Applies various changes from upstream

WeCantSpell.Hunspell.Tests/HunspellTests.cs

@@ -184,7 +184,7 @@ public async Task words_without_suggestions_offer_no_suggestions(string dictiona
         [InlineData("files/rep.dic", "un'alunno", new[] { "un alunno" })]
         [InlineData("files/rep.dic", "foo", new[] { "bar" })]
         [InlineData("files/rep.dic", "vinteún", new[] { "vinte e un" })]
-        [InlineData("files/rep.dic", "autos", new[] { "auto's", "auto" })]
+        [InlineData("files/rep.dic", "autos", new[] { "auto's" })]
         [InlineData("files/ngram_utf_fix.dic", "человеко", new[] { "человек" })]
         [InlineData("files/utf8_nonbmp.dic", "𐏑𐏒𐏒", new[] { "𐏑 𐏒𐏒", "𐏒𐏑", "𐏒𐏒" })]
         [InlineData("files/ignoresug.dic", "ինչ", new[] { "ինչ" })]

WeCantSpell.Hunspell.Tests/WordListReaderTests.cs

@@ -845,10 +845,9 @@ public async Task can_read_korean_dic()
 
             var actual = await WordListReader.ReadFileAsync(filePath);
 
-            actual.RootWords.Should().HaveCount(2);
-            actual.RootWords.Should().BeEquivalentTo(new[] {
-                "들어오세요",
-                "안녕하세요" });
+            actual.RootWords.Should().HaveCountGreaterThanOrEqualTo(2);
+            actual.RootWords.Should().Contain("들어오세요");
+            actual.RootWords.Should().Contain("안녕하세요");
         }
 
         [Fact]

WeCantSpell.Hunspell/CandidateStack.cs

@@ -4,6 +4,8 @@ namespace WeCantSpell.Hunspell;
 
 internal sealed class CandidateStack : List<string>
 {
+    internal const int MaxCandidateStackDepth = 2048;
+
     public CandidateStack() : base(1)
     {
         // Preallocate with a small capacity as it doesn't often grow very large
@@ -12,7 +14,7 @@ public CandidateStack() : base(1)
     /// <remarks>
     /// apply a fairly arbitrary depth limit
     /// </remarks>
-    public bool ExceedsArbitraryDepthLimit => Count > 2048;
+    public bool ExceedsArbitraryDepthLimit => Count > MaxCandidateStackDepth;
 
     public void Push(string value)
     {

WeCantSpell.Hunspell/OperationLimiters.cs

@@ -25,6 +25,8 @@ public OperationTimedLimiter(int timeLimitMs, CancellationToken cancellationToke
     private readonly CancellationToken _cancellationToken;
     private bool _hasTriggeredCancellation;
 
+    public bool HasBeenCanceled => _hasTriggeredCancellation || _cancellationToken.IsCancellationRequested;
+
     public bool QueryForCancellation()
     {
         if (!_hasTriggeredCancellation)

WeCantSpell.Hunspell/SpellCheckResultType.cs

@@ -3,7 +3,7 @@
 namespace WeCantSpell.Hunspell;
 
 [Flags]
-public enum SpellCheckResultType : byte
+public enum SpellCheckResultType : ushort
 {
     None = 0,
     /// <summary>
@@ -20,4 +20,8 @@ public enum SpellCheckResultType : byte
     /// Permit only 2 dictionary words in the compound.
     /// </summary>
     Compound2 = 1 << 7,
+    /// <summary>
+    /// limit suggestions for the best ones, i.e. ph:
+    /// </summary>
+    BestSug = 1 << 8,
 }

WeCantSpell.Hunspell/WordList.Query.cs

@@ -460,6 +460,8 @@ words is null
 
         public WordEntry? CompoundCheck(ReadOnlySpan<char> word, int wordNum, int numSyllable, int maxwordnum, IncrementalWordList? words, IncrementalWordList rwords, bool huMovRule, bool isSug, ref SpellCheckResultType info)
         {
+            // add a time limit to handle possible
+            // combinatorical explosion of the overlapping words
             var opLimiter = new OperationTimedLimiter(Options.TimeLimitCompoundCheck, CancellationToken);
             return CompoundCheck(word, wordNum, numSyllable, maxwordnum, words, rwords, huMovRule, isSug, ref info, ref opLimiter);
         }
@@ -479,6 +481,13 @@ words is null
             var oldwords = words;
             var len = word.Length;
 
+            if (wordNum != 0)
+            {
+                // Reduce the number of clock checks by querying for cancellation once per method invocation
+                opLimiter.QueryForCancellation();
+            }
+
+            // setcminmax
             var cmin = Affix.CompoundMin;
             var cmax = word.Length - cmin + 1;
 
