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https://github.com/fadden/6502bench.git
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a88c746419
The cc65 assembler runs in a single pass, which means forward address references default to 16 bits. For zero-page references we have to add an explicit width disambiguator. (This is an unusual situation that only occurs if you have a zero-page .ORG in the file after code that references it.) With this change, 2014-label-dp passes, and no other regression tests were affected. (issue #40)
835 lines
35 KiB
C#
835 lines
35 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.Diagnostics;
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using System.Text;
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using AddressMode = Asm65.OpDef.AddressMode;
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namespace Asm65 {
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/// <summary>
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/// Functions used for formatting bits of 65xx code into human-readable form.
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///
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/// There are a variety of ways to format a given thing, based on personal preference
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/// (e.g. whether opcodes are upper- or lower-case) and assembler syntax requirements.
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///
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/// The functions in this class serve two purposes: (1) produce consistent output
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/// throughout the program; (2) cache format strings and other components to reduce
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/// string manipulation overhead. Note the caching is per-Formatter, so it's best to
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/// create just one and share it around.
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///
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/// The configuration of a Formatter may not be altered once created. This is important
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/// in situations where we compute output size in one pass and generate it in another,
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/// because it guarantees that a given Formatter object will produce the same number of
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/// lines of output.
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///
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/// NOTE: if the CpuDef changes, the cached values in the Formatter will become invalid.
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/// Discard the Formatter and create a new one. (This could be fixed by keying off of
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/// the OpDef instead of OpDef.Opcode, but that's less convenient.)
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/// </summary>
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public class Formatter {
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/// <summary>
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/// Various format configuration options. Fill one of these out and pass it to
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/// the Formatter constructor.
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/// </summary>
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public struct FormatConfig {
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// alpha case for some case-insensitive items
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public bool mUpperHexDigits; // display hex values in upper case?
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public bool mUpperOpcodes; // display opcodes in upper case?
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public bool mUpperPseudoOpcodes; // display pseudo-opcodes in upper case?
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public bool mUpperOperandA; // display acc operand in upper case?
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public bool mUpperOperandS; // display stack operand in upper case?
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public bool mUpperOperandXY; // display index register operand in upper case?
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public bool mBankSelectBackQuote; // use '`' rather than '^' for bank select?
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public bool mAddSpaceLongComment; // insert space after delimiter for long comments?
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// functional changes to assembly output
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public bool mSuppressHexNotation; // omit '$' before hex digits
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public bool mAllowHighAsciiCharConst; // can we do high-ASCII character constants?
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// (this might need to be generalized)
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public string mForceDirectOperandPrefix; // these may be null or empty
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public string mForceAbsOpcodeSuffix;
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public string mForceAbsOperandPrefix;
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public string mForceLongOpcodeSuffix;
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public string mForceLongOperandPrefix;
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public string mEndOfLineCommentDelimiter; // usually ';'
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public string mFullLineCommentDelimiterBase; // usually ';' or '*', WITHOUT extra space
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public string mBoxLineCommentDelimiter; // usually blank or ';'
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// miscellaneous
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public bool mHexDumpAsciiOnly; // disallow non-ASCII chars in hex dumps?
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public bool mSpacesBetweenBytes; // "20edfd" vs. "20 ed fd"
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public enum CharConvMode { Unknown = 0, PlainAscii, HighLowAscii };
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public CharConvMode mHexDumpCharConvMode; // character conversion mode for dumps
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// Hopefully we don't need a separate mode for every assembler in existence.
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public enum ExpressionMode { Unknown = 0, Common, Cc65, Merlin };
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public ExpressionMode mExpressionMode; // symbol rendering mode
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// Deserialization helper.
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public static ExpressionMode ParseExpressionMode(string str) {
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ExpressionMode em = ExpressionMode.Common;
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if (!string.IsNullOrEmpty(str)) {
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if (Enum.TryParse<ExpressionMode>(str, out ExpressionMode pem)) {
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em = pem;
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}
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}
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return em;
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}
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}
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private static readonly char[] sHexCharsLower = {
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
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};
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private static readonly char[] sHexCharsUpper = {
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
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};
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/// <summary>
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/// Formatter configuration options. Fixed at construction time.
