Added pretty-print function for GPSTimeStamp

src/tags.cpp

@@ -528,7 +528,7 @@ namespace Exiv2 {
         TagInfo(0x0004, "GPSLongitude", "GPSLongitude", "Longitude", gpsIfdId, gpsTags, unsignedRational, printDegrees),
         TagInfo(0x0005, "GPSAltitudeRef", "GPSAltitudeRef", "Altitude reference", gpsIfdId, gpsTags, unsignedByte, EXV_PRINT_TAG(exifGPSAltitudeRef)),
         TagInfo(0x0006, "GPSAltitude", "GPSAltitude", "Altitude", gpsIfdId, gpsTags, unsignedRational, print0x0006),
-        TagInfo(0x0007, "GPSTimeStamp", "GPSTimeStamp", "GPS time (atomic clock)", gpsIfdId, gpsTags, unsignedRational, printValue),
+        TagInfo(0x0007, "GPSTimeStamp", "GPSTimeStamp", "GPS time (atomic clock)", gpsIfdId, gpsTags, unsignedRational, print0x0007),
         TagInfo(0x0008, "GPSSatellites", "GPSSatellites", "GPS satellites used for measurement", gpsIfdId, gpsTags, asciiString, printValue),
         TagInfo(0x0009, "GPSStatus", "GPSStatus", "GPS receiver status", gpsIfdId, gpsTags, asciiString, printValue),
         TagInfo(0x000a, "GPSMeasureMode", "GPSMeasureMode", "GPS measurement mode", gpsIfdId, gpsTags, asciiString, printValue),
@@ -1087,6 +1087,35 @@ namespace Exiv2 {
         return os;
     }
 
+    std::ostream& print0x0007(std::ostream& os, const Value& value)
+    {
+        if (value.count() == 3) {
+            std::ostringstream oss;
+            oss.copyfmt(os);
+            const float sec = 3600 * value.toFloat(0) 
+                              + 60 * value.toFloat(1) 
+                              + value.toFloat(2);
+            int p = 0;
+            if (sec != static_cast<int>(sec)) p = 1;
+
+            const int hh = static_cast<int>(sec / 3600);
+            const int mm = static_cast<int>((sec - 3600 * hh) / 60);
+            const float ss = sec - 3600 * hh - 60 * mm;
+
+            os << std::setw(2) << std::setfill('0') << std::right << hh << ":" 
+               << std::setw(2) << std::setfill('0') << std::right << mm << ":"
+               << std::setw(2 + p * 2) << std::setfill('0') << std::right 
+               << std::fixed << std::setprecision(p) << ss;
+
+            os.copyfmt(oss);
+        }
+        else {
+            os << value;
+        }
+
+        return os;
+    }
+
     std::ostream& print0x8298(std::ostream& os, const Value& value)
     {
         // Print the copyright information in the format Photographer, Editor

src/tags.hpp

@@ -437,6 +437,8 @@ namespace Exiv2 {
 
     //! Print GPS altitude
     std::ostream& print0x0006(std::ostream& os, const Value& value);
+    //! Print GPS timestamp
+    std::ostream& print0x0007(std::ostream& os, const Value& value);
     //! Print the copyright
     std::ostream& print0x8298(std::ostream& os, const Value& value);
     //! Print the exposure time