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iterator.cpp
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iterator.cpp
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
#include "seal/ciphertext.h"
#include "seal/memorymanager.h"
#include "seal/util/iterator.h"
#include <algorithm>
#include <array>
#include <cstdint>
#include <type_traits>
#include <vector>
#include "gtest/gtest.h"
using namespace seal;
using namespace seal::util;
using namespace std;
namespace sealtest
{
namespace util
{
TEST(IteratorTest, IterType)
{
ASSERT_TRUE((is_same<decltype(iter(int(0))), SeqIter<int>>::value));
ASSERT_TRUE((is_same<decltype(iter(size_t(0))), SeqIter<size_t>>::value));
ASSERT_TRUE((is_same<decltype(iter(bool(true))), SeqIter<bool>>::value));
ASSERT_TRUE((is_same<decltype(iter(double(0.0))), SeqIter<double>>::value));
ASSERT_TRUE((is_same<decltype(iter(char(0))), SeqIter<char>>::value));
ASSERT_TRUE((is_same<decltype(iter(uint64_t(0))), SeqIter<uint64_t>>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<Ciphertext &>())), PolyIter>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<const Ciphertext &>())), ConstPolyIter>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<int *>())), PtrIter<int *>>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<const int *>())), PtrIter<const int *>>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<void *>())), PtrIter<void *>>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<const void *>())), PtrIter<const void *>>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<vector<Ciphertext> &>())), PtrIter<Ciphertext *>>::value));
ASSERT_TRUE(
(is_same<decltype(iter(declval<const vector<Ciphertext> &>())), PtrIter<const Ciphertext *>>::value));
ASSERT_TRUE((is_same<
decltype(iter(declval<int>(), declval<size_t>(), declval<Ciphertext &>())),
IterTuple<SeqIter<int>, SeqIter<size_t>, PolyIter>>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<PolyIter>())), PolyIter>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<RNSIter>())), RNSIter>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<CoeffIter>())), CoeffIter>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<PtrIter<int *>>())), PtrIter<int *>>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<SeqIter<int>>())), SeqIter<int>>::value));
ASSERT_TRUE((is_same<decltype(iter(declval<ReverseIter<RNSIter>>())), ReverseIter<RNSIter>>::value));
ASSERT_TRUE((is_same<
decltype(iter(declval<ReverseIter<ReverseIter<RNSIter>>>())),
ReverseIter<ReverseIter<RNSIter>>>::value));
ASSERT_TRUE((is_same<
decltype(iter(declval<IterTuple<RNSIter, ReverseIter<RNSIter>>>())),
