mirror of
https://github.com/fadden/6502bench.git
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bc7a225080
Added a compiled C implementation of strlen(). The most interesting part about this is that it references a 16-bit value via direct-page address $ff, which means you'd want a local variable with address=$ff and width=2. The current UI prevents this.
414 lines
19 KiB
C#
414 lines
19 KiB
C#
/*
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* Copyright 2019 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;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Text.RegularExpressions;
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using CommonUtil;
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namespace SourceGen {
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/// <summary>
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/// Loads and maintains a collection of platform-specific symbols from a ".sym65" file.
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/// </summary>
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public class PlatformSymbols : IEnumerable<Symbol> {
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public const string FILENAME_EXT = ".sym65";
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private const string ERASE_VALUE_STR = "ERASE";
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public const int ERASE_VALUE = -1;
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public static readonly string FILENAME_FILTER = Res.Strings.FILE_FILTER_SYM65;
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/// <summary>
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/// Regex pattern for symbol definition in platform symbol file.
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///
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/// Alphanumeric ASCII + underscore for label, which must start at beginning of line.
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/// Value is somewhat arbitrary, but ends if we see a comment delimiter (semicolon) or
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/// whitespace. Spaces are allowed between tokens, but not required. Value, width,
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/// and mask may be hex, decimal, or binary; these are simply tokenized by regex.
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///
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/// Looks like:
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/// NAME {@,=,<,>} VALUE [WIDTH] [;COMMENT]
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///
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/// Regex output groups are:
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/// 1. NAME (2+ alphanumeric or underscore, cannot start with number)
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/// 2. type/direction char
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/// 3. VALUE (can be any non-whitespace)
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/// 4. optional: WIDTH (can be any non-whitespace)
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/// 5. optional: COMMENT with leading ';'
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/// </summary>
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/// <remarks>
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/// If you want to make sense of this, I highly recommend https://regex101.com/ .
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/// </remarks>
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private const string SYMBOL_PATTERN =
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@"^([A-Za-z_][A-Za-z0-9_]+)\s*([@=<>])\s*([^\s;]+)\s*([^\s;]+)?\s*(;.*)?$";
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private static Regex sNameValueRegex = new Regex(SYMBOL_PATTERN);
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private const int GROUP_NAME = 1;
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private const int GROUP_TYPE = 2;
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private const int GROUP_VALUE = 3;
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private const int GROUP_WIDTH = 4;
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private const int GROUP_COMMENT = 5;
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/// <summary>
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/// Regex pattern for mask definition in platform symbol file. This mostly just
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/// performs tokenization. Syntax and validity checking is done later.
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///
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/// Looks like:
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/// CMP_MASK CMP_VALUE ADDR_MASK [;COMMENT]
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/// </summary>
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private const string MULTI_MASK_PATTERN =
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@"^\s*([^\s]+)\s*([^\s]+)\s*([^\s;]+)\s*(;.*)?$";
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private static Regex sMaskRegex = new Regex(MULTI_MASK_PATTERN);
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private const string MULTI_MASK_CMD = "*MULTI_MASK";
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private const string TAG_CMD = "*TAG";
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/// <summary>
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/// List of symbols. We keep them sorted by label because labels must be unique.
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/// </summary>
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private SortedList<string, Symbol> mSymbols =
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new SortedList<string, Symbol>(Asm65.Label.LABEL_COMPARER);
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public PlatformSymbols() { }
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// IEnumerable
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public IEnumerator<Symbol> GetEnumerator() {
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return mSymbols.Values.GetEnumerator();
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}
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// IEnumerable
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IEnumerator IEnumerable.GetEnumerator() {
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return mSymbols.Values.GetEnumerator();
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}
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public bool ContainsKey(string label) {
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return mSymbols.ContainsKey(label);
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}
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/// <summary>
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/// Loads platform symbols.
