[feat] add support for the blob interfacedevelop

Pysqlcipher support for the sqlite blob interface:
https://sqlite.org/c3ref/blob_open.html

Copying the code from the PR in pysqlite:
https://github.com/ghaering/pysqlite/pull/93

1 files changed, 2 insertions, 1 deletions

diff --git a/src/connection.h b/src/connection.h
index 3fc5a70..a110ea2 100644
--- a/src/connection.h
+++ b/src/connection.h
@@ -70,9 +70,10 @@ typedef struct
 
     pysqlite_Cache* statement_cache;
 
-    /* Lists of weak references to statements and cursors used within this connection */
+    /* Lists of weak references to statements, blobs and cursors used within this connection */
     PyObject* statements;
     PyObject* cursors;
+    PyObject* blobs;
 
     /* Counters for how many statements/cursors were created in the connection. May be
      * reset to 0 at certain intervals */