bunnei
GitHub
commit
7b81e1e525
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/*
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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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#include <cstring>
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#include "common/assert.h"
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#include "core/file_sys/fsmitm_romfsbuild.h"
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#include "core/file_sys/vfs.h"
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#include "core/file_sys/vfs_vector.h"
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namespace FileSys {
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constexpr u64 FS_MAX_PATH = 0x301;
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constexpr u32 ROMFS_ENTRY_EMPTY = 0xFFFFFFFF;
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constexpr u32 ROMFS_FILEPARTITION_OFS = 0x200;
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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, "RomFSHeader has incorrect size.");
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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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};
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static_assert(sizeof(RomFSDirectoryEntry) == 0x18, "RomFSDirectoryEntry has incorrect size.");
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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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};
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static_assert(sizeof(RomFSFileEntry) == 0x20, "RomFSFileEntry has incorrect size.");
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struct RomFSBuildFileContext;
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struct RomFSBuildDirectoryContext {
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std::string path = "";
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u32 cur_path_ofs = 0;
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u32 path_len = 0;
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u32 entry_offset = 0;
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std::shared_ptr<RomFSBuildDirectoryContext> parent;
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std::shared_ptr<RomFSBuildDirectoryContext> child;
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std::shared_ptr<RomFSBuildDirectoryContext> sibling;
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std::shared_ptr<RomFSBuildFileContext> file;
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};
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struct RomFSBuildFileContext {
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std::string path = "";
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u32 cur_path_ofs = 0;
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u32 path_len = 0;
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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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std::shared_ptr<RomFSBuildDirectoryContext> parent;
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std::shared_ptr<RomFSBuildFileContext> sibling;
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VirtualFile source = nullptr;
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RomFSBuildFileContext() : path(""), cur_path_ofs(0), path_len(0) {}
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};
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static u32 romfs_calc_path_hash(u32 parent, std::string path, u32 start, size_t path_len) {
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u32 hash = parent ^ 123456789;
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for (u32 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 u32 romfs_get_hash_table_count(u32 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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u32 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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void RomFSBuildContext::VisitDirectory(VirtualDir root_romfs,
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std::shared_ptr<RomFSBuildDirectoryContext> parent) {
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std::vector<std::shared_ptr<RomFSBuildDirectoryContext>> child_dirs;
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VirtualDir dir;
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if (parent->path_len == 0)
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dir = root_romfs;
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else
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dir = root_romfs->GetDirectoryRelative(parent->path);
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const auto entries = dir->GetEntries();
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for (const auto& kv : entries) {
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if (kv.second == VfsEntryType::Directory) {
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const auto child = std::make_shared<RomFSBuildDirectoryContext>();
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// Set child's path.
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child->cur_path_ofs = parent->path_len + 1;
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child->path_len = child->cur_path_ofs + kv.first.size();
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child->path = parent->path + "/" + kv.first;
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// Sanity check on path_len
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ASSERT(child->path_len < FS_MAX_PATH);
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if (AddDirectory(parent, child)) {
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child_dirs.push_back(child);
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}
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} else {
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const auto child = std::make_shared<RomFSBuildFileContext>();
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// Set child's path.
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child->cur_path_ofs = parent->path_len + 1;
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child->path_len = child->cur_path_ofs + kv.first.size();
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child->path = parent->path + "/" + kv.first;
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// Sanity check on path_len
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ASSERT(child->path_len < FS_MAX_PATH);
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child->source = root_romfs->GetFileRelative(child->path);
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child->size = child->source->GetSize();
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AddFile(parent, child);
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}
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}
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for (auto& child : child_dirs) {
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this->VisitDirectory(root_romfs, child);
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}
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}
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bool RomFSBuildContext::AddDirectory(std::shared_ptr<RomFSBuildDirectoryContext> parent_dir_ctx,
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std::shared_ptr<RomFSBuildDirectoryContext> dir_ctx) {
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// Check whether it's already in the known directories.
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const auto existing = directories.find(dir_ctx->path);
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if (existing != directories.end())
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return false;
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// Add a new directory.
