mirror of
https://github.com/simdjson/simdjson
synced 2026-06-08 17:27:07 +00:00
lemire
222 lines
21 KiB
HTML
222 lines
21 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
|
|
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
|
|
<meta name="generator" content="Doxygen 1.9.1"/>
|
|
<meta name="viewport" content="width=device-width, initial-scale=1"/>
|
|
<title>simdjson: include/simdjson/generic/jsoncharutils.h Source File</title>
|
|
<link href="tabs.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="jquery.js"></script>
|
|
<script type="text/javascript" src="dynsections.js"></script>
|
|
<link href="navtree.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="resize.js"></script>
|
|
<script type="text/javascript" src="navtreedata.js"></script>
|
|
<script type="text/javascript" src="navtree.js"></script>
|
|
<link href="search/search.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="search/searchdata.js"></script>
|
|
<script type="text/javascript" src="search/search.js"></script>
|
|
<link href="doxygen.css" rel="stylesheet" type="text/css" />
|
|
<link href="doxygen-awesome.css" rel="stylesheet" type="text/css"/>
|
|
<link href="doxygen-awesome-sidebar-only.css" rel="stylesheet" type="text/css"/>
|
|
<link href="doxygen-awesome-sidebar-only-darkmode-toggle.css" rel="stylesheet" type="text/css"/>
|
|
</head>
|
|
<body>
|
|
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
|
|
<div id="titlearea">
|
|
<table cellspacing="0" cellpadding="0">
|
|
<tbody>
|
|
<tr style="height: 56px;">
|
|
<td id="projectlogo"><img alt="Logo" src="logotiny.png"/></td>
|
|
<td id="projectalign" style="padding-left: 0.5em;">
|
|
<div id="projectname">simdjson
|
|
 <span id="projectnumber">3.1.1</span>
|
|
</div>
|
|
<div id="projectbrief">Ridiculously Fast JSON</div>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
<!-- end header part -->
|
|
<!-- Generated by Doxygen 1.9.1 -->
|
|
<script type="text/javascript">
|
|
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
|
|
var searchBox = new SearchBox("searchBox", "search",false,'Search','.html');
|
|
/* @license-end */
|
|
</script>
|
|
<script type="text/javascript" src="menudata.js"></script>
|
|
<script type="text/javascript" src="menu.js"></script>
|
|
<script type="text/javascript">
|
|
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
|
|
$(function() {
|
|
initMenu('',true,false,'search.php','Search');
|
|
$(document).ready(function() { init_search(); });
|
|
});
|
|
/* @license-end */</script>
|
|
<div id="main-nav"></div>
|
|
</div><!-- top -->
|
|
<div id="side-nav" class="ui-resizable side-nav-resizable">
|
|
<div id="nav-tree">
|
|
<div id="nav-tree-contents">
|
|
<div id="nav-sync" class="sync"></div>
|
|
</div>
|
|
</div>
|
|
<div id="splitbar" style="-moz-user-select:none;"
|
|
class="ui-resizable-handle">
|
|
</div>
|
|
</div>
|
|
<script type="text/javascript">
|
|
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
|
|
$(document).ready(function(){initNavTree('jsoncharutils_8h_source.html',''); initResizable(); });
|
|
/* @license-end */
|
|
</script>
|
|
<div id="doc-content">
|
|
<!-- window showing the filter options -->
|
|
<div id="MSearchSelectWindow"
|
|
onmouseover="return searchBox.OnSearchSelectShow()"
|
|
onmouseout="return searchBox.OnSearchSelectHide()"
|
|
onkeydown="return searchBox.OnSearchSelectKey(event)">
|
|
</div>
|
|
|
|
<!-- iframe showing the search results (closed by default) -->
|
|
<div id="MSearchResultsWindow">
|
|
<iframe src="javascript:void(0)" frameborder="0"
|
|
name="MSearchResults" id="MSearchResults">
|
|
</iframe>
|
|
</div>
|
|
|
|
<div class="header">
|
|
<div class="headertitle">
|
|
<div class="title">jsoncharutils.h</div> </div>
|
|
</div><!--header-->
|
|
<div class="contents">
|
|
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#include "simdjson/internal/jsoncharutils_tables.h"</span></div>
|
|
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#include "simdjson/internal/numberparsing_tables.h"</span></div>
|
|
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>  </div>
|
|
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="keyword">namespace </span><a class="code" href="namespacesimdjson.html">simdjson</a> {</div>
|
|
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="keyword">namespace </span>SIMDJSON_IMPLEMENTATION {</div>
|
|
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="keyword">namespace </span>{</div>
|
|
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="keyword">namespace </span>jsoncharutils {</div>
|
|
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  </div>
|
|
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// return non-zero if not a structural or whitespace char</span></div>
|
|
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// zero otherwise</span></div>
|
|
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> simdjson_inline uint32_t is_not_structural_or_whitespace(uint8_t c) {</div>
|
|
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  <span class="keywordflow">return</span> internal::structural_or_whitespace_negated[c];</div>
|
|
<div class="line"><a name="l00013"></a><span class="lineno"> 13</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> simdjson_inline uint32_t is_structural_or_whitespace(uint8_t c) {</div>
|
|
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  <span class="keywordflow">return</span> internal::structural_or_whitespace[c];</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>  </div>
