a0866c5fb5
This patch implements the <filesystem> header and uses that to provide <experimental/filesystem>. Unlike other standard headers, the symbols needed for <filesystem> have not yet been placed in libc++.so. Instead they live in the new libc++fs.a library. Users of filesystem are required to link this library. (Also note that libc++experimental no longer contains the definition of <experimental/filesystem>, which now requires linking libc++fs). The reason for keeping <filesystem> out of the dylib for now is that it's still somewhat experimental, and the possibility of requiring an ABI breaking change is very real. In the future the symbols will likely be moved into the dylib, or the dylib will be made to link libc++fs automagically). Note that moving the symbols out of libc++experimental may break user builds until they update to -lc++fs. This should be OK, because the experimental library provides no stability guarantees. However, I plan on looking into ways we can force libc++experimental to automagically link libc++fs. In order to use a single implementation and set of tests for <filesystem>, it has been placed in a special `__fs` namespace. This namespace is inline in C++17 onward, but not before that. As such implementation is available in C++11 onward, but no filesystem namespace is present "directly", and as such name conflicts shouldn't occur in C++11 or C++14. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@338093 91177308-0d34-0410-b5e6-96231b3b80d8
129 lines
3.9 KiB
C++
129 lines
3.9 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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// UNSUPPORTED: c++98, c++03
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// <filesystem>
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// space_info space(const path& p);
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// space_info space(const path& p, error_code& ec) noexcept;
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#include "filesystem_include.hpp"
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#include <sys/statvfs.h>
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#include "test_macros.h"
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#include "rapid-cxx-test.hpp"
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#include "filesystem_test_helper.hpp"
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using namespace fs;
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bool EqualDelta(std::uintmax_t x, std::uintmax_t y, std::uintmax_t delta) {
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if (x >= y) {
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return (x - y) <= delta;
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} else {
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return (y - x) <= delta;
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}
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}
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TEST_SUITE(filesystem_space_test_suite)
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TEST_CASE(signature_test)
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{
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const path p; ((void)p);
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std::error_code ec; ((void)ec);
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ASSERT_SAME_TYPE(decltype(space(p)), space_info);
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ASSERT_SAME_TYPE(decltype(space(p, ec)), space_info);
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ASSERT_NOT_NOEXCEPT(space(p));
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ASSERT_NOEXCEPT(space(p, ec));
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}
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TEST_CASE(test_error_reporting)
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{
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auto checkThrow = [](path const& f, const std::error_code& ec)
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{
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#ifndef TEST_HAS_NO_EXCEPTIONS
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try {
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space(f);
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return false;
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} catch (filesystem_error const& err) {
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return err.path1() == f
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&& err.path2() == ""
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&& err.code() == ec;
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}
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#else
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((void)f); ((void)ec);
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return true;
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#endif
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};
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const path cases[] = {
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"",
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StaticEnv::DNE,
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StaticEnv::BadSymlink
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};
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for (auto& p : cases) {
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const auto expect = static_cast<std::uintmax_t>(-1);
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std::error_code ec;
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space_info info = space(p, ec);
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TEST_CHECK(ec);
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TEST_CHECK(info.capacity == expect);
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TEST_CHECK(info.free == expect);
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TEST_CHECK(info.available == expect);
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TEST_CHECK(checkThrow(p, ec));
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}
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}
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TEST_CASE(basic_space_test)
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{
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// All the test cases should reside on the same filesystem and therefore
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// should have the same expected result. Compute this expected result
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// one and check that it looks semi-sane.
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struct statvfs expect;
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TEST_REQUIRE(::statvfs(StaticEnv::Dir.c_str(), &expect) != -1);
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TEST_CHECK(expect.f_bavail > 0);
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TEST_CHECK(expect.f_bfree > 0);
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TEST_CHECK(expect.f_bsize > 0);
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TEST_CHECK(expect.f_blocks > 0);
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TEST_REQUIRE(expect.f_frsize > 0);
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auto do_mult = [&](std::uintmax_t val) {
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std::uintmax_t fsize = expect.f_frsize;
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std::uintmax_t new_val = val * fsize;
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TEST_CHECK(new_val / fsize == val); // Test for overflow
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return new_val;
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};
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const std::uintmax_t bad_value = static_cast<std::uintmax_t>(-1);
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const std::uintmax_t expect_capacity = do_mult(expect.f_blocks);
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const std::uintmax_t expect_free = do_mult(expect.f_bfree);
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const std::uintmax_t expect_avail = do_mult(expect.f_bavail);
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// Other processes running on the operating system may have changed
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// the amount of space available. Check that these are within tolerances.
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// Currently 5% of capacity
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const std::uintmax_t delta = expect_capacity / 20;
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const path cases[] = {
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StaticEnv::File,
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StaticEnv::Dir,
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StaticEnv::Dir2,
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StaticEnv::SymlinkToFile,
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StaticEnv::SymlinkToDir
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};
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for (auto& p : cases) {
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std::error_code ec = GetTestEC();
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space_info info = space(p, ec);
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TEST_CHECK(!ec);
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TEST_CHECK(info.capacity != bad_value);
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TEST_CHECK(expect_capacity == info.capacity);
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TEST_CHECK(info.free != bad_value);
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TEST_CHECK(EqualDelta(expect_free, info.free, delta));
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TEST_CHECK(info.available != bad_value);
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TEST_CHECK(EqualDelta(expect_avail, info.available, delta));
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}
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}
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TEST_SUITE_END()
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