+
+int ParseYesNo(const std::string & str, bool * val)
+{
+if (0 == strncasecmp(str.c_str(), "yes", 3))
+ {
+ *val = true;
+ return 0;
+ }
+
+if (0 == strncasecmp(str.c_str(), "no", 2))
+ {
+ *val = false;
+ return 0;
+ }
+
+return -1;
+}
+
+int ParseInt(const std::string & str, int * val)
+{
+if (str2x<int>(str, *val))
+ return -1;
+return 0;
+}
+
+int ParseUnsigned(const string & str, unsigned * val)
+{
+if (str2x<unsigned>(str, *val))
+ return -1;
+return 0;
+}
+
+int ParseIntInRange(const string & str, int min, int max, int * val)
+{
+if (ParseInt(str, val) != 0)
+ return -1;
+
+if (*val < min || *val > max)
+ return -1;
+
+return 0;
+}
+
+int ParseUnsignedInRange(const string & str, unsigned min,
+ unsigned max, unsigned * val)
+{
+if (ParseUnsigned(str, val) != 0)
+ return -1;
+
+if (*val < min || *val > max)
+ return -1;
+
+return 0;
+}
+
+bool WaitPackets(int sd)
+{
+fd_set rfds;
+FD_ZERO(&rfds);
+FD_SET(sd, &rfds);
+
+struct timeval tv;
+tv.tv_sec = 0;
+tv.tv_usec = 500000;
+
+int res = select(sd + 1, &rfds, NULL, NULL, &tv);
+if (res == -1) // Error
+ {
+ if (errno != EINTR)
+ printfd(__FILE__, "Error on select: '%s'\n", strerror(errno));
+ return false;
+ }
+
+if (res == 0) // Timeout
+ return false;
+
+return true;
+}