* [PATCH] Add recursive_directory_iterator::pop(error_code&)
@ 2016-10-26 15:20 Jonathan Wakely
2016-10-26 15:34 ` Jonathan Wakely
0 siblings, 1 reply; 2+ messages in thread
From: Jonathan Wakely @ 2016-10-26 15:20 UTC (permalink / raw)
To: libstdc++, gcc-patches
[-- Attachment #1: Type: text/plain, Size: 342 bytes --]
Another Filesystem TS change, implementing LWG 2706.
* include/experimental/bits/fs_dir.h (recursive_directory_iterator):
Overload pop (LWG 2706).
* src/filesystem/dir.cc (recursive_directory_iterator::pop): Define
new overload.
* testsuite/experimental/filesystem/iterators/pop.cc: New test.
Tested x86_64-linux, committed to trunk.
[-- Attachment #2: patch.txt --]
[-- Type: text/plain, Size: 5480 bytes --]
commit aee4c6e7734b41b23d199c0c23ffc4e7fb1ccf8f
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Thu Oct 20 19:48:41 2016 +0100
Add recursive_directory_iterator::pop(error_code&)
* include/experimental/bits/fs_dir.h (recursive_directory_iterator):
Overload pop (LWG 2706).
* src/filesystem/dir.cc (recursive_directory_iterator::pop): Define
new overload.
* testsuite/experimental/filesystem/iterators/pop.cc: New test.
diff --git a/libstdc++-v3/include/experimental/bits/fs_dir.h b/libstdc++-v3/include/experimental/bits/fs_dir.h
index 70a95eb..818e7ff 100644
--- a/libstdc++-v3/include/experimental/bits/fs_dir.h
+++ b/libstdc++-v3/include/experimental/bits/fs_dir.h
@@ -312,6 +312,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
}
void pop();
+ void pop(error_code&);
void disable_recursion_pending() { _M_pending = false; }
diff --git a/libstdc++-v3/src/filesystem/dir.cc b/libstdc++-v3/src/filesystem/dir.cc
index bcd7dd0..9a63c4a 100644
--- a/libstdc++-v3/src/filesystem/dir.cc
+++ b/libstdc++-v3/src/filesystem/dir.cc
@@ -364,19 +364,33 @@ fs::recursive_directory_iterator::increment(error_code& ec) noexcept
}
void
-fs::recursive_directory_iterator::pop()
+fs::recursive_directory_iterator::pop(error_code& ec)
{
if (!_M_dirs)
- _GLIBCXX_THROW_OR_ABORT(filesystem_error(
- "cannot pop non-dereferenceable recursive directory iterator",
- std::make_error_code(errc::invalid_argument)));
+ {
+ ec = std::make_error_code(errc::invalid_argument);
+ return;
+ }
do {
_M_dirs->pop();
if (_M_dirs->empty())
{
_M_dirs.reset();
+ ec.clear();
return;
}
- } while (!_M_dirs->top().advance(nullptr, _M_options));
+ } while (!_M_dirs->top().advance(&ec, _M_options));
+}
+
+void
+fs::recursive_directory_iterator::pop()
+{
+ error_code ec;
+ pop(ec);
+ if (ec)
+ _GLIBCXX_THROW_OR_ABORT(filesystem_error(_M_dirs
+ ? "recursive directory iterator cannot pop"
+ : "non-dereferenceable recursive directory iterator cannot pop",
+ ec));
}
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/iterators/pop.cc b/libstdc++-v3/testsuite/experimental/filesystem/iterators/pop.cc
new file mode 100644
index 0000000..fa1ae62
--- /dev/null
+++ b/libstdc++-v3/testsuite/experimental/filesystem/iterators/pop.cc
@@ -0,0 +1,115 @@
+// Copyright (C) 2016 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-lstdc++fs" }
+// { dg-do run { target c++11 } }
+// { dg-require-filesystem-ts "" }
+
+#include <experimental/filesystem>
+#include <testsuite_hooks.h>
+#include <testsuite_fs.h>
+
+namespace fs = std::experimental::filesystem;
+
+void
+test01()
+{
+ std::error_code ec;
+ fs::recursive_directory_iterator dir;
+ dir.pop(ec); // This is undefined, but our implementation
+ VERIFY( ec ); // checks and returns an error.
