Drizzled Public API Documentation

bin_string.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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18  */
19 
20 #include <config.h>
21 #include <drizzled/item/bin_string.h>
22 
23 namespace drizzled {
24 
25 /*
26  bin item.
27  In string context this is a binary string.
28  In number context this is a int64_t value.
29 */
30 
31 Item_bin_string::Item_bin_string(str_ref arg)
32 {
33  const char *str= arg.data();
34  const char *end= str + arg.size() - 1;
35  unsigned char bits= 0;
36  uint32_t power= 1;
37 
38  max_length= (arg.size() + 7) >> 3;
39  char *ptr= (char*) memory::sql_alloc(max_length + 1);
40  str_value.set(ptr, max_length, &my_charset_bin);
41  ptr+= max_length - 1;
42  ptr[1]= 0; // Set end null for string
43  for (; end >= str; end--)
44  {
45  if (power == 256)
46  {
47  power= 1;
48  *ptr--= bits;
49  bits= 0;
50  }
51  if (*end == '1')
52  bits|= power;
53  power<<= 1;
54  }
55  *ptr= (char) bits;
56  collation.set(&my_charset_bin, DERIVATION_COERCIBLE);
57  fixed= 1;
58 }
59 
60 } /* namespace drizzled */
bool fixed
Definition: item.h:120
TODO: Rename this file - func.h is stupid.
String str_value
Definition: item.h:107