utility.cpp

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/*
 * This file is part of the µOS++ project (https://micro-os-plus.github.io/).
 * Copyright (c) 2021-2026 Liviu Ionescu. All rights reserved.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose is hereby granted, under the terms of the MIT license.
 *
 * If a copy of the license was not distributed with this file, it can be
 * obtained from https://opensource.org/licenses/mit.
 *
 * Major parts of the code are inspired from v1.1.8 of the Boost UT project,
 * released under the terms of the Boost Version 1.0 Software License,
 * which can be obtained from https://www.boost.org/LICENSE_1_0.txt.
 */
 
// ----------------------------------------------------------------------------

 
// ----------------------------------------------------------------------------
 
#include "micro-os-plus/micro-test-plus/utility.h"
 
// ----------------------------------------------------------------------------
 
#if defined(__GNUC__)
#pragma GCC diagnostic ignored "-Waggregate-return"
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wc++98-compat"
#endif // defined(__clang__)
#endif // defined(__GNUC__)
 
// ============================================================================
 
#if defined(MICRO_OS_PLUS_MICRO_TEST_PLUS_ENABLED)
 
// ----------------------------------------------------------------------------
 
namespace micro_os_plus::micro_test_plus
{
  // --------------------------------------------------------------------------
 
  namespace utility
  {
#if defined(__GNUC__)
#pragma GCC diagnostic push
 
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wdocumentation"
#endif // defined(__clang__)
#endif // defined(__GNUC__)

    [[nodiscard]] const char*
    extract_file_name (const char* path) noexcept
    {
      if (path == nullptr)
        {
          return ""; // No path, return an empty string.
        }
 
      const std::string_view sv{ path };
      const auto pos = sv.find_last_of ("/\\");
      if (pos == std::string_view::npos)
        {
          return path; // No separators found, return original string.
        }
      return sv.substr (pos + 1).data ();
    }
 
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif // defined(__GNUC__)

    [[nodiscard]] bool
    is_match (std::string_view input, std::string_view pattern)
    {
      constexpr auto npos = std::string_view::npos;
 
      std::size_t i = 0; // Index in the input.
      std::size_t p = 0; // Index in the pattern.
 
      // The position of the most recent `*` in the pattern, and the input
      // index where its match ends.
      std::size_t star_p = npos;
      std::size_t star_i = 0;
 
      while (i < input.size ())
        {
          if (p < pattern.size ()
              && (pattern[p] == '?' || pattern[p] == input[i]))
            {
              ++i;
              ++p;
            }
          else if (p < pattern.size () && pattern[p] == '*')
            {
              // Start by matching an empty sequence.
              star_p = p++;
              star_i = i;
            }
          else if (star_p != npos)
            {
              // Extend the match of the most recent `*` by one character.
              p = star_p + 1;
              i = ++star_i;
            }
          else
            {
              return false;
            }
        }
 
      // The input is exhausted; the rest of the pattern must be only `*`.
      while (p < pattern.size () && pattern[p] == '*')
        {
          ++p;
        }
 
      return p == pattern.size ();
    }

    [[nodiscard]] std::vector<std::string_view>
    split (std::string_view input, std::string_view delimiters)
    {
      std::vector<std::string_view> output{};
      std::size_t first{};
      while (first < input.size ())
        {
          const auto second = input.find_first_of (delimiters, first);
          if (first != second)
            {
              output.emplace_back (input.substr (first, second - first));
            }
          if (second == std::string_view::npos)
            {
              break;
            }
          first = second + 1;
        }
      return output;
    }
 
  } // namespace utility
  // --------------------------------------------------------------------------
} // namespace micro_os_plus::micro_test_plus
 
// ----------------------------------------------------------------------------
 
#endif // defined(MICRO_OS_PLUS_MICRO_TEST_PLUS_ENABLED)
 
// ----------------------------------------------------------------------------