libstdc++-v3/testsuite/27_io/filesystem/path/generation/relative.cc

   1 // Copyright (C) 2017-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++17 } }
  19
  20 #include <filesystem>
  21 #include <testsuite_hooks.h>
  22 #include <testsuite_fs.h>
  23
  24 using std::filesystem::path;
  25 using __gnu_test::compare_paths;
  26
  27 // Normalize directory-separators
  28 std::string operator""_norm(const char* s, std::size_t n)
  29 {
  30   std::string str(s, n);
  31 #if defined(__MINGW32__) || defined(__MINGW64__)
  32   for (auto& c : str)
  33     if (c == '/')
  34       c = '\\';
  35 #endif
  36   return str;
  37 }
  38
  39 void
  40 test01()
  41 {
  42   // C++17 [fs.path.gen] p5
  43   compare_paths( path("/a/d").lexically_relative("/a/b/c"), "../../d"_norm );
  44   compare_paths( path("/a/b/c").lexically_relative("/a/d"), "../b/c"_norm );
  45   compare_paths( path("a/b/c").lexically_relative("a"), "b/c"_norm );
  46   compare_paths( path("a/b/c").lexically_relative("a/b/c/x/y"), "../.."_norm );
  47   compare_paths( path("a/b/c").lexically_relative("a/b/c"), "." );
  48   compare_paths( path("a/b").lexically_relative("c/d"), "../../a/b"_norm );
  49 }
  50
  51 void
  52 test02()
  53 {
  54   path p = "a/b/c";
  55   compare_paths( p.lexically_relative(p), "." );
  56   compare_paths( p.lexically_relative("a/../a/b/../b/c/../c/."), "../../b/c"_norm );
  57   compare_paths( p.lexically_relative("../../../"), "" );
  58
  59   compare_paths( path("a/./.").lexically_relative("a"), "./."_norm );
  60 }
  61
  62 void
  63 test03()
  64 {
  65   // LWG 3096
  66   compare_paths( path("/dir").lexically_relative("/dir"), "." );
  67   compare_paths( path("/dir").lexically_relative("/dir/"), "." );
  68   compare_paths( path("/dir").lexically_relative("/dir/."), "." );
  69
  70   compare_paths( path("/dir/").lexically_relative("/dir"), "." );
  71   compare_paths( path("/dir/").lexically_relative("/dir/"), "." );
  72   compare_paths( path("/dir/").lexically_relative("/dir/."), "." );
  73
  74   compare_paths( path("/dir/.").lexically_relative("/dir"), "." );
  75   compare_paths( path("/dir/.").lexically_relative("/dir/"), "." );
  76   compare_paths( path("/dir/.").lexically_relative("/dir/."), "." );
  77 }
  78
  79 void
  80 test04()
  81 {
  82 #if defined(__MINGW32__) || defined(__MINGW64__)
  83   // DR 3070
  84   compare_paths(path("c:/f:o/bar").lexically_relative("c:/f:o/bar"), ".");
  85   compare_paths(path("c:/foo/bar").lexically_relative("c:/foo/b:r"), "..\\bar");
  86   compare_paths(path("c:/foo/b:r").lexically_relative("c:/foo/bar"), "..\\b:r");
  87   compare_paths(path("c:/foo/b:").lexically_relative("c:/foo/b:"), "");
  88   compare_paths(path("c:/foo/bar").lexically_relative("c:/foo/b:"), "");
  89   compare_paths(path("c:/f:/bar").lexically_relative("c:/foo/bar"), "");
  90   compare_paths(path("foo/bar").lexically_relative("foo/b:/bar"), "");
  91 #endif
  92 }
  93
  94 int
  95 main()
  96 {
  97   test01();
  98   test02();
  99   test03();
 100   test04();
 101 }