use libc::{c_double, c_int, c_long, c_ulong, c_void,c_char};
use std::mem::uninitialized;
use std::cmp;
use std::cmp::Ordering::{self, Greater, Less, Equal};
use std::ops::{Div, DivAssign, Mul, MulAssign, Add, AddAssign, Sub, SubAssign, Neg};
use std::ffi::CString;
use std::string::String;
use super::mpz::mp_bitcnt_t;
use super::mpz::{Mpz, mpz_srcptr};
use super::mpq::{Mpq, mpq_srcptr};
use super::sign::Sign;
use num_traits::{Zero, One};
type mp_exp_t = c_long;
#[repr(C)]
pub struct mpf_struct {
_mp_prec: c_int,
_mp_size: c_int,
_mp_exp: mp_exp_t,
_mp_d: *mut c_void
}
pub type mpf_srcptr = *const mpf_struct;
pub type mpf_ptr = *mut mpf_struct;
#[link(name = "gmp")]
extern "C" {
fn __gmpf_init2(x: mpf_ptr, prec: mp_bitcnt_t);
fn __gmpf_init_set(rop: mpf_ptr, op: mpf_srcptr);
fn __gmpf_clear(x: mpf_ptr);
fn __gmpf_get_prec(op: mpf_srcptr) -> mp_bitcnt_t;
fn __gmpf_set_prec(rop: mpf_ptr, prec: mp_bitcnt_t);
fn __gmpf_set(rop: mpf_ptr, op: mpf_srcptr);
fn __gmpf_set_z(rop: mpf_ptr, op: mpz_srcptr);
fn __gmpf_set_q(rop: mpf_ptr, op: mpq_srcptr);
fn __gmpf_set_str(rop: mpf_ptr, str: *const c_char, base: c_int);
fn __gmpf_set_si(rop: mpf_ptr, op: c_long);
fn __gmpf_get_str(str: *const c_char, expptr: *const mp_exp_t, base: i32, n_digits: i32, op: mpf_ptr) -> *mut c_char;
fn __gmpf_cmp(op1: mpf_srcptr, op2: mpf_srcptr) -> c_int;
fn __gmpf_cmp_d(op1: mpf_srcptr, op2: c_double) -> c_int;
fn __gmpf_cmp_ui(op1: mpf_srcptr, op2: c_ulong) -> c_int;
fn __gmpf_cmp_si(op1: mpf_srcptr, op2: c_long) -> c_int;
fn __gmpf_reldiff(rop: mpf_ptr, op1: mpf_srcptr, op2: mpf_srcptr);
fn __gmpf_add(rop: mpf_ptr, op1: mpf_srcptr, op2: mpf_srcptr);
fn __gmpf_sub(rop: mpf_ptr, op1: mpf_srcptr, op2: mpf_srcptr);
fn __gmpf_mul(rop: mpf_ptr, op1: mpf_srcptr, op2: mpf_srcptr);
fn __gmpf_div(rop: mpf_ptr, op1: mpf_srcptr, op2: mpf_srcptr);
fn __gmpf_neg(rop: mpf_ptr, op: mpf_srcptr);
fn __gmpf_abs(rop: mpf_ptr, op: mpf_srcptr);
fn __gmpf_ceil(rop: mpf_ptr, op: mpf_srcptr);
fn __gmpf_floor(rop: mpf_ptr, op: mpf_srcptr);
fn __gmpf_trunc(rop: mpf_ptr, op: mpf_srcptr);
fn __gmpf_sqrt(rop: mpf_ptr, op: mpf_srcptr);
}
pub struct Mpf {
mpf: mpf_struct,
}
unsafe impl Send for Mpf { }
unsafe impl Sync for Mpf { }
impl Drop for Mpf {
fn drop(&mut self) { unsafe { __gmpf_clear(&mut self.mpf) } }
}
impl Mpf {
pub unsafe fn inner(&self) -> mpf_srcptr {
&self.mpf
}
pub unsafe fn inner_mut(&mut self) -> mpf_ptr {
&mut self.mpf
}
pub fn zero() -> Mpf { Mpf::new(32) }
pub fn new(precision: usize) -> Mpf {
unsafe {
let mut mpf = uninitialized();
__gmpf_init2(&mut mpf, precision as c_ulong);
Mpf { mpf: mpf }
}
}
pub fn set(&mut self, other: &Mpf) {
unsafe { __gmpf_set(&mut self.mpf, &other.mpf) }
}
pub fn set_z(&mut self, other: &Mpz) {
unsafe { __gmpf_set_z(&mut self.mpf, other.inner()) }
}
pub fn set_q(&mut self, other: &Mpq) {
unsafe { __gmpf_set_q(&mut self.mpf, other.inner()) }
}
pub fn get_prec(&self) -> usize {
unsafe { __gmpf_get_prec(&self.mpf) as usize }
}
pub fn set_prec(&mut self, precision: usize) {
unsafe { __gmpf_set_prec(&mut self.mpf, precision as c_ulong) }
}
pub fn set_from_str(&mut self, string: &str, base: i32){
let c_str = CString::new(string).unwrap();
unsafe {
__gmpf_set_str(&mut self.mpf, c_str.as_ptr(), base as c_int);
}
}
pub fn set_from_si(&mut self, int: i64){
unsafe{
__gmpf_set_si(&mut self.mpf,int as c_long);
}
}
pub fn get_str(&mut self, n_digits: i32, base: i32, exp: &mut c_long) -> String{
let c_str = CString::new("").unwrap();
let out;
unsafe{
out = CString::from_raw(__gmpf_get_str(c_str.into_raw(), exp, base, n_digits, &mut self.mpf));
}
out.to_str().unwrap().to_string()
}
pub fn abs(&self) -> Mpf {
