a class="code" href="namespaceripple.html#afee293b11beff5e74fa2134b0cac6c98">minMantissa</a>) && (<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> > <a class="code" href="namespaceripple.html#a9122139b3d842cbd49c53fc2ab4f22d6">minExponent</a>))</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  {</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> *= 10;</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  --<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>;</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  </div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">while</span> (<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> > <a class="code" href="namespaceripple.html#ab58b057b415c6cdbd520b10b674c1ef7">maxMantissa</a>)</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  {</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> >= <a class="code" href="namespaceripple.html#a94ef69e98ce6b796145b0be2974cb2b6">maxExponent</a>)</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  Throw<std::overflow_error>(<span class="stringliteral">"IOUAmount::normalize"</span>);</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  </div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> /= 10;</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  ++<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>;</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  </div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">if</span> ((<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> < <a class="code" href="namespaceripple.html#a9122139b3d842cbd49c53fc2ab4f22d6">minExponent</a>) || (<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> < <a class="code" href="namespaceripple.html#afee293b11beff5e74fa2134b0cac6c98">minMantissa</a>))</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  {</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  *<span class="keyword">this</span> = beast::zero;</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">if</span> (<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> > <a class="code" href="namespaceripple.html#a94ef69e98ce6b796145b0be2974cb2b6">maxExponent</a>)</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  Throw<std::overflow_error>(<span class="stringliteral">"value overflow"</span>);</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  </div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">if</span> (negative)</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> = -<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a>;</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> }</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  </div>
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<div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="classripple_1_1IOUAmount.html#af346ea69bfcc118ea700e618f32dffc3"> 120</a></span> <a class="code" href="classripple_1_1IOUAmount.html#a9ad31953488b4fc880a9700da03e2a71">IOUAmount::IOUAmount</a>(<a class="code" href="classripple_1_1Number.html">Number</a> <span class="keyword">const</span>& other)</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  : mantissa_(other.mantissa()), exponent_(other.exponent())</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> {</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">if</span> (<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> > <a class="code" href="namespaceripple.html#a94ef69e98ce6b796145b0be2974cb2b6">maxExponent</a>)</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  Throw<std::overflow_error>(<span class="stringliteral">"value overflow"</span>);</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">if</span> (<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> < <a class="code" href="namespaceripple.html#a9122139b3d842cbd49c53fc2ab4f22d6">minExponent</a>)</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  *<span class="keyword">this</span> = beast::zero;</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> }</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  </div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a>&</div>
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<div class="line"><a name="l00130"></a><span class="lineno"><a class="line" href="classripple_1_1IOUAmount.html#a94bdd4a08732aed55054592776aab6f9"> 130</a></span> <a class="code" href="classripple_1_1IOUAmount.html#a94bdd4a08732aed55054592776aab6f9">IOUAmount::operator+=</a>(<a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a> <span class="keyword">const</span>& other)</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> {</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">if</span> (other == beast::zero)</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  </div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">if</span> (*<span class="keyword">this</span> == beast::zero)</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  {</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  *<span class="keyword">this</span> = other;</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  }</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  </div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceripple.html#afa1f08ba17ac61380c442f9f2fa2e7b4">getSTNumberSwitchover</a>())</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  {</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  *<span class="keyword">this</span> = <a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a>{<a class="code" href="classripple_1_1Number.html">Number</a>{*<span class="keyword">this</span>} + <a class="code" href="classripple_1_1Number.html">Number</a>{other}};</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  }</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keyword">auto</span> m = other.<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a>;</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keyword">auto</span> e = other.<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>;</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  </div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">while</span> (<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a> < e)</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  {</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> /= 10;</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  ++<a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>;</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  }</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  </div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">while</span> (e < <a class="code" href="classripple_1_1IOUAmount.html#aea9cd345c8da57dbbd2372ff434bfb23">exponent_</a>)</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  {</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  m /= 10;</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  ++e;</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  }</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  </div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="comment">// This addition cannot overflow an std::int64_t but we may throw from</span></div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="comment">// normalize if the result isn't representable.</span></div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> += m;</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  </div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordflow">if</span> (<a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> >= -10 && <a class="code" href="classripple_1_1IOUAmount.html#a44f1b32037a68e67d02237a170c5425b">mantissa_</a> <= 10)</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  {</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  *<span class="keyword">this</span> = beast::zero;</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  </div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <a class="code" href="classripple_1_1IOUAmount.html#a6eb0c4cb3891601ef809e13c1088f3fd">normalize</a>();</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> }</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  </div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div>
