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| <h3 class="section">4.71 <code>vfwscanf</code>, <code>vwscanf</code>, <code>vswscanf</code>—scan and format argument list from wide character input</h3> |
| |
| <p><a name="index-vfwscanf-349"></a><a name="index-g_t_005fvfwscanf-350"></a><a name="index-vwscanf-351"></a><a name="index-g_t_005fvwscanf-352"></a><a name="index-vswscanf-353"></a><a name="index-g_t_005fvswscanf-354"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <stdio.h> |
| #include <stdarg.h> |
| int vwscanf(const wchar_t *<var>fmt</var>, va_list <var>list</var>); |
| int vfwscanf(FILE *<var>fp</var>, const wchar_t *<var>fmt</var>, va_list <var>list</var>); |
| int vswscanf(const wchar_t *<var>str</var>, const wchar_t *<var>fmt</var>, va_list <var>list</var>); |
| |
| int _vwscanf(struct _reent *<var>reent</var>, const wchar_t *<var>fmt</var>, |
| va_list <var>list</var>); |
| int _vfwscanf(struct _reent *<var>reent</var>, FILE *<var>fp</var>, const wchar_t *<var>fmt</var>, |
| va_list <var>list</var>); |
| int _vswscanf(struct _reent *<var>reent</var>, const wchar_t *<var>str</var>, |
| const wchar_t *<var>fmt</var>, va_list <var>list</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>vwscanf</code>, <code>vfwscanf</code>, and <code>vswscanf</code> are (respectively) variants |
| of <code>wscanf</code>, <code>fwscanf</code>, and <code>swscanf</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. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| The return values are consistent with the corresponding functions: |
| <code>vwscanf</code> returns the number of input fields successfully scanned, |
| converted, and stored; the return value does not include scanned |
| fields which were not stored. |
| |
| <p>If <code>vwscanf</code> attempts to read at end-of-file, the return value |
| is <code>EOF</code>. |
| |
| <p>If no fields were stored, the return value is <code>0</code>. |
| |
| <p>The routines <code>_vwscanf</code>, <code>_vfwscanf</code>, and <code>_vswscanf</code> are |
| reentrant versions which take an additional first parameter which points |
| to the reentrancy structure. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| C99, POSIX-1.2008 |
| |
| <p><br> |
| |
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