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<div class="title">ieee754.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Tencent is pleased to support the open source community by making RapidJSON available.</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// </span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// Licensed under the MIT License (the "License"); you may not use this file except</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// in compliance with the License. You may obtain a copy of the License at</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// http://opensource.org/licenses/MIT</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">//</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software distributed </span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR </span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// CONDITIONS OF ANY KIND, either express or implied. See the License for the </span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// specific language governing permissions and limitations under the License.</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#ifndef RAPIDJSON_IEEE754_</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#define RAPIDJSON_IEEE754_</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "../rapidjson.h"</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> RAPIDJSON_NAMESPACE_BEGIN</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>internal {</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">class </span>Double {</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  Double() {}</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  Double(<span class="keywordtype">double</span> d) : d_(d) {}</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  Double(uint64_t u) : u_(u) {}</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordtype">double</span> <a class="code" href="namespacerapidjson.html#aa65fc9fb381b2cbc54f98673eadd6505">Value</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_; }</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  uint64_t Uint64Value()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> u_; }</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordtype">double</span> NextPositiveDouble()<span class="keyword"> const </span>{</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <a class="code" href="group___r_a_p_i_d_j_s_o_n___c_o_n_f_i_g.html#gabeba18d612187bad2ac62aed9276d47c">RAPIDJSON_ASSERT</a>(!Sign());</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordflow">return</span> Double(u_ + 1).Value();</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  }</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordtype">bool</span> Sign()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (u_ & kSignMask) != 0; }</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  uint64_t Significand()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> u_ & kSignificandMask; }</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordtype">int</span> Exponent()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(((u_ & kExponentMask) >> kSignificandSize) - kExponentBias); }</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">bool</span> IsNan()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (u_ & kExponentMask) == kExponentMask && Significand() != 0; }</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordtype">bool</span> IsInf()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (u_ & kExponentMask) == kExponentMask && Significand() == 0; }</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">bool</span> IsNanOrInf()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (u_ & kExponentMask) == kExponentMask; }</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keywordtype">bool</span> IsNormal()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (u_ & kExponentMask) != 0 || Significand() == 0; }</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordtype">bool</span> IsZero()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (u_ & (kExponentMask | kSignificandMask)) == 0; }</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  uint64_t IntegerSignificand()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> IsNormal() ? Significand() | kHiddenBit : Significand(); }</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">int</span> IntegerExponent()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (IsNormal() ? Exponent() : kDenormalExponent) - kSignificandSize; }</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  uint64_t ToBias()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> (u_ & kSignMask) ? ~u_ + 1 : u_ | kSignMask; }</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keyword">static</span> <span class="keywordtype">unsigned</span> EffectiveSignificandSize(<span class="keywordtype">int</span> order) {</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">if</span> (order >= -1021)</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">return</span> 53;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (order <= -1074)</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span><span class="keywordtype">unsigned</span><span class="keyword">></span>(order) + 1074;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  }</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> kSignificandSize = 52;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> kExponentBias = 0x3FF;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> kDenormalExponent = 1 - kExponentBias;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keyword">static</span> <span class="keyword">const</span> uint64_t kSignMask = <a class="code" href="rapidjson_8h.html#aaee1245f375a71be1ac9b8a07ba5fb8f">RAPIDJSON_UINT64_C2</a>(0x80000000, 0x00000000);</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">static</span> <span class="keyword">const</span> uint64_t kExponentMask = <a class="code" href="rapidjson_8h.html#aaee1245f375a71be1ac9b8a07ba5fb8f">RAPIDJSON_UINT64_C2</a>(0x7FF00000, 0x00000000);</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">static</span> <span class="keyword">const</span> uint64_t kSignificandMask = <a class="code" href="rapidjson_8h.html#aaee1245f375a71be1ac9b8a07ba5fb8f">RAPIDJSON_UINT64_C2</a>(0x000FFFFF, 0xFFFFFFFF);</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">static</span> <span class="keyword">const</span> uint64_t kHiddenBit = <a class="code" href="rapidjson_8h.html#aaee1245f375a71be1ac9b8a07ba5fb8f">RAPIDJSON_UINT64_C2</a>(0x00100000, 0x00000000);</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">union </span>{</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordtype">double</span> d_;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  uint64_t u_;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  };</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> };</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> } <span class="comment">// namespace internal</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> RAPIDJSON_NAMESPACE_END</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#endif // RAPIDJSON_IEEE754_</span></div><div class="ttc" id="namespacerapidjson_html_aa65fc9fb381b2cbc54f98673eadd6505"><div class="ttname"><a href="namespacerapidjson.html#aa65fc9fb381b2cbc54f98673eadd6505">rapidjson::Value</a></div><div class="ttdeci">GenericValue< UTF8<> > Value</div><div class="ttdoc">GenericValue with UTF8 encoding </div><div class="ttdef"><b>Definition:</b> document.h:2010</div></div>
<div class="ttc" id="rapidjson_8h_html_aaee1245f375a71be1ac9b8a07ba5fb8f"><div class="ttname"><a href="rapidjson_8h.html#aaee1245f375a71be1ac9b8a07ba5fb8f">RAPIDJSON_UINT64_C2</a></div><div class="ttdeci">#define RAPIDJSON_UINT64_C2(high32, low32)</div><div class="ttdoc">Construct a 64-bit literal by a pair of 32-bit integer. </div><div class="ttdef"><b>Definition:</b> rapidjson.h:289</div></div>
<div class="ttc" id="group___r_a_p_i_d_j_s_o_n___c_o_n_f_i_g_html_gabeba18d612187bad2ac62aed9276d47c"><div class="ttname"><a href="group___r_a_p_i_d_j_s_o_n___c_o_n_f_i_g.html#gabeba18d612187bad2ac62aed9276d47c">RAPIDJSON_ASSERT</a></div><div class="ttdeci">#define RAPIDJSON_ASSERT(x)</div><div class="ttdoc">Assertion. </div><div class="ttdef"><b>Definition:</b> rapidjson.h:402</div></div>
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