78 lines
3.1 KiB
C#
78 lines
3.1 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 System.Collections.Generic;
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using System.Text;
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namespace Obfuz.ObfusPasses.SymbolObfus.NameMakers
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{
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public class NameScope : NameScopeBase
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{
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private readonly string _namePrefix;
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private readonly List<string> _wordSet;
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private readonly System.Random _random;
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private readonly int _nameSpace;
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private int _nextIndex;
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public NameScope(string namePrefix, List<string> wordSet) : this(namePrefix, wordSet, 0)
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{
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}
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// A zero seed keeps the original deterministic base-N counter. Any other seed draws
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// names at random from a space wide enough that collisions are rare; NameScopeBase
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// retries on collision, so correctness does not depend on the space being large.
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public NameScope(string namePrefix, List<string> wordSet, int seed)
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{
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_namePrefix = namePrefix;
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_wordSet = wordSet;
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_nextIndex = 0;
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_random = seed != 0 ? new System.Random(seed) : null;
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long space = 1;
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for (int i = 0; i < 4; i++)
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{
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space *= wordSet.Count;
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}
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_nameSpace = (int)System.Math.Min(space, int.MaxValue);
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}
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protected override void BuildNewName(StringBuilder nameBuilder, string originalName, string lastName)
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{
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nameBuilder.Append(_namePrefix);
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for (int i = _random != null ? _random.Next(_nameSpace) : _nextIndex++; ;)
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{
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nameBuilder.Append(_wordSet[i % _wordSet.Count]);
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i = i / _wordSet.Count;
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if (i == 0)
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{
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break;
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}
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}
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// keep generic type name pattern {name}`{n}, if not, il2cpp may raise exception in typeof(G<T>) when G contains a field likes `T a`.
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int index = originalName.LastIndexOf('`');
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if (index != -1)
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{
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nameBuilder.Append(originalName.Substring(index));
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}
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}
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}
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}
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