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| <h3 class="section">4.72 <code>viprintf</code>, <code>vfiprintf</code>, <code>vsiprintf</code>, <code>vsniprintf</code>, <code>vasiprintf</code>, <code>vasniprintf</code>—format argument list (integer only)</h3> |
| |
| <p><a name="index-viprintf-355"></a><a name="index-g_t_005fviprintf_005fr-356"></a><a name="index-vfiprintf-357"></a><a name="index-g_t_005fvfiprintf_005fr-358"></a><a name="index-vsiprintf-359"></a><a name="index-g_t_005fvsiprintf_005fr-360"></a><a name="index-vsniprintf-361"></a><a name="index-g_t_005fvsniprintf_005fr-362"></a><a name="index-vasiprintf-363"></a><a name="index-g_t_005fvasiprintf_005fr-364"></a><a name="index-vasniprintf-365"></a><a name="index-g_t_005fvasniprintf_005fr-366"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <stdio.h> |
| #include <stdarg.h> |
| int viprintf(const char *<var>fmt</var>, va_list <var>list</var>); |
| int vfiprintf(FILE *<var>fp</var>, const char *<var>fmt</var>, va_list <var>list</var>); |
| int vsiprintf(char *<var>str</var>, const char *<var>fmt</var>, va_list <var>list</var>); |
| int vsniprintf(char *<var>str</var>, size_t <var>size</var>, const char *<var>fmt</var>, |
| va_list <var>list</var>); |
| int vasiprintf(char **<var>strp</var>, const char *<var>fmt</var>, va_list <var>list</var>); |
| char *vasniprintf(char *<var>str</var>, size_t *<var>size</var>, const char *<var>fmt</var>, |
| va_list <var>list</var>); |
| |
| int _viprintf_r(struct _reent *<var>reent</var>, const char *<var>fmt</var>, |
| va_list <var>list</var>); |
| int _vfiprintf_r(struct _reent *<var>reent</var>, FILE *<var>fp</var>, |
| const char *<var>fmt</var>, va_list <var>list</var>); |
| int _vsiprintf_r(struct _reent *<var>reent</var>, char *<var>str</var>, |
| const char *<var>fmt</var>, va_list <var>list</var>); |
| int _vsniprintf_r(struct _reent *<var>reent</var>, char *<var>str</var>, |
| size_t <var>size</var>, const char *<var>fmt</var>, va_list <var>list</var>); |
| int _vasiprintf_r(struct _reent *<var>reent</var>, char **<var>str</var>, |
| const char *<var>fmt</var>, va_list <var>list</var>); |
| char *_vasniprintf_r(struct _reent *<var>reent</var>, char *<var>str</var>, |
| size_t *<var>size</var>, const char *<var>fmt</var>, va_list <var>list</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>viprintf</code>, <code>vfiprintf</code>, <code>vasiprintf</code>, <code>vsiprintf</code>, |
| <code>vsniprintf</code>, and <code>vasniprintf</code> are (respectively) variants of |
| <code>iprintf</code>, <code>fiprintf</code>, <code>asiprintf</code>, <code>siprintf</code>, <code>sniprintf</code>, |
| and <code>asniprintf</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>_viprintf_r</code>, <code>_vfiprintf_r</code>, <code>_vasiprintf_r</code>, |
| <code>_vsiprintf_r</code>, <code>_vsniprintf_r</code>, and <code>_vasniprintf_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> |
| All of these functions are newlib 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>. |
| |
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