Drizzled Public API Documentation

real.h
1 /* - mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2008 MySQL
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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; either version 2 of the License, or
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10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
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17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #pragma once
22 
23 #include <drizzled/field/num.h>
24 
25 namespace drizzled
26 {
27 
28 /* base class for float and double and decimal (old one) */
29 class Field_real :public Field_num {
30 public:
31  bool not_fixed;
32 
33  using Field::unpack;
34  using Field::pack;
35 
36  Field_real(unsigned char *ptr_arg, uint32_t len_arg, unsigned char *null_ptr_arg,
37  unsigned char null_bit_arg, utype unireg_check_arg,
38  const char *field_name_arg,
39  uint8_t dec_arg, bool zero_arg, bool unsigned_arg)
40  :Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg, unireg_check_arg,
41  field_name_arg, dec_arg, zero_arg, unsigned_arg),
42  not_fixed(dec_arg >= NOT_FIXED_DEC)
43  {}
44  int store_decimal(const type::Decimal *);
46  int truncate(double *nr, double max_length);
47  uint32_t max_display_length() { return field_length; }
48  uint32_t size_of() const { return sizeof(*this); }
49  virtual const unsigned char *unpack(unsigned char* to, const unsigned char *from,
50  uint32_t param_data, bool low_byte_first);
51  virtual unsigned char *pack(unsigned char* to, const unsigned char *from,
52  uint32_t max_length, bool low_byte_first);
53 };
54 
55 } /* namespace drizzled */
56