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mdbx: adds mdbx_cursor_eof() for libfpta.

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This commit is contained in:
Leo Yuriev 2016-12-06 20:32:09 +03:00
parent f9f132671c
commit b980878b07
2 changed files with 15 additions and 0 deletions
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11
mdbx.c
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@ -352,3 +352,14 @@ size_t mdbx_canary_get(MDB_txn *txn, mdbx_canary* canary)
return txn->mt_txnid;
}
int mdbx_cursor_eof(MDB_cursor *mc)
{
if (unlikely(mc == NULL))
return EINVAL;
if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE))
return MDB_VERSION_MISMATCH;
return (mc->mc_flags & (C_INITIALIZED | C_EOF)) != C_INITIALIZED ? 1 : 0;
}

4
mdbx.h
View File

@ -219,6 +219,10 @@ typedef struct mdbx_canary {
int mdbx_canary_put(MDB_txn *txn, const mdbx_canary* canary);
size_t mdbx_canary_get(MDB_txn *txn, mdbx_canary* canary);
/** Returns 1 when no more data available or cursor not positioned,
* 0 otherwise or less that zero in error case. */
int mdbx_cursor_eof(MDB_cursor *mc);
/** @} */
#ifdef __cplusplus