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55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#ifndef Ty_CPYTHON_HASH_H
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# error "this header file must not be included directly"
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#endif
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/* Prime multiplier used in string and various other hashes. */
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#define PyHASH_MULTIPLIER 1000003UL /* 0xf4243 */
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/* Parameters used for the numeric hash implementation. See notes for
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_Ty_HashDouble in Python/pyhash.c. Numeric hashes are based on
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reduction modulo the prime 2**_PyHASH_BITS - 1. */
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#if SIZEOF_VOID_P >= 8
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# define PyHASH_BITS 61
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#else
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# define PyHASH_BITS 31
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#endif
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#define PyHASH_MODULUS (((size_t)1 << _PyHASH_BITS) - 1)
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#define PyHASH_INF 314159
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#define PyHASH_IMAG PyHASH_MULTIPLIER
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/* Aliases kept for backward compatibility with Python 3.12 */
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#define _PyHASH_MULTIPLIER PyHASH_MULTIPLIER
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#define _PyHASH_BITS PyHASH_BITS
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#define _PyHASH_MODULUS PyHASH_MODULUS
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#define _PyHASH_INF PyHASH_INF
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#define _PyHASH_IMAG PyHASH_IMAG
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/* Helpers for hash functions */
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PyAPI_FUNC(Ty_hash_t) _Ty_HashDouble(TyObject *, double);
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/* hash function definition */
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typedef struct {
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Ty_hash_t (*const hash)(const void *, Ty_ssize_t);
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const char *name;
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const int hash_bits;
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const int seed_bits;
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} PyHash_FuncDef;
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PyAPI_FUNC(PyHash_FuncDef*) PyHash_GetFuncDef(void);
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PyAPI_FUNC(Ty_hash_t) Ty_HashPointer(const void *ptr);
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// Deprecated alias kept for backward compatibility
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Ty_DEPRECATED(3.14) static inline Ty_hash_t
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_Ty_HashPointer(const void *ptr)
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{
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return Ty_HashPointer(ptr);
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}
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PyAPI_FUNC(Ty_hash_t) PyObject_GenericHash(TyObject *);
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PyAPI_FUNC(Ty_hash_t) Ty_HashBuffer(const void *ptr, Ty_ssize_t len);
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