ex14_8c-example.html

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<hr><h1>ex14.c</h1> Example for loading a file into a blob column.
<p>
<div class="fragment"><pre><span class="comment">/* $Id: ex14_8c-example.html,v 1.1 2005/01/13 02:56:43 cvsroot Exp $ */</span>
<span class="preprocessor">#include &lt;stdio.h&gt;</span>
<span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<span class="preprocessor">#include "examples.h"</span>

<span class="keywordtype">int</span> insert_file_into_blob_table(<a class="code" href="group__typedefs.html#a0">sqlo_db_handle_t</a> dbh, <span class="keywordtype">int</span> key, <span class="keyword">const</span> <span class="keywordtype">char</span> * fname )
{

  <span class="keywordtype">char</span> * stmt = 
    <span class="stringliteral">"INSERT INTO T_SQLORA_BLOB (KEY, BDATA) "</span>
    <span class="stringliteral">"VALUES (:b1, EMPTY_BLOB()) RETURNING BDATA INTO :b2"</span>;
  <a class="code" href="group__typedefs.html#a2">sqlo_lob_desc_t</a> loblp;                  <span class="comment">/* the lob locator */</span>
  <a class="code" href="group__typedefs.html#a1">sqlo_stmt_handle_t</a> sth;
  <span class="keywordtype">int</span> status;
  FILE * fp;
  <span class="keywordtype">unsigned</span> filelen;
  <span class="keywordtype">short</span> ind;
  <span class="keywordtype">int</span> k = key;

  create_blob_table(dbh);

  <span class="keywordflow">if</span> (! (fp = fopen(fname, <span class="stringliteral">"r"</span>))) {
    printf(<span class="stringliteral">"ERROR: cannot open file %s\n"</span>, fname);
    <span class="keywordflow">return</span> 0;
  }

  <span class="comment">/* determine file len */</span>
  fseek(fp, 0, SEEK_END);
  filelen = ftell(fp);
  fseek(fp, 0, 0);

  <span class="comment">/* parse */</span>
  <span class="keywordflow">if</span> (0&gt;(sth = <a name="a0"></a><a class="code" href="group__complex.html#a0">sqlo_prepare</a>(dbh, stmt)))
    error_exit(dbh, <span class="stringliteral">"sqlo_prepare"</span>);

  <span class="comment">/* allocate the lob locator */</span>
  <span class="keywordflow">if</span> (0 &gt; <a name="a1"></a><a class="code" href="group__lob.html#a0">sqlo_alloc_lob_desc</a>(dbh, &amp;loblp))
    error_exit(dbh, <span class="stringliteral">"sqlo_alloc_lob_desc"</span>);

  <span class="comment">/* bind input variables */</span>
  <span class="keywordflow">if</span> (<a class="code" href="group__constants.html#a3a25">SQLO_SUCCESS</a> != 
      (<a name="a2"></a><a class="code" href="group__complex.html#a3">sqlo_bind_by_pos</a>(sth, 1, <a class="code" href="group__constants.html#a6a56">SQLOT_INT</a>, &amp;k, <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>), NULL, 0)) ||
      (<a class="code" href="group__complex.html#a3">sqlo_bind_by_pos</a>(sth, 2, <a class="code" href="group__constants.html#a6a82">SQLOT_BLOB</a>, &amp;loblp, 0, &amp;ind, 0))
      ) {
    <a name="a3"></a><a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &amp;loblp);
    error_exit(dbh, <span class="stringliteral">"sqlo_bind_by_pos"</span>);
  }

  <span class="comment">/* execute */</span>
  status = <a name="a4"></a><a class="code" href="group__complex.html#a8">sqlo_execute</a>(sth, 1);

  <span class="keywordflow">if</span> (<a class="code" href="group__constants.html#a3a25">SQLO_SUCCESS</a> != status) {
    <a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &amp;loblp);
    error_exit(dbh, <span class="stringliteral">"sqlo_execute"</span>);
  }

  <span class="comment">/* write the lob */</span>
  status = <a name="a5"></a><a class="code" href="group__lob.html#a4">sqlo_lob_write_stream</a>(dbh, loblp, filelen, fp);

  <span class="keywordflow">if</span> (status &lt; 0) {
    <a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &amp;loblp);
    error_exit(dbh, <span class="stringliteral">"sqlo_lob_write_stream"</span>);
  }

  <a name="a6"></a><a class="code" href="group__easy.html#a13">sqlo_close</a>(sth);
  <a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &amp;loblp);
  fclose(fp);

  <span class="keywordflow">return</span> (1);
}


<span class="comment">/* $Id */</span>
</pre></div><hr><address style="align: right;"><small>Generated on Thu Aug 14 18:02:53 2003 for libsqlora8 by
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