111 lines
3.2 KiB
C++
111 lines
3.2 KiB
C++
/*
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Copyright (c) 2014, 2015 Oracle and/or its affiliates. All rights reserved.
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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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*/
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#ifndef ABSTRACT_STRING_OPTION_INCLUDED
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#define ABSTRACT_STRING_OPTION_INCLUDED
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#include <string>
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#include "my_getopt.h"
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#include "abstract_value_option.h"
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#include "nullable.h"
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#include "instance_callback.h"
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namespace Mysql{
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namespace Tools{
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namespace Base{
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namespace Options{
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/**
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Abstract option to handle options accepting string value argument.
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*/
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template<typename T_type> class Abstract_string_option
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: public Abstract_value_option<T_type>
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{
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public:
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/**
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Sets value for this option. If it is specified before handling commandline
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options then supplied value is used as default value of this option.
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*/
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T_type* set_value(std::string value);
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protected:
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/**
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Constructs new string option.
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@param value Pointer to string object to receive option value.
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@param var_type my_getopt internal option type.
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@param name Name of option. It is used in command line option name as
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--name.
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@param desription Description of option to be printed in --help.
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*/
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Abstract_string_option(
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Nullable<std::string>* value, ulong var_type, std::string name,
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std::string description);
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Nullable<std::string>* m_destination_value;
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private:
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void string_callback(char* argument);
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const char* m_original_value;
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};
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template<typename T_type> Abstract_string_option<T_type>::Abstract_string_option(
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Nullable<std::string>* value, ulong var_type, std::string name, std::string description)
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: Abstract_value_option<T_type>(
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&this->m_original_value, var_type, name, description, (uint64)NULL),
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m_destination_value(value)
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{
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*value= Nullable<std::string>();
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this->m_original_value= NULL;
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this->add_callback(new Instance_callback
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<void, char*, Abstract_string_option<T_type> >(
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this, &Abstract_string_option<T_type>::string_callback));
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}
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template<typename T_type> T_type* Abstract_string_option<T_type>::set_value(
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std::string value)
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{
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*this->m_destination_value= Nullable<std::string>(value);
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this->m_original_value= this->m_destination_value->value().c_str();
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this->m_option_structure.def_value= (uint64)this->m_destination_value
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->value().c_str();
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return (T_type*)this;
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}
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template<typename T_type> void Abstract_string_option<T_type>::string_callback(
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char* argument)
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{
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if (argument != NULL)
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{
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// Copy argument value from char* to destination string.
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*this->m_destination_value= Nullable<std::string>(this->m_original_value);
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}
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else
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{
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// There is no argument supplied, we shouldn't change default value.
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}
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}
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}
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}
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}
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}
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#endif
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