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<li class="navelem"><a class="el" href="dir_bc0718b08fb2015b8e59c47b2805f60c.html">libraries</a></li><li class="navelem"><a class="el" href="dir_e2ce51835550ba18edf07a8311722290.html">Crypto</a></li> </ul>
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<div class="title">BigNumberUtil.cpp</div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (C) 2015 Southern Storm Software, Pty Ltd.</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * copy of this software and associated documentation files (the "Software"),</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * to deal in the Software without restriction, including without limitation</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * the rights to use, copy, modify, merge, publish, distribute, sublicense,</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * and/or sell copies of the Software, and to permit persons to whom the</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * Software is furnished to do so, subject to the following conditions:</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * The above copyright notice and this permission notice shall be included</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * in all copies or substantial portions of the Software.</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * DEALINGS IN THE SOFTWARE.</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "BigNumberUtil.h"</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "utility/EndianUtil.h"</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "utility/LimbUtil.h"</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <string.h></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="l00055"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#a25041f898c417c8dd63f30536287ed79"> 55</a></span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a25041f898c417c8dd63f30536287ed79">BigNumberUtil::unpackLE</a>(limb_t *limbs, <span class="keywordtype">size_t</span> count,</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">const</span> uint8_t *bytes, <span class="keywordtype">size_t</span> len)</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> {</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor">#if BIGNUMBER_LIMB_8BIT</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor"></span> <span class="keywordflow">if</span> (len < count) {</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  memcpy(limbs, bytes, len);</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  memset(limbs + len, 0, count - len);</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  memcpy(limbs, bytes, count);</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor">#elif CRYPTO_LITTLE_ENDIAN</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor"></span> count *= <span class="keyword">sizeof</span>(limb_t);</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">if</span> (len < count) {</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  memcpy(limbs, bytes, len);</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  memset(((uint8_t *)limbs) + len, 0, count - len);</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  memcpy(limbs, bytes, count);</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_16BIT</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor"></span> <span class="keywordflow">while</span> (count > 0 && len >= 2) {</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  *limbs++ = ((limb_t)(bytes[0])) |</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  (((limb_t)(bytes[1])) << 8);</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  bytes += 2;</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  --count;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  len -= 2;</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">if</span> (count > 0 && len == 1) {</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  *limbs++ = ((limb_t)(bytes[0]));</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  --count;</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  }</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">while</span> (count > 0) {</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  *limbs++ = 0;</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  --count;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_32BIT</span></div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor"></span> <span class="keywordflow">while</span> (count > 0 && len >= 4) {</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  *limbs++ = ((limb_t)(bytes[0])) |</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  (((limb_t)(bytes[1])) << 8) |</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  (((limb_t)(bytes[2])) << 16) |</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  (((limb_t)(bytes[3])) << 24);</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  bytes += 4;</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  --count;</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  len -= 4;</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">if</span> (count > 0 && len > 0) {</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (len == 3) {</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  *limbs++ = ((limb_t)(bytes[0])) |</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  (((limb_t)(bytes[1])) << 8) |</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  (((limb_t)(bytes[2])) << 16);</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (len == 2) {</div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  *limbs++ = ((limb_t)(bytes[0])) |</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  (((limb_t)(bytes[1])) << 8);</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  *limbs++ = ((limb_t)(bytes[0]));</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  }</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  --count;</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">while</span> (count > 0) {</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  *limbs++ = 0;</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  --count;</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  }</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_64BIT</span></div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="preprocessor"></span> <span class="keywordflow">while</span> (count > 0 && len >= 8) {</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  *limbs++ = ((limb_t)(bytes[0])) |</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  (((limb_t)(bytes[1])) << 8) |</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  (((limb_t)(bytes[2])) << 16) |</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  (((limb_t)(bytes[3])) << 24) |</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  (((limb_t)(bytes[4])) << 32) |</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  (((limb_t)(bytes[5])) << 40) |</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  (((limb_t)(bytes[6])) << 48) |</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  (((limb_t)(bytes[7])) << 56);</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  bytes += 8;</div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  --count;</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  len -= 8;</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  }</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">if</span> (count > 0 && len > 0) {</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  limb_t word = 0;</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  uint8_t shift = 0;</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">while</span> (len > 0 && shift < 64) {</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  word |= (((limb_t)(*bytes++)) << shift);</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  shift += 8;</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  --len;</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"> 138</span>  *limbs++ = word;</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  --count;</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  }</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">while</span> (count > 0) {</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  *limbs++ = 0;</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  --count;</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  }</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="preprocessor"></span>}</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div>
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<div class="line"><a name="l00163"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#a63f9d7884eb36227d39e1b95e219d865"> 163</a></span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a63f9d7884eb36227d39e1b95e219d865">BigNumberUtil::unpackBE</a>(limb_t *limbs, <span class="keywordtype">size_t</span> count,</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keyword">const</span> uint8_t *bytes, <span class="keywordtype">size_t</span> len)</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> {</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="preprocessor">#if BIGNUMBER_LIMB_8BIT</span></div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="preprocessor"></span> <span class="keywordflow">while</span> (count > 0 && len > 0) {</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  --count;</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  --len;</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  *limbs++ = bytes[len];</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  memset(limbs, 0, count);</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_16BIT</span></div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="preprocessor"></span> bytes += len;</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">while</span> (count > 0 && len >= 2) {</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  --count;</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  bytes -= 2;</div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  len -= 2;</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  *limbs++ = ((limb_t)(bytes[1])) |</div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  (((limb_t)(bytes[0])) << 8);</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  }</div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">if</span> (count > 0 && len == 1) {</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  --count;</div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  --bytes;</div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  *limbs++ = (limb_t)(bytes[0]);</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  }</div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  memset(limbs, 0, count * <span class="keyword">sizeof</span>(limb_t));</div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_32BIT</span></div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="preprocessor"></span> bytes += len;</div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">while</span> (count > 0 && len >= 4) {</div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  --count;</div>
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<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  bytes -= 4;</div>
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<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  len -= 4;</div>
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  *limbs++ = ((limb_t)(bytes[3])) |</div>
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  (((limb_t)(bytes[2])) << 8) |</div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  (((limb_t)(bytes[1])) << 16) |</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  (((limb_t)(bytes[0])) << 24);</div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  }</div>
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<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">if</span> (count > 0) {</div>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">if</span> (len == 3) {</div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  --count;</div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  bytes -= 3;</div>
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  *limbs++ = ((limb_t)(bytes[2])) |</div>
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  (((limb_t)(bytes[1])) << 8) |</div>
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<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  (((limb_t)(bytes[0])) << 16);</div>
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<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (len == 2) {</div>
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  --count;</div>
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  bytes -= 2;</div>
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<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  *limbs++ = ((limb_t)(bytes[1])) |</div>
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<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  (((limb_t)(bytes[0])) << 8);</div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (len == 1) {</div>
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<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  --count;</div>
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<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  --bytes;</div>
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<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  *limbs++ = (limb_t)(bytes[0]);</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"> 216</span>  }</div>
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  memset(limbs, 0, count * <span class="keyword">sizeof</span>(limb_t));</div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_64BIT</span></div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="preprocessor"></span> bytes += len;</div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">while</span> (count > 0 && len >= 8) {</div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  --count;</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  bytes -= 8;</div>
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  len -= 8;</div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  *limbs++ = ((limb_t)(bytes[7])) |</div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  (((limb_t)(bytes[6])) << 8) |</div>