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<div class="line"><a name="l00176"></a><span class="lineno"><a class="line" href="namespaceripple.html#a7fdda52cfb8e7dbaed475a5fe6ce58b8"> 176</a></span> <a class="code" href="namespaceripple.html#af9776f187d3686a7fba4c2d2fbeebdf4">to_string</a>(<a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a> <span class="keyword">const</span>& amount)</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> {</div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#af9776f187d3686a7fba4c2d2fbeebdf4">to_string</a>(<a class="code" href="classripple_1_1Number.html">Number</a>{amount});</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> }</div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  </div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> IOUAmount</div>
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<div class="line"><a name="l00182"></a><span class="lineno"><a class="line" href="namespaceripple.html#aaed451aa78786841714de20f3f345f23"> 182</a></span> <a class="code" href="namespaceripple.html#aaed451aa78786841714de20f3f345f23">mulRatio</a>(</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a> <span class="keyword">const</span>& amt,</div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint32_t</a> num,</div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint32_t</a> den,</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordtype">bool</span> roundUp)</div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> {</div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keyword">using namespace </span>boost::multiprecision;</div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  </div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">if</span> (!den)</div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  Throw<std::runtime_error>(<span class="stringliteral">"division by zero"</span>);</div>
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<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  </div>
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<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="comment">// A vector with the value 10^index for indexes from 0 to 29</span></div>
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="comment">// The largest intermediate value we expect is 2^96, which</span></div>
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="comment">// is less than 10^29</span></div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keyword">static</span> <span class="keyword">auto</span> <span class="keyword">const</span> powerTable = [] {</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector<uint128_t></a> result;</div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  result.<a class="codeRef" 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>
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<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  uint128_t cur(1);</div>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 30; ++i)</div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  {</div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/push_back.html">push_back</a>(cur);</div>
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  cur *= 10;</div>
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  };</div>
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<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">return</span> result;</div>
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<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  }();</div>
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  </div>
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">// Return floor(log10(v))</span></div>
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|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="comment">// Note: Returns -1 for v == 0</span></div>
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keyword">static</span> <span class="keyword">auto</span> log10Floor = [](uint128_t <span class="keyword">const</span>& v) {</div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">// Find the index of the first element >= the requested element, the</span></div>
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="comment">// index is the log of the element in the log table.</span></div>
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<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keyword">auto</span> <span class="keyword">const</span> l =</div>
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<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/lower_bound.html">std::lower_bound</a>(powerTable.begin(), powerTable.end(), v);</div>
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<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordtype">int</span> index = <a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/distance.html">std::distance</a>(powerTable.begin(), l);</div>
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="comment">// If we're not equal, subtract to get the floor</span></div>
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">if</span> (*l != v)</div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  --index;</div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">return</span> index;</div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  };</div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  </div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">// Return ceil(log10(v))</span></div>
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|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keyword">static</span> <span class="keyword">auto</span> log10Ceil = [](uint128_t <span class="keyword">const</span>& v) {</div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="comment">// Find the index of the first element >= the requested element, the</span></div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="comment">// index is the log of the element in the log table.</span></div>
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keyword">auto</span> <span class="keyword">const</span> l =</div>
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/lower_bound.html">std::lower_bound</a>(powerTable.begin(), powerTable.end(), v);</div>
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordflow">return</span> int(<a class="codeRef" href="http://en.cppreference.com/w/cpp/iterator/distance.html">std::distance</a>(powerTable.begin(), l));</div>
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  };</div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  </div>
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keyword">static</span> <span class="keyword">auto</span> <span class="keyword">const</span> fl64 =</div>
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  log10Floor(<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/numeric_limits.html">std::numeric_limits<std::int64_t>::max</a>());</div>
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  </div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordtype">bool</span> <span class="keyword">const</span> neg = amt.<a class="code" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>() < 0;</div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  uint128_t <span class="keyword">const</span> den128(den);</div>
