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<div class="title">stringconcat.hxx</div> </div>
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<a href="a00388.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */</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"> * This file is part of the LibreOffice project.</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"> * This Source Code Form is subject to the terms of the Mozilla Public</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * License, v. 2.0. If a copy of the MPL was not distributed with this</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * file, You can obtain one at http://mozilla.org/MPL/2.0/.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#ifndef INCLUDED_RTL_STRINGCONCAT_HXX</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor"></span><span class="preprocessor">#define INCLUDED_RTL_STRINGCONCAT_HXX</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "<a class="code" href="a00389.html">rtl/stringutils.hxx</a>"</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">#include <cstddef></span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <<a class="code" href="a00386.html">string.h</a>></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">#ifdef LIBO_INTERNAL_ONLY // "RTL_FAST_STRING"</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#if defined RTL_STRING_UNITTEST_CONCAT</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor"></span><span class="keyword">extern</span> <span class="keywordtype">bool</span> rtl_string_unittest_invalid_concat;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#ifdef RTL_STRING_UNITTEST</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor"></span><span class="preprocessor">#define rtl rtlunittest</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"></span><span class="keyword">namespace </span>rtl</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="preprocessor">#ifdef RTL_STRING_UNITTEST</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor"></span><span class="preprocessor">#undef rtl</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">Implementation of efficient string concatenation.</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"></span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">The whole system is built around two basic template classes:</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">- ToStringHelper< T > - for each T it can give the length of the resulting string representation and can write</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> this string representation to a buffer</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">- O(U)StringConcat< T1, T2 > - operator+ now, instead of creating O(U)String object, returns only this helper object,</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> that keeps a reference to both operator+ operands; only when converted to O(U)String it will actually create</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> the resulting string object using ToStringHelper, creating directly the resulting object without any string</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> intermediate objects</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">As all the code is inline methods, it allows for extensive optimization and will usually result in very effective code</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">(even surpassing strlen/strcat and equalling handwritten), while allowing for very easy and intuitive syntax.</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> </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T ></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">struct </span>ToStringHelper</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  {</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> length( <span class="keyword">const</span> T& );</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">static</span> <span class="keywordtype">char</span>* addData( <span class="keywordtype">char</span>* buffer, <span class="keyword">const</span> T& ) SAL_RETURNS_NONNULL;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  static <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* addData( <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* buffer, const T& ) SAL_RETURNS_NONNULL;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  static const <span class="keywordtype">bool</span> allowOStringConcat = false;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  static const <span class="keywordtype">bool</span> allowOUStringConcat = false;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  };</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> inline</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="keywordtype">char</span>* addDataHelper( <span class="keywordtype">char</span>* buffer, const <span class="keywordtype">char</span>* data, <span class="keywordtype">int</span> length )</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  {</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  memcpy( buffer, data, length );</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> buffer + length;</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> <span class="keyword">inline</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* addDataHelper( <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* buffer, <span class="keyword">const</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* data, <span class="keywordtype">int</span> length )</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  {</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  memcpy( buffer, data, length * <span class="keyword">sizeof</span>( <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a> ));</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">return</span> buffer + length;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  }</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">inline</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* addDataLiteral( <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* buffer, <span class="keyword">const</span> <span class="keywordtype">char</span>* data, <span class="keywordtype">int</span> length )</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  {</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">while</span>( length-- > 0 )</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  *buffer++ = *data++;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">return</span> buffer;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  }</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="keywordtype">char</span>* addDataCString( <span class="keywordtype">char</span>* buffer, <span class="keyword">const</span> <span class="keywordtype">char</span>* str )</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">while</span>( *str != <span class="charliteral">'\0'</span> )</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  *buffer++ = *str++;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">return</span> buffer;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  }</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* addDataUString( <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* buffer, <span