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using Mono.Cecil;
using Mono.Cecil.Cil;
namespace StardewModdingAPI.AssemblyRewriters.Framework
{
/// <summary>Base class for a field rewriter.</summary>
public abstract class BaseFieldRewriter : IInstructionRewriter
{
/*********
** Public methods
*********/
/// <summary>Get whether a CIL instruction should be rewritten.</summary>
/// <param name="instruction">The IL instruction.</param>
/// <param name="platformChanged">Whether the mod was compiled on a different platform.</param>
public bool ShouldRewrite(Instruction instruction, bool platformChanged)
{
if (instruction.OpCode != OpCodes.Ldfld && instruction.OpCode != OpCodes.Ldsfld && instruction.OpCode != OpCodes.Stfld && instruction.OpCode != OpCodes.Stsfld)
return false; // not a field reference
return this.ShouldRewrite(instruction, (FieldReference)instruction.Operand, platformChanged);
}
/// <summary>Rewrite a CIL instruction for compatibility.</summary>
/// <param name="module">The module being rewritten.</param>
/// <param name="cil">The CIL rewriter.</param>
/// <param name="instruction">The instruction to rewrite.</param>
/// <param name="assemblyMap">Metadata for mapping assemblies to the current platform.</param>
public void Rewrite(ModuleDefinition module, ILProcessor cil, Instruction instruction, PlatformAssemblyMap assemblyMap)
{
FieldReference fieldRef = (FieldReference)instruction.Operand;
this.Rewrite(module, cil, instruction, fieldRef, assemblyMap);
}
/*********
** Protected methods
*********/
/// <summary>Get whether a field reference should be rewritten.</summary>
/// <param name="instruction">The IL instruction.</param>
/// <param name="fieldRef">The field reference.</param>
/// <param name="platformChanged">Whether the mod was compiled on a different platform.</param>
protected abstract bool ShouldRewrite(Instruction instruction, FieldReference fieldRef, bool platformChanged);
/// <summary>Rewrite a method for compatibility.</summary>
/// <param name="module">The module being rewritten.</param>
/// <param name="cil">The CIL rewriter.</param>
/// <param name="instruction">The instruction which references the field.</param>
/// <param name="fieldRef">The field reference invoked by the <paramref name="instruction"/>.</param>
/// <param name="assemblyMap">Metadata for mapping assemblies to the current platform.</param>
protected abstract void Rewrite(ModuleDefinition module, ILProcessor cil, Instruction instruction, FieldReference fieldRef, PlatformAssemblyMap assemblyMap);
}
}
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