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| <h3 class="section">4.70 <code>vfwprintf</code>, <code>vwprintf</code>, <code>vswprintf</code>—wide character format argument list</h3> |
| |
| <p><a name="index-vfwprintf-343"></a><a name="index-g_t_005fvfwprintf_005fr-344"></a><a name="index-vwprintf-345"></a><a name="index-g_t_005fvwprintf_005fr-346"></a><a name="index-vswprintf-347"></a><a name="index-g_t_005fvswprintf_005fr-348"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <stdio.h> |
| #include <stdarg.h> |
| #include <wchar.h> |
| int vwprintf(const wchar_t *<var>fmt</var>, va_list <var>list</var>); |
| int vfwprintf(FILE *<var>fp</var>, const wchar_t *<var>fmt</var>, va_list <var>list</var>); |
| int vswprintf(wchar_t *<var>str</var>, size_t <var>size</var>, const wchar_t *<var>fmt</var>, |
| va_list <var>list</var>); |
| |
| int _vwprintf_r(struct _reent *<var>reent</var>, const wchar_t *<var>fmt</var>, |
| va_list <var>list</var>); |
| int _vfwprintf_r(struct _reent *<var>reent</var>, FILE *<var>fp</var>, |
| const wchar_t *<var>fmt</var>, va_list <var>list</var>); |
| int _vswprintf_r(struct _reent *<var>reent</var>, wchar_t *<var>str</var>, |
| size_t <var>size</var>, const wchar_t *<var>fmt</var>, va_list <var>list</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>vwprintf</code>, <code>vfwprintf</code> and <code>vswprintf</code> are (respectively) variants |
| of <code>wprintf</code>, <code>fwprintf</code> and <code>swprintf</code>. They differ only in allowing |
| their caller to pass the variable argument list as a <code>va_list</code> object |
| (initialized by <code>va_start</code>) rather than directly accepting a variable |
| number of arguments. The caller is responsible for calling <code>va_end</code>. |
| |
| <p><code>_vwprintf_r</code>, <code>_vfwprintf_r</code> and <code>_vswprintf_r</code> are reentrant |
| versions of the above. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| The return values are consistent with the corresponding functions. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| POSIX-1.2008 with extensions; C99 (compliant except for POSIX extensions). |
| |
| <p>Supporting OS subroutines required: <code>close</code>, <code>fstat</code>, <code>isatty</code>, |
| <code>lseek</code>, <code>read</code>, <code>sbrk</code>, <code>write</code>. |
| |
| <p><br> |
| <strong>See Also</strong><br> |
| <code>wprintf</code>, <code>fwprintf</code> and <code>swprintf</code>. |
| |
| <p><br> |
| |
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