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use libc::{c_char, c_int, c_long, c_uchar};

use crate::object::*;

#[repr(C)]
#[derive(Copy)]
pub struct PyImport_Struct_inittab {
    pub name: *mut c_char,
    pub initfunc: Option<unsafe extern "C" fn()>,
}

impl Clone for PyImport_Struct_inittab {
    #[inline]
    fn clone(&self) -> PyImport_Struct_inittab {
        *self
    }
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct PyImport_Struct_frozen {
    pub name: *mut c_char,
    pub code: *mut c_uchar,
    pub size: c_int,
}

#[inline]
pub unsafe fn PyImport_ImportModuleEx(
    name: *mut c_char,
    globals: *mut PyObject,
    locals: *mut PyObject,
    fromlist: *mut PyObject,
) -> *mut PyObject {
    PyImport_ImportModuleLevel(name, globals, locals, fromlist, -1)
}

#[cfg_attr(windows, link(name = "pythonXY"))]
extern "C" {
    pub fn PyImport_ImportModule(name: *const c_char) -> *mut PyObject;
    pub fn PyImport_ImportModuleNoBlock(name: *const c_char) -> *mut PyObject;
    pub fn PyImport_ImportModuleLevel(
        name: *mut c_char,
        globals: *mut PyObject,
        locals: *mut PyObject,
        fromlist: *mut PyObject,
        level: c_int,
    ) -> *mut PyObject;

    pub fn PyImport_Import(name: *mut PyObject) -> *mut PyObject;
    pub fn PyImport_ReloadModule(m: *mut PyObject) -> *mut PyObject;
    pub fn PyImport_AddModule(name: *const c_char) -> *mut PyObject;
    pub fn PyImport_ExecCodeModule(name: *mut c_char, co: *mut PyObject) -> *mut PyObject;
    pub fn PyImport_ExecCodeModuleEx(
        name: *mut c_char,
        co: *mut PyObject,
        pathname: *mut c_char,
    ) -> *mut PyObject;
    pub fn PyImport_GetMagicNumber() -> c_long;
    pub fn PyImport_GetImporter(path: *mut PyObject) -> *mut PyObject;
    pub fn PyImport_GetModuleDict() -> *mut PyObject;
    pub fn PyImport_ImportFrozenModule(name: *mut c_char) -> c_int;

    pub fn PyImport_AppendInittab(
        name: *const c_char,
        initfunc: Option<unsafe extern "C" fn()>,
    ) -> c_int;
    pub fn PyImport_ExtendInittab(newtab: *mut PyImport_Struct_inittab) -> c_int;

    pub static mut PyImport_Inittab: *mut PyImport_Struct_inittab;
    pub static mut PyImport_FrozenModules: *mut PyImport_Struct_frozen;

    ignore! {
        // For internal use only
        pub fn PyImport_Cleanup();
        pub fn _PyImport_AcquireLock();
        pub fn _PyImport_ReleaseLock() -> c_int;
        pub fn _PyImport_FindModule(
            arg1: *const c_char,
            arg2: *mut PyObject,
            arg3: *mut c_char,
            arg4: size_t,
            arg5: *mut *mut FILE,
            arg6: *mut *mut PyObject,
        ) -> *mut Struct_filedescr;
        pub fn _PyImport_IsScript(arg1: *mut Struct_filedescr) -> c_int;
        pub fn _PyImport_ReInitLock();
        pub fn _PyImport_FindExtension(arg1: *mut c_char, arg2: *mut c_char) -> *mut PyObject;
        pub fn _PyImport_FixupExtension(arg1: *mut c_char, arg2: *mut c_char) -> *mut PyObject;
    }
}