|
|
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">// returns a value with the high 16 bits set if not valid</span></div>
|
|
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// otherwise returns the conversion of the 4 hex digits at src into the bottom</span></div>
|
|
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// 16 bits of the 32-bit return register</span></div>
|
|
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// see</span></div>
|
|
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// https://lemire.me/blog/2019/04/17/parsing-short-hexadecimal-strings-efficiently/</span></div>
|
|
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t hex_to_u32_nocheck(</div>
|
|
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">const</span> uint8_t *src) { <span class="comment">// strictly speaking, static inline is a C-ism</span></div>
|
|
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  uint32_t v1 = internal::digit_to_val32[630 + src[0]];</div>
|
|
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  uint32_t v2 = internal::digit_to_val32[420 + src[1]];</div>
|
|
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  uint32_t v3 = internal::digit_to_val32[210 + src[2]];</div>
|
|
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  uint32_t v4 = internal::digit_to_val32[0 + src[3]];</div>
|
|
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordflow">return</span> v1 | v2 | v3 | v4;</div>
|
|
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> }</div>
|
|
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  </div>
|
|
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// given a code point cp, writes to c</span></div>
|
|
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// the utf-8 code, outputting the length in</span></div>
|
|
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// bytes, if the length is zero, the code point</span></div>
|
|
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">// is invalid</span></div>
|
|
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// This can possibly be made faster using pdep</span></div>
|
|
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">// and clz and table lookups, but JSON documents</span></div>
|
|
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// have few escaped code points, and the following</span></div>
|
|
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// function looks cheap.</span></div>
|
|
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// Note: we assume that surrogates are treated separately</span></div>
|
|
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> simdjson_inline <span class="keywordtype">size_t</span> codepoint_to_utf8(uint32_t cp, uint8_t *c) {</div>
|
|
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">if</span> (cp <= 0x7F) {</div>
|
|
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  c[0] = uint8_t(cp);</div>
|
|
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">return</span> 1; <span class="comment">// ascii</span></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="keywordflow">if</span> (cp <= 0x7FF) {</div>
|
|
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  c[0] = uint8_t((cp >> 6) + 192);</div>
|
|
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  c[1] = uint8_t((cp & 63) + 128);</div>
|
|
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> 2; <span class="comment">// universal plane</span></div>
|
|
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="comment">// Surrogates are treated elsewhere...</span></div>
|
|
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">//} //else if (0xd800 <= cp && cp <= 0xdfff) {</span></div>
|
|
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">// return 0; // surrogates // could put assert here</span></div>
|
|
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (cp <= 0xFFFF) {</div>
|
|
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  c[0] = uint8_t((cp >> 12) + 224);</div>
|
|
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  c[1] = uint8_t(((cp >> 6) & 63) + 128);</div>
|
|
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  c[2] = uint8_t((cp & 63) + 128);</div>
|
|
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">return</span> 3;</div>
|
|
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (cp <= 0x10FFFF) { <span class="comment">// if you know you have a valid code point, this</span></div>
|
|
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// is not needed</span></div>
|
|
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  c[0] = uint8_t((cp >> 18) + 240);</div>
|
|
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  c[1] = uint8_t(((cp >> 12) & 63) + 128);</div>
|
|
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  c[2] = uint8_t(((cp >> 6) & 63) + 128);</div>
|
|
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  c[3] = uint8_t((cp & 63) + 128);</div>
|
|
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">return</span> 4;</div>
|
|
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  }</div>
|
|
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="comment">// will return 0 when the code point was too large.</span></div>
|
|
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">return</span> 0; <span class="comment">// bad r</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="preprocessor">#if SIMDJSON_IS_32BITS </span><span class="comment">// _umul128 for x86, arm</span></div>
