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