Added error codes from src/error.cpp into an enumeration

include/exiv2/error.hpp

@@ -192,6 +192,74 @@ namespace Exiv2 {
         return os << error.what();
     }
 
+    //! Complete list of all Exiv2 error codes
+    enum ErrorCode {
+        kerGeneralError = -1,
+        kerSuccess = 0,
+        kerErrorMessage,
+        kerCallFailed,
+        kerNotAnImage,
+        kerInvalidDataset,
+        kerInvalidRecord,
+        kerInvalidKey,
+        kerInvalidTag,
+        kerValueNotSet,
+        kerDataSourceOpenFailed,
+        kerFileOpenFailed,
+        kerFileContainsUnknownImageType,
+        kerMemoryContainsUnknownImageType,
+        kerUnsupportedImageType,
+        kerFailedToReadImageData,
+        kerNotAJpeg,
+        kerFailedToMapFileForReadWrite,
+        kerFileRenameFailed,
+        kerTransferFailed,
+        kerMemoryTransferFailed,
+        kerInputDataReadFailed,
+        kerImageWriteFailed,
+        kerNoImageInInputData,
+        kerInvalidIfdId,
+        //! Entry::setValue: Value too large
+        kerValueTooLarge,
+        //! Entry::setDataArea: Value too large
+        kerDataAreaValueTooLarge,
+        kerOffsetOutOfRange,
+        kerUnsupportedDataAreaOffsetType,
+        kerInvalidCharset,
+        kerUnsupportedDateFormat,
+        kerUnsupportedTimeFormat,
+        kerWritingImageFormatUnsupported,
+        kerInvalidSettingForImage,
+        kerNotACrwImage,
+        kerFunctionNotSupported,
+        kerNoNamespaceInfoForXmpPrefix,
+        kerNoPrefixForNamespace,
+        kerTooLargeJpegSegment,
+        kerUnhandledXmpdatum,
+        kerUnhandledXmpNode,
+        kerXMPToolkitError,
+        kerDecodeLangAltPropertyFailed,
+        kerDecodeLangAltQualifierFailed,
+        kerEncodeLangAltPropertyFailed,
+        kerPropertyNameIdentificationFailed,
+        kerSchemaNamespaceNotRegistered,
+        kerNoNamespaceForPrefix,
+        kerAliasesNotSupported,
+        kerInvalidXmpText,
+        kerTooManyTiffDirectoryEntries,
+        kerMultipleTiffArrayElementTagsInDirectory,
+        kerWrongTiffArrayElementTagType,
+        kerInvalidKeyXmpValue,
+        kerInvalidIccProfile,
+        kerInvalidXMP,
+        kerTiffDirectoryTooLarge,
+        kerInvalidTypeValue,
+        kerInvalidMalloc,
+        kerCorruptedMetadata,
+        kerArithmeticOverflow,
+        kerMallocFailed,
+    };
+
     /*!
       @brief Simple error class used for exceptions. An output operator is
              provided to print errors to a stream.