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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_1e765e6a8d5970800a535eb2615ec474.html">protocol</a></li><li class="navelem"><a class="el" href="dir_41c387a0f328eeb295307369675c1162.html">impl</a></li> </ul>
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<div class="title">tokens.cpp</div> </div>
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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> <span class="comment">//</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">/* The base58 encoding & decoding routines in the b58_ref namespace are taken</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * from Bitcoin but have been modified from the original.</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * Copyright (c) 2014 The Bitcoin Core developers</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * Distributed under the MIT software license, see the accompanying</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * file COPYING or http://www.opensource.org/licenses/mit-license.php.</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> */</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="preprocessor">#include <ripple/protocol/tokens.h></span></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="preprocessor">#include <ripple/basics/safe_cast.h></span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <ripple/protocol/digest.h></span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <ripple/protocol/impl/b58_utils.h></span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  </div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <boost/container/small_vector.hpp></span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <boost/endian.hpp></span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <boost/endian/conversion.hpp></span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/cassert.html">cassert</a>></span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/cstring.html">cstring</a>></span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/memory.html">memory</a>></span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/type_traits.html">type_traits</a>></span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/utility.html">utility</a>></span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/vector.html">vector</a>></span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">Converting between bases is straight forward. First, some background:</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">Given the coefficients C[m], ... ,C[0] and base B, those coefficients represent</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">the number C[m]*B^m + ... + C[0]*B^0; The following pseudo-code converts the</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">coefficients to the (infinite precision) integer N:</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">```</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">N = 0;</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">i = m ;; N.B. m is the index of the largest coefficient</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">while (i>=0)</span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> N = N + C[i]*B^i</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> i = i - 1</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">```</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">For example, in base 10, the number 437 represents the integer 4*10^2 + 3*10^1 +</span></div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment">7*10^0. In base 16, 437 is the same as 4*16^2 + 3*16^1 + 7*16^0.</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">To find the coefficients that represent the integer N in base B, we start by</span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment">computing the lowest order coefficients and work up to the highest order</span></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment">coefficients. The following pseudo-code converts the (infinite precision)</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">integer N to the correct coefficients:</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment">```</span></div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment">i = 0</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment">while(N)</span></div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> C[i] = N mod B</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> N = floor(N/B)</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> i = i + 1</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment">```</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">For example, to find the coefficients of the integer 437 in base 10:</span></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">C[0] is 437 mod 10; C[0] = 7;</span></div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment">N is floor(437/10); N = 43;</span></div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment">C[1] is 43 mod 10; C[1] = 3;</span></div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment">N is floor(43/10); N = 4;</span></div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment">C[2] is 4 mod 10; C[2] = 4;</span></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment">N is floor(4/10); N = 0;</span></div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment">Since N is 0, the algorithm stops.</span></div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment">To convert between a number represented with coefficients from base B1 to that</span></div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment">same number represented with coefficients from base B2, we can use the algorithm</span></div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment">that converts coefficients from base B1 to an integer, and then use the</span></div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment">algorithm that converts a number to coefficients from base B2.</span></div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment">There is a useful shortcut that can be used if one of the bases is a power of</span></div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment">the other base. If B1 == B2^G, then each coefficient from base B1 can be</span></div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment">converted to base B2 independently to create a a group of "G" B2 coefficient.</span></div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment">These coefficients can be simply concatenated together. Since 16 == 2^4, this</span></div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">property is what makes base 16 useful when dealing with binary numbers. For</span></div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">example consider converting the base 16 number "93" to binary. The base 16</span></div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">coefficient 9 is represented in base 2 with the coefficients 1,0,0,1. The base</span></div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">16 coefficient 3 is represented in base 2 with the coefficients 0,0,1,1. To get</span></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">the final answer, just concatenate those two independent conversions together.</span></div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">The base 16 number "93" is the binary number "10010011".</span></div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment">The original (now reference) algorithm to convert from base 58 to a binary</span></div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment">number used the</span></div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment">```</span></div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment">N = 0;</span></div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment">for i in m to 0 inclusive</span></div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> N = N + C[i]*B^i</span></div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment">```</span></div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment">algorithm.</span></div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment">However, the algorithm above is pseudo-code. In particular, the variable "N" is</span></div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment">an infinite precision integer in that pseudo-code. Real computers do</span></div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment">computations on registers, and these registers have limited length. Modern</span></div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment">computers use 64-bit general purpose registers, and can multiply two 64 bit</span></div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">numbers and obtain a 128 bit result (in two registers).</span></div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">The original algorithm in essence converted from base 58 to base 256 (base</span></div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment">2^8). The new, faster algorithm converts from base 58 to base 58^10 (this is</span></div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment">fast using the shortcut described above), then from base 58^10 to base 2^64</span></div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment">(this is slow, and requires multi-precision arithmetic), and then from base 2^64</span></div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment">to base 2^8 (this is fast, using the shortcut described above). Base 58^10 is</span></div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment">chosen because it is the largest power of 58 that will fit into a 64-bit</span></div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment">register.</span></div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment">While it may seem counter-intuitive that converting from base 58 -> base 58^10</span></div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment">-> base 2^64 -> base 2^8 is faster than directly converting from base 58 -> base</span></div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment">2^8, it is actually 10x-15x faster. The reason for the speed increase is two of</span></div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment">the conversions are trivial (converting between bases where one base is a power</span></div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment">of another base), and doing the multi-precision computations with larger</span></div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment">coefficients sizes greatly speeds up the multi-precision computations.</span></div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment">*/</span></div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  </div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="keyword">namespace </span><a class="code" href="namespaceripple.html">ripple</a> {</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  </div>
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<div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="namespaceripple.html#ae9be4ba34aa8246260964cc25538caee"> 138</a></span> <span class="keyword">static</span> constexpr <span class="keywordtype">char</span> <span class="keyword">const</span>* <a class="code" href="namespaceripple.html#ae9be4ba34aa8246260964cc25538caee">alphabetForward</a> =</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="stringliteral">"rpshnaf39wBUDNEGHJKLM4PQRST7VWXYZ2bcdeCg65jkm8oFqi1tuvAxyz"</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"><a class="line" href="namespaceripple.html#a0599b31ab81eb3aa2060677797802ad6"> 141</a></span> <span class="keyword">static</span> constexpr <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<int, 256></a> <span class="keyword">const</span> <a class="code" href="namespaceripple.html#a0599b31ab81eb3aa2060677797802ad6">alphabetReverse</a> = []() {</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<int, 256></a> map{};</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span>& m : map)</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  m = -1;</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0, j = 0; <a class="code" href="namespaceripple.html#ae9be4ba34aa8246260964cc25538caee">alphabetForward</a>[i] != 0; ++i)</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  map[<span class="keyword">static_cast<</span><span class="keywordtype">unsigned</span> <span class="keywordtype">char</span><span class="keyword">></span>(<a class="code" href="namespaceripple.html#ae9be4ba34aa8246260964cc25538caee">alphabetForward</a>[i])] = j++;</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">return</span> map;</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>  </div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="keyword">template</span> <<span class="keyword">class</span> Hasher></div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="keyword">static</span> <span class="keyword">typename</span> Hasher::result_type</div>
