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<a name="strxfrm_002d_002d_002dtransform-string"></a>
<h3 class="section">5.45 <code>strxfrm</code>&mdash;transform string</h3>
<a name="index-strxfrm"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;string.h&gt;
size_t strxfrm(char *restrict <var>s1</var>, const char *restrict <var>s2</var>,
    size_t <var>n</var>);

</pre></div>
<p><strong>Description</strong><br>
This function transforms the string pointed to by <var>s2</var> and
places the resulting string into the array pointed to by
<var>s1</var>. The transformation is such that if the <code>strcmp</code>
function is applied to the two transformed strings, it returns
a value greater than, equal to, or less than zero,
correspoinding to the result of a <code>strcoll</code> function applied
to the same two original strings.
</p>
<p>No more than <var>n</var> characters are placed into the resulting
array pointed to by <var>s1</var>, including the terminating null
character. If <var>n</var> is zero, <var>s1</var> may be a null pointer. If
copying takes place between objects that overlap, the behavior
is undefined.
</p>
<p>(NOT Cygwin:) The current implementation of <code>strxfrm</code> simply copies
the input and does not support any language-specific transformations.
</p>
<br>
<p><strong>Returns</strong><br>
The <code>strxfrm</code> function returns the length of the transformed string
(not including the terminating null character). If the value returned
is <var>n</var> or more, the contents of the array pointed to by
<var>s1</var> are indeterminate.
</p>
<br>
<p><strong>Portability</strong><br>
<code>strxfrm</code> is ANSI C.
</p>
<p><code>strxfrm</code> requires no supporting OS subroutines.
</p>
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