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="comment">// a 32 value * a 64 bit value and stored in a 128 bit value. This will</span></div>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="comment">// never overflow</span></div>
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  uint128_t <span class="keyword">const</span> mul =</div>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  uint128_t(neg ? -amt.<a class="code" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>() : amt.<a class="code" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>()) * uint128_t(num);</div>
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  </div>
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keyword">auto</span> low = mul / den128;</div>
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  uint128_t rem(mul - low * den128);</div>
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<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  </div>
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<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordtype">int</span> exponent = amt.<a class="code" href="classripple_1_1IOUAmount.html#a4123b52991469e91f146e23382f49d6c">exponent</a>();</div>
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  </div>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">if</span> (rem)</div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  {</div>
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<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="comment">// Mathematically, the result is low + rem/den128. However, since this</span></div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="comment">// uses integer division rem/den128 will be zero. Scale the result so</span></div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="comment">// low does not overflow the largest amount we can store in the mantissa</span></div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="comment">// and (rem/den128) is as large as possible. Scale by multiplying low</span></div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="comment">// and rem by 10 and subtracting one from the exponent. We could do this</span></div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="comment">// with a loop, but it's more efficient to use logarithms.</span></div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keyword">auto</span> <span class="keyword">const</span> roomToGrow = fl64 - log10Ceil(low);</div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">if</span> (roomToGrow > 0)</div>
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  {</div>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  exponent -= roomToGrow;</div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  low *= powerTable[roomToGrow];</div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  rem *= powerTable[roomToGrow];</div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keyword">auto</span> <span class="keyword">const</span> addRem = rem / den128;</div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  low += addRem;</div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  rem = rem - addRem * den128;</div>
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  }</div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  </div>
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="comment">// The largest result we can have is ~2^95, which overflows the 64 bit</span></div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="comment">// result we can store in the mantissa. Scale result down by dividing by ten</span></div>
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="comment">// and adding one to the exponent until the low will fit in the 64-bit</span></div>
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="comment">// mantissa. Use logarithms to avoid looping.</span></div>
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordtype">bool</span> hasRem = bool(rem);</div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keyword">auto</span> <span class="keyword">const</span> mustShrink = log10Ceil(low) - fl64;</div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">if</span> (mustShrink > 0)</div>
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  {</div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  uint128_t <span class="keyword">const</span> sav(low);</div>
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  exponent += mustShrink;</div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  low /= powerTable[mustShrink];</div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordflow">if</span> (!hasRem)</div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  hasRem = bool(sav - low * powerTable[mustShrink]);</div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  }</div>
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  </div>
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<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a> mantissa = low.convert_to<<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::int64_t</a>>();</div>
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<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  </div>
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<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="comment">// normalize before rounding</span></div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span> (neg)</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  mantissa *= -1;</div>
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  </div>
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a> result(mantissa, exponent);</div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  </div>
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">if</span> (hasRem)</div>
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  {</div>
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="comment">// handle rounding</span></div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">if</span> (roundUp && !neg)</div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  {</div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">if</span> (!result)</div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  {</div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">return</span> <a class="code" href="classripple_1_1IOUAmount.html#adab2635959eab5a38bd62200a538d908">IOUAmount::minPositiveAmount</a>();</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  }</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="comment">// This addition cannot overflow because the mantissa is already</span></div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="comment">// normalized</span></div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">return</span> <a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a>(result.<a class="code" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>() + 1, result.<a class="code" href="classripple_1_1IOUAmount.html#a4123b52991469e91f146e23382f49d6c">exponent</a>());</div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  }</div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  </div>
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<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">if</span> (!roundUp && neg)</div>
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<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  {</div>
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">if</span> (!result)</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  {</div>
