strings.hpp

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// Copyright (c) Microsoft Corporation. All rights reserved.
// SPDX-License-Identifier: MIT
 
#pragma once
 
#include <algorithm>
#include <string>
 
namespace Azure { namespace Core { namespace _internal {
 
  struct StringExtensions final
  {
    struct CaseInsensitiveComparator final
    {
      bool operator()(const std::string& lhs, const std::string& rhs) const
      {
        return std::lexicographical_compare(
            lhs.begin(), lhs.end(), rhs.begin(), rhs.end(), [](char c1, char c2) {
              return ToLower(c1) < ToLower(c2);
            });
      }
    };
 
    static bool LocaleInvariantCaseInsensitiveEqual(
        const std::string& lhs,
        const std::string& rhs) noexcept;
    static std::string const ToLower(std::string const& src) noexcept;
    static unsigned char ToLower(unsigned char const src) noexcept;
    static std::string const ToUpper(std::string const& src) noexcept;
    static unsigned char ToUpper(unsigned char const src) noexcept;
  };
 
}}} // namespace Azure::Core::_internal