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/// </summary>
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private FormatConfig mFormatConfig;
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/// <summary>
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/// Get a copy of the format config.
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/// </summary>
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public FormatConfig Config { get { return mFormatConfig; } }
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// Bits and pieces.
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char mHexFmtChar;
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string mHexPrefix;
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char mAccChar;
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char mXregChar;
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char mYregChar;
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char mSregChar;
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// Format string for offsets.
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private string mOffset20Format;
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// Format strings for addresses.
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private string mAddrFormatNoBank;
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private string mAddrFormatWithBank;
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// Generated opcode strings. The index is the bitwise OR of the opcode value and
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// the disambiguation value. In most cases this just helps us avoid calling
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// ToUpper incessantly.
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private Dictionary<int, string> mOpcodeStrings = new Dictionary<int, string>();
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// Generated pseudo-opcode strings.
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private Dictionary<string, string> mPseudoOpStrings = new Dictionary<string, string>();
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// Generated format strings for operands. The index is the bitwise OR of the
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// address mode and the disambiguation value.
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private Dictionary<int, string> mOperandFormats = new Dictionary<int, string>();
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// Generated format strings for bytes.
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private const int MAX_BYTE_DUMP = 4;
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private string[] mByteDumpFormats = new string[MAX_BYTE_DUMP];
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// Generated format strings for hex values.
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private string[] mHexValueFormats = new string[4];
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private string mFullLineCommentDelimiterPlus;
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// Buffer to use when generating hex dump lines.
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private char[] mHexDumpBuffer;
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/// <summary>
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/// A 16-character array with 0-9a-f, for hex conversions. The letters will be
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/// upper or lower case, per the format config.
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/// </summary>
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public char[] HexDigits {
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get {
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return mFormatConfig.mUpperHexDigits ? sHexCharsUpper : sHexCharsLower;
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}
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}
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/// <summary>
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/// String to put between the operand and the end-of-line comment.
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/// </summary>
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public string EndOfLineCommentDelimiter {
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get { return mFormatConfig.mEndOfLineCommentDelimiter; }
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}
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/// <summary>
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/// String to put at the start of a line with a full-line comment.
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/// </summary>
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public string FullLineCommentDelimiter {
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get { return mFullLineCommentDelimiterPlus; }
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}
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/// <summary>
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/// String to put at the start of a line that has a box comment. This is usually
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/// blank, as it's only needed if the assembler doesn't recognize the box character
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/// as a comment.
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/// </summary>
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public string BoxLineCommentDelimiter {
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get { return mFormatConfig.mBoxLineCommentDelimiter; }
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}
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/// <summary>
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/// When formatting a symbol with an offset, if this flag is set, generate code that
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/// assumes the assembler applies the adjustment, then shifts the result. If not,
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/// assume the assembler shifts the operand before applying the adjustment.
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/// </summary>
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public FormatConfig.ExpressionMode ExpressionMode {
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get { return mFormatConfig.mExpressionMode; }
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}
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public Formatter(FormatConfig config) {
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mFormatConfig = config;
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if (mFormatConfig.mEndOfLineCommentDelimiter == null) {
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mFormatConfig.mEndOfLineCommentDelimiter = string.Empty;
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}
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if (mFormatConfig.mFullLineCommentDelimiterBase == null) {
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mFormatConfig.mFullLineCommentDelimiterBase = string.Empty;
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}
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if (mFormatConfig.mBoxLineCommentDelimiter == null) {
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mFormatConfig.mBoxLineCommentDelimiter = string.Empty;
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}
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if (mFormatConfig.mAddSpaceLongComment) {
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mFullLineCommentDelimiterPlus = mFormatConfig.mFullLineCommentDelimiterBase + " ";
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} else {
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mFullLineCommentDelimiterPlus = mFormatConfig.mFullLineCommentDelimiterBase;
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}
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Reset();
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// Prep the static parts of the hex dump buffer.
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mHexDumpBuffer = new char[73];
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for (int i = 0; i < mHexDumpBuffer.Length; i++) {
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mHexDumpBuffer[i] = ' ';
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}
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mHexDumpBuffer[6] = ':';
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}
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/// <summary>
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/// Resets the pieces we use to build format strings.
