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<div class="title">filewritestream.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<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>&#160;<span class="comment">// </span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment">// Licensed under the MIT License (the &quot;License&quot;); you may not use this file except</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<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>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment">// http://opensource.org/licenses/MIT</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<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>&#160;<span class="comment">// under the License is distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR </span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<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>&#160;<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>&#160; </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor">#ifndef RAPIDJSON_FILEWRITESTREAM_H_</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="preprocessor">#define RAPIDJSON_FILEWRITESTREAM_H_</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160; </div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor">#include &quot;stream.h&quot;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#ifdef __clang__</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;RAPIDJSON_DIAG_PUSH</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;RAPIDJSON_DIAG_OFF(unreachable-code)</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;RAPIDJSON_NAMESPACE_BEGIN</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="comment">//! Wrapper of C file stream for output using fwrite().</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="comment"></span><span class="comment">/*!</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="comment"> \note implements Stream concept</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="classrapidjson_1_1_file_write_stream.html"> 32</a></span>&#160;<span class="keyword">class </span><a class="code" href="classrapidjson_1_1_file_write_stream.html">FileWriteStream</a> {</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="classrapidjson_1_1_file_write_stream.html#afc606cc81f6c3709d81bf99b30566330"> 34</a></span>&#160; <span class="keyword">typedef</span> <span class="keywordtype">char</span> <a class="code" href="classrapidjson_1_1_file_write_stream.html#afc606cc81f6c3709d81bf99b30566330">Ch</a>; <span class="comment">//!&lt; Character type. Only support char.</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <a class="code" href="classrapidjson_1_1_file_write_stream.html">FileWriteStream</a>(std::FILE* fp, <span class="keywordtype">char</span>* buffer, <span class="keywordtype">size_t</span> bufferSize) : fp_(fp), buffer_(buffer), bufferEnd_(buffer + bufferSize), current_(buffer_) { </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <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>(fp_ != 0);</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; }</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="keywordtype">void</span> Put(<span class="keywordtype">char</span> c) { </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keywordflow">if</span> (current_ &gt;= bufferEnd_)</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; Flush();</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; *current_++ = c;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; }</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keywordtype">void</span> PutN(<span class="keywordtype">char</span> c, <span class="keywordtype">size_t</span> n) {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <span class="keywordtype">size_t</span> avail = static_cast&lt;size_t&gt;(bufferEnd_ - current_);</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keywordflow">while</span> (n &gt; avail) {</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; std::memset(current_, c, avail);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; current_ += avail;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; Flush();</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; n -= avail;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; avail = static_cast&lt;size_t&gt;(bufferEnd_ - current_);</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; }</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keywordflow">if</span> (n &gt; 0) {</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; std::memset(current_, c, n);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; current_ += n;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; }</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; }</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keywordtype">void</span> Flush() {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordflow">if</span> (current_ != buffer_) {</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keywordtype">size_t</span> result = std::fwrite(buffer_, 1, static_cast&lt;size_t&gt;(current_ - buffer_), fp_);</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keywordflow">if</span> (result &lt; static_cast&lt;size_t&gt;(current_ - buffer_)) {</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="comment">// failure deliberately ignored at this time</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="comment">// added to avoid warn_unused_result build errors</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; }</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; current_ = buffer_;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; }</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; }</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; </div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="comment">// Not implemented</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keywordtype">char</span> Peek()<span class="keyword"> const </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>(<span class="keyword">false</span>); <span class="keywordflow">return</span> 0; }</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="keywordtype">char</span> Take() { <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>(<span class="keyword">false</span>); <span class="keywordflow">return</span> 0; }</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="keywordtype">size_t</span> Tell()<span class="keyword"> const </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>(<span class="keyword">false</span>); <span class="keywordflow">return</span> 0; }</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordtype">char</span>* PutBegin() { <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>(<span class="keyword">false</span>); <span class="keywordflow">return</span> 0; }</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordtype">size_t</span> PutEnd(<span class="keywordtype">char</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>(<span class="keyword">false</span>); <span class="keywordflow">return</span> 0; }</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="comment">// Prohibit copy constructor &amp; assignment operator.</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; FileWriteStream(<span class="keyword">const</span> FileWriteStream&amp;);</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; FileWriteStream&amp; operator=(<span class="keyword">const</span> FileWriteStream&amp;);</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; </div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; std::FILE* fp_;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keywordtype">char</span> *buffer_;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <span class="keywordtype">char</span> *bufferEnd_;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keywordtype">char</span> *current_;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;};</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;<span class="comment">//! Implement specialized version of PutN() with memset() for better performance.</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;<span class="comment"></span><span class="keyword">template</span>&lt;&gt;</div>
<div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="namespacerapidjson.html#a1ac13bac5976fc06587e00fc0bcfb32a"> 94</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="namespacerapidjson.html#a1ac13bac5976fc06587e00fc0bcfb32a">PutN</a>(<a class="code" href="classrapidjson_1_1_file_write_stream.html">FileWriteStream</a>&amp; stream, <span class="keywordtype">char</span> c, <span class="keywordtype">size_t</span> n) {</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; stream.PutN(c, n);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;}</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; </div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;RAPIDJSON_NAMESPACE_END</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;<span class="preprocessor">#ifdef __clang__</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;RAPIDJSON_DIAG_POP</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; </div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;<span class="preprocessor">#endif // RAPIDJSON_FILESTREAM_H_</span></div>
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<div class="ttc" id="aclassrapidjson_1_1_file_write_stream_html"><div class="ttname"><a href="classrapidjson_1_1_file_write_stream.html">rapidjson::FileWriteStream</a></div><div class="ttdoc">Wrapper of C file stream for output using fwrite().</div><div class="ttdef"><b>Definition:</b> filewritestream.h:32</div></div>
<div class="ttc" id="agroup___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:437</div></div>
<div class="ttc" id="aclassrapidjson_1_1_file_write_stream_html_afc606cc81f6c3709d81bf99b30566330"><div class="ttname"><a href="classrapidjson_1_1_file_write_stream.html#afc606cc81f6c3709d81bf99b30566330">rapidjson::FileWriteStream::Ch</a></div><div class="ttdeci">char Ch</div><div class="ttdoc">Character type. Only support char.</div><div class="ttdef"><b>Definition:</b> filewritestream.h:34</div></div>
<div class="ttc" id="anamespacerapidjson_html_a1ac13bac5976fc06587e00fc0bcfb32a"><div class="ttname"><a href="namespacerapidjson.html#a1ac13bac5976fc06587e00fc0bcfb32a">rapidjson::PutN</a></div><div class="ttdeci">void PutN(FileWriteStream &amp;stream, char c, size_t n)</div><div class="ttdoc">Implement specialized version of PutN() with memset() for better performance.</div><div class="ttdef"><b>Definition:</b> filewritestream.h:94</div></div>
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