Import RegExp classes from Ham.

Minor adjustments made by myself to fit into Haiku better.

headers/private/shared/RegExp.h

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2013, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef REG_EXP_H
+#define REG_EXP_H
+
+
+#include <stddef.h>
+
+
+class RegExp {
+public:
+			enum PatternType {
+				PATTERN_TYPE_REGULAR_EXPRESSION,
+				PATTERN_TYPE_WILDCARD
+			};
+
+			class MatchResult;
+
+public:
+								RegExp();
+								RegExp(const char* pattern,
+									PatternType patternType
+										= PATTERN_TYPE_REGULAR_EXPRESSION);
+								RegExp(const RegExp& other);
+								~RegExp();
+
+			bool				IsValid() const
+									{ return fData != NULL; }
+
+			bool				SetPattern(const char* pattern,
+									PatternType patternType
+										= PATTERN_TYPE_REGULAR_EXPRESSION);
+
+			MatchResult			Match(const char* string) const;
+
+			RegExp&				operator=(const RegExp& other);
+
+private:
+			struct Data;
+			struct MatchResultData;
+
+private:
+			Data*				fData;
+};
+
+
+class RegExp::MatchResult {
+public:
+								MatchResult();
+								MatchResult(const MatchResult& other);
+								~MatchResult();
+
+			bool				HasMatched() const;
+
+			size_t				StartOffset() const;
+			size_t				EndOffset() const;
+
+			size_t				GroupCount() const;
+			size_t				GroupStartOffsetAt(size_t index) const;
+			size_t				GroupEndOffsetAt(size_t index) const;
+
+			MatchResult&		operator=(const MatchResult& other);
+
+private:
+			friend class RegExp;
+
+private:
+								MatchResult(MatchResultData* data);
+									// takes over the data reference
+
+private:
+			MatchResultData*	fData;
+};
+
+
+#endif	// REG_EXP_H