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https://github.com/Atmosphere-NX/Atmosphere.git
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90 lines
3 KiB
C++
90 lines
3 KiB
C++
/*
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* Copyright (c) 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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#include "ncm_fs_utils.hpp"
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namespace ams::ncm::impl {
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namespace {
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constinit std::atomic<u32> g_mount_name_count;
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}
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bool PathView::HasPrefix(util::string_view prefix) const {
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return m_path.compare(0, prefix.length(), prefix) == 0;
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}
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bool PathView::HasSuffix(util::string_view suffix) const {
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return m_path.compare(m_path.length() - suffix.length(), suffix.length(), suffix) == 0;
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}
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util::string_view PathView::GetFileName() const {
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auto pos = m_path.find_last_of("/");
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return pos != util::string_view::npos ? m_path.substr(pos + 1) : m_path;
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}
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MountName CreateUniqueMountName() {
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MountName name = {};
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util::SNPrintf(name.str, sizeof(name.str), "@ncm%08x", g_mount_name_count.fetch_add(1));
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return name;
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}
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RootDirectoryPath GetRootDirectoryPath(const MountName &mount_name) {
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RootDirectoryPath path = {};
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util::SNPrintf(path.str, sizeof(path.str), "%s:/", mount_name.str);
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return path;
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}
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Result CopyFile(const char *dst_path, const char *src_path) {
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fs::FileHandle src_file, dst_file;
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/* Open the source file and get its size. */
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R_TRY(fs::OpenFile(std::addressof(src_file), src_path, fs::OpenMode_Read));
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ON_SCOPE_EXIT { fs::CloseFile(src_file); };
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s64 file_size;
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R_TRY(fs::GetFileSize(std::addressof(file_size), src_file));
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/* Create the destination file. */
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R_TRY(fs::CreateFile(dst_path, file_size));
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/* Open the destination file. */
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R_TRY(fs::OpenFile(std::addressof(dst_file), dst_path, fs::OpenMode_Write));
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ON_SCOPE_EXIT { fs::CloseFile(dst_file); };
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/* Allocate a buffer with which to copy. */
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constexpr size_t BufferSize = 4_KB;
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AutoBuffer buffer;
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R_TRY(buffer.Initialize(BufferSize));
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/* Repeatedly read until we've copied all the data. */
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s64 offset = 0;
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while (offset < file_size) {
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const size_t read_size = std::min(static_cast<size_t>(file_size - offset), buffer.GetSize());
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R_TRY(fs::ReadFile(src_file, offset, buffer.Get(), read_size));
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R_TRY(fs::WriteFile(dst_file, offset, buffer.Get(), read_size, fs::WriteOption::None));
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offset += read_size;
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}
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/* Flush the destination file. */
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R_TRY(fs::FlushFile(dst_file));
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return ResultSuccess();
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}
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}
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