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ðŸ“„ pycore_abstract.h(1.87 KB)
ðŸ“„ pycore_asdl.h(2.96 KB)
ðŸ“„ pycore_ast.h(30.78 KB)
ðŸ“„ pycore_ast_state.h(6.62 KB)
ðŸ“„ pycore_atexit.h(1.4 KB)
ðŸ“„ pycore_backoff.h(3.81 KB)
ðŸ“„ pycore_bitutils.h(5.88 KB)
ðŸ“„ pycore_blocks_output_buffer.h(8.57 KB)
ðŸ“„ pycore_brc.h(2.05 KB)
ðŸ“„ pycore_bytes_methods.h(3.84 KB)
ðŸ“„ pycore_bytesobject.h(4.75 KB)
ðŸ“„ pycore_call.h(5.99 KB)
ðŸ“„ pycore_capsule.h(397 B)
ðŸ“„ pycore_cell.h(1.03 KB)
ðŸ“„ pycore_ceval.h(10.9 KB)
ðŸ“„ pycore_ceval_state.h(3.83 KB)
ðŸ“„ pycore_code.h(19.4 KB)
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ðŸ“„ pycore_compile.h(3.66 KB)
ðŸ“„ pycore_complexobject.h(588 B)
ðŸ“„ pycore_condvar.h(2.64 KB)
ðŸ“„ pycore_context.h(1.15 KB)
ðŸ“„ pycore_critical_section.h(7.78 KB)
ðŸ“„ pycore_crossinterp.h(11.84 KB)
ðŸ“„ pycore_descrobject.h(543 B)
ðŸ“„ pycore_dict.h(11.98 KB)
ðŸ“„ pycore_dict_state.h(732 B)
ðŸ“„ pycore_dtoa.h(1.69 KB)
ðŸ“„ pycore_emscripten_signal.h(685 B)
ðŸ“„ pycore_emscripten_trampoline.h(3.11 KB)
ðŸ“„ pycore_exceptions.h(900 B)
ðŸ“„ pycore_faulthandler.h(2.19 KB)
ðŸ“„ pycore_fileutils.h(9.25 KB)
ðŸ“„ pycore_fileutils_windows.h(2.65 KB)
ðŸ“„ pycore_floatobject.h(1.46 KB)
ðŸ“„ pycore_flowgraph.h(1.45 KB)
ðŸ“„ pycore_format.h(480 B)
ðŸ“„ pycore_frame.h(10.62 KB)
ðŸ“„ pycore_freelist.h(4.7 KB)
ðŸ“„ pycore_function.h(1.5 KB)
ðŸ“„ pycore_gc.h(12.66 KB)
ðŸ“„ pycore_genobject.h(859 B)
ðŸ“„ pycore_getopt.h(490 B)
ðŸ“„ pycore_gil.h(2.14 KB)
ðŸ“„ pycore_global_objects.h(3.02 KB)
ðŸ“„ pycore_global_objects_fini_generated.h(115.04 KB)
ðŸ“„ pycore_global_strings.h(26.08 KB)
ðŸ“„ pycore_hamt.h(3.65 KB)
ðŸ“„ pycore_hashtable.h(4.26 KB)
ðŸ“„ pycore_identifier.h(515 B)
ðŸ“„ pycore_import.h(7.55 KB)
ðŸ“„ pycore_importdl.h(3.96 KB)
ðŸ“„ pycore_initconfig.h(6.23 KB)
ðŸ“„ pycore_instruction_sequence.h(2.11 KB)
ðŸ“„ pycore_instruments.h(2.28 KB)
ðŸ“„ pycore_interp.h(14.71 KB)
ðŸ“„ pycore_intrinsics.h(1.71 KB)
ðŸ“„ pycore_jit.h(527 B)
ðŸ“„ pycore_list.h(1.82 KB)
ðŸ“„ pycore_llist.h(2.36 KB)
ðŸ“„ pycore_lock.h(8.34 KB)
ðŸ“„ pycore_long.h(9.73 KB)
ðŸ“„ pycore_memoryobject.h(427 B)
ðŸ“„ pycore_mimalloc.h(1.6 KB)
ðŸ“„ pycore_modsupport.h(3.27 KB)
ðŸ“„ pycore_moduleobject.h(1.54 KB)
ðŸ“„ pycore_namespace.h(435 B)
ðŸ“„ pycore_object.h(26.64 KB)
ðŸ“„ pycore_object_alloc.h(2.13 KB)
ðŸ“„ pycore_object_stack.h(2.33 KB)
ðŸ“„ pycore_object_state.h(942 B)
ðŸ“„ pycore_obmalloc.h(26.78 KB)
ðŸ“„ pycore_obmalloc_init.h(1.89 KB)
ðŸ“„ pycore_opcode_metadata.h(82.74 KB)
ðŸ“„ pycore_opcode_utils.h(2.07 KB)
ðŸ“„ pycore_optimizer.h(8.11 KB)
ðŸ“„ pycore_parking_lot.h(3.27 KB)
ðŸ“„ pycore_parser.h(2.04 KB)
ðŸ“„ pycore_pathconfig.h(658 B)
ðŸ“„ pycore_pyarena.h(2.79 KB)
ðŸ“„ pycore_pyatomic_ft_wrappers.h(7.87 KB)
ðŸ“„ pycore_pybuffer.h(510 B)
ðŸ“„ pycore_pyerrors.h(4.84 KB)
ðŸ“„ pycore_pyhash.h(2.75 KB)
ðŸ“„ pycore_pylifecycle.h(4.36 KB)
ðŸ“„ pycore_pymath.h(8.4 KB)
ðŸ“„ pycore_pymem.h(4.37 KB)
ðŸ“„ pycore_pymem_init.h(3.44 KB)
ðŸ“„ pycore_pystate.h(9.73 KB)
ðŸ“„ pycore_pystats.h(420 B)
ðŸ“„ pycore_pythonrun.h(758 B)
ðŸ“„ pycore_pythread.h(5.3 KB)
ðŸ“„ pycore_qsbr.h(4.81 KB)
ðŸ“„ pycore_range.h(346 B)
ðŸ“„ pycore_runtime.h(12.84 KB)
ðŸ“„ pycore_runtime_init.h(12.74 KB)
ðŸ“„ pycore_runtime_init_generated.h(45.72 KB)
ðŸ“„ pycore_semaphore.h(1.69 KB)
ðŸ“„ pycore_setobject.h(951 B)
ðŸ“„ pycore_signal.h(2.86 KB)
ðŸ“„ pycore_sliceobject.h(369 B)
ðŸ“„ pycore_stackref.h(5.06 KB)
ðŸ“„ pycore_strhex.h(1013 B)
ðŸ“„ pycore_structseq.h(963 B)
ðŸ“„ pycore_symtable.h(8.47 KB)
ðŸ“„ pycore_sysmodule.h(1.15 KB)
ðŸ“„ pycore_time.h(11.52 KB)
ðŸ“„ pycore_token.h(2.93 KB)
ðŸ“„ pycore_traceback.h(3.54 KB)
ðŸ“„ pycore_tracemalloc.h(4.43 KB)
ðŸ“„ pycore_tstate.h(1.32 KB)
ðŸ“„ pycore_tuple.h(820 B)
ðŸ“„ pycore_typeobject.h(8.67 KB)
ðŸ“„ pycore_typevarobject.h(924 B)
ðŸ“„ pycore_ucnhash.h(958 B)
ðŸ“„ pycore_unicodeobject.h(12.15 KB)
ðŸ“„ pycore_unicodeobject_generated.h(129.04 KB)
ðŸ“„ pycore_unionobject.h(742 B)
ðŸ“„ pycore_uop_ids.h(10.03 KB)
ðŸ“„ pycore_uop_metadata.h(38.54 KB)
ðŸ“„ pycore_warnings.h(840 B)
ðŸ“„ pycore_weakref.h(3.25 KB)

