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103 lines
4.1 KiB
HTML
103 lines
4.1 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>wctomb (The Red Hat newlib C Library)</title>
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<meta name="description" content="wctomb (The Red Hat newlib C Library)">
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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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<link href="Stdlib.html#Stdlib" rel="up" title="Stdlib">
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</head>
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<body lang="en">
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<a name="wctomb"></a>
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<div class="header">
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<p>
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Previous: <a href="wcstombs.html#wcstombs" accesskey="p" rel="prev">wcstombs</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="wctomb_002d_002d_002dminimal-wide-char-to-multibyte-converter"></a>
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<h3 class="section">2.51 <code>wctomb</code>—minimal wide char to multibyte converter</h3>
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<a name="index-wctomb"></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 <stdlib.h>
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int wctomb(char *<var>s</var>, wchar_t <var>wchar</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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When _MB_CAPABLE is not defined, this is a minimal ANSI-conforming
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implementation of <code>wctomb</code>. The
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only “wide characters” recognized are single bytes,
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and they are “converted” to themselves.
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</p>
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<p>When _MB_CAPABLE is defined, this routine calls <code>_wctomb_r</code> to perform
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the conversion, passing a state variable to allow state dependent
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decoding. The result is based on the locale setting which may
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be restricted to a defined set of locales.
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</p>
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<p>Each call to <code>wctomb</code> modifies <code>*<var>s</var></code> unless <var>s</var> is a null
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pointer or _MB_CAPABLE is defined and <var>wchar</var> is invalid.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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This implementation of <code>wctomb</code> returns <code>0</code> if
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<var>s</var> is <code>NULL</code>; it returns <code>-1</code> if _MB_CAPABLE is enabled
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and the wchar is not a valid multi-byte character, it returns <code>1</code>
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if _MB_CAPABLE is not defined or the wchar is in reality a single
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byte character, otherwise it returns the number of bytes in the
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multi-byte character.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>wctomb</code> is required in the ANSI C standard. However, the precise
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effects vary with the locale.
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</p>
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<p><code>wctomb</code> requires no supporting OS subroutines.
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</p>
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<br>
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