Add configurable units system

17 files changed, 353 insertions, 38 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 65b60c8c..2777f38b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -342,6 +342,8 @@ tmw_SOURCES = gui/widgets/dropdown.cpp \
 	      textparticle.cpp \
 	      textparticle.h \
 	      tileset.h \
+	      units.cpp \
+	      units.h \
 	      vector.cpp \
 	      vector.h
 
diff --git a/src/gui/buy.cpp b/src/gui/buy.cpp
index 0c8c4d9d..23bf89f5 100644
--- a/src/gui/buy.cpp
+++ b/src/gui/buy.cpp
@@ -31,6 +31,7 @@
 #include "widgets/layout.h"
 
 #include "../npc.h"
+#include "../units.h"
 
 #include "../net/messageout.h"
 #include "../net/protocol.h"
@@ -54,7 +55,8 @@ BuyDialog::BuyDialog(Network *network):
     mScrollArea = new ScrollArea(mShopItemList);
     mSlider = new Slider(1.0);
     mQuantityLabel = new gcn::Label("0");
-    mMoneyLabel = new gcn::Label(strprintf(_("Price: %d GP / Total: %d GP"), 0, 0));
+    mMoneyLabel = new gcn::Label(strprintf(_("Price: %s / Total: %s"),
+                                            "", ""));
     mIncreaseButton = new Button("+", "+", this);
     mDecreaseButton = new Button("-", "-", this);
     mBuyButton = new Button(_("Buy"), "buy", this);
@@ -235,5 +237,7 @@ void BuyDialog::updateButtonsAndLabels()
     // Update quantity and money labels
     mQuantityLabel->setCaption(strprintf("%d / %d", mAmountItems, mMaxItems));
     mMoneyLabel->setCaption
-        (strprintf(_("Price: %d GP / Total: %d GP"), price, mMoney - price));
+        (strprintf(_("Price: %s / Total: %s"),
+                    Units::formatCurrency(price).c_str(),
+                    Units::formatCurrency(mMoney - price).c_str()));
 }
diff --git a/src/gui/char_select.cpp b/src/gui/char_select.cpp
index 8de4f5a7..34174275 100644
--- a/src/gui/char_select.cpp
+++ b/src/gui/char_select.cpp
@@ -37,6 +37,7 @@
 #include "../game.h"
 #include "../localplayer.h"
 #include "../main.h"
+#include "../units.h"
 
 #include "../net/charserverhandler.h"
 #include "../net/messageout.h"
@@ -85,6 +86,9 @@ CharSelectDialog::CharSelectDialog(Network *network,
     Window(_("Select Character")), mNetwork(network),
     mCharInfo(charInfo), mGender(gender), mCharSelected(false)
 {
+    LocalPlayer *pi = mCharInfo->getEntry();
+    if (pi)
+        mMoney = Units::formatCurrency(pi->mGp);
     // Control that shows the Player
     mPlayerBox = new PlayerBox;
     mPlayerBox->setWidth(74);
@@ -92,7 +96,7 @@ CharSelectDialog::CharSelectDialog(Network *network,
     mNameLabel = new gcn::Label(strprintf(_("Name: %s"), ""));
     mLevelLabel = new gcn::Label(strprintf(_("Level: %d"), 0));
     mJobLevelLabel = new gcn::Label(strprintf(_("Job Level: %d"), 0));
-    mMoneyLabel = new gcn::Label(strprintf(_("Money: %d"), 0));
+    mMoneyLabel = new gcn::Label(strprintf(_("Money: %s"), mMoney.c_str()));
 
     const std::string tempString = getFont()->getWidth(_("New")) <
                                    getFont()->getWidth(_("Delete")) ?
@@ -163,10 +167,16 @@ void CharSelectDialog::action(const gcn::ActionEvent &event)
     else if (event.getId() == "previous")
     {
         mCharInfo->prev();
+        LocalPlayer *pi = mCharInfo->getEntry();
+        if (pi)
+            mMoney = Units::formatCurrency(pi->mGp);
     }
     else if (event.getId() == "next")
     {
         mCharInfo->next();
+        LocalPlayer *pi = mCharInfo->getEntry();
+        if (pi)
+            mMoney = Units::formatCurrency(pi->mGp);
     }
 }
 