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<div class="line"><a name="l00152"></a><span class="lineno"><a class="line" href="namespaceripple.html#a91e9fe7a4e92dba79c3812fd3edcaacc"> 152</a></span> <a class="code" href="namespaceripple.html#a91e9fe7a4e92dba79c3812fd3edcaacc">digest</a>(<span class="keywordtype">void</span> <span class="keyword">const</span>* data, <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> size) noexcept</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>  Hasher h;</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  h(data, size);</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>typename Hasher::result_type<span class="keyword">></span>(h);</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> }</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  </div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="keyword">template</span> <</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keyword">class </span>Hasher,</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keyword">class </span>T,</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> N,</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">class </span>= <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/enable_if.html">std::enable_if_t</a><<span class="keyword">sizeof</span>(T) == 1>></div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="keyword">static</span> <span class="keyword">typename</span> Hasher::result_type</div>
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<div class="line"><a name="l00165"></a><span class="lineno"><a class="line" href="namespaceripple.html#aa7ab589b7476d6c8d2fc9ae8c72d38be"> 165</a></span> <a class="code" href="namespaceripple.html#a91e9fe7a4e92dba79c3812fd3edcaacc">digest</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<T, N></a> <span class="keyword">const</span>& v)</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="keywordflow">return</span> digest<Hasher>(v.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/data.html">data</a>(), v.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/size.html">size</a>());</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</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> <span class="comment">// Computes a double digest (e.g. digest of the digest)</span></div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="keyword">template</span> <<span class="keyword">class </span>Hasher, <span class="keyword">class</span>... Args></div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="keyword">static</span> <span class="keyword">typename</span> Hasher::result_type</div>
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<div class="line"><a name="l00173"></a><span class="lineno"><a class="line" href="namespaceripple.html#acd04261400a2d3beb5986da2e26ed0b4"> 173</a></span> <a class="code" href="namespaceripple.html#acd04261400a2d3beb5986da2e26ed0b4">digest2</a>(Args <span class="keyword">const</span>&... args)</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>  <span class="keywordflow">return</span> digest<Hasher>(digest<Hasher>(args...));</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> }</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="l00187"></a><span class="lineno"> 187</span> <span class="keyword">static</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00188"></a><span class="lineno"><a class="line" href="namespaceripple.html#addf2e966df148c6d810b003f9f3dc9fd"> 188</a></span> <a class="code" href="namespaceripple.html#addf2e966df148c6d810b003f9f3dc9fd">checksum</a>(<span class="keywordtype">void</span>* out, <span class="keywordtype">void</span> <span class="keyword">const</span>* message, <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> size)</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="keyword">auto</span> <span class="keyword">const</span> h = digest2<sha256_hasher>(message, size);</div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/byte/memcpy.html">std::memcpy</a>(<a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>, h.data(), 4);</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>  </div>
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> [[nodiscard]] <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="l00195"></a><span class="lineno"><a class="line" href="namespaceripple.html#a4c70c1f85ccff1b830f4bda1becb21b4"> 195</a></span> <a class="code" href="namespaceripple.html#a4c70c1f85ccff1b830f4bda1becb21b4">encodeBase58Token</a>(<a class="code" href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">TokenType</a> type, <span class="keywordtype">void</span> <span class="keyword">const</span>* token, <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> size)</div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> {</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="preprocessor">#ifndef _MSC_VER</span></div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">return</span> b58_fast::encodeBase58Token(type, token, size);</div>
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<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple_1_1b58__ref.html#aa0fa3cba7987f0ba4579070b2d4bba8d">b58_ref::encodeBase58Token</a>(type, token, size);</div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> }</div>
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  </div>
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> [[nodiscard]] <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="l00205"></a><span class="lineno"><a class="line" href="namespaceripple.html#a791e5b51e5921b1070bc195ba2959f3e"> 205</a></span> <a class="code" href="namespaceripple.html#a791e5b51e5921b1070bc195ba2959f3e">decodeBase58Token</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> <span class="keyword">const</span>& s, <a class="code" href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">TokenType</a> type)</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> <span class="preprocessor">#ifndef _MSC_VER</span></div>
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">return</span> b58_fast::decodeBase58Token(s, type);</div>
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<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple_1_1b58__ref.html#ac05a3902d978e135ba7ad0bef1e4b89e">b58_ref::decodeBase58Token</a>(s, type);</div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> }</div>
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<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  </div>
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<div class="line"><a name="l00214"></a><span class="lineno"><a class="line" href="namespaceripple_1_1b58__ref.html"> 214</a></span> <span class="keyword">namespace </span>b58_ref {</div>
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<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  </div>
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<div class="line"><a name="l00216"></a><span class="lineno"><a class="line" href="namespaceripple_1_1b58__ref_1_1detail.html"> 216</a></span> <span class="keyword">namespace </span>detail {</div>
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  </div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</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="l00219"></a><span class="lineno"><a class="line" href="namespaceripple_1_1b58__ref_1_1detail.html#ab0b27e0b4489431b8cb8f5ff8276a6ac"> 219</a></span> <a class="code" href="namespaceripple_1_1b58__ref_1_1detail.html#ab0b27e0b4489431b8cb8f5ff8276a6ac">encodeBase58</a>(</div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordtype">void</span> <span class="keyword">const</span>* message,</div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> size,</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordtype">void</span>* temp,</div>
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> temp_size)</div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> {</div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keyword">auto</span> pbegin = <span class="keyword">reinterpret_cast<</span><span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> const*<span class="keyword">></span>(message);</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> pend = pbegin + size;</div>
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  </div>
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="comment">// Skip & count leading zeroes.</span></div>
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordtype">int</span> zeroes = 0;</div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">while</span> (pbegin != pend && *pbegin == 0)</div>
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  {</div>
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  pbegin++;</div>
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  zeroes++;</div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  }</div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  </div>
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keyword">auto</span> <span class="keyword">const</span> b58begin = <span class="keyword">reinterpret_cast<</span><span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*<span class="keyword">></span>(temp);</div>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keyword">auto</span> <span class="keyword">const</span> b58end = b58begin + temp_size;</div>
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  </div>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/fill.html">std::fill</a>(b58begin, b58end, 0);</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="keywordflow">while</span> (pbegin != pend)</div>
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  {</div>
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<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordtype">int</span> carry = *pbegin;</div>
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<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="comment">// Apply "b58 = b58 * 256 + ch".</span></div>
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> iter = b58end; iter != b58begin; --iter)</div>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  {</div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  carry += 256 * (iter[-1]);</div>
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<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  iter[-1] = carry % 58;</div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  carry /= 58;</div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  }</div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  assert(carry == 0);</div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  pbegin++;</div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  }</div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  </div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="comment">// Skip leading zeroes in base58 result.</span></div>
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|
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keyword">auto</span> iter = b58begin;</div>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">while</span> (iter != b58end && *iter == 0)</div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  ++iter;</div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  </div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="comment">// Translate the result into a string.</span></div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> str;</div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  str.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/reserve.html">reserve</a>(zeroes + (b58end - iter));</div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  str.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/assign.html">assign</a>(zeroes, <a class="code" href="namespaceripple.html#ae9be4ba34aa8246260964cc25538caee">alphabetForward</a>[0]);</div>
