ppc.backend.loaders.ppc source code

1 /**
2 Copyright (c) 2018 Clipsey (clipseypone@gmail.com)
3 
4 Permission is hereby granted, free of charge, to any person or organization
5 obtaining a copy of the software and accompanying documentation covered by
6 this license (the "Software") to use, reproduce, display, distribute,
7 execute, and transmit the Software, and to prepare derivative works of the
8 Software, and to permit third-parties to whom the Software is furnished to
9 do so, all subject to the following:
10 
11 The copyright notices in the Software and this entire statement, including
12 the above license grant, this restriction and the following disclaimer,
13 must be included in all copies of the Software, in whole or in part, and
14 all derivative works of the Software, unless such copies or derivative
15 works are solely in the form of machine-executable object code generated by
16 a source language processor.
17 
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
21 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
22 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
23 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24 DEALINGS IN THE SOFTWARE.
25 */
26 module ppc.backend.loaders.ppc;
27 import ppc.backend;
28 import ppc.backend.cfile;
29 import ppc.backend.signatures;
30 import ppc.exceptions;
31 import ppc.types;
32 
33 const uint PPCLoaderVersion = 1;
34 
35 public struct PPC {
36 private:
37     ubyte   [  ]    dataStr;
38 
39 public:
40     /// Version of the PPC file
41     uint            version_;
42 
43     /// Content type of the internal content
44     Types     contentType;
45 
46     /// Options for the file
47     ulong           options;
48 
49     /// Author of the file
50     char    [32]    author;
51 
52     /// License of the content
53     char    [16]    license;
54 
55     /// The content data
56     MemFile data;
57 
58     void setData(ubyte[] data) {
59         this.dataStr = data;
60     }
61 
62     /// Create a new PPC file from file
63     this(string file) {
64         MemFile mf = loadFile(file);
65         this(mf);
66     }
67 
68     /// Create a new PPC file from memory
69     this(MemFile file) {
70         import std.stdio;
71         // Throw exception if not PPC file
72         if (!file.hasSignature(FileSignature.ContainerPPC)) 
73             throw new InvalidMagicBytesException("ppc");
74 
75         // Skip the file signature
76         file.seek(&file, FileSignature.ContainerPPC.length, SeekStart);
77 
78         // Read all the data into the variables.
79         file.read(&version_, uint.sizeof, 1, &file);
80         file.read(&options, ulong.sizeof, 1, &file);
81         file.read(&contentType, ubyte.sizeof, 1, &file);
82         file.read(&author, char.sizeof, 32, &file);
83         file.read(&license, char.sizeof, 16, &file);
84         dataStr = new ubyte[file.length - file.tell(&file)];
85         file.read(dataStr.ptr, ubyte.sizeof, file.length - file.tell(&file), &file);
86 
87 
88         // Set up pointer to internal data
89         data.arrayptr = dataStr.ptr;
90         data.readhead = data.arrayptr;
91         data.length = dataStr.length;
92 
93         // Destroy the ppc file from memory since we already have the needed data.
94         destroy(file);
95     }
96 }
97 
98 //  TODO: Replace this with some prettier code
99 /// Returns a writable PPC file as a ubyte array
100 ubyte[] savePPC(PPC ppc) {
101     MemFile mf;
102     // Write file signature.
103     mf.write(WritableFileSigs.ContainerPPC.ptr, WritableFileSigs.ContainerPPC.length, 1, &mf);
104     mf.write(&ppc.version_, uint.sizeof, 1, &mf);
105     mf.write(&ppc.options, ulong.sizeof, 1, &mf);
106     mf.write(&ppc.contentType, ubyte.sizeof, 1, &mf);
107     mf.write(&ppc.author, char.sizeof, 32, &mf);
108     mf.write(&ppc.license, char.sizeof, 16, &mf);
109     mf.write(ppc.dataStr.ptr, ubyte.sizeof, ppc.dataStr.length, &mf);
110     return mf.toArray;
111 }