Drizzled Public API Documentation

charlength.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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4  * Copyright (C) 2008 Sun Microsystems, Inc.
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19 
20 #include <config.h>
21 
22 #include <drizzled/function/math/int.h>
23 #include <drizzled/plugin.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 "char_length";
39  }
40 
41  void fix_length_and_dec()
42  {
43  max_length= 10;
44  }
45 
46  bool check_argument_count(int n)
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->numchars();
66 }
67 
68 plugin::Create_function<CharLengthFunction> *charlengthudf= NULL;
69 plugin::Create_function<CharLengthFunction> *characterlengthudf= NULL;
70 
71 static int initialize(drizzled::module::Context &context)
72 {
73  charlengthudf= new plugin::Create_function<CharLengthFunction>("char_length");
74  characterlengthudf= new plugin::Create_function<CharLengthFunction>("character_length");
75  context.add(charlengthudf);
76  context.add(characterlengthudf);
77  return 0;
78 }
79 
80 DRIZZLE_DECLARE_PLUGIN
81 {
82  DRIZZLE_VERSION_ID,
83  "charlength",
84  "1.0",
85  "Devananda van der Veen",
86  N_("CHAR_LENGTH and CHARACTER_LENGTH functions"),
87  PLUGIN_LICENSE_GPL,
88  initialize,
89  NULL,
90  NULL
91 }
92 DRIZZLE_DECLARE_PLUGIN_END;