IterTuple<RNSIter, ReverseIter<RNSIter>>>::value));
}
TEST(IteratorTest, Iterate)
{
int calls, sum;
calls = 0;
sum = 0;
SEAL_ITERATE(iter(0), 0, [&](auto I) {
sum += I;
calls++;
});
ASSERT_EQ(0, calls);
ASSERT_EQ(0, sum);
calls = 0;
sum = 0;
SEAL_ITERATE(iter(0), 1, [&](auto I) {
sum += I;
calls++;
});
ASSERT_EQ(1, calls);
ASSERT_EQ(0, sum);
calls = 0;
sum = 0;
SEAL_ITERATE(iter(0), 10, [&](auto I) {
sum += I;
calls++;
});
ASSERT_EQ(10, calls);
ASSERT_EQ(45, sum);
sum = 0;
SEAL_ITERATE(iter(0, reverse_iter(0)), 10, [&](auto I) { sum += get<0>(I) + get<1>(I); });
}
TEST(IteratorTest, SeqIter)
{
// Construction
SeqIter<int> s{};
ASSERT_EQ(0, *s);
s = 1;
ASSERT_EQ(1, *s);
s = -1;
ASSERT_EQ(-1, *s);
SeqIter<size_t> t(5);
ASSERT_EQ(5, *t);
t = 0;
ASSERT_EQ(0, *t);
SeqIter<bool> b(true);
ASSERT_EQ(true, b);
b = false;
ASSERT_EQ(false, b);
// Dereference
s = 10;
SeqIter<int> u = *s;
ASSERT_EQ(10, *u);
// Array access
ASSERT_EQ(10, s[0]);
ASSERT_EQ(9, s[-1]);
ASSERT_EQ(0, s[-10]);
ASSERT_EQ(20, s[10]);
ASSERT_EQ(true, b[1]);
// Increment/Decrement
u = s--;
ASSERT_EQ(10, u);
ASSERT_EQ(9, s);
u = s++;
ASSERT_EQ(9, u);
ASSERT_EQ(10, s);
u = --s;
ASSERT_EQ(9, u);
ASSERT_EQ(9, s);
u = ++s;
ASSERT_EQ(10, u);
ASSERT_EQ(10, s);
s += 1;
ASSERT_EQ(11, s);
s -= 1;
ASSERT_EQ(10, s);
u = s - 1;
ASSERT_EQ(10, s);
ASSERT_EQ(9, u);
u = u + 1;
ASSERT_EQ(10, u);
s = 1 + u;
ASSERT_EQ(11, s);
s = -1 + s;
ASSERT_EQ(10, s);
// Difference
ASSERT_EQ(0, u - s);
ASSERT_EQ(1, (u + 1) - s);
// Equality
ASSERT_TRUE(u == s);
ASSERT_TRUE(u != s + 1);
ASSERT_FALSE(u == s + 1);
// Comparison
ASSERT_TRUE(u - 1 < s);
ASSERT_FALSE(u < s - 1);
ASSERT_TRUE(u > s - 1);
ASSERT_FALSE(u - 1 > s);
ASSERT_TRUE(u >= s - 1);
ASSERT_TRUE(u >= s);
ASSERT_FALSE(u - 1 >= s);
ASSERT_TRUE(u - 1 <= s);
ASSERT_TRUE(u <= s);
ASSERT_FALSE(u <= s - 1);
// Value
ASSERT_EQ(10, *s);
ASSERT_EQ(11, *(s + 1));
}
TEST(IteratorTest, PtrIter)
{
array<int, 3> arr{ -1, 0, 1 };
auto arr_zero = arr.data() + 1;
// Construction
PtrIter<int *> s(arr_zero);
ASSERT_EQ(arr_zero, s.ptr());
s = arr_zero;
ASSERT_EQ(arr_zero, s.ptr());
// Dereference
s = arr_zero;
PtrIter<int *> u = s;
ASSERT_EQ(arr_zero, u.ptr());
// Array access
ASSERT_EQ(-1, s[-1]);
ASSERT_EQ(0, s[0]);
ASSERT_EQ(1, s[1]);
// Increment/Decrement
u = s--;
ASSERT_EQ(0, *u);
ASSERT_EQ(-1, *s);
u = s++;
ASSERT_EQ(-1, *u);
ASSERT_EQ(0, *s);
u = --s;
ASSERT_EQ(-1, *u);
ASSERT_EQ(-1, *s);
u = ++s;
ASSERT_EQ(0, *u);
ASSERT_EQ(0, *s);
s += 1;
ASSERT_EQ(1, *s);
s -= 1;
ASSERT_EQ(0, *s);
u = s - 1;
ASSERT_EQ(0, *s);
ASSERT_EQ(-1, *u);
u = u + 1;
ASSERT_EQ(0, *u);
