Truxton location get when

This retrieves the timestamp, if present, of the location. This corresponds to the [When] column of the [Location] table.

Syntax

uint64_t truxton_location_get_when( uint64_t location_handle );

Parameters

location_handle

This handle comes from calling truxton_location_create() or truxton_child_file_create_location()

Return value

The location's timestamp in FILETIME ticks. If no timestamp is associated with this location, zero is returned.

Sample

void dump_location( uint64_t location_handle )
{
   double value = 0;
   uint64_t ticks = 0;
   char guid_string[ 40 ];
   char label[ 256 ];

   truxton_location_get_label( location_handle, label, sizeof( label ) );
   printf( "%s\n", label );

   truxton_location_get_file_id( location_handle, guid_string, sizeof( guid_string ) );
   printf( "File ID: %s\n", guid_string );

   truxton_location_get_media_id( location_handle, guid_string, sizeof( guid_string ) );
   printf( "Media ID: %s\n", guid_string );

   value = truxton_location_get_latitude( location_handle );
   printf( "Latitude: %lf\n", value );

   value = truxton_location_get_longitude( location_handle );
   printf( "Longitude: %lf\n", value );

   value = truxton_location_get_altitude( location_handle );
   printf( "Altitude: %lf meters\n", value );

   ticks = truxton_location_get_type( location_handle );
   printf( "Type: %" PRIu64 "\n", ticks );

   ticks = truxton_location_get_when( location_handle );
   printf( "Ticks: %" PRIu64 "\n", ticks );
}

The PRIu64 in the sample code above is a standard way of formatting a 64-bit unsigned integer in C. Over the years, different compilers on different operating systems used different format specifiers for things, these PRI macros, along with some tricky string concatenation the compilers perform for you, allow you to maintain a single code base without a bunch of macro magic.