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordflow">while</span> (iter != b58end)</div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  str += <a class="code" href="namespaceripple.html#ae9be4ba34aa8246260964cc25538caee">alphabetForward</a>[*(iter++)];</div>
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">return</span> str;</div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> }</div>
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  </div>
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</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="l00270"></a><span class="lineno"><a class="line" href="namespaceripple_1_1b58__ref_1_1detail.html#a7228a56fbbce041214ae00bd5d761107"> 270</a></span> <a class="code" href="namespaceripple_1_1b58__ref_1_1detail.html#a7228a56fbbce041214ae00bd5d761107">decodeBase58</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> <span class="keyword">const</span>& s)</div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> {</div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keyword">auto</span> psz = <span class="keyword">reinterpret_cast<</span><span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> const*<span class="keyword">></span>(s.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/c_str.html">c_str</a>());</div>
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|
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keyword">auto</span> remain = s.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>();</div>
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|
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="comment">// Skip and count leading zeroes</span></div>
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|
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordtype">int</span> zeroes = 0;</div>
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">while</span> (remain > 0 && <a class="code" href="namespaceripple.html#a0599b31ab81eb3aa2060677797802ad6">alphabetReverse</a>[*psz] == 0)</div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  {</div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  ++zeroes;</div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  ++psz;</div>
|
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  --remain;</div>
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<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  }</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="keywordflow">if</span> (remain > 64)</div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">return</span> {};</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  </div>
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="comment">// Allocate enough space in big-endian base256 representation.</span></div>
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="comment">// log(58) / log(256), rounded up.</span></div>
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector<unsigned char></a> b256(remain * 733 / 1000 + 1);</div>
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">while</span> (remain > 0)</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="keyword">auto</span> carry = <a class="code" href="namespaceripple.html#a0599b31ab81eb3aa2060677797802ad6">alphabetReverse</a>[*psz];</div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">if</span> (carry == -1)</div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">return</span> {};</div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="comment">// Apply "b256 = b256 * 58 + carry".</span></div>
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> iter = b256.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/rbegin.html">rbegin</a>(); iter != b256.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/rend.html">rend</a>(); ++iter)</div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  {</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  carry += 58 * *iter;</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  *iter = carry % 256;</div>
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  carry /= 256;</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  }</div>
|
|
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  assert(carry == 0);</div>
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<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  ++psz;</div>
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<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  --remain;</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="comment">// Skip leading zeroes in b256.</span></div>
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|
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keyword">auto</span> iter = <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/find.html">std::find_if</a>(</div>
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|
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  b256.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/begin.html">begin</a>(), b256.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>(), [](<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c) { return c != 0; });</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> result;</div>
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<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/reserve.html">reserve</a>(zeroes + (b256.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>() - iter));</div>
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<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/assign.html">assign</a>(zeroes, 0x00);</div>
|
|
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordflow">while</span> (iter != b256.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/vector/end.html">end</a>())</div>
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|
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  result.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(*(iter++));</div>
|
|
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordflow">return</span> result;</div>
|
|
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> }</div>
|
|
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  </div>
|
|
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> } <span class="comment">// namespace detail</span></div>
|
|
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  </div>
|
|
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div>
|
|
<div class="line"><a name="l00319"></a><span class="lineno"><a class="line" href="namespaceripple_1_1b58__ref.html#aa0fa3cba7987f0ba4579070b2d4bba8d"> 319</a></span> <a class="code" href="namespaceripple_1_1b58__ref.html#aa0fa3cba7987f0ba4579070b2d4bba8d">encodeBase58Token</a>(<a class="code" href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">TokenType</a> type, <span class="keywordtype">void</span> <span class="keyword">const</span>* token, <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> size)</div>
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|
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> {</div>
|
|
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="comment">// expanded token includes type + 4 byte checksum</span></div>
|
|
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keyword">auto</span> <span class="keyword">const</span> expanded = 1 + size + 4;</div>
|
|
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  </div>
|
|
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="comment">// We need expanded + expanded * (log(256) / log(58)) which is</span></div>
|
|
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="comment">// bounded by expanded + expanded * (138 / 100 + 1) which works</span></div>
|
|
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="comment">// out to expanded * 3:</span></div>
|
|
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keyword">auto</span> <span class="keyword">const</span> bufsize = expanded * 3;</div>
|
|
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  </div>
|
|
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  boost::container::small_vector<std::uint8_t, 1024> buf(bufsize);</div>
|
|
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  </div>
|
|
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="comment">// Lay the data out as</span></div>
|
|
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="comment">// <type><token><checksum></span></div>
|
|
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  buf[0] = safe_cast<std::underlying_type_t<TokenType>>(type);</div>
|
|
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="keywordflow">if</span> (size)</div>
|
|
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/byte/memcpy.html">std::memcpy</a>(buf.data() + 1, token, size);</div>
|
|
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <a class="code" href="namespaceripple.html#addf2e966df148c6d810b003f9f3dc9fd">checksum</a>(buf.data() + 1 + size, buf.data(), 1 + size);</div>
|
|
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  </div>
|
|
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple_1_1b58__ref_1_1detail.html#ab0b27e0b4489431b8cb8f5ff8276a6ac">detail::encodeBase58</a>(</div>
|
|
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  buf.data(), expanded, buf.data() + expanded, bufsize - expanded);</div>
|
|
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> }</div>
|
|
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  </div>
|
|
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div>
|
|
<div class="line"><a name="l00343"></a><span class="lineno"><a class="line" href="namespaceripple_1_1b58__ref.html#ac05a3902d978e135ba7ad0bef1e4b89e"> 343</a></span> <a class="code" href="namespaceripple_1_1b58__ref.html#ac05a3902d978e135ba7ad0bef1e4b89e">decodeBase58Token</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> <span class="keyword">const</span>& s, <a class="code" href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">TokenType</a> type)</div>
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<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> {</div>
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<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> <span class="keyword">const</span> ret = <a class="code" href="namespaceripple_1_1b58__ref_1_1detail.html#a7228a56fbbce041214ae00bd5d761107">detail::decodeBase58</a>(s);</div>
|
|
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  </div>
|
|
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="comment">// Reject zero length tokens</span></div>
|
|
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordflow">if</span> (ret.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>() < 6)</div>
|
|
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">return</span> {};</div>
|
|
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  </div>
|
|
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="comment">// The type must match.</span></div>
|
|
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keywordflow">if</span> (type != safe_cast<TokenType>(<span class="keyword">static_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a><span class="keyword">></span>(ret[0])))</div>
|
|
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">return</span> {};</div>
|
|
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  </div>
|
|
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="comment">// And the checksum must as well.</span></div>
|
|
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<char, 4></a> guard;</div>
|
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<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <a class="code" href="namespaceripple.html#addf2e966df148c6d810b003f9f3dc9fd">checksum</a>(guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/data.html">data</a>(), ret.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/data.html">data</a>(), ret.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>() - guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/size.html">size</a>());</div>