@@ -501,7 +510,7 @@ words is null
 
                     do // simplified checkcompoundpattern loop
                     {
-                        if (opLimiter.QueryForCancellation())
+                        if (opLimiter.HasBeenCanceled)
                         {
                             return null;
                         }
@@ -568,10 +577,29 @@ words is null
                             {
                                 if (!huMovRule)
                                 {
+                                    // forbid dictionary stems with COMPOUNDFORBIDFLAG in
+                                    // compound words, overriding the effect of COMPOUNDPERMITFLAG
                                     if (searchEntryDetails[0].ContainsFlag(Affix.CompoundForbidFlag))
                                     {
-                                        // forbid dictionary stems with COMPOUNDFORBIDFLAG in
-                                        // compound words, overriding the effect of COMPOUNDPERMITFLAG
+                                        if (!onlycpdrule && Affix.SimplifiedCompound) // would_continue
+                                        {
+                                            if (scpd == 0)
+                                            {
+                                                // given the while conditions that continue jumps to, this situation never ends
+                                                // TODO: HUNSPELL_WARNING(stderr, "break infinite loop\n");
+                                                break;
+                                            }
+
+                                            if (scpd > 0)
+                                            {
+                                                // under these conditions we loop again, but the assumption above
+                                                // appears to be that cmin and cmax are the original values they
+                                                // had in the outside loop
+                                                cmin = oldcmin;
+                                                cmax = oldcmax;
+                                            }
+                                        }
+
                                         continue;
                                     }
 

WeCantSpell.Hunspell/WordList.QuerySuggest.cs

@@ -669,6 +669,10 @@ internal bool Suggest(List<string> slst, string word, ref bool onlyCompoundSug)
                     if (slst.Count > i)
                     {
                         state.GoodSuggestion = true;
+                        if (state.Info.HasFlag(SpellCheckResultType.BestSug))
+                        {
+                            goto bestSug;
+                        }
                     }
                 }
 
@@ -769,6 +773,11 @@ internal bool Suggest(List<string> slst, string word, ref bool onlyCompoundSug)
                 if (!state.IsCpdSuggest || (!Affix.NoSplitSuggestions && slst.Count < sugLimit))
                 {
                     TwoWords(ref state);
+
+                    if (state.Info.HasFlag(SpellCheckResultType.BestSug))
+                    {
+                        goto bestSug;
+                    }
                 }
 
                 if (opLimiter.QueryForCancellation()) goto timerExit;
@@ -803,6 +812,10 @@ internal bool Suggest(List<string> slst, string word, ref bool onlyCompoundSug)
         timerExit:
             goto actualExit;
 
+        bestSug:
+            state.GoodSuggestion = true;
+            goto actualExit;
+
         actualExit:
             state.DestroyBuffer();
             return state.GoodSuggestion;
@@ -1465,17 +1478,23 @@ private void ReplChars(List<string> wlst, string word, ref SuggestState state)
                     if (replacement[type] is { Length: > 0 } replacementValue)
                     {
                         var candidate = StringEx.ConcatString(word.AsSpan(0, r), replacementValue, word.AsSpan(r + replacement.Pattern.Length));
+                        var sp = candidate.IndexOf(' ');
 
+                        var oldNs = wlst.Count;
                         TestSug(wlst, candidate, ref state);
+                        if (oldNs < wlst.Count)
+                        {
+                            // REP suggestions are the best, don't search other type of suggestions
+                            state.Info |= SpellCheckResultType.BestSug;
+                        }
 
                         // check REP suggestions with space
-                        var sp = candidate.IndexOf(' ');
                         var prev = 0;
                         while (sp >= 0)
                         {
                             if (CheckWord(candidate.AsSpan(prev, sp - prev), cpdSuggest: 0) != 0)
                             {
-                                var oldNs = wlst.Count;
+                                oldNs = wlst.Count;
                                 TestSug(wlst, candidate.AsSpan(sp + 1), ref state);
                                 if (oldNs < wlst.Count)
                                 {
@@ -1512,6 +1531,8 @@ private void NGramSuggest(List<string> wlst, string word, CapitalizationType cap
                 roots[i] = new(i);
             }
 
+            var hasRoots = false;
+            var hasRootsPhon = false;
             var lp = roots.Length - 1;
             var lpphon = lp;
 
@@ -1521,6 +1542,13 @@ private void NGramSuggest(List<string> wlst, string word, CapitalizationType cap
                 word = word.GetReversed();
             }
 
