GOLDEN HOUR

DIR: /usr/include/python3.9

Name	Size	Action
Python-ast.h	25.58 KB
Python.h	3.45 KB
abstract.h	29.76 KB
asdl.h	1.2 KB
ast.h	947 B
bitset.h	468 B
bltinmodule.h	264 B
boolobject.h	885 B
bytearrayobject.h	1.45 KB
bytesobject.h	2.98 KB
cellobject.h	712 B
ceval.h	5.81 KB
classobject.h	1.62 KB
code.h	318 B
codecs.h	6.63 KB
compile.h	3.69 KB
complexobject.h	1.76 KB
context.h	1.92 KB
[ cpython ]	-
datetime.h	9.04 KB
descrobject.h	2.95 KB
dictobject.h	3.63 KB
dynamic_annotations.h	21.94 KB
enumobject.h	253 B
errcode.h	1.59 KB
eval.h	1.18 KB
exports.h	1.07 KB
fileobject.h	1.53 KB
fileutils.h	597 B
floatobject.h	4.26 KB
frameobject.h	337 B
funcobject.h	3.96 KB
genericaliasobject.h	334 B
genobject.h	3.44 KB
graminit.h	2.07 KB
grammar.h	1.78 KB
import.h	2.96 KB
[ internal ]	-
interpreteridobject.h	334 B
intrcheck.h	861 B
iterobject.h	521 B
listobject.h	1.74 KB
longintrepr.h	3.71 KB
longobject.h	9.29 KB
marshal.h	803 B
memoryobject.h	2.7 KB
methodobject.h	3.69 KB
modsupport.h	10.21 KB
moduleobject.h	2.31 KB
namespaceobject.h	349 B
node.h	1.25 KB
object.h	24.05 KB
objimpl.h	8.23 KB
odictobject.h	1.27 KB
opcode.h	4.79 KB
osdefs.h	737 B
osmodule.h	291 B
parsetok.h	2.89 KB
patchlevel.h	1.27 KB
picklebufobject.h	846 B
py_curses.h	2.42 KB
pyarena.h	2.68 KB
pycapsule.h	1.68 KB
pyconfig-64.h	46.85 KB
pyconfig.h	162 B
pyctype.h	1.35 KB
pydebug.h	1.07 KB
pydtrace.h	2.36 KB
pyerrors.h	12.14 KB
pyexpat.h	2.51 KB
pyfpe.h	444 B
pyframe.h	466 B
pyhash.h	4.16 KB
pylifecycle.h	2.09 KB
pymacconfig.h	2.92 KB
pymacro.h	4.8 KB
pymath.h	8.38 KB
pymem.h	4.3 KB
pyport.h	30.54 KB
pystate.h	5.13 KB
pystrcmp.h	436 B
pystrhex.h	849 B
pystrtod.h	1.45 KB
pythonrun.h	7.49 KB
pythread.h	5.8 KB
pytime.h	8.72 KB
rangeobject.h	628 B
setobject.h	3.25 KB
sliceobject.h	2.46 KB
structmember.h	1.98 KB
structseq.h	1.36 KB
symtable.h	5.18 KB
sysmodule.h	1.21 KB
token.h	2.58 KB
traceback.h	584 B
tracemalloc.h	1.09 KB
tupleobject.h	1.58 KB
typeslots.h	2.29 KB
ucnhash.h	1.03 KB
unicodeobject.h	34.6 KB
warnings.h	1.73 KB
weakrefobject.h	2.8 KB

Edit: pyhash.h

#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 */

GOLDEN HOUR

Edit: pyhash.h

TERMINAL