101 lines
3.5 KiB
C#
101 lines
3.5 KiB
C#
/*
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Copyright 2020 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
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All rights reserved.
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*/
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using System;
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namespace Il2CppInspector.Cpp
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{
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// A field in a C++ type
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public class CppField
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{
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// The name of the field
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public string Name { get; }
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// The type of the field
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public CppType Type { get; }
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// Whether the field is const
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public bool IsConst { get; }
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// The offset of the field into the type
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public int Offset { get; internal set; }
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// The size of the field in bits
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public int BitfieldSize { get; }
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// The offset of the field into the type in bytes
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public int OffsetBytes => Offset / 8;
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// The size of the field
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public int Size => (BitfieldSize > 0 ? BitfieldSize : Type.Size);
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public int SizeBytes => (Size / 8) + (Size % 8 > 0 ? 1 : 0);
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// The LSB of the bitfield
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public int BitfieldLSB => Offset % 8;
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// The MSB of the bitfield
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public int BitfieldMSB => BitfieldLSB + Size - 1;
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// Initialize field
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public CppField(string name, CppType type, int bitfieldSize = 0, bool isConst = false) {
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Name = name;
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Type = type;
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BitfieldSize = bitfieldSize;
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IsConst = isConst;
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}
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// C++ representation of field
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public virtual string ToString(string format = "") {
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var offset = format == "o" ? $"/* 0x{OffsetBytes:x2} - 0x{OffsetBytes + SizeBytes - 1:x2} (0x{SizeBytes:x2}) */ " : "";
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var prefix = (IsConst ? "const " : "");
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var field = Type switch {
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// nested anonymous types (trim semi-colon and newline from end)
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CppComplexType t when string.IsNullOrEmpty(t.Name) => (format == "o"? "\n" : "")
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+ t.ToString(format)[..^2] + (Name.Length > 0? " " + Name : ""),
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// function pointers
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CppFnPtrType t when string.IsNullOrEmpty(t.Name) => t.ToFieldString(Name, format),
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// regular fields
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_ => $"{Type.ToFieldString(Name, format)}" + (BitfieldSize > 0? $" : {BitfieldSize}" : "")
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};
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var suffix = "";
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// bitfields
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if (BitfieldSize > 0 && format == "o")
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suffix += $" /* bits {BitfieldLSB} - {BitfieldMSB} */";
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return offset + prefix + field + suffix;
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}
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public override string ToString() => ToString();
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}
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// An enum key and value pair
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public class CppEnumField : CppField
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{
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// The value of this key name
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public object Value { get; }
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public CppEnumField(string name, CppType type, object value) : base(name, type) => Value = value;
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// We output as hex to avoid unsigned value compiler errors for top bit set values in VS <= 2017
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// We'll get compiler warnings instead but it will still compile
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public override string ToString(string format = "") {
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var signed = Type.Name.StartsWith("int"); // int8/16/32/64_t or uint8/16/32/64_t/bool/float/double
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// Signed number with top bit set (only perform cast if underlying type is signed)
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var fieldIsNegative = signed && ((long) Convert.ChangeType(Value, typeof(long))) < 0;
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if (fieldIsNegative)
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return $"{Name} = {Value}";
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return string.Format("{0} = 0x{1:x" + Type.SizeBytes * 2 + "}", Name, Value);
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}
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}
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}
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