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  (((limb_t)(bytes[5])) << 16) |</div>
|
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  (((limb_t)(bytes[4])) << 24) |</div>
|
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  (((limb_t)(bytes[3])) << 32) |</div>
|
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  (((limb_t)(bytes[2])) << 40) |</div>
|
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  (((limb_t)(bytes[1])) << 48) |</div>
|
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  (((limb_t)(bytes[0])) << 56);</div>
|
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  }</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">if</span> (count > 0 && len > 0) {</div>
|
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  limb_t word = 0;</div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  uint8_t shift = 0;</div>
|
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">while</span> (len > 0 && shift < 64) {</div>
|
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  word |= (((limb_t)(*(--bytes))) << shift);</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  shift += 8;</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  --len;</div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  }</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  *limbs++ = word;</div>
|
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  --count;</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  }</div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  memset(limbs, 0, count * <span class="keyword">sizeof</span>(limb_t));</div>
|
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="preprocessor"></span>}</div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div>
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<div class="line"><a name="l00264"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#a989cd5f389ac5adc798d8767383e2810"> 264</a></span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a989cd5f389ac5adc798d8767383e2810">BigNumberUtil::packLE</a>(uint8_t *bytes, <span class="keywordtype">size_t</span> len,</div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keyword">const</span> limb_t *limbs, <span class="keywordtype">size_t</span> count)</div>
|
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> {</div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="preprocessor">#if BIGNUMBER_LIMB_8BIT</span></div>
|
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="preprocessor"></span> <span class="keywordflow">if</span> (len <= count) {</div>
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  memcpy(bytes, limbs, len);</div>
|
|
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  } <span class="keywordflow">else</span> {</div>
|
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  memcpy(bytes, limbs, count);</div>
|
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  memset(bytes + count, 0, len - count);</div>
|
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  }</div>
|
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="preprocessor">#elif CRYPTO_LITTLE_ENDIAN</span></div>
|
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="preprocessor"></span> count *= <span class="keyword">sizeof</span>(limb_t);</div>
|
|
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">if</span> (len <= count) {</div>
|
|
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  memcpy(bytes, limbs, len);</div>
|
|
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  memcpy(bytes, limbs, count);</div>
|
|
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  memset(bytes + count, 0, len - count);</div>
|
|
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  }</div>
|
|
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_16BIT</span></div>
|
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<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="preprocessor"></span> limb_t word;</div>
|
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">while</span> (count > 0 && len >= 2) {</div>
|
|
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  word = *limbs++;</div>
|
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  bytes[0] = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  bytes[1] = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  --count;</div>
|
|
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  len -= 2;</div>
|
|
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  bytes += 2;</div>
|
|
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div>
|
|
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">if</span> (count > 0 && len == 1) {</div>
|
|
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  bytes[0] = (uint8_t)(*limbs);</div>
|
|
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  --len;</div>
|
|
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  ++bytes;</div>
|
|
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  }</div>
|
|
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  memset(bytes, 0, len);</div>
|
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_32BIT</span></div>
|
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="preprocessor"></span> limb_t word;</div>
|
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">while</span> (count > 0 && len >= 4) {</div>
|
|
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  word = *limbs++;</div>
|
|
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  bytes[0] = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  bytes[1] = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  bytes[2] = (uint8_t)(word >> 16);</div>
|
|
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  bytes[3] = (uint8_t)(word >> 24);</div>
|
|
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  --count;</div>
|
|
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  len -= 4;</div>
|
|
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  bytes += 4;</div>
|
|
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  }</div>
|
|
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">if</span> (count > 0) {</div>
|
|
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordflow">if</span> (len == 3) {</div>
|
|
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  word = *limbs;</div>
|
|
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  bytes[0] = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  bytes[1] = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  bytes[2] = (uint8_t)(word >> 16);</div>
|
|
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  len -= 3;</div>
|
|
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  bytes += 3;</div>
|
|
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (len == 2) {</div>
|
|
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  word = *limbs;</div>
|
|
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  bytes[0] = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  bytes[1] = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  len -= 2;</div>
|
|
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  bytes += 2;</div>
|
|
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (len == 1) {</div>
|
|
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  bytes[0] = (uint8_t)(*limbs);</div>