|
|
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">// this is a slow emulation routine for 32-bit</span></div>
|
|
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">//</span></div>
|
|
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">static</span> simdjson_inline uint64_t __emulu(uint32_t x, uint32_t y) {</div>
|
|
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">return</span> x * (uint64_t)y;</div>
|
|
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> }</div>
|
|
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="keyword">static</span> simdjson_inline uint64_t _umul128(uint64_t ab, uint64_t cd, uint64_t *hi) {</div>
|
|
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  uint64_t ad = __emulu((uint32_t)(ab >> 32), (uint32_t)cd);</div>
|
|
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  uint64_t bd = __emulu((uint32_t)ab, (uint32_t)cd);</div>
|
|
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  uint64_t adbc = ad + __emulu((uint32_t)ab, (uint32_t)(cd >> 32));</div>
|
|
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  uint64_t adbc_carry = !!(adbc < ad);</div>
|
|
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  uint64_t lo = bd + (adbc << 32);</div>
|
|
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  *hi = __emulu((uint32_t)(ab >> 32), (uint32_t)(cd >> 32)) + (adbc >> 32) +</div>
|
|
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  (adbc_carry << 32) + !!(lo < bd);</div>
|
|
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> lo;</div>
|
|
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> }</div>
|
|
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#endif</span></div>
|
|
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  </div>
|
|
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="keyword">using</span> internal::value128;</div>
|
|
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  </div>
|
|
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> simdjson_inline value128 full_multiplication(uint64_t value1, uint64_t value2) {</div>
|
|
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  value128 answer;</div>
|
|
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#if SIMDJSON_REGULAR_VISUAL_STUDIO || SIMDJSON_IS_32BITS</span></div>
|
|
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor">#ifdef _M_ARM64</span></div>
|
|
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">// ARM64 has native support for 64-bit multiplications, no need to emultate</span></div>
|
|
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  answer.high = __umulh(value1, value2);</div>
|
|
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  answer.low = value1 * value2;</div>
|
|
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor">#else</span></div>
|
|
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  answer.low = _umul128(value1, value2, &answer.high); <span class="comment">// _umul128 not available on ARM64</span></div>
|
|
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#endif </span><span class="comment">// _M_ARM64</span></div>
|
|
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor">#else </span><span class="comment">// SIMDJSON_REGULAR_VISUAL_STUDIO || SIMDJSON_IS_32BITS</span></div>
|
|
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  __uint128_t r = (<span class="keyword">static_cast<</span>__uint128_t<span class="keyword">></span>(value1)) * value2;</div>
|
|
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  answer.low = uint64_t(r);</div>
|
|
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  answer.high = uint64_t(r >> 64);</div>
|
|
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor">#endif</span></div>
|
|
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">return</span> answer;</div>
|
|
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> }</div>
|
|
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
|
|
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> } <span class="comment">// namespace jsoncharutils</span></div>
|
|
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> } <span class="comment">// unnamed namespace</span></div>
|
|
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> } <span class="comment">// namespace SIMDJSON_IMPLEMENTATION</span></div>
|
|
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> } <span class="comment">// namespace simdjson</span></div>
|
|
<div class="ttc" id="anamespacesimdjson_html"><div class="ttname"><a href="namespacesimdjson.html">simdjson</a></div><div class="ttdoc">We want to support argument-dependent lookup (ADL).</div><div class="ttdef"><b>Definition:</b> <a href="arm64_2bitmanipulation_8h_source.html#l00004">bitmanipulation.h:4</a></div></div>
|
|
</div><!-- fragment --></div><!-- contents -->
|
|
</div><!-- doc-content -->
|
|
<!-- start footer part -->
|
|
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
|
|
<ul>
|
|
<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_49a0b2767ded4a45005c5d6720a18cd1.html">simdjson</a></li><li class="navelem"><a class="el" href="dir_53368a02099cf3699f2996a5d88d70b6.html">generic</a></li><li class="navelem"><b>jsoncharutils.h</b></li>
|
|
<li class="footer">Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.1 </li>
|
|
</ul>
|
|
</div>
|
|
</body>
|
|
</html>
|