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

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/*
* Copyright (c) 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::ncm {
namespace {
constexpr inline s64 EncryptionMetadataSize = 16_KB;
constexpr inline s64 ConcatenationFileSizeMax = 4_GB;
constexpr s64 CalculateAdditionalContentSize(s64 file_size, s64 cluster_size) {
/* Account for the encryption header. */
s64 size = EncryptionMetadataSize;
/* Account for the file size splitting costs. */
size += ((file_size / ConcatenationFileSizeMax) + 1) * cluster_size;
/* Account for various overhead costs. */
size += cluster_size * 3;
return size;
}
template<typename Handler>
Result ForEachContentInfo(const ContentMetaKey &key, ncm::ContentMetaDatabase *db, Handler handler) {
constexpr s32 MaxPerIteration = 0x10;
ContentInfo info_list[MaxPerIteration];
s32 offset = 0;
while (true) {
/* List the content infos. */
s32 count;
R_TRY(db->ListContentInfo(std::addressof(count), info_list, MaxPerIteration, key, offset));
/* Handle all that we listed. */
for (s32 i = 0; i < count; i++) {
bool done = false;
R_TRY(handler(std::addressof(done), info_list[i]));
if (done) {
break;
}
}
/* Check if we're done. */
if (count != MaxPerIteration) {
break;
}
offset += count;
}
return ResultSuccess();
}
}
s64 CalculateRequiredSize(s64 file_size, s64 cluster_size) {
return file_size + CalculateAdditionalContentSize(file_size, cluster_size);
}
s64 CalculateRequiredSizeForExtension(s64 file_size, s64 cluster_size) {
return file_size + ((file_size / ConcatenationFileSizeMax) + 1) * cluster_size;
}
Result EstimateRequiredSize(s64 *out_size, const ContentMetaKey &key, ncm::ContentMetaDatabase *db) {
s64 size = 0;
R_TRY(ForEachContentInfo(key, db, [&size](bool *out_done, const ContentInfo &info) -> Result {
size += CalculateRequiredSize(info.GetSize(), MaxClusterSize);
*out_done = false;
return ResultSuccess();
}));
*out_size = size;
return ResultSuccess();
}
}