mirror of https://github.com/minetest/minetest.git
113 lines
3.0 KiB
C++
113 lines
3.0 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 "itemstackmetadata.h"
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#include "exceptions.h"
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#include "gamedef.h"
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#include "inventory.h"
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#include "log.h"
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#include "util/serialize.h"
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#include "util/strfnd.h"
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#include "constants.h" // MAP_BLOCKSIZE
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#include <sstream>
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//delimiter constants
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#define DESERIALIZE_START '\x01'
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#define DESERIALIZE_KV_DELIM '\x02'
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#define DESERIALIZE_PAIR_DELIM '\x03'
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#define DESERIALIZE_START_STR "\x01"
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#define DESERIALIZE_KV_DELIM_STR "\x02"
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#define DESERIALIZE_PAIR_DELIM_STR "\x03"
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/*
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ItemStackMetadata
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*/
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std::string ItemStackMetadata::serialize() const
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{
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std::ostringstream os;
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os << DESERIALIZE_START;
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for (StringMap::const_iterator
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it = m_stringvars.begin();
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it != m_stringvars.end(); ++it) {
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os << it->first << DESERIALIZE_KV_DELIM;
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os << it->second << DESERIALIZE_PAIR_DELIM;
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}
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return os.str();
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}
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void ItemStackMetadata::deSerialize(std::string &in)
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{
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m_stringvars.clear();
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//to indicate new serialisation version, a DESERIALIZE_START character has to be the first char in the serialized string. if not, apply legacy deserialization
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if (in[0] == DESERIALIZE_START) {
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Strfnd fnd(in);
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fnd.to(1);
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while ( !fnd.at_end() ) {
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std::string name = fnd.next(DESERIALIZE_KV_DELIM_STR);
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std::string var=fnd.next(DESERIALIZE_PAIR_DELIM_STR);
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m_stringvars[name] = var;
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}
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}else{
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//legacy: store value in empty field ("")
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m_stringvars[""]=in;
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}
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}
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void ItemStackMetadata::clear()
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{
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m_stringvars.clear();
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}
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bool ItemStackMetadata::isEmpty() const
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{
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return m_stringvars.empty();
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}
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std::string ItemStackMetadata::getString(const std::string &name,
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unsigned short 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 "";
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return resolveString(it->second, recursion);
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}
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void ItemStackMetadata::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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} else {
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m_stringvars[name] = var;
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}
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}
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std::string ItemStackMetadata::resolveString(const std::string &str,
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unsigned short recursion) const
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{
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if (recursion > 1) {
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return str;
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}
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if (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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