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Group key2value

Modules > key2value

Key-to-Value functions to avoid using custom comparators .More...

Public Functions

Type	Name
LIBMDBX_API double	mdbx_double_from_key (const MDBX_val key) Get a double value from a 8-byte key.
LIBMDBX_API float	mdbx_float_from_key (const MDBX_val key) Get a float value from a 4-byte key.
LIBMDBX_API int32_t	mdbx_int32_from_key (const MDBX_val key) Get a int32_t value from a 4-byte key.
LIBMDBX_API int64_t	mdbx_int64_from_key (const MDBX_val key) Get a int64_t value from a 8-byte key.
LIBMDBX_API int64_t	mdbx_jsonInteger_from_key (const MDBX_val key) Get a int64_t JSON-number value from a 8-byte key.

Detailed Description

See also: Value-to-Key functions

Public Functions Documentation

function mdbx_double_from_key

Get a double value from a 8-byte key.

LIBMDBX_API double mdbx_double_from_key (
    const MDBX_val key
) 

Parameters:

• key The key made by mdbx_key_from_double().

Returns:

The original double value.

---

function mdbx_float_from_key

Get a float value from a 4-byte key.

LIBMDBX_API float mdbx_float_from_key (
    const MDBX_val key
) 

Parameters:

• key The key made by mdbx_key_from_float().

Returns:

The original float value.

---

function mdbx_int32_from_key

Get a int32_t value from a 4-byte key.

LIBMDBX_API int32_t mdbx_int32_from_key (
    const MDBX_val key
) 

Parameters:

• key The key made by mdbx_key_from_int32().

Returns:

The original int32_t value.

---

function mdbx_int64_from_key

Get a int64_t value from a 8-byte key.

LIBMDBX_API int64_t mdbx_int64_from_key (
    const MDBX_val key
) 

Parameters:

• key The key made by mdbx_key_from_int64().

Returns:

The original int64_t value.

---

function mdbx_jsonInteger_from_key

Get a int64_t JSON-number value from a 8-byte key.

LIBMDBX_API int64_t mdbx_jsonInteger_from_key (
    const MDBX_val key
) 

Parameters:

• key The key made by mdbx_key_from_jsonInteger().

Returns:

The original int64_t value.

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