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/// </summary>
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private void Reset() {
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// Clear old data. (No longer needed.)
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//mAddrFormatNoBank = mAddrFormatWithBank = null;
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//mOffset20Format = null;
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//mOpcodeStrings.Clear();
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//mPseudoOpStrings.Clear();
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//mOperandFormats.Clear();
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//for (int i = 0; i < MAX_BYTE_DUMP; i++) {
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// mByteDumpFormats[i] = null;
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//}
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if (mFormatConfig.mUpperHexDigits) {
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mHexFmtChar = 'X';
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} else {
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mHexFmtChar = 'x';
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}
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if (mFormatConfig.mSuppressHexNotation) {
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mHexPrefix = "";
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} else {
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mHexPrefix = "$";
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}
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if (mFormatConfig.mUpperOperandA) {
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mAccChar = 'A';
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} else {
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mAccChar = 'a';
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}
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if (mFormatConfig.mUpperOperandXY) {
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mXregChar = 'X';
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mYregChar = 'Y';
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} else {
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mXregChar = 'x';
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mYregChar = 'y';
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}
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if (mFormatConfig.mUpperOperandS) {
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mSregChar = 'S';
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} else {
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mSregChar = 's';
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}
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}
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/// <summary>
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/// Formats a 24-bit offset value as hex.
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/// </summary>
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/// <param name="offset">Offset to format.</param>
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/// <returns>Formatted string.</returns>
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public string FormatOffset24(int offset) {
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if (string.IsNullOrEmpty(mOffset20Format)) {
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mOffset20Format = "+{0:" + mHexFmtChar + "6}";
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}
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return string.Format(mOffset20Format, offset & 0x0fffff);
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}
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/// <summary>
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/// Formats a value in hexadecimal. The width is padded with zeroes to make the
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/// length even (so it'll be $00, $0100, $010000, etc.) If minDigits is nonzero,
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/// additional zeroes may be added.
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/// </summary>
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/// <param name="value">Value to format, up to 32 bits.</param>
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/// <param name="minDigits">Minimum width, in printed digits (e.g. 4 is "0000").</param>
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/// <returns>Formatted string.</returns>
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public string FormatHexValue(int value, int minDigits) {
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int width = minDigits > 2 ? minDigits : 2;
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if (width < 8 && value > 0xffffff) {
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width = 8;
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} else if (width < 6 && value > 0xffff) {
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width = 6;
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} else if (width < 4 && value > 0xff) {
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width = 4;
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}
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int index = (width / 2) - 1;
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if (mHexValueFormats[index] == null) {
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mHexValueFormats[index] = mHexFmtChar + width.ToString();
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}
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return mHexPrefix + value.ToString(mHexValueFormats[index]);
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}
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/// <summary>
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/// Format a value as a number in the specified base.
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/// </summary>
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/// <param name="value">Value to format.</param>
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/// <param name="numBase">Numeric base (2, 10, or 16).</param>
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/// <returns>Formatted string.</returns>
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public string FormatValueInBase(int value, int numBase) {
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switch (numBase) {
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case 2:
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return FormatBinaryValue(value, 8);
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case 10:
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return FormatDecimalValue(value);
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case 16:
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return FormatHexValue(value, 2);
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default:
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Debug.Assert(false);
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return "???";
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}
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}
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/// <summary>
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/// Formats a value as decimal.
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/// </summary>
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/// <param name="value">Value to convert.</param>
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/// <returns>Formatted string.</returns>
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public string FormatDecimalValue(int value) {
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return value.ToString();
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}
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/// <summary>
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/// Formats a value in binary, padding with zeroes so the length is a multiple of 8.
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/// </summary>
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/// <param name="value">Value to convert.</param>
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/// <param name="minDigits">Minimum width, in printed digits. Will be rounded up to
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/// a multiple of 8.</param>
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/// <returns>Formatted string.</returns>
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public string FormatBinaryValue(int value, int minDigits) {
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string binaryStr = Convert.ToString(value, 2);
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int desiredWidth = ((binaryStr.Length + 7) / 8) * 8;
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if (desiredWidth < minDigits) {
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desiredWidth = ((minDigits + 7) / 8) * 8;
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}
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return '%' + binaryStr.PadLeft(desiredWidth, '0');
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}
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/// <summary>
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/// Formats a value as an ASCII character, surrounded by quotes. Must be a valid
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/// low- or high-ASCII value.
