diff options
Diffstat (limited to 'src/units.cpp')
| -rw-r--r-- | src/units.cpp | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/src/units.cpp b/src/units.cpp new file mode 100644 index 00000000..4f8b95f0 --- /dev/null +++ b/src/units.cpp @@ -0,0 +1,232 @@ +/* + * Support for custom units + * Copyright (C) 2009 The Mana World Development Team + * + * This file is part of The Mana World. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "units.h" + +#include <cmath> +#include <climits> +#include <vector> + +#include "log.h" + +#include "utils/strprintf.h" +#include "utils/stringutils.h" +#include "utils/xml.h" + +struct UnitLevel { + std::string symbol; + int count; + int round; +}; + +struct UnitDescription { + std::vector<struct UnitLevel> levels; + double conversion; + bool mix; +}; + +enum UnitType { + UNIT_WEIGHT = 0, + UNIT_CURRENCY = 1, + UNIT_END +}; + +struct UnitDescription units[UNIT_END]; + +void Units::loadUnits() +{ + int level; + std::string type; + XML::Document doc("units.xml"); + xmlNodePtr root = doc.rootNode(); + + { // Setup default weight + struct UnitDescription ud; + + ud.conversion = 1.0; + ud.mix = false; + + struct UnitLevel bu; + bu.symbol = "g"; + bu.count = 1; + bu.round = 0; + + ud.levels.push_back(bu); + + struct UnitLevel ul; + ul.symbol = "kg"; + ul.count = 1000; + ul.round = 2; + + ud.levels.push_back(ul); + + units[UNIT_WEIGHT] = ud; + } + + { // Setup default currency + struct UnitDescription ud; + + ud.conversion = 1.0; + ud.mix = false; + + struct UnitLevel bu; + bu.symbol = "¤"; + bu.count = 1; + bu.round = 0; + + ud.levels.push_back(bu); + + units[UNIT_CURRENCY] = ud; + } + + if (!root || !xmlStrEqual(root->name, BAD_CAST "units")) + { + logger->log("Error loading unit definition file: units.xml"); + return; + } + + for_each_xml_child_node(node, root) + { + if (xmlStrEqual(node->name, BAD_CAST "unit")) + { + struct UnitDescription ud; + level = 1; + type = XML::getProperty(node, "type", ""); + ud.conversion = XML::getProperty(node, "conversion", 1.0); + ud.mix = XML::getProperty(node, "mix", "no") == "yes"; + + struct UnitLevel bu; + bu.symbol = XML::getProperty(node, "base", "¤"); + bu.count = 1; + bu.round = XML::getProperty(node, "round", 2); + + ud.levels.push_back(bu); + + for_each_xml_child_node(uLevel, node) + { + if (xmlStrEqual(uLevel->name, BAD_CAST "level")) + { + struct UnitLevel ul; + ul.symbol = XML::getProperty(uLevel, "symbol", + strprintf("¤%d",level)); + ul.count = XML::getProperty(uLevel, "count", -1); + ul.round = XML::getProperty(uLevel, "round", bu.round); + + if (ul.count > 0) + { + ud.levels.push_back(ul); + level++; + } + else + { + logger->log("Error bad unit count: %d for %s in %s", + ul.count, ul.symbol.c_str(), bu.symbol.c_str()); + } + } + } + + // Add one more level for saftey + struct UnitLevel ll; + ll.symbol = ""; + ll.count = INT_MAX; + ll.round = 0; + + ud.levels.push_back(ll); + + if (type == "weight") units[UNIT_WEIGHT] = ud; + else if (type =="currency") units[UNIT_CURRENCY] = ud; + else logger->log("Error unknown unit type: %s", type.c_str()); + } + } +} + +std::string formatUnit(int value, int type) +{ + struct UnitDescription ud = units[type]; + struct UnitLevel ul; + double amount = ud.conversion * value; + + // Shortcut for 0 + if (value == 0) { + ul = ud.levels[0]; + return strprintf("0%s", ul.symbol.c_str()); + } else { + // If only the first level is needed, act like mix if false + if (ud.mix && ud.levels.size() > 0 && ud.levels[1].count < amount) + { + std::string output; + struct UnitLevel pl = ud.levels[0]; + ul = ud.levels[1]; + int levelAmount = (int) amount; + int nextAmount; + + levelAmount /= ul.count; + + amount -= levelAmount * ul.count; + + if (amount > 0) { + output = strprintf("%.*f%s", pl.round, amount, + pl.symbol.c_str()); + } + + for (unsigned int i = 2; i < ud.levels.size(); i++) + { + pl = ul; + ul = ud.levels[i]; + + nextAmount = levelAmount / ul.count; + levelAmount %= ul.count; + + if (levelAmount > 0) output = strprintf("%d%s", + levelAmount, pl.symbol.c_str()) + output; + + if (!nextAmount) break; + levelAmount = nextAmount; + } + + return output; + } + else + { + for (unsigned int i = 0; i < ud.levels.size(); i++) + { + ul = ud.levels[i]; + if (amount < ul.count && ul.count > 0) { + ul = ud.levels[i - 1]; + break; + } + amount /= ul.count; + } + + return strprintf("%.*f%s", ul.round, amount, ul.symbol.c_str()); + } + } +} + +std::string Units::formatCurrency(int value) +{ + return formatUnit(value, UNIT_CURRENCY); +} + +std::string Units::formatWeight(int value) +{ + return formatUnit(value, UNIT_WEIGHT); +} |