mirror of
https://github.com/minetest/minetest.git
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116 lines
2.7 KiB
C++
116 lines
2.7 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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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 Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "metadata.h"
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#include "log.h"
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/*
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Metadata
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*/
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void Metadata::clear()
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{
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m_stringvars.clear();
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m_modified = true;
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}
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bool Metadata::empty() const
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{
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return m_stringvars.empty();
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}
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size_t Metadata::size() const
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{
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return m_stringvars.size();
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}
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bool Metadata::contains(const std::string &name) const
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{
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return m_stringvars.find(name) != m_stringvars.end();
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}
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bool Metadata::operator==(const Metadata &other) const
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{
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if (size() != other.size())
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return false;
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for (const auto &sv : m_stringvars) {
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if (!other.contains(sv.first) || other.getString(sv.first) != sv.second)
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return false;
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}
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return true;
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}
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const std::string &Metadata::getString(const std::string &name, u16 recursion) const
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{
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StringMap::const_iterator it = m_stringvars.find(name);
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if (it == m_stringvars.end()) {
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static const std::string empty_string = std::string("");
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return empty_string;
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}
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return resolveString(it->second, recursion);
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}
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bool Metadata::getStringToRef(
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const std::string &name, std::string &str, u16 recursion) const
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{
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StringMap::const_iterator it = m_stringvars.find(name);
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if (it == m_stringvars.end()) {
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return false;
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}
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str = resolveString(it->second, recursion);
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return true;
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}
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/**
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* Sets var to name key in the metadata storage
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*
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* @param name
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* @param var
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* @return true if key-value pair is created or changed
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*/
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bool Metadata::setString(const std::string &name, const std::string &var)
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{
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if (var.empty()) {
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m_stringvars.erase(name);
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return true;
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}
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StringMap::iterator it = m_stringvars.find(name);
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if (it != m_stringvars.end() && it->second == var) {
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return false;
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}
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m_stringvars[name] = var;
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m_modified = true;
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return true;
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}
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const std::string &Metadata::resolveString(const std::string &str, u16 recursion) const
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{
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if (recursion <= 1 && str.substr(0, 2) == "${" && str[str.length() - 1] == '}') {
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return getString(str.substr(2, str.length() - 3), recursion + 1);
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}
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return str;
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}
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