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492.3.2
by Lee
code clean up to moving functions into drizzled/functions directory - Item_num_op and Item_numhybrid |
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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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#ifndef DRIZZLED_FUNCTIONS_NUMHYBRID_H
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#define DRIZZLED_FUNCTIONS_NUMHYBRID_H
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#include <drizzled/item.h> |
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#include <drizzled/functions/func.h> |
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class Item_func_numhybrid: public Item_func |
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{
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protected: |
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Item_result hybrid_type; |
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public: |
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Item_func_numhybrid(Item *a) :Item_func(a), hybrid_type(REAL_RESULT) |
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{}
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Item_func_numhybrid(Item *a,Item *b) |
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:Item_func(a,b), hybrid_type(REAL_RESULT) |
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{}
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Item_func_numhybrid(List<Item> &list) |
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:Item_func(list), hybrid_type(REAL_RESULT) |
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{}
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enum Item_result result_type () const { return hybrid_type; } |
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void fix_length_and_dec(); |
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void fix_num_length_and_dec(); |
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virtual void find_num_type()= 0; /* To be called from fix_length_and_dec */ |
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double val_real(); |
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int64_t val_int(); |
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my_decimal *val_decimal(my_decimal *); |
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String *val_str(String*str); |
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/**
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@brief Performs the operation that this functions implements when the
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result type is INT.
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@return The result of the operation.
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*/
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virtual int64_t int_op()= 0; |
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/**
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@brief Performs the operation that this functions implements when the
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result type is REAL.
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@return The result of the operation.
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*/
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virtual double real_op()= 0; |
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/**
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@brief Performs the operation that this functions implements when the
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result type is DECIMAL.
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@param A pointer where the DECIMAL value will be allocated.
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@return
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- 0 If the result is NULL
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- The same pointer it was given, with the area initialized to the
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result of the operation.
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*/
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virtual my_decimal *decimal_op(my_decimal *)= 0; |
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/**
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@brief Performs the operation that this functions implements when the
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result type is a string type.
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@return The result of the operation.
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*/
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virtual String *str_op(String *)= 0; |
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bool is_null() { update_null_value(); return null_value; } |
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};
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#endif /* DRIZZLED_FUNCTIONS_NUMHYBRID_H */ |