From 8b045ab6264fbd49f2985073115095eacd04f286 Mon Sep 17 00:00:00 2001
From: Leo Yuriev <leo@yuriev.ru>
Date: Tue, 24 Jan 2017 15:38:20 +0300
Subject: [PATCH] mdbx: MDBX_EMULTIVAL errcode for libfpta.

---
 mdb.c  | 2 +-
 mdbx.c | 2 +-
 mdbx.h | 2 ++
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/mdb.c b/mdb.c
index 08dccaaa..f9a3737a 100644
--- a/mdb.c
+++ b/mdb.c
@@ -9254,7 +9254,7 @@ mdb_put(MDB_txn *txn, MDB_dbi dbi,
 			MDB_node *leaf = NODEPTR(mc.mc_pg[mc.mc_top], mc.mc_ki[mc.mc_top]);
 			if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
 				mdb_tassert(txn, XCURSOR_INITED(&mc) && mc.mc_xcursor->mx_db.md_entries > 1);
-				rc = MDB_KEYEXIST;
+				rc = MDBX_EMULTIVAL;
 			}
 		}
 	}
diff --git a/mdbx.c b/mdbx.c
index 611a87e9..6e3cb210 100644
--- a/mdbx.c
+++ b/mdbx.c
@@ -468,7 +468,7 @@ int mdbx_replace(MDB_txn *txn, MDB_dbi dbi,
 					MDB_node *leaf = NODEPTR(page, mc.mc_ki[mc.mc_top]);
 					if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
 						mdb_tassert(txn, XCURSOR_INITED(&mc) && mc.mc_xcursor->mx_db.md_entries > 1);
-						rc = MDB_KEYEXIST;
+						rc = MDBX_EMULTIVAL;
 						goto bailout;
 					}
 					/* если данные совпадают, то ничего делать не надо */
diff --git a/mdbx.h b/mdbx.h
index 7fd09d67..83315e54 100644
--- a/mdbx.h
+++ b/mdbx.h
@@ -223,6 +223,8 @@ size_t mdbx_canary_get(MDB_txn *txn, mdbx_canary* canary);
  * 0 otherwise or less that zero in error case. */
 int mdbx_cursor_eof(MDB_cursor *mc);
 
+#define MDBX_EMULTIVAL (MDB_LAST_ERRCODE - 42)
+
 int mdbx_replace(MDB_txn *txn, MDB_dbi dbi,
 	MDB_val *key, MDB_val *new_data, MDB_val *old_data, unsigned flags);
 /* Same as mdbx_get(), but also return the count