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6502bench/SourceGen/Examples/Scripts/InlineL1String.cs

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// Copyright 2019 faddenSoft. All Rights Reserved.
// See the LICENSE.txt file for distribution terms (Apache 2.0).
using System;
using System.Collections.Generic;
using PluginCommon;
namespace ExtensionScriptSample {
/// <summary>
/// Sample class for handling a JSR followed by a string prefixed with a 1-byte length.
/// </summary>
public class InlineL1String: MarshalByRefObject, IPlugin, IPlugin_SymbolList,
IPlugin_InlineJsr {
private IApplication mAppRef;
private byte[] mFileData;
// Only one call.
private const string CALL_LABEL = "PrintInlineL1String";
private int mInlineL1StringAddr; // jsr
public string Identifier {
get {
return "Inline L1 ASCII string handler";
}
}
public void Prepare(IApplication appRef, byte[] fileData, AddressTranslate addrTrans) {
mAppRef = appRef;
mFileData = fileData;
mAppRef.DebugLog("InlineL1String(id=" +
AppDomain.CurrentDomain.Id + "): prepare()");
}
public void UpdateSymbolList(List<PlSymbol> plSyms) {
// reset this every time, in case they remove the symbol
mInlineL1StringAddr = -1;
foreach (PlSymbol sym in plSyms) {
if (sym.Label == CALL_LABEL) {
mInlineL1StringAddr = sym.Value;
break;
}
}
mAppRef.DebugLog(CALL_LABEL + " @ $" + mInlineL1StringAddr.ToString("x6"));
}
public bool IsLabelSignificant(string beforeLabel, string afterLabel) {
return beforeLabel == CALL_LABEL || afterLabel == CALL_LABEL;
}
public void CheckJsr(int offset, int operand, out bool noContinue) {
noContinue = false;
if (operand != mInlineL1StringAddr) {
return;
}
if (offset + 3 >= mFileData.Length) {
return; // length byte is off end
}
int len = mFileData[3]; // first byte past JSR
if (offset + 4 + len > mFileData.Length) {
mAppRef.DebugLog("L1 string ran off end of file at +" +
(offset + 4).ToString("x6"));
return;
}
// Assuming ASCII. This can be hard-coded, use auto-detection, or look
// up a value in a project constant.
mAppRef.SetInlineDataFormat(offset + 3, len + 1,
DataType.StringL8, DataSubType.Ascii, null);
}
}
}