+ VERIFY( dir == end(dir) );
+
+ std::error_code ec2;
+ try
+ {
+ dir.pop();
+ }
+ catch (const fs::filesystem_error& ex)
+ {
+ ec2 = ex.code();
+ }
+ VERIFY( ec2 == ec );
+}
+
+void
+test02()
+{
+ std::error_code ec = make_error_code(std::errc::interrupted);
+ const auto p = __gnu_test::nonexistent_path();
+ create_directories(p / "d1/d2/d3");
+ for (int i = 0; i < 3; ++i)
+ {
+ fs::recursive_directory_iterator dir(p);
+ std::advance(dir, i);
+ VERIFY( dir.depth() == i );
+ dir.pop(ec);
+ VERIFY( !ec );
+ VERIFY( dir == end(dir) );
+
+ dir = fs::recursive_directory_iterator(p);
+ std::advance(dir, i);
+ VERIFY( dir.depth() == i );
+ dir.pop();
+ VERIFY( dir == end(dir) );
+ }
+ remove_all(p, ec);
+}
+
+void
+test03()
+{
+ std::error_code ec = make_error_code(std::errc::interrupted);
+ const auto p = __gnu_test::nonexistent_path();
+ create_directories(p / "d1/d2/d3");
+ create_directories(p / "d1/d2/e3");
+ create_directories(p / "d1/e2/d3");
+ create_directories(p / "e1");
+ __gnu_test::scoped_file f(p / "d1/d2/d3/f");
+ for (int i = 0; i < 4; ++i)
+ {
+ fs::recursive_directory_iterator dir(p);
+ std::advance(dir, i);
+ int expected_depth = std::min(i, 3); // fourth entry is a file, not dir
+ VERIFY( dir.depth() == expected_depth );
+ __builtin_printf("%d %d %s\n", i, dir.depth(), dir->path().c_str());
+ dir.pop(ec);
+ VERIFY( !ec );
+ if (dir != end(dir))
+ {
+ __builtin_printf("%d %d %s\n", i, dir.depth(), dir->path().c_str());
+ VERIFY( dir.depth() == (expected_depth - 1) );
+ }
+
+ dir = fs::recursive_directory_iterator(p);
+ std::advance(dir, i);
+ VERIFY( dir.depth() == i );
+ dir.pop();
+ if (dir != end(dir))
+ VERIFY( dir.depth() == (i -1) );
+ }
+ f.path.clear();
+ remove_all(p, ec);
+}
+
+int
+main()
+{
+ test01();
+ test02();
+ test03();
+}
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] Add recursive_directory_iterator::pop(error_code&)
2016-10-26 15:20 [PATCH] Add recursive_directory_iterator::pop(error_code&) Jonathan Wakely
@ 2016-10-26 15:34 ` Jonathan Wakely
0 siblings, 0 replies; 2+ messages in thread
From: Jonathan Wakely @ 2016-10-26 15:34 UTC (permalink / raw)
To: libstdc++, gcc-patches
[-- Attachment #1: Type: text/plain, Size: 484 bytes --]
On 26/10/16 16:19 +0100, Jonathan Wakely wrote:
>Another Filesystem TS change, implementing LWG 2706.
>
> * include/experimental/bits/fs_dir.h (recursive_directory_iterator):
> Overload pop (LWG 2706).
> * src/filesystem/dir.cc (recursive_directory_iterator::pop): Define
> new overload.
> * testsuite/experimental/filesystem/iterators/pop.cc: New test.
>
This new test isn't reliable, it depends on directory order. This
simplifies it so it behaves reliably.
Committed to trunk.
[-- Attachment #2: patch.txt --]
[-- Type: text/x-patch, Size: 1373 bytes --]
commit a16b18039731f450dfb4a8c4fff8db8b8da41817
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Wed Oct 26 16:31:19 2016 +0100
Fix test for recursive_directory_iterator::pop
* testsuite/experimental/filesystem/iterators/pop.cc: Remove
unreliable dependency on directory order.
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/iterators/pop.cc b/libstdc++-v3/testsuite/experimental/filesystem/iterators/pop.cc
index fa1ae62..d247ab4 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/iterators/pop.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/iterators/pop.cc
@@ -78,13 +78,11 @@ test03()
create_directories(p / "d1/d2/d3");
create_directories(p / "d1/d2/e3");
create_directories(p / "d1/e2/d3");
- create_directories(p / "e1");
- __gnu_test::scoped_file f(p / "d1/d2/d3/f");
- for (int i = 0; i < 4; ++i)
+ for (int i = 0; i < 3; ++i)
{
fs::recursive_directory_iterator dir(p);
std::advance(dir, i);
- int expected_depth = std::min(i, 3); // fourth entry is a file, not dir
+ int expected_depth = i;
VERIFY( dir.depth() == expected_depth );
__builtin_printf("%d %d %s\n", i, dir.depth(), dir->path().c_str());
dir.pop(ec);
@@ -102,7 +100,6 @@ test03()
if (dir != end(dir))
VERIFY( dir.depth() == (i -1) );
}
- f.path.clear();
remove_all(p, ec);
}
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