Function GetUniquePathNumber

src/butil/file_util.cc:249–267

}

int GetUniquePathNumber(const FilePath& path,
                        const FilePath::StringType& suffix) {
  bool have_suffix = !suffix.empty();
  if (!PathExists(path) &&
      (!have_suffix || !PathExists(FilePath(path.value() + suffix)))) {
    return 0;
  }

  FilePath new_path;
  for (int count = 1; count <= kMaxUniqueFiles; ++count) {
    new_path = path.InsertBeforeExtensionASCII(StringPrintf(" (%d)", count));
    if (!PathExists(new_path) &&
        (!have_suffix || !PathExists(FilePath(new_path.value() + suffix)))) {
      return count;
    }
  }

  return -1;
}

}  // namespace butil