@@ -176,10 +186,12 @@ void CharSelectDialog::updatePlayerInfo()
 
     if (pi)
     {
-        mNameLabel->setCaption(strprintf(_("Name: %s"), pi->getName().c_str()));
+        mNameLabel->setCaption(strprintf(_("Name: %s"),
+                                          pi->getName().c_str()));
         mLevelLabel->setCaption(strprintf(_("Level: %d"), pi->mLevel));
-        mJobLevelLabel->setCaption(strprintf(_("Job Level: %d"), pi->mJobLevel));
-        mMoneyLabel->setCaption(strprintf(_("Gold: %d"), pi->mGp));
+        mJobLevelLabel->setCaption(strprintf(_("Job Level: %d"),
+                                              pi->mJobLevel));
+        mMoneyLabel->setCaption(strprintf(_("Money: %s"), mMoney.c_str()));
         if (!mCharSelected)
         {
             mNewDelCharButton->setCaption(_("Delete"));
@@ -191,7 +203,7 @@ void CharSelectDialog::updatePlayerInfo()
         mNameLabel->setCaption(strprintf(_("Name: %s"), ""));
         mLevelLabel->setCaption(strprintf(_("Level: %d"), 0));
         mJobLevelLabel->setCaption(strprintf(_("Job Level: %d"), 0));
-        mMoneyLabel->setCaption(strprintf(_("Money: %d"), 0));
+        mMoneyLabel->setCaption(strprintf(_("Money: %s"), 0));
         mNewDelCharButton->setCaption(_("New"));
         mSelectButton->setEnabled(false);
     }
diff --git a/src/gui/char_select.h b/src/gui/char_select.h
index 23de061d..28091a18 100644
--- a/src/gui/char_select.h
+++ b/src/gui/char_select.h
@@ -71,7 +71,7 @@ class CharSelectDialog : public Window, public gcn::ActionListener
         gcn::Label *mNameLabel;
         gcn::Label *mLevelLabel;
         gcn::Label *mJobLevelLabel;
-        gcn::Label *mMoneyLabel;
+        gcn::Label *mMoneyLabel; std::string mMoney;
 
         PlayerBox *mPlayerBox;
 
diff --git a/src/gui/chat.cpp b/src/gui/chat.cpp
index 484426dd..21e4f106 100644
--- a/src/gui/chat.cpp
+++ b/src/gui/chat.cpp
@@ -667,7 +667,7 @@ std::string ChatWindow::const_msg(CHATSKILL act)
                 msg += _("You cannot do that right now!");
                 break;
             case RFAIL_ZENY:
-                msg += _("Seems you need more GP... ;-)");
+                msg += _("Seems you need more money... ;-)");
                 break;
             case RFAIL_WEAPON:
                 msg += _("You cannot use this skill with that kind of weapon!");
diff --git a/src/gui/inventorywindow.cpp b/src/gui/inventorywindow.cpp
index af3b29a2..6debf473 100644
--- a/src/gui/inventorywindow.cpp
+++ b/src/gui/inventorywindow.cpp
@@ -38,6 +38,7 @@
 
 #include "../inventory.h"
 #include "../item.h"
+#include "../units.h"
 
 #include "../resources/iteminfo.h"
 
@@ -76,8 +77,8 @@ InventoryWindow::InventoryWindow(int invSize):
     mInvenScroll = new ScrollArea(mItems);
     mInvenScroll->setHorizontalScrollPolicy(gcn::ScrollArea::SHOW_NEVER);
 
-    mTotalWeight = toString(player_node->mTotalWeight);
-    mMaxWeight = toString(player_node->mMaxWeight);
+    mTotalWeight = -1;
+    mMaxWeight = -1;
     mUsedSlots = toString(player_node->getInventory()->getNumberOfSlotsUsed());
 
     mSlotsLabel = new gcn::Label(_("Slots: "));
@@ -124,12 +125,12 @@ void InventoryWindow::logic()
     // redesign of InventoryWindow and ItemContainer probably.
     updateButtons();
 
