mirror of
https://github.com/fadden/6502bench.git
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a23c7e5ab6
These *almost* match what cc65 has, and are accepted as primary or aliases by 64tass. This combines the LAX and LXA operations. LXA is the immediate form of LAX, and behaves somewhat differently (and is unstable). I was treating them as two separate operations with independent mnemonics, but that doesn't seem to be the preferred way to handle it. The cc65 generator wasn't generating LAX before; now it does. This required nudging the width disambiguator, as LAX is a second example of an instruction with both DP,Y and ABS,Y operands. (issue #20)
649 lines
27 KiB
C#
649 lines
27 KiB
C#
/*
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* Copyright 2018 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.IO;
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using System.Text;
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using Asm65;
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using CommonUtil;
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namespace SourceGen.AsmGen {
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/// <summary>
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/// Generate source code compatible with the cc65 assembler (https://github.com/cc65/cc65).
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/// </summary>
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public class GenCc65 : IGenerator {
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private const string ASM_FILE_SUFFIX = "_cc65.S";
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private const int MAX_OPERAND_LEN = 64;
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// IGenerator
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public DisasmProject Project { get; private set; }
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// IGenerator
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public Formatter SourceFormatter { get; private set; }
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// IGenerator
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public AppSettings Settings { get; private set; }
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// IGenerator
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public AssemblerQuirks Quirks { get; private set; }
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// IGenerator
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public LabelLocalizer Localizer { get { return mLocalizer; } }
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/// <summary>
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/// Working directory, i.e. where we write our output file(s).
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/// </summary>
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private string mWorkDirectory;
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/// <summary>
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/// If set, long labels get their own line.
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/// </summary>
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private bool mLongLabelNewLine;
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/// <summary>
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/// Base filename. Typically the project file name without the ".dis65" extension.
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/// </summary>
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private string mFileNameBase;
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/// <summary>
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/// StringBuilder to use when composing a line. Held here to reduce allocations.
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/// </summary>
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private StringBuilder mLineBuilder = new StringBuilder(100);
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/// <summary>
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/// Label localization helper.
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/// </summary>
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private LabelLocalizer mLocalizer;
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/// <summary>
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/// Stream to send the output to.
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/// </summary>
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private StreamWriter mOutStream;
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/// <summary>
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/// The first time we output a high-ASCII string, we generate a macro for it.
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/// </summary>
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private bool mHighAsciiMacroOutput;
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/// <summary>
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/// Holds detected version of configured assembler.
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/// </summary>
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private CommonUtil.Version mAsmVersion = CommonUtil.Version.NO_VERSION;
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// We test against this in a few places.
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private static CommonUtil.Version V2_17 = new CommonUtil.Version(2, 17);
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// Pseudo-op string constants.
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private static PseudoOp.PseudoOpNames sDataOpNames = new PseudoOp.PseudoOpNames() {
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EquDirective = "=",
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OrgDirective = ".org",
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//RegWidthDirective // .a8, .a16, .i8, .i16
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DefineData1 = ".byte",
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DefineData2 = ".word",
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DefineData3 = ".faraddr",
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DefineData4 = ".dword",
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DefineBigData2 = ".dbyt",
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//DefineBigData3
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//DefineBigData4
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Fill = ".res",
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//Dense // no equivalent, use .byte with comma-separated args
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StrGeneric = ".byte",
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//StrReverse
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StrNullTerm = ".asciiz",
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//StrLen8 // macro with .strlen?
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//StrLen16
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//StrDci
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//StrDciReverse
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};
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// IGenerator
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public void Configure(DisasmProject project, string workDirectory, string fileNameBase,
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AssemblerVersion asmVersion, AppSettings settings) {
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Debug.Assert(project != null);
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Debug.Assert(!string.IsNullOrEmpty(workDirectory));
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Debug.Assert(!string.IsNullOrEmpty(fileNameBase));
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Project = project;
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Quirks = new AssemblerQuirks();
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if (asmVersion != null) {
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// Use the actual version. If it's > 2.17 we'll try to take advantage of
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// bug fixes.
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mAsmVersion = asmVersion.Version;
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} else {
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// No assembler installed. Use 2.17.