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/// </summary>
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/// <param name="value">Value to format.</param>
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/// <returns>Formatted string.</returns>
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private string FormatAsciiChar(int value) {
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Debug.Assert(CommonUtil.TextUtil.IsHiLoAscii(value));
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char ch = (char)(value & 0x7f);
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bool hiAscii = ((value & 0x80) != 0);
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StringBuilder sb;
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int method = -1;
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switch (method) {
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case 0:
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default:
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// Convention is from Merlin: single quote for low-ASCII, double-quote
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// for high-ASCII. Add a backslash if we're quoting the delimiter.
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sb = new StringBuilder(4);
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char quoteChar = ((value & 0x80) == 0) ? '\'' : '"';
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sb.Append(quoteChar);
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if (quoteChar == ch) {
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sb.Append('\\');
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}
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sb.Append(ch);
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sb.Append(quoteChar);
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break;
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case 1:
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// Convention is similar to Merlin, but with curly-quotes so it doesn't
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// look weird when quoting ' or ".
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sb = new StringBuilder(3);
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sb.Append(hiAscii ? '\u201c' : '\u2018');
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sb.Append(ch);
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sb.Append(hiAscii ? '\u201d' : '\u2019');
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break;
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case 2:
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// Always use apostrophe, but follow it with an up-arrow to indicate
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// that it's high-ASCII.
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sb = new StringBuilder(4);
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sb.Append("'");
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sb.Append(ch);
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sb.Append("'");
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if (hiAscii) {
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sb.Append('\u21e1'); // UPWARDS DASHED ARROW
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//sb.Append('\u2912'); // UPWARDS ARROW TO BAR
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}
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break;
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}
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return sb.ToString();
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}
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/// <summary>
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/// Formats a value as an ASCII character, if possible, or as a hex value.
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/// </summary>
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/// <param name="value">Value to format.</param>
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/// <returns>Formatted string.</returns>
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public string FormatAsciiOrHex(int value) {
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bool hiAscii = ((value & 0x80) != 0);
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if (hiAscii && !mFormatConfig.mAllowHighAsciiCharConst) {
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return FormatHexValue(value, 2);
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} else if (CommonUtil.TextUtil.IsHiLoAscii(value)) {
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return FormatAsciiChar(value);
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} else {
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return FormatHexValue(value, 2);
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}
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}
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/// <summary>
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/// Formats a 16- or 24-bit address value. This is intended for the left column
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/// of something (hex dump, code listing), not as an operand.
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/// </summary>
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/// <param name="address">Address to format.</param>
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/// <param name="showBank">Set to true for CPUs with 24-bit address spaces.</param>
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/// <returns>Formatted string.</returns>
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public string FormatAddress(int address, bool showBank) {
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if (mAddrFormatNoBank == null) {
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mAddrFormatNoBank = "{0:" + mHexFmtChar + "4}";
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mAddrFormatWithBank = "{0:" + mHexFmtChar + "2}/{1:" + mHexFmtChar + "4}";
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}
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if (showBank) {
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return string.Format(mAddrFormatWithBank, address >> 16, address & 0xffff);
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} else {
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return string.Format(mAddrFormatNoBank, address & 0xffff);
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}
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}
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/// <summary>
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/// Formats an adjustment, as "+decimal" or "-decimal". If no adjustment
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/// is required, an empty string is returned.
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/// </summary>
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/// <param name="adjValue">Adjustment value.</param>
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/// <returns>Formatted string.</returns>
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public string FormatAdjustment(int adjValue) {
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if (adjValue == 0) {
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return string.Empty;
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}
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// This formats in decimal with a leading '+' or '-'. To avoid adding a plus
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// on zero, we'd use "+#;-#;0", but we took care of the zero case above.
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return adjValue.ToString("+0;-#");
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}
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/// <summary>
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/// Formats the instruction opcode mnemonic, and caches the result.
