FileSystem.cpp

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// Copyright (c) 2026 Computer Vision Center (CVC) at the Universitat Autonoma
// de Barcelona (UAB).
//
// This work is licensed under the terms of the MIT license.
// For a copy, see <https://opensource.org/licenses/MIT>.
 
#include "carla/FileSystem.h"
 
#include "carla/Exception.h"
#include "carla/StringUtil.h"
 
#include <filesystem>
 
namespace carla {
 
  namespace fs = std::filesystem;
 
  void FileSystem::ValidateFilePath(std::string &filepath, const std::string &ext) {
    fs::path path(filepath);
    if (!ext.empty() && path.extension() != ext)
      path.replace_extension(ext);
    auto parent = fs::absolute(path.parent_path());
    if (!fs::exists(parent))
      fs::create_directories(parent);
    filepath = path.string();
  }
 
  std::vector<std::string> FileSystem::ListFolder(
      const std::string &folder_path,
      const std::string &wildcard_pattern) {
    fs::path root(folder_path);
    if (!fs::exists(root) || !fs::is_directory(root)) {
      throw_exception(std::invalid_argument(folder_path + ": no such folder"));
    }
 
    std::vector<std::string> results;
    fs::directory_iterator end;
    for (fs::directory_iterator it(root); it != end; ++it) {
      if (fs::is_regular_file(*it)) {
        const std::string filename = it->path().filename().string();
        if (StringUtil::Match(filename, wildcard_pattern)) {
          results.emplace_back(filename);
        }
      }
    }
    return results;
  }
 
} // namespace carla