mirror of
https://github.com/fadden/6502bench.git
synced 2024-10-31 19:04:44 +00:00
461 lines
20 KiB
C#
461 lines
20 KiB
C#
/*
|
|
* Copyright 2018 faddenSoft
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
using System;
|
|
using System.Diagnostics;
|
|
|
|
using Asm65;
|
|
using CommonUtil;
|
|
|
|
/*
|
|
*** When is a full (code+data) re-analysis required?
|
|
- Adding/removing/changing an address change (ORG directive). This has a significant impact
|
|
on the code analyzer, as blocks of code may become reachable or unreachable.
|
|
- Adding/removing/changing a type hint. These can affect whether a given offset is treated
|
|
as code, which can have a dramatic effect on code analysis (consider the offset 0 code hint).
|
|
- Adding/removing/changing a status flag override. This can affect whether a branch is
|
|
always taken or never taken, and the M/X flags affect instruction interpretation. (It may
|
|
be possible to do an "incremental" code analysis here, working from the point of the change
|
|
forward, propagating changes outward, but that gets tricky when a branch changes from
|
|
ambiguously-taken to never-taken, and the destination may need to be treated as data.)
|
|
|
|
*** When is a partial (data-only) re-analysis required?
|
|
- Adding/removing a user label. The code that tries to adjust data targets to match nearby
|
|
user labels must be re-run, possibly impacting auto-generated labels. A user label added
|
|
to the middle of a multi-byte data element will cause the element to be split, requiring
|
|
reanalysis of the pieces.
|
|
- Adding/removing/changing an operand label, e.g "LDA label". This can affect which
|
|
offsets are marked as data targets, which affects the data analyzer. (We could be smart
|
|
about this and not invoke reanalysis if the label value matches the operand, but address
|
|
operands should already have labels via offset reference, so it's unclear how valuable
|
|
this would be.)
|
|
- Adding/removing/changing a format descriptor with a symbol or Numeric/Address. This
|
|
can affect the data target analysis.
|
|
|
|
*** When is a partial (late-data) re-analysis required?
|
|
- Adding/removing/changing the length of a formatted data item, when that item isn't subject
|
|
to conditions above (e.g. the descriptor doesn't specify a symbol). This affects which bytes
|
|
are considered "uncategorized", so the uncategorized-data analysis must be repeated.
|
|
|
|
*** When is display-only re-analysis needed?
|
|
- When altering the way that data is formatted, it's useful to exercise the same code paths,
|
|
up to the point where the analyzer is called. We still want to go through all the steps that
|
|
update the display list and cause controls to be redrawn, but we don't want to actually change
|
|
anything in the DisasmProject. "Misc" means we do nothing but pretend there was a full update.
|
|
|
|
*** When can we get away with only updating part of the display list (re-analysis=none)?
|
|
- Changing a user label. All lines that reference the label need to be updated in the
|
|
display, but nothing in the analysis changes. (This assumes we prevent you from renaming
|
|
a label to be the same as an existing label, e.g. auto-generated labels.)
|
|
- Adding/removing/changing cosmetic items, like comments and notes.
|
|
|
|
NOTE: all re-analysis requirements are symmetric for undo/redo. Undoing a change requires
|
|
the same level of work as doing the change.
|
|
*/
|
|
|
|
namespace SourceGen {
|
|
/// <summary>
|
|
/// A single change.
|
|
/// </summary>
|
|
public class UndoableChange {
|
|
public enum ChangeType {
|
|
Unknown = 0,
|
|
|
|
// Dummy change, used to force a full update.
|
|
Dummy,
|
|
|
|
// Adds, updates, or removes an AddressMap entry.
|
|
SetAddress,
|
|
|
|
// Changes the type hint.
|
|
SetTypeHint,
|
|
|
|
// Adds, updates, or removes a processor status flag override.
|
|
SetStatusFlagOverride,
|
|
|
|
// Adds, updates, or removes a user-specified label.
|
|
SetLabel,
|
|
|
|
// Adds, updates, or removes a data or operand format.
|
|
SetOperandFormat,
|
|
|
|
// Changes the end-of-line comment.
|
|
SetComment,
|
|
|
|
// Changes the long comment.
|
|
SetLongComment,
|
|
|
|
// Changes the note.
|
|
SetNote,
|
|
|
|
// Updates project properties.
|
|
SetProjectProperties
|
|
}
|
|
|
|
/// <summary>
|
|
/// Enum indicating what needs to be reanalyzed after a change.
|
|
/// </summary>
|
|
public enum ReanalysisScope {
|
|
None = 0,
|
|
DisplayOnly,
|
|
DataOnly,
|
|
CodeAndData
|
|
}
|
|
|
|
/// <summary>
|
|
/// Identifies the change type.
