forked from OSchip/llvm-project
85 lines
1.7 KiB
C++
85 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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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int main()
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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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}
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