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mdbx: add key-to-value functions.

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Change-Id: Ie0acd8c58833047931444fd9d94d5b82e6d541bb
This commit is contained in:
Leonid Yuriev
2020-06-23 23:50:37 +03:00
parent 63bf01a60a
commit 428f753c03
2 changed files with 102 additions and 20 deletions
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9
mdbx.h
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@@ -2681,7 +2681,7 @@ LIBMDBX_API int mdbx_dbi_open_ex(MDBX_txn *txn, const char *name,
LIBMDBX_API int mdbx_dbi_open(MDBX_txn *txn, const char *name, unsigned flags,
MDBX_dbi *dbi);
/* Key-making functions to avoid custom comparators.
/* Key-making (value-to-key) functions to avoid custom comparators.
*
* The mdbx_key_from_jsonInteger() build key which are comparable with
* keys created by mdbx_key_from_double(). So this allow mix int64 and IEEE754
@@ -2700,6 +2700,13 @@ __inline uint32_t mdbx_key_from_int32(const int32_t i32) {
return UINT32_C(0x80000000) + i32;
}
/* Key-reverse (key-to-value) functions to avoid custom comparators. */
LIBMDBX_API int64_t mdbx_jsonInteger_from_key(const MDBX_val);
LIBMDBX_API double mdbx_double_from_key(const MDBX_val);
LIBMDBX_API float mdbx_float_from_key(const MDBX_val);
LIBMDBX_API int32_t mdbx_int32_from_key(const MDBX_val);
LIBMDBX_API int64_t mdbx_int64_from_key(const MDBX_val);
/* Retrieve statistics for a database.
*
* [in] txn A transaction handle returned by mdbx_txn_begin().