FM / internal

/usr/include/python3.9/internal

Name	Size	Mode	Actions
pegen_interface.h	953	0644	edit dl rm
pycore_abstract.h	479	0644	edit dl rm
pycore_accu.h	1126	0644	edit dl rm
pycore_atomic.h	16977	0644	edit dl rm
pycore_byteswap.h	2620	0644	edit dl rm
pycore_bytes_methods.h	3384	0644	edit dl rm
pycore_call.h	870	0644	edit dl rm
pycore_ceval.h	3403	0644	edit dl rm
pycore_code.h	541	0644	edit dl rm
pycore_condvar.h	2809	0644	edit dl rm
pycore_context.h	800	0644	edit dl rm
pycore_dtoa.h	646	0644	edit dl rm
pycore_fileutils.h	1541	0644	edit dl rm
pycore_gc.h	6647	0644	edit dl rm
pycore_getopt.h	490	0644	edit dl rm
pycore_gil.h	1565	0644	edit dl rm
pycore_hamt.h	3697	0644	edit dl rm
pycore_hashtable.h	4197	0644	edit dl rm
pycore_import.h	473	0644	edit dl rm
pycore_initconfig.h	5233	0644	edit dl rm
pycore_interp.h	5299	0644	edit dl rm
pycore_long.h	1548	0644	edit dl rm
pycore_object.h	4157	0644	edit dl rm
pycore_pathconfig.h	1936	0644	edit dl rm
pycore_pyerrors.h	2032	0644	edit dl rm
pycore_pyhash.h	206	0644	edit dl rm
pycore_pylifecycle.h	3741	0644	edit dl rm
pycore_pymem.h	3363	0644	edit dl rm
pycore_pystate.h	3583	0644	edit dl rm
pycore_runtime.h	4452	0644	edit dl rm
pycore_sysmodule.h	548	0644	edit dl rm
pycore_traceback.h	3056	0644	edit dl rm
pycore_tupleobject.h	442	0644	edit dl rm
pycore_warnings.h	633	0644	edit dl rm

Edit: /usr/include/python3.9/internal/pycore_long.h (1548B)

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

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

/*
 * Default int base conversion size limitation: Denial of Service prevention.
 *
 * Chosen such that this isn't wildly slow on modern hardware and so that
 * everyone's existing deployed numpy test suite passes before
 * https://github.com/numpy/numpy/issues/22098 is widely available.
 *
 * $ python -m timeit -s 's = "1"*4300' 'int(s)'
 * 2000 loops, best of 5: 125 usec per loop
 * $ python -m timeit -s 's = "1"*4300; v = int(s)' 'str(v)'
 * 1000 loops, best of 5: 311 usec per loop
 * (zen2 cloud VM)
 *
 * 4300 decimal digits fits a ~14284 bit number.
 */
#define _PY_LONG_DEFAULT_MAX_STR_DIGITS 4300
/*
 * Threshold for max digits check.  For performance reasons int() and
 * int.__str__() don't checks values that are smaller than this
 * threshold.  Acts as a guaranteed minimum size limit for bignums that
 * applications can expect from CPython.
 *
 * % python -m timeit -s 's = "1"*640; v = int(s)' 'str(int(s))'
 * 20000 loops, best of 5: 12 usec per loop
 *
 * "640 digits should be enough for anyone." - gps
 * fits a ~2126 bit decimal number.
 */
#define _PY_LONG_MAX_STR_DIGITS_THRESHOLD 640

#if ((_PY_LONG_DEFAULT_MAX_STR_DIGITS != 0) && \
   (_PY_LONG_DEFAULT_MAX_STR_DIGITS < _PY_LONG_MAX_STR_DIGITS_THRESHOLD))
# error "_PY_LONG_DEFAULT_MAX_STR_DIGITS smaller than threshold."
#endif

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

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