+            // ofz#59067 a replist entry can generate a very long word, abandon
+            // ngram if that odd-edge case arises
+            if (word.Length > MaxWordLen * 4)
+            {
+                return;
+            }
+
             var hasPhoneEntries = Affix.Phone.HasItems;
             var textInfo = TextInfo;
             var target = hasPhoneEntries
@@ -1576,6 +1604,7 @@ private void NGramSuggest(List<string> wlst, string word, CapitalizationType cap
                     {
                         roots[lp].Score = sc;
                         roots[lp].Root = new WordEntry(hpSet.Key, hpDetail);
+                        hasRoots = true;
                         lval = sc;
                         for (var j = 0; j < roots.Length; j++)
                         {
@@ -1591,6 +1620,7 @@ private void NGramSuggest(List<string> wlst, string word, CapitalizationType cap
                     {
                         roots[lpphon].ScorePhone = scphon;
                         roots[lpphon].RootPhon = hpSet.Key;
+                        hasRootsPhon = true;
                         lval = scphon;
                         for (var j = 0; j < roots.Length; j++)
                         {
@@ -1604,6 +1634,12 @@ private void NGramSuggest(List<string> wlst, string word, CapitalizationType cap
                 }
             }
 
+            if (!hasRoots && !hasRootsPhon)
+            {
+                // with no roots there will be no guesses and no point running ngram
+                return;
+            }
+
             // find minimum threshold for a passable suggestion
             // mangle original word three differnt ways
             // and score them to generate a minimum acceptable score
@@ -2283,6 +2319,9 @@ private void TwoWords(ref SuggestState state)
                 candidate[p] = ' ';
                 if (cpdSuggest == 0 && CheckWord(candidate.TerminatedSpan, cpdSuggest) != 0)
                 {
+                    // best solution
+                    state.Info |= SpellCheckResultType.BestSug;
+
                     // remove not word pair suggestions
                     if (!good)
                     {
@@ -2299,6 +2338,9 @@ private void TwoWords(ref SuggestState state)
                     candidate[p] = '-';
                     if (cpdSuggest == 0 && CheckWord(candidate.TerminatedSpan, cpdSuggest) != 0)
                     {
+                        // best solution
+                        state.Info |= SpellCheckResultType.BestSug;
+
                         // remove not word pair suggestions
                         if (!good)
                         {

WeCantSpell.Hunspell/WordList.cs

@@ -13,7 +13,7 @@ public sealed partial class WordList
 {
     internal const int MaxWordLen = 100;
     internal const int MaxWordUtf8Len = MaxWordLen * 3;
-    internal const int RecursiveDepthLimit = 16384;
+    internal const int RecursiveDepthLimit = 0x3F00;
 
     public static WordList CreateFromStreams(Stream dictionaryStream, Stream affixStream) =>
         WordListReader.Read(dictionaryStream, affixStream);

artifacts/bench/results/WeCantSpell.Hunspell.Benchmarks.NHunspell.Suites.CheckEnUsSuite-report-github.md