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<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">if</span> (!<a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/equal.html">std::equal</a>(guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/rbegin.html">rbegin</a>(), guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/rend.html">rend</a>(), ret.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/rbegin.html">rbegin</a>()))</div>
|
|
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keywordflow">return</span> {};</div>
|
|
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  </div>
|
|
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="comment">// Skip the leading type byte and the trailing checksum.</span></div>
|
|
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keywordflow">return</span> ret.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/substr.html">substr</a>(1, ret.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>() - 1 - guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/size.html">size</a>());</div>
|
|
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> }</div>
|
|
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> } <span class="comment">// namespace b58_ref</span></div>
|
|
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  </div>
|
|
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="preprocessor">#ifndef _MSC_VER</span></div>
|
|
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <span class="comment">// The algorithms use gcc's int128 (fast MS version will have to wait, in the</span></div>
|
|
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="comment">// meantime MS falls back to the slower reference implementation)</span></div>
|
|
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="keyword">namespace </span>b58_fast {</div>
|
|
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="keyword">namespace </span>detail {</div>
|
|
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="comment">// Note: both the input and output will be BIG ENDIAN</span></div>
|
|
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> B58Result<std::span<std::uint8_t>></div>
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|
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> b256_to_b58_be(<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t const></a> input, <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t></a> out)</div>
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<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> {</div>
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<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="comment">// Max valid input is 38 bytes:</span></div>
|
|
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="comment">// (33 bytes for nodepublic + 1 byte token + 4 bytes checksum)</span></div>
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<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordflow">if</span> (input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>() > 38)</div>
|
|
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  {</div>
|
|
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52aa5719ccaff16b46ba1b63dda0b7942bf">TokenCodecErrc::inputTooLarge</a>);</div>
|
|
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  };</div>
|
|
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  </div>
|
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<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keyword">auto</span> count_leading_zeros =</div>
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|
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  [](<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t const></a> <span class="keyword">const</span>& col) -> <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> {</div>
|
|
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/count.html">count</a> = 0;</div>
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<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> <span class="keyword">const</span>& c : col)</div>
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<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  {</div>
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<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keywordflow">if</span> (c != 0)</div>
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<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  {</div>
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|
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="keywordflow">return</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/count.html">count</a>;</div>
|
|
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  }</div>
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<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/count.html">count</a> += 1;</div>
|
|
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  }</div>
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<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="keywordflow">return</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/count.html">count</a>;</div>
|
|
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  };</div>
|
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<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  </div>
|
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<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keyword">auto</span> <span class="keyword">const</span> input_zeros = count_leading_zeros(input);</div>
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<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  input = input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/subspan.html">subspan</a>(input_zeros);</div>
|
|
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  </div>
|
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<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="comment">// Allocate enough base 2^64 coeff for encoding 38 bytes</span></div>
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<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="comment">// log(2^(38*8),2^64)) ~= 4.75. So 5 coeff are enough</span></div>
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<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<std::uint64_t, 5></a> base_2_64_coeff_buf{};</div>
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|
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint64_t></a> <span class="keyword">const</span> base_2_64_coeff =</div>
|
|
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  [&]() -> <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint64_t></a> {</div>
|
|
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="comment">// convert input from big endian to native u64, lowest coeff first</span></div>
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|
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> num_coeff = 0;</div>
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<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < base_2_64_coeff_buf.size(); ++i)</div>
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<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  {</div>
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<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">if</span> (i * 8 >= input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>())</div>
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|
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  {</div>
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<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="keywordflow">break</span>;</div>
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<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  }</div>
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<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keyword">auto</span> <span class="keyword">const</span> src_i_end = input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>() - i * 8;</div>
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<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordflow">if</span> (src_i_end >= 8)</div>
|
|
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  {</div>
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<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/byte/memcpy.html">std::memcpy</a>(</div>
|
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<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  &base_2_64_coeff_buf[num_coeff], &input[src_i_end - 8], 8);</div>
|
|
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  boost::endian::big_to_native_inplace(</div>
|
|
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  base_2_64_coeff_buf[num_coeff]);</div>
|
|
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  }</div>
|
|
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  {</div>
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<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint64_t</a> be = 0;</div>
|
|
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> bi = 0; bi < src_i_end; ++bi)</div>
|
|
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  {</div>
|
|
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  be <<= 8;</div>
|
|
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  be |= input[bi];</div>
|
|
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  }</div>
|
|
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  base_2_64_coeff_buf[num_coeff] = be;</div>
|
|
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  };</div>
|
|
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  num_coeff += 1;</div>
|
|
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  }</div>
|
|
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordflow">return</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span</a>(base_2_64_coeff_buf.data(), num_coeff);</div>
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|
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  }();</div>
|
|
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  </div>
|
|
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="comment">// Allocate enough base 58^10 coeff for encoding 38 bytes</span></div>
|
|
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <span class="comment">// log(2^(38*8),58^10)) ~= 5.18. So 6 coeff are enough</span></div>
|
|
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<std::uint64_t, 6></a> base_58_10_coeff{};</div>
|
|
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  constexpr <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint64_t</a> B_58_10 = 430804206899405824; <span class="comment">// 58^10;</span></div>
|
|
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> num_58_10_coeffs = 0;</div>
|
|
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> cur_2_64_end = base_2_64_coeff.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>();</div>
|
|
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  <span class="comment">// compute the base 58^10 coeffs</span></div>
|
|
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordflow">while</span> (cur_2_64_end > 0)</div>
|
|
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  {</div>
|
|
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  base_58_10_coeff[num_58_10_coeffs] =</div>
|
|
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  ripple::b58_fast::detail::inplace_bigint_div_rem(</div>
|
|
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  base_2_64_coeff.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/subspan.html">subspan</a>(0, cur_2_64_end), B_58_10);</div>
|
|
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  num_58_10_coeffs += 1;</div>
|
|
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="keywordflow">if</span> (base_2_64_coeff[cur_2_64_end - 1] == 0)</div>
|
|
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  {</div>
|
|
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  cur_2_64_end -= 1;</div>
|
|
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  }</div>
|
|
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  }</div>
|
|
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  </div>
|
|
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="comment">// Translate the result into the alphabet</span></div>
|
|
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="comment">// Put all the zeros at the beginning, then all the values from the output</span></div>
