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| <h3 class="section">2.47 <code>wctomb</code>—minimal wide char to multibyte converter</h3> |
| |
| <p><a name="index-wctomb-109"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <stdlib.h> |
| int wctomb(char *<var>s</var>, wchar_t <var>wchar</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| When _MB_CAPABLE is not defined, this is a minimal ANSI-conforming |
| implementation of <code>wctomb</code>. The |
| only “wide characters” recognized are single bytes, |
| and they are “converted” to themselves. |
| |
| <p>When _MB_CAPABLE is defined, this routine calls <code>_wctomb_r</code> to perform |
| the conversion, passing a state variable to allow state dependent |
| decoding. The result is based on the locale setting which may |
| be restricted to a defined set of locales. |
| |
| <p>Each call to <code>wctomb</code> modifies <code>*</code><var>s</var> unless <var>s</var> is a null |
| pointer or _MB_CAPABLE is defined and <var>wchar</var> is invalid. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| This implementation of <code>wctomb</code> returns <code>0</code> if |
| <var>s</var> is <code>NULL</code>; it returns <code>-1</code> if _MB_CAPABLE is enabled |
| and the wchar is not a valid multi-byte character, it returns <code>1</code> |
| if _MB_CAPABLE is not defined or the wchar is in reality a single |
| byte character, otherwise it returns the number of bytes in the |
| multi-byte character. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| <code>wctomb</code> is required in the ANSI C standard. However, the precise |
| effects vary with the locale. |
| |
| <p><code>wctomb</code> requires no supporting OS subroutines. |
| |
| <p><br> |
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