mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-09-20 07:49:26 -04:00
208 lines
8.3 KiB
C++
208 lines
8.3 KiB
C++
/*
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* Copyright (c) 2019-2020 Adubbz, 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 {
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namespace {
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constexpr inline size_t MaxPackagePathLength = 0x100;
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Result ConvertToFsCommonPath(char *dst, size_t dst_size, const char *package_root_path, const char *entry_path) {
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char package_path[MaxPackagePathLength];
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const size_t path_len = std::snprintf(package_path, sizeof(package_path), "%s%s", package_root_path, entry_path);
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AMS_ABORT_UNLESS(path_len < MaxPackagePathLength);
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return fs::ConvertToFsCommonPath(dst, dst_size, package_path);
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}
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Result LoadContentMeta(ncm::AutoBuffer *out, const char *package_root_path, const fs::DirectoryEntry &entry) {
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AMS_ABORT_UNLESS(impl::PathView(entry.name).HasSuffix(".cnmt.nca"));
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char path[MaxPackagePathLength];
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R_TRY(ConvertToFsCommonPath(path, sizeof(path), package_root_path, entry.name));
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return ncm::ReadContentMetaPath(out, path);
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}
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template<typename F>
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Result ForEachFileInDirectory(const char *root_path, F f) {
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/* Open the directory. */
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fs::DirectoryHandle dir;
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R_TRY(fs::OpenDirectory(std::addressof(dir), root_path, fs::OpenDirectoryMode_File));
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ON_SCOPE_EXIT { fs::CloseDirectory(dir); };
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while (true) {
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/* Read the current entry. */
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s64 count;
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fs::DirectoryEntry entry;
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R_TRY(fs::ReadDirectory(std::addressof(count), std::addressof(entry), dir, 1));
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if (count == 0) {
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break;
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}
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/* Invoke our handler on the entry. */
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bool done;
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R_TRY(f(std::addressof(done), entry));
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R_SUCCEED_IF(done);
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}
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return ResultSuccess();
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}
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}
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Result ContentMetaDatabaseBuilder::BuildFromPackageContentMeta(void *buf, size_t size, const ContentInfo &meta_info) {
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/* Create a reader for the content meta. */
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ncm::PackagedContentMetaReader package_meta_reader(buf, size);
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/* Allocate space to hold the converted meta. */
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const size_t meta_size = package_meta_reader.CalculateConvertContentMetaSize();
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std::unique_ptr<char[]> meta(new (std::nothrow) char[meta_size]);
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/* Convert the meta from packaged form to normal form. */
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package_meta_reader.ConvertToContentMeta(meta.get(), meta_size, meta_info);
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ncm::ContentMetaReader meta_reader(meta.get(), meta_size);
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/* Insert the new metas into the database. */
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R_TRY(this->db->Set(package_meta_reader.GetKey(), meta_reader.GetData(), meta_reader.GetSize()));
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/* We're done. */
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return ResultSuccess();
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}
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Result ContentMetaDatabaseBuilder::BuildFromStorage(ContentStorage *storage) {
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/* Get the total count of contents. */
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s32 total_count;
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R_TRY(storage->GetContentCount(std::addressof(total_count)));
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/* Loop over all contents, looking for a package we can build from. */
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const size_t MaxContentIds = 64;
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ContentId content_ids[MaxContentIds];
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for (s32 offset = 0; offset < total_count; /* ... */) {
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/* List contents at the current offset. */
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s32 count;
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R_TRY(storage->ListContentId(std::addressof(count), content_ids, MaxContentIds, offset));
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/* Loop the contents we listed, looking for a correct one. */
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for (s32 i = 0; i < count; i++) {
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/* Get the path for this content id. */
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auto &content_id = content_ids[i];
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ncm::Path path;
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storage->GetPath(std::addressof(path), content_id);
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/* Read the content meta path, and build. */
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ncm::AutoBuffer package_meta;
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if (R_SUCCEEDED(ncm::ReadContentMetaPath(std::addressof(package_meta), path.str))) {
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/* Get the size of the content. */
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s64 size;
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R_TRY(storage->GetSize(std::addressof(size), content_id));
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/* Build. */
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R_TRY(this->BuildFromPackageContentMeta(package_meta.Get(), package_meta.GetSize(), ContentInfo::Make(content_id, size, ContentType::Meta)));
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}
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}
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/* Advance. */
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offset += count;
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}
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/* Commit our changes. */
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return this->db->Commit();
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}
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Result ContentMetaDatabaseBuilder::BuildFromPackage(const char *package_root_path) {
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/* Build the database by writing every entry in the package. */
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R_TRY(ForEachFileInDirectory(package_root_path, [&](bool *done, const fs::DirectoryEntry &entry) -> Result {
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/* Never early terminate. */
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*done = false;
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/* We have nothing to list if we're not looking at a meta. */
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R_SUCCEED_IF(!impl::PathView(entry.name).HasSuffix(".cnmt.nca"));
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/* Read the content meta path, and build. */
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ncm::AutoBuffer package_meta;
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R_TRY(LoadContentMeta(std::addressof(package_meta), package_root_path, entry));
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/* Try to parse a content id from the name. */
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auto content_id = GetContentIdFromString(entry.name, sizeof(entry.name));
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R_UNLESS(content_id, ncm::ResultInvalidPackageFormat());
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/* Build using the meta. */
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return this->BuildFromPackageContentMeta(package_meta.Get(), package_meta.GetSize(), ContentInfo::Make(*content_id, entry.file_size, ContentType::Meta));
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}));
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/* Commit our changes. */
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return this->db->Commit();
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}
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Result ContentMetaDatabaseBuilder::Cleanup() {
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/* This cleans up the content meta by removing all entries. */
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while (true) {
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/* List as many keys as we can. */
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constexpr s32 MaxKeys = 64;
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ContentMetaKey keys[MaxKeys];
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auto list_count = this->db->ListContentMeta(keys, MaxKeys);
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/* Remove the listed keys. */
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for (auto i = 0; i < list_count.written; i++) {
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R_TRY(this->db->Remove(keys[i]));
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}
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/* If there aren't more keys to read, we're done. */
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if (list_count.written < MaxKeys) {
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break;
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}
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}
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/* Commit our deletions. */
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return this->db->Commit();
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}
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Result ListApplicationPackage(s32 *out_count, ApplicationId *out_ids, size_t max_out_ids, const char *package_root_path) {
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size_t count = 0;
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R_TRY(ForEachFileInDirectory(package_root_path, [&](bool *done, const fs::DirectoryEntry &entry) -> Result {
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/* Never early terminate. */
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*done = false;
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/* We have nothing to list if we're not looking at a meta. */
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R_SUCCEED_IF(!impl::PathView(entry.name).HasSuffix(".cnmt.nca"));
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/* Read the content meta path, and build. */
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ncm::AutoBuffer package_meta;
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R_TRY(LoadContentMeta(std::addressof(package_meta), package_root_path, entry));
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/* Create a reader for the meta. */
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ncm::PackagedContentMetaReader package_meta_reader(package_meta.Get(), package_meta.GetSize());
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/* Write the key to output if we're reading an application. */
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const auto &key = package_meta_reader.GetKey();
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if (key.type == ContentMetaType::Application) {
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R_UNLESS(count < max_out_ids, ncm::ResultBufferInsufficient());
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out_ids[count++] = { key.id };
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}
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return ResultSuccess();
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}));
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*out_count = static_cast<s32>(count);
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return ResultSuccess();
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}
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}
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