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116 lines
4.9 KiB
HTML
116 lines
4.9 KiB
HTML
4 years ago
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<title>vfwprintf (The Red Hat newlib C Library)</title>
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<meta name="description" content="vfwprintf (The Red Hat newlib C Library)">
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Stdio.html#Stdio" rel="up" title="Stdio">
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<body lang="en">
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<a name="vfwprintf"></a>
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<div class="header">
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<p>
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Next: <a href="vfwscanf.html#vfwscanf" accesskey="n" rel="next">vfwscanf</a>, Previous: <a href="vfscanf.html#vfscanf" accesskey="p" rel="prev">vfscanf</a>, Up: <a href="Stdio.html#Stdio" accesskey="u" rel="up">Stdio</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="vfwprintf_002c-vwprintf_002c-vswprintf_002d_002d_002dwide-character-format-argument-list"></a>
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<h3 class="section">4.72 <code>vfwprintf</code>, <code>vwprintf</code>, <code>vswprintf</code>—wide character format argument list</h3>
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<a name="index-vfwprintf"></a>
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<a name="index-_005fvfwprintf_005fr"></a>
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<a name="index-vwprintf"></a>
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<a name="index-_005fvwprintf_005fr"></a>
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<a name="index-vswprintf"></a>
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<a name="index-_005fvswprintf_005fr"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <stdio.h>
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#include <stdarg.h>
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#include <wchar.h>
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int vwprintf(const wchar_t *__restrict <var>fmt</var>, va_list <var>list</var>);
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int vfwprintf(FILE *__restrict <var>fp</var>,
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const wchar_t *__restrict <var>fmt</var>, va_list <var>list</var>);
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int vswprintf(wchar_t * __restrict <var>str</var>, size_t <var>size</var>,
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const wchar_t *__ restrict <var>fmt</var>, va_list <var>list</var>);
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int _vwprintf_r(struct _reent *<var>reent</var>, const wchar_t *<var>fmt</var>,
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va_list <var>list</var>);
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int _vfwprintf_r(struct _reent *<var>reent</var>, FILE *<var>fp</var>,
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const wchar_t *<var>fmt</var>, va_list <var>list</var>);
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int _vswprintf_r(struct _reent *<var>reent</var>, wchar_t *<var>str</var>,
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size_t <var>size</var>, const wchar_t *<var>fmt</var>, va_list <var>list</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>vwprintf</code>, <code>vfwprintf</code> and <code>vswprintf</code> are (respectively) variants
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of <code>wprintf</code>, <code>fwprintf</code> and <code>swprintf</code>. They differ only in allowing
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their caller to pass the variable argument list as a <code>va_list</code> object
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(initialized by <code>va_start</code>) rather than directly accepting a variable
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number of arguments. The caller is responsible for calling <code>va_end</code>.
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</p>
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<p><code>_vwprintf_r</code>, <code>_vfwprintf_r</code> and <code>_vswprintf_r</code> are reentrant
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versions of the above.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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The return values are consistent with the corresponding functions.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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POSIX-1.2008 with extensions; C99 (compliant except for POSIX extensions).
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</p>
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<p>Supporting OS subroutines required: <code>close</code>, <code>fstat</code>, <code>isatty</code>,
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<code>lseek</code>, <code>read</code>, <code>sbrk</code>, <code>write</code>.
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</p>
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<br>
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<p><strong>See Also</strong><br>
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<code>wprintf</code>, <code>fwprintf</code> and <code>swprintf</code>.
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</p>
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<br>
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</body>
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</html>
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