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num_dirs++;
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dir_table_size +=
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sizeof(RomFSDirectoryEntry) + ((dir_ctx->path_len - dir_ctx->cur_path_ofs + 3) & ~3);
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dir_ctx->parent = parent_dir_ctx;
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directories.emplace(dir_ctx->path, dir_ctx);
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return true;
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}
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bool RomFSBuildContext::AddFile(std::shared_ptr<RomFSBuildDirectoryContext> parent_dir_ctx,
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std::shared_ptr<RomFSBuildFileContext> file_ctx) {
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// Check whether it's already in the known files.
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const auto existing = files.find(file_ctx->path);
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if (existing != files.end()) {
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return false;
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}
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// Add a new file.
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num_files++;
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file_table_size +=
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sizeof(RomFSFileEntry) + ((file_ctx->path_len - file_ctx->cur_path_ofs + 3) & ~3);
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file_ctx->parent = parent_dir_ctx;
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files.emplace(file_ctx->path, file_ctx);
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return true;
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}
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RomFSBuildContext::RomFSBuildContext(VirtualDir base_) : base(std::move(base_)) {
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root = std::make_shared<RomFSBuildDirectoryContext>();
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root->path = "\0";
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directories.emplace(root->path, root);
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num_dirs = 1;
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dir_table_size = 0x18;
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VisitDirectory(base, root);
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}
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RomFSBuildContext::~RomFSBuildContext() = default;
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std::map<u64, VirtualFile> RomFSBuildContext::Build() {
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const auto dir_hash_table_entry_count = romfs_get_hash_table_count(num_dirs);
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const auto file_hash_table_entry_count = romfs_get_hash_table_count(num_files);
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dir_hash_table_size = 4 * dir_hash_table_entry_count;
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file_hash_table_size = 4 * file_hash_table_entry_count;
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// Assign metadata pointers
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RomFSHeader header{};
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std::vector<u32> dir_hash_table(dir_hash_table_entry_count, ROMFS_ENTRY_EMPTY);
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std::vector<u32> file_hash_table(file_hash_table_entry_count, ROMFS_ENTRY_EMPTY);
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std::vector<u8> dir_table(dir_table_size);
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std::vector<u8> file_table(file_table_size);
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// Clear out hash tables.
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for (u32 i = 0; i < dir_hash_table_entry_count; i++)
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dir_hash_table[i] = ROMFS_ENTRY_EMPTY;
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for (u32 i = 0; i < file_hash_table_entry_count; i++)
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file_hash_table[i] = ROMFS_ENTRY_EMPTY;
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std::shared_ptr<RomFSBuildFileContext> cur_file;
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// Determine file offsets.
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u32 entry_offset = 0;
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std::shared_ptr<RomFSBuildFileContext> prev_file = nullptr;
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for (const auto& it : files) {
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cur_file = it.second;
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file_partition_size = (file_partition_size + 0xFULL) & ~0xFULL;
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cur_file->offset = file_partition_size;
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file_partition_size += cur_file->size;
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cur_file->entry_offset = entry_offset;
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entry_offset +=
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sizeof(RomFSFileEntry) + ((cur_file->path_len - cur_file->cur_path_ofs + 3) & ~3);
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prev_file = cur_file;
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}
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// Assign deferred parent/sibling ownership.
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for (auto it = files.rbegin(); it != files.rend(); ++it) {
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cur_file = it->second;
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cur_file->sibling = cur_file->parent->file;
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cur_file->parent->file = cur_file;
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}
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std::shared_ptr<RomFSBuildDirectoryContext> cur_dir;
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// Determine directory offsets.
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entry_offset = 0;
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for (const auto& it : directories) {
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cur_dir = it.second;
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cur_dir->entry_offset = entry_offset;
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entry_offset +=
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sizeof(RomFSDirectoryEntry) + ((cur_dir->path_len - cur_dir->cur_path_ofs + 3) & ~3);
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}
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// Assign deferred parent/sibling ownership.
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for (auto it = directories.rbegin(); it->second != root; ++it) {
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cur_dir = it->second;
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cur_dir->sibling = cur_dir->parent->child;
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cur_dir->parent->child = cur_dir;
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}
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std::map<u64, VirtualFile> out;
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// Populate file tables.
