text: /*
   * Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
   *
   * SPDX-License-Identifier: BSD-2-Clause
   */
  
  #include <Kernel/KString.h>
  
  extern bool g_in_early_boot;
  
  namespace Kernel {
  
  ErrorOr<NonnullOwnPtr<KString>> KString::try_create(StringView string)
  {
      char* characters = nullptr;
      size_t length = string.length();
      auto new_string = TRY(KString::try_create_uninitialized(length, characters));
      if (!string.is_empty())
          __builtin_memcpy(characters, string.characters_without_null_termination(), length);
      characters[length] = '\0';
      return new_string;
  }
  
  NonnullOwnPtr<KString> KString::must_create(StringView string)
  {
      // We can only enforce success during early boot.
      VERIFY(g_in_early_boot);
      return KString::try_create(string).release_value();
  }
  
  ErrorOr<NonnullOwnPtr<KString>> KString::try_create_uninitialized(size_t length, char*& characters)
  {
      size_t allocation_size = sizeof(KString) + (sizeof(char) * length) + sizeof(char);
      auto* slot = kmalloc(allocation_size);
      if (!slot)
          return ENOMEM;
      auto new_string = TRY(adopt_nonnull_own_or_enomem(new (slot) KString(length)));
      characters = new_string->m_characters;
      return new_string;
  }
  
  NonnullOwnPtr<KString> KString::must_create_uninitialized(size_t length, char*& characters)
  {
      // We can only enforce success during early boot.
      VERIFY(g_in_early_boot);
      return KString::try_create_uninitialized(length, characters).release_value();
  }
  
  ErrorOr<NonnullOwnPtr<KString>> KString::try_clone() const
  {
      return try_create(view());
  }
  
  void KString::operator delete(void* string)
  {
      if (!string)
          return;
      size_t allocation_size = sizeof(KString) + (sizeof(char) * static_cast<KString*>(string)->m_length) + sizeof(char);
      kfree_sized(string, allocation_size);
  }
  
  }
  