From: Dirk Lemstra <dirk@git.imagemagick.org>
Date: Sun, 9 Jul 2017 21:32:04 +0000 (+0200)
Subject: Implemented GetBlobSize for a custom stream.
X-Git-Tag: 7.0.6-1~31
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=82e3b7cb8da22a16fc6b1b16d486b5fc40272b5e;p=imagemagick

Implemented GetBlobSize for a custom stream.
---

diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index 2f86648a2..e3cd938d5 100644
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -1518,7 +1518,22 @@ MagickExport MagickSizeType GetBlobSize(const Image *image)
       break;
     }
     case CustomStream:
+    {
+      if ((image->blob->custom_stream->teller != (CustomStreamTeller) NULL) &&
+          (image->blob->custom_stream->seeker != (CustomStreamTeller) NULL))
+        {
+          MagickOffsetType
+            offset;
+
+          offset=image->blob->custom_stream->teller(
+            image->blob->custom_stream->data);
+          extent=image->blob->custom_stream->seeker(0,SEEK_END,
+            image->blob->custom_stream->data);
+          image->blob->custom_stream->seeker(offset,SEEK_SET,
+            image->blob->custom_stream->data);
+        }
       break;
+    }
   }
   return(extent);
 }