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/// </summary>
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/// <param name="fileIdent">External file identifier of symbol file.</param>
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/// <param name="projectDir">Full path to project directory.</param>
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/// <param name="loadOrdinal">Platform file load order.</param>
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/// <param name="report">Report of warnings and errors.</param>
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/// <returns>True on success (no errors), false on failure.</returns>
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public bool LoadFromFile(string fileIdent, string projectDir, int loadOrdinal,
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out FileLoadReport report) {
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report = new FileLoadReport(fileIdent);
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ExternalFile ef = ExternalFile.CreateFromIdent(fileIdent);
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if (ef == null) {
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report.Add(FileLoadItem.Type.Error,
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CommonUtil.Properties.Resources.ERR_FILE_NOT_FOUND + ": " + fileIdent);
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return false;
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}
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string pathName = ef.GetPathName(projectDir);
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if (pathName == null) {
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report.Add(FileLoadItem.Type.Error,
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Res.Strings.ERR_BAD_IDENT + ": " + fileIdent);
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return false;
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}
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// These files shouldn't be enormous. Just read the entire thing into a string array.
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string[] lines;
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try {
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lines = File.ReadAllLines(pathName);
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} catch (IOException ioe) {
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Debug.WriteLine("Platform symbol load failed: " + ioe);
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report.Add(FileLoadItem.Type.Error,
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CommonUtil.Properties.Resources.ERR_FILE_NOT_FOUND + ": " + pathName);
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return false;
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}
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string tag = string.Empty;
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DefSymbol.MultiAddressMask multiMask = null;
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int lineNum = 0;
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foreach (string line in lines) {
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lineNum++; // first line is line 1, says Vim and VisualStudio
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if (string.IsNullOrEmpty(line) || line[0] == ';') {
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// ignore
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} else if (line[0] == '*') {
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if (line.StartsWith(TAG_CMD)) {
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tag = ParseTag(line);
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} else if (line.StartsWith(MULTI_MASK_CMD)) {
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if (!ParseMask(line, out multiMask, out string badMaskMsg)) {
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report.Add(lineNum, FileLoadItem.NO_COLUMN, FileLoadItem.Type.Warning,
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badMaskMsg);
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}
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//Debug.WriteLine("Mask is now " + mask.ToString("x6"));
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} else {
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// Do something clever with *SYNOPSIS?
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Debug.WriteLine("Ignoring CMD: " + line);
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}
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} else {
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MatchCollection matches = sNameValueRegex.Matches(line);
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if (matches.Count == 1) {
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// Our label regex is the same as Asm65.Label's definition; no need
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// for further validation on the label.
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string label = matches[0].Groups[GROUP_NAME].Value;
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char typeAndDir = matches[0].Groups[GROUP_TYPE].Value[0];
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bool isConst = (typeAndDir == '=');
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DefSymbol.DirectionFlags direction = DefSymbol.DirectionFlags.ReadWrite;
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if (typeAndDir == '<') {
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direction = DefSymbol.DirectionFlags.Read;
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} else if (typeAndDir == '>') {
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direction = DefSymbol.DirectionFlags.Write;
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}
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string badParseMsg;
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int value, numBase;
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bool parseOk;
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string valueStr = matches[0].Groups[GROUP_VALUE].Value;
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if (isConst) {
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// Allow various numeric options, and preserve the value. We
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// don't limit the value range.
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parseOk = Asm65.Number.TryParseInt(valueStr, out value, out numBase);
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badParseMsg =
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CommonUtil.Properties.Resources.ERR_INVALID_NUMERIC_CONSTANT;
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} else if (valueStr.ToUpperInvariant().Equals(ERASE_VALUE_STR)) {
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parseOk = true;
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value = ERASE_VALUE;
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numBase = 10;
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badParseMsg = CommonUtil.Properties.Resources.ERR_INVALID_ADDRESS;
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} else {
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// Allow things like "05/1000". Always hex.
