#include <sys/types.h>
#include <stdint.h>

typedef intptr_t Py_ssize_t;

#if UINTPTR_MAX == 0xffffffff
    typedef short sdigit;
#elif UINTPTR_MAX == 0xffffffffffffffff
    typedef int32_t sdigit;
#endif

typedef struct PyObject {
    Py_ssize_t ob_refcnt;
    void *b;
} PyObject;
typedef struct PyLongObject {
    Py_ssize_t ob_refcnt;
    void *b, *c, *d;
} PyLongObject;

static inline void _Py_INCREF(PyObject *op)
{
    op->ob_refcnt++;
}
#define Py_INCREF(op) _Py_INCREF((PyObject *)(op))

#ifndef NSMALLPOSINTS
#define NSMALLPOSINTS           257
#endif
#ifndef NSMALLNEGINTS
#define NSMALLNEGINTS           5
#endif

PyLongObject small_ints[NSMALLNEGINTS + NSMALLPOSINTS];

#define CHECK_SMALL_INT(ival) \
    do if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) { \
        return get_small_int((sdigit)ival); \
    } while(0)

static inline int
is_small_int(long long ival)
{
    return -NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS;
}

static PyObject *
get_small_int(sdigit ival)
{
    PyObject *v;
    v = (PyObject *)&small_ints[ival + NSMALLNEGINTS];
    Py_INCREF(v);
    return v;
}

PyObject *PyLong_FromSsize_t_rest(Py_ssize_t ival);

// original code: use macro
PyObject *
PyLong_FromSsize_t_withmacro(Py_ssize_t ival)
{
    CHECK_SMALL_INT(ival);
    
    return PyLong_FromSsize_t_rest(ival);
}

// use inlined function
PyObject *
PyLong_FromSsize_t_withfunc(Py_ssize_t ival)
{
    if (is_small_int(ival)) {
        return get_small_int((sdigit)ival);
    }
    
    return PyLong_FromSsize_t_rest(ival);
}