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| <h3 class="section">4.40 <code>getwchar</code>—read a wide character from standard input</h3> |
| |
| <p><a name="index-getwchar-228"></a><a name="index-g_t_005fgetwchar_005fr-229"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <wchar.h> |
| wint_t getwchar(void); |
| |
| wint_t _getwchar_r(struct _reent *<var>reent</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>getwchar</code> function or macro is the wide character equivalent of |
| the <code>getchar</code> function. You can use <code>getwchar</code> to get the next |
| wide character from the standard input stream. As a side effect, |
| <code>getwchar</code> advances the standard input's current position indicator. |
| |
| <p>The alternate function <code>_getwchar_r</code> is a reentrant version. The |
| extra argument <var>reent</var> is a pointer to a reentrancy structure. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| The next wide character cast to <code>wint_t</code>, unless there is no more |
| data, or the host system reports a read error; in either of these |
| situations, <code>getwchar</code> returns <code>WEOF</code>. |
| |
| <p>You can distinguish the two situations that cause an <code>WEOF</code> result by |
| using `<code>ferror(stdin)</code>' and `<code>feof(stdin)</code>'. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| C99 |
| |
| <p><br> |
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