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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 Sun Microsystems
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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; version 2 of the License.
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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 <drizzled/function/str/format.h>
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Change a number to format '3,333,333,333.000'.
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This should be 'internationalized' sometimes.
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const int FORMAT_MAX_DECIMALS= 30;
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Item_func_format::Item_func_format(Item *org, Item *dec)
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: Item_str_func(org, dec)
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void Item_func_format::fix_length_and_dec()
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collation.set(default_charset());
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uint32_t char_length= args[0]->max_length/args[0]->collation.collation->mbmaxlen;
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max_length= ((char_length + (char_length-args[0]->decimals)/3) *
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collation.collation->mbmaxlen);
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This needs to be fixed for multi-byte character set where numbers
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are stored in more than one byte
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String *Item_func_format::val_str(String *str)
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/* Number of decimal digits */
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/* Number of characters used to represent the decimals, including '.' */
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dec= (int) args[1]->val_int();
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if (args[1]->null_value)
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dec= set_zone(dec, 0, FORMAT_MAX_DECIMALS);
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dec_length= dec ? dec+1 : 0;
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if (args[0]->result_type() == DECIMAL_RESULT ||
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args[0]->result_type() == INT_RESULT)
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my_decimal dec_val, rnd_dec, *res;
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res= args[0]->val_decimal(&dec_val);
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if ((null_value=args[0]->null_value))
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my_decimal_round(E_DEC_FATAL_ERROR, res, dec, false, &rnd_dec);
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my_decimal2string(E_DEC_FATAL_ERROR, &rnd_dec, 0, 0, 0, str);
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str_length= str->length();
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double nr= args[0]->val_real();
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if ((null_value=args[0]->null_value))
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nr= my_double_round(nr, (int64_t) dec, false, false);
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/* Here default_charset() is right as this is not an automatic conversion */
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str->set_real(nr, dec, default_charset());
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if (nr == numeric_limits<double>::quiet_NaN())
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str_length=str->length();
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str_length--; // Don't count sign
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/* We need this test to handle 'nan' values */
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if (str_length >= dec_length+4)
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length= str->length()+(diff=((int)(str_length- dec_length-1))/3);
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str= copy_if_not_alloced(&tmp_str,str,length);
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tmp= (char*) str->ptr()+length - dec_length-1;
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for (pos= (char*) str->ptr()+length-1; pos != tmp; pos--)
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void Item_func_format::print(String *str, enum_query_type query_type)
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str->append(STRING_WITH_LEN("format("));
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args[0]->print(str, query_type);
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args[1]->print(str, query_type);