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 <h3 class="section">2.39 <code>wcsrtombs</code>, <code>wcsnrtombs</code>&mdash;convert a wide-character string to a character string</h3>

 <p><a name="index-wcsrtombs-90"></a><a name="index-g_t_005fwcsrtombs_005fr-91"></a><a name="index-wcsnrtombs-92"></a><a name="index-g_t_005fwcsnrtombs_005fr-93"></a><strong>Synopsis</strong>
 <pre class="example">     #include &lt;wchar.h&gt;
      size_t wcsrtombs(char *<var>dst</var>, const wchar_t **<var>src</var>, size_t <var>len</var>,
          mbstate_t *<var>ps</var>);

      #include &lt;wchar.h&gt;
      size_t _wcsrtombs_r(struct _reent *<var>ptr</var>, char *<var>dst</var>,
          const wchar_t **<var>src</var>, size_t <var>len</var>,
          mbstate_t *<var>ps</var>);

      #include &lt;wchar.h&gt;
      size_t wcsnrtombs(char *<var>dst</var>, const wchar_t **<var>src</var>,
          size_t <var>nwc</var>, size_t <var>len</var>, mbstate_t *<var>ps</var>);

      #include &lt;wchar.h&gt;
      size_t _wcsnrtombs_r(struct _reent *<var>ptr</var>, char *<var>dst</var>,
          const wchar_t **<var>src</var>, size_t <var>nwc</var>,
          size_t <var>len</var>, mbstate_t *<var>ps</var>);

 </pre>
    <p><strong>Description</strong><br>
 The <code>wcsrtombs</code> function converts a string of wide characters indirectly
 pointed to by <var>src</var> to a corresponding multibyte character string stored in
 the array pointed to by <var>dst</var>&gt;.  No more than <var>len</var> bytes are written to
 <var>dst</var>&gt;.

    <p>If <var>dst</var>&gt; is NULL, no characters are stored.

    <p>If <var>dst</var>&gt; is not NULL, the pointer pointed to by <var>src</var> is updated to point
 to the character after the one that conversion stopped at.  If conversion
 stops because a null character is encountered, *<var>src</var> is set to NULL.

    <p>The mbstate_t argument, <var>ps</var>, is used to keep track of the shift state.  If
 it is NULL, <code>wcsrtombs</code> uses an internal, static mbstate_t object, which
 is initialized to the initial conversion state at program startup.

    <p>The <code>wcsnrtombs</code> function behaves identically to <code>wcsrtombs</code>, except that
 conversion stops after reading at most <var>nwc</var> characters from the buffer
 pointed to by <var>src</var>.

    <p><br>
 <strong>Returns</strong><br>
 The <code>wcsrtombs</code> and <code>wcsnrtombs</code> functions return the number of bytes
 stored in the array pointed to by <var>dst</var> (not including any terminating
 null), if successful, otherwise it returns (size_t)-1.

    <p><br>
 <strong>Portability</strong><br>
 <code>wcsrtombs</code> is defined by C99 standard.
 <code>wcsnrtombs</code> is defined by the POSIX.1-2008 standard.

    <p><br>

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	<h3 class="section">2.39 <code>wcsrtombs</code>, <code>wcsnrtombs</code>—convert a wide-character string to a character string</h3>

	<p><a name="index-wcsrtombs-90"></a><a name="index-g_t_005fwcsrtombs_005fr-91"></a><a name="index-wcsnrtombs-92"></a><a name="index-g_t_005fwcsnrtombs_005fr-93"></a><strong>Synopsis</strong>
	<pre class="example"> #include <wchar.h>
	size_t wcsrtombs(char <var>dst</var>, const wchar_t *<var>src</var>, size_t <var>len</var>,
	mbstate_t *<var>ps</var>);

	#include <wchar.h>
	size_t _wcsrtombs_r(struct _reent <var>ptr</var>, char <var>dst</var>,
	const wchar_t **<var>src</var>, size_t <var>len</var>,
	mbstate_t *<var>ps</var>);

	#include <wchar.h>
	size_t wcsnrtombs(char <var>dst</var>, const wchar_t *<var>src</var>,
	size_t <var>nwc</var>, size_t <var>len</var>, mbstate_t *<var>ps</var>);

	#include <wchar.h>
	size_t _wcsnrtombs_r(struct _reent <var>ptr</var>, char <var>dst</var>,
	const wchar_t **<var>src</var>, size_t <var>nwc</var>,
	size_t <var>len</var>, mbstate_t *<var>ps</var>);

	</pre>
	<p><strong>Description</strong><br>
	The <code>wcsrtombs</code> function converts a string of wide characters indirectly
	pointed to by <var>src</var> to a corresponding multibyte character string stored in
	the array pointed to by <var>dst</var>>. No more than <var>len</var> bytes are written to
	<var>dst</var>>.

	<p>If <var>dst</var>> is NULL, no characters are stored.

	<p>If <var>dst</var>> is not NULL, the pointer pointed to by <var>src</var> is updated to point
	to the character after the one that conversion stopped at. If conversion
	stops because a null character is encountered, *<var>src</var> is set to NULL.

	<p>The mbstate_t argument, <var>ps</var>, is used to keep track of the shift state. If
	it is NULL, <code>wcsrtombs</code> uses an internal, static mbstate_t object, which
	is initialized to the initial conversion state at program startup.

	<p>The <code>wcsnrtombs</code> function behaves identically to <code>wcsrtombs</code>, except that
	conversion stops after reading at most <var>nwc</var> characters from the buffer
	pointed to by <var>src</var>.

	<p><br>
	<strong>Returns</strong><br>
	The <code>wcsrtombs</code> and <code>wcsnrtombs</code> functions return the number of bytes
	stored in the array pointed to by <var>dst</var> (not including any terminating
	null), if successful, otherwise it returns (size_t)-1.

	<p><br>
	<strong>Portability</strong><br>
	<code>wcsrtombs</code> is defined by C99 standard.
	<code>wcsnrtombs</code> is defined by the POSIX.1-2008 standard.

	<p><br>

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