gauge timestamp and use optional .tdx path in cython

example.py

@@ -6,8 +6,9 @@ tdmpath = b"samples/SineData.tdm"
 tdxpath = b"samples/SineData.tdx"
 
 # create instance of ripper class
-RP = tdm_ripper.pytdmripper(tdmpath)
-RP = tdm_ripper.pytdmripper(b"/Users/mariofink/git/Conti_HBS/data_science/python/features/tdm_tmp_slow/75_1/Messung.tdm")
+# RP = tdm_ripper.pytdmripper(tdmpath)
+RP = tdm_ripper.pytdmripper(tdmpath,tdxpath)
+# RP = tdm_ripper.pytdmripper(b"/Users/mariofink/git/Conti_HBS/data_science/python/features/tdm_tmp_slow/75_1/Messung.tdm")
 
 # provide overview of available channels
 RP.show_channels()
@@ -19,7 +20,7 @@ for i in range(0,RP.num_groups()):
     print(str(i+1).rjust(10)+str(RP.no_channels(i)).rjust(10))
 
 # print particular channel to file
-# RP.print_channel(1,b"SineData_extract.dat")
+RP.print_channel(1,b"SineData_extract.dat")
 
 # extract channel and return it to numpy array
 # channels = RP.get_channel(1)

lib/tdm_ripper.cpp

@@ -61,6 +61,10 @@ tdm_ripper::tdm_ripper(std::string tdmfile, std::string tdxfile, bool neglect_em
 
   // open .tdx and stream all binary data into vector
   std::ifstream fin(tdxfile_.c_str(),std::ifstream::binary);
+  assert( fin.good() && "failed to open .tdx-file" );
+  if ( !fin.good() ) std::cout<<"failed to open .tdx-file\n\n";
+  // assert( errno == 0 );
+  // std::cout<<"error code "<<strerror(errno)<<"\n\n";
   std::vector<unsigned char> tdxbuf((std::istreambuf_iterator<char>(fin)),
                                     (std::istreambuf_iterator<char>()));
   tdxbuf_ = tdxbuf;
@@ -123,7 +127,8 @@ void tdm_ripper::parse_structure()
           }
           else
           {
-            assert ( false && "unexpected attribute name" );
+            startstop.first = "";
+            startstop.second = "";
           }
         }
         group_timestamp_.push_back(startstop);
@@ -306,14 +311,17 @@ void tdm_ripper::list_channels(std::ostream& gout, int width, int maxshow)
 
 void tdm_ripper::list_groups(std::ostream& gout, int width, int maxshow)
 {
+  // if present, show timestamps
+  bool showts = ( group_timestamp_[0].first.compare("") != 0 );
+
   gout<<std::setw(width)<<"group";
   gout<<std::setw(width)<<"group id";
   gout<<std::setw(width)<<"group name";
   gout<<std::setw(width)<<"num channels";
-  gout<<std::setw(2*width)<<"start time";
-  gout<<std::setw(2*width)<<"stop time";
+  if ( showts ) gout<<std::setw(2*width)<<"start time";
+  if ( showts ) gout<<std::setw(2*width)<<"stop time";
   gout<<"\n";
-  gout<<std::setfill('-')<<std::setw(8*width+1)<<"\n";
+  gout<<std::setfill('-')<<(showts?std::setw(8*width+1):std::setw(4*width+1))<<"\n";
   gout<<std::setfill(' ');
 
   for ( int i = 0; i < num_groups_ && i < maxshow; i++ )
@@ -322,8 +330,8 @@ void tdm_ripper::list_groups(std::ostream& gout, int width, int maxshow)
     gout<<std::setw(width)<<group_id_[i];
     gout<<std::setw(width)<<group_name_[i];
     gout<<std::setw(width)<<num_channels_group_[i];
-    gout<<std::setw(2*width)<<time_stamp(i,true);
-    gout<<std::setw(2*width)<<time_stamp(i,false);
+    if ( showts ) gout<<std::setw(2*width)<<time_stamp(i,true);
+    if ( showts ) gout<<std::setw(2*width)<<time_stamp(i,false);
     gout<<"\n";
   }
   gout<<"\n\n";
@@ -336,8 +344,8 @@ void tdm_ripper::list_groups(std::ostream& gout, int width, int maxshow)
       gout<<std::setw(width)<<group_id_[i];
       gout<<std::setw(width)<<group_name_[i];
       gout<<std::setw(width)<<num_channels_group_[i];
-      gout<<std::setw(2*width)<<time_stamp(i,true);
-      gout<<std::setw(2*width)<<time_stamp(i,false);
+      if ( showts ) gout<<std::setw(2*width)<<time_stamp(i,true);
+      if ( showts ) gout<<std::setw(2*width)<<time_stamp(i,false);
       gout<<"\n";
     }
     gout<<"\n\n";

lib/tdm_ripper.hpp

@@ -249,14 +249,15 @@ public:
   }
 
   // evtl. get group time_stamp of .tdm file given in unix format
-  std::string unix_timestamp(std::string unixts)
+  static std::string unix_timestamp(std::string unixts)
   {
     // average year of Gregorian calender
-    const double avgdaysofyear = 365 + 1./4 - 1./100 + 1./400;
+    const double avgdaysofyear = 365.0 + 1./4 - 1./100 + 1./400
+                                 - 8./24561; // gauge timestamp according to DIADEM result
 
     // convert string to long int = number of second since 0000/01/01 00:00
     long int ts = atol(unixts.c_str());
-    assert( ts > 0 );
+    assert( ts >= 0 );
 
     // use STL to convert timestamp (epoch usually starts from 01.01.1970)
     std::time_t tstime = ts - 1970*avgdaysofyear*86400;

main.cpp

@@ -28,6 +28,11 @@ int main(int argc, char* argv[])
   ripper.list_channels(fout);
   fout.close();
 
+  // long int nsa = 6.3636349745e10; // expected result: 22.07.2016, 19:49:05
+  // long int nsb = 6.3636350456e10;
+  // std::string ts = std::to_string(nsa);
+  // std::cout<<ripper.unix_timestamp(ts)<<"\n";
+
   std::cout<<"number of channels "<<ripper.num_channels()<<"\n";
   std::cout<<"number of groups "<<ripper.num_groups()<<"\n\n";
 

pytdm_ripper.pyx

@@ -7,8 +7,8 @@ cdef class pytdmripper:
     # pointer to C++ instance (since there's no nullary constructor)
     cdef tdm_ripper *cripp
 
-    def __cinit__(self, string tdmfile):
-        self.cripp = new tdm_ripper(tdmfile)
+    def __cinit__(self, string tdmfile, string tdxfile = b""):
+        self.cripp = new tdm_ripper(tdmfile,tdxfile)
 
     def __dealloc__(self):
         del self.cripp

tdm_ripper.pxd

@@ -11,7 +11,7 @@ cdef extern from "tdm_ripper.cpp":
 
 cdef extern from "tdm_ripper.hpp":
     cdef cppclass tdm_ripper:
-        tdm_ripper(string) except +
+        tdm_ripper(string,string) except +
         void list_channels()
         void list_groups()
         int num_channels()