|
|
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  --len;</div>
|
|
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  ++bytes;</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>  }</div>
|
|
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  memset(bytes, 0, len);</div>
|
|
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_64BIT</span></div>
|
|
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="preprocessor"></span> limb_t word;</div>
|
|
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">while</span> (count > 0 && len >= 8) {</div>
|
|
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  word = *limbs++;</div>
|
|
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  bytes[0] = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  bytes[1] = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  bytes[2] = (uint8_t)(word >> 16);</div>
|
|
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  bytes[3] = (uint8_t)(word >> 24);</div>
|
|
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  bytes[4] = (uint8_t)(word >> 32);</div>
|
|
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  bytes[5] = (uint8_t)(word >> 40);</div>
|
|
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  bytes[6] = (uint8_t)(word >> 48);</div>
|
|
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  bytes[7] = (uint8_t)(word >> 56);</div>
|
|
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  --count;</div>
|
|
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  len -= 8;</div>
|
|
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  bytes += 8;</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="keywordflow">if</span> (count > 0) {</div>
|
|
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  word = *limbs;</div>
|
|
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">while</span> (len > 0) {</div>
|
|
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  *bytes++ = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  word >>= 8;</div>
|
|
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  --len;</div>
|
|
<div class="line"><a name="l00353"></a><span class="lineno"> 353</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>  memset(bytes, 0, len);</div>
|
|
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="preprocessor">#endif</span></div>
|
|
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="preprocessor"></span>}</div>
|
|
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div>
|
|
<div class="line"><a name="l00375"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#af49dd38173ea0310776d283aabea2ba0"> 375</a></span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#af49dd38173ea0310776d283aabea2ba0">BigNumberUtil::packBE</a>(uint8_t *bytes, <span class="keywordtype">size_t</span> len,</div>
|
|
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="keyword">const</span> limb_t *limbs, <span class="keywordtype">size_t</span> count)</div>
|
|
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span> {</div>
|
|
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span> <span class="preprocessor">#if BIGNUMBER_LIMB_8BIT</span></div>
|
|
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> <span class="preprocessor"></span> <span class="keywordflow">if</span> (len > count) {</div>
|
|
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keywordtype">size_t</span> size = len - count;</div>
|
|
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  memset(bytes, 0, size);</div>
|
|
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  len -= size;</div>
|
|
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  bytes += size;</div>
|
|
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (len < count) {</div>
|
|
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  count = len;</div>
|
|
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  }</div>
|
|
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  limbs += count;</div>
|
|
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordflow">while</span> (count > 0) {</div>
|
|
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  --count;</div>
|
|
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  *bytes++ = *(--limbs);</div>
|
|
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  }</div>
|
|
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_16BIT</span></div>
|
|
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="preprocessor"></span> <span class="keywordtype">size_t</span> countBytes = count * <span class="keyword">sizeof</span>(limb_t);</div>
|
|
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  limb_t word;</div>
|
|
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="keywordflow">if</span> (len >= countBytes) {</div>
|
|
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordtype">size_t</span> size = len - countBytes;</div>
|
|
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  memset(bytes, 0, size);</div>
|
|
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  len -= size;</div>
|
|
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  bytes += size;</div>
|
|
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  limbs += count;</div>
|
|
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  count = len / <span class="keyword">sizeof</span>(limb_t);</div>
|
|
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  limbs += count;</div>
|
|
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">if</span> ((len & 1) != 0)</div>
|
|
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  *bytes++ = (uint8_t)(*limbs);</div>
|
|
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  }</div>
|
|
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keywordflow">while</span> (count > 0) {</div>
|
|
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  --count;</div>
|
|
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  word = *(--limbs);</div>
|
|
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  *bytes++ = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  *bytes++ = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  }</div>
|
|
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_32BIT</span></div>
|
|
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span> <span class="preprocessor"></span> <span class="keywordtype">size_t</span> countBytes = count * <span class="keyword">sizeof</span>(limb_t);</div>
|
|
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  limb_t word;</div>
|
|
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="keywordflow">if</span> (len >= countBytes) {</div>
|
|
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordtype">size_t</span> size = len - countBytes;</div>
|
|
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  memset(bytes, 0, size);</div>
|
|
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  len -= size;</div>
|
|
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  bytes += size;</div>
|
|
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  limbs += count;</div>
|
|
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  count = len / <span class="keyword">sizeof</span>(limb_t);</div>
|
|
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  limbs += count;</div>
|
|
