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992e008e7d
It's useful to have an example of an extension script that handles multiple types of things. It's also good to show that scripts can handle data types other than strings, and can chase an address to format data items elsewhere in the code. This required updating the tutorial binary, adding the new script, and updating the tutorial text and associated screen shots.
82 lines
2.9 KiB
C#
82 lines
2.9 KiB
C#
// Copyright 2019 faddenSoft. All Rights Reserved.
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// See the LICENSE.txt file for distribution terms (Apache 2.0).
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using System;
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using System.Collections.Generic;
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using PluginCommon;
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namespace ExtensionScriptSample {
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/// <summary>
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/// Sample class for handling a JSR followed by an inline null-terminated string. Any
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/// label that starts with "PrintLineNullString" is matched.
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/// </summary>
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public class InlineNullTermString : MarshalByRefObject, IPlugin, IPlugin_SymbolList,
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IPlugin_InlineJsr {
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private IApplication mAppRef;
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private byte[] mFileData;
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private const string LABEL_PREFIX = "PrintInlineNullString";
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private Dictionary<int, PlSymbol> mNullStringAddrs = new Dictionary<int, PlSymbol>();
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public string Identifier {
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get {
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return "Inline null-terminated ASCII string handler";
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}
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}
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public void Prepare(IApplication appRef, byte[] fileData, AddressTranslate addrTrans) {
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mAppRef = appRef;
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mFileData = fileData;
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mAppRef.DebugLog("InlineNullStringHandler(id=" +
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AppDomain.CurrentDomain.Id + "): prepare()");
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}
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public void Unprepare() {
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mAppRef = null;
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mFileData = null;
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}
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public void UpdateSymbolList(List<PlSymbol> plSyms) {
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mNullStringAddrs.Clear();
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// Find matching symbols.
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foreach (PlSymbol sym in plSyms) {
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if (sym.Label.StartsWith(LABEL_PREFIX)) {
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mNullStringAddrs.Add(sym.Value, sym);
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}
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}
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mAppRef.DebugLog(LABEL_PREFIX + " matched " + mNullStringAddrs.Count + " labels");
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}
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public bool IsLabelSignificant(string beforeLabel, string afterLabel) {
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return beforeLabel.StartsWith(LABEL_PREFIX) || afterLabel.StartsWith(LABEL_PREFIX);
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}
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public void CheckJsr(int offset, int operand, out bool noContinue) {
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noContinue = false;
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if (!mNullStringAddrs.ContainsKey(operand)) {
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return;
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}
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// search for the terminating null byte
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int nullOff = offset + 3;
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while (nullOff < mFileData.Length) {
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if (mFileData[nullOff] == 0x00) {
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break;
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}
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nullOff++;
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}
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if (nullOff == mFileData.Length) {
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mAppRef.DebugLog("Unable to find end of null-terminated string at +" +
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(offset+3).ToString("x6"));
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return;
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}
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// Assuming ASCII. This can be hard-coded, use auto-detection, or look
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// up a value in a project constant.
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mAppRef.SetInlineDataFormat(offset + 3, nullOff - (offset + 3) + 1,
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DataType.StringNullTerm, DataSubType.Ascii, null);
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}
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}
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}
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