use libc::{c_char, c_int, c_double};
use object::PyObject;

extern "C" {
    pub fn PyOS_string_to_double(str: *const c_char,
                                 endptr: *mut *mut c_char,
                                 overflow_exception: *mut PyObject)
     -> c_double;
    pub fn PyOS_double_to_string(val: c_double,
                                 format_code: c_char,
                                 precision: c_int,
                                 flags: c_int,
                                 _type: *mut c_int)
     -> *mut c_char;
}

/* PyOS_double_to_string's "flags" parameter can be set to 0 or more of: */
pub const Py_DTSF_SIGN      : c_int = 0x01; /* always add the sign */
pub const Py_DTSF_ADD_DOT_0 : c_int = 0x02; /* if the result is an integer add ".0" */
pub const Py_DTSF_ALT       : c_int = 0x04; /* "alternate" formatting. it's format_code specific */

/* PyOS_double_to_string's "type", if non-NULL, will be set to one of: */
pub const Py_DTST_FINITE: c_int = 0;
pub const Py_DTST_INFINITE: c_int = 1;
pub const Py_DTST_NAN: c_int = 2;