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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ#ifndef Py_HASH_H #define Py_HASH_H #ifdef __cplusplus extern "C" { #endif /* Helpers for hash functions */ #ifndef Py_LIMITED_API PyAPI_FUNC(Py_hash_t) _Py_HashDouble(double); PyAPI_FUNC(Py_hash_t) _Py_HashPointer(const void*); // Similar to _Py_HashPointer(), but don't replace -1 with -2 PyAPI_FUNC(Py_hash_t) _Py_HashPointerRaw(const void*); PyAPI_FUNC(Py_hash_t) _Py_HashBytes(const void*, Py_ssize_t); #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_NAN 0 #define _PyHASH_IMAG _PyHASH_MULTIPLIER /* hash secret * * memory layout on 64 bit systems * cccccccc cccccccc cccccccc uc -- unsigned char[24] * pppppppp ssssssss ........ fnv -- two Py_hash_t * k0k0k0k0 k1k1k1k1 ........ siphash -- two uint64_t * ........ ........ ssssssss djbx33a -- 16 bytes padding + one Py_hash_t * ........ ........ eeeeeeee pyexpat XML hash salt * * memory layout on 32 bit systems * cccccccc cccccccc cccccccc uc * ppppssss ........ ........ fnv -- two Py_hash_t * k0k0k0k0 k1k1k1k1 ........ siphash -- two uint64_t (*) * ........ ........ ssss.... djbx33a -- 16 bytes padding + one Py_hash_t * ........ ........ eeee.... pyexpat XML hash salt * * (*) The siphash member may not be available on 32 bit platforms without * an unsigned int64 data type. */ #ifndef Py_LIMITED_API typedef union { /* ensure 24 bytes */ unsigned char uc[24]; /* two Py_hash_t for FNV */ struct { Py_hash_t prefix; Py_hash_t suffix; } fnv; /* two uint64 for SipHash24 */ struct { uint64_t k0; uint64_t k1; } siphash; /* a different (!) Py_hash_t for small string optimization */ struct { unsigned char padding[16]; Py_hash_t suffix; } djbx33a; struct { unsigned char padding[16]; Py_hash_t hashsalt; } expat; } _Py_HashSecret_t; PyAPI_DATA(_Py_HashSecret_t) _Py_HashSecret; #endif #ifdef Py_DEBUG PyAPI_DATA(int) _Py_HashSecret_Initialized; #endif /* hash function definition */ #ifndef Py_LIMITED_API 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); #endif /* cutoff for small string DJBX33A optimization in range [1, cutoff). * * About 50% of the strings in a typical Python application are smaller than * 6 to 7 chars. However DJBX33A is vulnerable to hash collision attacks. * NEVER use DJBX33A for long strings! * * A Py_HASH_CUTOFF of 0 disables small string optimization. 32 bit platforms * should use a smaller cutoff because it is easier to create colliding * strings. A cutoff of 7 on 64bit platforms and 5 on 32bit platforms should * provide a decent safety margin. */ #ifndef Py_HASH_CUTOFF # define Py_HASH_CUTOFF 0 #elif (Py_HASH_CUTOFF > 7 || Py_HASH_CUTOFF < 0) # error Py_HASH_CUTOFF must in range 0...7. #endif /* Py_HASH_CUTOFF */ /* hash algorithm selection * * The values for Py_HASH_SIPHASH24 and Py_HASH_FNV are hard-coded in the * configure script. * * - FNV is available on all platforms and architectures. * - SIPHASH24 only works on platforms that don't require aligned memory for integers. * - With EXTERNAL embedders can provide an alternative implementation with:: * * PyHash_FuncDef PyHash_Func = {...}; * * XXX: Figure out __declspec() for extern PyHash_FuncDef. */ #define Py_HASH_EXTERNAL 0 #define Py_HASH_SIPHASH24 1 #define Py_HASH_FNV 2 #ifndef Py_HASH_ALGORITHM # ifndef HAVE_ALIGNED_REQUIRED # define Py_HASH_ALGORITHM Py_HASH_SIPHASH24 # else # define Py_HASH_ALGORITHM Py_HASH_FNV # endif /* uint64_t && uint32_t && aligned */ #endif /* Py_HASH_ALGORITHM */ #ifdef __cplusplus } #endif #endif /* !Py_HASH_H */