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for (const auto& it : files) {
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cur_file = it.second;
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RomFSFileEntry cur_entry{};
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cur_entry.parent = cur_file->parent->entry_offset;
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cur_entry.sibling =
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cur_file->sibling == nullptr ? ROMFS_ENTRY_EMPTY : cur_file->sibling->entry_offset;
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cur_entry.offset = cur_file->offset;
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cur_entry.size = cur_file->size;
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const auto name_size = cur_file->path_len - cur_file->cur_path_ofs;
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const auto hash = romfs_calc_path_hash(cur_file->parent->entry_offset, cur_file->path,
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cur_file->cur_path_ofs, name_size);
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cur_entry.hash = file_hash_table[hash % file_hash_table_entry_count];
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file_hash_table[hash % file_hash_table_entry_count] = cur_file->entry_offset;
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cur_entry.name_size = name_size;
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out.emplace(cur_file->offset + ROMFS_FILEPARTITION_OFS, cur_file->source);
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std::memcpy(file_table.data() + cur_file->entry_offset, &cur_entry, sizeof(RomFSFileEntry));
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std::memset(file_table.data() + cur_file->entry_offset + sizeof(RomFSFileEntry), 0,
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(cur_entry.name_size + 3) & ~3);
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std::memcpy(file_table.data() + cur_file->entry_offset + sizeof(RomFSFileEntry),
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cur_file->path.data() + cur_file->cur_path_ofs, name_size);
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}
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// Populate dir tables.
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for (const auto& it : directories) {
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cur_dir = it.second;
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RomFSDirectoryEntry cur_entry{};
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cur_entry.parent = cur_dir == root ? 0 : cur_dir->parent->entry_offset;
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cur_entry.sibling =
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cur_dir->sibling == nullptr ? ROMFS_ENTRY_EMPTY : cur_dir->sibling->entry_offset;
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cur_entry.child =
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cur_dir->child == nullptr ? ROMFS_ENTRY_EMPTY : cur_dir->child->entry_offset;
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cur_entry.file = cur_dir->file == nullptr ? ROMFS_ENTRY_EMPTY : cur_dir->file->entry_offset;
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const auto name_size = cur_dir->path_len - cur_dir->cur_path_ofs;
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const auto hash = romfs_calc_path_hash(cur_dir == root ? 0 : cur_dir->parent->entry_offset,
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cur_dir->path, cur_dir->cur_path_ofs, name_size);
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cur_entry.hash = dir_hash_table[hash % dir_hash_table_entry_count];
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dir_hash_table[hash % dir_hash_table_entry_count] = cur_dir->entry_offset;
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cur_entry.name_size = name_size;
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std::memcpy(dir_table.data() + cur_dir->entry_offset, &cur_entry,
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sizeof(RomFSDirectoryEntry));
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std::memcpy(dir_table.data() + cur_dir->entry_offset, &cur_entry,
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sizeof(RomFSDirectoryEntry));
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std::memset(dir_table.data() + cur_dir->entry_offset + sizeof(RomFSDirectoryEntry), 0,
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(cur_entry.name_size + 3) & ~3);
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std::memcpy(dir_table.data() + cur_dir->entry_offset + sizeof(RomFSDirectoryEntry),
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cur_dir->path.data() + cur_dir->cur_path_ofs, name_size);
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}
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// Set header fields.
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header.header_size = sizeof(RomFSHeader);
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header.file_hash_table_size = file_hash_table_size;
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header.file_table_size = file_table_size;
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header.dir_hash_table_size = dir_hash_table_size;
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header.dir_table_size = dir_table_size;
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header.file_partition_ofs = ROMFS_FILEPARTITION_OFS;
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header.dir_hash_table_ofs = (header.file_partition_ofs + file_partition_size + 3ULL) & ~3ULL;
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header.dir_table_ofs = header.dir_hash_table_ofs + header.dir_hash_table_size;
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header.file_hash_table_ofs = header.dir_table_ofs + header.dir_table_size;
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header.file_table_ofs = header.file_hash_table_ofs + header.file_hash_table_size;
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std::vector<u8> header_data(sizeof(RomFSHeader));
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std::memcpy(header_data.data(), &header, header_data.size());
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out.emplace(0, std::make_shared<VectorVfsFile>(header_data));
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std::vector<u8> metadata(file_hash_table_size + file_table_size + dir_hash_table_size +
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dir_table_size);
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auto index = 0;
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std::memcpy(metadata.data(), dir_hash_table.data(), dir_hash_table.size() * sizeof(u32));
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index += dir_hash_table.size() * sizeof(u32);
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std::memcpy(metadata.data() + index, dir_table.data(), dir_table.size());
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index += dir_table.size();
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std::memcpy(metadata.data() + index, file_hash_table.data(),
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file_hash_table.size() * sizeof(u32));
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index += file_hash_table.size() * sizeof(u32);
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std::memcpy(metadata.data() + index, file_table.data(), file_table.size());
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out.emplace(header.dir_hash_table_ofs, std::make_shared<VectorVfsFile>(metadata));
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return out;
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}
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} // namespace FileSys
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@ -0,0 +1,70 @@
|
||||
/*
|
||||
* 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
|
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
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*/
|
||||
|
||||
/*
|
||||
* 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.
