summaryrefslogtreecommitdiffstats
path: root/src/core/file_sys/vfs/vfs_layered.cpp
blob: 47b2a3c780c092198e6e4ff857a6c9a024f14d94 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include <algorithm>
#include <set>
#include <unordered_set>
#include <utility>
#include "core/file_sys/vfs/vfs_layered.h"

namespace FileSys {

LayeredVfsDirectory::LayeredVfsDirectory(std::vector<VirtualDir> dirs_, std::string name_)
    : dirs(std::move(dirs_)), name(std::move(name_)) {}

LayeredVfsDirectory::~LayeredVfsDirectory() = default;

VirtualDir LayeredVfsDirectory::MakeLayeredDirectory(std::vector<VirtualDir> dirs,
                                                     std::string name) {
    if (dirs.empty())
        return nullptr;
    if (dirs.size() == 1)
        return dirs[0];

    return VirtualDir(new LayeredVfsDirectory(std::move(dirs), std::move(name)));
}

VirtualFile 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;
}

VirtualDir 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.emplace_back(std::move(dir));
        }
    }

    return MakeLayeredDirectory(std::move(out));
}

VirtualFile LayeredVfsDirectory::GetFile(std::string_view file_name) const {
    return GetFileRelative(file_name);
}

VirtualDir LayeredVfsDirectory::GetSubdirectory(std::string_view subdir_name) const {
    return GetDirectoryRelative(subdir_name);
}

std::string LayeredVfsDirectory::GetFullPath() const {
    return dirs[0]->GetFullPath();
}

std::vector<VirtualFile> LayeredVfsDirectory::GetFiles() const {
    std::vector<VirtualFile> out;
    std::unordered_set<std::string> out_names;

    for (const auto& layer : dirs) {
        for (auto& file : layer->GetFiles()) {
            const auto [it, is_new] = out_names.emplace(file->GetName());
            if (is_new) {
                out.emplace_back(std::move(file));
            }
        }
    }

    return out;
}

std::vector<VirtualDir> LayeredVfsDirectory::GetSubdirectories() const {
    std::vector<VirtualDir> out;
    std::unordered_set<std::string> out_names;

    for (const auto& layer : dirs) {
        for (const auto& sd : layer->GetSubdirectories()) {
            out_names.emplace(sd->GetName());
        }
    }

    out.reserve(out_names.size());
    for (const auto& subdir : out_names) {
        out.emplace_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;
}

VirtualDir LayeredVfsDirectory::GetParentDirectory() const {
    return dirs[0]->GetParentDirectory();
}

VirtualDir LayeredVfsDirectory::CreateSubdirectory(std::string_view subdir_name) {
    return nullptr;
}

VirtualFile LayeredVfsDirectory::CreateFile(std::string_view file_name) {
    return nullptr;
}

bool LayeredVfsDirectory::DeleteSubdirectory(std::string_view subdir_name) {
    return false;
}

bool LayeredVfsDirectory::DeleteFile(std::string_view file_name) {
    return false;
}

bool LayeredVfsDirectory::Rename(std::string_view new_name) {
    name = new_name;
    return true;
}

} // namespace FileSys