mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-18 18:06:40 +00:00
280 lines
8.2 KiB
C++
280 lines
8.2 KiB
C++
/*
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* Copyright (c) 2018 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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#pragma once
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#include <switch.h>
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#include <map>
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#include "fsmitm_romstorage.hpp"
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#include "../debug.hpp"
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#define ROMFS_ENTRY_EMPTY 0xFFFFFFFF
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#define ROMFS_FILEPARTITION_OFS 0x200
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#define ROMFS_METADATA_FILE_PATH "romfs_metadata.bin"
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/* Types for RomFS Meta construction. */
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enum class RomFSDataSource {
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BaseRomFS,
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FileRomFS,
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LooseFile,
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MetaData,
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Memory,
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};
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struct RomFSBaseSourceInfo {
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u64 offset;
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};
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struct RomFSFileSourceInfo {
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u64 offset;
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};
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struct RomFSLooseSourceInfo {
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const char *path;
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};
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struct RomFSMemorySourceInfo {
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const u8 *data;
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};
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struct RomFSMetaDataSourceInfo {
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};
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struct RomFSSourceInfo {
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u64 virtual_offset;
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u64 size;
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union {
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RomFSBaseSourceInfo base_source_info;
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RomFSFileSourceInfo file_source_info;
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RomFSLooseSourceInfo loose_source_info;
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RomFSMemorySourceInfo memory_source_info;
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RomFSMemorySourceInfo metadata_source_info;
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};
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RomFSDataSource type;
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RomFSSourceInfo(u64 v_o, u64 s, u64 offset, RomFSDataSource t) : virtual_offset(v_o), size(s), type(t) {
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switch (this->type) {
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case RomFSDataSource::BaseRomFS:
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this->base_source_info.offset = offset;
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break;
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case RomFSDataSource::FileRomFS:
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this->file_source_info.offset = offset;
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break;
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case RomFSDataSource::LooseFile:
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case RomFSDataSource::MetaData:
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case RomFSDataSource::Memory:
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default:
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fatalSimple(0xF601);
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}
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}
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RomFSSourceInfo(u64 v_o, u64 s, const void *arg, RomFSDataSource t) : virtual_offset(v_o), size(s), type(t) {
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switch (this->type) {
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case RomFSDataSource::LooseFile:
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this->loose_source_info.path = (decltype(this->loose_source_info.path))arg;
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break;
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case RomFSDataSource::Memory:
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this->memory_source_info.data = (decltype(this->memory_source_info.data))arg;
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break;
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case RomFSDataSource::MetaData:
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case RomFSDataSource::BaseRomFS:
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case RomFSDataSource::FileRomFS:
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default:
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fatalSimple(0xF601);
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}
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}
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RomFSSourceInfo(u64 v_o, u64 s, RomFSDataSource t) : virtual_offset(v_o), size(s), type(t) {
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switch (this->type) {
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case RomFSDataSource::MetaData:
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break;
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case RomFSDataSource::LooseFile:
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case RomFSDataSource::Memory:
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case RomFSDataSource::BaseRomFS:
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case RomFSDataSource::FileRomFS:
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default:
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fatalSimple(0xF601);
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}
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}
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void Cleanup() {
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switch (this->type) {
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case RomFSDataSource::BaseRomFS:
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case RomFSDataSource::FileRomFS:
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case RomFSDataSource::MetaData:
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break;
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case RomFSDataSource::LooseFile:
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delete this->loose_source_info.path;
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break;
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case RomFSDataSource::Memory:
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delete this->memory_source_info.data;
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break;
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default:
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fatalSimple(0xF601);
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}
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}
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static bool Compare(RomFSSourceInfo *a, RomFSSourceInfo *b) {
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return (a->virtual_offset < b->virtual_offset);
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}
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};
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/* Types for building a RomFS. */
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struct RomFSHeader {
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u64 header_size;
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u64 dir_hash_table_ofs;
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u64 dir_hash_table_size;
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u64 dir_table_ofs;
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u64 dir_table_size;
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u64 file_hash_table_ofs;
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u64 file_hash_table_size;
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u64 file_table_ofs;
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u64 file_table_size;
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u64 file_partition_ofs;
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};
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static_assert(sizeof(RomFSHeader) == 0x50, "Incorrect RomFS Header definition!");
