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use libc::{c_char, c_double, c_int, c_long, c_longlong, c_ulong, c_ulonglong, c_void, size_t};

use crate::object::*;
use crate::pyport::Py_ssize_t;

ignore! {
    #[repr(C)]
    struct PyLongObject { /* representation hidden */ }
}

#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    pub static mut PyLong_Type: PyTypeObject;
}

#[inline(always)]
pub unsafe fn PyLong_Check(op: *mut PyObject) -> c_int {
    PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_LONG_SUBCLASS)
}

#[inline(always)]
pub unsafe fn PyLong_CheckExact(op: *mut PyObject) -> c_int {
    let u: *mut PyTypeObject = &mut PyLong_Type;
    (Py_TYPE(op) == u) as c_int
}

#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    pub fn PyLong_FromLong(v: c_long) -> *mut PyObject;
    pub fn PyLong_FromUnsignedLong(v: c_ulong) -> *mut PyObject;
    pub fn PyLong_FromSsize_t(v: Py_ssize_t) -> *mut PyObject;
    pub fn PyLong_FromSize_t(v: size_t) -> *mut PyObject;
    pub fn PyLong_FromLongLong(v: c_longlong) -> *mut PyObject;
    pub fn PyLong_FromUnsignedLongLong(v: c_ulonglong) -> *mut PyObject;
    pub fn PyLong_FromDouble(v: c_double) -> *mut PyObject;
    pub fn PyLong_FromString(
        str: *mut c_char,
        pend: *mut *mut c_char,
        base: c_int,
    ) -> *mut PyObject;
    #[cfg(py_sys_config = "Py_USING_UNICODE")]
    pub fn PyLong_FromUnicode(
        u: *mut crate::unicodeobject::Py_UNICODE,
        length: Py_ssize_t,
        base: c_int,
    ) -> *mut PyObject;
    pub fn PyLong_FromVoidPtr(p: *mut c_void) -> *mut PyObject;

    pub fn PyLong_AsLong(pylong: *mut PyObject) -> c_long;
    pub fn PyLong_AsLongAndOverflow(pylong: *mut PyObject, overflow: *mut c_int) -> c_long;
    pub fn PyLong_AsLongLongAndOverflow(pylong: *mut PyObject, overflow: *mut c_int) -> c_longlong;
    pub fn PyLong_AsSsize_t(pylong: *mut PyObject) -> Py_ssize_t;
    pub fn PyLong_AsUnsignedLong(pylong: *mut PyObject) -> c_ulong;
    pub fn PyLong_AsLongLong(pylong: *mut PyObject) -> c_longlong;
    pub fn PyLong_AsUnsignedLongLong(pylong: *mut PyObject) -> c_ulonglong;
    pub fn PyLong_AsUnsignedLongMask(pylong: *mut PyObject) -> c_ulong;
    pub fn PyLong_AsUnsignedLongLongMask(pylong: *mut PyObject) -> c_ulonglong;
    pub fn PyLong_AsDouble(pylong: *mut PyObject) -> c_double;
    pub fn PyLong_AsVoidPtr(pylong: *mut PyObject) -> *mut c_void;

    pub fn PyLong_GetInfo() -> *mut PyObject;

    ignore! {
        pub fn _PyLong_AsInt(arg1: *mut PyObject) -> c_int;
        pub fn _PyLong_Frexp(a: *mut PyLongObject, e: *mut Py_ssize_t) -> c_double;
        pub fn _PyLong_Sign(v: *mut PyObject) -> c_int;
        pub fn _PyLong_NumBits(v: *mut PyObject) -> size_t;
        pub fn _PyLong_FromByteArray(
            bytes: *const c_uchar,
            n: size_t,
            little_endian: c_int,
            is_signed: c_int,
        ) -> *mut PyObject;
        pub fn _PyLong_AsByteArray(
            v: *mut PyLongObject,
            bytes: *mut c_uchar,
            n: size_t,
            little_endian: c_int,
            is_signed: c_int,
        ) -> c_int;
        pub fn _PyLong_Format(
            aa: *mut PyObject,
            base: c_int,
            addL: c_int,
            newstyle: c_int,
        ) -> *mut PyObject;
        pub fn _PyLong_FormatAdvanced(
            obj: *mut PyObject,
            format_spec: *mut c_char,
            format_spec_len: Py_ssize_t,
        ) -> *mut PyObject;
    }
}