Drizzled Public API Documentation

ascii.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 of the License.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #include <config.h>
21 
22 #include <drizzled/plugin.h>
23 #include <drizzled/function/math/int.h>
24 #include <drizzled/plugin/function.h>
25 
26 using namespace std;
27 using namespace drizzled;
28 
30 {
31  String value;
32 public:
33  int64_t val_int();
35 
36  const char *func_name() const
37  {
38  return "ascii";
39  }
40 
41  void fix_length_and_dec()
42  {
43  max_length= 3;
44  }
45 
47  {
48  return (n == 1);
49  }
50 };
51 
52 
54 {
55  assert(fixed == true);
56  String *res= args[0]->val_str(&value);
57 
58  if (res == NULL)
59  {
60  null_value= true;
61  return 0;
62  }
63 
64  null_value= false;
65  return (int64_t) ( res->length() != 0 ?
66  (unsigned char) (*res)[0] :
67  (unsigned char) 0
68  );
69 }
70 
71 plugin::Create_function<AsciiFunction> *asciiudf= NULL;
72 
73 static int initialize(module::Context &context)
74 {
75  asciiudf= new plugin::Create_function<AsciiFunction>("ascii");
76  context.add(asciiudf);
77  return 0;
78 }
79 
80 DRIZZLE_DECLARE_PLUGIN
81 {
82  DRIZZLE_VERSION_ID,
83  "ascii",
84  "1.0",
85  "Devananda van der Veen",
86  N_("ASCII function"),
87  PLUGIN_LICENSE_GPL,
88  initialize,
89  NULL,
90  NULL
91 }
92 DRIZZLE_DECLARE_PLUGIN_END;
TODO: Rename this file - func.h is stupid.
int64_t val_int()
Definition: ascii.cc:53
bool check_argument_count(int n)
Definition: ascii.cc:46