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using Mono.Cecil;
using Mono.Cecil.Cil;
using StardewModdingAPI.Framework.ModLoading.Framework;
namespace StardewModdingAPI.Framework.ModLoading.Finders
{
/// <summary>Finds incompatible CIL instructions that reference a given method.</summary>
internal class MethodFinder : BaseInstructionHandler
{
/*********
** Fields
*********/
/// <summary>The full type name for which to find references.</summary>
private readonly string FullTypeName;
/// <summary>The method name for which to find references.</summary>
private readonly string MethodName;
/// <summary>The result to return for matching instructions.</summary>
private readonly InstructionHandleResult Result;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="fullTypeName">The full type name for which to find references.</param>
/// <param name="methodName">The method name for which to find references.</param>
/// <param name="result">The result to return for matching instructions.</param>
public MethodFinder(string fullTypeName, string methodName, InstructionHandleResult result)
: base(defaultPhrase: $"{fullTypeName}.{methodName} method")
{
this.FullTypeName = fullTypeName;
this.MethodName = methodName;
this.Result = result;
}
/// <inheritdoc />
public override bool Handle(ModuleDefinition module, ILProcessor cil, Instruction instruction)
{
if (!this.Flags.Contains(this.Result) && this.IsMatch(instruction))
this.MarkFlag(this.Result);
return false;
}
/*********
** Protected methods
*********/
/// <summary>Get whether a CIL instruction matches.</summary>
/// <param name="instruction">The IL instruction.</param>
protected bool IsMatch(Instruction instruction)
{
MethodReference? methodRef = RewriteHelper.AsMethodReference(instruction);
return
methodRef != null
&& methodRef.DeclaringType.FullName == this.FullTypeName
&& methodRef.Name == this.MethodName;
}
}
}
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