112 lines
3.8 KiB
C++
112 lines
3.8 KiB
C++
/*
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Copyright (c) 2014, 2017, 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, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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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, version 2.0, 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 <functional>
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#include <string>
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#include "client/base/abstract_value_option.h"
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#include "my_getopt.h"
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#include "nullable.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>
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class Abstract_string_option : public Abstract_value_option<T_type> {
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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 description Description of option to be printed in --help.
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*/
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Abstract_string_option(Nullable<std::string> *value, ulong var_type,
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std::string name, 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>
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Abstract_string_option<T_type>::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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: Abstract_value_option<T_type>(&this->m_original_value, var_type, name,
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description, (uint64)NULL),
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m_destination_value(value) {
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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 std::function<void(char *)>(
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std::bind(&Abstract_string_option<T_type>::string_callback, this,
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std::placeholders::_1)));
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}
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template <typename T_type>
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T_type *Abstract_string_option<T_type>::set_value(std::string value) {
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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 =
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(uint64)this->m_destination_value->value().c_str();
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return (T_type *)this;
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}
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template <typename T_type>
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void Abstract_string_option<T_type>::string_callback(char *argument) {
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if (argument != NULL) {
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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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} else {
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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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} // namespace Options
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} // namespace Base
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} // namespace Tools
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} // namespace Mysql
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#endif
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