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keywordflow">if</span> ((len & 3) == 3) {</div>
|
|
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  word = *limbs;</div>
|
|
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  *bytes++ = (uint8_t)(word >> 16);</div>
|
|
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  *bytes++ = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  *bytes++ = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((len & 3) == 2) {</div>
|
|
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  word = *limbs;</div>
|
|
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  *bytes++ = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  *bytes++ = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((len & 3) == 1) {</div>
|
|
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  *bytes++ = (uint8_t)(*limbs);</div>
|
|
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  }</div>
|
|
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  }</div>
|
|
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <span class="keywordflow">while</span> (count > 0) {</div>
|
|
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  --count;</div>
|
|
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  word = *(--limbs);</div>
|
|
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  *bytes++ = (uint8_t)(word >> 24);</div>
|
|
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  *bytes++ = (uint8_t)(word >> 16);</div>
|
|
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  *bytes++ = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  *bytes++ = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  }</div>
|
|
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> <span class="preprocessor">#elif BIGNUMBER_LIMB_64BIT</span></div>
|
|
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span> <span class="preprocessor"></span> <span class="keywordtype">size_t</span> countBytes = count * <span class="keyword">sizeof</span>(limb_t);</div>
|
|
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  limb_t word;</div>
|
|
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="keywordflow">if</span> (len >= countBytes) {</div>
|
|
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordtype">size_t</span> size = len - countBytes;</div>
|
|
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  memset(bytes, 0, size);</div>
|
|
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  len -= size;</div>
|
|
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  bytes += size;</div>
|
|
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  limbs += count;</div>
|
|
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  count = len / <span class="keyword">sizeof</span>(limb_t);</div>
|
|
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  limbs += count;</div>
|
|
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  uint8_t size = len & 7;</div>
|
|
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  uint8_t shift = size * 8;</div>
|
|
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  word = *limbs;</div>
|
|
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keywordflow">while</span> (size > 0) {</div>
|
|
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  shift -= 8;</div>
|
|
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  *bytes++ = (uint8_t)(word >> shift);</div>
|
|
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  --size;</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>  }</div>
|
|
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">while</span> (count > 0) {</div>
|
|
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  --count;</div>
|
|
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  word = *(--limbs);</div>
|
|
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  *bytes++ = (uint8_t)(word >> 56);</div>
|
|
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  *bytes++ = (uint8_t)(word >> 48);</div>
|
|
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  *bytes++ = (uint8_t)(word >> 40);</div>
|
|
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  *bytes++ = (uint8_t)(word >> 32);</div>
|
|
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  *bytes++ = (uint8_t)(word >> 24);</div>
|
|
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  *bytes++ = (uint8_t)(word >> 16);</div>
|
|
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  *bytes++ = (uint8_t)(word >> 8);</div>
|
|
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  *bytes++ = (uint8_t)word;</div>
|
|
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  }</div>
|
|
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="preprocessor">#endif</span></div>
|
|
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> <span class="preprocessor"></span>}</div>
|
|
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span> </div>
|
|
<div class="line"><a name="l00495"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#aa6904b2727af6b767fe041b1b7f27414"> 495</a></span> limb_t <a class="code" href="classBigNumberUtil.html#aa6904b2727af6b767fe041b1b7f27414">BigNumberUtil::add</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
|
|
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size)</div>
|
|
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> {</div>
|
|
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  dlimb_t carry = 0;</div>
|
|
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keywordflow">while</span> (size > 0) {</div>
|
|
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  carry += *x++;</div>
|
|
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  carry += *y++;</div>
|
|
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  *result++ = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  carry >>= LIMB_BITS;</div>
|
|
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  --size;</div>
|
|
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  }</div>
|
|
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keywordflow">return</span> (limb_t)carry;</div>
|
|
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span> }</div>
|
|
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span> </div>
|
|
<div class="line"><a name="l00522"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#a6618e03bfcb3086961df508b40cc1e67"> 522</a></span> limb_t <a class="code" href="classBigNumberUtil.html#a6618e03bfcb3086961df508b40cc1e67">BigNumberUtil::sub</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
|
|
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size)</div>
|
|
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span> {</div>
|
|
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  dlimb_t borrow = 0;</div>
|
|
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keywordflow">while</span> (size > 0) {</div>
|
|
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  borrow = ((dlimb_t)(*x++)) - (*y++) - ((borrow >> LIMB_BITS) & 0x01);</div>
|
|
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  *result++ = (limb_t)borrow;</div>
|
|
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  --size;</div>
|
|
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  }</div>
|
|
