Atmosphere/libraries/libstratosphere/source/fssrv/fssrv_path_normalizer.cpp

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
namespace ams::fssrv {
Result PathNormalizer::Normalize(const char **out_path, Buffer *out_buf, const char *path, bool preserve_unc, bool preserve_tail_sep, bool has_mount_name) {
/* Check pre-conditions. */
AMS_ASSERT(out_path != nullptr);
AMS_ASSERT(out_buf != nullptr);
/* Clear output. */
*out_path = nullptr;
*out_buf = Buffer();
/* Check if we're normalized. */
bool normalized = false;
R_TRY(fs::PathNormalizer::IsNormalized(std::addressof(normalized), path, preserve_unc, has_mount_name));
if (normalized) {
/* If we're already normalized, no allocation is needed. */
*out_path = path;
} else {
/* Allocate a new buffer. */
auto buffer = fs::impl::MakeUnique<char[]>(fs::EntryNameLengthMax + 1);
R_UNLESS(buffer != nullptr, fs::ResultAllocationFailureInPathNormalizer());
/* Generate normalized path. */
size_t normalized_len = 0;
R_TRY(fs::PathNormalizer::Normalize(buffer.get(), std::addressof(normalized_len), path, fs::EntryNameLengthMax + 1, preserve_unc, has_mount_name));
/* Preserve the tail separator, if we should. */
if (preserve_tail_sep) {
if (fs::PathNormalizer::IsSeparator(path[strnlen(path, fs::EntryNameLengthMax) - 1]) && !fs::PathNormalizer::IsSeparator(buffer[normalized_len - 1])) {
AMS_ASSERT(normalized_len < fs::EntryNameLengthMax);
buffer[normalized_len] = fs::StringTraits::DirectorySeparator;
buffer[normalized_len + 1] = fs::StringTraits::NullTerminator;
}
}
/* Save output. */
*out_path = buffer.get();
*out_buf = std::move(buffer);
}
return ResultSuccess();
}
}