unsafe {
let mut res = Mpf::new(self.get_prec());
__gmpf_abs(&mut res.mpf, &self.mpf);
res
}
}
pub fn ceil(&self) -> Mpf {
unsafe {
let mut res = Mpf::new(self.get_prec());
__gmpf_ceil(&mut res.mpf, &self.mpf);
res
}
}
pub fn floor(&self) -> Mpf {
unsafe {
let mut res = Mpf::new(self.get_prec());
__gmpf_floor(&mut res.mpf, &self.mpf);
res
}
}
pub fn trunc(&self) -> Mpf {
unsafe {
let mut res = Mpf::new(self.get_prec());
__gmpf_trunc(&mut res.mpf, &self.mpf);
res
}
}
pub fn reldiff(&self, other: &Mpf) -> Mpf {
unsafe {
let mut res = Mpf::new(cmp::max(self.get_prec(), other.get_prec()));
__gmpf_reldiff(&mut res.mpf, &self.mpf, &other.mpf);
res
}
}
pub fn sqrt(self) -> Mpf {
let mut retval:Mpf;
unsafe {
retval = Mpf::new(__gmpf_get_prec(&self.mpf) as usize);
retval.set_from_si(0);
if __gmpf_cmp_si(&self.mpf, 0) > 0 {
__gmpf_sqrt(&mut retval.mpf, &self.mpf);
} else {
panic!("Square root of negative/zero");
}
}
retval
}
pub fn sign(&self) -> Sign {
let size = self.mpf._mp_size;
if size == 0 {
Sign::Zero
} else if size > 0 {
Sign::Positive
} else {
Sign::Negative
}
}
}
impl Clone for Mpf {
fn clone(&self) -> Mpf {
unsafe {
let mut mpf = uninitialized();
__gmpf_init_set(&mut mpf, &self.mpf);
Mpf { mpf: mpf }
}
}
}
impl Eq for Mpf { }
impl PartialEq for Mpf {
fn eq(&self, other: &Mpf) -> bool {
unsafe { __gmpf_cmp(&self.mpf, &other.mpf) == 0 }
}
}
impl Ord for Mpf {
fn cmp(&self, other: &Mpf) -> Ordering {
let cmp = unsafe { __gmpf_cmp(&self.mpf, &other.mpf) };
if cmp == 0 {
Equal
} else if cmp > 0 {
Greater
} else {
Less
}
}
}
impl PartialOrd for Mpf {
fn partial_cmp(&self, other: &Mpf) -> Option<Ordering> {
Some(self.cmp(other))
}
}
macro_rules! div_guard {
(Div, $is_zero: expr) => {
if $is_zero {
panic!("divide by zero")
}
};
($tr: ident, $what: expr) => {}
}
macro_rules! impl_oper {
($tr: ident, $meth: ident, $tr_assign: ident, $meth_assign: ident, $fun: ident) => {
impl<'a> $tr<Mpf> for &'a Mpf {
type Output = Mpf;
#[inline]
fn $meth(self, other: Mpf) -> Mpf {
self.$meth(&other)
}
}
impl<'a> $tr<&'a Mpf> for Mpf {
type Output = Mpf;
#[inline]
fn $meth(mut self, other: &Mpf) -> Mpf {
self.$meth_assign(other);
self
}
}
impl $tr<Mpf> for Mpf {
type Output = Mpf;
#[inline]
fn $meth(self, other: Mpf) -> Mpf {
self.$meth(&other)
}
}
impl<'a, 'b> $tr<&'a Mpf> for &'b Mpf {
type Output = Mpf;
fn $meth(self, other: &Mpf) -> Mpf {
unsafe {
div_guard!($tr, __gmpf_cmp_ui(&other.mpf, 0) == 0);
let mut res = Mpf::new(cmp::max(self.get_prec(), other.get_prec()));
$fun(&mut res.mpf, &self.mpf, &other.mpf);
res
}
}
}
impl<'a> $tr_assign<Mpf> for Mpf {
#[inline]
fn $meth_assign(&mut self, other: Mpf) {
self.$meth_assign(&other)
}
}
impl<'a> $tr_assign<&'a Mpf> for Mpf {
#[inline]
fn $meth_assign(&mut self, other: &Mpf) {
unsafe {
div_guard!($tr, __gmpf_cmp_ui(&other.mpf, 0) == 0);
$fun(&mut self.mpf, &self.mpf, &other.mpf)
}
}
}
}
}
impl_oper!(Add, add, AddAssign, add_assign, __gmpf_add);
impl_oper!(Sub, sub, SubAssign, sub_assign, __gmpf_sub);
impl_oper!(Mul, mul, MulAssign, mul_assign, __gmpf_mul);
impl_oper!(Div, div, DivAssign, div_assign, __gmpf_div);
impl<'b> Neg for &'b Mpf {
type Output = Mpf;
fn neg(self) -> Mpf {
unsafe {
let mut res = Mpf::new(self.get_prec());
__gmpf_neg(&mut res.mpf, &self.mpf);
res
}
}
}
impl Neg for Mpf {
type Output = Mpf;
#[inline]
fn neg(mut self) -> Mpf {
unsafe {
__gmpf_neg(&mut self.mpf, &self.mpf);
self
}
}
}
impl Zero for Mpf {
#[inline]
fn zero() -> Mpf {
Mpf::zero()
}
#[inline]
fn is_zero(&self) -> bool {
unsafe {
__gmpf_cmp_ui(&self.mpf, 0) == 0
}
}
}
impl One for Mpf {
#[inline]
fn one() -> Mpf {
let mut res = Mpf::new(32);
res.set_from_si(1);
res
}
}