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mAsmVersion = V2_17;
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}
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if (mAsmVersion <= V2_17) {
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// cc65 v2.17: https://github.com/cc65/cc65/issues/717
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Quirks.BlockMoveArgsReversed = true;
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// cc65 v2.17: https://github.com/cc65/cc65/issues/754
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Quirks.NoPcRelBankWrap = true;
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}
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mWorkDirectory = workDirectory;
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mFileNameBase = fileNameBase;
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Settings = settings;
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mLongLabelNewLine = Settings.GetBool(AppSettings.SRCGEN_LONG_LABEL_NEW_LINE, false);
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}
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// IGenerator
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public List<string> GenerateSource(BackgroundWorker worker) {
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List<string> pathNames = new List<string>(1);
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string fileName = mFileNameBase + ASM_FILE_SUFFIX;
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string pathName = Path.Combine(mWorkDirectory, fileName);
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pathNames.Add(pathName);
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Formatter.FormatConfig config = new Formatter.FormatConfig();
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GenCommon.ConfigureFormatterFromSettings(Settings, ref config);
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config.mForceAbsOpcodeSuffix = string.Empty;
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config.mForceLongOpcodeSuffix = string.Empty;
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config.mForceAbsOperandPrefix = "a:"; // absolute
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config.mForceLongOperandPrefix = "f:"; // far
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config.mEndOfLineCommentDelimiter = ";";
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config.mFullLineCommentDelimiterBase = ";";
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config.mBoxLineCommentDelimiter = ";";
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config.mAllowHighAsciiCharConst = false;
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config.mExpressionMode = Formatter.FormatConfig.ExpressionMode.Simple;
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SourceFormatter = new Formatter(config);
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string msg = string.Format(Properties.Resources.PROGRESS_GENERATING_FMT, pathName);
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worker.ReportProgress(0, msg);
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mLocalizer = new LabelLocalizer(Project);
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if (!Settings.GetBool(AppSettings.SRCGEN_DISABLE_LABEL_LOCALIZATION, false)) {
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mLocalizer.LocalPrefix = "@";
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mLocalizer.Analyze();
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}
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// Use UTF-8 encoding, without a byte-order mark.
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using (StreamWriter sw = new StreamWriter(pathName, false, new UTF8Encoding(false))) {
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mOutStream = sw;
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if (Settings.GetBool(AppSettings.SRCGEN_ADD_IDENT_COMMENT, false)) {
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//if (mAsmVersion.IsValid && mAsmVersion <= V2_17) {
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// OutputLine(SourceFormatter.FullLineCommentDelimiter +
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// string.Format(Properties.Resources.GENERATED_FOR_VERSION,
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// "cc65", mAsmVersion.ToString()));
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//} else {
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// OutputLine(SourceFormatter.FullLineCommentDelimiter +
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// string.Format(Properties.Resources.GENERATED_FOR_LATEST, "cc65"));
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//}
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// Currently generating code for v2.17.
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OutputLine(SourceFormatter.FullLineCommentDelimiter +
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string.Format(Properties.Resources.GENERATED_FOR_VERSION,
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"cc65", V2_17));
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}
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GenCommon.Generate(this, sw, worker);
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}
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mOutStream = null;
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return pathNames;
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}
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// IGenerator
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public void OutputAsmConfig() {
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CpuDef cpuDef = Project.CpuDef;
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string cpuStr;
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if (cpuDef.Type == CpuDef.CpuType.Cpu65816) {
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cpuStr = "65816";
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} else if (cpuDef.Type == CpuDef.CpuType.Cpu65C02) {
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cpuStr = "65C02";
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} else if (cpuDef.Type == CpuDef.CpuType.Cpu6502 && cpuDef.HasUndocumented) {
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cpuStr = "6502X";
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} else {
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cpuStr = "6502";
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}
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OutputLine(string.Empty, SourceFormatter.FormatPseudoOp(".setcpu"),
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'\"' + cpuStr + '\"', string.Empty);
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}
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/// <summary>
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/// Map the mnemonics we chose for undocumented opcodes to the cc65 mnemonics.
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/// After switching to the Unintended Opcodes mnemonics there's almost no difference.
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///
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/// We don't include the double- and triple-byte NOPs here, as cc65 doesn't
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/// appear to have a definition for them (as of 2.17).
