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The scripts for tutorial #4 were suffering from bit rot. Did some word-smithing on the tutorials.
82 lines
2.8 KiB
C#
82 lines
2.8 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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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] == 0) {
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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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