mirror of
https://github.com/starr-dusT/yuzu-mainline
synced 2024-03-05 21:12:25 -08:00
107 lines
3.3 KiB
C++
107 lines
3.3 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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/*
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* Adapted by DarkLordZach for use/interaction with yuzu
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*
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* Modifications Copyright 2018 yuzu emulator team
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* Licensed under GPLv2 or any later version
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* Refer to the license.txt file included.
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*/
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#pragma once
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#include <map>
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#include <boost/detail/container_fwd.hpp>
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#include "common/common_types.h"
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#include "vfs.h"
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namespace FileSys {
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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 RomFSDirectoryEntry;
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struct RomFSFileEntry;
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struct RomFSBuildDirectoryContext;
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struct RomFSBuildFileContext;
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class RomFSBuildContext {
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private:
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VirtualDir base;
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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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void VisitDirectory(VirtualDir filesys, RomFSBuildDirectoryContext* parent);
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bool AddDirectory(RomFSBuildDirectoryContext* parent_dir_ctx,
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RomFSBuildDirectoryContext* dir_ctx,
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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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explicit RomFSBuildContext(VirtualDir base);
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/* This finalizes the context. */
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std::map<u64, VirtualFile> Build();
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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,
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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 ||
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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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} // namespace FileSys
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