YugabyteDB (2.13.0.0-b42, bfc6a6643e7399ac8a0e81d06a3ee6d6571b33ab)

// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// 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

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

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// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

//

// The following only applies to changes made to this file as part of YugaByte development.

//

// Portions Copyright (c) YugaByte, Inc.

//

// Licensed 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

//

// Unless required by applicable law or agreed to in writing, software distributed under the License

// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express

// or implied.  See the License for the specific language governing permissions and limitations

// under the License.

//

#include "yb/util/hexdump.h"

#include <string>

#include "yb/gutil/stringprintf.h"

#include "yb/util/slice.h"

namespace yb {

std::string HexDump(const Slice &slice) {

  std::string output;

  output.reserve(slice.size() * 5);

  const uint8_t *p = slice.data();

  auto rem = slice.size();

  while (rem > 0) {

    const uint8_t *line_p = p;

    auto line_len = std::min<decltype(rem)>(rem, 16);

    auto line_rem = line_len;

    StringAppendF(&output, "%06lx: ", line_p - slice.data());

    while (line_rem >= 2) {

      StringAppendF(&output, "%02x%02x ",

                    p[0] & 0xff, p[1] & 0xff);

      p += 2;

      line_rem -= 2;

    }

    if (line_rem == 1) {

      StringAppendF(&output, "%02x   ",

                    p[0] & 0xff);

      p += 1;

      line_rem -= 1;

    }

    auto padding = (16 - line_len) / 2;

    for (size_t i = 0; i < padding; i++) {

      output.append("     ");

    }

    for (size_t i = 0; i < line_len; i++) {

      char c = line_p[i];

      if (isprint(c)) {

        output.push_back(c);

      } else {

        output.push_back('.');

      }

    }

    output.push_back('\n');

    rem -= line_len;

  }

  return output;

}

} // namespace yb