s = 1 + u;
ASSERT_EQ(1, *s);
s = -1 + s;
ASSERT_EQ(0, *s);
// Difference
ASSERT_EQ(0, u - s);
ASSERT_EQ(1, (u + 1) - s);
// Equality
ASSERT_TRUE(u == s);
ASSERT_TRUE(u != s + 1);
ASSERT_FALSE(u == s + 1);
// Comparison
ASSERT_TRUE(u - 1 < s);
ASSERT_FALSE(u < s - 1);
ASSERT_TRUE(u > s - 1);
ASSERT_FALSE(u - 1 > s);
ASSERT_TRUE(u >= s - 1);
ASSERT_TRUE(u >= s);
ASSERT_FALSE(u - 1 >= s);
ASSERT_TRUE(u - 1 <= s);
ASSERT_TRUE(u <= s);
ASSERT_FALSE(u <= s - 1);
// Pointer
ASSERT_EQ(arr_zero, s.ptr());
ASSERT_EQ(arr_zero, static_cast<int *>(s));
ASSERT_EQ(arr_zero, static_cast<const int *>(s));
}
TEST(IteratorTest, StrideIter)
{
array<uint64_t, 6> arr{ 0, 1, 2, 3, 4, 5 };
auto arr_zero = arr.data();
// Construction
StrideIter<uint64_t *> s(arr_zero, 3);
ASSERT_EQ(3, s.stride());
s = StrideIter<uint64_t *>(arr_zero, 2);
ASSERT_EQ(2, s.stride());
// Dereference
CoeffIter t = *s;
ASSERT_EQ(arr_zero, t.ptr());
// Array access
ASSERT_EQ(0, *s[0]);
ASSERT_EQ(2, *s[1]);
ASSERT_EQ(4, *s[2]);
// Increment/Decrement
StrideIter<uint64_t *> u = s++;
ASSERT_EQ(0, **u);
ASSERT_EQ(2, **s);
u = s--;
ASSERT_EQ(2, **u);
ASSERT_EQ(0, **s);
u = ++s;
ASSERT_EQ(2, **u);
ASSERT_EQ(2, **s);
u = --s;
ASSERT_EQ(0, **u);
ASSERT_EQ(0, **s);
s += 1;
ASSERT_EQ(2, **s);
s -= 1;
ASSERT_EQ(0, **s);
u = s + 1;
ASSERT_EQ(0, **s);
ASSERT_EQ(2, **u);
u = u - 1;
ASSERT_EQ(0, **u);
s = 2 + u;
ASSERT_EQ(4, **s);
s = -1 + s;
ASSERT_EQ(2, **s);
// Difference
u = s;
ASSERT_EQ(0, u - s);
ASSERT_EQ(1, (u + 1) - s);
// Equality
ASSERT_TRUE(u == s);
ASSERT_TRUE(u != s + 1);
ASSERT_FALSE(u == s + 1);
// Comparison
ASSERT_TRUE(u - 1 < s);
ASSERT_FALSE(u < s - 1);
ASSERT_TRUE(u > s - 1);
ASSERT_FALSE(u - 1 > s);
ASSERT_TRUE(u >= s - 1);
ASSERT_TRUE(u >= s);
ASSERT_FALSE(u - 1 >= s);
ASSERT_TRUE(u - 1 <= s);
ASSERT_TRUE(u <= s);
ASSERT_FALSE(u <= s - 1);
}
TEST(IteratorTest, RNSIter)
{
array<uint64_t, 6> arr{ 0, 1, 2, 3, 4, 5 };
auto arr_zero = arr.data();
// Construction
RNSIter s(arr_zero, 3);
ASSERT_EQ(3, s.poly_modulus_degree());
s = RNSIter(arr_zero, 2);
ASSERT_EQ(2, s.poly_modulus_degree());
// Dereference
CoeffIter t = *s;
ASSERT_EQ(arr_zero, t.ptr());
// Array access
ASSERT_EQ(0, *s[0]);
ASSERT_EQ(2, *s[1]);
ASSERT_EQ(4, *s[2]);
// Increment/Decrement
RNSIter u = s++;
ASSERT_EQ(0, **u);
ASSERT_EQ(2, **s);
u = s--;
ASSERT_EQ(2, **u);
ASSERT_EQ(0, **s);
u = ++s;
ASSERT_EQ(2, **u);
ASSERT_EQ(2, **s);
u = --s;
ASSERT_EQ(0, **u);
ASSERT_EQ(0, **s);
s += 1;
ASSERT_EQ(2, **s);
s -= 1;
ASSERT_EQ(0, **s);
u = s + 1;
ASSERT_EQ(0, **s);
ASSERT_EQ(2, **u);
u = u - 1;
ASSERT_EQ(0, **u);
s = 2 + u;
