use libc::{c_void, c_char, c_int};
use pyport::Py_ssize_t;
use std::ptr;
use object::*;

#[inline]
pub unsafe fn PyObject_DelAttrString(o: *mut PyObject, attr_name: *const c_char) -> c_int {
    PyObject_SetAttrString(o, attr_name, ptr::null_mut())
}

#[inline]
pub unsafe fn PyObject_DelAttr(o: *mut PyObject, attr_name: *mut PyObject) -> c_int {
    PyObject_SetAttr(o, attr_name, ptr::null_mut())
}

extern "C" {
    pub fn PyObject_Call(callable_object: *mut PyObject, args: *mut PyObject,
                         kw: *mut PyObject) -> *mut PyObject;
    pub fn PyObject_CallObject(callable_object: *mut PyObject,
                               args: *mut PyObject) -> *mut PyObject;
    pub fn PyObject_CallFunction(callable_object: *mut PyObject,
                                 format: *const c_char, ...)
     -> *mut PyObject;
    pub fn PyObject_CallMethod(o: *mut PyObject,
                               method: *const c_char,
                               format: *const c_char, ...)
     -> *mut PyObject;
     

    pub fn PyObject_CallFunctionObjArgs(callable: *mut PyObject, ...)
     -> *mut PyObject;
    pub fn PyObject_CallMethodObjArgs(o: *mut PyObject,
                                      method: *mut PyObject, ...)
     -> *mut PyObject;
    pub fn PyObject_Type(o: *mut PyObject) -> *mut PyObject;
    pub fn PyObject_Size(o: *mut PyObject) -> Py_ssize_t;
}

#[inline]
pub unsafe fn PyObject_Length(o: *mut PyObject) -> Py_ssize_t {
    PyObject_Size(o)
}

extern "C" {
    pub fn PyObject_GetItem(o: *mut PyObject, key: *mut PyObject)
     -> *mut PyObject;
    pub fn PyObject_SetItem(o: *mut PyObject, key: *mut PyObject,
                            v: *mut PyObject) -> c_int;
    pub fn PyObject_DelItemString(o: *mut PyObject,
                                  key: *const c_char)
     -> c_int;
    pub fn PyObject_DelItem(o: *mut PyObject, key: *mut PyObject)
     -> c_int;
    pub fn PyObject_AsCharBuffer(obj: *mut PyObject,
                                 buffer: *mut *const c_char,
                                 buffer_len: *mut Py_ssize_t)
     -> c_int;
    pub fn PyObject_CheckReadBuffer(obj: *mut PyObject) -> c_int;
    pub fn PyObject_AsReadBuffer(obj: *mut PyObject,
                                 buffer: *mut *const c_void,
                                 buffer_len: *mut Py_ssize_t)
     -> c_int;
    pub fn PyObject_AsWriteBuffer(obj: *mut PyObject,
                                  buffer: *mut *mut c_void,
                                  buffer_len: *mut Py_ssize_t)
     -> c_int;
    pub fn PyObject_Format(obj: *mut PyObject, format_spec: *mut PyObject)
     -> *mut PyObject;
    pub fn PyObject_GetIter(arg1: *mut PyObject) -> *mut PyObject;
}

/* not available in limited ABI
#define PyIter_Check(obj) \
    ((obj)->ob_type->tp_iternext != NULL && \
     (obj)->ob_type->tp_iternext != &_PyObject_NextNotImplemented)
*/

extern "C" {
    pub fn PyIter_Next(arg1: *mut PyObject) -> *mut PyObject;
    
    pub fn PyNumber_Check(o: *mut PyObject) -> c_int;
    pub fn PyNumber_Add(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_Subtract(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_Multiply(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_FloorDivide(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_TrueDivide(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_Remainder(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_Divmod(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_Power(o1: *mut PyObject, o2: *mut PyObject,
                          o3: *mut PyObject) -> *mut PyObject;
    pub fn PyNumber_Negative(o: *mut PyObject) -> *mut PyObject;
    pub fn PyNumber_Positive(o: *mut PyObject) -> *mut PyObject;
    pub fn PyNumber_Absolute(o: *mut PyObject) -> *mut PyObject;
    pub fn PyNumber_Invert(o: *mut PyObject) -> *mut PyObject;
    pub fn PyNumber_Lshift(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_Rshift(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_And(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_Xor(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_Or(o1: *mut PyObject, o2: *mut PyObject) -> *mut PyObject;
}