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struct RomFSDirectoryEntry {
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u32 parent;
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u32 sibling;
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u32 child;
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u32 file;
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u32 hash;
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u32 name_size;
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char name[];
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};
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static_assert(sizeof(RomFSDirectoryEntry) == 0x18, "Incorrect RomFSDirectoryEntry definition!");
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struct RomFSFileEntry {
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u32 parent;
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u32 sibling;
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u64 offset;
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u64 size;
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u32 hash;
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u32 name_size;
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char name[];
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};
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static_assert(sizeof(RomFSFileEntry) == 0x20, "Incorrect RomFSFileEntry definition!");
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struct RomFSBuildFileContext;
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/* Used as comparator for std::map<char *, RomFSBuild*Context> */
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struct build_ctx_cmp {
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bool operator()(const char *a, const char *b) const {
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return strcmp(a, b) < 0;
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}
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};
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struct RomFSBuildDirectoryContext {
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char *path;
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u32 cur_path_ofs;
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u32 path_len;
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u32 entry_offset = 0;
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RomFSBuildDirectoryContext *parent = NULL;
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RomFSBuildDirectoryContext *child = NULL;
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RomFSBuildDirectoryContext *sibling = NULL;
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RomFSBuildFileContext *file = NULL;
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};
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struct RomFSBuildFileContext {
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char *path;
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u32 cur_path_ofs;
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u32 path_len;
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u32 entry_offset = 0;
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u64 offset = 0;
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u64 size = 0;
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RomFSBuildDirectoryContext *parent = NULL;
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RomFSBuildFileContext *sibling = NULL;
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RomFSDataSource source{0};
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u64 orig_offset = 0;
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};
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class RomFSBuildContext {
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private:
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u64 title_id;
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RomFSBuildDirectoryContext *root;
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std::map<char *, RomFSBuildDirectoryContext *, build_ctx_cmp> directories;
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std::map<char *, RomFSBuildFileContext *, build_ctx_cmp> files;
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u64 num_dirs = 0;
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u64 num_files = 0;
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u64 dir_table_size = 0;
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u64 file_table_size = 0;
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u64 dir_hash_table_size = 0;
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u64 file_hash_table_size = 0;
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u64 file_partition_size = 0;
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FsDirectoryEntry dir_entry;
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RomFSDataSource cur_source_type;
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void VisitDirectory(FsFileSystem *filesys, RomFSBuildDirectoryContext *parent);
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void VisitDirectory(RomFSBuildDirectoryContext *parent, u32 parent_offset, void *dir_table, size_t dir_table_size, void *file_table, size_t file_table_size);
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bool AddDirectory(RomFSBuildDirectoryContext *parent_dir_ctx, RomFSBuildDirectoryContext *dir_ctx, RomFSBuildDirectoryContext **out_dir_ctx);
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bool AddFile(RomFSBuildDirectoryContext *parent_dir_ctx, RomFSBuildFileContext *file_ctx);
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public:
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RomFSBuildContext(u64 tid) : title_id(tid) {
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this->root = new RomFSBuildDirectoryContext({0});
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this->root->path = new char[1];
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this->root->path[0] = '\x00';
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this->directories.insert({this->root->path, this->root});
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this->num_dirs = 1;
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this->dir_table_size = 0x18;
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}
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void MergeSdFiles();
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void MergeRomStorage(IROStorage *storage, RomFSDataSource source);
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/* This finalizes the context. */
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void Build(std::vector<RomFSSourceInfo> *out_infos);
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};
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static inline RomFSDirectoryEntry *romfs_get_direntry(void *directories, uint32_t offset) {
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return (RomFSDirectoryEntry *)((uintptr_t)directories + offset);
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}
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static inline RomFSFileEntry *romfs_get_fentry(void *files, uint32_t offset) {
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return (RomFSFileEntry *)((uintptr_t)files + offset);
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}
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static inline uint32_t romfs_calc_path_hash(uint32_t parent, const unsigned char *path, uint32_t start, size_t path_len) {
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uint32_t hash = parent ^ 123456789;
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for (uint32_t i = 0; i < path_len; i++) {
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hash = (hash >> 5) | (hash << 27);
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hash ^= path[start + i];
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}
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return hash;
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}
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static inline uint32_t romfs_get_hash_table_count(uint32_t num_entries) {
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if (num_entries < 3) {
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return 3;
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} else if (num_entries < 19) {
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return num_entries | 1;
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}
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uint32_t count = num_entries;
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while (count % 2 == 0 || count % 3 == 0 || count % 5 == 0 || count % 7 == 0 || count % 11 == 0 || count % 13 == 0 || count % 17 == 0) {
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count++;
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}
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return count;
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}
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