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/// </summary>
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private static Dictionary<string, string> sUndocMap = new Dictionary<string, string>() {
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{ OpName.ALR, "alr" }, // imm 0x4b
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{ OpName.ANC, "anc" }, // imm 0x0b (and others)
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{ OpName.ANE, "ane" }, // imm 0x8b
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{ OpName.ARR, "arr" }, // imm 0x6b
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{ OpName.DCP, "dcp" }, // abs 0xcf
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{ OpName.ISC, "isc" }, // abs 0xef
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{ OpName.JAM, "jam" }, // abs 0x02 (and others)
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{ OpName.LAS, "las" }, // abs,y 0xbb
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{ OpName.LAX, "lax" }, // imm 0xab; abs 0xaf
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{ OpName.RLA, "rla" }, // abs 0x2f
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{ OpName.RRA, "rra" }, // abs 0x6f
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{ OpName.SAX, "sax" }, // abs 0x8f
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{ OpName.SBX, "axs" }, //* imm 0xcb
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{ OpName.SHA, "sha" }, // abs,y 0x9f
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{ OpName.SHX, "shx" }, // abs,y 0x9e
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{ OpName.SHY, "shy" }, // abs,x 0x9c
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{ OpName.SLO, "slo" }, // abs 0x0f
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{ OpName.SRE, "sre" }, // abs 0x4f
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{ OpName.TAS, "tas" }, // abs,y 0x9b
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};
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// IGenerator
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public string ReplaceMnemonic(OpDef op) {
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if ((op == OpDef.OpWDM_WDM || op == OpDef.OpBRK_StackInt) && mAsmVersion <= V2_17) {
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// cc65 v2.17 doesn't support WDM, and assembles BRK <arg> to opcode $05.
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// https://github.com/cc65/cc65/issues/715
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// https://github.com/cc65/cc65/issues/716
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return null;
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} else if (op.IsUndocumented) {
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if (sUndocMap.TryGetValue(op.Mnemonic, out string newValue)) {
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if ((op.Mnemonic == OpName.ANC && op.Opcode != 0x0b) ||
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(op.Mnemonic == OpName.JAM && op.Opcode != 0x02)) {
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// There are multiple opcodes for the same thing. cc65 outputs
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// one specific thing, so we need to match that, and just do a hex
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// dump for the others.
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return null;
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}
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return newValue;
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}
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return null;
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} else {
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return string.Empty;
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}
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}
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// IGenerator
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public void GenerateShortSequence(int offset, int length, out string opcode,
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out string operand) {
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Debug.Assert(length >= 1 && length <= 4);
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// Use a comma-separated list of individual hex bytes.
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opcode = sDataOpNames.DefineData1;
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StringBuilder sb = new StringBuilder(length * 4);
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for (int i = 0; i < length; i++) {
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if (i != 0) {
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sb.Append(',');
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}
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sb.Append(SourceFormatter.FormatHexValue(Project.FileData[offset + i], 2));
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}
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operand = sb.ToString();
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}
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// IGenerator
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public void OutputDataOp(int offset) {
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Formatter formatter = SourceFormatter;
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byte[] data = Project.FileData;
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Anattrib attr = Project.GetAnattrib(offset);
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string labelStr = string.Empty;
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if (attr.Symbol != null) {
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labelStr = mLocalizer.ConvLabel(attr.Symbol.Label);
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}
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string commentStr = SourceFormatter.FormatEolComment(Project.Comments[offset]);
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string opcodeStr, operandStr;
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FormatDescriptor dfd = attr.DataDescriptor;
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Debug.Assert(dfd != null);
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int length = dfd.Length;
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Debug.Assert(length > 0);
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bool multiLine = false;
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switch (dfd.FormatType) {
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case FormatDescriptor.Type.Default:
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if (length != 1) {
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Debug.Assert(false);
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length = 1;
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}
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opcodeStr = sDataOpNames.DefineData1;
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int operand = RawData.GetWord(data, offset, length, false);
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operandStr = formatter.FormatHexValue(operand, length * 2);
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break;
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case FormatDescriptor.Type.NumericLE:
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opcodeStr = sDataOpNames.GetDefineData(length);
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operand = RawData.GetWord(data, offset, length, false);
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operandStr = PseudoOp.FormatNumericOperand(formatter, Project.SymbolTable,
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mLocalizer.LabelMap, dfd, operand, length, false);
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break;
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case FormatDescriptor.Type.NumericBE:
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opcodeStr = sDataOpNames.GetDefineBigData(length);
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if (opcodeStr == null) {
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// Nothing defined, output as comma-separated single-byte values.
