From 8f375a38ad972a1fcac7953cc0d254313c88b7c9 Mon Sep 17 00:00:00 2001
From: Björn Steinbrink <B.Steinbrink@gmx.de>
Date: Wed, 8 Mar 2006 03:21:05 +0000
Subject: Made Inventory use STL algorithms and fixed getLastUsedSlot
 semantics.

---
 ChangeLog                 |  2 ++
 src/gui/itemcontainer.cpp |  4 ++--
 src/inventory.cpp         | 40 ++++++++++++++++++----------------------
 3 files changed, 22 insertions(+), 24 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index a0102dd5..3bb416b9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2006-03-08  Björn Steinbrink  <B.Steinbrink@gmx.de>
 
+	* src/gui/itemcontainer.cpp, src/inventory.cpp: Made Inventory use STL
+	algorithms and fixed getLastUsedSlot semantics.
 	* src/engine.cpp, src/engine.h: Moved a variable definition into the
 	right place and made getCurrentMap inline.
 	* src/equipment.cpp, src/equipment.h: Use STL algorithms and make
diff --git a/src/gui/itemcontainer.cpp b/src/gui/itemcontainer.cpp
index 0cdb8864..67cb5251 100644
--- a/src/gui/itemcontainer.cpp
+++ b/src/gui/itemcontainer.cpp
@@ -49,7 +49,7 @@ ItemContainer::ItemContainer(Inventory *inventory):
     if (!selImg) logger->error("Unable to load selection.png");
 
     selectedItem = 0; // No item selected
-    maxItems = mInventory->getLastUsedSlot();
+    maxItems = mInventory->getLastUsedSlot() - 1; // Count from 0, usage from 2
 
     addMouseListener(this);
 }
@@ -64,7 +64,7 @@ void ItemContainer::logic()
 {
     gcn::Widget::logic();
 
-    int i = mInventory->getLastUsedSlot();
+    int i = mInventory->getLastUsedSlot() - 1; // Count from 0, usage from 2
 
     if (i != maxItems) {
         maxItems = i;
diff --git a/src/inventory.cpp b/src/inventory.cpp
index 65f21292..0467df10 100644
--- a/src/inventory.cpp
+++ b/src/inventory.cpp
@@ -23,8 +23,17 @@
 
 #include "inventory.h"
 
+#include <algorithm>
+
 #include "item.h"
 
+struct SlotUsed : public std::unary_function<Item, bool>
+{
+    bool operator()(const Item &item) const {
+        return (item.getId() != -1 && item.getQuantity() > 0);
+    }
+};
+
 Inventory::Inventory()
 {
     mItems = new Item[INVENTORY_SIZE];
@@ -76,6 +85,7 @@ void Inventory::removeItem(int id)
         if (mItems[i].getId() == id) {
             mItems[i].setId(-1);
             mItems[i].setQuantity(0);
+            mItems[i].setEquipped(false);
         }
     }
 }
@@ -93,37 +103,23 @@ bool Inventory::contains(Item *item)
 
 int Inventory::getFreeSlot()
 {
-    for (int i = 2; i < INVENTORY_SIZE; i++) {
-        if (mItems[i].getId() == -1) {
-            return i;
-        }
-    }
-    return -1;
+    Item *i = std::find_if(mItems + 2, mItems + INVENTORY_SIZE,
+            std::not1(SlotUsed()));
+    return (i == mItems + INVENTORY_SIZE) ? -1 : (i - mItems);
 }
 
 int Inventory::getNumberOfSlotsUsed()
 {
-    int numberOfFilledSlot = 0;
-    for (int i = 0; i < INVENTORY_SIZE; i++)
-    {
-        if (mItems[i].getId() > -1 || mItems[i].getQuantity() > 0) 
-        {
-            numberOfFilledSlot++;
-        }
-    }
-
-    return numberOfFilledSlot;
+    return count_if(mItems, mItems + INVENTORY_SIZE, SlotUsed());
 }
 
 int Inventory::getLastUsedSlot()
 {
-    int i;
-
-    for (i = INVENTORY_SIZE - 1; i >= 0; i--) {
-        if ((mItems[i].getId() != -1) && (mItems[i].getQuantity() > 0)) {
-            break;
+    for (int i = INVENTORY_SIZE - 1; i >= 0; i--) {
+        if (SlotUsed()(mItems[i])) {
+            return i;
         }
     }
 
-    return --i;
+    return -1;
 }
-- 
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