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extern crate libc;
use array::Array;
use dim4::Dim4;
use defines::{AfError, RandomEngineType};
use error::HANDLE_ERROR;
use self::libc::{c_int, c_uint};
use util::{FloatingPoint, HasAfEnum};
use util::{DimT, MutAfArray, MutRandEngine, RandEngine, Uintl};
#[allow(dead_code)]
extern {
fn af_set_seed(seed: Uintl) -> c_int;
fn af_get_seed(seed: *mut Uintl) -> c_int;
fn af_randu(out: MutAfArray, ndims: c_uint, dims: *const DimT, afdtype: c_uint) -> c_int;
fn af_randn(out: MutAfArray, ndims: c_uint, dims: *const DimT, afdtype: c_uint) -> c_int;
fn af_create_random_engine(engine: MutRandEngine, rtype: c_uint, seed: Uintl) -> c_int;
fn af_retain_random_engine(engine: MutRandEngine, inputEngine: RandEngine) -> c_int;
fn af_random_engine_set_type(engine: MutRandEngine, rtpye: c_uint) -> c_int;
fn af_random_engine_get_type(rtype: *mut c_uint, engine: RandEngine) -> c_int;
fn af_random_engine_set_seed(engine: MutRandEngine, seed: Uintl) -> c_int;
fn af_random_engine_get_seed(seed: *mut Uintl, engine: RandEngine) -> c_int;
fn af_release_random_engine(engine: RandEngine) -> c_int;
fn af_get_default_random_engine(engine: MutRandEngine) -> c_int;
fn af_set_default_random_engine_type(rtype: c_uint) -> c_int;
fn af_random_uniform(out: MutAfArray, ndims: c_uint, dims: *const DimT,
aftype: c_uint, engine: RandEngine) -> c_int;
fn af_random_normal(out: MutAfArray, ndims: c_uint, dims: *const DimT,
aftype: c_uint, engine: RandEngine) -> c_int;
}
pub fn set_seed(seed: u64) {
unsafe {
let err_val = af_set_seed(seed as Uintl);
HANDLE_ERROR(AfError::from(err_val));
}
}
#[allow(unused_mut)]
pub fn get_seed() -> u64 {
let mut ret_val: u64 = 0;
unsafe {
let err_val = af_get_seed(&mut ret_val as *mut Uintl);
HANDLE_ERROR(AfError::from(err_val));
}
ret_val
}
macro_rules! data_gen_def {
[$doc_str: expr, $fn_name:ident, $ffi_name: ident, $($type_trait: ident),+] => (
#[doc=$doc_str]
#[allow(unused_mut)]
pub fn $fn_name<T>(dims: Dim4) -> Array<T>
where $( T: $type_trait, )* {
let aftype = T::get_af_dtype();
let mut temp: i64 = 0;
unsafe {
let err_val = $ffi_name(&mut temp as MutAfArray,
dims.ndims() as c_uint, dims.get().as_ptr() as *const DimT,
aftype as c_uint);
HANDLE_ERROR(AfError::from(err_val));
}
temp.into()
}
)
}
data_gen_def!("Create random numbers from uniform distribution",
randu, af_randu, HasAfEnum);
data_gen_def!("Create random numbers from normal distribution",
randn, af_randn, HasAfEnum, FloatingPoint);
pub struct RandomEngine {
handle: i64,
}
impl From<i64> for RandomEngine {
fn from(t: i64) -> RandomEngine {
RandomEngine {handle: t}
}
}
impl RandomEngine {
pub fn new(rengine: RandomEngineType, seed: Option<u64>) -> RandomEngine {
let mut temp: i64 = 0;
unsafe {
let err_val = af_create_random_engine(&mut temp as MutRandEngine, rengine as c_uint,
match seed {Some(s) => s, None => 0} as Uintl);
HANDLE_ERROR(AfError::from(err_val));
}
RandomEngine::from(temp)
}
pub fn get_type(&self) -> RandomEngineType {
let mut temp: u32 = 0;
unsafe {
let err_val = af_random_engine_get_type(&mut temp as *mut c_uint,
self.handle as RandEngine);
HANDLE_ERROR(AfError::from(err_val));
}
RandomEngineType::from(temp)
}
pub fn set_type(&mut self, engine_type: RandomEngineType) {
unsafe {
let err_val = af_random_engine_set_type(&mut self.handle as MutRandEngine,
engine_type as c_uint);
HANDLE_ERROR(AfError::from(err_val));
}
}
pub fn set_seed(&mut self, seed: u64) {
unsafe {
let err_val = af_random_engine_set_seed(&mut self.handle as MutRandEngine,
seed as Uintl);
HANDLE_ERROR(AfError::from(err_val));
}
}
pub fn get_seed(&self) -> u64 {
let mut seed: u64 = 0;
unsafe {
let err_val = af_random_engine_get_seed(&mut seed as *mut Uintl, self.handle as RandEngine);
HANDLE_ERROR(AfError::from(err_val));
}
seed
}
pub fn get(&self) -> i64 {
self.handle
}
}
impl Clone for RandomEngine {
fn clone(&self) -> RandomEngine {
unsafe {
let mut temp: i64 = 0;
let err_val = af_retain_random_engine(&mut temp as MutRandEngine, self.handle as RandEngine);
HANDLE_ERROR(AfError::from(err_val));
RandomEngine::from(temp)
}
}
}
impl Drop for RandomEngine {
fn drop(&mut self) {
unsafe {
let err_val = af_release_random_engine(self.handle as RandEngine);
HANDLE_ERROR(AfError::from(err_val));
}
}
}
pub fn get_default_random_engine() -> RandomEngine {
let mut handle : i64 = 0;
unsafe {
let mut temp : i64 = 0;
let mut err_val = af_get_default_random_engine(&mut temp as MutRandEngine);
HANDLE_ERROR(AfError::from(err_val));
err_val = af_retain_random_engine(&mut handle as MutRandEngine, temp as RandEngine);
HANDLE_ERROR(AfError::from(err_val));
}
RandomEngine::from(handle)
}
pub fn set_default_random_engine_type(rtype: RandomEngineType) {
unsafe {
let err_val = af_set_default_random_engine_type(rtype as c_uint);
HANDLE_ERROR(AfError::from(err_val));
}
}
pub fn random_uniform<T>(dims: Dim4, engine: &RandomEngine) -> Array<T>
where T: HasAfEnum {
let aftype = T::get_af_dtype();
let mut temp : i64 = 0;
unsafe {
let err_val = af_random_uniform(&mut temp as MutAfArray,
dims.ndims() as c_uint, dims.get().as_ptr() as *const DimT,
aftype as c_uint, engine.get() as RandEngine);
HANDLE_ERROR(AfError::from(err_val));
}
temp.into()
}
pub fn random_normal<T>(dims: Dim4, engine: &RandomEngine) -> Array<T>
where T: HasAfEnum + FloatingPoint
{
let aftype = T::get_af_dtype();
let mut temp : i64 = 0;
unsafe {
let err_val = af_random_normal(&mut temp as MutAfArray,
dims.ndims() as c_uint, dims.get().as_ptr() as *const DimT,
aftype as c_uint, engine.get() as RandEngine);
HANDLE_ERROR(AfError::from(err_val));
}
temp.into()
}