|
||||
*/
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#pragma once
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#include <map>
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#include <memory>
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#include <string>
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#include <boost/detail/container_fwd.hpp>
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#include "common/common_types.h"
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#include "core/file_sys/vfs.h"
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namespace FileSys {
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||||
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struct RomFSBuildDirectoryContext;
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struct RomFSBuildFileContext;
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struct RomFSDirectoryEntry;
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struct RomFSFileEntry;
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class RomFSBuildContext {
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public:
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explicit RomFSBuildContext(VirtualDir base);
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~RomFSBuildContext();
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// This finalizes the context.
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std::map<u64, VirtualFile> Build();
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private:
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VirtualDir base;
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std::shared_ptr<RomFSBuildDirectoryContext> root;
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std::map<std::string, std::shared_ptr<RomFSBuildDirectoryContext>, std::less<>> directories;
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std::map<std::string, std::shared_ptr<RomFSBuildFileContext>, std::less<>> 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;
|
||||
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, std::shared_ptr<RomFSBuildDirectoryContext> parent);
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||||
|
||||
bool AddDirectory(std::shared_ptr<RomFSBuildDirectoryContext> parent_dir_ctx,
|
||||
std::shared_ptr<RomFSBuildDirectoryContext> dir_ctx);
|
||||
bool AddFile(std::shared_ptr<RomFSBuildDirectoryContext> parent_dir_ctx,
|
||||
std::shared_ptr<RomFSBuildFileContext> file_ctx);
|
||||
};
|
||||
|
||||
} // namespace FileSys
|
||||
@ -0,0 +1,131 @@
|
||||
// Copyright 2018 yuzu emulator team
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <algorithm>
|
||||
#include <utility>
|
||||
#include "core/file_sys/vfs_layered.h"
|
||||
|
||||
namespace FileSys {
|
||||
|
||||
VirtualDir LayerDirectories(std::vector<VirtualDir> dirs, std::string name) {
|
||||
if (dirs.empty())
|
||||
return nullptr;
|
||||
if (dirs.size() == 1)
|
||||
return dirs[0];
|
||||
|
||||
return std::shared_ptr<VfsDirectory>(new LayeredVfsDirectory(std::move(dirs), std::move(name)));
|
||||
}
|
||||
|
||||
LayeredVfsDirectory::LayeredVfsDirectory(std::vector<VirtualDir> dirs, std::string name)
|
||||
: dirs(std::move(dirs)), name(std::move(name)) {}
|
||||
|
||||
LayeredVfsDirectory::~LayeredVfsDirectory() = default;
|
||||
|
||||
std::shared_ptr<VfsFile> LayeredVfsDirectory::GetFileRelative(std::string_view path) const {
|
||||
for (const auto& layer : dirs) {
|
||||
const auto file = layer->GetFileRelative(path);
|
||||
if (file != nullptr)
|
||||
return file;
|
||||
}
|
||||
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
std::shared_ptr<VfsDirectory> LayeredVfsDirectory::GetDirectoryRelative(