|
|
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/fill.html">std::fill</a>(</div>
|
|
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>.begin(), <a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>.begin() + input_zeros, ::<a class="code" href="namespaceripple.html#ae9be4ba34aa8246260964cc25538caee">ripple::alphabetForward</a>[0]);</div>
|
|
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  </div>
|
|
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="comment">// iterate through the base 58^10 coeff</span></div>
|
|
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="comment">// convert to base 58 big endian then</span></div>
|
|
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="comment">// convert to alphabet big endian</span></div>
|
|
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="keywordtype">bool</span> skip_zeros = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keyword">auto</span> out_index = input_zeros;</div>
|
|
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = num_58_10_coeffs - 1; i >= 0; --i)</div>
|
|
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  {</div>
|
|
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordflow">if</span> (skip_zeros && base_58_10_coeff[i] == 0)</div>
|
|
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  {</div>
|
|
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  }</div>
|
|
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<std::uint8_t, 10></a> <span class="keyword">const</span> b58_be =</div>
|
|
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  ripple::b58_fast::detail::b58_10_to_b58_be(base_58_10_coeff[i]);</div>
|
|
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> to_skip = 0;</div>
|
|
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t const></a> b58_be_s{b58_be.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/data.html">data</a>(), b58_be.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/size.html">size</a>()};</div>
|
|
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <span class="keywordflow">if</span> (skip_zeros)</div>
|
|
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  {</div>
|
|
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  to_skip = count_leading_zeros(b58_be_s);</div>
|
|
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  skip_zeros = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>.size() < (i + 1) * 10 - to_skip)</div>
|
|
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  {</div>
|
|
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52afad9310fafa56ee8ea813d9c6843d06d">TokenCodecErrc::outputTooSmall</a>);</div>
|
|
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  }</div>
|
|
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  }</div>
|
|
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> b58_coeff : b58_be_s.subspan(to_skip))</div>
|
|
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  {</div>
|
|
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>[out_index] = ::ripple::alphabetForward[b58_coeff];</div>
|
|
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  out_index += 1;</div>
|
|
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  }</div>
|
|
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  }</div>
|
|
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  </div>
|
|
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>.subspan(0, out_index);</div>
|
|
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> }</div>
|
|
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  </div>
|
|
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="comment">// Note the input is BIG ENDIAN (some fn in this module use little endian)</span></div>
|
|
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> B58Result<std::span<std::uint8_t>></div>
|
|
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> b58_to_b256_be(<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string_view.html">std::string_view</a> input, <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t></a> out)</div>
|
|
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span> {</div>
|
|
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  <span class="comment">// Convert from b58 to b 58^10</span></div>
|
|
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  </div>
|
|
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="comment">// Max encoded value is 38 bytes</span></div>
|
|
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="comment">// log(2^(38*8),58) ~= 51.9</span></div>
|
|
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">if</span> (input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string_view/size.html">size</a>() > 52)</div>
|
|
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  {</div>
|
|
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52aa5719ccaff16b46ba1b63dda0b7942bf">TokenCodecErrc::inputTooLarge</a>);</div>
|
|
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  };</div>
|
|
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <span class="keywordflow">if</span> (<a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>.size() < 8)</div>
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|
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  {</div>
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|
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52afad9310fafa56ee8ea813d9c6843d06d">TokenCodecErrc::outputTooSmall</a>);</div>
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|
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  }</div>
|
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<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  </div>
|
|
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="keyword">auto</span> count_leading_zeros = [&](<span class="keyword">auto</span> <span class="keyword">const</span>& col) -> <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> {</div>
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<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/count.html">count</a> = 0;</div>
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|
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> <span class="keyword">const</span>& c : col)</div>
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<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  {</div>
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<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  <span class="keywordflow">if</span> (c != ::<a class="code" href="namespaceripple.html#ae9be4ba34aa8246260964cc25538caee">ripple::alphabetForward</a>[0])</div>
|
|
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  {</div>
|
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<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  <span class="keywordflow">return</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/count.html">count</a>;</div>
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<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  }</div>
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<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/count.html">count</a> += 1;</div>
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<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  }</div>
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<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <span class="keywordflow">return</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/count.html">count</a>;</div>
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<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  };</div>
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<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  </div>
|
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<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keyword">auto</span> <span class="keyword">const</span> input_zeros = count_leading_zeros(input);</div>
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<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  </div>
|
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<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <span class="comment">// Allocate enough base 58^10 coeff for encoding 38 bytes</span></div>
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<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="comment">// (33 bytes for nodepublic + 1 byte token + 4 bytes checksum)</span></div>
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<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="comment">// log(2^(38*8),58^10)) ~= 5.18. So 6 coeff are enough</span></div>
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<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<std::uint64_t, 6></a> b_58_10_coeff{};</div>
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<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <span class="keyword">auto</span> [num_full_coeffs, partial_coeff_len] =</div>
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<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  ripple::b58_fast::detail::div_rem(input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string_view/size.html">size</a>(), 10);</div>
|
|
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="keyword">auto</span> <span class="keyword">const</span> num_partial_coeffs = partial_coeff_len ? 1 : 0;</div>
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|
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  <span class="keyword">auto</span> <span class="keyword">const</span> num_b_58_10_coeffs = num_full_coeffs + num_partial_coeffs;</div>
|
|
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  assert(num_b_58_10_coeffs <= b_58_10_coeff.size());</div>
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|
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> c : input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string_view/substr.html">substr</a>(0, partial_coeff_len))</div>
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|
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  {</div>
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|
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  <span class="keyword">auto</span> cur_val = ::ripple::alphabetReverse[c];</div>
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|
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">if</span> (cur_val < 0)</div>
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|
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  {</div>
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|
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a964b28063f3be0e030ba9956b42c1021">TokenCodecErrc::invalidEncodingChar</a>);</div>
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|
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  }</div>
|
|
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  b_58_10_coeff[0] *= 58;</div>
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<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  b_58_10_coeff[0] += cur_val;</div>
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<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  }</div>
|
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<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 10; ++i)</div>
|
|
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  {</div>
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|
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < num_full_coeffs; ++j)</div>
|
|
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  {</div>
|
|
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <span class="keyword">auto</span> c = input[partial_coeff_len + j * 10 + i];</div>
|
|
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keyword">auto</span> cur_val = ::ripple::alphabetReverse[c];</div>
|
|
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="keywordflow">if</span> (cur_val < 0)</div>
|
|
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  {</div>
|
|
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a964b28063f3be0e030ba9956b42c1021">TokenCodecErrc::invalidEncodingChar</a>);</div>
|
|
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  }</div>
|
|
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  b_58_10_coeff[num_partial_coeffs + j] *= 58;</div>
|
|
