// Copyright 2021 Google LLC
//
// 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
//
//     https://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 "sharing/internal/base/encode.h"

#include <stdint.h>

#include <iomanip>
#include <ios>
#include <sstream>
#include <string>

#include "absl/types/span.h"

namespace nearby {
namespace utils {

// Returns uppercase string.
std::string HexEncode(absl::Span<const uint8_t> data) {
  std::ostringstream stream;
  stream << std::hex << std::setfill('0') << std::uppercase;

  for (uint8_t val : data) {
    stream << std::setw(2) << static_cast<int>(val);
  }

  return stream.str();
}

}  // namespace utils
}  // namespace nearby