Editing: pycore_bitutils.h

/* Bit and bytes utilities.

Bytes swap functions, reverse order of bytes:

- _Py_bswap16(uint16_t)
   - _Py_bswap32(uint32_t)
   - _Py_bswap64(uint64_t)
*/

#ifndef Py_INTERNAL_BITUTILS_H
#define Py_INTERNAL_BITUTILS_H
#ifdef __cplusplus
extern "C" {
#endif

#ifndef Py_BUILD_CORE
#  error "this header requires Py_BUILD_CORE define"
#endif

#if defined(__GNUC__) \
      && ((__GNUC__ >= 5) || (__GNUC__ == 4) && (__GNUC_MINOR__ >= 8))
   /* __builtin_bswap16() is available since GCC 4.8,
      __builtin_bswap32() is available since GCC 4.3,
      __builtin_bswap64() is available since GCC 4.3. */
#  define _PY_HAVE_BUILTIN_BSWAP
#endif

#ifdef _MSC_VER
#  include <intrin.h>             // _byteswap_uint64()
#endif

static inline uint16_t
_Py_bswap16(uint16_t word)
{
#if defined(_PY_HAVE_BUILTIN_BSWAP) || _Py__has_builtin(__builtin_bswap16)
    return __builtin_bswap16(word);
#elif defined(_MSC_VER)
    Py_BUILD_ASSERT(sizeof(word) == sizeof(unsigned short));
    return _byteswap_ushort(word);
#else
    // Portable implementation which doesn't rely on circular bit shift
    return ( ((word & UINT16_C(0x00FF)) << 8)
           | ((word & UINT16_C(0xFF00)) >> 8));
#endif
}

static inline uint32_t
_Py_bswap32(uint32_t word)
{
#if defined(_PY_HAVE_BUILTIN_BSWAP) || _Py__has_builtin(__builtin_bswap32)
    return __builtin_bswap32(word);
#elif defined(_MSC_VER)
    Py_BUILD_ASSERT(sizeof(word) == sizeof(unsigned long));
    return _byteswap_ulong(word);
#else
    // Portable implementation which doesn't rely on circular bit shift
    return ( ((word & UINT32_C(0x000000FF)) << 24)
           | ((word & UINT32_C(0x0000FF00)) <<  8)
           | ((word & UINT32_C(0x00FF0000)) >>  8)
           | ((word & UINT32_C(0xFF000000)) >> 24));
#endif
}