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///
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/// It may be necessary to modify the mnemonic for some assemblers, e.g. LDA from a
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/// 24-bit address might need to be LDAL, even if the high byte is nonzero.
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/// </summary>
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/// <param name="op">Opcode to format</param>
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/// <param name="wdis">Width disambiguation specifier.</param>
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/// <returns>Formatted string.</returns>
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public string FormatOpcode(OpDef op, OpDef.WidthDisambiguation wdis) {
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// TODO(someday): using op.Opcode as the key is a bad idea, as the operation may
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// not be the same on different CPUs. We currently rely on the caller to discard
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// the Formatter when the CPU definition changes. We'd be better off keying off of
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// the OpDef object and factoring wdis in some other way.
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int key = op.Opcode | ((int)wdis << 8);
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if (!mOpcodeStrings.TryGetValue(key, out string opcodeStr)) {
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// Not found, generate value.
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opcodeStr = FormatMnemonic(op.Mnemonic, wdis);
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// Memoize.
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mOpcodeStrings[key] = opcodeStr;
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}
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return opcodeStr;
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}
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/// <summary>
|
|
/// Formats the string as an opcode mnemonic.
|
|
///
|
|
/// It may be necessary to modify the mnemonic for some assemblers, e.g. LDA from a
|
|
/// 24-bit address might need to be LDAL, even if the high byte is nonzero.
|
|
/// </summary>
|
|
/// <param name="mnemonic">Instruction mnemonic string.</param>
|
|
/// <param name="wdis">Width disambiguation specifier.</param>
|
|
/// <returns></returns>
|
|
public string FormatMnemonic(string mnemonic, OpDef.WidthDisambiguation wdis) {
|
|
string opcodeStr = mnemonic;
|
|
if (wdis == OpDef.WidthDisambiguation.ForceDirect) {
|
|
// nothing to do for opcode
|
|
} else if (wdis == OpDef.WidthDisambiguation.ForceAbs) {
|
|
if (!string.IsNullOrEmpty(mFormatConfig.mForceAbsOpcodeSuffix)) {
|
|
opcodeStr += mFormatConfig.mForceAbsOpcodeSuffix;
|
|
}
|
|
} else if (wdis == OpDef.WidthDisambiguation.ForceLong ||
|
|
wdis == OpDef.WidthDisambiguation.ForceLongMaybe) {
|
|
if (!string.IsNullOrEmpty(mFormatConfig.mForceLongOpcodeSuffix)) {
|
|
opcodeStr += mFormatConfig.mForceLongOpcodeSuffix;
|
|
}
|
|
} else {
|
|
Debug.Assert(wdis == OpDef.WidthDisambiguation.None);
|
|
}
|
|
if (mFormatConfig.mUpperOpcodes) {
|
|
opcodeStr = opcodeStr.ToUpperInvariant();
|
|
}
|
|
return opcodeStr;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Generates an operand format.
|
|
/// </summary>
|
|
/// <param name="addrMode">Addressing mode.</param>
|
|
/// <param name="wdis">Width disambiguation mode.</param>
|
|
/// <returns>Format string.</returns>
|
|
private string GenerateOperandFormat(OpDef.AddressMode addrMode,
|
|
OpDef.WidthDisambiguation wdis) {
|
|
string fmt;
|
|
string wdisStr = string.Empty;
|
|
|
|
if (wdis == OpDef.WidthDisambiguation.ForceDirect) {
|
|
if (!string.IsNullOrEmpty(mFormatConfig.mForceDirectOperandPrefix)) {
|
|
wdisStr = mFormatConfig.mForceDirectOperandPrefix;
|
|
}
|
|
} else if (wdis == OpDef.WidthDisambiguation.ForceAbs) {
|
|
if (!string.IsNullOrEmpty(mFormatConfig.mForceAbsOperandPrefix)) {
|
|
wdisStr = mFormatConfig.mForceAbsOperandPrefix;
|
|
}
|
|
} else if (wdis == OpDef.WidthDisambiguation.ForceLong) {
|
|
if (!string.IsNullOrEmpty(mFormatConfig.mForceLongOperandPrefix)) {
|
|
wdisStr = mFormatConfig.mForceLongOperandPrefix;
|
|
}
|
|
} else if (wdis == OpDef.WidthDisambiguation.ForceLongMaybe) {
|
|
// Don't add a width disambiguator to an operand that is unambiguously long.
