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/* - mode: c++ c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 MySQL
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include <drizzled/field/str.h>
#include <string>
namespace drizzled
{
class Field_varstring :public Field_str {
public:
using Field::store;
using Field::pack;
using Field::unpack;
using Field::val_int;
using Field::val_str;
/*
The maximum space available in a Field_varstring, in bytes. See
length_bytes.
*/
static const uint32_t MAX_SIZE;
private:
/* Store number of bytes used to store length (1 or 2) */
uint32_t length_bytes;
public:
Field_varstring(unsigned char *ptr_arg,
uint32_t len_arg,
uint32_t length_bytes_arg,
unsigned char *null_ptr_arg,
unsigned char null_bit_arg,
const char *field_name_arg,
const charset_info_st * const cs);
Field_varstring(uint32_t len_arg,
bool maybe_null_arg,
const char *field_name_arg,
const charset_info_st * const cs);
enum_field_types type() const { return DRIZZLE_TYPE_VARCHAR; }
enum ha_base_keytype key_type() const;
bool zero_pack() const { return 0; }
int reset(void) { memset(ptr, 0, field_length+length_bytes); return 0; }
uint32_t pack_length() const { return (uint32_t) field_length+length_bytes; }
uint32_t pack_length_no_ptr() const { return length_bytes; }
uint32_t key_length() const { return (uint32_t) field_length; }
uint32_t sort_length() const
{
return (uint32_t) field_length + (field_charset == &my_charset_bin ?
length_bytes : 0);
}
int store(const char *to,uint32_t length, const charset_info_st * const charset);
int store(int64_t nr, bool unsigned_val);
int store(double nr) { return Field_str::store(nr); } /* QQ: To be deleted */
double val_real(void) const;
int64_t val_int(void) const;
String *val_str(String*,String *) const;
inline String *val_str(String *str) { return val_str(str, str); }
type::Decimal *val_decimal(type::Decimal *) const;
int cmp_max(const unsigned char *, const unsigned char *, uint32_t max_length);
inline int cmp(const unsigned char *str) { return cmp(ptr,str); }
int cmp(const unsigned char *a,const unsigned char *b)
{
return cmp_max(a, b, UINT32_MAX);
}
void sort_string(unsigned char *buff,uint32_t length);
uint32_t get_key_image(unsigned char *buff,uint32_t length);
uint32_t get_key_image(std::basic_string <unsigned char> &buff, uint32_t length);
void set_key_image(const unsigned char *buff,uint32_t length);
void sql_type(String &str) const;
virtual unsigned char *pack(unsigned char *to,
const unsigned char *from,
uint32_t max_length,
bool low_byte_first);
virtual const unsigned char *unpack(unsigned char* to,
const unsigned char *from,
uint32_t param_data,
bool low_byte_first);
int cmp_binary(const unsigned char *a,const unsigned char *b, uint32_t max_length=UINT32_MAX);
int key_cmp(const unsigned char *,const unsigned char*);
int key_cmp(const unsigned char *str, uint32_t length);
uint32_t max_packed_col_length(uint32_t max_length);
uint32_t used_length();
uint32_t size_of() const { return sizeof(*this); }
enum_field_types real_type() const { return DRIZZLE_TYPE_VARCHAR; }
bool has_charset(void) const
{ return charset() == &my_charset_bin ? false : true; }
Field *new_field(memory::Root *root, Table *new_table, bool keep_type);
Field *new_key_field(memory::Root *root, Table *new_table,
unsigned char *new_ptr, unsigned char *new_null_ptr,
uint32_t new_null_bit);
};
} /* namespace drizzled */
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