scanning min scan length

2026-07-08 18:25:05 +08:00
parent 439128798e
commit 29b24191e1
8 changed files with 125 additions and 93 deletions
@@ -26,7 +26,9 @@ namespace StgSharp.RegularAnalysis.Text
                 AbstractSyntaxTree<RegexAstNode, RegexElementLabel> ast,
                 List<RegexIR> base_ir,
                 List<RegexIR> ir,
+                 RegexInfo info,
                 Exception? analyseException = null
+
        )
        {
            Pattern = pattern;
@@ -34,6 +36,7 @@ namespace StgSharp.RegularAnalysis.Text
            IRs = ir;
            BaseIR = base_ir;
            AnalyseException = analyseException;
+            Info = info;
        }

        public Exception? AnalyseException { get; set; }
@@ -46,6 +49,8 @@ namespace StgSharp.RegularAnalysis.Text

        internal List<RegexIR> IRs { get; }

+        internal RegexInfo Info { get; }
+
    }

    public static partial class RegexAnalyzer
@@ -55,10 +60,11 @@ namespace StgSharp.RegularAnalysis.Text
                                      string regex
        )
        {
-#pragma warning disable CA1031 
+#pragma warning disable CA1031
            // RegexAnalyzer interpreter = new();
            // interpreter._source = regex;
            AbstractSyntaxTree<RegexAstNode, RegexElementLabel> tree;
+            RegexInfo info = new();
            try
            {
                tree = GenerateAST(regex);
@@ -66,29 +72,40 @@ namespace StgSharp.RegularAnalysis.Text
            }
            catch (Exception ex)
            {
-                return new TextRegexSource(regex, null, null, null, ex);
+                return new TextRegexSource(regex, null, null, null, info, ex);
            }
            List<RegexIR> base_ir;
            try
            {
-                base_ir = GenerateIR(tree);
+                base_ir = GenerateIR(tree, ref info);
            }
            catch (Exception ex)
            {
-                return new TextRegexSource(regex, tree, null, null, ex);
+                return new TextRegexSource(regex, tree, null, null, info, ex);
            }
            try
            {
                ScanAndOptimizeIR(base_ir, out List<RegexIR> opt_ir);
                List<RegexIR> prefix_ir = EmitPrefix(opt_ir);
-                return new TextRegexSource(regex, tree, base_ir, prefix_ir);
+                return new TextRegexSource(regex, tree, base_ir, prefix_ir, info);
            }
            catch (Exception ex)
            {
-                return new TextRegexSource(regex, tree, base_ir, null, ex);
+                return new TextRegexSource(regex, tree, base_ir, null, info, ex);
            }
 #pragma warning restore CA1031 
        }

    }
+
+    internal struct RegexInfo
+    {
+
+        public int RegionCount { get; set; }
+
+        public int MinPredictLength { get; set; }
+
+        public int SingleLineResultCount { get; set; }
+
+    }
 }