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Viewing changes to drizzled/field/varstring.h

  • Committer: Jay Pipes
  • Date: 2009-09-21 14:33:44 UTC
  • mfrom: (1126.10.26 dtrace-probes)
  • mto: This revision was merged to the branch mainline in revision 1133.
  • Revision ID: jpipes@serialcoder-20090921143344-jnarp7gcn6zmg19c
Merge fixes from Trond and Padraig on dtrace probes.

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drizzled/field/varstring.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_VARSTRING_H
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#define DRIZZLED_FIELD_VARSTRING_H
 
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#ifndef DRIZZLE_SERVER_FIELD_VARSTRING
 
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#define DRIZZLE_SERVER_FIELD_VARSTRING
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#include <drizzled/field/str.h>
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#include <string>
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namespace drizzled
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{
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class Field_varstring :public Field_str {
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public:
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  /* Store number of bytes used to store length (1 or 2) */
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  uint32_t length_bytes;
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  Field_varstring(unsigned char *ptr_arg,
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                  uint32_t len_arg,
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                  uint32_t length_bytes_arg,
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                  unsigned char *null_ptr_arg,
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                  unsigned char null_bit_arg,
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                  const char *field_name_arg,
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                  TableShare *share,
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                  const CHARSET_INFO * const cs);
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  Field_varstring(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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                  TableShare *share,
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                  const CHARSET_INFO * const cs);
 
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                  uint32_t len_arg, uint32_t length_bytes_arg,
 
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                  unsigned char *null_ptr_arg, unsigned char null_bit_arg,
 
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                  enum utype unireg_check_arg, const char *field_name_arg,
 
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                  TableShare *share, const CHARSET_INFO * const cs);
 
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  Field_varstring(uint32_t len_arg,bool maybe_null_arg,
 
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                  const char *field_name_arg,
 
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                  TableShare *share, const CHARSET_INFO * const cs);
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  enum_field_types type() const { return DRIZZLE_TYPE_VARCHAR; }
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  enum ha_base_keytype key_type() const;
 
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  uint32_t row_pack_length() { return field_length; }
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  bool zero_pack() const { return 0; }
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  int  reset(void) { memset(ptr, 0, field_length+length_bytes); return 0; }
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  uint32_t pack_length() const { return (uint32_t) field_length+length_bytes; }
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  uint32_t get_key_image(std::basic_string <unsigned char> &buff, uint32_t length);
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  void set_key_image(const unsigned char *buff,uint32_t length);
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  void sql_type(String &str) const;
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  virtual unsigned char *pack(unsigned char *to,
 
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  virtual unsigned char *pack(unsigned char *to, 
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                              const unsigned char *from,
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                              uint32_t max_length,
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                              bool low_byte_first);
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  unsigned char *pack_key(unsigned char *to, const unsigned char *from, uint32_t max_length, bool low_byte_first);
 
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  unsigned char *pack_key_from_key_image(unsigned char* to,
 
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                                         const unsigned char *from,
 
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                                         uint32_t max_length,
 
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                                         bool low_byte_first);
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  virtual const unsigned char *unpack(unsigned char* to,
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                                      const unsigned char *from,
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                                      uint32_t param_data,
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                                      bool low_byte_first);
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  const unsigned char *unpack_key(unsigned char* to, const unsigned char *from,
 
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                          uint32_t max_length, bool low_byte_first);
 
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  int pack_cmp(const unsigned char *a, const unsigned char *b, uint32_t key_length,
 
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               bool insert_or_update);
 
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  int pack_cmp(const unsigned char *b, uint32_t key_length,bool insert_or_update);
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  int cmp_binary(const unsigned char *a,const unsigned char *b, uint32_t max_length=UINT32_MAX);
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  int key_cmp(const unsigned char *,const unsigned char*);
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  int key_cmp(const unsigned char *str, uint32_t length);
 
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  uint32_t packed_col_length(const unsigned char *to, uint32_t length);
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  uint32_t max_packed_col_length(uint32_t max_length);
 
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  uint32_t data_length();
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  uint32_t used_length();
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  uint32_t size_of() const { return sizeof(*this); }
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  enum_field_types real_type() const { return DRIZZLE_TYPE_VARCHAR; }
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  bool has_charset(void) const
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  { return charset() == &my_charset_bin ? false : true; }
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  Field *new_field(memory::Root *root, Table *new_table, bool keep_type);
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  Field *new_key_field(memory::Root *root, Table *new_table,
 
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  Field *new_field(MEM_ROOT *root, Table *new_table, bool keep_type);
 
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  Field *new_key_field(MEM_ROOT *root, Table *new_table,
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                       unsigned char *new_ptr, unsigned char *new_null_ptr,
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                       uint32_t new_null_bit);
 
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  uint32_t is_equal(CreateField *new_field);
 
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  void hash(uint32_t *nr, uint32_t *nr2);
 
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private:
 
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  int do_save_field_metadata(unsigned char *first_byte);
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};
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} /* namespace drizzled */
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#endif /* DRIZZLED_FIELD_VARSTRING_H */
 
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#endif
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