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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// #include <memory>
// void* align(size_t alignment, size_t size, void*& ptr, size_t& space);
#include <memory>
#include <cassert>
int main(int, char**)
{
const unsigned N = 20;
char buf[N];
void* r;
void* p = &buf[0];
std::size_t s = N;
r = std::align(4, 10, p, s);
assert(p == &buf[0]);
assert(r == p);
assert(s == N);
p = &buf[1];
s = N;
r = std::align(4, 10, p, s);
assert(p == &buf[4]);
assert(r == p);
assert(s == N-3);
p = &buf[2];
s = N;
r = std::align(4, 10, p, s);
assert(p == &buf[4]);
assert(r == p);
assert(s == N-2);
p = &buf[3];
s = N;
r = std::align(4, 10, p, s);
assert(p == &buf[4]);
assert(r == p);
assert(s == N-1);
p = &buf[4];
s = N;
r = std::align(4, 10, p, s);
assert(p == &buf[4]);
assert(r == p);
assert(s == N);
p = &buf[0];
s = N;
r = std::align(4, N, p, s);
assert(p == &buf[0]);
assert(r == p);
assert(s == N);
p = &buf[1];
s = N-1;
r = std::align(4, N-4, p, s);
assert(p == &buf[4]);
assert(r == p);
assert(s == N-4);
p = &buf[1];
s = N-1;
r = std::align(4, N-3, p, s);
assert(p == &buf[1]);
assert(r == nullptr);
assert(s == N-1);
p = &buf[0];
s = N;
r = std::align(1, N+1, p, s);
assert(p == &buf[0]);
assert(r == nullptr);
assert(s == N);
return 0;
}
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