static inline uint64_t
_Py_bswap64(uint64_t word)
{
#if defined(_PY_HAVE_BUILTIN_BSWAP) || _Py__has_builtin(__builtin_bswap64)
    return __builtin_bswap64(word);
#elif defined(_MSC_VER)
    return _byteswap_uint64(word);
#else
    // Portable implementation which doesn't rely on circular bit shift
    return ( ((word & UINT64_C(0x00000000000000FF)) << 56)
           | ((word & UINT64_C(0x000000000000FF00)) << 40)
           | ((word & UINT64_C(0x0000000000FF0000)) << 24)
           | ((word & UINT64_C(0x00000000FF000000)) <<  8)
           | ((word & UINT64_C(0x000000FF00000000)) >>  8)
           | ((word & UINT64_C(0x0000FF0000000000)) >> 24)
           | ((word & UINT64_C(0x00FF000000000000)) >> 40)
           | ((word & UINT64_C(0xFF00000000000000)) >> 56));
#endif
}

// Population count: count the number of 1's in 'x'
// (number of bits set to 1), also known as the hamming weight.
//
// Implementation note. CPUID is not used, to test if x86 POPCNT instruction
// can be used, to keep the implementation simple. For example, Visual Studio
// __popcnt() is not used this reason. The clang and GCC builtin function can
// use the x86 POPCNT instruction if the target architecture has SSE4a or
// newer.
static inline int
_Py_popcount32(uint32_t x)
{
#if (defined(__clang__) || defined(__GNUC__))

#if SIZEOF_INT >= 4
    Py_BUILD_ASSERT(sizeof(x) <= sizeof(unsigned int));
    return __builtin_popcount(x);
#else
    // The C standard guarantees that unsigned long will always be big enough
    // to hold a uint32_t value without losing information.
    Py_BUILD_ASSERT(sizeof(x) <= sizeof(unsigned long));
    return __builtin_popcountl(x);
#endif

#else
    // 32-bit SWAR (SIMD Within A Register) popcount

// Binary: 0 1 0 1 ...
    const uint32_t M1 = 0x55555555;
    // Binary: 00 11 00 11. ..
    const uint32_t M2 = 0x33333333;
    // Binary: 0000 1111 0000 1111 ...
    const uint32_t M4 = 0x0F0F0F0F;

// Put count of each 2 bits into those 2 bits
    x = x - ((x >> 1) & M1);
    // Put count of each 4 bits into those 4 bits
    x = (x & M2) + ((x >> 2) & M2);
    // Put count of each 8 bits into those 8 bits
    x = (x + (x >> 4)) & M4;
    // Sum of the 4 byte counts.
    // Take care when considering changes to the next line. Portability and
    // correctness are delicate here, thanks to C's "integer promotions" (C99
    // §6.3.1.1p2). On machines where the `int` type has width greater than 32
    // bits, `x` will be promoted to an `int`, and following C's "usual
    // arithmetic conversions" (C99 §6.3.1.8), the multiplication will be
    // performed as a multiplication of two `unsigned int` operands. In this
    // case it's critical that we cast back to `uint32_t` in order to keep only
    // the least significant 32 bits. On machines where the `int` type has
    // width no greater than 32, the multiplication is of two 32-bit unsigned
    // integer types, and the (uint32_t) cast is a no-op. In both cases, we
    // avoid the risk of undefined behaviour due to overflow of a
    // multiplication of signed integer types.
    return (uint32_t)(x * 0x01010101U) >> 24;
#endif
}

// Return the index of the most significant 1 bit in 'x'. This is the smallest
// integer k such that x < 2**k. Equivalent to floor(log2(x)) + 1 for x != 0.
static inline int
_Py_bit_length(unsigned long x)
{
#if (defined(__clang__) || defined(__GNUC__))
    if (x != 0) {
        // __builtin_clzl() is available since GCC 3.4.
        // Undefined behavior for x == 0.
        return (int)sizeof(unsigned long) * 8 - __builtin_clzl(x);
    }
    else {
        return 0;
    }
#elif defined(_MSC_VER)
    // _BitScanReverse() is documented to search 32 bits.
    Py_BUILD_ASSERT(sizeof(unsigned long) <= 4);
    unsigned long msb;
    if (_BitScanReverse(&msb, x)) {
        return (int)msb + 1;
    }
    else {
        return 0;
    }
#else
    const int BIT_LENGTH_TABLE[32] = {
        0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
        5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
    };
    int msb = 0;
    while (x >= 32) {
        msb += 6;
        x >>= 6;
    }
    msb += BIT_LENGTH_TABLE[x];
    return msb;
#endif
}

#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_BITUTILS_H */

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