Modified recvAllNB() to return an empty string (instead of NULL) if there is nothing to read

includes/sock.hpp

@@ -49,7 +49,8 @@ public:
 	/* Method to receive data sent to the 'other_socket' socket */
 	char* recvAll();
 
-	/* Non-blocking receive method - calls the method above after polling for data */
+	/* Non-blocking receive method - calls the method above after polling for data. Returns
+	an empty string if there is nothing to read. */
 	char* recvAllNB();
 
 	/* Returns socket identifier */

sock.cpp

@@ -81,7 +81,7 @@ This function also needs more testing for TCP. */
 char* Sock::recvAll() {
 	int num_bytes_received = 0;
 	int total_bytes_received = 0;
-	char* buffer = (char *)malloc(100);
+	char* buffer = (char *)malloc(150);
 	bool has_been_read = false;
 
 	if (this->protocol == ES_UDP) {
@@ -117,7 +117,8 @@ char* Sock::recvAll() {
 	return buffer;
 }
 
-/* Non-blocking recv call - Uses 'select' to poll for data from the FD. */
+/* Non-blocking recv call - Uses 'select' to poll for data from the FD. Returns an empty string if there
+is nothing to read. */
 char* Sock::recvAllNB() {
 	struct timeval tv;
 	fd_set readfs;
@@ -131,7 +132,7 @@ char* Sock::recvAllNB() {
 	if (FD_ISSET(this->sock_fd, &readfs)) {
 		return Sock::recvAll();
 	} else {
-		return NULL;
+		return (char *)"";
 	}
 }