text: // Copyright 2014 PDFium 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 "testing/fx_string_testhelpers.h"
  
  #include <iomanip>
  #include <ios>
  
  namespace {
  
  template <typename T>
  std::ostream& output_string(std::ostream& out, const T& str) {
    out << std::hex << std::setfill('0') << '"';
    // This function is used for FX strings whose length is defined as int.
    for (int i = 0; i < str.GetLength(); ++i) {
      unsigned int c = str.GetAt(i);
      if (c >= 0x20 && c < 0x7F) {
        out << static_cast<char>(c);
      } else if (sizeof(typename T::CharType) == 1) {
        out << "\\x" << std::setw(2) << c << std::setw(0);
      } else if (c < 0x10000) {
        out << "\\u" << std::setw(4) << c << std::setw(0);
      } else {
        out << "<invalid>";
      }
    }
    out << '"' << std::dec << std::setfill(' ');
    return out;
  }
  
  }  // namespace
  
  std::ostream& operator<<(std::ostream& out, const CFX_ByteStringC& str) {
    return output_string(out, str);
  }
  
  std::ostream& operator<<(std::ostream& out, const CFX_ByteString& str) {
    return output_string(out, str);
  }
  
  std::ostream& operator<<(std::ostream& out, const CFX_WideStringC& str) {
    return output_string(out, str);
  }
  
  std::ostream& operator<<(std::ostream& out, const CFX_WideString& str) {
    return output_string(out, str);
  }
  