1 files changed, 35 insertions, 0 deletions
diff --git a/src/jpeg-utils.cpp b/src/jpeg-utils.cpp
index 031ecc0..389b8e4 100644
--- a/src/jpeg-utils.cpp
+++ b/src/jpeg-utils.cpp
@@ -197,6 +197,41 @@ get_exif_data_fixed (ExifData *exif, const gchar *key)
   return get_exif_data (exif, key);
 }
 
+/*
+ *   Returns TRUE if the image contains the key specified
+ */
+gboolean
+exif_has_key (ExifData *exif, const gchar *key)
+{
+  g_return_val_if_fail (exif != NULL, FALSE);
+  g_return_val_if_fail (key != NULL, FALSE);
+
+  try {
+    if (g_strcmp0 (key, JPEG_COMMENT) == 0) {
+      return (! exif->image->comment().empty());
+    }
+
+    if (g_str_has_prefix (key, "Exif.")) {
+      Exiv2::ExifData &exifData = exif->image->exifData();
+      if (! exifData.empty()) {
+        return (! exifData[key].toString().empty());
+      }
+    }
+
+    if (g_str_has_prefix (key, "Iptc.")) {
+      Exiv2::IptcData &iptcData = exif->image->iptcData();
+      if (! iptcData.empty()) {
+        return (! iptcData[key].toString().empty());
+      }
+    }
+
+    return FALSE;
+  }
+  catch (...) {
+    return FALSE;
+  }
+}
+
 
 static void
 autorotate_image (MagickWand *magick_wand)