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492.3.7
by Lee
code clean move Item_func_div, Item_func_minus, Item_func_mul, Item_func_plus to functions directory |
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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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*
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* Copyright (C) 2008 Sun Microsystems
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*
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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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*
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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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*
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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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*/
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#include <drizzled/server_includes.h> |
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#include CSTDINT_H
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642.1.30
by Lee
move math functions to drizzled/function/math directory |
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#include <drizzled/function/math/multiply.h> |
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492.3.7
by Lee
code clean move Item_func_div, Item_func_minus, Item_func_mul, Item_func_plus to functions directory |
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double Item_func_mul::real_op() |
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{
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assert(fixed == 1); |
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double value= args[0]->val_real() * args[1]->val_real(); |
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if ((null_value=args[0]->null_value || args[1]->null_value)) |
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return 0.0; |
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return fix_result(value); |
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}
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int64_t Item_func_mul::int_op() |
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{
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assert(fixed == 1); |
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int64_t value=args[0]->val_int()*args[1]->val_int(); |
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if ((null_value=args[0]->null_value || args[1]->null_value)) |
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return 0; |
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return value; |
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}
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/** See Item_func_plus::decimal_op for comments. */
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my_decimal *Item_func_mul::decimal_op(my_decimal *decimal_value) |
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{
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my_decimal value1, *val1; |
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my_decimal value2, *val2; |
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val1= args[0]->val_decimal(&value1); |
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if ((null_value= args[0]->null_value)) |
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return 0; |
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val2= args[1]->val_decimal(&value2); |
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if (!(null_value= (args[1]->null_value || |
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(my_decimal_mul(E_DEC_FATAL_ERROR, decimal_value, val1, |
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val2) > 3)))) |
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return decimal_value; |
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return 0; |
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}
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void Item_func_mul::result_precision() |
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{
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/* Integer operations keep unsigned_flag if one of arguments is unsigned */
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if (result_type() == INT_RESULT) |
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unsigned_flag= args[0]->unsigned_flag | args[1]->unsigned_flag; |
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else
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unsigned_flag= args[0]->unsigned_flag & args[1]->unsigned_flag; |
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decimals= cmin(args[0]->decimals + args[1]->decimals, DECIMAL_MAX_SCALE); |
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int precision= cmin(args[0]->decimal_precision() + args[1]->decimal_precision(), |
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(unsigned int)DECIMAL_MAX_PRECISION); |
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max_length= my_decimal_precision_to_length(precision, decimals,unsigned_flag); |
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}
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