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<title>XQilla XQC API Documentation</title>
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<div class="header">
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<h1>xqc-basic.c</h1> </div>
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<div class="contents">
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<p>This example executes a simple XQuery expression ("1 to 100"), which returns the numbers from 1 to 100 inclusive.</p>
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<div class="fragment"><pre class="fragment"><span class="preprocessor">#include &lt;<a class="code" href="xqilla-xqc_8h.html">xqilla/xqilla-xqc.h</a>&gt;</span>
<span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])
{
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<a name="_a0"></a><a class="code" href="structXQC__Implementation__s.html" title="The XQC_Implementation struct provides factory functions for preparing queries.">XQC_Implementation</a> *impl;
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<a name="_a1"></a><a class="code" href="structXQC__Expression__s.html" title="The XQC_Expression struct represents a prepared query, and allows the user to execute that query any ...">XQC_Expression</a> *expr;
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<a name="_a2"></a><a class="code" href="structXQC__Sequence__s.html">XQC_Sequence</a> *seq;
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<a class="code" href="xqc_8h.html#aeb1ad206e9c38a7f84749cafe04d7a3f" title="The error enumeration used by all XQC functions to designate error condition.">XQC_Error</a> err;
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<span class="keyword">const</span> <span class="keywordtype">char</span> *value;
<span class="comment">// XQilla specific way to create an XQC_Implementation struct</span>
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impl = <a name="a3"></a><a class="code" href="xqilla-xqc_8h.html#acd9659e93bbfafcd0cac9d7c4c12e13c" title="Creates an XQC_Implementation object that uses XQilla.">createXQillaXQCImplementation</a>(<a name="a4"></a><a class="code" href="xqc_8h.html#a8fbc00dfcf0a3527e0ccba36322e1c84" title="The version of the XQC API in this header file.">XQC_VERSION_NUMBER</a>);
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<span class="keywordflow">if</span>(impl == 0) <span class="keywordflow">return</span> 1;
<span class="comment">// Prepare an XQuery expression</span>
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err = impl-&gt;<a name="a5"></a><a class="code" href="structXQC__Implementation__s.html#a4f82aa0b0e5c675f95f6c78b3bf76216" title="Prepares a query from a UTF-8 string, returning an XQC_Expression object.">prepare</a>(impl, <span class="stringliteral">&quot;1 to 100&quot;</span>, 0, &amp;expr);
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<span class="keywordflow">if</span>(err != 0) <span class="keywordflow">goto</span> free_impl;
<span class="comment">// Execute the query</span>
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err = expr-&gt;<a name="a6"></a><a class="code" href="structXQC__Expression__s.html#a3181579fa2677d43c29efd31a649726c" title="Executes the query represented by the XQC_Expression object using the values in the XQC_DynamicContex...">execute</a>(expr, 0, &amp;seq);
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<span class="keywordflow">if</span>(err != 0) <span class="keywordflow">goto</span> free_expr;
<span class="comment">// Iterate over the results, printing them</span>
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<span class="keywordflow">while</span>((err = seq-&gt;<a name="a7"></a><a class="code" href="structXQC__Sequence__s.html#ab84594b06f7e69fd870c41f55ae5c6c6" title="Moves the XQC_Sequence so that the current item is positioned at the next item in the sequence...">next</a>(seq)) == <a name="a8"></a><a class="code" href="xqc_8h.html#aeb1ad206e9c38a7f84749cafe04d7a3fa975a11c6557d4d849e48f4034380a375" title="No error.">XQC_NO_ERROR</a>) {
seq-&gt;<a name="a9"></a><a class="code" href="structXQC__Sequence__s.html#a3bd3b6dab0c68652af816438407dd037" title="Returns the string value of the current item in the sequence - this is equivalent to calling fn:strin...">string_value</a>(seq, &amp;value);
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printf(<span class="stringliteral">&quot;%s\n&quot;</span>, value);
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}
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<span class="keywordflow">if</span>(err == <a name="a10"></a><a class="code" href="xqc_8h.html#aeb1ad206e9c38a7f84749cafe04d7a3fadfd1d8eea45c90655b98cfd728bfee2e" title="The end of the XQC_Sequence has been reached.">XQC_END_OF_SEQUENCE</a>)
err = <a class="code" href="xqc_8h.html#aeb1ad206e9c38a7f84749cafe04d7a3fa975a11c6557d4d849e48f4034380a375" title="No error.">XQC_NO_ERROR</a>;
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<span class="comment">// free everything</span>
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seq-&gt;<a name="a11"></a><a class="code" href="structXQC__Sequence__s.html#a13ab651edb4e0754cb8a032e2bce50b0" title="Called to free the resources associated with the XQC_Sequence.">free</a>(seq);
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free_expr:
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expr-&gt;<a name="a12"></a><a class="code" href="structXQC__Expression__s.html#a6aa28a94f0ff6732c26f131bbe4d44a9" title="Called to free the resources associated with the XQC_Expression.">free</a>(expr);
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free_impl:
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impl-&gt;<a name="a13"></a><a class="code" href="structXQC__Implementation__s.html#afb636b6cbd236831652a518d9e71418d" title="Called to free the resources associated with the XQC_Implementation.">free</a>(impl);
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<span class="keywordflow">return</span> err;
}
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</pre></div> </div>
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<hr class="footer"/><address class="footer"><small>Generated on Mon Oct 31 2011 19:08:38 for XQilla XQC API by&#160;
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