@@ -11,5 +11,5 @@ MaxWarmupIterationCount=5  MinIterationCount=1  MinWarmupIterationCount=1
 ```
 | Method                     | Mean      | Error     | StdDev    | Min       | Max       | Median    | Ratio |
 |--------------------------- |----------:|----------:|----------:|----------:|----------:|----------:|------:|
-| 'Check words: WeCantSpell' | 18.476 ms | 0.2682 ms | 0.0696 ms | 18.367 ms | 18.554 ms | 18.480 ms |  1.00 |
-| 'Check words: NHunspell'   |  6.097 ms | 0.1177 ms | 0.0420 ms |  6.019 ms |  6.132 ms |  6.111 ms |  0.33 |
+| 'Check words: WeCantSpell' | 18.338 ms | 0.2788 ms | 0.0432 ms | 18.287 ms | 18.392 ms | 18.337 ms |  1.00 |
+| 'Check words: NHunspell'   |  6.060 ms | 0.1201 ms | 0.0794 ms |  5.973 ms |  6.175 ms |  6.049 ms |  0.33 |

artifacts/bench/results/WeCantSpell.Hunspell.Benchmarks.NHunspell.Suites.CheckEnUsSuite-report.csv

@@ -1,3 +1,3 @@
 Method,Job,AnalyzeLaunchVariance,EvaluateOverhead,MaxAbsoluteError,MaxRelativeError,MinInvokeCount,MinIterationTime,OutlierMode,Affinity,EnvironmentVariables,Jit,LargeAddressAware,Platform,PowerPlanMode,Runtime,AllowVeryLargeObjects,Concurrent,CpuGroups,Force,HeapAffinitizeMask,HeapCount,NoAffinitize,RetainVm,Server,Arguments,BuildConfiguration,Clock,EngineFactory,NuGetReferences,Toolchain,IsMutator,InvocationCount,IterationCount,IterationTime,LaunchCount,MaxIterationCount,MaxWarmupIterationCount,MemoryRandomization,MinIterationCount,MinWarmupIterationCount,RunStrategy,UnrollFactor,WarmupCount,Mean,Error,StdDev,Min,Max,Median,Ratio
-'Check words: WeCantSpell',Job-TPWOKF,False,Default,Default,Default,1,Default,Default,1111111111111111,Empty,RyuJit,Default,X64,8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c,.NET Framework 4.8,False,True,False,True,Default,Default,False,False,False,Default,Default,Default,Default,Default,Default,Default,Default,Default,1.0000 s,Default,20,5,Default,1,1,Default,16,Default,18.476 ms,0.2682 ms,0.0696 ms,18.367 ms,18.554 ms,18.480 ms,1.00
-'Check words: NHunspell',Job-TPWOKF,False,Default,Default,Default,1,Default,Default,1111111111111111,Empty,RyuJit,Default,X64,8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c,.NET Framework 4.8,False,True,False,True,Default,Default,False,False,False,Default,Default,Default,Default,Default,Default,Default,Default,Default,1.0000 s,Default,20,5,Default,1,1,Default,16,Default,6.097 ms,0.1177 ms,0.0420 ms,6.019 ms,6.132 ms,6.111 ms,0.33
+'Check words: WeCantSpell',Job-TPWOKF,False,Default,Default,Default,1,Default,Default,1111111111111111,Empty,RyuJit,Default,X64,8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c,.NET Framework 4.8,False,True,False,True,Default,Default,False,False,False,Default,Default,Default,Default,Default,Default,Default,Default,Default,1.0000 s,Default,20,5,Default,1,1,Default,16,Default,18.338 ms,0.2788 ms,0.0432 ms,18.287 ms,18.392 ms,18.337 ms,1.00
+'Check words: NHunspell',Job-TPWOKF,False,Default,Default,Default,1,Default,Default,1111111111111111,Empty,RyuJit,Default,X64,8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c,.NET Framework 4.8,False,True,False,True,Default,Default,False,False,False,Default,Default,Default,Default,Default,Default,Default,Default,Default,1.0000 s,Default,20,5,Default,1,1,Default,16,Default,6.060 ms,0.1201 ms,0.0794 ms,5.973 ms,6.175 ms,6.049 ms,0.33

artifacts/bench/results/WeCantSpell.Hunspell.Benchmarks.NHunspell.Suites.CheckEnUsSuite-report.html

@@ -2,7 +2,7 @@
 <html lang='en'>
 <head>
 <meta charset='utf-8' />
-<title>WeCantSpell.Hunspell.Benchmarks.NHunspell.Suites.CheckEnUsSuite-20231123-110714</title>
+<title>WeCantSpell.Hunspell.Benchmarks.NHunspell.Suites.CheckEnUsSuite-20231123-122835</title>
 
 <style type="text/css">
 	table { border-collapse: collapse; display: block; width: 100%; overflow: auto; }
@@ -25,8 +25,8 @@
 <table>
 <thead><tr><th>Method              </th><th>Mean</th><th>Error</th><th>StdDev</th><th>Min</th><th>Max</th><th>Median</th><th>Ratio</th>
 </tr>
-</thead><tbody><tr><td>&#39;Check words: WeCantSpell&#39;</td><td>18.476 ms</td><td>0.2682 ms</td><td>0.0696 ms</td><td>18.367 ms</td><td>18.554 ms</td><td>18.480 ms</td><td>1.00</td>
-</tr><tr><td>&#39;Check words: NHunspell&#39;</td><td>6.097 ms</td><td>0.1177 ms</td><td>0.0420 ms</td><td>6.019 ms</td><td>6.132 ms</td><td>6.111 ms</td><td>0.33</td>
+</thead><tbody><tr><td>&#39;Check words: WeCantSpell&#39;</td><td>18.338 ms</td><td>0.2788 ms</td><td>0.0432 ms</td><td>18.287 ms</td><td>18.392 ms</td><td>18.337 ms</td><td>1.00</td>
+</tr><tr><td>&#39;Check words: NHunspell&#39;</td><td>6.060 ms</td><td>0.1201 ms</td><td>0.0794 ms</td><td>5.973 ms</td><td>6.175 ms</td><td>6.049 ms</td><td>0.33</td>
 </tr></tbody></table>
 </body>
 </html>

artifacts/bench/results/WeCantSpell.Hunspell.Benchmarks.NHunspell.Suites.SuggestEnUsSuite-report-github.md

@@ -11,5 +11,5 @@ MaxWarmupIterationCount=5  MinIterationCount=1  MinWarmupIterationCount=1
 ```
 | Method                       | Mean       | Error    | StdDev   | Min        | Max        | Median     | Ratio | RatioSD |
 |----------------------------- |-----------:|---------:|---------:|-----------:|-----------:|-----------:|------:|--------:|
-| 'Suggest words: WeCantSpell' |   751.7 ms |  9.60 ms |  1.49 ms |   750.2 ms |   753.5 ms |   751.5 ms |  1.00 |    0.00 |
-| 'Suggest words: NHunspell'   | 1,896.1 ms | 34.36 ms | 15.25 ms | 1,875.9 ms | 1,908.8 ms | 1,905.4 ms |  2.52 |    0.02 |
+| 'Suggest words: WeCantSpell' |   759.0 ms |  7.36 ms |  1.14 ms |   758.1 ms |   760.7 ms |   758.7 ms |  1.00 |    0.00 |
+| 'Suggest words: NHunspell'   | 1,895.0 ms | 32.72 ms | 17.11 ms | 1,873.2 ms | 1,911.9 ms | 1,899.5 ms |  2.50 |    0.02 |

