mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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85 lines
3.3 KiB
C++
85 lines
3.3 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 "ncm_make_path.hpp"
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#include "ncm_path_utils.hpp"
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namespace ams::ncm::path {
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namespace {
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u16 Get16BitSha256HashPrefix(util::Uuid uuid) {
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u8 hash[SHA256_HASH_SIZE];
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sha256CalculateHash(hash, uuid.data, sizeof(util::Uuid));
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return static_cast<u16>(hash[0]) | (static_cast<u16>(hash[1]) << 8);
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}
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u8 Get8BitSha256HashPrefix(util::Uuid uuid) {
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u8 hash[SHA256_HASH_SIZE];
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sha256CalculateHash(hash, uuid.data, sizeof(util::Uuid));
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return hash[0];
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}
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}
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void MakeContentPathFlat(PathString *out, ContentId content_id, const PathString &root) {
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Path content_name;
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GetContentFileName(content_name.str, content_id);
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out->SetFormat("%s/%s", root.Get(), content_name.str);
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}
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void MakeContentPathDualLayered(PathString *out, ContentId content_id, const PathString &root) {
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const u16 hash = Get16BitSha256HashPrefix(content_id.uuid);
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const u32 hash_lower = (hash >> 4) & 0x3f;
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const u32 hash_upper = (hash >> 10) & 0x3f;
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Path content_name;
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GetContentFileName(content_name.str, content_id);
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out->SetFormat("%s/%08X/%08X/%s", root.Get(), hash_upper, hash_lower, content_name.str);
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}
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void MakeContentPath10BitLayered(PathString *out, ContentId content_id, const PathString &root) {
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const u32 hash = (Get16BitSha256HashPrefix(content_id.uuid) >> 6) & 0x3FF;
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Path content_name;
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GetContentFileName(content_name.str, content_id);
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out->SetFormat("%s/%08X/%s", root.Get(), hash, content_name.str);
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}
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void MakeContentPathHashByteLayered(PathString *out, ContentId content_id, const PathString &root) {
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const u32 hash_byte = static_cast<u32>(Get8BitSha256HashPrefix(content_id.uuid));
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Path content_name;
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GetContentFileName(content_name.str, content_id);
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out->SetFormat("%s/%08X/%s", root.Get(), hash_byte, content_name.str);
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}
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void MakePlaceHolderPathFlat(PathString *out, PlaceHolderId placeholder_id, const PathString &root) {
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Path placeholder_name;
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GetPlaceHolderFileName(placeholder_name.str, placeholder_id);
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out->SetFormat("%s/%s", root.Get(), placeholder_name.str);
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}
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void MakePlaceHolderPathHashByteLayered(PathString *out, PlaceHolderId placeholder_id, const PathString &root) {
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const u32 hash_byte = static_cast<u32>(Get8BitSha256HashPrefix(placeholder_id.uuid));
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Path placeholder_name;
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GetPlaceHolderFileName(placeholder_name.str, placeholder_id);
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out->SetFormat("%s/%08X/%s", root.Get(), hash_byte, placeholder_name.str);
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}
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}
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