-    if ((mMaxWeight != toString(player_node->mMaxWeight)) ||
-         mTotalWeight != toString(player_node->mTotalWeight) ||
+    if (mMaxWeight != player_node->mMaxWeight ||
+         mTotalWeight != player_node->mTotalWeight ||
          mUsedSlots != toString(player_node->getInventory()->getNumberOfSlotsUsed()))
     {
-        mTotalWeight = toString(player_node->mTotalWeight);
-        mMaxWeight = toString(player_node->mMaxWeight);
+        mTotalWeight = player_node->mTotalWeight;
+        mMaxWeight = player_node->mMaxWeight;
         mUsedSlots = toString(player_node->getInventory()->getNumberOfSlotsUsed());
 
         // Weight Bar coloration
@@ -154,8 +155,9 @@ void InventoryWindow::logic()
                                         player_node->mMaxWeight);
 
         mSlotsBar->setText(strprintf("%s/%d", mUsedSlots.c_str(), mMaxSlots));
-        mWeightBar->setText(strprintf("%sg/%sg", mTotalWeight.c_str(),
-                                                 mMaxWeight.c_str()));
+        mWeightBar->setText(strprintf("%s/%s",
+                                    Units::formatWeight(mTotalWeight).c_str(),
+                                    Units::formatWeight(mMaxWeight).c_str()));
     }
 }
 
diff --git a/src/gui/inventorywindow.h b/src/gui/inventorywindow.h
index 78d30461..6c66b95e 100644
--- a/src/gui/inventorywindow.h
+++ b/src/gui/inventorywindow.h
@@ -78,8 +78,7 @@ class InventoryWindow : public Window, gcn::ActionListener,
         std::string mWeight;
         std::string mSlots;
         std::string mUsedSlots;
-        std::string mTotalWeight;
-        std::string mMaxWeight;
+        int mTotalWeight, mMaxWeight;
         gcn::Button *mUseButton, *mDropButton;
         gcn::ScrollArea *mInvenScroll;
 
diff --git a/src/gui/itempopup.cpp b/src/gui/itempopup.cpp
index 008a41d9..ee28435b 100644
--- a/src/gui/itempopup.cpp
+++ b/src/gui/itempopup.cpp
@@ -32,6 +32,8 @@
 
 #include "widgets/layout.h"
 
+#include "../units.h"
+
 #include "../resources/iteminfo.h"
 
 #include "../utils/gettext.h"
@@ -108,8 +110,8 @@ void ItemPopup::setItem(const ItemInfo &item)
     mItemName->setWidth(boldFont->getWidth(item.getName()));
     mItemDesc->setTextWrapped(item.getDescription(), 196);
     mItemEffect->setTextWrapped(item.getEffect(), 196);
-    mItemWeight->setTextWrapped(_("Weight: ") + toString(item.getWeight()) +
-                                _(" grams"), 196);
+    mItemWeight->setTextWrapped(_("Weight: ") +
+                                Units::formatWeight(item.getWeight()), 196);
 
     int minWidth = mItemName->getWidth();
 
diff --git a/src/gui/sell.cpp b/src/gui/sell.cpp
index e4be7921..a46f3ce6 100644
--- a/src/gui/sell.cpp
+++ b/src/gui/sell.cpp
@@ -31,6 +31,7 @@
 #include "widgets/layout.h"
 
 #include "../npc.h"
+#include "../units.h"
 
 #include "../net/messageout.h"
 #include "../net/protocol.h"
@@ -55,8 +56,8 @@ SellDialog::SellDialog(Network *network):
     mScrollArea = new ScrollArea(mShopItemList);
     mSlider = new Slider(1.0);
     mQuantityLabel = new gcn::Label("0");
-    mMoneyLabel = new gcn::Label(
-        strprintf(_("Price: %d GP / Total: %d GP"), 0, 0));
+    mMoneyLabel = new gcn::Label(strprintf(_("Price: %s / Total: %s"),
+                                            "", ""));
     mIncreaseButton = new Button("+", "+", this);
     mDecreaseButton = new Button("-", "-", this);
     mSellButton = new Button(_("Sell"), "sell", this);
@@ -249,7 +250,7 @@ void SellDialog::updateButtonsAndLabels()
 
