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| <h3 class="section">4.22 <code>fputwc</code>, <code>putwc</code>—write a wide character on a stream or file</h3> |
| |
| <p><a name="index-fputwc-188"></a><a name="index-g_t_005ffputwc_005fr-189"></a><a name="index-putwc-190"></a><a name="index-g_t_005fputwc_005fr-191"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <stdio.h> |
| #include <wchar.h> |
| wint_t fputwc(wchar_t <var>wc</var>, FILE *<var>fp</var>); |
| |
| #include <stdio.h> |
| #include <wchar.h> |
| wint_t _fputwc_r(struct _reent *<var>ptr</var>, wchar_t <var>wc</var>, FILE *<var>fp</var>); |
| |
| #include <stdio.h> |
| #include <wchar.h> |
| wint_t putwc(wchar_t <var>wc</var>, FILE *<var>fp</var>); |
| |
| #include <stdio.h> |
| #include <wchar.h> |
| wint_t _putwc_r(struct _reent *<var>ptr</var>, wchar_t <var>wc</var>, FILE *<var>fp</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>fputwc</code> writes the wide character argument <var>wc</var> to the file or |
| stream identified by <var>fp</var>. |
| |
| <p>If the file was opened with append mode (or if the stream cannot |
| support positioning), then the new wide character goes at the end of the |
| file or stream. Otherwise, the new wide character is written at the |
| current value of the position indicator, and the position indicator |
| oadvances by one. |
| |
| <p>The <code>putwc</code> function or macro functions identically to <code>fputwc</code>. It |
| may be implemented as a macro, and may evaluate its argument more than |
| once. There is no reason ever to use it. |
| |
| <p>The <code>_fputwc_r</code> and <code>_putwc_r</code> functions are simply reentrant versions |
| of <code>fputwc</code> and <code>putwc</code> that take an additional reentrant structure |
| argument: <var>ptr</var>. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| If successful, <code>fputwc</code> and <code>putwc</code> return their argument <var>wc</var>. |
| If an error intervenes, the result is <code>EOF</code>. You can use |
| `<code>ferror(</code><var>fp</var><code>)</code>' to query for errors. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| C99, POSIX.1-2001 |
| |
| <p><br> |
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