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  53. <a name="wcslcat_002d_002d_002dconcatenate-wide_002dcharacter-strings-to-specified-length"></a>
  54. <h3 class="section">6.15 <code>wcslcat</code>&mdash;concatenate wide-character strings to specified length</h3>
  55. <p><strong>Synopsis</strong>
  56. </p><div class="example">
  57. <pre class="example">#include &lt;wchar.h&gt;
  58. size_t wcslcat(wchar_t *<var>dst</var>, const wchar_t *<var>src</var>, size_t <var>siz</var>);
  59. </pre></div>
  60. <p><strong>Description</strong><br>
  61. The <code>wcslcat</code> function appends wide characters from <var>src</var> to
  62. end of the <var>dst</var> wide-character string so that the resultant
  63. wide-character string is not more than <var>siz</var> wide characters
  64. including the terminating null wide-character code. A terminating
  65. null wide character is always added unless <var>siz</var> is 0. Thus,
  66. the maximum number of wide characters that can be appended from
  67. <var>src</var> is <var>siz</var> - 1. If copying takes place between objects
  68. that overlap, the behaviour is undefined.
  69. </p>
  70. <br>
  71. <p><strong>Returns</strong><br>
  72. Wide-character string length of initial <var>dst</var> plus the
  73. wide-character string length of <var>src</var> (does not include
  74. terminating null wide-characters). If the return value is
  75. greater than or equal to <var>siz</var>, then truncation occurred and
  76. not all wide characters from <var>src</var> were appended.
  77. </p>
  78. <br>
  79. <p><strong>Portability</strong><br>
  80. No supporting OS subroutines are required.
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