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130 lines
5.7 KiB
HTML
130 lines
5.7 KiB
HTML
4 years ago
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<title>wcsrtombs (The Red Hat newlib C Library)</title>
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<body lang="en">
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<a name="wcsrtombs"></a>
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<div class="header">
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<p>
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Next: <a href="wcstod.html#wcstod" accesskey="n" rel="next">wcstod</a>, Previous: <a href="strtoull.html#strtoull" accesskey="p" rel="prev">strtoull</a>, Up: <a href="Stdlib.html#Stdlib" accesskey="u" rel="up">Stdlib</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="wcsrtombs_002c-wcsnrtombs_002d_002d_002dconvert-a-wide_002dcharacter-string-to-a-character-string"></a>
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<h3 class="section">2.42 <code>wcsrtombs</code>, <code>wcsnrtombs</code>—convert a wide-character string to a character string</h3>
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<a name="index-wcsrtombs"></a>
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<a name="index-_005fwcsrtombs_005fr"></a>
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<a name="index-wcsnrtombs"></a>
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<a name="index-_005fwcsnrtombs_005fr"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <wchar.h>
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size_t wcsrtombs(char *__restrict <var>dst</var>,
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const wchar_t **__restrict <var>src</var>, size_t <var>len</var>,
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mbstate_t *__restrict <var>ps</var>);
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#include <wchar.h>
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size_t _wcsrtombs_r(struct _reent *<var>ptr</var>, char *<var>dst</var>,
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const wchar_t **<var>src</var>, size_t <var>len</var>,
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mbstate_t *<var>ps</var>);
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#include <wchar.h>
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size_t wcsnrtombs(char *__restrict <var>dst</var>,
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const wchar_t **__restrict <var>src</var>,
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size_t <var>nwc</var>, size_t <var>len</var>,
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mbstate_t *__restrict <var>ps</var>);
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#include <wchar.h>
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size_t _wcsnrtombs_r(struct _reent *<var>ptr</var>, char *<var>dst</var>,
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const wchar_t **<var>src</var>, size_t <var>nwc</var>,
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size_t <var>len</var>, mbstate_t *<var>ps</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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The <code>wcsrtombs</code> function converts a string of wide characters indirectly
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pointed to by <var>src</var> to a corresponding multibyte character string stored in
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the array pointed to by <var>dst</var>. No more than <var>len</var> bytes are written to
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<var>dst</var>.
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</p>
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<p>If <var>dst</var> is NULL, no characters are stored.
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</p>
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<p>If <var>dst</var> is not NULL, the pointer pointed to by <var>src</var> is updated to point
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to the character after the one that conversion stopped at. If conversion
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stops because a null character is encountered, *<var>src</var> is set to NULL.
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</p>
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<p>The mbstate_t argument, <var>ps</var>, is used to keep track of the shift state. If
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it is NULL, <code>wcsrtombs</code> uses an internal, static mbstate_t object, which
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is initialized to the initial conversion state at program startup.
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</p>
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<p>The <code>wcsnrtombs</code> function behaves identically to <code>wcsrtombs</code>, except that
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conversion stops after reading at most <var>nwc</var> characters from the buffer
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pointed to by <var>src</var>.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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The <code>wcsrtombs</code> and <code>wcsnrtombs</code> functions return the number of bytes
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stored in the array pointed to by <var>dst</var> (not including any terminating
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null), if successful, otherwise it returns (size_t)-1.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>wcsrtombs</code> is defined by C99 standard.
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<code>wcsnrtombs</code> is defined by the POSIX.1-2008 standard.
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</p>
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<br>
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<hr>
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<div class="header">
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<p>
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Next: <a href="wcstod.html#wcstod" accesskey="n" rel="next">wcstod</a>, Previous: <a href="strtoull.html#strtoull" accesskey="p" rel="prev">strtoull</a>, Up: <a href="Stdlib.html#Stdlib" accesskey="u" rel="up">Stdlib</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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