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="keywordflow">return</span> ((limb_t)(borrow >> LIMB_BITS)) & 0x01;</div>
|
|
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> }</div>
|
|
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span> </div>
|
|
<div class="line"><a name="l00546"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#a1c2c5484f2bf440ae292fd3dfd2d594f"> 546</a></span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a1c2c5484f2bf440ae292fd3dfd2d594f">BigNumberUtil::mul</a>(limb_t *result, <span class="keyword">const</span> limb_t *x, <span class="keywordtype">size_t</span> xcount,</div>
|
|
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> ycount)</div>
|
|
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span> {</div>
|
|
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keywordtype">size_t</span> i, j;</div>
|
|
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  dlimb_t carry;</div>
|
|
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  limb_t word;</div>
|
|
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keyword">const</span> limb_t *xx;</div>
|
|
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  limb_t *rr;</div>
|
|
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span> </div>
|
|
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  <span class="comment">// Multiply the lowest limb of y by x.</span></div>
|
|
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  carry = 0;</div>
|
|
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  word = y[0];</div>
|
|
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  xx = x;</div>
|
|
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  rr = result;</div>
|
|
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  <span class="keywordflow">for</span> (i = 0; i < xcount; ++i) {</div>
|
|
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  carry += ((dlimb_t)(*xx++)) * word;</div>
|
|
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  *rr++ = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  carry >>= LIMB_BITS;</div>
|
|
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  }</div>
|
|
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  *rr = (limb_t)carry;</div>
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<div class="line"><a name="l00566"></a><span class="lineno"> 566</span> </div>
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<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  <span class="comment">// Multiply and add the remaining limbs of y by x.</span></div>
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<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="keywordflow">for</span> (i = 1; i < ycount; ++i) {</div>
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<div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  word = y[i];</div>
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<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  carry = 0;</div>
|
|
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  xx = x;</div>
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|
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  rr = result + i;</div>
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|
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <span class="keywordflow">for</span> (j = 0; j < xcount; ++j) {</div>
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|
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  carry += ((dlimb_t)(*xx++)) * word;</div>
|
|
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  carry += *rr;</div>
|
|
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  *rr++ = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  carry >>= LIMB_BITS;</div>
|
|
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  }</div>
|
|
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  *rr = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  }</div>
|
|
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span> }</div>
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<div class="line"><a name="l00582"></a><span class="lineno"> 582</span> </div>
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<div class="line"><a name="l00598"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#a5af5f50c91594183da4e079d76702d34"> 598</a></span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a5af5f50c91594183da4e079d76702d34">BigNumberUtil::reduceQuick</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
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|
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size)</div>
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|
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span> {</div>
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<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  <span class="comment">// Subtract "y" from "x" and turn the borrow into an AND mask.</span></div>
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|
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  limb_t mask = <a class="code" href="classBigNumberUtil.html#a6618e03bfcb3086961df508b40cc1e67">sub</a>(result, x, y, size);</div>
|
|
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  mask = (~mask) + 1;</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="comment">// Add "y" back to the result if the mask is non-zero.</span></div>
|
|
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  dlimb_t carry = 0;</div>
|
|
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <span class="keywordflow">while</span> (size > 0) {</div>
|
|
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  carry += *result;</div>
|
|
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  carry += (*y++ & mask);</div>
|
|
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  *result++ = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  carry >>= LIMB_BITS;</div>
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|
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  --size;</div>
|
|
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  }</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> </div>
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<div class="line"><a name="l00628"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#ab9a9f532fcfc182433adac44d8e4ee20"> 628</a></span> limb_t <a class="code" href="classBigNumberUtil.html#ab9a9f532fcfc182433adac44d8e4ee20">BigNumberUtil::add_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
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<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size)</div>
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<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>  dlimb_t carry = 0;</div>
|
|
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <span class="keywordflow">while</span> (size > 0) {</div>
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|
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  carry += *x++;</div>
|
|
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  carry += pgm_read_limb(y++);</div>
|
|
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  *result++ = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  carry >>= LIMB_BITS;</div>
|
|