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GenerateShortSequence(offset, length, out opcodeStr, out operandStr);
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} else {
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operand = RawData.GetWord(data, offset, length, true);
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operandStr = PseudoOp.FormatNumericOperand(formatter, Project.SymbolTable,
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mLocalizer.LabelMap, dfd, operand, length, false);
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}
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break;
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case FormatDescriptor.Type.Fill:
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opcodeStr = sDataOpNames.Fill;
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operandStr = length + "," + formatter.FormatHexValue(data[offset], 2);
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break;
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case FormatDescriptor.Type.Dense:
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multiLine = true;
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opcodeStr = operandStr = null;
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OutputDenseHex(offset, length, labelStr, commentStr);
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break;
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case FormatDescriptor.Type.String:
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multiLine = true;
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opcodeStr = operandStr = null;
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OutputString(offset, labelStr, commentStr);
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break;
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default:
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opcodeStr = "???";
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operandStr = "***";
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break;
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}
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if (!multiLine) {
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opcodeStr = formatter.FormatPseudoOp(opcodeStr);
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OutputLine(labelStr, opcodeStr, operandStr, commentStr);
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}
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}
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private void OutputDenseHex(int offset, int length, string labelStr, string commentStr) {
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Formatter formatter = SourceFormatter;
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byte[] data = Project.FileData;
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StringBuilder sb = new StringBuilder(MAX_OPERAND_LEN);
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string opcodeStr = formatter.FormatPseudoOp(sDataOpNames.DefineData1);
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int maxPerLine = MAX_OPERAND_LEN / 4;
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int numChunks = (length + maxPerLine - 1) / maxPerLine;
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for (int chunk = 0; chunk < numChunks; chunk++) {
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int chunkStart = chunk * maxPerLine;
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int chunkEnd = Math.Min((chunk + 1) * maxPerLine, length);
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for (int i = chunkStart; i < chunkEnd; i++) {
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if (i != chunkStart) {
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sb.Append(',');
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}
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sb.Append(formatter.FormatHexValue(data[offset + i], 2));
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}
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OutputLine(labelStr, opcodeStr, sb.ToString(), commentStr);
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labelStr = commentStr = string.Empty;
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sb.Clear();
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}
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}
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/// <summary>
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/// Outputs formatted data in an unformatted way, because the code generator couldn't
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/// figure out how to do something better.
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/// </summary>
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private void OutputNoJoy(int offset, int length, string labelStr, string commentStr) {
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byte[] data = Project.FileData;
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Debug.Assert(length > 0);
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Debug.Assert(offset >= 0 && offset < data.Length);
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bool singleValue = true;
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byte val = data[offset];
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for (int i = 1; i < length; i++) {
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if (data[offset + i] != val) {
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singleValue = false;
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break;
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}
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}
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if (singleValue) {
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string opcodeStr = SourceFormatter.FormatPseudoOp(sDataOpNames.Fill);
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string operandStr = length + "," + SourceFormatter.FormatHexValue(val, 2);
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OutputLine(labelStr, opcodeStr, operandStr, commentStr);
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} else {
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OutputDenseHex(offset, length, labelStr, commentStr);
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}
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}
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// IGenerator
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public void OutputEquDirective(string name, string valueStr, string comment) {
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OutputLine(name, SourceFormatter.FormatPseudoOp(sDataOpNames.EquDirective),
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valueStr, SourceFormatter.FormatEolComment(comment));
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}
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// IGenerator
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public void OutputOrgDirective(int address) {
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OutputLine(string.Empty, SourceFormatter.FormatPseudoOp(sDataOpNames.OrgDirective),
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SourceFormatter.FormatHexValue(address, 4), string.Empty);
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}
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// IGenerator
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public void OutputRegWidthDirective(int offset, int prevM, int prevX, int newM, int newX) {
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if (prevM != newM) {
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string mop = (newM == 0) ? ".a16" : ".a8";
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OutputLine(string.Empty, SourceFormatter.FormatPseudoOp(mop),
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string.Empty, string.Empty);
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}
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if (prevX != newX) {
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string xop = (newX == 0) ? ".i16" : ".i8";
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OutputLine(string.Empty, SourceFormatter.FormatPseudoOp(xop),
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string.Empty, string.Empty);
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}
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}
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// IGenerator
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public void OutputLine(string fullLine) {
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mOutStream.WriteLine(fullLine);
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}
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// IGenerator
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public void OutputLine(string label, string opcode, string operand, string comment) {
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// If a label is provided, and it doesn't start with a '.' (indicating that it's
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// a directive), and this isn't an EQU directive, add a ':'. Might be easier to
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// just ".feature labels_without_colons", but I'm trying to do things the way
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// that cc65 users will expect.
