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Viewing changes to drizzled/field/decimal.h

  • Committer: Brian Aker
  • Date: 2009-01-24 09:43:35 UTC
  • Revision ID: brian@gir-3.local-20090124094335-6qdtvc35gl5fvivz
Adding in an example singe thread scheduler

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drizzled/field/decimal.h
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#ifndef DRIZZLED_FIELD_DECIMAL_H
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#define DRIZZLED_FIELD_DECIMAL_H
 
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#ifndef DRIZZLE_SERVER_FIELD_NEW_DECIMAL
 
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#define DRIZZLE_SERVER_FIELD_NEW_DECIMAL
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#include <drizzled/field/num.h>
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namespace drizzled
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{
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/* New decimal/numeric field which use fixed point arithmetic */
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class Field_decimal :public Field_num {
 
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class Field_new_decimal :public Field_num {
 
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private:
 
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  int do_save_field_metadata(unsigned char *first_byte);
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public:
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  using Field::store;
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  using Field::val_int;
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  using Field::val_str;
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  using Field::cmp;
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  using Field::unpack;
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  /* The maximum number of decimal digits can be stored */
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  uint32_t precision;
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  uint32_t bin_size;
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    So for example we need to count length from precision handling
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    CREATE TABLE ( DECIMAL(x,y))
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  */
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  Field_decimal(unsigned char *ptr_arg,
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                uint32_t len_arg,
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                unsigned char *null_ptr_arg,
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                unsigned char null_bit_arg,
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                enum utype unireg_check_arg,
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                const char *field_name_arg,
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                uint8_t dec_arg,
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                bool zero_arg,
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                bool unsigned_arg);
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  Field_decimal(uint32_t len_arg,
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                bool maybe_null_arg,
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                const char *field_name_arg,
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                uint8_t dec_arg,
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                bool unsigned_arg);
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  enum_field_types type() const { return DRIZZLE_TYPE_DECIMAL;}
 
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  Field_new_decimal(unsigned char *ptr_arg, uint32_t len_arg, unsigned char *null_ptr_arg,
 
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                    unsigned char null_bit_arg,
 
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                    enum utype unireg_check_arg, const char *field_name_arg,
 
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                    uint8_t dec_arg, bool zero_arg, bool unsigned_arg);
 
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  Field_new_decimal(uint32_t len_arg, bool maybe_null_arg,
 
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                    const char *field_name_arg, uint8_t dec_arg,
 
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                    bool unsigned_arg);
 
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  enum_field_types type() const { return DRIZZLE_TYPE_NEWDECIMAL;}
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  enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; }
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  Item_result result_type () const { return DECIMAL_RESULT; }
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  int  reset(void);
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  uint32_t size_of() const { return sizeof(*this); }
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  uint32_t pack_length() const { return (uint32_t) bin_size; }
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  uint32_t pack_length_from_metadata(uint32_t field_metadata);
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  uint32_t is_equal(CreateField *new_field);
 
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  uint32_t row_pack_length() { return pack_length(); }
 
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  int compatible_field_size(uint32_t field_metadata);
 
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  uint32_t is_equal(Create_field *new_field);
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  virtual const unsigned char *unpack(unsigned char* to, const unsigned char *from,
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                                      uint32_t param_data, bool low_byte_first);
 
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                              uint32_t param_data, bool low_byte_first);
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};
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} /* namespace drizzled */
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#endif /* DRIZZLED_FIELD_DECIMAL_H */
 
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#endif
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