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<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">return</span> <a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a>(-<a class="code" href="namespaceripple.html#afee293b11beff5e74fa2134b0cac6c98">minMantissa</a>, <a class="code" href="namespaceripple.html#a9122139b3d842cbd49c53fc2ab4f22d6">minExponent</a>);</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  }</div>
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<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="comment">// This subtraction cannot underflow because `result` is not zero</span></div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">return</span> <a class="code" href="classripple_1_1IOUAmount.html">IOUAmount</a>(result.<a class="code" href="classripple_1_1IOUAmount.html#a7569b6462cf1abb6018ccfbe8428bfab">mantissa</a>() - 1, result.<a class="code" href="classripple_1_1IOUAmount.html#a4123b52991469e91f146e23382f49d6c">exponent</a>());</div>
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<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  }</div>
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  }</div>
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<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  </div>
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<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">return</span> result;</div>
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<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> }</div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  </div>
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> } <span class="comment">// namespace ripple</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<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 &amt, std::uint32_t num, std::uint32_t den, bool roundUp)</div><div class="ttdef"><b>Definition:</b> <a href="IOUAmount_8cpp_source.html#l00182">IOUAmount.cpp:182</a></div></div>
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<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#l00163">IOUAmount.h:163</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a94ef69e98ce6b796145b0be2974cb2b6"><div class="ttname"><a href="namespaceripple.html#a94ef69e98ce6b796145b0be2974cb2b6">ripple::maxExponent</a></div><div class="ttdeci">static constexpr int maxExponent</div><div class="ttdef"><b>Definition:</b> <a href="IOUAmount_8cpp_source.html#l00058">IOUAmount.cpp:58</a></div></div>
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<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#l00048">IOUAmount.cpp:48</a></div></div>
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<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 class="ttdoc">STL class.</div></div>
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<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#l00061">IOUAmount.cpp:61</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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<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#l00067">IOUAmount.cpp:67</a></div></div>
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<div class="ttc" id="avector_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a></div><div class="ttdoc">STL class.</div></div>
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<div class="ttc" id="aiterator_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/iterator.html">iterator</a></div></div>
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<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>
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<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#l00043">IOUAmount.h:43</a></div></div>
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<div class="ttc" id="aalgorithm_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/algorithm.html">algorithm</a></div></div>
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<div class="ttc" id="apush_back_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/push_back.html">std::vector::push_back</a></div><div class="ttdeci">T push_back(T... args)</div></div>
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<div class="ttc" id="astdexcept_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/stdexcept.html">stdexcept</a></div></div>
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<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#l00036">Number.h:36</a></div></div>
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<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#l00047">IOUAmount.h:47</a></div></div>
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<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#l00048">IOUAmount.h:48</a></div></div>
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<div class="ttc" id="anamespaceripple_html_ab58b057b415c6cdbd520b10b674c1ef7"><div class="ttname"><a href="namespaceripple.html#ab58b057b415c6cdbd520b10b674c1ef7">ripple::maxMantissa</a></div><div class="ttdeci">static constexpr std::int64_t maxMantissa</div><div class="ttdef"><b>Definition:</b> <a href="IOUAmount_8cpp_source.html#l00055">IOUAmount.cpp:55</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a9122139b3d842cbd49c53fc2ab4f22d6"><div class="ttname"><a href="namespaceripple.html#a9122139b3d842cbd49c53fc2ab4f22d6">ripple::minExponent</a></div><div class="ttdeci">static constexpr int minExponent</div><div class="ttdef"><b>Definition:</b> <a href="IOUAmount_8cpp_source.html#l00057">IOUAmount.cpp:57</a></div></div>
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<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>
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<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="aclassripple_1_1IOUAmount_html_a94bdd4a08732aed55054592776aab6f9"><div class="ttname"><a href="classripple_1_1IOUAmount.html#a94bdd4a08732aed55054592776aab6f9">ripple::IOUAmount::operator+=</a></div><div class="ttdeci">IOUAmount & operator+=(IOUAmount const &other)</div><div class="ttdef"><b>Definition:</b> <a href="IOUAmount_8cpp_source.html#l00130">IOUAmount.cpp:130</a></div></div>
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<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="RCLCensorshipDetector_8h_source.html#l00029">RCLCensorshipDetector.h:29</a></div></div>
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<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#l00169">IOUAmount.h:169</a></div></div>
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<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>
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<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#l00042">IOUAmount.cpp:42</a></div></div>
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<div class="ttc" id="anamespaceripple_html_af9776f187d3686a7fba4c2d2fbeebdf4"><div class="ttname"><a href="namespaceripple.html#af9776f187d3686a7fba4c2d2fbeebdf4">ripple::to_string</a></div><div class="ttdeci">std::string to_string(Manifest const &m)</div><div class="ttdoc">Format the specified manifest to a string for debugging purposes.</div><div class="ttdef"><b>Definition:</b> <a href="app_2misc_2impl_2Manifest_8cpp_source.html#l00041">app/misc/impl/Manifest.cpp:41</a></div></div>
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<div class="ttc" id="anumeric_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/numeric.html">numeric</a></div></div>
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<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="anamespaceripple_html_afee293b11beff5e74fa2134b0cac6c98"><div class="ttname"><a href="namespaceripple.html#afee293b11beff5e74fa2134b0cac6c98">ripple::minMantissa</a></div><div class="ttdeci">static constexpr std::int64_t minMantissa</div><div class="ttdef"><b>Definition:</b> <a href="IOUAmount_8cpp_source.html#l00054">IOUAmount.cpp:54</a></div></div>
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