|
|
} else {
|
|
Debug.Assert(wdis == OpDef.WidthDisambiguation.None);
|
|
}
|
|
|
|
switch (addrMode) {
|
|
case AddressMode.Abs:
|
|
case AddressMode.AbsLong:
|
|
case AddressMode.BlockMove:
|
|
case AddressMode.StackAbs:
|
|
case AddressMode.DP:
|
|
case AddressMode.PCRel:
|
|
case AddressMode.PCRelLong: // BRL
|
|
case AddressMode.StackInt: // BRK/COP
|
|
case AddressMode.StackPCRelLong: // PER
|
|
case AddressMode.WDM:
|
|
fmt = wdisStr + "{0}";
|
|
break;
|
|
case AddressMode.AbsIndexX:
|
|
case AddressMode.AbsIndexXLong:
|
|
case AddressMode.DPIndexX:
|
|
fmt = wdisStr + "{0}," + mXregChar;
|
|
break;
|
|
case AddressMode.DPIndexY:
|
|
case AddressMode.AbsIndexY:
|
|
fmt = wdisStr + "{0}," + mYregChar;
|
|
break;
|
|
case AddressMode.AbsIndexXInd:
|
|
case AddressMode.DPIndexXInd:
|
|
fmt = wdisStr + "({0}," + mXregChar + ")";
|
|
break;
|
|
case AddressMode.AbsInd:
|
|
case AddressMode.DPInd:
|
|
case AddressMode.StackDPInd: // PEI
|
|
fmt = "({0})";
|
|
break;
|
|
case AddressMode.AbsIndLong:
|
|
case AddressMode.DPIndLong:
|
|
// IIgs monitor uses "()" for AbsIndLong, E&L says "[]". Assemblers
|
|
// seem to expect the latter.
|
|
fmt = "[{0}]";
|
|
break;
|
|
case AddressMode.Acc:
|
|
fmt = "" + mAccChar;
|
|
break;
|
|
case AddressMode.DPIndIndexY:
|
|
fmt = "({0})," + mYregChar;
|
|
break;
|
|
case AddressMode.DPIndIndexYLong:
|
|
fmt = "[{0}]," + mYregChar;
|
|
break;
|
|
case AddressMode.Imm:
|
|
case AddressMode.ImmLongA:
|
|
case AddressMode.ImmLongXY:
|
|
fmt = "#{0}";
|
|
break;
|
|
case AddressMode.Implied:
|
|
case AddressMode.StackPull:
|
|
case AddressMode.StackPush:
|
|
case AddressMode.StackRTI:
|
|
case AddressMode.StackRTL:
|
|
case AddressMode.StackRTS:
|
|
fmt = string.Empty;
|
|
break;
|
|
case AddressMode.StackRel:
|
|
fmt = "{0}," + mSregChar;
|
|
break;
|
|
case AddressMode.StackRelIndIndexY:
|
|
fmt = "({0}," + mSregChar + ")," + mYregChar;
|
|
break;
|
|
|
|
case AddressMode.Unknown:
|
|
default:
|
|
Debug.Assert(false);
|
|
fmt = "???";
|
|
break;
|
|
}
|
|
|
|
return fmt;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Formats the instruction operand.
|
|
/// </summary>
|
|
/// <param name="op">Opcode definition (needed for address mode).</param>
|
|
/// <param name="contents">Label or numeric operand value.</param>
|
|
/// <param name="wdis">Width disambiguation value.</param>
|
|
/// <returns>Formatted string.</returns>
|
|
public string FormatOperand(OpDef op, string contents, OpDef.WidthDisambiguation wdis) {
|
|
Debug.Assert(((int)op.AddrMode & 0xff) == (int) op.AddrMode);
|
|
int key = (int) op.AddrMode | ((int)wdis << 8);
|
|
|
|
if (!mOperandFormats.TryGetValue(key, out string format)) {
|
|
format = mOperandFormats[key] = GenerateOperandFormat(op.AddrMode, wdis);
|
|
}
|
|
return string.Format(format, contents);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Formats a pseudo-opcode.