|
|
/// </summary>
|
|
public ChangeType Type { get; private set; }
|
|
|
|
/// <summary>
|
|
/// The "root offset". For example, changing the type hint for a 4-byte
|
|
/// instruction from code to data will actually affect 4 offsets, but we
|
|
/// only need to specify the root item.
|
|
/// </summary>
|
|
public int Offset { get; private set; }
|
|
|
|
/// <summary>
|
|
/// Value we're changing to.
|
|
/// </summary>
|
|
public object NewValue { get; private set; }
|
|
|
|
/// <summary>
|
|
/// Previous value, used for "undo".
|
|
/// </summary>
|
|
public object OldValue { get; private set; }
|
|
|
|
/// <summary>
|
|
/// Indicates what amount of reanalysis is required after the change is implemented.
|
|
/// </summary>
|
|
public ReanalysisScope ReanalysisRequired { get; private set; }
|
|
|
|
|
|
// Don't instantiate directly.
|
|
private UndoableChange() { }
|
|
|
|
public bool HasOffset {
|
|
get {
|
|
switch (Type) {
|
|
case ChangeType.Dummy:
|
|
case ChangeType.SetTypeHint:
|
|
case ChangeType.SetProjectProperties:
|
|
return false;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange that does nothing but force an update.
|
|
/// </summary>
|
|
/// <param name="flags">Desired reanalysis flags.</param>
|
|
/// <returns>Change record.</returns>
|
|
public static UndoableChange CreateDummyChange(ReanalysisScope flags) {
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.Dummy;
|
|
uc.Offset = -1;
|
|
uc.ReanalysisRequired = flags;
|
|
return uc;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for an address map update.
|
|
/// </summary>
|
|
/// <param name="offset">Affected offset.</param>
|
|
/// <param name="oldAddress">Previous address map entry, or -1 if none.</param>
|
|
/// <param name="newAddress">New address map entry, or -1 if none.</param>
|
|
/// <returns>Change record.</returns>
|
|
public static UndoableChange CreateAddressChange(int offset, int oldAddress,
|
|
int newAddress) {
|
|
if (oldAddress == newAddress) {
|
|
Debug.WriteLine("No-op address change at +" + offset.ToString("x6") +
|
|
": " + oldAddress);
|
|
}
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.SetAddress;
|
|
uc.Offset = offset;
|
|
uc.OldValue = oldAddress;
|
|
uc.NewValue = newAddress;
|
|
uc.ReanalysisRequired = ReanalysisScope.CodeAndData;
|
|
return uc;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for a type hint update. Rather than adding a
|
|
/// separate UndoableChange for each affected offset -- which could span the
|
|
/// entire file -- we use range sets to record the before/after state.
|
|
/// </summary>
|
|
/// <param name="undoSet">Current values.</param>
|
|
/// <param name="newSet">New values.</param>
|
|
/// <returns>Change record.</returns>
|
|
public static UndoableChange CreateTypeHintChange(TypedRangeSet undoSet,
|
|
TypedRangeSet newSet) {
|
|
if (newSet.Count == 0) {
|
|
Debug.WriteLine("Empty hint change?");
|
|
}
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.SetTypeHint;
|
|
uc.Offset = -1;
|
|
uc.OldValue = undoSet;
|
|
uc.NewValue = newSet;
|
|
// Any hint change can affect whether something is treated as code.
|
|
// Either we're deliberately setting it as code or non-code, or we're
|
|
// setting it to "no hint", which means the code analyzer gets
|
|
// to make the decision now. This requires a full code+data re-analysis.
|
|
uc.ReanalysisRequired = ReanalysisScope.CodeAndData;
|
|
return uc;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for a status flag override update.
|
|
/// </summary>
|
|
/// <param name="offset">Affected offset.</param>
|
|
/// <param name="oldFlags">Current flags.</param>
|
|
/// <param name="newFlags">New flags.</param>
|
|
/// <returns></returns>
|
|
public static UndoableChange CreateStatusFlagChange(int offset, StatusFlags oldFlags,
|
|
StatusFlags newFlags) {
|
|
if (oldFlags == newFlags) {
|
|
Debug.WriteLine("No-op status flag change at " + offset);
|
|
}
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.SetStatusFlagOverride;
|
|
uc.Offset = offset;
|
|
uc.OldValue = oldFlags;
|
|
uc.NewValue = newFlags;
|
|
// This can affect instruction widths (for M/X) and conditional branches. We
|
|
// don't need to re-analyze for changes to I/D, but users don't really need to
|
|
// change those anyway, so it's not worth optimizing.
|
|
uc.ReanalysisRequired = ReanalysisScope.CodeAndData;
|
|
return uc;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for a label update.
