/* * Copyright (c) 2016 Thomas Pornin * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ using System; class CodeElementJump : CodeElement { uint jumpType; CodeElement target; internal CodeElementJump(uint jumpType) { this.jumpType = jumpType; } /* obsolete internal override int Length { get { int len = Encode7EUnsigned(jumpType, null); int joff = JumpOff; if (joff == Int32.MinValue) { len ++; } else { len += Encode7ESigned(joff, null); } return len; } } */ internal override int GetLength(bool oneByteCode) { int len = oneByteCode ? 1 : Encode7EUnsigned(jumpType, null); int joff = JumpOff; if (joff == Int32.MinValue) { len ++; } else { len += Encode7ESigned(joff, null); } return len; } internal override void SetJumpTarget(CodeElement target) { this.target = target; } int JumpOff { get { if (target == null || Address < 0 || target.Address < 0) { return Int32.MinValue; } else { return target.Address - (Address + LastLength); } } } internal override int Encode(BlobWriter bw, bool oneByteCode) { if (bw == null) { return GetLength(oneByteCode); } int len; if (oneByteCode) { len = EncodeOneByte(jumpType, bw); } else { len = Encode7EUnsigned(jumpType, bw); } int joff = JumpOff; if (joff == Int32.MinValue) { throw new Exception("Unresolved addresses"); } return len + Encode7ESigned(joff, bw); } }