artifacts/bench/results/WeCantSpell.Hunspell.Benchmarks.NHunspell.Suites.SuggestEnUsSuite-report.csv

@@ -1,3 +1,3 @@
 Method,Job,AnalyzeLaunchVariance,EvaluateOverhead,MaxAbsoluteError,MaxRelativeError,MinInvokeCount,MinIterationTime,OutlierMode,Affinity,EnvironmentVariables,Jit,LargeAddressAware,Platform,PowerPlanMode,Runtime,AllowVeryLargeObjects,Concurrent,CpuGroups,Force,HeapAffinitizeMask,HeapCount,NoAffinitize,RetainVm,Server,Arguments,BuildConfiguration,Clock,EngineFactory,NuGetReferences,Toolchain,IsMutator,InvocationCount,IterationCount,IterationTime,LaunchCount,MaxIterationCount,MaxWarmupIterationCount,MemoryRandomization,MinIterationCount,MinWarmupIterationCount,RunStrategy,UnrollFactor,WarmupCount,Mean,Error,StdDev,Min,Max,Median,Ratio,RatioSD
-'Suggest words: WeCantSpell',Job-TPWOKF,False,Default,Default,Default,1,Default,Default,1111111111111111,Empty,RyuJit,Default,X64,8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c,.NET Framework 4.8,False,True,False,True,Default,Default,False,False,False,Default,Default,Default,Default,Default,Default,Default,Default,Default,1.0000 s,Default,20,5,Default,1,1,Default,16,Default,751.7 ms,9.60 ms,1.49 ms,750.2 ms,753.5 ms,751.5 ms,1.00,0.00
-'Suggest words: NHunspell',Job-TPWOKF,False,Default,Default,Default,1,Default,Default,1111111111111111,Empty,RyuJit,Default,X64,8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c,.NET Framework 4.8,False,True,False,True,Default,Default,False,False,False,Default,Default,Default,Default,Default,Default,Default,Default,Default,1.0000 s,Default,20,5,Default,1,1,Default,16,Default,"1,896.1 ms",34.36 ms,15.25 ms,"1,875.9 ms","1,908.8 ms","1,905.4 ms",2.52,0.02
+'Suggest words: WeCantSpell',Job-TPWOKF,False,Default,Default,Default,1,Default,Default,1111111111111111,Empty,RyuJit,Default,X64,8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c,.NET Framework 4.8,False,True,False,True,Default,Default,False,False,False,Default,Default,Default,Default,Default,Default,Default,Default,Default,1.0000 s,Default,20,5,Default,1,1,Default,16,Default,759.0 ms,7.36 ms,1.14 ms,758.1 ms,760.7 ms,758.7 ms,1.00,0.00
+'Suggest words: NHunspell',Job-TPWOKF,False,Default,Default,Default,1,Default,Default,1111111111111111,Empty,RyuJit,Default,X64,8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c,.NET Framework 4.8,False,True,False,True,Default,Default,False,False,False,Default,Default,Default,Default,Default,Default,Default,Default,Default,1.0000 s,Default,20,5,Default,1,1,Default,16,Default,"1,895.0 ms",32.72 ms,17.11 ms,"1,873.2 ms","1,911.9 ms","1,899.5 ms",2.50,0.02