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  --size;</div>
|
|
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  }</div>
|
|
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <span class="keywordflow">return</span> (limb_t)carry;</div>
|
|
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span> }</div>
|
|
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span> </div>
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<div class="line"><a name="l00655"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#af0fa1527647af42b65eda6b0aab982b3"> 655</a></span> limb_t <a class="code" href="classBigNumberUtil.html#af0fa1527647af42b65eda6b0aab982b3">BigNumberUtil::sub_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
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|
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size)</div>
|
|
<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>  dlimb_t borrow = 0;</div>
|
|
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  <span class="keywordflow">while</span> (size > 0) {</div>
|
|
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  borrow = ((dlimb_t)(*x++)) - pgm_read_limb(y++) - ((borrow >> LIMB_BITS) & 0x01);</div>
|
|
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  *result++ = (limb_t)borrow;</div>
|
|
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  --size;</div>
|
|
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  }</div>
|
|
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  <span class="keywordflow">return</span> ((limb_t)(borrow >> LIMB_BITS)) & 0x01;</div>
|
|
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span> }</div>
|
|
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span> </div>
|
|
<div class="line"><a name="l00680"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#aacdee1806a239eb9e58753ef1ddb964a"> 680</a></span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#aacdee1806a239eb9e58753ef1ddb964a">BigNumberUtil::mul_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x, <span class="keywordtype">size_t</span> xcount,</div>
|
|
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> ycount)</div>
|
|
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span> {</div>
|
|
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  <span class="keywordtype">size_t</span> i, j;</div>
|
|
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  dlimb_t carry;</div>
|
|
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  limb_t word;</div>
|
|
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  <span class="keyword">const</span> limb_t *xx;</div>
|
|
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  limb_t *rr;</div>
|
|
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span> </div>
|
|
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  <span class="comment">// Multiply the lowest limb of y by x.</span></div>
|
|
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  carry = 0;</div>
|
|
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  word = pgm_read_limb(&(y[0]));</div>
|
|
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  xx = x;</div>
|
|
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  rr = result;</div>
|
|
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  <span class="keywordflow">for</span> (i = 0; i < xcount; ++i) {</div>
|
|
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  carry += ((dlimb_t)(*xx++)) * word;</div>
|
|
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  *rr++ = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  carry >>= LIMB_BITS;</div>
|
|
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  }</div>
|
|
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  *rr = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span> </div>
|
|
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  <span class="comment">// Multiply and add the remaining limb of y by x.</span></div>
|
|
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  <span class="keywordflow">for</span> (i = 1; i < ycount; ++i) {</div>
|
|
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  word = pgm_read_limb(&(y[i]));</div>
|
|
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  carry = 0;</div>
|
|
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  xx = x;</div>
|
|
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  rr = result + i;</div>
|
|
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  <span class="keywordflow">for</span> (j = 0; j < xcount; ++j) {</div>
|
|
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  carry += ((dlimb_t)(*xx++)) * word;</div>
|
|
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  carry += *rr;</div>
|
|
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  *rr++ = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  carry >>= LIMB_BITS;</div>
|
|
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  }</div>
|
|
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  *rr = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  }</div>
|
|
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span> }</div>
|
|
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span> </div>
|
|
<div class="line"><a name="l00734"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#a00c9cde0b626788a60552a6bc9ce058b"> 734</a></span> <span class="keywordtype">void</span> <a class="code" href="classBigNumberUtil.html#a00c9cde0b626788a60552a6bc9ce058b">BigNumberUtil::reduceQuick_P</a>(limb_t *result, <span class="keyword">const</span> limb_t *x,</div>
|
|
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  <span class="keyword">const</span> limb_t *y, <span class="keywordtype">size_t</span> size)</div>
|
|
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span> {</div>
|
|
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  <span class="comment">// Subtract "y" from "x" and turn the borrow into an AND mask.</span></div>
|
|
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  limb_t mask = <a class="code" href="classBigNumberUtil.html#af0fa1527647af42b65eda6b0aab982b3">sub_P</a>(result, x, y, size);</div>
|
|
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  mask = (~mask) + 1;</div>
|
|
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span> </div>
|
|
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  <span class="comment">// Add "y" back to the result if the mask is non-zero.</span></div>
|
|
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  dlimb_t carry = 0;</div>
|
|
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  <span class="keywordflow">while</span> (size > 0) {</div>
|
|
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  carry += *result;</div>
|
|
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  carry += (pgm_read_limb(y++) & mask);</div>
|
|
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  *result++ = (limb_t)carry;</div>
|
|
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  carry >>= LIMB_BITS;</div>
|
|
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  --size;</div>
|
|
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  }</div>
|
|
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span> }</div>
|
|
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span> </div>