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  b_58_10_coeff[num_partial_coeffs + j] += cur_val;</div>
|
|
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  }</div>
|
|
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  }</div>
|
|
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  </div>
|
|
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  constexpr <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint64_t</a> B_58_10 = 430804206899405824; <span class="comment">// 58^10;</span></div>
|
|
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  </div>
|
|
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  <span class="comment">// log(2^(38*8),2^64) ~= 4.75)</span></div>
|
|
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<std::uint64_t, 5></a> result{};</div>
|
|
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  result[0] = b_58_10_coeff[0];</div>
|
|
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> cur_result_size = 1;</div>
|
|
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < num_b_58_10_coeffs; ++i)</div>
|
|
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  {</div>
|
|
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint64_t</a> <span class="keyword">const</span> c = b_58_10_coeff[i];</div>
|
|
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  ripple::b58_fast::detail::inplace_bigint_mul(</div>
|
|
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span</a>(&result[0], cur_result_size + 1), B_58_10);</div>
|
|
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  ripple::b58_fast::detail::inplace_bigint_add(</div>
|
|
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span</a>(&result[0], cur_result_size + 1), c);</div>
|
|
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  <span class="keywordflow">if</span> (result[cur_result_size] != 0)</div>
|
|
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  {</div>
|
|
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  cur_result_size += 1;</div>
|
|
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  }</div>
|
|
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  }</div>
|
|
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/fill.html">std::fill</a>(<a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>.begin(), <a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>.begin() + input_zeros, 0);</div>
|
|
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="keyword">auto</span> cur_out_i = input_zeros;</div>
|
|
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="comment">// Don't write leading zeros to the output for the most significant</span></div>
|
|
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="comment">// coeff</span></div>
|
|
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  {</div>
|
|
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint64_t</a> <span class="keyword">const</span> c = result[cur_result_size - 1];</div>
|
|
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  <span class="keyword">auto</span> skip_zero = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="comment">// start and end of output range</span></div>
|
|
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 8; ++i)</div>
|
|
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  {</div>
|
|
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a> <span class="keyword">const</span> b = (c >> (8 * (7 - i))) & 0xff;</div>
|
|
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keywordflow">if</span> (skip_zero)</div>
|
|
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  {</div>
|
|
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="keywordflow">if</span> (b == 0)</div>
|
|
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  {</div>
|
|
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  }</div>
|
|
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  skip_zero = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  }</div>
|
|
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  <a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>[cur_out_i] = b;</div>
|
|
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  cur_out_i += 1;</div>
|
|
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  }</div>
|
|
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  }</div>
|
|
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <span class="keywordflow">if</span> ((cur_out_i + 8 * (cur_result_size - 1)) > <a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>.size())</div>
|
|
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  {</div>
|
|
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52afad9310fafa56ee8ea813d9c6843d06d">TokenCodecErrc::outputTooSmall</a>);</div>
|
|
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  }</div>
|
|
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  </div>
|
|
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = cur_result_size - 2; i >= 0; --i)</div>
|
|
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  {</div>
|
|
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <span class="keyword">auto</span> c = result[i];</div>
|
|
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  boost::endian::native_to_big_inplace(c);</div>
|
|
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/byte/memcpy.html">memcpy</a>(&out[cur_out_i], &c, 8);</div>
|
|
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  cur_out_i += 8;</div>
|
|
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  }</div>
|
|
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  </div>
|
|
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">out</a>.subspan(0, cur_out_i);</div>
|
|
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span> }</div>
|
|
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span> } <span class="comment">// namespace detail</span></div>
|
|
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  </div>
|
|
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span> B58Result<std::span<std::uint8_t>></div>
|
|
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span> <a class="code" href="namespaceripple.html#a4c70c1f85ccff1b830f4bda1becb21b4">encodeBase58Token</a>(</div>
|
|
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  <a class="code" href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">TokenType</a> token_type,</div>
|
|
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t const></a> input,</div>
|
|
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t></a> out)</div>
|
|
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span> {</div>
|
|
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  constexpr <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> tmpBufSize = 128;</div>
|
|
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<std::uint8_t, tmpBufSize></a> buf;</div>
|
|
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <span class="keywordflow">if</span> (input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>() > tmpBufSize - 5)</div>
|
|
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  {</div>
|
|
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52aa5719ccaff16b46ba1b63dda0b7942bf">TokenCodecErrc::inputTooLarge</a>);</div>
|
|
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  }</div>
|
|
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <span class="keywordflow">if</span> (input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>() == 0)</div>
|
|
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  {</div>
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|
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a06076b4762a26c620172d402ba86c658">TokenCodecErrc::inputTooSmall</a>);</div>
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|
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  }</div>
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|
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  <span class="comment">// <type (1 byte)><token (input len)><checksum (4 bytes)></span></div>
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|
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  buf[0] = <span class="keyword">static_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a><span class="keyword">></span>(token_type);</div>
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|
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <span class="comment">// buf[1..=input.len()] = input;</span></div>
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|
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/byte/memcpy.html">memcpy</a>(&buf[1], input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/data.html">data</a>(), input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>());</div>
|
|
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  <span class="keywordtype">size_t</span> <span class="keyword">const</span> checksum_i = input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>() + 1;</div>
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|
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="comment">// buf[checksum_i..checksum_i + 4] = checksum</span></div>
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|
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <a class="code" href="namespaceripple.html#addf2e966df148c6d810b003f9f3dc9fd">checksum</a>(buf.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/data.html">data</a>() + checksum_i, buf.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/data.html">data</a>(), checksum_i);</div>
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|
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t const></a> b58Span(buf.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/data.html">data</a>(), input.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>() + 5);</div>
|
|
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  <span class="keywordflow">return</span> detail::b256_to_b58_be(b58Span, out);</div>
|
|
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span> }</div>
|
|
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span> <span class="comment">// Convert from base 58 to base 256, largest coefficients first</span></div>
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|
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span> <span class="comment">// The input is encoded in XPRL format, with the token in the first</span></div>
|
|
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span> <span class="comment">// byte and the checksum in the last four bytes.</span></div>
|
|
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span> <span class="comment">// The decoded base 256 value does not include the token type or checksum.</span></div>
|
|
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span> <span class="comment">// It is an error if the token type or checksum does not match.</span></div>
|
|
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span> B58Result<std::span<std::uint8_t>></div>
|
|
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span> <a class="code" href="namespaceripple.html#a791e5b51e5921b1070bc195ba2959f3e">decodeBase58Token</a>(</div>
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|
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <a class="code" href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">TokenType</a> type,</div>
|
|
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string_view.html">std::string_view</a> s,</div>
|
|
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t></a> outBuf)</div>
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|
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span> {</div>
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|
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<std::uint8_t, 64></a> tmpBuf;</div>
|
|
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  <span class="keyword">auto</span> <span class="keyword">const</span> decodeResult =</div>
|
|
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  detail::b58_to_b256_be(s, <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span</a>(tmpBuf.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/data.html">data</a>(), tmpBuf.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/size.html">size</a>()));</div>
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|
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  </div>
|
|
