binpac: Initial import of Bro's binpac subdirectory from SVN r7088.

tools/binpac/lib/binpac_regex.h

@@ -0,0 +1,43 @@
+#ifndef binpac_regex_h
+#define binpac_regex_h
+
+#include "binpac.h"
+#include "RE.h"
+
+class RE_Matcher;
+
+namespace binpac
+{
+
+class RegExMatcher {
+public:
+	RegExMatcher(const char *pattern)
+		: pattern_(pattern)
+		{
+		re_matcher_ = 0;
+		}
+
+	~RegExMatcher()
+		{
+		delete re_matcher_;
+		}
+
+	// Returns the length of longest match, or -1 on mismatch.
+	int MatchPrefix(const_byteptr data, int len)
+		{
+		if ( ! re_matcher_ )
+			{
+			re_matcher_ = new RE_Matcher(pattern_.c_str());
+			re_matcher_->Compile();
+			}
+		return re_matcher_->MatchPrefix(data, len);
+		}
+
+private:
+	string pattern_;
+	RE_Matcher *re_matcher_;
+};
+
+}  // namespace binpac
+
+#endif  // binpac_regex_h