neth: use streams for inputs

neth/main.cpp

@@ -564,9 +564,18 @@ int main(int argc, char** argv)
 				fields[4].erase(std::remove(fields[4].begin(), fields[4].end(), ' '), fields[4].end());
 				fields[5].erase(std::find_if(fields[5].rbegin(), fields[5].rend(), std::bind1st(std::not_equal_to<char>(), ' ')).base(), fields[5].end());
 				int size = fields[0].length();
-				u256 amount = atoll(fields[1].c_str());
-				u256 gasPrice = atoll(fields[2].c_str());
-				u256 gas = atoll(fields[3].c_str());
+				u256 amount;
+				u256 gasPrice;
+				u256 gas;
+				stringstream ssa;
+				ssa << fields[1];
+				ssa >> amount;
+				stringstream ssg;
+				ssg << fields[3];
+				ssg >> gas;
+				stringstream ssp;
+				ssp << fields[2];
+				ssp >> gasPrice;
 				string sechex = fields[4];
 				string sdata = fields[5];
 				cnote << "Data:";
@@ -623,7 +632,10 @@ int main(int argc, char** argv)
 			{
 				fields[0].erase(std::remove(fields[0].begin(), fields[0].end(), ' '), fields[0].end());
 				int size = fields[0].length();
-				u256 amount = atoll(fields[1].c_str());
+				u256 amount;
+				stringstream sss;
+				sss << fields[1];
+				sss >> amount;
 				if (size < 40)
 				{
 					if (size > 0)
@@ -661,9 +673,18 @@ int main(int argc, char** argv)
 			}
 			else
 			{
-				u256 endowment = atoll(fields[0].c_str());
-				u256 gas = atoll(fields[2].c_str());
-				u256 gasPrice = atoll(fields[1].c_str());
+				u256 endowment;
+				u256 gas;
+				u256 gasPrice;
+				stringstream sse;
+				sse << fields[0];
+				sse >> endowment;
+				stringstream ssg;
+				ssg << fields[2];
+				ssg >> gas;
+				stringstream ssp;
+				ssp << fields[1];
+				ssp >> gasPrice;
 				if (endowment < 0)
 					cwarn << "Invalid endowment";
 				else if (gasPrice < c_minGasPrice)