#ifndef Py_CPYTHON_HASH_H

#  error "this header file must not be included directly"

#endif

/* Prime multiplier used in string and various other hashes. */

#define PyHASH_MULTIPLIER 1000003UL  /* 0xf4243 */

/* Parameters used for the numeric hash implementation.  See notes for

   _Py_HashDouble in Python/pyhash.c.  Numeric hashes are based on

   reduction modulo the prime 2**_PyHASH_BITS - 1. */

#if SIZEOF_VOID_P >= 8

#  define PyHASH_BITS 61

#else

#  define PyHASH_BITS 31

#endif

#define PyHASH_MODULUS (((size_t)1 << _PyHASH_BITS) - 1)

#define PyHASH_INF 314159

#define PyHASH_IMAG PyHASH_MULTIPLIER

/* Aliases kept for backward compatibility with Python 3.12 */

#define _PyHASH_MULTIPLIER PyHASH_MULTIPLIER

#define _PyHASH_BITS PyHASH_BITS

#define _PyHASH_MODULUS PyHASH_MODULUS

#define _PyHASH_INF PyHASH_INF

#define _PyHASH_IMAG PyHASH_IMAG

/* Helpers for hash functions */

PyAPI_FUNC(Py_hash_t) _Py_HashDouble(PyObject *, double);

/* hash function definition */

typedef struct {

    Py_hash_t (*const hash)(const void *, Py_ssize_t);

    const char *name;

    const int hash_bits;

    const int seed_bits;

} PyHash_FuncDef;

PyAPI_FUNC(PyHash_FuncDef*) PyHash_GetFuncDef(void);

PyAPI_FUNC(Py_hash_t) Py_HashPointer(const void *ptr);

// Deprecated alias kept for backward compatibility

Py_DEPRECATED(3.14) static inline Py_hash_t

_Py_HashPointer(const void *ptr)

{

    return Py_HashPointer(ptr);

}

PyAPI_FUNC(Py_hash_t) PyObject_GenericHash(PyObject *);

PyAPI_FUNC(Py_hash_t) Py_HashBuffer(const void *ptr, Py_ssize_t len);