From ab4597cedc0634b088525b9d00d72aa37f532e76 Mon Sep 17 00:00:00 2001
From: Leo Yuriev <leo@yuriev.ru>
Date: Fri, 31 Mar 2017 17:59:12 +0300
Subject: [PATCH] mdbx: add MDBX_MAXDATASIZE.

---
 mdbx.h     |  4 ++++
 src/mdbx.c | 14 +-------------
 2 files changed, 5 insertions(+), 13 deletions(-)

diff --git a/mdbx.h b/mdbx.h
index 594e488c..2d30b2b8 100644
--- a/mdbx.h
+++ b/mdbx.h
@@ -225,6 +225,10 @@ typedef struct iovec MDB_val;
 #define mv_size iov_len
 #define mv_data iov_base
 
+/* The maximum size of a data item.
+ * MDBX only store a 32 bit value for node sizes. */
+#define MDBX_MAXDATASIZE INT32_MAX
+
 /* A callback function used to compare two keys in a database */
 typedef int(MDB_cmp_func)(const MDB_val *a, const MDB_val *b);
 
diff --git a/src/mdbx.c b/src/mdbx.c
index 552a424f..384ecfda 100644
--- a/src/mdbx.c
+++ b/src/mdbx.c
@@ -317,12 +317,6 @@ txnid_t mdbx_debug_edge;
 /**	The version number for a database's lockfile format. */
 #define MDB_LOCK_VERSION ((MDB_DEVEL) ? 999 : 1)
 
-/**	@brief The maximum size of a data item.
- *
- *	We only store a 32 bit value for node sizes.
- */
-#define MAXDATASIZE 0xffffffffUL
-
 #define DKBUF_MAXKEYSIZE 511 /* FIXME */
                              /**	Key size which fits in a #DKBUF.
                               *	@ingroup debug
@@ -5618,16 +5612,10 @@ int mdbx_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data,
   if (unlikely(key->mv_size > env->me_maxkey_limit))
     return MDB_BAD_VALSIZE;
 
-#if SIZE_MAX > MAXDATASIZE
   if (unlikely(data->mv_size > ((mc->mc_db->md_flags & MDB_DUPSORT)
                                     ? env->me_maxkey_limit
-                                    : MAXDATASIZE)))
+                                    : MDBX_MAXDATASIZE)))
     return MDB_BAD_VALSIZE;
-#else
-  if ((mc->mc_db->md_flags & MDB_DUPSORT) &&
-      unlikely(data->mv_size > env->me_maxkey_limit))
-    return MDB_BAD_VALSIZE;
-#endif
 
   if ((mc->mc_db->md_flags & MDB_INTEGERKEY) &&
       unlikely(key->mv_size != sizeof(uint32_t) &&