* CGameInterface.h/.cpp moved from client project to lib (and, appropriately, to lib subfolder).

* New files in lib: ResourceSet.h/.cpp -> containing new structure for managing resources logic
* Minor changes and fixes

lib/ResourceSet.cpp

@@ -0,0 +1,91 @@
+#define VCMI_DLL
+#include "ResourceSet.h"
+
+Res::ResourceSet::ResourceSet()
+{
+	resize(RESOURCE_QUANTITY, 0);
+}
+
+bool Res::ResourceSet::nonZero() const
+{
+	for(int i = 0; i < size(); i++)
+		if(at(i))
+			return true;
+
+	return false;
+}
+
+void Res::ResourceSet::amax(const TResource &val)
+{
+	for(int i = 0; i < size(); i++)
+		::amax(at(i), val);
+}
+
+bool Res::ResourceSet::canBeAfforded(const ResourceSet &res) const
+{
+	return Res::canAfford(res, *this);
+}
+
+bool Res::ResourceSet::canAfford(const ResourceSet &price) const
+{
+	return Res::canAfford(*this, price);
+}
+
+bool Res::canAfford(const ResourceSet &res, const ResourceSet &price)
+{
+	assert(res.size() == price.size() && price.size() == RESOURCE_QUANTITY);
+	for(int i = 0; i < RESOURCE_QUANTITY; i++)
+		if(price[i] > res[i])
+			return false;
+
+	return true;
+}
+
+bool Res::ResourceSet::nziterator::valid()
+{
+	return cur.resType < RESOURCE_QUANTITY && cur.resVal;
+}
+
+Res::ResourceSet::nziterator Res::ResourceSet::nziterator::operator++()
+{
+	advance();
+	return *this;
+}
+
+Res::ResourceSet::nziterator Res::ResourceSet::nziterator::operator++(int)
+{
+	nziterator ret = *this;
+	advance();
+	return ret;
+}
+
+const Res::ResourceSet::nziterator::ResEntry& Res::ResourceSet::nziterator::operator*() const
+{
+	return cur;
+}
+
+const Res::ResourceSet::nziterator::ResEntry * Res::ResourceSet::nziterator::operator->() const
+{
+	return &cur;
+}
+
+void Res::ResourceSet::nziterator::advance()
+{
+	do
+	{
+		cur.resType++;
+	} while(cur.resType < RESOURCE_QUANTITY && !(cur.resVal=rs[cur.resType]));
+
+	if(cur.resType >= RESOURCE_QUANTITY)
+		cur.resVal = -1;
+}
+
+Res::ResourceSet::nziterator::nziterator(const ResourceSet &RS)
+	: rs(RS)
+{
+	cur.resType = 0;
+	cur.resVal = rs[0];
+
+	if(!valid())
+		advance();
+}