|
|
/// </summary>
|
|
/// <param name="opstr">Pseudo-op string to format.</param>
|
|
/// <returns>Formatted string.</returns>
|
|
public string FormatPseudoOp(string opstr) {
|
|
if (!mPseudoOpStrings.TryGetValue(opstr, out string result)) {
|
|
if (mFormatConfig.mUpperPseudoOpcodes) {
|
|
result = mPseudoOpStrings[opstr] = opstr.ToUpperInvariant();
|
|
} else {
|
|
result = mPseudoOpStrings[opstr] = opstr;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Generates a format string for N hex bytes.
|
|
/// </summary>
|
|
/// <param name="len">Number of bytes to handle in the format.</param>
|
|
private void GenerateByteFormat(int len) {
|
|
Debug.Assert(len <= MAX_BYTE_DUMP);
|
|
|
|
StringBuilder sb = new StringBuilder(len * 7);
|
|
for (int i = 0; i < len; i++) {
|
|
if (i != 0 && mFormatConfig.mSpacesBetweenBytes) {
|
|
sb.Append(' ');
|
|
}
|
|
// e.g. "{0:x2}"
|
|
sb.Append("{" + i + ":" + mHexFmtChar + "2}");
|
|
}
|
|
mByteDumpFormats[len - 1] = sb.ToString();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Formats 1-4 bytes as hex values.
|
|
/// </summary>
|
|
/// <param name="data">Data source.</param>
|
|
/// <param name="offset">Start offset within data array.</param>
|
|
/// <param name="length">Number of bytes to print. Fewer than this many may
|
|
/// actually appear.</param>
|
|
/// <returns>Formatted data string.</returns>
|
|
public string FormatBytes(byte[] data, int offset, int length) {
|
|
Debug.Assert(length > 0);
|
|
int printLen = length < MAX_BYTE_DUMP ? length : MAX_BYTE_DUMP;
|
|
if (string.IsNullOrEmpty(mByteDumpFormats[printLen - 1])) {
|
|
GenerateByteFormat(printLen);
|
|
}
|
|
string format = mByteDumpFormats[printLen - 1];
|
|
string result;
|
|
|
|
// The alternative is to allocate a temporary object[] and copy the integers
|
|
// into it, which requires boxing. We know we're only printing 1-4 bytes, so
|
|
// it's easier to just handle each case individually.
|
|
switch (printLen) {
|
|
case 1:
|
|
result = string.Format(format, data[offset]);
|
|
break;
|
|
case 2:
|
|
result = string.Format(format, data[offset], data[offset + 1]);
|
|
break;
|
|
case 3:
|
|
result = string.Format(format,
|
|
data[offset], data[offset + 1], data[offset + 2]);
|
|
break;
|
|
case 4:
|
|
result = string.Format(format,
|
|
data[offset], data[offset + 1], data[offset + 2], data[offset + 3]);
|
|
break;
|
|
default:
|
|
result = "INTERNAL ERROR";
|
|
break;
|
|
}
|
|
if (length > printLen) {
|
|
result += "...";
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Formats an end-of-line comment, prepending an end-of-line comment delimiter.
|
|
/// </summary>
|
|
/// <param name="comment">Comment string; may be empty.</param>
|
|
/// <returns>Formatted string.</returns>
|
|
public string FormatEolComment(string comment) {
|
|
if (string.IsNullOrEmpty(comment) ||
|
|
string.IsNullOrEmpty(mFormatConfig.mEndOfLineCommentDelimiter)) {
|
|
return comment;
|
|
} else {
|
|
return mFormatConfig.mEndOfLineCommentDelimiter + comment;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Formats a collection of bytes as a dense hex string.