ASSERT_EQ(4, **s);
s = -1 + s;
ASSERT_EQ(2, **s);
// Difference
u = s;
ASSERT_EQ(0, u - s);
ASSERT_EQ(1, (u + 1) - s);
// Equality
ASSERT_TRUE(u == s);
ASSERT_TRUE(u != s + 1);
ASSERT_FALSE(u == s + 1);
// Comparison
ASSERT_TRUE(u - 1 < s);
ASSERT_FALSE(u < s - 1);
ASSERT_TRUE(u > s - 1);
ASSERT_FALSE(u - 1 > s);
ASSERT_TRUE(u >= s - 1);
ASSERT_TRUE(u >= s);
ASSERT_FALSE(u - 1 >= s);
ASSERT_TRUE(u - 1 <= s);
ASSERT_TRUE(u <= s);
ASSERT_FALSE(u <= s - 1);
}
TEST(IteratorTest, PolyIter)
{
array<uint64_t, 18> arr{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 };
auto arr_zero = arr.data();
// Construction
PolyIter s(arr_zero, 3, 2);
ASSERT_EQ(3, s.poly_modulus_degree());
ASSERT_EQ(2, s.coeff_modulus_size());
s = PolyIter(arr_zero, 2, 3);
ASSERT_EQ(2, s.poly_modulus_degree());
ASSERT_EQ(3, s.coeff_modulus_size());
// Dereference
RNSIter t = *s;
ASSERT_EQ(arr_zero, t);
ASSERT_EQ(2, t.poly_modulus_degree());
// Array access
ASSERT_EQ(0, **s[0]);
ASSERT_EQ(6, **s[1]);
ASSERT_EQ(12, **s[2]);
// Increment/Decrement
PolyIter u = s++;
ASSERT_EQ(0, ***u);
ASSERT_EQ(6, ***s);
u = s--;
ASSERT_EQ(6, ***u);
ASSERT_EQ(0, ***s);
u = ++s;
ASSERT_EQ(6, ***u);
ASSERT_EQ(6, ***s);
u = --s;
ASSERT_EQ(0, ***u);
ASSERT_EQ(0, ***s);
s += 1;
ASSERT_EQ(6, ***s);
s -= 1;
ASSERT_EQ(0, ***s);
u = s + 1;
ASSERT_EQ(0, ***s);
ASSERT_EQ(6, ***u);
u = u - 1;
ASSERT_EQ(0, ***u);
s = 2 + u;
ASSERT_EQ(12, ***s);
s = -1 + s;
ASSERT_EQ(6, ***s);
// Difference
u = s;
ASSERT_EQ(0, u - s);
ASSERT_EQ(1, (u + 1) - s);
// Equality
ASSERT_TRUE(u == s);
ASSERT_TRUE(u != s + 1);
ASSERT_FALSE(u == s + 1);
// Comparison
ASSERT_TRUE(u - 1 < s);
ASSERT_FALSE(u < s - 1);
ASSERT_TRUE(u > s - 1);
ASSERT_FALSE(u - 1 > s);
ASSERT_TRUE(u >= s - 1);
ASSERT_TRUE(u >= s);
ASSERT_FALSE(u - 1 >= s);
ASSERT_TRUE(u - 1 <= s);
ASSERT_TRUE(u <= s);
ASSERT_FALSE(u <= s - 1);
}
TEST(IteratorTest, IterTuple)
{
// Construction/Get
IterTuple<SeqIter<int>, SeqIter<int>> s(0, 1);
ASSERT_EQ(0, get<0>(s));
ASSERT_EQ(1, get<1>(s));
s = IterTuple<SeqIter<int>, SeqIter<int>>(1, 0);
ASSERT_EQ(1, *get<0>(s));
ASSERT_EQ(0, *get<1>(s));
// Get
ASSERT_EQ(0, get<0>(IterTuple<SeqIter<int>, SeqIter<int>>{ 0, 1 }));
ASSERT_EQ(1, get<1>(IterTuple<SeqIter<int>, SeqIter<int>>{ 0, 1 }));
// Dereference
auto t = *s;
ASSERT_EQ(1, get<0>(t));
ASSERT_EQ(0, get<1>(t));
// Array access
ASSERT_EQ(1, get<0>(s[0]));
ASSERT_EQ(0, get<1>(s[0]));
ASSERT_EQ(0, get<0>(s[-1]));
ASSERT_EQ(-1, get<1>(s[-1]));
ASSERT_EQ(2, get<0>(s[1]));
ASSERT_EQ(1, get<1>(s[1]));
// Increment/Decrement
auto u = s++;
ASSERT_EQ(1, *get<0>(u));
ASSERT_EQ(0, *get<1>(u));
