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https://github.com/fadden/6502bench.git
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4b46b78e34
Copied the extension script tutorial files out of the Scripts directory and into the Tutorial directory. This makes more sense, and makes it possible to expand the script sample without altering the tutorial. Reverted the Scripts sample to be an actual sample, rather than a tutorial. Renumbered the last two tutorials and added them to the ToC. This gives them actual numbers rather than treating them as add-ons to the advanced tutorial. Moved the source files for the tutorial binaries into a subdirectory to reduce clutter. This does mean we have two separate copies of the inline string sample plugins, but that's an artifact of our attempts at security.
77 lines
2.7 KiB
C#
77 lines
2.7 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 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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