|
|
/// </summary>
|
|
/// <param name="offset">Affected offset.</param>
|
|
/// <param name="oldSymbol">Current label. May be null.</param>
|
|
/// <param name="newSymbol">New label. May be null.</param>
|
|
/// <returns>Change record.</returns>
|
|
public static UndoableChange CreateLabelChange(int offset, Symbol oldSymbol,
|
|
Symbol newSymbol) {
|
|
if (oldSymbol == newSymbol) {
|
|
Debug.WriteLine("No-op label change at +" + offset.ToString("x6") +
|
|
": " + oldSymbol);
|
|
}
|
|
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.SetLabel;
|
|
uc.Offset = offset;
|
|
uc.OldValue = oldSymbol;
|
|
uc.NewValue = newSymbol;
|
|
// Data analysis can change if we add or remove a label in a data area. Label
|
|
// selection can change as well, e.g. switching from an auto-label to a user
|
|
// label with an adjustment. So renaming a user-defined label doesn't require
|
|
// reanalysis, but adding or removing one does.
|
|
//
|
|
// Do the reanalysis if either is empty. This will cause an unnecessary
|
|
// reanalysis if we change an empty label to an empty label, but that shouldn't
|
|
// be allowed by the UI anyway.
|
|
Debug.Assert(newSymbol == null || newSymbol.SymbolSource == Symbol.Source.User);
|
|
if ((oldSymbol == null) || (newSymbol == null) /*||
|
|
(oldSymbol.SymbolSource != newSymbol.SymbolSource)*/) {
|
|
uc.ReanalysisRequired = ReanalysisScope.DataOnly;
|
|
} else {
|
|
uc.ReanalysisRequired = ReanalysisScope.None;
|
|
}
|
|
return uc;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for an operand or data format update. This method
|
|
/// refuses to create a change for a no-op, returning null instead. This will
|
|
/// convert a FormatDescriptor with type REMOVE to null, with the intention of
|
|
/// removing the descriptor from the format set.
|
|
/// </summary>
|
|
/// <param name="offset">Affected offset.</param>
|
|
/// <param name="oldFormat">Current format. May be null.</param>
|
|
/// <param name="newFormat">New format. May be null.</param>
|
|
/// <returns>Change record, or null for a no-op change.</returns>
|
|
public static UndoableChange CreateActualOperandFormatChange(int offset,
|
|
FormatDescriptor oldFormat, FormatDescriptor newFormat) {
|
|
if (newFormat != null && newFormat.FormatType == FormatDescriptor.Type.REMOVE) {
|
|
Debug.WriteLine("CreateOperandFormatChange: converting REMOVE to null");
|
|
newFormat = null;
|
|
}
|
|
if (oldFormat == newFormat) {
|
|
Debug.WriteLine("No-op format change at +" + offset.ToString("x6") +
|
|
": " + oldFormat);
|
|
return null;
|
|
}
|
|
|
|
return CreateOperandFormatChange(offset, oldFormat, newFormat);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for an operand or data format update.
|
|
/// </summary>
|
|
/// <param name="offset">Affected offset.</param>
|
|
/// <param name="oldFormat">Current format. May be null.</param>
|
|
/// <param name="newFormat">New format. May be null.</param>
|
|
/// <returns>Change record.</returns>
|
|
public static UndoableChange CreateOperandFormatChange(int offset,
|
|
FormatDescriptor oldFormat, FormatDescriptor newFormat) {
|
|
if (oldFormat == newFormat) {
|
|
Debug.WriteLine("No-op format change at +" + offset.ToString("x6") +
|
|
": " + oldFormat);
|
|
}
|
|
|
|
// We currently allow old/new formats with different lengths. There doesn't
|
|
// seem to be a reason not to, and a slight performance advantage to doing so.
|
|
// Also, if a change set has two changes at the same offset, undo requires
|
|
// enumerating the list in reverse order.
|
|
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.SetOperandFormat;
|
|
uc.Offset = offset;
|
|
uc.OldValue = oldFormat;
|
|
uc.NewValue = newFormat;
|
|
|
|
// Data-only reanalysis is required if the old or new format has a label. Simply
|
|
// changing from e.g. default to decimal, or decimal to binary, doesn't matter.
|
|
// (The format editing code ensures that labels don't appear in the middle of
|
|
// a formatted region.) Adding, removing, or changing a symbol can change the
|
|
// layout of uncategorized data, affect data targets, xrefs, etc.
|
|
//
|
|
// We can't only check for a symbol, though, because Numeric/Address will
|
|
// create an auto-label if the reference is within the file.
