cpp/src/gandiva/regex_util.h

// Licensed to the Apache Software Foundation (ASF) under one
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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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// software distributed under the License is distributed on an
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#pragma once

#include <set>
#include <sstream>
#include <string>

#include "gandiva/arrow.h"
#include "gandiva/visibility.h"

namespace gandiva {

/// \brief Utility class for converting sql patterns to pcre patterns.
class RegexUtil {
 public:
  // Convert an sql pattern to a pcre pattern
  static GANDIVA_EXPORT arrow::Result<std::string> SqlLikePatternToPcre(
      const std::string& like_pattern, char escape_char);

  static arrow::Result<std::string> SqlLikePatternToPcre(
      const std::string& like_pattern) {
    return SqlLikePatternToPcre(like_pattern, '\0' /*escape_char*/);
  }

 private:
  static const std::set<char> pcre_regex_specials_;
};

}  // namespace gandiva