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The C and C++ Include Header Files

cat -n /usr/include/python3.14/cpython/pyhash.h

     1	#ifndef Py_CPYTHON_HASH_H
     2	#  error "this header file must not be included directly"
     3	#endif
     4	
     5	/* Prime multiplier used in string and various other hashes. */
     6	#define PyHASH_MULTIPLIER 1000003UL  /* 0xf4243 */
     7	
     8	/* Parameters used for the numeric hash implementation.  See notes for
     9	   _Py_HashDouble in Python/pyhash.c.  Numeric hashes are based on
    10	   reduction modulo the prime 2**_PyHASH_BITS - 1. */
    11	
    12	#if SIZEOF_VOID_P >= 8
    13	#  define PyHASH_BITS 61
    14	#else
    15	#  define PyHASH_BITS 31
    16	#endif
    17	
    18	#define PyHASH_MODULUS (((size_t)1 << _PyHASH_BITS) - 1)
    19	#define PyHASH_INF 314159
    20	#define PyHASH_IMAG PyHASH_MULTIPLIER
    21	
    22	/* Aliases kept for backward compatibility with Python 3.12 */
    23	#define _PyHASH_MULTIPLIER PyHASH_MULTIPLIER
    24	#define _PyHASH_BITS PyHASH_BITS
    25	#define _PyHASH_MODULUS PyHASH_MODULUS
    26	#define _PyHASH_INF PyHASH_INF
    27	#define _PyHASH_IMAG PyHASH_IMAG
    28	
    29	/* Helpers for hash functions */
    30	PyAPI_FUNC(Py_hash_t) _Py_HashDouble(PyObject *, double);
    31	
    32	
    33	/* hash function definition */
    34	typedef struct {
    35	    Py_hash_t (*const hash)(const void *, Py_ssize_t);
    36	    const char *name;
    37	    const int hash_bits;
    38	    const int seed_bits;
    39	} PyHash_FuncDef;
    40	
    41	PyAPI_FUNC(PyHash_FuncDef*) PyHash_GetFuncDef(void);
    42	
    43	PyAPI_FUNC(Py_hash_t) Py_HashPointer(const void *ptr);
    44	
    45	// Deprecated alias kept for backward compatibility
    46	Py_DEPRECATED(3.14) static inline Py_hash_t
    47	_Py_HashPointer(const void *ptr)
    48	{
    49	    return Py_HashPointer(ptr);
    50	}
    51	
    52	PyAPI_FUNC(Py_hash_t) PyObject_GenericHash(PyObject *);
    53	
    54	PyAPI_FUNC(Py_hash_t) Py_HashBuffer(const void *ptr, Py_ssize_t len);