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if (!string.IsNullOrEmpty(label) && label[0] != '.' &&
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!String.Equals(opcode, sDataOpNames.EquDirective,
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StringComparison.InvariantCultureIgnoreCase)) {
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label += ':';
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if (mLongLabelNewLine && label.Length >= 9) {
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mOutStream.WriteLine(label);
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label = string.Empty;
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}
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}
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mLineBuilder.Clear();
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TextUtil.AppendPaddedString(mLineBuilder, label, 9);
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TextUtil.AppendPaddedString(mLineBuilder, opcode, 9 + 8);
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TextUtil.AppendPaddedString(mLineBuilder, operand, 9 + 8 + 11);
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if (string.IsNullOrEmpty(comment)) {
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// Trim trailing spaces off of opcode or operand. If they want trailing
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// spaces at the end of a comment, that's fine.
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CommonUtil.TextUtil.TrimEnd(mLineBuilder);
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} else {
|
|
mLineBuilder.Append(comment);
|
|
}
|
|
|
|
mOutStream.WriteLine(mLineBuilder.ToString());
|
|
}
|
|
|
|
private void OutputString(int offset, string labelStr, string commentStr) {
|
|
// Normal ASCII strings are straightforward: they're just part of a .byte
|
|
// directive, and can mix with anything else in the .byte.
|
|
//
|
|
// For CString we can use .asciiz, but only if the string fits on one line
|
|
// and doesn't include delimiters. For L8String and L16String we can
|
|
// define simple macros, but their use has a similar restriction. High-ASCII
|
|
// strings also require a macro.
|
|
//
|
|
// We might be able to define a macro for DCI and Reverse as well.
|
|
//
|
|
// The limitation on strings with delimiters arises because (1) I don't see a
|
|
// way to escape them within a string, and (2) the simple macro workarounds
|
|
// only take a single argument, not a comma-separated list of stuff.
|
|
//
|
|
// Some ideas here:
|
|
// https://groups.google.com/forum/#!topic/comp.sys.apple2.programmer/5Wkw8mUPcU0
|
|
|
|
Formatter formatter = SourceFormatter;
|
|
byte[] data = Project.FileData;
|
|
Anattrib attr = Project.GetAnattrib(offset);
|
|
FormatDescriptor dfd = attr.DataDescriptor;
|
|
Debug.Assert(dfd != null);
|
|
Debug.Assert(dfd.FormatType == FormatDescriptor.Type.String);
|
|
Debug.Assert(dfd.Length > 0);
|
|
|
|
bool highAscii = false;
|
|
int leadingBytes = 0;
|
|
int trailingBytes = 0;
|
|
bool showLeading = false;
|
|
bool showTrailing = false;
|
|
|
|
switch (dfd.FormatSubType) {
|
|
case FormatDescriptor.SubType.None:
|
|
highAscii = (data[offset] & 0x80) != 0;
|
|
break;
|
|
case FormatDescriptor.SubType.Dci:
|
|
highAscii = (data[offset] & 0x80) != 0;
|
|
trailingBytes = 1;
|
|
showTrailing = true;
|
|
break;
|
|
case FormatDescriptor.SubType.Reverse:
|
|
highAscii = (data[offset] & 0x80) != 0;
|
|
break;
|
|
case FormatDescriptor.SubType.DciReverse:
|
|
highAscii = (data[offset + dfd.Length - 1] & 0x80) != 0;
|
|
leadingBytes = 1;
|
|
showLeading = true;
|
|
break;
|
|
case FormatDescriptor.SubType.CString:
|
|
highAscii = (data[offset] & 0x80) != 0;
|
|
trailingBytes = 1;
|
|
showTrailing = true;
|
|
break;
|
|
case FormatDescriptor.SubType.L8String:
|
|
if (dfd.Length > 1) {
|
|
highAscii = (data[offset + 1] & 0x80) != 0;
|
|
}
|
|
leadingBytes = 1;
|
|
showLeading = true;
|
|
break;
|
|
case FormatDescriptor.SubType.L16String:
|
|
if (dfd.Length > 2) {
|
|
highAscii = (data[offset + 2] & 0x80) != 0;
|
|
}
|
|
leadingBytes = 2;
|
|
showLeading = true;
|
|
break;
|
|
default:
|
|
Debug.Assert(false);
|
|
return;
|
|
}
|
|
|
|
char delim = '"';
|
|
StringGather gath = null;
|
|
|
|
// Run the string through so we can see if it'll fit on one line. As a minor
|
|
// optimization, we skip this step for "generic" strings, which are probably
|
|
// the most common thing.
