2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
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:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
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
27 abstract class CodeElement {
29 internal int Address { get; set; }
31 internal int LastLength { get; set; }
33 // internal abstract int Length { get; }
35 internal CodeElement()
40 internal virtual void SetJumpTarget(CodeElement target)
42 throw new Exception("Code element accepts no target");
45 internal abstract int GetLength(bool oneByteCode);
47 internal abstract int Encode(BlobWriter bw, bool oneByteCode);
49 internal static int EncodeOneByte(uint val, BlobWriter bw)
52 throw new Exception(string.Format(
53 "Cannot encode '{0}' over one byte", val));
59 internal static int Encode7EUnsigned(uint val, BlobWriter bw)
62 for (uint w = val; w >= 0x80; w >>= 7) {
66 for (int k = (len - 1) * 7; k >= 0; k -= 7) {
67 int x = (int)(val >> k) & 0x7F;
77 internal static int Encode7ESigned(int val, BlobWriter bw)
81 for (int w = val; w < -0x40; w >>= 7) {
85 for (int w = val; w >= 0x40; w >>= 7) {
90 for (int k = (len - 1) * 7; k >= 0; k -= 7) {
91 int x = (int)(val >> k) & 0x7F;