#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); // Kept for backward compatibility #define _Py_HashPointer Py_HashPointer /* 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); PyAPI_FUNC(Py_hash_t) PyObject_GenericHash(PyObject *);