/*
* Copyright (c) 2018 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/>.
*/
/*
* Adapted by DarkLordZach for use/interaction with yuzu
*
* Modifications Copyright 2018 yuzu emulator team
* Licensed under GPLv2 or any later version
* Refer to the license.txt file included.
*/
#pragma once
#include <map>
#include <boost/detail/container_fwd.hpp>
#include "common/common_types.h"
#include "vfs.h"
namespace FileSys {
/* Used as comparator for std::map<char *, RomFSBuild*Context> */
struct build_ctx_cmp {
bool operator()(const char* a, const char* b) const {
return strcmp(a, b) < 0;
}
};
struct RomFSDirectoryEntry;
struct RomFSFileEntry;
struct RomFSBuildDirectoryContext;
struct RomFSBuildFileContext;
class RomFSBuildContext {
private:
VirtualDir base;
RomFSBuildDirectoryContext* root;
std::map<char*, RomFSBuildDirectoryContext*, build_ctx_cmp> directories;
std::map<char*, RomFSBuildFileContext*, build_ctx_cmp> files;
u64 num_dirs = 0;
u64 num_files = 0;
u64 dir_table_size = 0;
u64 file_table_size = 0;
u64 dir_hash_table_size = 0;
u64 file_hash_table_size = 0;
u64 file_partition_size = 0;
void VisitDirectory(VirtualDir filesys, RomFSBuildDirectoryContext* parent);
bool AddDirectory(RomFSBuildDirectoryContext* parent_dir_ctx,
RomFSBuildDirectoryContext* dir_ctx,
RomFSBuildDirectoryContext** out_dir_ctx);
bool AddFile(RomFSBuildDirectoryContext* parent_dir_ctx, RomFSBuildFileContext* file_ctx);
public:
explicit RomFSBuildContext(VirtualDir base);
/* This finalizes the context. */
std::map<u64, VirtualFile> Build();
};
static inline RomFSDirectoryEntry* romfs_get_direntry(void* directories, uint32_t offset) {
return (RomFSDirectoryEntry*)((uintptr_t)directories + offset);
}
static inline RomFSFileEntry* romfs_get_fentry(void* files, uint32_t offset) {
return (RomFSFileEntry*)((uintptr_t)files + offset);
}
static inline uint32_t romfs_calc_path_hash(uint32_t parent, const unsigned char* path,
uint32_t start, size_t path_len) {
uint32_t hash = parent ^ 123456789;
for (uint32_t i = 0; i < path_len; i++) {
hash = (hash >> 5) | (hash << 27);
hash ^= path[start + i];
}
return hash;
}
static inline uint32_t romfs_get_hash_table_count(uint32_t num_entries) {
if (num_entries < 3) {
return 3;
} else if (num_entries < 19) {
return num_entries | 1;
}
uint32_t count = num_entries;
while (count % 2 == 0 || count % 3 == 0 || count % 5 == 0 || count % 7 == 0 ||
count % 11 == 0 || count % 13 == 0 || count % 17 == 0) {
count++;
}
return count;
}
} // namespace FileSys
