Drizzled Public API Documentation

functions.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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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 
22 #include <drizzled/function/bit/functions.h>
23 
24 namespace drizzled
25 {
26 
27 namespace function
28 {
29 
30 namespace bit
31 {
32 
34 {
35  assert(fixed == 1);
36  uint32_t shift;
37  uint64_t res= ((uint64_t) args[0]->val_int() <<
38  (shift=(uint) args[1]->val_int()));
39  if (args[0]->null_value || args[1]->null_value)
40  {
41  null_value=1;
42  return 0;
43  }
44  null_value=0;
45 
46  return (shift < sizeof(int64_t)*8 ? (int64_t) res : 0LL);
47 }
48 
50 {
51  assert(fixed == 1);
52  uint32_t shift;
53  uint64_t res= (uint64_t) args[0]->val_int() >>
54  (shift=(uint) args[1]->val_int());
55 
56  if (args[0]->null_value || args[1]->null_value)
57  {
58  null_value=1;
59  return 0;
60  }
61  null_value=0;
62 
63  return (shift < sizeof(int64_t)*8 ? (int64_t) res : 0LL);
64 }
65 
66 
67 int64_t Neg::val_int()
68 {
69  assert(fixed == 1);
70  uint64_t res= (uint64_t) args[0]->val_int();
71 
72  if ((null_value=args[0]->null_value))
73  return 0;
74 
75  return ~res;
76 }
77 
78 
79 int64_t Xor::val_int()
80 {
81  assert(fixed == 1);
82  uint64_t arg1= (uint64_t) args[0]->val_int();
83  uint64_t arg2= (uint64_t) args[1]->val_int();
84 
85  if ((null_value= (args[0]->null_value || args[1]->null_value)))
86  return 0;
87 
88  return (int64_t) (arg1 ^ arg2);
89 }
90 
91 int64_t Or::val_int()
92 {
93  assert(fixed == 1);
94 
95  uint64_t arg1= (uint64_t) args[0]->val_int();
96  if (args[0]->null_value)
97  {
98  null_value=1; /* purecov: inspected */
99  return 0; /* purecov: inspected */
100  }
101 
102  uint64_t arg2= (uint64_t) args[1]->val_int();
103  if (args[1]->null_value)
104  {
105  null_value=1;
106  return 0;
107  }
108  null_value=0;
109 
110  return (int64_t) (arg1 | arg2);
111 }
112 
113 int64_t And::val_int()
114 {
115  assert(fixed == 1);
116 
117  uint64_t arg1= (uint64_t) args[0]->val_int();
118 
119  if (args[0]->null_value)
120  {
121  null_value=1; /* purecov: inspected */
122  return 0; /* purecov: inspected */
123  }
124 
125  uint64_t arg2= (uint64_t) args[1]->val_int();
126 
127  if (args[1]->null_value)
128  {
129  null_value=1; /* purecov: inspected */
130  return 0; /* purecov: inspected */
131  }
132  null_value=0;
133 
134  return (int64_t) (arg1 & arg2);
135 }
136 
137 } /* namespace bit */
138 } /* namespace function */
139 } // namespace drizzled
bool fixed
Definition: item.h:120
bool null_value
Definition: item.h:122