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/* - mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2008 MySQL
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include <boost/lexical_cast.hpp>
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#include <drizzled/field/enum.h>
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#include <drizzled/error.h>
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#include <drizzled/table.h>
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#include <drizzled/session.h>
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#include <drizzled/strfunc.h>
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#include <drizzled/typelib.h>
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/****************************************************************************
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** This is a string which only can have a selection of different values.
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** If one uses this string in a number context one gets the type number.
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****************************************************************************/
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void Field_enum::store_type(uint64_t value)
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value--; /* we store as starting from 0, although SQL starts from 1 */
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#ifdef WORDS_BIGENDIAN
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if (getTable()->getShare()->db_low_byte_first)
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int4store(ptr, (unsigned short) value);
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longstore(ptr, (unsigned short) value);
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* Given a supplied string, looks up the string in the internal typelib
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* and stores the found key. Upon not finding an entry in the typelib,
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* we always throw an error.
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int Field_enum::store(const char *from, uint32_t length, const CHARSET_INFO * const)
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ASSERT_COLUMN_MARKED_FOR_WRITE;
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/* Remove end space */
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length= field_charset->cset->lengthsp(field_charset, from, length);
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tmp= typelib->find_type2(from, length, field_charset);
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if (length < 6) /* Can't be more than 99999 enums */
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/* This is for reading numbers with LOAD DATA INFILE */
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/* Convert the string to an integer using stringstream */
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if (tmp == 0 || tmp > typelib->count)
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my_error(ER_INVALID_ENUM_VALUE, MYF(ME_FATALERROR), from);
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my_error(ER_INVALID_ENUM_VALUE, MYF(ME_FATALERROR), from);
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store_type((uint64_t) tmp);
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int Field_enum::store(double from)
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return Field_enum::store((int64_t) from, false);
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* @note MySQL allows 0 values, saying that 0 is "the index of the
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* blank string error", whatever that means. Uhm, Drizzle doesn't
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* allow this. To store an ENUM column value using an integer, you
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* must specify the 1-based index of the enum column definition's
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int Field_enum::store(int64_t from, bool)
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ASSERT_COLUMN_MARKED_FOR_WRITE;
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if (from <= 0 || (uint64_t) from > typelib->count)
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/* Convert the integer to a string using boost::lexical_cast */
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std::string tmp(boost::lexical_cast<std::string>(from));
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my_error(ER_INVALID_ENUM_VALUE, MYF(ME_FATALERROR), tmp.c_str());
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store_type((uint64_t) (uint32_t) from);
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double Field_enum::val_real(void) const
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return (double) Field_enum::val_int();
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int64_t Field_enum::val_int(void) const
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ASSERT_COLUMN_MARKED_FOR_READ;
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#ifdef WORDS_BIGENDIAN
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if (getTable()->getShare()->db_low_byte_first)
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return ((int64_t) tmp) + 1; /* SQL is from 1, we store from 0 */
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String *Field_enum::val_str(String *, String *val_ptr) const
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uint32_t tmp=(uint32_t) Field_enum::val_int();
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ASSERT_COLUMN_MARKED_FOR_READ;
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if (not tmp || tmp > typelib->count)
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val_ptr->set("", 0, field_charset);
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val_ptr->set((const char*) typelib->type_names[tmp-1], typelib->type_lengths[tmp-1], field_charset);
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int Field_enum::cmp(const unsigned char *a_ptr, const unsigned char *b_ptr)
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unsigned char *old= ptr;
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ptr= (unsigned char*) a_ptr;
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uint64_t a= Field_enum::val_int();
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ptr= (unsigned char*) b_ptr;
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uint64_t b= Field_enum::val_int();
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return (a < b) ? -1 : (a > b) ? 1 : 0;
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void Field_enum::sort_string(unsigned char *to,uint32_t )
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uint64_t value=Field_enum::val_int()-1; /* SQL is 1 based, stored as 0 based*/
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to+=pack_length() -1;
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for (uint32_t i=0 ; i < pack_length() ; i++)
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*to-- = (unsigned char) (value & 255);
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void Field_enum::sql_type(String &res) const
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String enum_item(buffer, sizeof(buffer), res.charset());
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res.append(STRING_WITH_LEN("enum("));
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uint32_t *len= typelib->type_lengths;
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for (const char **pos= typelib->type_names; *pos; pos++, len++)
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/* convert to res.charset() == utf8, then quote */
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enum_item.copy(*pos, *len, charset(), res.charset(), &dummy_errors);
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append_unescaped(&res, enum_item.c_ptr(), enum_item.length());
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Field *Field_enum::new_field(memory::Root *root, Table *new_table,
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Field_enum *res= (Field_enum*) Field::new_field(root, new_table, keep_type);
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res->typelib= typelib->copy_typelib(root);
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} /* namespace drizzled */