156 lines
5.0 KiB
C++
156 lines
5.0 KiB
C++
#ifndef OSMIUM_UTIL_OPTIONS_HPP
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#define OSMIUM_UTIL_OPTIONS_HPP
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/*
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This file is part of Osmium (http://osmcode.org/libosmium).
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Copyright 2013,2014 Jochen Topf <jochen@topf.org> and others (see README).
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#include <initializer_list>
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#include <map>
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#include <string>
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#include <utility>
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namespace osmium {
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namespace util {
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/**
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* Stores key=value type options. This class can be used stand-alone or
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* as a base class. Options are stored and retrieved by key using the
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* different set() and get() methods.
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*
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* You can iterate over all set options. Dereferencing an iterator
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* yields a std::pair of the key and value strings.
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*/
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class Options {
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typedef std::map<std::string, std::string> option_map;
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option_map m_options;
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public:
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typedef option_map::iterator iterator;
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typedef option_map::const_iterator const_iterator;
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typedef option_map::value_type value_type;
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Options() = default;
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explicit Options(std::initializer_list<value_type> values) :
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m_options(values) {
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}
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Options(const Options&) = default;
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Options& operator=(const Options&) = default;
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Options(Options&&) = default;
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Options& operator=(Options&&) = default;
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~Options() = default;
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void set(const std::string& key, const std::string& value) {
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m_options[key] = value;
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}
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void set(const std::string& key, const char* value) {
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m_options[key] = value;
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}
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void set(const std::string& key, bool value) {
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m_options[key] = value ? "true" : "false";
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}
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void set(std::string data) {
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size_t pos = data.find_first_of('=');
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if (pos == std::string::npos) {
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m_options[data] = "true";
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} else {
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std::string value = data.substr(pos+1);
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data.erase(pos);
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set(data, value);
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}
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}
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/**
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* Get value of "key" option. If not set the default_value (or
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* empty string) is returned.
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*/
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std::string get(const std::string& key, const std::string& default_value="") const noexcept {
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auto it = m_options.find(key);
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if (it == m_options.end()) {
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return default_value;
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}
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return it->second;
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}
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/**
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* Is this option set to a true value ("true" or "yes")?
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*/
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bool is_true(const std::string& key) const noexcept {
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std::string value = get(key);
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return (value == "true" || value == "yes");
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}
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size_t size() const noexcept {
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return m_options.size();
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}
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iterator begin() noexcept {
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return m_options.begin();
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}
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iterator end() noexcept {
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return m_options.end();
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}
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const_iterator begin() const noexcept {
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return m_options.cbegin();
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}
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const_iterator end() const noexcept {
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return m_options.cend();
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}
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const_iterator cbegin() const noexcept {
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return m_options.cbegin();
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}
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const_iterator cend() const noexcept {
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return m_options.cend();
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}
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}; // class Options
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} // namespace util
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} // namespace osmium
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#endif // OSMIUM_UTIL_OPTIONS_HPP
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