|
|
//
|
|
// If the number of bytes covered by the format changes, or we're adding or
|
|
// removing a format, we need to redo the analysis of uncategorized data. For
|
|
// example, an auto-detected string could get larger or smaller. We don't
|
|
// currently have a separate flag for just that. Also, because we're focused
|
|
// on just one change, we can't skip reanalysis when (say) one 4-byte numeric
|
|
// is converted to two two-byte numerics.
|
|
if ((oldFormat != null && oldFormat.HasSymbolOrAddress) ||
|
|
(newFormat != null && newFormat.HasSymbolOrAddress)) {
|
|
uc.ReanalysisRequired = ReanalysisScope.DataOnly;
|
|
} else if (oldFormat == null || newFormat == null ||
|
|
oldFormat.Length != newFormat.Length) {
|
|
uc.ReanalysisRequired = ReanalysisScope.DataOnly;
|
|
} else {
|
|
uc.ReanalysisRequired = ReanalysisScope.None;
|
|
}
|
|
return uc;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for a comment update.
|
|
/// </summary>
|
|
/// <param name="offset">Affected offset.</param>
|
|
/// <param name="oldComment">Current comment.</param>
|
|
/// <param name="newComment">New comment.</param>
|
|
/// <returns>Change record.</returns>
|
|
public static UndoableChange CreateCommentChange(int offset, string oldComment,
|
|
string newComment) {
|
|
if (oldComment.Equals(newComment)) {
|
|
Debug.WriteLine("No-op comment change at +" + offset.ToString("x6") +
|
|
": " + oldComment);
|
|
}
|
|
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.SetComment;
|
|
uc.Offset = offset;
|
|
uc.OldValue = oldComment;
|
|
uc.NewValue = newComment;
|
|
uc.ReanalysisRequired = ReanalysisScope.None;
|
|
return uc;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for a long comment update.
|
|
/// </summary>
|
|
/// <param name="offset">Affected offset.</param>
|
|
/// <param name="oldComment">Current comment.</param>
|
|
/// <param name="newComment">New comment.</param>
|
|
/// <returns>Change record.</returns>
|
|
public static UndoableChange CreateLongCommentChange(int offset,
|
|
MultiLineComment oldComment, MultiLineComment newComment) {
|
|
if (oldComment == newComment) {
|
|
Debug.WriteLine("No-op long comment change at +" + offset.ToString("x6") +
|
|
": " + oldComment);
|
|
}
|
|
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.SetLongComment;
|
|
uc.Offset = offset;
|
|
uc.OldValue = oldComment;
|
|
uc.NewValue = newComment;
|
|
uc.ReanalysisRequired = ReanalysisScope.None;
|
|
return uc;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for a note update.
|
|
/// </summary>
|
|
/// <param name="offset">Affected offset.</param>
|
|
/// <param name="oldNote">Current note.</param>
|
|
/// <param name="newNote">New note.</param>
|
|
/// <returns>Change record.</returns>
|
|
public static UndoableChange CreateNoteChange(int offset,
|
|
MultiLineComment oldNote, MultiLineComment newNote) {
|
|
if (oldNote == newNote) {
|
|
Debug.WriteLine("No-op note change at +" + offset.ToString("x6") +
|
|
": " + oldNote);
|
|
}
|
|
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.SetNote;
|
|
uc.Offset = offset;
|
|
uc.OldValue = oldNote;
|
|
uc.NewValue = newNote;
|
|
uc.ReanalysisRequired = ReanalysisScope.None;
|
|
return uc;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates an UndoableChange for a change to the project properties.
|
|
/// </summary>
|
|
/// <param name="oldNote">Current note.</param>
|
|
/// <param name="newNote">New note.</param>
|
|
/// <returns>Change record.</returns>
|
|
public static UndoableChange CreateProjectPropertiesChange(ProjectProperties oldProps,
|
|
ProjectProperties newProps) {
|
|
Debug.Assert(oldProps != null && newProps != null);
|
|
if (oldProps == newProps) { // doesn't currently work except as reference check
|
|
Debug.WriteLine("No-op property change: " + oldProps);
|
|
}
|
|
|
|
UndoableChange uc = new UndoableChange();
|
|
uc.Type = ChangeType.SetProjectProperties;
|
|
uc.Offset = -1;
|
|
uc.OldValue = oldProps;
|
|
uc.NewValue = newProps;
|
|
|
|
// Project properties could change the CPU type, requiring a full code+data
|
|
// reanalysis. We could scan the objects to see what actually changed, but that
|
|
// doesn't seem worthwhile.
|
|
uc.ReanalysisRequired = ReanalysisScope.CodeAndData;
|
|
return uc;
|
|
}
|
|
|
|
public override string ToString() {
|
|
return "[UC type=" + Type + " offset=+" +
|
|
(HasOffset ? Offset.ToString("x6") : "N/A") + "]";
|
|
}
|
|
}
|
|
}
|