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Next: <a href="sprintf.html#sprintf" accesskey="n" rel="next">sprintf</a>, Previous: <a href="siprintf.html#siprintf" accesskey="p" rel="prev">siprintf</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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<a name="siscanf_002c-fiscanf_002c-iscanf_002d_002d_002dscan-and-format-non_002dfloating-input"></a>
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<h3 class="section">4.60 <code>siscanf</code>, <code>fiscanf</code>, <code>iscanf</code>—scan and format non-floating input</h3>
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<a name="index-iscanf"></a>
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<a name="index-_005fiscanf_005fr"></a>
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<a name="index-_005ffiscanf_005fr"></a>
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<a name="index-siscanf"></a>
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<a name="index-_005fsiscanf_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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int iscanf(const char *<var>format</var>, ...);
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int fiscanf(FILE *<var>fd</var>, const char *<var>format</var>, ...);
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int siscanf(const char *<var>str</var>, const char *<var>format</var>, ...);
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int _iscanf_r(struct _reent *<var>ptr</var>, const char *<var>format</var>, ...);
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int _fiscanf_r(struct _reent *<var>ptr</var>, FILE *<var>fd</var>,
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const char *<var>format</var>, ...);
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int _siscanf_r(struct _reent *<var>ptr</var>, const char *<var>str</var>,
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const char *<var>format</var>, ...);
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</pre></div>
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<p><strong>Description</strong><br>
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<code>iscanf</code>, <code>fiscanf</code>, and <code>siscanf</code> are the same as
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<code>scanf</code>, <code>fscanf</code>, and <code>sscanf</code> respectively, only that
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they restrict the available formats to non-floating-point
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format specifiers.
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</p>
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<p>The routines <code>_iscanf_r</code>, <code>_fiscanf_r</code>, and <code>_siscanf_r</code> are reentrant
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versions of <code>iscanf</code>, <code>fiscanf</code>, and <code>siscanf</code> that take an additional
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first argument pointing to a reentrancy structure.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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<code>iscanf</code> returns the number of input fields successfully
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scanned, converted and stored; the return value does
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not include scanned fields which were not stored.
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</p>
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<p>If <code>iscanf</code> attempts to read at end-of-file, the return
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value is <code>EOF</code>.
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</p>
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<p>If no fields were stored, the return value is <code>0</code>.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>iscanf</code>, <code>fiscanf</code>, and <code>siscanf</code> are newlib 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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