     // Update the quantity and money labels
     mQuantityLabel->setCaption(strprintf("%d / %d", mAmountItems, mMaxItems));
-    mMoneyLabel->setCaption
-        (strprintf(_("Price: %d GP / Total: %d GP"),
-                   income, mPlayerMoney + income));
+    mMoneyLabel->setCaption(strprintf(_("Price: %s / Total: %s"),
+                    Units::formatCurrency(income).c_str(),
+                    Units::formatCurrency(mPlayerMoney - income).c_str()));
 }
diff --git a/src/gui/status.cpp b/src/gui/status.cpp
index 683a9a41..cb02a57a 100644
--- a/src/gui/status.cpp
+++ b/src/gui/status.cpp
@@ -29,6 +29,7 @@
 #include "widgets/layout.h"
 
 #include "../localplayer.h"
+#include "../units.h"
 
 #include "../utils/gettext.h"
 #include "../utils/strprintf.h"
@@ -36,7 +37,9 @@
 
 StatusWindow::StatusWindow(LocalPlayer *player):
     Window(player->getName()),
-    mPlayer(player)
+    mPlayer(player),
+    currency(-1),
+    currencyS("?")
 {
     setWindowName(_("Status"));
     setCloseButton(true);
@@ -49,7 +52,7 @@ StatusWindow::StatusWindow(LocalPlayer *player):
 
     mLvlLabel = new gcn::Label(strprintf(_("Level: %d"), 0));
     mJobLvlLabel = new gcn::Label(strprintf(_("Job: %d"), 0));
-    mGpLabel = new gcn::Label(strprintf(_("Money: %d GP"), 0));
+    mGpLabel = new gcn::Label(strprintf(_("Money: %s"), ""));
 
     mHpLabel = new gcn::Label(_("HP:"));
     mHpBar = new ProgressBar(1.0f, 80, 15, 0, 171, 34);
@@ -171,8 +174,12 @@ void StatusWindow::update()
     mJobLvlLabel->setCaption(strprintf(_("Job: %d"), mPlayer->mJobLevel));
     mJobLvlLabel->adjustSize();
 
-    mGpLabel->setCaption(strprintf(_("Money: %d GP"), mPlayer->mGp));
-    mGpLabel->adjustSize();
+    if (currency != mPlayer->mGp) {
+        currency = mPlayer->mGp;
+        currencyS = strprintf(_("Money: %s"), Units::formatCurrency(currency).c_str());
+        mGpLabel->setCaption(currencyS);
+        mGpLabel->adjustSize();
+    }
 
     mHpBar->setText(toString(mPlayer->mHp) +
                     "/" + toString(mPlayer->mMaxHp));
diff --git a/src/gui/status.h b/src/gui/status.h
index 00a48f4e..7545d696 100644
--- a/src/gui/status.h
+++ b/src/gui/status.h
@@ -64,7 +64,7 @@ class StatusWindow : public Window, public gcn::ActionListener
          * Status Part
          */
         gcn::Label *mLvlLabel, *mJobLvlLabel;
-        gcn::Label *mGpLabel;
+        gcn::Label *mGpLabel; int currency; std::string currencyS;
         gcn::Label *mHpLabel, *mMpLabel, *mXpLabel, *mJobLabel;
         ProgressBar *mHpBar, *mMpBar;
         ProgressBar *mXpBar, *mJobBar;
diff --git a/src/gui/trade.cpp b/src/gui/trade.cpp
index af30d1fe..9c11afd4 100644
--- a/src/gui/trade.cpp
+++ b/src/gui/trade.cpp
@@ -37,6 +37,7 @@
 #include "../inventory.h"
 #include "../item.h"
 #include "../localplayer.h"
+#include "../units.h"
 
 #include "../net/messageout.h"
 #include "../net/protocol.h"
@@ -77,7 +78,7 @@ TradeWindow::TradeWindow(Network *network):
 
     mPartnerScroll = new ScrollArea(mPartnerItemContainer);
 
-    mMoneyLabel = new gcn::Label(strprintf(_("You get %d GP."), 0));
+    mMoneyLabel = new gcn::Label(strprintf(_("You get %s."), ""));
     mMoneyLabel2 = new gcn::Label(_("You give:"));
     mMoneyField = new TextField;
     mMoneyField->setWidth(50);
@@ -119,7 +120,8 @@ void TradeWindow::widgetResized(const gcn::Event &event)
 
 void TradeWindow::addMoney(int amount)
 {
-    mMoneyLabel->setCaption(strprintf(_("You get %d GP."), amount));
+    mMoneyLabel->setCaption(strprintf(_("You get %s."),
+                                       Units::formatCurrency(amount).c_str()));
     mMoneyLabel->adjustSize();
 }
 
