Added RSA key generation code (i15, i31, i62).
[BearSSL] / T0 / CodeElementJump.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
27 class CodeElementJump : CodeElement {
28
29 uint jumpType;
30 CodeElement target;
31
32 internal CodeElementJump(uint jumpType)
33 {
34 this.jumpType = jumpType;
35 }
36
37 /* obsolete
38 internal override int Length {
39 get {
40 int len = Encode7EUnsigned(jumpType, null);
41 int joff = JumpOff;
42 if (joff == Int32.MinValue) {
43 len ++;
44 } else {
45 len += Encode7ESigned(joff, null);
46 }
47 return len;
48 }
49 }
50 */
51
52 internal override int GetLength(bool oneByteCode)
53 {
54 int len = oneByteCode ? 1 : Encode7EUnsigned(jumpType, null);
55 int joff = JumpOff;
56 if (joff == Int32.MinValue) {
57 len ++;
58 } else {
59 len += Encode7ESigned(joff, null);
60 }
61 return len;
62 }
63
64 internal override void SetJumpTarget(CodeElement target)
65 {
66 this.target = target;
67 }
68
69 int JumpOff {
70 get {
71 if (target == null || Address < 0 || target.Address < 0)
72 {
73 return Int32.MinValue;
74 } else {
75 return target.Address - (Address + LastLength);
76 }
77 }
78 }
79
80 internal override int Encode(BlobWriter bw, bool oneByteCode)
81 {
82 if (bw == null) {
83 return GetLength(oneByteCode);
84 }
85 int len;
86 if (oneByteCode) {
87 len = EncodeOneByte(jumpType, bw);
88 } else {
89 len = Encode7EUnsigned(jumpType, bw);
90 }
91 int joff = JumpOff;
92 if (joff == Int32.MinValue) {
93 throw new Exception("Unresolved addresses");
94 }
95 return len + Encode7ESigned(joff, bw);
96 }
97 }