From 341371f1ac26af555407bf9fe9b78794297a385b Mon Sep 17 00:00:00 2001
From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Thu, 9 Aug 2012 16:19:36 +0200
Subject: [PATCH] added Inventory class

---
 Debug/src/common/subdir.mk   |  3 ++
 Release/src/common/subdir.mk |  3 ++
 src/common/Inventory.cpp     | 64 ++++++++++++++++++++++++++++++++++++
 src/common/Inventory.h       | 50 ++++++++++++++++++++++++++++
 4 files changed, 120 insertions(+)
 create mode 100644 src/common/Inventory.cpp
 create mode 100644 src/common/Inventory.h

diff --git a/Debug/src/common/subdir.mk b/Debug/src/common/subdir.mk
index 44a8678..a4e6c46 100644
--- a/Debug/src/common/subdir.mk
+++ b/Debug/src/common/subdir.mk
@@ -4,12 +4,15 @@
 
 # Add inputs and outputs from these tool invocations to the build variables 
 CPP_SRCS += \
+../src/common/Inventory.cpp \
 ../src/common/Item.cpp 
 
 OBJS += \
+./src/common/Inventory.o \
 ./src/common/Item.o 
 
 CPP_DEPS += \
+./src/common/Inventory.d \
 ./src/common/Item.d 
 
 
diff --git a/Release/src/common/subdir.mk b/Release/src/common/subdir.mk
index f4da71e..6ee13bc 100644
--- a/Release/src/common/subdir.mk
+++ b/Release/src/common/subdir.mk
@@ -4,12 +4,15 @@
 
 # Add inputs and outputs from these tool invocations to the build variables 
 CPP_SRCS += \
+../src/common/Inventory.cpp \
 ../src/common/Item.cpp 
 
 OBJS += \
+./src/common/Inventory.o \
 ./src/common/Item.o 
 
 CPP_DEPS += \
+./src/common/Inventory.d \
 ./src/common/Item.d 
 
 
diff --git a/src/common/Inventory.cpp b/src/common/Inventory.cpp
new file mode 100644
index 0000000..d118f21
--- /dev/null
+++ b/src/common/Inventory.cpp
@@ -0,0 +1,64 @@
+/*
+ * Inventory.cpp
+ *
+ *  Created on: Aug 9, 2012
+ *      Author: holy
+ */
+
+#include "Inventory.h"
+
+namespace common {
+
+Inventory::Inventory() {
+
+}
+
+bool Inventory::Add(const Item *item, int count) {
+	if (count > 99) return false;
+
+	Entry *entry(FindItem(item));
+	if (entry) {
+		if (entry->count + count > 99) {
+			return false;
+		} else {
+			entry->count += count;
+			return true;
+		}
+	} else {
+		for (int i(0); i < MaxItems(); ++i) {
+			if (SloteFree(i)) {
+				entries[i].item = item;
+				entries[i].count = count;
+				return true;
+			}
+		}
+		return false;
+	}
+}
+
+void Inventory::Remove(const Item *item, int count) {
+	Entry *entry(FindItem(item));
+	if (!entry) return;
+
+	if (entry->count <= count) {
+		entry->item = 0;
+		entry->count = 0;
+	} else {
+		entry->count -= count;
+	}
+}
+
+Inventory::Entry *Inventory::FindItem(const Item *item) {
+	for (int i(0); i < MaxItems(); ++i) {
+		if (item == ItemAt(i)) {
+			return entries + i;
+		}
+	}
+	return 0;
+}
+
+bool Inventory::SloteFree(int offset) const {
+	return !ItemAt(offset);
+}
+
+}
diff --git a/src/common/Inventory.h b/src/common/Inventory.h
new file mode 100644
index 0000000..2443078
--- /dev/null
+++ b/src/common/Inventory.h
@@ -0,0 +1,50 @@
+/*
+ * Inventory.h
+ *
+ *  Created on: Aug 9, 2012
+ *      Author: holy
+ */
+
+#ifndef COMMON_INVENTORY_H_
+#define COMMON_INVENTORY_H_
+
+#include <SDL.h>
+
+namespace common {
+
+class Item;
+
+class Inventory {
+
+public:
+	Inventory();
+
+public:
+	bool Add(const Item *, int count = 1);
+	void Remove(const Item *, int count = 1);
+
+	int MaxItems() const { return 96; }
+
+	const Item *ItemAt(int offset) const { return entries[offset].item; }
+	int ItemCountAt(int offset) const { return entries[offset].count; }
+
+private:
+	struct Entry {
+		Entry() : item(0), count(0) { }
+		const Item *item;
+		Uint8 count;
+	};
+
+private:
+	Entry *FindItem(const Item *);
+	const Entry *FindItem(const Item *) const;
+	bool SloteFree(int offset) const;
+
+private:
+	Entry entries[96];
+
+};
+
+}
+
+#endif /* COMMON_INVENTORY_H_ */
-- 
2.39.2