usrp: remove gregorian and lexical casting in gps_ctrl

1 files changed, 14 insertions, 12 deletions

diff --git a/host/lib/usrp/gps_ctrl.cpp b/host/lib/usrp/gps_ctrl.cpp
index cc3e1b8e3..c1cdadd23 100644
--- a/host/lib/usrp/gps_ctrl.cpp
+++ b/host/lib/usrp/gps_ctrl.cpp
@@ -23,17 +23,17 @@
 #include <boost/algorithm/string.hpp>
 #include <boost/assign/list_of.hpp>
 #include <stdint.h>
-#include <boost/date_time/posix_time/posix_time.hpp>
 #include <boost/thread/thread.hpp>
 #include <boost/tokenizer.hpp>
 #include <boost/format.hpp>
 #include <boost/regex.hpp>
 #include <boost/thread/mutex.hpp>
+#include <ctime>
+#include <string>
 
 #include "boost/tuple/tuple.hpp"
 
 using namespace uhd;
-using namespace boost::gregorian;
 using namespace boost::posix_time;
 using namespace boost::algorithm;
 using namespace boost::this_thread;
@@ -348,16 +348,18 @@ private:
                 throw uhd::value_error(str(boost::format("Invalid response \"%s\"") % reply));
             }
 
-            //just trust me on this one
-            gps_time = ptime( date(
-                             greg_year(boost::lexical_cast<int>(datestr.substr(4, 2)) + 2000),
-                             greg_month(boost::lexical_cast<int>(datestr.substr(2, 2))),
-                             greg_day(boost::lexical_cast<int>(datestr.substr(0, 2)))
-                           ),
-                          hours(  boost::lexical_cast<int>(timestr.substr(0, 2)))
-                        + minutes(boost::lexical_cast<int>(timestr.substr(2, 2)))
-                        + seconds(boost::lexical_cast<int>(timestr.substr(4, 2)))
-                     );
+            time_t raw_time =  std::time(nullptr);
+            struct tm *raw_date = std::gmtime(&raw_time); // Initialize tm struct
+            raw_date->tm_year = std::stoi(datestr.substr(4, 2)) + 2000 - 1900; // years since 1900
+            raw_date->tm_mon = std::stoi(datestr.substr(2, 2)) - 1; // months since january (0-11)
+            raw_date->tm_mday = std::stoi(datestr.substr(0, 2)); // dom (1-31)
+            raw_date->tm_hour = std::stoi(timestr.substr(0, 2));
+            raw_date->tm_min = std::stoi(timestr.substr(2, 2));
+            raw_date->tm_sec = std::stoi(timestr.substr(4,2));
+            std::time_t gps_date = mktime(raw_date) - timezone; // mktime creates time_t in localtime
+
+            gps_time = boost::posix_time::from_time_t(gps_date);
+
             return gps_time;
 
         } catch(std::exception &e) {