Drizzled Public API Documentation

uncompressed_length.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
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6  * This program is free software; you can redistribute it and/or modify
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8  * the Free Software Foundation; version 2 of the License.
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13  * GNU General Public License for more details.
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17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #include <config.h>
21 #include <drizzled/plugin/function.h>
22 #include <drizzled/function/math/int.h>
23 #include <plugin/compression/uncompressed_length.h>
24 
25 #include <string>
26 
27 using namespace std;
28 using namespace drizzled;
29 
30 
32 {
33  assert(fixed == 1);
34  String *res= args[0]->val_str(&value);
35  if (!res)
36  {
37  null_value=1;
38  return 0;
39  }
40  null_value=0;
41  if (res->empty()) return 0;
42 
43  /*
44  res->ptr() using is safe because we have tested that string is not empty,
45  res->c_ptr() is not used because:
46  - we do not need \0 terminated string to get first 4 bytes
47  - c_ptr() tests simbol after string end (uninitialiozed memory) which
48  confuse valgrind
49  */
50  return uint4korr(res->ptr()) & 0x3FFFFFFF;
51 }
52 
TODO: Rename this file - func.h is stupid.