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  <span class="keywordflow">if</span> (!decodeResult)</div>
|
|
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  <span class="keywordflow">return</span> decodeResult;</div>
|
|
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  </div>
|
|
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  <span class="keyword">auto</span> <span class="keyword">const</span> ret = decodeResult.value();</div>
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|
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  </div>
|
|
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <span class="comment">// Reject zero length tokens</span></div>
|
|
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  <span class="keywordflow">if</span> (ret.size() < 6)</div>
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|
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a06076b4762a26c620172d402ba86c658">TokenCodecErrc::inputTooSmall</a>);</div>
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|
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  </div>
|
|
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <span class="comment">// The type must match.</span></div>
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|
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  <span class="keywordflow">if</span> (type != <span class="keyword">static_cast<</span><a class="code" href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">TokenType</a><span class="keyword">></span>(<span class="keyword">static_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a><span class="keyword">></span>(ret[0])))</div>
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<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a0f7e5e9e573802e649fb00c509b75cdc">TokenCodecErrc::mismatchedTokenType</a>);</div>
|
|
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  </div>
|
|
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  <span class="comment">// And the checksum must as well.</span></div>
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|
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<std::uint8_t, 4></a> guard;</div>
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|
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <a class="code" href="namespaceripple.html#addf2e966df148c6d810b003f9f3dc9fd">checksum</a>(guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/data.html">data</a>(), ret.data(), ret.size() - guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/size.html">size</a>());</div>
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<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  <span class="keywordflow">if</span> (!<a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/equal.html">std::equal</a>(guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/rbegin.html">rbegin</a>(), guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/rend.html">rend</a>(), ret.rbegin()))</div>
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|
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  {</div>
|
|
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a14a15fcb1489e8bbf73564a4eaddf6b8">TokenCodecErrc::mismatchedChecksum</a>);</div>
|
|
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  }</div>
|
|
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  </div>
|
|
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> <span class="keyword">const</span> outSize = ret.size() - 1 - guard.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/array/size.html">size</a>();</div>
|
|
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="keywordflow">if</span> (outBuf.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/size.html">size</a>() < outSize)</div>
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|
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">Unexpected</a>(<a class="code" href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52afad9310fafa56ee8ea813d9c6843d06d">TokenCodecErrc::outputTooSmall</a>);</div>
|
|
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  <span class="comment">// Skip the leading type byte and the trailing checksum.</span></div>
|
|
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/copy.html">std::copy</a>(ret.begin() + 1, ret.begin() + outSize + 1, outBuf.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/begin.html">begin</a>());</div>
|
|
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  <span class="keywordflow">return</span> outBuf.<a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span/subspan.html">subspan</a>(0, outSize);</div>
|
|
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span> }</div>
|
|
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  </div>
|
|
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span> [[nodiscard]] <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div>
|
|
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span> <a class="code" href="namespaceripple.html#a4c70c1f85ccff1b830f4bda1becb21b4">encodeBase58Token</a>(<a class="code" href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">TokenType</a> type, <span class="keywordtype">void</span> <span class="keyword">const</span>* token, <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> size)</div>
|
|
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span> {</div>
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|
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> sr;</div>
|
|
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  <span class="comment">// The largest object encoded as base58 is 33 bytes; This will be encoded in</span></div>
|
|
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  <span class="comment">// at most ceil(log(2^256,58)) bytes, or 46 bytes. 128 is plenty (and</span></div>
|
|
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <span class="comment">// there's not real benefit making it smaller). Note that 46 bytes may be</span></div>
|
|
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  <span class="comment">// encoded in more than 46 base58 chars. Since decode uses 64 as the</span></div>
|
|
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  <span class="comment">// over-allocation, this function uses 128 (again, over-allocation assuming</span></div>
|
|
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <span class="comment">// 2 base 58 char per byte)</span></div>
|
|
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  sr.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/resize.html">resize</a>(128);</div>
|
|
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t></a> outSp(</div>
|
|
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <span class="keyword">reinterpret_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a>*<span class="keyword">></span>(sr.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/data.html">data</a>()), sr.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>());</div>
|
|
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t const></a> inSp(</div>
|
|
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  <span class="keyword">reinterpret_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a> const*<span class="keyword">></span>(token), size);</div>
|
|
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  <span class="keyword">auto</span> r = b58_fast::encodeBase58Token(type, inSp, outSp);</div>
|
|
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  <span class="keywordflow">if</span> (!r)</div>
|
|
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  <span class="keywordflow">return</span> {};</div>
|
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<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  sr.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/resize.html">resize</a>(r.value().size());</div>
|
|
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  <span class="keywordflow">return</span> sr;</div>
|
|
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span> }</div>
|
|
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  </div>
|
|
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span> [[nodiscard]] <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div>
|
|
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span> <a class="code" href="namespaceripple.html#a791e5b51e5921b1070bc195ba2959f3e">decodeBase58Token</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> <span class="keyword">const</span>& s, <a class="code" href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">TokenType</a> type)</div>
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|
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span> {</div>
|
|
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> sr;</div>
|
|
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  <span class="comment">// The largest object encoded as base58 is 33 bytes; 64 is plenty (and</span></div>
|
|
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  <span class="comment">// there's no benefit making it smaller)</span></div>
|
|
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  sr.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/resize.html">resize</a>(64);</div>
|
|
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/container/span.html">std::span<std::uint8_t></a> outSp(</div>
|
|
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  <span class="keyword">reinterpret_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a>*<span class="keyword">></span>(sr.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/data.html">data</a>()), sr.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>());</div>
|
|
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  <span class="keyword">auto</span> r = b58_fast::decodeBase58Token(type, s, outSp);</div>
|
|
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  <span class="keywordflow">if</span> (!r)</div>
|
|
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="keywordflow">return</span> {};</div>
|
|
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  sr.<a class="codeRef" href="http://en.cppreference.com/w/cpp/string/basic_string/resize.html">resize</a>(r.value().size());</div>
|
|
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  <span class="keywordflow">return</span> sr;</div>
|
|
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span> }</div>
|
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<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  </div>
|
|
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span> } <span class="comment">// namespace b58_fast</span></div>
|
|
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span> <span class="preprocessor">#endif // _MSC_VER</span></div>
|
|
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span> } <span class="comment">// namespace ripple</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="asubspan_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/span/subspan.html">std::span::subspan</a></div><div class="ttdeci">T subspan(T... args)</div></div>
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<div class="ttc" id="aresize_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/resize.html">std::string::resize</a></div><div class="ttdeci">T resize(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_a8f71b86b6529e14eaa595d90bc74ae52a14a15fcb1489e8bbf73564a4eaddf6b8"><div class="ttname"><a href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a14a15fcb1489e8bbf73564a4eaddf6b8">ripple::TokenCodecErrc::mismatchedChecksum</a></div><div class="ttdeci">@ mismatchedChecksum</div></div>
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<div class="ttc" id="aspan_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/span.html">std::span</a></div><div class="ttdoc">STL class.</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="aequal_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/equal.html">std::equal</a></div><div class="ttdeci">T equal(T... args)</div></div>
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<div class="ttc" id="autility_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/utility.html">utility</a></div></div>
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<div class="ttc" id="acstring_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/cstring.html">cstring</a></div></div>
