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| <h3 class="section">4.59 <code>siscanf</code>, <code>fiscanf</code>, <code>iscanf</code>—scan and format non-floating input</h3> |
| |
| <p><a name="index-iscanf-279"></a><a name="index-g_t_005fiscanf_005fr-280"></a><a name="index-fiscanf-281"></a><a name="index-g_t_005ffiscanf_005fr-282"></a><a name="index-siscanf-283"></a><a name="index-g_t_005fsiscanf_005fr-284"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <stdio.h> |
| |
| int iscanf(const char *<var>format</var>, ...); |
| int fiscanf(FILE *<var>fd</var>, const char *<var>format</var>, ...); |
| int siscanf(const char *<var>str</var>, const char *<var>format</var>, ...); |
| |
| int _iscanf_r(struct _reent *<var>ptr</var>, const char *<var>format</var>, ...); |
| int _fiscanf_r(struct _reent *<var>ptr</var>, FILE *<var>fd</var>, |
| const char *<var>format</var>, ...); |
| int _siscanf_r(struct _reent *<var>ptr</var>, const char *<var>str</var>, |
| const char *<var>format</var>, ...); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>iscanf</code>, <code>fiscanf</code>, and <code>siscanf</code> are the same as |
| <code>scanf</code>, <code>fscanf</code>, and <code>sscanf</code> respectively, only that |
| they restrict the available formats to non-floating-point |
| format specifiers. |
| |
| <p>The routines <code>_iscanf_r</code>, <code>_fiscanf_r</code>, and <code>_siscanf_r</code> are reentrant |
| versions of <code>iscanf</code>, <code>fiscanf</code>, and <code>siscanf</code> that take an additional |
| first argument pointing to a reentrancy structure. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| <code>iscanf</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>iscanf</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><br> |
| <strong>Portability</strong><br> |
| <code>iscanf</code>, <code>fiscanf</code>, and <code>siscanf</code> 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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