mirror of
https://github.com/Atmosphere-NX/Atmosphere
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78 lines
3.2 KiB
C++
78 lines
3.2 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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namespace ams::fssrv {
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Result PathNormalizer::Normalize(const char **out_path, Buffer *out_buf, const char *path, bool preserve_unc, bool preserve_tail_sep, bool has_mount_name) {
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/* Clear output. */
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*out_path = nullptr;
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*out_buf = Buffer();
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/* Find start of path. */
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const char *path_start = path;
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if (has_mount_name) {
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while (path_start < path + fs::MountNameLengthMax + 1) {
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if (fssystem::PathTool::IsNullTerminator(*path_start)) {
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break;
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} else if (fssystem::PathTool::IsDriveSeparator(*(path_start++))) {
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break;
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}
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}
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R_UNLESS(path < path_start - 1, fs::ResultInvalidPath());
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R_UNLESS(fssystem::PathTool::IsDriveSeparator(*(path_start - 1)), fs::ResultInvalidPath());
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}
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/* Check if we're normalized. */
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bool normalized = false;
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R_TRY(fssystem::PathTool::IsNormalized(&normalized, path_start));
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if (normalized) {
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/* If we're already normalized, no allocation is needed. */
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*out_path = path;
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} else {
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/* Allocate a new buffer. */
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auto buffer = std::make_unique<char[]>(fs::EntryNameLengthMax + 1);
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R_UNLESS(buffer != nullptr, fs::ResultAllocationFailureInPathNormalizer());
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/* Copy in mount name. */
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const size_t mount_name_len = path_start - path;
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std::memcpy(buffer.get(), path, mount_name_len);
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/* Generate normalized path. */
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size_t normalized_len = 0;
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R_TRY(fssystem::PathTool::Normalize(buffer.get() + mount_name_len, &normalized_len, path_start, fs::EntryNameLengthMax + 1 - mount_name_len, preserve_unc));
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/* Preserve the tail separator, if we should. */
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if (preserve_tail_sep) {
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if (fssystem::PathTool::IsSeparator(path[strnlen(path, fs::EntryNameLengthMax) - 1])) {
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/* Nintendo doesn't actually validate this. */
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R_UNLESS(mount_name_len + normalized_len < fs::EntryNameLengthMax, fs::ResultTooLongPath());
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buffer[mount_name_len + normalized_len] = fssystem::StringTraits::DirectorySeparator;
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buffer[mount_name_len + normalized_len + 1] = fssystem::StringTraits::NullTerminator;
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}
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}
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/* Save output. */
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*out_path = buffer.get();
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*out_buf = std::move(buffer);
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}
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return ResultSuccess();
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}
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}
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