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<div class="ttc" id="abasic_string_view_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string_view.html">std::string_view</a></div><div class="ttdoc">STL class.</div></div>
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<div class="ttc" id="anamespaceripple_html_ae9be4ba34aa8246260964cc25538caee"><div class="ttname"><a href="namespaceripple.html#ae9be4ba34aa8246260964cc25538caee">ripple::alphabetForward</a></div><div class="ttdeci">static constexpr char const * alphabetForward</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00138">tokens.cpp:138</a></div></div>
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<div class="ttc" id="areserve_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/reserve.html">std::string::reserve</a></div><div class="ttdeci">T reserve(T... args)</div></div>
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<div class="ttc" id="avector_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/vector.html">vector</a></div></div>
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<div class="ttc" id="afind_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/find.html">std::find_if</a></div><div class="ttdeci">T find_if(T... args)</div></div>
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<div class="ttc" id="asize_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/array/size.html">std::array::size</a></div><div class="ttdeci">T size(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_ad6887fe0534dd3b0df2da54ff8994e2f"><div class="ttname"><a href="namespaceripple.html#ad6887fe0534dd3b0df2da54ff8994e2f">ripple::Unexpected</a></div><div class="ttdeci">Unexpected(E(&)[N]) -> Unexpected< E const * ></div></div>
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<div class="ttc" id="anamespaceripple_html_addf2e966df148c6d810b003f9f3dc9fd"><div class="ttname"><a href="namespaceripple.html#addf2e966df148c6d810b003f9f3dc9fd">ripple::checksum</a></div><div class="ttdeci">static void checksum(void *out, void const *message, std::size_t size)</div><div class="ttdoc">Calculate a 4-byte checksum of the data.</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00188">tokens.cpp:188</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a8f71b86b6529e14eaa595d90bc74ae52afad9310fafa56ee8ea813d9c6843d06d"><div class="ttname"><a href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52afad9310fafa56ee8ea813d9c6843d06d">ripple::TokenCodecErrc::outputTooSmall</a></div><div class="ttdeci">@ outputTooSmall</div></div>
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<div class="ttc" id="anamespaceripple_html_a791e5b51e5921b1070bc195ba2959f3e"><div class="ttname"><a href="namespaceripple.html#a791e5b51e5921b1070bc195ba2959f3e">ripple::decodeBase58Token</a></div><div class="ttdeci">std::string decodeBase58Token(std::string const &s, TokenType type)</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00205">tokens.cpp:205</a></div></div>
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<div class="ttc" id="anamespaceripple_1_1b58__ref_html_ac05a3902d978e135ba7ad0bef1e4b89e"><div class="ttname"><a href="namespaceripple_1_1b58__ref.html#ac05a3902d978e135ba7ad0bef1e4b89e">ripple::b58_ref::decodeBase58Token</a></div><div class="ttdeci">std::string decodeBase58Token(std::string const &s, TokenType type)</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00343">tokens.cpp:343</a></div></div>
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<div class="ttc" id="anamespaceripple_1_1b58__ref_html_aa0fa3cba7987f0ba4579070b2d4bba8d"><div class="ttname"><a href="namespaceripple_1_1b58__ref.html#aa0fa3cba7987f0ba4579070b2d4bba8d">ripple::b58_ref::encodeBase58Token</a></div><div class="ttdeci">std::string encodeBase58Token(TokenType type, void const *token, std::size_t size)</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00319">tokens.cpp:319</a></div></div>
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<div class="ttc" id="afill_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/fill.html">std::fill</a></div><div class="ttdeci">T fill(T... args)</div></div>
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<div class="ttc" id="apush_back_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">std::string::push_back</a></div><div class="ttdeci">T push_back(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_a91e9fe7a4e92dba79c3812fd3edcaacc"><div class="ttname"><a href="namespaceripple.html#a91e9fe7a4e92dba79c3812fd3edcaacc">ripple::digest</a></div><div class="ttdeci">static Hasher::result_type digest(void const *data, std::size_t size) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00152">tokens.cpp:152</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275"><div class="ttname"><a href="namespaceripple.html#a7cc64e12723fbc9606d85442a2569fedac68271a63ddbc431c307beb7d2918275">ripple::QualityDirection::out</a></div><div class="ttdeci">@ out</div></div>
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<div class="ttc" id="anamespaceripple_html_a1bf8df553d36589191c8057c136cce03"><div class="ttname"><a href="namespaceripple.html#a1bf8df553d36589191c8057c136cce03">ripple::TokenType</a></div><div class="ttdeci">TokenType</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8h_source.html#l00038">tokens.h:38</a></div></div>
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<div class="ttc" id="aenable_if_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/enable_if.html">std::enable_if_t</a></div></div>
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<div class="ttc" id="ac_str_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/c_str.html">std::string::c_str</a></div><div class="ttdeci">T c_str(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_a8f71b86b6529e14eaa595d90bc74ae52a0f7e5e9e573802e649fb00c509b75cdc"><div class="ttname"><a href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a0f7e5e9e573802e649fb00c509b75cdc">ripple::TokenCodecErrc::mismatchedTokenType</a></div><div class="ttdeci">@ mismatchedTokenType</div></div>
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<div class="ttc" id="aarray_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/array.html">std::array</a></div><div class="ttdoc">STL class.</div></div>
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<div class="ttc" id="acopy_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/copy.html">std::copy</a></div><div class="ttdeci">T copy(T... args)</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::uint8_t</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a8f71b86b6529e14eaa595d90bc74ae52aa5719ccaff16b46ba1b63dda0b7942bf"><div class="ttname"><a href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52aa5719ccaff16b46ba1b63dda0b7942bf">ripple::TokenCodecErrc::inputTooLarge</a></div><div class="ttdeci">@ inputTooLarge</div></div>
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<div class="ttc" id="anamespaceripple_1_1b58__ref_1_1detail_html_a7228a56fbbce041214ae00bd5d761107"><div class="ttname"><a href="namespaceripple_1_1b58__ref_1_1detail.html#a7228a56fbbce041214ae00bd5d761107">ripple::b58_ref::detail::decodeBase58</a></div><div class="ttdeci">std::string decodeBase58(std::string const &s)</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00270">tokens.cpp:270</a></div></div>
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<div class="ttc" id="amemory_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/memory.html">memory</a></div></div>
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<div class="ttc" id="arend_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/rend.html">std::vector::rend</a></div><div class="ttdeci">T rend(T... args)</div></div>
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<div class="ttc" id="asubstr_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/substr.html">std::string::substr</a></div><div class="ttdeci">T substr(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_acd04261400a2d3beb5986da2e26ed0b4"><div class="ttname"><a href="namespaceripple.html#acd04261400a2d3beb5986da2e26ed0b4">ripple::digest2</a></div><div class="ttdeci">static Hasher::result_type digest2(Args const &... args)</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00173">tokens.cpp:173</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="anamespaceripple_1_1b58__ref_1_1detail_html_ab0b27e0b4489431b8cb8f5ff8276a6ac"><div class="ttname"><a href="namespaceripple_1_1b58__ref_1_1detail.html#ab0b27e0b4489431b8cb8f5ff8276a6ac">ripple::b58_ref::detail::encodeBase58</a></div><div class="ttdeci">std::string encodeBase58(void const *message, std::size_t size, void *temp, std::size_t temp_size)</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00219">tokens.cpp:219</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a4c70c1f85ccff1b830f4bda1becb21b4"><div class="ttname"><a href="namespaceripple.html#a4c70c1f85ccff1b830f4bda1becb21b4">ripple::encodeBase58Token</a></div><div class="ttdeci">std::string encodeBase58Token(TokenType type, void const *token, std::size_t size)</div><div class="ttdoc">Encode data in Base58Check format using XRPL alphabet.</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00195">tokens.cpp:195</a></div></div>
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<div class="ttc" id="abegin_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/begin.html">std::vector::begin</a></div><div class="ttdeci">T begin(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_a8f71b86b6529e14eaa595d90bc74ae52a06076b4762a26c620172d402ba86c658"><div class="ttname"><a href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a06076b4762a26c620172d402ba86c658">ripple::TokenCodecErrc::inputTooSmall</a></div><div class="ttdeci">@ inputTooSmall</div></div>
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<div class="ttc" id="acassert_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/cassert.html">cassert</a></div></div>
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<div class="ttc" id="acount_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/count.html">std::count</a></div><div class="ttdeci">T count(T... args)</div></div>
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<div class="ttc" id="aassign_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/assign.html">std::string::assign</a></div><div class="ttdeci">T assign(T... args)</div></div>
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<div class="ttc" id="asize_t_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a></div></div>
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<div class="ttc" id="amemcpy_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/byte/memcpy.html">std::memcpy</a></div><div class="ttdeci">T memcpy(T... args)</div></div>
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<div class="ttc" id="aend_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/end.html">std::vector::end</a></div><div class="ttdeci">T end(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_a8f71b86b6529e14eaa595d90bc74ae52a964b28063f3be0e030ba9956b42c1021"><div class="ttname"><a href="namespaceripple.html#a8f71b86b6529e14eaa595d90bc74ae52a964b28063f3be0e030ba9956b42c1021">ripple::TokenCodecErrc::invalidEncodingChar</a></div><div class="ttdeci">@ invalidEncodingChar</div></div>
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<div class="ttc" id="adata_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/array/data.html">std::array::data</a></div><div class="ttdeci">T data(T... args)</div></div>
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<div class="ttc" id="atype_traits_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/type_traits.html">type_traits</a></div></div>
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<div class="ttc" id="arbegin_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector/rbegin.html">std::vector::rbegin</a></div><div class="ttdeci">T rbegin(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html_a0599b31ab81eb3aa2060677797802ad6"><div class="ttname"><a href="namespaceripple.html#a0599b31ab81eb3aa2060677797802ad6">ripple::alphabetReverse</a></div><div class="ttdeci">static constexpr const std::array< int, 256 > alphabetReverse</div><div class="ttdef"><b>Definition:</b> <a href="tokens_8cpp_source.html#l00141">tokens.cpp:141</a></div></div>
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