dgl.vfs.vfs source code

1 /*
2 Copyright (c) 2014-2015 Timur Gafarov
3 
4 Boost Software License - Version 1.0 - August 17th, 2003
5 
6 Permission is hereby granted, free of charge, to any person or organization
7 obtaining a copy of the software and accompanying documentation covered by
8 this license (the "Software") to use, reproduce, display, distribute,
9 execute, and transmit the Software, and to prepare derivative works of the
10 Software, and to permit third-parties to whom the Software is furnished to
11 do so, all subject to the following:
12 
13 The copyright notices in the Software and this entire statement, including
14 the above license grant, this restriction and the following disclaimer,
15 must be included in all copies of the Software, in whole or in part, and
16 all derivative works of the Software, unless such copies or derivative
17 works are solely in the form of machine-executable object code generated by
18 a source language processor.
19 
20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
23 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
24 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
25 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 DEALINGS IN THE SOFTWARE.
27 */
28 
29 module dgl.vfs.vfs;
30 
31 import std.string;
32 import dlib.core.memory;
33 import dlib.core.stream;
34 import dlib.container.array;
35 import dlib.filesystem.filesystem;
36 import dlib.filesystem.stdfs;
37 
38 class StdDirFileSystem: ReadOnlyFileSystem, Freeable
39 {
40     StdFileSystem stdfs;
41     string rootDir;
42 
43     this(string rootDir)
44     {
45         this.rootDir = rootDir;
46         stdfs = New!StdFileSystem();
47     }
48 
49     bool stat(string filename, out FileStat stat)
50     {
51         string path = format("%s/%s", rootDir, filename);
52         return stdfs.stat(path, stat);
53     }
54 
55     InputStream openForInput(string filename)
56     {
57         string path = format("%s/%s", rootDir, filename);
58         return stdfs.openForInput(path);
59     }
60 
61     Directory openDir(string dir)
62     {
63         string path = format("%s/%s", rootDir, dir);
64         return stdfs.openDir(path);
65     }
66 
67     ~this()
68     {
69         Delete(stdfs);
70     }
71 
72     void free()
73     {
74         Delete(this);
75     }
76 }
77 
78 class VirtualFileSystem: ReadOnlyFileSystem, Freeable
79 {
80     DynamicArray!StdDirFileSystem mounted;
81 
82     void mount(string dir)
83     {
84         StdDirFileSystem fs = New!StdDirFileSystem(dir);
85         mounted.append(fs);
86     }
87 
88     bool stat(string filename, out FileStat stat)
89     {
90         //filename = normalizePath(filename);
91         foreach(i, fs; mounted.data)
92         {
93             FileStat s;
94             if (fs.stat(filename, s))
95             {
96                 stat = s;
97                 return true;
98             }
99         }
100 
101         return false;
102     }
103 
104     InputStream openForInput(string filename)
105     {
106         //filename = normalizePath(filename);
107         foreach(i, fs; mounted.data)
108         {
109             FileStat s;
110             if (fs.stat(filename, s))
111                 return fs.openForInput(filename);
112         }
113 
114         return null;
115     }
116 
117     Directory openDir(string path)
118     {
119         // TODO
120         return null;
121     }
122 
123     ~this()
124     {
125         foreach(i, fs; mounted.data)
126             fs.free();
127         mounted.free();
128     }
129 
130     void free()
131     {
132         Delete(this);
133     }
134 }