|
|
if (dfd.FormatSubType != FormatDescriptor.SubType.None || highAscii) {
|
|
gath = new StringGather(this, labelStr, "???", commentStr, delim,
|
|
delim, StringGather.ByteStyle.CommaSep, MAX_OPERAND_LEN, true);
|
|
FeedGath(gath, data, offset, dfd.Length, leadingBytes, showLeading,
|
|
trailingBytes, showTrailing);
|
|
Debug.Assert(gath.NumLinesOutput > 0);
|
|
}
|
|
|
|
string opcodeStr = formatter.FormatPseudoOp(sDataOpNames.StrGeneric);
|
|
|
|
switch (dfd.FormatSubType) {
|
|
case FormatDescriptor.SubType.None:
|
|
// Special case for simple short high-ASCII strings. These have no
|
|
// leading or trailing bytes. We can improve this a bit by handling
|
|
// arbitrarily long strings by simply breaking them across lines.
|
|
Debug.Assert(leadingBytes == 0);
|
|
Debug.Assert(trailingBytes == 0);
|
|
if (highAscii && gath.NumLinesOutput == 1 && !gath.HasDelimiter) {
|
|
if (!mHighAsciiMacroOutput) {
|
|
mHighAsciiMacroOutput = true;
|
|
// Output a macro for high-ASCII strings.
|
|
OutputLine(".macro", "HiAscii", "Arg", string.Empty);
|
|
OutputLine(string.Empty, ".repeat", ".strlen(Arg), I", string.Empty);
|
|
OutputLine(string.Empty, ".byte", ".strat(Arg, I) | $80", string.Empty);
|
|
OutputLine(string.Empty, ".endrep", string.Empty, string.Empty);
|
|
OutputLine(".endmacro", string.Empty, string.Empty, string.Empty);
|
|
}
|
|
opcodeStr = formatter.FormatPseudoOp("HiAscii");
|
|
highAscii = false;
|
|
}
|
|
break;
|
|
case FormatDescriptor.SubType.Dci:
|
|
case FormatDescriptor.SubType.Reverse:
|
|
case FormatDescriptor.SubType.DciReverse:
|
|
// Full configured above.
|
|
break;
|
|
case FormatDescriptor.SubType.CString:
|
|
if (gath.NumLinesOutput == 1 && !gath.HasDelimiter) {
|
|
opcodeStr = sDataOpNames.StrNullTerm;
|
|
showTrailing = false;
|
|
}
|
|
break;
|
|
case FormatDescriptor.SubType.L8String:
|
|
case FormatDescriptor.SubType.L16String:
|
|
// Implement macros?
|
|
break;
|
|
default:
|
|
Debug.Assert(false);
|
|
return;
|
|
}
|
|
|
|
if (highAscii) {
|
|
OutputNoJoy(offset, dfd.Length, labelStr, commentStr);
|
|
return;
|
|
}
|
|
|
|
// Create a new StringGather, with the final opcode choice.
|
|
gath = new StringGather(this, labelStr, opcodeStr, commentStr, delim,
|
|
delim, StringGather.ByteStyle.CommaSep, MAX_OPERAND_LEN, false);
|
|
FeedGath(gath, data, offset, dfd.Length, leadingBytes, showLeading,
|
|
trailingBytes, showTrailing);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Feeds the bytes into the StringGather.
|
|
/// </summary>
|
|
private void FeedGath(StringGather gath, byte[] data, int offset, int length,
|
|
int leadingBytes, bool showLeading, int trailingBytes, bool showTrailing) {
|
|
int startOffset = offset;
|
|
int strEndOffset = offset + length - trailingBytes;
|
|
|
|
if (showLeading) {
|
|
while (leadingBytes-- > 0) {
|
|
gath.WriteByte(data[offset++]);
|
|
}
|
|
} else {
|
|
offset += leadingBytes;
|
|
}
|
|
for (; offset < strEndOffset; offset++) {
|
|
gath.WriteChar((char)(data[offset] & 0x7f));
|
|
}
|
|
while (showTrailing && trailingBytes-- > 0) {
|
|
gath.WriteByte(data[offset++]);
|
|
}
|
|
gath.Finish();
|
|
}
|
|
}
|
|
}
|