ASSERT_EQ(2, *get<0>(s));
ASSERT_EQ(1, *get<1>(s));
u = s--;
ASSERT_EQ(2, *get<0>(u));
ASSERT_EQ(1, *get<1>(u));
ASSERT_EQ(1, *get<0>(s));
ASSERT_EQ(0, *get<1>(s));
u = ++s;
ASSERT_EQ(2, *get<0>(u));
ASSERT_EQ(1, *get<1>(u));
ASSERT_EQ(2, *get<0>(s));
ASSERT_EQ(1, *get<1>(s));
u = --s;
ASSERT_EQ(1, *get<0>(u));
ASSERT_EQ(0, *get<1>(u));
ASSERT_EQ(1, *get<0>(s));
ASSERT_EQ(0, *get<1>(s));
s += 1;
ASSERT_EQ(2, *get<0>(s));
ASSERT_EQ(1, *get<1>(s));
s -= 1;
ASSERT_EQ(1, *get<0>(s));
ASSERT_EQ(0, *get<1>(s));
u = s + 1;
ASSERT_EQ(2, *get<0>(u));
ASSERT_EQ(1, *get<1>(u));
ASSERT_EQ(1, *get<0>(s));
ASSERT_EQ(0, *get<1>(s));
u = u - 1;
ASSERT_EQ(1, *get<0>(u));
ASSERT_EQ(0, *get<1>(u));
s = 2 + u;
ASSERT_EQ(3, *get<0>(s));
ASSERT_EQ(2, *get<1>(s));
s = -1 + s;
ASSERT_EQ(2, *get<0>(s));
ASSERT_EQ(1, *get<1>(s));
// Difference
u = s;
ASSERT_EQ(0, u - s);
ASSERT_EQ(1, (u + 1) - s);
// Equality
ASSERT_TRUE(u == s);
ASSERT_TRUE(u != s + 1);
ASSERT_FALSE(u == s + 1);
// Comparison
ASSERT_TRUE(u - 1 < s);
ASSERT_FALSE(u < s - 1);
ASSERT_TRUE(u > s - 1);
ASSERT_FALSE(u - 1 > s);
ASSERT_TRUE(u >= s - 1);
ASSERT_TRUE(u >= s);
ASSERT_FALSE(u - 1 >= s);
ASSERT_TRUE(u - 1 <= s);
ASSERT_TRUE(u <= s);
ASSERT_FALSE(u <= s - 1);
}
TEST(IteratorTest, ReverseIter)
{
// Construction
ReverseIter<SeqIter<int>> s{};
ASSERT_EQ(0, *s);
s = reverse_iter(-1);
ASSERT_EQ(-1, *s);
s = reverse_iter(1);
ASSERT_EQ(1, *s);
ReverseIter<SeqIter<size_t>> t(5);
ASSERT_EQ(5, *t);
t = reverse_iter(size_t(0));
ASSERT_EQ(0, *t);
// Dereference
s = reverse_iter(10);
SeqIter<int> v = *s;
ASSERT_EQ(10, *v);
// Array access
ASSERT_EQ(10, s[0]);
ASSERT_EQ(11, s[-1]);
ASSERT_EQ(20, s[-10]);
ASSERT_EQ(0, s[10]);
// Increment/Decrement
auto u = s--;
ASSERT_EQ(10, u);
ASSERT_EQ(11, s);
u = s++;
ASSERT_EQ(11, u);
ASSERT_EQ(10, s);
u = --s;
ASSERT_EQ(11, u);
ASSERT_EQ(11, s);
u = ++s;
ASSERT_EQ(10, u);
ASSERT_EQ(10, s);
s += 1;
ASSERT_EQ(9, s);
s -= 1;
ASSERT_EQ(10, s);
u = s - 1;
ASSERT_EQ(10, s);
ASSERT_EQ(11, u);
u = u + 1;
ASSERT_EQ(10, u);
s = 1 + u;
ASSERT_EQ(9, s);
s = -1 + s;
ASSERT_EQ(10, s);
// Difference
ASSERT_EQ(0, u - s);
ASSERT_EQ(1, (u + 1) - s);
ASSERT_EQ(-1, (u - 1) - s);
ASSERT_EQ(1, u - (s - 1));
ASSERT_EQ(-1, u - (s + 1));
// Equality
ASSERT_TRUE(u == s);
ASSERT_TRUE(u != s + 1);
ASSERT_FALSE(u == s + 1);
// Comparison
ASSERT_TRUE(u - 1 < s);
ASSERT_FALSE(u < s - 1);
ASSERT_TRUE(u > s - 1);
ASSERT_FALSE(u - 1 > s);
ASSERT_TRUE(u >= s - 1);
ASSERT_TRUE(u >= s);
ASSERT_FALSE(u - 1 >= s);
ASSERT_TRUE(u - 1 <= s);
ASSERT_TRUE(u <= s);
ASSERT_FALSE(u <= s - 1);
}
} // namespace util
} // namespace sealtest