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<title>Elektra Projekt: KDB Backends :: Internal Helper for Elektra</title>
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<h1>KDB Backends :: Internal Helper for Elektra</h1>
<p>Internal Methods for Elektra and Backends.
<a href="#_details">More...</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__internal.html#ga18471c9f740ea7988a0e757e752834e6">kdbiStrCaseCmp</a> (const char *s1, const char *s2)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__internal.html#gaba2b4284a78cad9cb3ca4cc7291caec5">kdbiRealloc</a> (void **buffer, size_t size)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__internal.html#ga758aca746b4458fd067165c5c46676be">kdbiFree</a> (void *ptr)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__internal.html#gac7b7254ccb104b362d3e730da654ea87">kdbiStrDup</a> (const char *s)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__internal.html#gaa13b38e07d4e54738b951c3e0bef2faf">kdbiStrLen</a> (const char *s)</td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Internal Methods for Elektra and Backends. </p>
<p>To use them: </p>
<div class="fragment"><pre class="fragment"><span class="preprocessor"> #include <kdbbackend.h></span>
</pre></div><p>There are some areas where libraries have to reimplement some basic functions to archive support for non-standard systems, for testing purposes or to provide a little more convenience. </p>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="ga758aca746b4458fd067165c5c46676be"></a><!-- doxytag: member="internal.c::kdbiFree" ref="ga758aca746b4458fd067165c5c46676be" args="(void *ptr)" -->
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<td class="memname">void kdbiFree </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"> <em>ptr</em></td>
<td> ) </td>
<td></td>
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<div class="memdoc">
<p>Free memory of elektra or its backends.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>ptr</em> </td><td>the pointer to free</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd>kdbiMalloc </dd></dl>
</div>
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<a class="anchor" id="gaba2b4284a78cad9cb3ca4cc7291caec5"></a><!-- doxytag: member="internal.c::kdbiRealloc" ref="gaba2b4284a78cad9cb3ca4cc7291caec5" args="(void **buffer, size_t size)" -->
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<td class="memname">int kdbiRealloc </td>
<td>(</td>
<td class="paramtype">void ** </td>
<td class="paramname"> <em>buffer</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"> <em>size</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
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<div class="memdoc">
<p>Reallocate Storage in a save way.</p>
<div class="fragment"><pre class="fragment"><span class="keywordflow">if</span> (<a class="code" href="group__internal.html#gaba2b4284a78cad9cb3ca4cc7291caec5">kdbiRealloc</a> ((<span class="keywordtype">void</span> **) & buffer, new_length) < 0) {
<span class="comment">// here comes the failure handler</span>
<span class="comment">// you can still use the old buffer</span>
<span class="preprocessor">#if DEBUG</span>
<span class="preprocessor"></span> fprintf (stderr, <span class="stringliteral">"Reallocation error\n"</span>);
<span class="preprocessor">#endif</span>
<span class="preprocessor"></span> free (buffer);
buffer = 0;
<span class="comment">// return with error</span>
}
*
</pre></div><dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>buffer</em> </td><td>is a pointer to a malloc </td></tr>
<tr><td valign="top"></td><td valign="top"><em>size</em> </td><td>is the new size for the memory </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>-1 on failure </dd>
<dd>
0 on success </dd></dl>
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<a class="anchor" id="ga18471c9f740ea7988a0e757e752834e6"></a><!-- doxytag: member="internal.c::kdbiStrCaseCmp" ref="ga18471c9f740ea7988a0e757e752834e6" args="(const char *s1, const char *s2)" -->
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<td class="memname">int kdbiStrCaseCmp </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>s1</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>s2</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
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<div class="memdoc">
<p>Compare Strings ignoring case.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>s1</em> </td><td>The first string to be compared </td></tr>
<tr><td valign="top"></td><td valign="top"><em>s2</em> </td><td>The second string to be compared</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>a negative number if s1 is less than s2 </dd>
<dd>
0 if s1 matches s2 </dd>
<dd>
a positive number if s1 is greater than s2 </dd></dl>
</div>
</div>
<a class="anchor" id="gac7b7254ccb104b362d3e730da654ea87"></a><!-- doxytag: member="internal.c::kdbiStrDup" ref="gac7b7254ccb104b362d3e730da654ea87" args="(const char *s)" -->
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<td class="memname">char* kdbiStrDup </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>s</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<p>Copy string into new allocated memory.</p>
<p>You need to free the memory yourself.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>s</em> </td><td>the null-terminated string to duplicate</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="group__internal.html#ga758aca746b4458fd067165c5c46676be">kdbiFree</a> </dd>
<dd>
<a class="el" href="group__internal.html#gaa13b38e07d4e54738b951c3e0bef2faf">kdbiStrLen</a> </dd></dl>
</div>
</div>
<a class="anchor" id="gaa13b38e07d4e54738b951c3e0bef2faf"></a><!-- doxytag: member="internal.c::kdbiStrLen" ref="gaa13b38e07d4e54738b951c3e0bef2faf" args="(const char *s)" -->
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<td class="memname">size_t kdbiStrLen </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>s</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>Calculates the length in bytes of a string.</p>
<p>This function differs from strlen() because it is Unicode and multibyte chars safe. While strlen() counts characters and ignores the final NULL, <a class="el" href="group__internal.html#gaa13b38e07d4e54738b951c3e0bef2faf">kdbiStrLen()</a> count bytes including the ending NULL.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>s</em> </td><td>the string to get the length from </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>number of bytes used by the string, including the final NULL. </dd></dl>
</div>
</div>
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