Add 'inspect' command that writes contracts to file

eth/main.cpp

@@ -83,6 +83,7 @@ void interactiveHelp()
         << "    balance  Gives the current balance." << endl
         << "    transact <secret> <dest> <amount>  Executes a given transaction." << endl
         << "    send <dest> <amount>  Executes a given transaction with current secret." << endl
+        << "    inspect <contract> Dumps a contract to <APPDATA>/<contract>.evm." << endl
         << "    exit  Exits the application." << endl;
 }
 
@@ -288,6 +289,62 @@ int main(int argc, char** argv)
 				Address dest = h160(fromHex(rechex));
 				c.transact(us.secret(), dest, amount);
 			}
+			else if (cmd == "inspect")
+			{
+				string rechex;
+				iss >> rechex;
+
+				c.lock();
+				auto hba = h160(fromHex(rechex));
+				auto h = h160((byte const*)hba.data(), h160::ConstructFromPointer);
+
+				stringstream s;
+				auto mem = c.state().contractMemory(h);
+				u256 next = 0;
+				unsigned numerics = 0;
+				bool unexpectedNumeric = false;
+				for (auto i: mem)
+				{
+					if (next < i.first)
+					{
+						unsigned j;
+						for (j = 0; j <= numerics && next + j < i.first; ++j)
+							s << (j < numerics || unexpectedNumeric ? " 0" : " STOP");
+						unexpectedNumeric = false;
+						numerics -= min(numerics, j);
+						if (next + j < i.first)
+							s << "\n@" << showbase << hex << i.first << "    ";
+					}
+					else if (!next)
+					{
+						s << "@" << showbase << hex << i.first << "    ";
+					}
+					auto iit = c_instructionInfo.find((Instruction)(unsigned)i.second);
+					if (numerics || iit == c_instructionInfo.end() || (u256)(unsigned)iit->first != i.second)	// not an instruction or expecting an argument...
+					{
+						if (numerics)
+							numerics--;
+						else
+							unexpectedNumeric = true;
+						s << " " << showbase << hex << i.second;
+					}
+					else
+					{
+						auto const& ii = iit->second;
+						s << " " << ii.name;
+						numerics = ii.additional;
+					}
+					next = i.first + 1;
+				}
+
+				string outFile = getDataDir() + "/" + rechex + ".evm";
+				ofstream ofs;
+				ofs.open(outFile, ofstream::binary);
+				ofs.write(s.str().c_str(), s.str().length());
+				ofs.close();
+
+				c.unlock();
+			}
 			else if (cmd == "help")
 			{
 				interactiveHelp();