class="keyword">const</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* str )</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  {</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">while</span>( *str != <span class="charliteral">'\0'</span> )</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  *buffer++ = *str++;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> buffer;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword">template</span><></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keyword">struct </span>ToStringHelper< const char* ></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  {</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> length( <span class="keyword">const</span> <span class="keywordtype">char</span>* str ) {</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> <a class="code" href="a00457.html#a2666acfec1b68eacc0f5863235003603">sal::static_int_cast</a><<span class="keywordtype">int</span>>(strlen( str ));</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  }</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">static</span> <span class="keywordtype">char</span>* addData( <span class="keywordtype">char</span>* buffer, <span class="keyword">const</span> <span class="keywordtype">char</span>* str ) { <span class="keywordflow">return</span> addDataCString( buffer, str ); }</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOStringConcat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOUStringConcat = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  };</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="keyword">template</span><></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">struct </span>ToStringHelper< char* ></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> length( <span class="keyword">const</span> <span class="keywordtype">char</span>* str ) {</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">return</span> <a class="code" href="a00457.html#a2666acfec1b68eacc0f5863235003603">sal::static_int_cast</a><<span class="keywordtype">int</span>>(strlen( str ));</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">static</span> <span class="keywordtype">char</span>* addData( <span class="keywordtype">char</span>* buffer, <span class="keyword">const</span> <span class="keywordtype">char</span>* str ) { <span class="keywordflow">return</span> addDataCString( buffer, str ); }</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOStringConcat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOUStringConcat = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  };</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">template</span>< <span class="keywordtype">int</span> N ></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="keyword">struct </span>ToStringHelper< char[ N ] ></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  {</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> length( <span class="keyword">const</span> <span class="keywordtype">char</span> str[ N ] ) {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">return</span> <a class="code" href="a00457.html#a2666acfec1b68eacc0f5863235003603">sal::static_int_cast</a><<span class="keywordtype">int</span>>(strlen( str ));</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keyword">static</span> <span class="keywordtype">char</span>* addData( <span class="keywordtype">char</span>* buffer, <span class="keyword">const</span> <span class="keywordtype">char</span> str[ N ] ) { <span class="keywordflow">return</span> addDataCString( buffer, str ); }</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keyword">static</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* addData( <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* buffer, <span class="keyword">const</span> <span class="keywordtype">char</span> str[ N ] ) { <span class="keywordflow">return</span> addDataLiteral( buffer, str, N - 1 ); }</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOStringConcat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOUStringConcat = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  };</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="keyword">template</span>< <span class="keywordtype">int</span> N ></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="keyword">struct </span>ToStringHelper< const char[ N ] ></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> length( <span class="keyword">const</span> <span class="keywordtype">char</span> str[ N ] ) { (void)str; assert( strlen( str ) == N - 1 ); <span class="keywordflow">return</span> N - 1; }</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keyword">static</span> <span class="keywordtype">char</span>* addData( <span class="keywordtype">char</span>* buffer, <span class="keyword">const</span> <span class="keywordtype">char</span> str[ N ] ) { <span class="keywordflow">return</span> addDataHelper( buffer, str, N - 1 ); }</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">static</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* addData( <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* buffer, <span class="keyword">const</span> <span class="keywordtype">char</span> str[ N ] ) { <span class="keywordflow">return</span> addDataLiteral( buffer, str, N - 1 ); }</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOStringConcat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOUStringConcat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  };</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="keyword">template</span><std::<span class="keywordtype">size_t</span> N> <span class="keyword">struct </span>ToStringHelper<<a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a> const[N]> {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> length(<a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a> <span class="keyword">const</span>[N]) { <span class="keywordflow">return</span> N - 1; }</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keyword">static</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a> * addData(<a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a> * buffer, <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a> <span class="keyword">const</span> str[N])</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  { <span class="keywordflow">return</span> addDataHelper(buffer, str, N - 1); }</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> allowOStringConcat = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> allowOUStringConcat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> };</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> </div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="keyword">template</span><> <span class="keyword">struct </span>ToStringHelper<OUStringLiteral1_> {</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> length(OUStringLiteral1_) { <span class="keywordflow">return</span> 1; }</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keyword">static</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a> * addData(</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a> * buffer, OUStringLiteral1_ literal)</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  { <span class="keywordflow">return</span> addDataHelper(buffer, &literal.c, 