Add basic UTF-8 type

Author: kmilos

include/exiv2/types.hpp

@@ -84,6 +84,7 @@ enum TypeId {
   unsignedLongLong = 16,    //!< Exif LONG LONG type, 64-bit (8-byte) unsigned integer.
   signedLongLong = 17,      //!< Exif LONG LONG type, 64-bit (8-byte) signed integer.
   tiffIfd8 = 18,            //!< TIFF IFD type, 64-bit (8-byte) unsigned integer.
+  utf8String = 129,         //!< Exif UTF-8 type, 8-bit byte.
   string = 0x10000,         //!< IPTC string type.
   date = 0x10001,           //!< IPTC date type.
   time = 0x10002,           //!< IPTC time type.

src/image.cpp

@@ -141,7 +141,7 @@ void Image::printStructure(std::ostream&, PrintStructureOption, size_t /*depth*/
 
 bool Image::isStringType(uint16_t type) {
   return type == Exiv2::asciiString || type == Exiv2::unsignedByte || type == Exiv2::signedByte ||
-         type == Exiv2::undefined;
+         type == Exiv2::undefined || type == Exiv2::utf8String;
 }
 bool Image::isShortType(uint16_t type) {
   return type == Exiv2::unsignedShort || type == Exiv2::signedShort;
@@ -314,6 +314,9 @@ const char* Image::typeName(uint16_t tag) {
     case Exiv2::tiffIfd:
       result = "IFD";
       break;
+    case Exiv2::utf8String:
+      result = "UTF-8";
+      break;
     default:
       result = "unknown";
       break;

src/types.cpp

@@ -51,6 +51,7 @@ constexpr struct TypeInfoTable {
     {Exiv2::tiffFloat, "Float", 4},
     {Exiv2::tiffDouble, "Double", 8},
     {Exiv2::tiffIfd, "Ifd", 4},
+    {Exiv2::utf8String, "Utf-8", 1},
     {Exiv2::string, "String", 1},
     {Exiv2::date, "Date", 8},
     {Exiv2::time, "Time", 11},