|
||||
std::string_view path) const {
|
||||
std::vector<VirtualDir> out;
|
||||
for (const auto& layer : dirs) {
|
||||
auto dir = layer->GetDirectoryRelative(path);
|
||||
if (dir != nullptr)
|
||||
out.push_back(std::move(dir));
|
||||
}
|
||||
|
||||
return LayerDirectories(std::move(out));
|
||||
}
|
||||
|
||||
std::shared_ptr<VfsFile> LayeredVfsDirectory::GetFile(std::string_view name) const {
|
||||
return GetFileRelative(name);
|
||||
}
|
||||
|
||||
std::shared_ptr<VfsDirectory> LayeredVfsDirectory::GetSubdirectory(std::string_view name) const {
|
||||
return GetDirectoryRelative(name);
|
||||
}
|
||||
|
||||
std::string LayeredVfsDirectory::GetFullPath() const {
|
||||
return dirs[0]->GetFullPath();
|
||||
}
|
||||
|
||||
std::vector<std::shared_ptr<VfsFile>> LayeredVfsDirectory::GetFiles() const {
|
||||
std::vector<VirtualFile> out;
|
||||
for (const auto& layer : dirs) {
|
||||
for (const auto& file : layer->GetFiles()) {
|
||||
if (std::find_if(out.begin(), out.end(), [&file](const VirtualFile& comp) {
|
||||
return comp->GetName() == file->GetName();
|
||||
}) == out.end()) {
|
||||
out.push_back(file);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return out;
|
||||
}
|
||||
|
||||
std::vector<std::shared_ptr<VfsDirectory>> LayeredVfsDirectory::GetSubdirectories() const {
|
||||
std::vector<std::string> names;
|
||||
for (const auto& layer : dirs) {
|
||||
for (const auto& sd : layer->GetSubdirectories()) {
|
||||
if (std::find(names.begin(), names.end(), sd->GetName()) == names.end())
|
||||
names.push_back(sd->GetName());
|
||||
}
|
||||
}
|
||||
|
||||
std::vector<VirtualDir> out;
|
||||
out.reserve(names.size());
|
||||
for (const auto& subdir : names)
|
||||
out.push_back(GetSubdirectory(subdir));
|
||||
|
||||
return out;
|
||||
}
|
||||
|
||||
bool LayeredVfsDirectory::IsWritable() const {
|
||||
return false;
|
||||
}
|
||||
|
||||
bool LayeredVfsDirectory::IsReadable() const {
|
||||
return true;
|
||||
}
|
||||
|
||||
std::string LayeredVfsDirectory::GetName() const {
|
||||
return name.empty() ? dirs[0]->GetName() : name;
|
||||
}
|
||||
|
||||
std::shared_ptr<VfsDirectory> LayeredVfsDirectory::GetParentDirectory() const {
|
||||
return dirs[0]->GetParentDirectory();
|
||||
}
|
||||
|
||||
std::shared_ptr<VfsDirectory> LayeredVfsDirectory::CreateSubdirectory(std::string_view name) {
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
std::shared_ptr<VfsFile> LayeredVfsDirectory::CreateFile(std::string_view name) {
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
bool LayeredVfsDirectory::DeleteSubdirectory(std::string_view name) {
|
||||
return false;
|
||||
}
|
||||
|
||||
bool LayeredVfsDirectory::DeleteFile(std::string_view name) {
|
||||
return false;
|
||||
}
|
||||
|
||||
bool LayeredVfsDirectory::Rename(std::string_view name_) {
|
||||
name = name_;
|
||||
return true;
|
||||
}
|
||||
|
||||
bool LayeredVfsDirectory::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
|
||||
return false;
|
||||
}
|
||||
} // namespace FileSys
|
||||
@ -0,0 +1,52 @@
|
||||
// Copyright 2018 yuzu emulator team
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <memory>
|
||||
#include "core/file_sys/vfs.h"
|
||||
|
||||
namespace FileSys {
|
||||
|
||||
// Wrapper function to allow for more efficient handling of dirs.size() == 0, 1 cases.
|
||||
VirtualDir LayerDirectories(std::vector<VirtualDir> dirs, std::string name = "");
|
||||
|
||||
// Class that stacks multiple VfsDirectories on top of each other, attempting to read from the first
|
||||
// one and falling back to the one after. The highest priority directory (overwrites all others)
|
||||
// should be element 0 in the dirs vector.