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numBase = 16;
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parseOk = Asm65.Address.ParseAddress(valueStr, (1 << 24) - 1,
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out value);
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// limit to positive 24-bit values
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parseOk &= (value >= 0 && value < 0x01000000);
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badParseMsg = CommonUtil.Properties.Resources.ERR_INVALID_ADDRESS;
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}
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int width = -1;
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string widthStr = matches[0].Groups[GROUP_WIDTH].Value;
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if (parseOk && !string.IsNullOrEmpty(widthStr)) {
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parseOk = Asm65.Number.TryParseInt(widthStr, out width,
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out int ignoredBase);
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if (parseOk) {
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if (width < DefSymbol.MIN_WIDTH || width > DefSymbol.MAX_WIDTH) {
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parseOk = false;
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badParseMsg = Res.Strings.ERR_INVALID_WIDTH;
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}
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} else {
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badParseMsg =
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CommonUtil.Properties.Resources.ERR_INVALID_NUMERIC_CONSTANT;
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}
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}
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if (parseOk && multiMask != null && !isConst) {
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// We need to ensure that all possible values fit within the mask.
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// We don't test AddressValue here, because it's okay for the
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// canonical value to be outside the masked range.
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int testWidth = (width > 0) ? width : 1;
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for (int testValue = value; testValue < value + testWidth; testValue++) {
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if ((testValue & multiMask.CompareMask) != multiMask.CompareValue) {
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parseOk = false;
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badParseMsg = Res.Strings.ERR_VALUE_INCOMPATIBLE_WITH_MASK;
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Debug.WriteLine("Mask FAIL: value=" + value.ToString("x6") +
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" width=" + width +
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" testValue=" + testValue.ToString("x6") +
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" mask=" + multiMask);
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break;
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}
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}
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}
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if (!parseOk) {
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report.Add(lineNum, FileLoadItem.NO_COLUMN, FileLoadItem.Type.Warning,
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badParseMsg);
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} else {
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string comment = matches[0].Groups[GROUP_COMMENT].Value;
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if (comment.Length > 0) {
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// remove ';'
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comment = comment.Substring(1);
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}
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FormatDescriptor.SubType subType =
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FormatDescriptor.GetSubTypeForBase(numBase);
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DefSymbol symDef = new DefSymbol(label, value, Symbol.Source.Platform,
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isConst ? Symbol.Type.Constant : Symbol.Type.ExternalAddr,
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subType, width, width > 0, comment, direction, multiMask,
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tag, loadOrdinal, fileIdent);
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if (mSymbols.ContainsKey(label)) {
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// This is very easy to do -- just define the same symbol twice
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// in the same file. We don't really need to do anything about
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// it though.
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Debug.WriteLine("NOTE: stomping previous definition of " + label);
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}
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mSymbols[label] = symDef;
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}
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} else {
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report.Add(lineNum, FileLoadItem.NO_COLUMN, FileLoadItem.Type.Warning,
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CommonUtil.Properties.Resources.ERR_SYNTAX);
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}
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}
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}
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return !report.HasErrors;
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}
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/// <summary>
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/// Parses the tag out of a tag command line. The tag is pretty much everything after
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/// the "*TAG", with whitespace stripped off the start and end. The empty string
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/// is valid.
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/// </summary>
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/// <param name="line">Line to parse.</param>
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/// <returns>Tag string.</returns>
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private string ParseTag(string line) {
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Debug.Assert(line.StartsWith(TAG_CMD));
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string tag = line.Substring(TAG_CMD.Length).Trim();
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return tag;
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}
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/// <summary>
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/// Parses the mask value out of a mask command line.