/*
#define PyIndex_Check(obj) \
   ((obj)->ob_type->tp_as_number != NULL && \
    (obj)->ob_type->tp_as_number->nb_index != NULL)
*/

extern "C" {
    pub fn PyNumber_Index(o: *mut PyObject) -> *mut PyObject;
    pub fn PyNumber_AsSsize_t(o: *mut PyObject, exc: *mut PyObject)
     -> Py_ssize_t;
    pub fn PyNumber_Long(o: *mut PyObject) -> *mut PyObject;
    pub fn PyNumber_Float(o: *mut PyObject) -> *mut PyObject;
    pub fn PyNumber_InPlaceAdd(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlaceSubtract(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlaceMultiply(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlaceFloorDivide(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlaceTrueDivide(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlaceRemainder(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlacePower(o1: *mut PyObject, o2: *mut PyObject,
                                 o3: *mut PyObject) -> *mut PyObject;
    pub fn PyNumber_InPlaceLshift(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlaceRshift(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlaceAnd(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlaceXor(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_InPlaceOr(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PyNumber_ToBase(n: *mut PyObject, base: c_int)
     -> *mut PyObject;

    pub fn PySequence_Check(o: *mut PyObject) -> c_int;
    pub fn PySequence_Size(o: *mut PyObject) -> Py_ssize_t;
}

#[inline]
pub unsafe fn PySequence_Length(o: *mut PyObject) -> Py_ssize_t {
    PySequence_Size(o)
}

extern "C" {
    pub fn PySequence_Concat(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PySequence_Repeat(o: *mut PyObject, count: Py_ssize_t)
     -> *mut PyObject;
    pub fn PySequence_GetItem(o: *mut PyObject, i: Py_ssize_t)
     -> *mut PyObject;
    pub fn PySequence_GetSlice(o: *mut PyObject, i1: Py_ssize_t,
                               i2: Py_ssize_t) -> *mut PyObject;
    pub fn PySequence_SetItem(o: *mut PyObject, i: Py_ssize_t,
                              v: *mut PyObject) -> c_int;
    pub fn PySequence_DelItem(o: *mut PyObject, i: Py_ssize_t)
     -> c_int;
    pub fn PySequence_SetSlice(o: *mut PyObject, i1: Py_ssize_t,
                               i2: Py_ssize_t, v: *mut PyObject)
     -> c_int;
    pub fn PySequence_DelSlice(o: *mut PyObject, i1: Py_ssize_t,
                               i2: Py_ssize_t) -> c_int;
    pub fn PySequence_Tuple(o: *mut PyObject) -> *mut PyObject;
    pub fn PySequence_List(o: *mut PyObject) -> *mut PyObject;
    pub fn PySequence_Fast(o: *mut PyObject, m: *const c_char)
     -> *mut PyObject;
    pub fn PySequence_Count(o: *mut PyObject, value: *mut PyObject)
     -> Py_ssize_t;
    pub fn PySequence_Contains(seq: *mut PyObject, ob: *mut PyObject)
     -> c_int;
}

#[inline]
pub unsafe fn PySequence_In(o: *mut PyObject, value: *mut PyObject) -> c_int {
    PySequence_Contains(o, value)
}

extern "C" {
    pub fn PySequence_Index(o: *mut PyObject, value: *mut PyObject)
     -> Py_ssize_t;
    pub fn PySequence_InPlaceConcat(o1: *mut PyObject, o2: *mut PyObject)
     -> *mut PyObject;
    pub fn PySequence_InPlaceRepeat(o: *mut PyObject, count: Py_ssize_t)
     -> *mut PyObject;
    pub fn PyMapping_Check(o: *mut PyObject) -> c_int;
    pub fn PyMapping_Size(o: *mut PyObject) -> Py_ssize_t;
}

#[inline]
pub unsafe fn PyMapping_Length(o: *mut PyObject) -> Py_ssize_t {
    PyMapping_Size(o)
}

#[inline]
pub unsafe fn PyMapping_DelItemString(o : *mut PyObject, key : *mut c_char) -> c_int {
    PyObject_DelItemString(o, key)
}

#[inline]
pub unsafe fn PyMapping_DelItem(o : *mut PyObject, key : *mut PyObject) -> c_int {
    PyObject_DelItem(o, key)
}

extern "C" {
    pub fn PyMapping_HasKeyString(o: *mut PyObject,
                                  key: *const c_char)
     -> c_int;
    pub fn PyMapping_HasKey(o: *mut PyObject, key: *mut PyObject)
     -> c_int;
    pub fn PyMapping_Keys(o: *mut PyObject) -> *mut PyObject;
    pub fn PyMapping_Values(o: *mut PyObject) -> *mut PyObject;
    pub fn PyMapping_Items(o: *mut PyObject) -> *mut PyObject;
    pub fn PyMapping_GetItemString(o: *mut PyObject,
                                   key: *const c_char)
     -> *mut PyObject;
    pub fn PyMapping_SetItemString(o: *mut PyObject,
                                   key: *const c_char,
                                   value: *mut PyObject) -> c_int;
    pub fn PyObject_IsInstance(object: *mut PyObject,
                               typeorclass: *mut PyObject) -> c_int;
    pub fn PyObject_IsSubclass(object: *mut PyObject,
                               typeorclass: *mut PyObject) -> c_int;
}