|
||||
class LayeredVfsDirectory : public VfsDirectory {
|
||||
friend VirtualDir LayerDirectories(std::vector<VirtualDir> dirs, std::string name);
|
||||
|
||||
LayeredVfsDirectory(std::vector<VirtualDir> dirs, std::string name);
|
||||
|
||||
public:
|
||||
~LayeredVfsDirectory() override;
|
||||
|
||||
std::shared_ptr<VfsFile> GetFileRelative(std::string_view path) const override;
|
||||
std::shared_ptr<VfsDirectory> GetDirectoryRelative(std::string_view path) const override;
|
||||
std::shared_ptr<VfsFile> GetFile(std::string_view name) const override;
|
||||
std::shared_ptr<VfsDirectory> GetSubdirectory(std::string_view name) const override;
|
||||
std::string GetFullPath() const override;
|
||||
|
||||
std::vector<std::shared_ptr<VfsFile>> GetFiles() const override;
|
||||
std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const override;
|
||||
bool IsWritable() const override;
|
||||
bool IsReadable() const override;
|
||||
std::string GetName() const override;
|
||||
std::shared_ptr<VfsDirectory> GetParentDirectory() const override;
|
||||
std::shared_ptr<VfsDirectory> CreateSubdirectory(std::string_view name) override;
|
||||
std::shared_ptr<VfsFile> CreateFile(std::string_view name) override;
|
||||
bool DeleteSubdirectory(std::string_view name) override;
|
||||
bool DeleteFile(std::string_view name) override;
|
||||
bool Rename(std::string_view name) override;
|
||||
|
||||
protected:
|
||||
bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override;
|
||||
|
||||
private:
|
||||
std::vector<VirtualDir> dirs;
|
||||
std::string name;
|
||||
};
|
||||
|
||||
} // namespace FileSys
|
||||
@ -0,0 +1,78 @@
|
||||
// Copyright 2018 yuzu emulator team
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <algorithm>
|
||||
#include <memory>
|
||||
#include <string_view>
|
||||
|
||||
#include "core/file_sys/vfs.h"
|
||||
|
||||
namespace FileSys {
|
||||
|
||||
template <u8 value>
|
||||
class StaticVfsFile : public VfsFile {
|
||||
public:
|
||||
explicit StaticVfsFile(size_t size = 0, std::string name = "", VirtualDir parent = nullptr)
|
||||
: size(size), name(std::move(name)), parent(std::move(parent)) {}
|
||||
|
||||
std::string GetName() const override {
|
||||
return name;
|
||||
}
|
||||
|
||||
size_t GetSize() const override {
|
||||
return size;
|
||||
}
|
||||
|
||||
bool Resize(size_t new_size) override {
|
||||
size = new_size;
|
||||
return true;
|
||||
}
|
||||
|
||||
std::shared_ptr<VfsDirectory> GetContainingDirectory() const override {
|
||||
return parent;
|
||||
}
|
||||
|
||||
bool IsWritable() const override {
|
||||
return false;
|
||||
}
|
||||
|
||||
bool IsReadable() const override {
|
||||
return true;
|
||||
}
|
||||
|
||||
size_t Read(u8* data, size_t length, size_t offset) const override {
|
||||
const auto read = std::min(length, size - offset);
|
||||
std::fill(data, data + read, value);
|
||||
return read;
|
||||
}
|
||||
|
||||
size_t Write(const u8* data, size_t length, size_t offset) override {
|
||||
return 0;
|
||||
}
|
||||
|
||||
boost::optional<u8> ReadByte(size_t offset) const override {
|
||||
if (offset < size)
|
||||
return value;
|
||||
return boost::none;
|
||||
}
|
||||
|
||||
std::vector<u8> ReadBytes(size_t length, size_t offset) const override {
|
||||
const auto read = std::min(length, size - offset);
|
||||
return std::vector<u8>(read, value);
|
||||
}
|
||||
|
||||
bool Rename(std::string_view new_name) override {
|
||||
name = new_name;
|
||||
return true;
|
||||
}
|
||||
|
||||
private:
|
||||
size_t size;
|
||||
std::string name;
|
||||
VirtualDir parent;
|
||||
};
|
||||
|
||||
} // namespace FileSys
|
||||
Loading…
Reference in New Issue