Small improvement to tolerate PEM files missing the terminating newline in the brssl...
[BearSSL] / T0 / WordData.cs
1 /*
2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 using System;
26 using System.Collections.Generic;
27
28 class WordData : Word {
29
30 ConstData blob;
31 string baseBlobName;
32 int offset;
33 bool ongoingResolution;
34
35 internal WordData(T0Comp owner, string name,
36 ConstData blob, int offset)
37 : base(owner, name)
38 {
39 this.blob = blob;
40 this.offset = offset;
41 StackEffect = new SType(0, 1);
42 }
43
44 internal WordData(T0Comp owner, string name,
45 string baseBlobName, int offset)
46 : base(owner, name)
47 {
48 this.baseBlobName = baseBlobName;
49 this.offset = offset;
50 StackEffect = new SType(0, 1);
51 }
52
53 internal override void Resolve()
54 {
55 if (blob != null) {
56 return;
57 }
58 if (ongoingResolution) {
59 throw new Exception(String.Format(
60 "circular reference in blobs ({0})", Name));
61 }
62 ongoingResolution = true;
63 WordData wd = TC.Lookup(baseBlobName) as WordData;
64 if (wd == null) {
65 throw new Exception(String.Format(
66 "data word '{0}' based on non-data word '{1}'",
67 Name, baseBlobName));
68 }
69 wd.Resolve();
70 blob = wd.blob;
71 offset += wd.offset;
72 ongoingResolution = false;
73 }
74
75 internal override void Run(CPU cpu)
76 {
77 Resolve();
78 cpu.Push(new TValue(offset, new TPointerBlob(blob)));
79 }
80
81 internal override List<ConstData> GetDataBlocks()
82 {
83 Resolve();
84 List<ConstData> r = new List<ConstData>();
85 r.Add(blob);
86 return r;
87 }
88
89 internal override void GenerateCodeElements(List<CodeElement> dst)
90 {
91 Resolve();
92 dst.Add(new CodeElementUInt(0));
93 dst.Add(new CodeElementUIntInt(1, blob.Address + offset));
94 dst.Add(new CodeElementUInt(0));
95 }
96 }