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use ffi;
use enums;
use std::io::Result as IoResult;
use c_vec::CSlice;
use std::io::Write;
pub struct MultiSet {
c: *mut ffi::gsl_multiset,
data: CSlice<usize>
}
impl MultiSet {
pub fn new(n: usize, k: usize) -> Option<MultiSet> {
let tmp = unsafe { ffi::gsl_multiset_alloc(n, k) };
if tmp.is_null() {
None
} else {
unsafe {
if (*tmp).data.is_null() {
Some(MultiSet {
c: tmp,
data: CSlice::new(tmp as *mut usize, 0usize)
})
} else {
Some(MultiSet {
c: tmp,
data: CSlice::new((*tmp).data, (*tmp).k as usize)
})
}
}
}
}
pub fn new_init(n: usize, k: usize) -> Option<MultiSet> {
let tmp = unsafe { ffi::gsl_multiset_calloc(n, k) };
if tmp.is_null() {
None
} else {
unsafe {
if (*tmp).data.is_null() {
Some(MultiSet {
c: tmp,
data: CSlice::new(tmp as *mut usize, 0usize)
})
} else {
Some(MultiSet {
c: tmp,
data: CSlice::new((*tmp).data, (*tmp).k as usize)
})
}
}
}
}
pub fn init_first(&self) {
unsafe { ffi::gsl_multiset_init_first(self.c) }
}
pub fn init_last(&self) {
unsafe { ffi::gsl_multiset_init_last(self.c) }
}
pub fn copy(&self, dest: &MultiSet) -> enums::value::Value {
unsafe { ffi::gsl_multiset_memcpy(dest.c, self.c) }
}
pub fn get(&self, i: usize) -> usize {
unsafe { ffi::gsl_multiset_get(self.c, i) }
}
pub fn n(&self) -> usize {
unsafe { ffi::gsl_multiset_n(self.c) }
}
pub fn k(&self) -> usize {
unsafe { ffi::gsl_multiset_k(self.c) }
}
pub fn data<'r>(&'r mut self) -> &'r mut [usize] {
self.data.as_mut()
}
pub fn valid(&self) -> enums::value::Value {
unsafe { ffi::gsl_multiset_valid(self.c) }
}
pub fn next(&self) -> enums::value::Value {
unsafe { ffi::gsl_multiset_next(self.c) }
}
pub fn prev(&self) -> enums::value::Value {
unsafe { ffi::gsl_multiset_prev(self.c) }
}
pub fn print(&self, writer: &mut Write) -> IoResult<()> {
for value in self.data.as_ref().iter() {
match write!(writer, " {}", *value) {
Ok(_) => {},
Err(e) => return Err(e),
}
}
Ok(())
}
}
impl Drop for MultiSet {
fn drop(&mut self) {
unsafe { ffi::gsl_multiset_free(self.c) };
self.c = ::std::ptr::null_mut();
}
}
impl ffi::FFI<ffi::gsl_multiset> for MultiSet {
fn wrap(c: *mut ffi::gsl_multiset) -> MultiSet {
unsafe {
if (*c).data.is_null() {
MultiSet {
c: c,
data: CSlice::new(c as *mut usize, 0usize)
}
} else {
MultiSet {
c: c,
data: CSlice::new((*c).data, (*c).k as usize)
}
}
}
}
fn unwrap(c: &MultiSet) -> *mut ffi::gsl_multiset {
c.c
}
}