1); }</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> allowOStringConcat = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span> <span class="keyword">const</span> allowOUStringConcat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> };</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T1, <span class="keyword">typename</span> T2 ></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="keyword">struct </span>OStringConcat</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  {</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  OStringConcat( <span class="keyword">const</span> T1& left_, <span class="keyword">const</span> T2& right_ ) : left( left_ ), right( right_ ) {}</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordtype">int</span> length()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> ToStringHelper< T1 >::length( left ) + ToStringHelper< T2 >::length( right ); }</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordtype">char</span>* addData( <span class="keywordtype">char</span>* buffer ) <span class="keyword">const</span> SAL_RETURNS_NONNULL { <span class="keywordflow">return</span> ToStringHelper< T2 >::addData( ToStringHelper< T1 >::addData( buffer, left ), right ); }</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">// NOTE here could be functions that would forward to the "real" temporary OString. Note however that e.g. getStr()</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">// is not so simple, as the OString temporary must live long enough (i.e. can't be created here in a function, a wrapper</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">// temporary object containing it must be returned instead).</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keyword">private</span>:</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keyword">const</span> T1& left;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keyword">const</span> T2& right;</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  };</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T1, <span class="keyword">typename</span> T2 ></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="keyword">struct </span>OUStringConcat</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  {</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  OUStringConcat( <span class="keyword">const</span> T1& left_, <span class="keyword">const</span> T2& right_ ) : left( left_ ), right( right_ ) {}</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordtype">int</span> length()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> ToStringHelper< T1 >::length( left ) + ToStringHelper< T2 >::length( right ); }</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* addData( <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* buffer ) <span class="keyword">const</span> SAL_RETURNS_NONNULL { <span class="keywordflow">return</span> ToStringHelper< T2 >::addData( ToStringHelper< T1 >::addData( buffer, left ), right ); }</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keyword">private</span>:</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keyword">const</span> T1& left;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keyword">const</span> T2& right;</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  };</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> </div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T1, <span class="keyword">typename</span> T2 ></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="keyword">struct </span>ToStringHelper< OStringConcat< T1, T2 > ></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  {</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> length( <span class="keyword">const</span> OStringConcat< T1, T2 >& c ) { <span class="keywordflow">return</span> c.length(); }</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keyword">static</span> <span class="keywordtype">char</span>* addData( <span class="keywordtype">char</span>* buffer, <span class="keyword">const</span> OStringConcat< T1, T2 >& c ) SAL_RETURNS_NONNULL { <span class="keywordflow">return</span> c.addData( buffer ); }</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOStringConcat = ToStringHelper< T1 >::allowOStringConcat && ToStringHelper< T2 >::allowOStringConcat;</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOUStringConcat = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  };</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T1, <span class="keyword">typename</span> T2 ></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="keyword">struct </span>ToStringHelper< OUStringConcat< T1, T2 > ></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  {</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> length( <span class="keyword">const</span> OUStringConcat< T1, T2 >& c ) { <span class="keywordflow">return</span> c.length(); }</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keyword">static</span> <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* addData( <a class="code" href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a>* buffer, <span class="keyword">const</span> OUStringConcat< T1, T2 >& c ) SAL_RETURNS_NONNULL { <span class="keywordflow">return</span> c.addData( buffer ); }</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOStringConcat = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> allowOUStringConcat = ToStringHelper< T1 >::allowOUStringConcat && ToStringHelper< T2 >::allowOUStringConcat;</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  };</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T1, <span class="keyword">typename</span> T2 ></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> [[nodiscard]]</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="keyword">typename</span> libreoffice_internal::Enable< OStringConcat< T1, T2 >, ToStringHelper< T1 >::allowOStringConcat && ToStringHelper< T2 >::allowOStringConcat >::Type operator+( <span class="keyword">const</span> T1& left, <span class="keyword">const</span> T2& right )</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  {</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordflow">return</span> OStringConcat< T1, T2 >( left, right );</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  }</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> </div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment">// char[N] and const char[N] need to be done explicitly, otherwise the compiler likes to treat them the same way for some reason</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T, <span class="keywordtype">int</span> N ></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> [[nodiscard]]</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="keyword">typename</span> libreoffice_internal::Enable< OStringConcat< T, const char[ N ] >, ToStringHelper< T >::allowOStringConcat >::Type operator+( <span class="keyword">const</span> T& left, <span class="keyword">const</span> <span class="keywordtype">char</span> (&right)[ N ] )</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  {</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">return</span> OStringConcat< T, const char[ N ] >( left, right );</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  }</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> </div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T, <span class="keywordtype">int</span> N ></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> [[nodiscard]]</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="keyword">typename</span> libreoffice_internal::Enable< OStringConcat< const char[ N ], T >, ToStringHelper< T >::allowOStringConcat >::Type operator+( <span class="keyword">const</span> <span class="keywordtype">char</span> (&left)[ N ], <span class="keyword">const</span> T& right )</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  {</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">return</span> OStringConcat< const char[ N ], T >( left, right );</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  }</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T, <span class="keywordtype">int</span> N ></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> [[nodiscard]]</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="keyword">typename</span> libreoffice_internal::Enable< OStringConcat< T, char[ N ] >, ToStringHelper< T >::allowOStringConcat >::Type operator+( <span class="keyword">const</span> T& left, <span class="keywordtype">char</span> (&right)[ N ] )</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  {</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">return</span> OStringConcat< T, char[ N ] >( left, right );</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  }</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T, <span class="keywordtype">int</span> N ></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> [[nodiscard]]</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="keyword">typename</span> libreoffice_internal::Enable< OStringConcat< char[ N ], T >, ToStringHelper< T >::allowOStringConcat >::Type operator+( <span class="keywordtype">char</span> (&left)[ N ], <span class="keyword">const</span> T& right )</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  {</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">return</span> OStringConcat< char[ N ], T >( left, right );</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  }</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T1, <span class="keyword">typename</span> T2 ></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> [[nodiscard]]</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="keyword">typename</span> libreoffice_internal::Enable< OUStringConcat< T1, T2 >, ToStringHelper< T1 >::allowOUStringConcat && ToStringHelper< T2 >::allowOUStringConcat >::Type operator+( <span class="keyword">const</span> T1& left, <span class="keyword">const</span> T2& right )</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  {</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">return</span> OUStringConcat< T1, T2 >( left, right );</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  }</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T1, <span class="keyword">typename</span> T2 ></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> [[nodiscard]]</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="keyword">typename</span> libreoffice_internal::Enable< OUStringConcat< T1, T2 >, ToStringHelper< T1 >::allowOUStringConcat && ToStringHelper< T2 >::allowOUStringConcat && libreoffice_internal::ConstCharArrayDetector< T1, void >::ok >::Type operator+( T1& left, <span class="keyword">const</span> T2& right )</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  {</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordflow">return</span> OUStringConcat< T1, T2 >( left, right );</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  }</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> </div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T1, <span class="keyword">typename</span> T2 ></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> [[nodiscard]]</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="keyword">typename</span> libreoffice_internal::Enable< OUStringConcat< T1, T2 >, ToStringHelper< T1 >::allowOUStringConcat && ToStringHelper< T2 >::allowOUStringConcat && libreoffice_internal::ConstCharArrayDetector< T2, void >::ok >::Type operator+( <span class="keyword">const</span> T1& left, T2& right )</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  {</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">return</span> OUStringConcat< T1, T2 >( left, right );</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  }</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> </div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="preprocessor">#ifdef RTL_STRING_UNITTEST_CONCAT</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="preprocessor"></span><span class="comment">// Special overload to catch the remaining invalid combinations. The helper struct must</span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="comment">// be used to make this operator+ overload a worse choice than all the existing overloads above.</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="keyword">struct </span>StringConcatInvalid</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  {</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keyword">template</span>< <span class="keyword">typename</span> T ></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  StringConcatInvalid( <span class="keyword">const</span> T& ) {}</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  };</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="keyword">template</span>< <span class="keyword">typename</span> T ></div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="keyword">inline</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> <span class="keywordtype">int</span> operator+( <span class="keyword">const</span> StringConcatInvalid&, <span class="keyword">const</span> T& )</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  {</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  rtl_string_unittest_invalid_concat = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">return</span> 0; <span class="comment">// doesn't matter</span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  }</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> } <span class="comment">// namespace</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> </div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="preprocessor">#endif</span></div>
<div class="ttc" id="a00457_html_a2666acfec1b68eacc0f5863235003603"><div class="ttname"><a href="a00457.html#a2666acfec1b68eacc0f5863235003603">sal::static_int_cast</a></div><div class="ttdeci">T1 static_int_cast(T2 n)</div><div class="ttdoc">A static_cast between integral types, to avoid C++ compiler warnings. </div><div class="ttdef"><b>Definition:</b> types.h:429</div></div>
<div class="ttc" id="a00386_html"><div class="ttname"><a href="a00386.html">string.h</a></div></div>
<div class="ttc" id="a00409_html_aa610619c9a4164b4cd9b6a86351da3cd"><div class="ttname"><a href="a00409.html#aa610619c9a4164b4cd9b6a86351da3cd">sal_Unicode</a></div><div class="ttdeci">sal_uInt16 sal_Unicode</div><div class="ttdef"><b>Definition:</b> types.h:141</div></div>
<div class="ttc" id="a00389_html"><div class="ttname"><a href="a00389.html">stringutils.hxx</a></div></div>
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