blob: 73844073cf3eb3ead62ccb514749504019fdd355 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
using System;
using System.Reflection;
using Mono.Cecil;
using Mono.Cecil.Cil;
using StardewModdingAPI.AssemblyRewriters.Finders;
namespace StardewModdingAPI.AssemblyRewriters.Rewriters
{
/// <summary>Rewrites references to one field with another.</summary>
public class FieldReplaceRewriter : FieldFinder
{
/*********
** Properties
*********/
/// <summary>The new field to reference.</summary>
private readonly FieldInfo ToField;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="type">The type whose field to which references should be rewritten.</param>
/// <param name="fromFieldName">The field name to rewrite.</param>
/// <param name="toFieldName">The new field name to reference.</param>
/// <param name="nounPhrase">A brief noun phrase indicating what the instruction finder matches (or <c>null</c> to generate one).</param>
public FieldReplaceRewriter(Type type, string fromFieldName, string toFieldName, string nounPhrase = null)
: base(type.FullName, fromFieldName, nounPhrase)
{
this.ToField = type.GetField(toFieldName);
if (this.ToField == null)
throw new InvalidOperationException($"The {type.FullName} class doesn't have a {toFieldName} field.");
}
/// <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>
/// <param name="platformChanged">Whether the mod was compiled on a different platform.</param>
/// <returns>Returns whether the instruction was rewritten.</returns>
/// <exception cref="IncompatibleInstructionException">The CIL instruction is not compatible, and can't be rewritten.</exception>
public override bool Rewrite(ModuleDefinition module, ILProcessor cil, Instruction instruction, PlatformAssemblyMap assemblyMap, bool platformChanged)
{
if (!this.IsMatch(instruction))
return false;
FieldReference newRef = module.Import(this.ToField);
cil.Replace(instruction, cil.Create(instruction.OpCode, newRef));
return true;
}
}
}
|