@@ -169,7 +171,7 @@ void TradeWindow::reset()
     mOkButton->setEnabled(true);
     mOkOther = false;
     mOkMe = false;
-    mMoneyLabel->setCaption(strprintf(_("You get %d GP."), 0));
+    mMoneyLabel->setCaption(strprintf(_("You get %s."), ""));
     mMoneyField->setEnabled(true);
     mMoneyField->setText("");
 }
diff --git a/src/main.cpp b/src/main.cpp
index a9cf5abf..a368ae5c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -51,6 +51,7 @@
 #include "player_relations.h"
 #include "serverinfo.h"
 #include "sound.h"
+#include "units.h"
 
 #include "gui/button.h"
 #include "gui/char_server.h"
@@ -897,6 +898,8 @@ int main(int argc, char *argv[])
                     login_wallpaper->decRef();
                     login_wallpaper = ResourceManager::getInstance()->
                         getImage(wallpaperName);
+                    // Load units
+                    Units::loadUnits();
                     break;
 
                     // Those states don't cause a network disconnect
diff --git a/src/net/playerhandler.cpp b/src/net/playerhandler.cpp
index cfdfbe63..e142dd91 100644
--- a/src/net/playerhandler.cpp
+++ b/src/net/playerhandler.cpp
@@ -27,6 +27,7 @@
 #include "../localplayer.h"
 #include "../log.h"
 #include "../npc.h"
+#include "../units.h"
 
 #include "../gui/buy.h"
 #include "../gui/chat.h"
@@ -281,8 +282,8 @@ void PlayerHandler::handleMessage(MessageIn *msg)
                         player_node->mGp = msg->readInt32();
                         if (player_node->mGp > curGp)
                             chatWindow->chatLog(_("You picked up ") +
-                                toString(player_node->mGp - curGp) + " GP",
-                                BY_SERVER);
+                                Units::formatCurrency(player_node->mGp
+                                    - curGp), BY_SERVER);
                     }
                     break;
                 case 0x0016:
diff --git a/src/shopitem.cpp b/src/shopitem.cpp
index 3b90dfdd..6547aaf1 100644
--- a/src/shopitem.cpp
+++ b/src/shopitem.cpp
@@ -21,11 +21,12 @@
 
 #include "shopitem.h"
 
-#include "utils/tostring.h"
+#include "units.h"
 
 ShopItem::ShopItem(int id, int quantity, int price):
     Item(id, quantity),
     mPrice(price)
 {
-    mDisplayName = getInfo().getName() + " (" + toString(mPrice) + " GP)";
+    mDisplayName = getInfo().getName() +
+                        " (" + Units::formatCurrency(mPrice).c_str() + ")";
 }
diff --git a/src/units.cpp b/src/units.cpp
new file mode 100644
index 00000000..8fa11c9f
--- /dev/null
+++ b/src/units.cpp
@@ -0,0 +1,233 @@
+/*
+ *  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/tostring.h"
+#include "utils/trim.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(const int value, const 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 (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 (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(const int value)
+{
+    return formatUnit(value, UNIT_CURRENCY);
+}
+
+std::string Units::formatWeight(const int value)
+{
+    return formatUnit(value, UNIT_WEIGHT);
+}
diff --git a/src/units.h b/src/units.h
new file mode 100644
index 00000000..67e027de
--- /dev/null
+++ b/src/units.h
@@ -0,0 +1,46 @@
+/*
+ *  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
+ */
+
+#ifndef UNITS_H
+#define UNITS_H
+
+#include <string>
+
+class Units
+{
+    public:
+        /**
+        * Loads and parses the units.xml file (if found).
+        */
+        static void loadUnits();
+
+        /**
+        * Formats the given number in the correct currency format.
+        */
+        static std::string formatCurrency(const int value);
+
+        /**
+        * Formats the given number in the correct weight/mass format.
+        */
+        static std::string formatWeight(const int value);
+};
+
+#endif // UNITS_H