125 lines
3.6 KiB
C++
125 lines
3.6 KiB
C++
// -*- C++ -*-
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// Filesystem utils for the C++ library testsuite.
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//
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// Copyright (C) 2014-2018 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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//
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#ifndef _TESTSUITE_FS_H
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#define _TESTSUITE_FS_H 1
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// Assume we want std::filesystem in C++17, unless USE_FILESYSTEM_TS defined:
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#if __cplusplus >= 201703L && ! defined USE_FILESYSTEM_TS
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#include <filesystem>
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namespace test_fs = std::filesystem;
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#else
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#include <experimental/filesystem>
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namespace test_fs = std::experimental::filesystem;
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#endif
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#include <fstream>
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#include <string>
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#include <cstdio>
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#include <stdlib.h>
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#include <unistd.h>
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namespace __gnu_test
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{
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#define PATH_CHK(p1, p2, fn) \
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if ( p1.fn() != p2.fn() ) \
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throw test_fs::filesystem_error("comparing '" #fn "' failed", p1, p2, \
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std::make_error_code(std::errc::invalid_argument) )
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void
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compare_paths(const test_fs::path& p1,
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const test_fs::path& p2)
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{
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PATH_CHK( p1, p2, native );
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PATH_CHK( p1, p2, string );
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PATH_CHK( p1, p2, empty );
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PATH_CHK( p1, p2, has_root_path );
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PATH_CHK( p1, p2, has_root_name );
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PATH_CHK( p1, p2, has_root_directory );
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PATH_CHK( p1, p2, has_relative_path );
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PATH_CHK( p1, p2, has_parent_path );
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PATH_CHK( p1, p2, has_filename );
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PATH_CHK( p1, p2, has_stem );
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PATH_CHK( p1, p2, has_extension );
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PATH_CHK( p1, p2, is_absolute );
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PATH_CHK( p1, p2, is_relative );
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auto d1 = std::distance(p1.begin(), p1.end());
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auto d2 = std::distance(p2.begin(), p2.end());
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if( d1 != d2 )
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throw test_fs::filesystem_error(
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"distance(begin, end)", p1, p2,
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std::make_error_code(std::errc::invalid_argument) );
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}
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const std::string test_paths[] = {
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"", "/", "//", "/.", "/./", "/a", "/a/", "/a//", "/a/b/c/d", "/a//b",
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"a", "a/b", "a/b/", "a/b/c", "a/b/c.d", "a/b/..", "a/b/c.", "a/b/.c"
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};
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// This is NOT supposed to be a secure way to get a unique name!
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// We just need a path that doesn't exist for testing purposes.
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test_fs::path
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nonexistent_path()
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{
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test_fs::path p;
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#if defined(_GNU_SOURCE) || _XOPEN_SOURCE >= 500 || _POSIX_C_SOURCE >= 200112L
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char tmp[] = "filesystem-test.XXXXXX";
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int fd = ::mkstemp(tmp);
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if (fd == -1)
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throw test_fs::filesystem_error("mkstemp failed",
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std::error_code(errno, std::generic_category()));
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::unlink(tmp);
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::close(fd);
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p = tmp;
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#else
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char buf[64];
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static int counter;
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#if _GLIBCXX_USE_C99_STDIO
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std::snprintf(buf, 64,
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#else
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std::sprintf(buf,
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#endif
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"filesystem-test.%d.%lu", counter++, (unsigned long) ::getpid());
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p = buf;
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#endif
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return p;
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}
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// RAII helper to remove a file on scope exit.
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struct scoped_file
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{
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using path_type = test_fs::path;
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enum adopt_file_t { adopt_file };
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explicit
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scoped_file(const path_type& p = nonexistent_path()) : path(p)
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{ std::ofstream{p.native()}; }
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scoped_file(path_type p, adopt_file_t) : path(p) { }
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~scoped_file() { if (!path.empty()) remove(path); }
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path_type path;
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};
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} // namespace __gnu_test
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#endif
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