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index.cpp
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127 lines (103 loc) · 2.73 KB
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/*******************************************************
* Copyright (c) 2014, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
********************************************************/
#include <af/index.h>
#include <af/array.h>
#include <af/algorithm.h>
#include "error.hpp"
#include "common.hpp"
namespace af
{
array lookup(const array &in, const array &idx, const int dim)
{
af_array out = 0;
AF_THROW(af_lookup(&out, in.get(), idx.get(), getFNSD(dim, in.dims())));
return array(out);
}
void copy(array &dst, const array &src,
const index &idx0,
const index &idx1,
const index &idx2,
const index &idx3)
{
unsigned nd = dst.numdims();
af_index_t indices[] = {idx0.get(),
idx1.get(),
idx2.get(),
idx3.get()};
af_array lhs = dst.get();
const af_array rhs = src.get();
AF_THROW(af_assign_gen(&lhs, lhs, nd, indices, rhs));
}
index::index() {
impl.idx.seq = af_span;
impl.isSeq = true;
impl.isBatch = false;
}
index::index(const int idx) {
impl.idx.seq = af_make_seq(idx, idx, 1);
impl.isSeq = true;
impl.isBatch = false;
}
index::index(const af::seq& s0) {
impl.idx.seq = s0.s;
impl.isSeq = true;
impl.isBatch = s0.m_gfor;
}
index::index(const af_seq& s0) {
impl.idx.seq = s0;
impl.isSeq = true;
impl.isBatch = false;
}
index::index(const af::array& idx0) {
array idx = idx0.isbool() ? where(idx0) : idx0;
af_array arr = 0;
AF_THROW(af_retain_array(&arr, idx.get()));
impl.idx.arr = arr;
impl.isSeq = false;
impl.isBatch = false;
}
index::index(const af::index& idx0) {
*this = idx0;
}
index::~index() {
if (!impl.isSeq && impl.idx.arr)
af_release_array(impl.idx.arr);
}
index & index::operator=(const index& idx0) {
impl = idx0.get();
if(impl.isSeq == false){
// increment reference count to avoid double free
// when/if idx0 is destroyed
AF_THROW(af_retain_array(&impl.idx.arr, impl.idx.arr));
}
return *this;
}
#if __cplusplus > 199711L
index::index(index &&idx0) {
impl = idx0.impl;
idx0.impl.idx.arr = nullptr;
}
index& index::operator=(index &&idx0) {
impl = idx0.impl;
idx0.impl.idx.arr = nullptr;
return *this;
}
#endif
static bool operator==(const af_seq& lhs, const af_seq& rhs) {
return lhs.begin == rhs.begin && lhs.end == rhs.end && lhs.step == rhs.step;
}
bool index::isspan() const
{
return impl.isSeq == true && impl.idx.seq == af_span;
}
const af_index_t& index::get() const
{
return impl;
}
}