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/// </summary>
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/// <param name="line">Line to parse.</param>
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/// <param name="multiMask">Parsed mask value, or null if the line was empty.</param>
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/// <returns>True if the mask was parsed successfully.</returns>
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private bool ParseMask(string line, out DefSymbol.MultiAddressMask multiMask,
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out string badMaskMsg) {
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Debug.Assert(line.StartsWith(MULTI_MASK_CMD));
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const int MIN = 0;
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const int MAX = 0x00ffffff;
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badMaskMsg = Res.Strings.ERR_INVALID_MULTI_MASK;
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multiMask = null;
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string maskStr = line.Substring(MULTI_MASK_CMD.Length).Trim();
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if (string.IsNullOrEmpty(maskStr)) {
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// empty line, disable mask
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return true;
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}
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MatchCollection matches = sMaskRegex.Matches(maskStr);
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if (matches.Count != 1) {
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return false;
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}
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string cmpMaskStr = matches[0].Groups[1].Value;
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string cmpValueStr = matches[0].Groups[2].Value;
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string addrMaskStr = matches[0].Groups[3].Value;
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int cmpMask, cmpValue, addrMask, ignoredBase;
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if (!Asm65.Number.TryParseInt(cmpMaskStr, out cmpMask, out ignoredBase) ||
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cmpMask < MIN || cmpMask > MAX) {
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Debug.WriteLine("Bad cmpMask: " + cmpMaskStr);
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badMaskMsg = Res.Strings.ERR_INVALID_COMPARE_MASK;
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return false;
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}
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if (!Asm65.Number.TryParseInt(cmpValueStr, out cmpValue, out ignoredBase) ||
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cmpValue < MIN || cmpValue > MAX) {
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Debug.WriteLine("Bad cmpValue: " + cmpValueStr);
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badMaskMsg = Res.Strings.ERR_INVALID_COMPARE_VALUE;
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return false;
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}
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if (!Asm65.Number.TryParseInt(addrMaskStr, out addrMask, out ignoredBase) ||
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addrMask < MIN || addrMask > MAX) {
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Debug.WriteLine("Bad addrMask: " + addrMaskStr);
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badMaskMsg = Res.Strings.ERR_INVALID_ADDRESS_MASK;
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return false;
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}
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// The two masks should not overlap: one represents bits that must be in a
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// specific state for a match to exist, the other indicates which bits are used
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// to select a specific register. This should be a warning.
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if ((cmpMask & ~addrMask) != cmpMask) {
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Debug.WriteLine("Warning: cmpMask/addrMask overlap");
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badMaskMsg = Res.Strings.ERR_INVALID_CMP_ADDR_OVERLAP;
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return false;
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}
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// If cmpValue has bits set that aren't in cmpMask, we will never find a match.
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if ((cmpValue & ~cmpMask) != 0) {
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Debug.WriteLine("cmpValue has unexpected bits set");
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badMaskMsg = Res.Strings.ERR_INVALID_CMP_EXTRA_BITS;
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return false;
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}
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multiMask = new DefSymbol.MultiAddressMask(cmpMask, cmpValue, addrMask);
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return true;
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}
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/// <summary>
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/// One-off function to convert the IIgs toolbox function info from NList.Data.TXT
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/// to .sym65 format. Doesn't really belong in here, but I'm too lazy to put it
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/// anywhere else.
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/// </summary>
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public static void ConvertNiftyListToolboxFuncs(string inPath, string outPath) {
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const string TOOL_START = "* System tools";
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const string TOOL_END = "* User tools";
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const string PATTERN = @"^([0-9a-fA-F]{4}) (\w+)(.*)";
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Regex parseRegex = new Regex(PATTERN);
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System.Text.StringBuilder sb = new System.Text.StringBuilder();
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string[] lines = File.ReadAllLines(inPath);
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List<String> outs = new List<string>();
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bool inTools = false;
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foreach (string line in lines) {
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if (line == TOOL_START) {
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inTools = true;
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continue;
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} else if (line == TOOL_END) {
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break;
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}
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if (!inTools) {
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continue;
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}
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if (line.Substring(5, 4) == "=== ") {
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// make this a comment
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outs.Add("; " + line.Substring(5));
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continue;
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}
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MatchCollection matches = parseRegex.Matches(line);
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if (matches.Count != 1) {
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Debug.WriteLine("NConv: bad match on '" + line + "'");
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outs.Add("; " + line);
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continue;
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}
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GroupCollection group = matches[0].Groups;
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string outStr;
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if (matches[0].Groups.Count != 4) {
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Debug.WriteLine("NConv: partial match (" + group.Count + ") on '" +
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line + "'");
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outStr = ";" + group[0];
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} else {
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sb.Clear();
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sb.Append(group[2]);
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while (sb.Length < 19) { // not really worried about speed
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sb.Append(' ');
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}
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sb.Append(" = $");
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sb.Append(group[1]);
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while (sb.Length < 32) {
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sb.Append(' ');
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}
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sb.Append(';');
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sb.Append(group[3]);
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outs.Add(sb.ToString());
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}
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}
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File.WriteAllLines(outPath, outs);
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Debug.WriteLine("NConv complete (" + outs.Count + " lines)");
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}
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}
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}
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