text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "base/base64.h"
  
  #include <stddef.h>
  
  #if 0
  #include "third_party/modp_b64/modp_b64.h"
  
  namespace base {
  
  std::string Base64Encode(span<const uint8_t> input) {
    std::string output;
    output.resize(modp_b64_encode_len(input.size()));  // makes room for null byte
  
    // modp_b64_encode_len() returns at least 1, so output[0] is safe to use.
    const size_t output_size = modp_b64_encode(
        &(output[0]), reinterpret_cast<const char*>(input.data()), input.size());
  
    output.resize(output_size);
    return output;
  }
  
  void Base64Encode(const StringPiece& input, std::string* output) {
    *output = Base64Encode(base::as_bytes(base::make_span(input)));
  }
  
  bool Base64Decode(const StringPiece& input, std::string* output) {
    std::string temp;
    temp.resize(modp_b64_decode_len(input.size()));
  
    // does not null terminate result since result is binary data!
    size_t input_size = input.size();
    size_t output_size = modp_b64_decode(&(temp[0]), input.data(), input_size);
    if (output_size == MODP_B64_ERROR)
      return false;
  
    temp.resize(output_size);
    output->swap(temp);
    return true;
  }
  
  }  // namespace base
  #endif