Atmosphere/libraries/libstratosphere/source/ncm/ncm_content_management_utils.cpp

209 lines
8.3 KiB
C++

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