|
|
/// </summary>
|
|
/// <param name="data">Data source.</param>
|
|
/// <param name="offset">Start offset within data array.</param>
|
|
/// <param name="length">Number of bytes to print.</param>
|
|
/// <returns>Formatted data string.</returns>
|
|
public string FormatDenseHex(byte[] data, int offset, int length) {
|
|
char[] hexChars = mFormatConfig.mUpperHexDigits ? sHexCharsUpper : sHexCharsLower;
|
|
char[] text = new char[length * 2];
|
|
for (int i = 0; i < length; i++) {
|
|
byte val = data[offset + i];
|
|
text[i * 2] = hexChars[val >> 4];
|
|
text[i * 2 + 1] = hexChars[val & 0x0f];
|
|
}
|
|
return new string(text);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Formats up to 16 bytes of data into a single line hex dump, in this format:
|
|
/// <pre>012345: 00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff 0123456789abcdef</pre>
|
|
/// </summary>
|
|
/// <param name="data">Reference to data.</param>
|
|
/// <param name="offset">Start offset.</param>
|
|
/// <returns>Formatted string.</returns>
|
|
public string FormatHexDump(byte[] data, int offset) {
|
|
FormatHexDumpCommon(data, offset);
|
|
// this is the only allocation
|
|
return new string(mHexDumpBuffer);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Formats up to 16 bytes of data into a single line hex dump. The output is
|
|
/// appended to the StringBuilder.
|
|
/// </summary>
|
|
/// <param name="data">Reference to data.</param>
|
|
/// <param name="offset">Start offset.</param>
|
|
/// <param name="sb">StringBuilder that receives output.</param>
|
|
public void FormatHexDump(byte[] data, int offset, StringBuilder sb) {
|
|
FormatHexDumpCommon(data, offset);
|
|
sb.Append(mHexDumpBuffer);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Formats up to 16 bytes of data into mHexDumpBuffer.
|
|
/// </summary>
|
|
private void FormatHexDumpCommon(byte[] data, int offset) {
|
|
Debug.Assert(offset >= 0 && offset < data.Length);
|
|
Debug.Assert(data.Length < (1 << 24));
|
|
const int dataCol = 8;
|
|
const int asciiCol = 57;
|
|
|
|
char[] hexChars = mFormatConfig.mUpperHexDigits ? sHexCharsUpper : sHexCharsLower;
|
|
char[] outBuf = mHexDumpBuffer;
|
|
|
|
// address field
|
|
int addr = offset;
|
|
for (int i = 5; i >= 0; i--) {
|
|
outBuf[i] = hexChars[addr & 0x0f];
|
|
addr >>= 4;
|
|
}
|
|
|
|
// hex digits and characters
|
|
int length = Math.Min(16, data.Length - offset);
|
|
int index;
|
|
for (index = 0; index < length; index++) {
|
|
byte val = data[offset + index];
|
|
outBuf[dataCol + index * 3] = hexChars[val >> 4];
|
|
outBuf[dataCol + index * 3 + 1] = hexChars[val & 0x0f];
|
|
outBuf[asciiCol + index] = CharConv(val);
|
|
}
|
|
|
|
// for partial line, clear out previous contents
|
|
for (; index < 16; index++) {
|
|
outBuf[dataCol + index * 3] =
|
|
outBuf[dataCol + index * 3 + 1] =
|
|
outBuf[asciiCol + index] = ' ';
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Converts a byte into printable form according to the current hex dump
|
|
/// character conversion mode.
|
|
/// </summary>
|
|
/// <param name="val">Value to convert.</param>
|
|
/// <returns>Printable character.</returns>
|
|
private char CharConv(byte val) {
|
|
char ch;
|
|
if (mFormatConfig.mHexDumpCharConvMode == FormatConfig.CharConvMode.HighLowAscii) {
|
|
ch = (char)(val & 0x7f);
|
|
} else {
|
|
ch = (char)val;
|
|
}
|
|
if (CommonUtil.TextUtil.IsPrintableAscii(ch)) {
|
|
return ch;
|
|
} else if (mFormatConfig.mHexDumpAsciiOnly) {
|
|
return '.';
|
|
} else {
|
|
// These values makes the hex dump ListView freak out.
|
|
//if (ch < 0x20) {
|
|
// return (char)(ch + '\u2400'); // Unicode "control pictures" block
|
|
//}
|
|
//return '\ufffd'; // Unicode "replacement character"
|
|
|
|
//return '\u00bf'; // INVERTED QUESTION MARK
|
|
return '\u00b7'; // MIDDLE DOT
|
|
}
|
|
}
|
|
}
|
|
}
|