|
|
<div class="line"><a name="l00761"></a><span class="lineno"><a class="line" href="classBigNumberUtil.html#ad0aafacd8e224bd543341973c62ff1dd"> 761</a></span> limb_t <a class="code" href="classBigNumberUtil.html#ad0aafacd8e224bd543341973c62ff1dd">BigNumberUtil::isZero</a>(<span class="keyword">const</span> limb_t *x, <span class="keywordtype">size_t</span> size)</div>
|
|
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span> {</div>
|
|
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  limb_t word = 0;</div>
|
|
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  <span class="keywordflow">while</span> (size > 0) {</div>
|
|
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  word |= *x++;</div>
|
|
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  --size;</div>
|
|
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  }</div>
|
|
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  <span class="keywordflow">return</span> (limb_t)(((((dlimb_t)1) << LIMB_BITS) - word) >> LIMB_BITS);</div>
|
|
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span> }</div>
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<div class="ttc" id="classBigNumberUtil_html_a00c9cde0b626788a60552a6bc9ce058b"><div class="ttname"><a href="classBigNumberUtil.html#a00c9cde0b626788a60552a6bc9ce058b">BigNumberUtil::reduceQuick_P</a></div><div class="ttdeci">static void reduceQuick_P(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Reduces x modulo y using subtraction where y is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00734">BigNumberUtil.cpp:734</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_aa6904b2727af6b767fe041b1b7f27414"><div class="ttname"><a href="classBigNumberUtil.html#aa6904b2727af6b767fe041b1b7f27414">BigNumberUtil::add</a></div><div class="ttdeci">static limb_t add(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Adds two big numbers. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00495">BigNumberUtil.cpp:495</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_af0fa1527647af42b65eda6b0aab982b3"><div class="ttname"><a href="classBigNumberUtil.html#af0fa1527647af42b65eda6b0aab982b3">BigNumberUtil::sub_P</a></div><div class="ttdeci">static limb_t sub_P(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Subtracts one big number from another where one is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00655">BigNumberUtil.cpp:655</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_a5af5f50c91594183da4e079d76702d34"><div class="ttname"><a href="classBigNumberUtil.html#a5af5f50c91594183da4e079d76702d34">BigNumberUtil::reduceQuick</a></div><div class="ttdeci">static void reduceQuick(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Reduces x modulo y using subtraction. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00598">BigNumberUtil.cpp:598</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_a6618e03bfcb3086961df508b40cc1e67"><div class="ttname"><a href="classBigNumberUtil.html#a6618e03bfcb3086961df508b40cc1e67">BigNumberUtil::sub</a></div><div class="ttdeci">static limb_t sub(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Subtracts one big number from another. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00522">BigNumberUtil.cpp:522</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_aacdee1806a239eb9e58753ef1ddb964a"><div class="ttname"><a href="classBigNumberUtil.html#aacdee1806a239eb9e58753ef1ddb964a">BigNumberUtil::mul_P</a></div><div class="ttdeci">static void mul_P(limb_t *result, const limb_t *x, size_t xcount, const limb_t *y, size_t ycount)</div><div class="ttdoc">Multiplies two big numbers where one is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00680">BigNumberUtil.cpp:680</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_af49dd38173ea0310776d283aabea2ba0"><div class="ttname"><a href="classBigNumberUtil.html#af49dd38173ea0310776d283aabea2ba0">BigNumberUtil::packBE</a></div><div class="ttdeci">static void packBE(uint8_t *bytes, size_t len, const limb_t *limbs, size_t count)</div><div class="ttdoc">Packs the big-endian byte representation of a big number into a byte array. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00375">BigNumberUtil.cpp:375</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_a25041f898c417c8dd63f30536287ed79"><div class="ttname"><a href="classBigNumberUtil.html#a25041f898c417c8dd63f30536287ed79">BigNumberUtil::unpackLE</a></div><div class="ttdeci">static void unpackLE(limb_t *limbs, size_t count, const uint8_t *bytes, size_t len)</div><div class="ttdoc">Unpacks the little-endian byte representation of a big number into a limb array. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00055">BigNumberUtil.cpp:55</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_a1c2c5484f2bf440ae292fd3dfd2d594f"><div class="ttname"><a href="classBigNumberUtil.html#a1c2c5484f2bf440ae292fd3dfd2d594f">BigNumberUtil::mul</a></div><div class="ttdeci">static void mul(limb_t *result, const limb_t *x, size_t xcount, const limb_t *y, size_t ycount)</div><div class="ttdoc">Multiplies two big numbers. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00546">BigNumberUtil.cpp:546</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_a63f9d7884eb36227d39e1b95e219d865"><div class="ttname"><a href="classBigNumberUtil.html#a63f9d7884eb36227d39e1b95e219d865">BigNumberUtil::unpackBE</a></div><div class="ttdeci">static void unpackBE(limb_t *limbs, size_t count, const uint8_t *bytes, size_t len)</div><div class="ttdoc">Unpacks the big-endian byte representation of a big number into a limb array. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00163">BigNumberUtil.cpp:163</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_a989cd5f389ac5adc798d8767383e2810"><div class="ttname"><a href="classBigNumberUtil.html#a989cd5f389ac5adc798d8767383e2810">BigNumberUtil::packLE</a></div><div class="ttdeci">static void packLE(uint8_t *bytes, size_t len, const limb_t *limbs, size_t count)</div><div class="ttdoc">Packs the little-endian byte representation of a big number into a byte array. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00264">BigNumberUtil.cpp:264</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_ad0aafacd8e224bd543341973c62ff1dd"><div class="ttname"><a href="classBigNumberUtil.html#ad0aafacd8e224bd543341973c62ff1dd">BigNumberUtil::isZero</a></div><div class="ttdeci">static limb_t isZero(const limb_t *x, size_t size)</div><div class="ttdoc">Determine if a big number is zero. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00761">BigNumberUtil.cpp:761</a></div></div>
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<div class="ttc" id="classBigNumberUtil_html_ab9a9f532fcfc182433adac44d8e4ee20"><div class="ttname"><a href="classBigNumberUtil.html#ab9a9f532fcfc182433adac44d8e4ee20">BigNumberUtil::add_P</a></div><div class="ttdeci">static limb_t add_P(limb_t *result, const limb_t *x, const limb_t *y, size_t size)</div><div class="ttdoc">Adds two big numbers where one of them is in program memory. </div><div class="ttdef"><b>Definition:</b> <a href="BigNumberUtil_8cpp_source.html#l00628">BigNumberUtil.cpp:628</a></div></div>
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