95 lines
3.0 KiB
C#
95 lines
3.0 KiB
C#
// Copyright 2025 Code Philosophy
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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using dnlib.DotNet;
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using dnlib.DotNet.Emit;
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using System;
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using System.Collections.Generic;
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namespace Obfuz.Emit
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{
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class ScopeLocalVariables : IDisposable
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{
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private readonly LocalVariableAllocator _localVariableAllocator;
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private readonly List<Local> _allocatedVars = new List<Local>();
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public IReadOnlyList<Local> AllocatedLocals => _allocatedVars;
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public ScopeLocalVariables(LocalVariableAllocator localVariableAllocator)
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{
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_localVariableAllocator = localVariableAllocator;
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}
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public Local AllocateLocal(TypeSig type)
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{
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var local = _localVariableAllocator.AllocateLocal(type);
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_allocatedVars.Add(local);
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return local;
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}
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public void Dispose()
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{
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foreach (var local in _allocatedVars)
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{
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_localVariableAllocator.ReturnLocal(local);
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}
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}
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}
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class LocalVariableAllocator
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{
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private readonly MethodDef _method;
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private readonly List<Local> _freeLocals = new List<Local>();
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public LocalVariableAllocator(MethodDef method)
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{
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_method = method;
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}
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public Local AllocateLocal(TypeSig type)
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{
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foreach (var local in _freeLocals)
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{
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if (TypeEqualityComparer.Instance.Equals(local.Type, type))
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{
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_freeLocals.Remove(local);
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return local;
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}
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}
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var newLocal = new Local(type);
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// _freeLocals.Add(newLocal);
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_method.Body.Variables.Add(newLocal);
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return newLocal;
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}
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public void ReturnLocal(Local local)
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{
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_freeLocals.Add(local);
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}
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public ScopeLocalVariables CreateScope()
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{
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return new ScopeLocalVariables(this);
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}
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}
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}
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