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StringifyUtils.h


products/Sources/formale Sprachen/C/Firefox/dom/quota/StringifyUtils.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this file, * You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef mozilla_dom_quota_stringifyutils_h__ #define mozilla_dom_quota_stringifyutils_h__ #include "mozilla/ThreadLocal.h" #include "nsTHashSet.h" #include "nsLiteralString.h" namespace mozilla { // Use these constants for common delimiters. Note that `Stringify` already // encloses each call to `DoStringify` with `kStringify[Start/End]Instance`. constexpr auto kStringifyDelimiter = "|"_ns; constexpr auto kStringifyStartSet = "["_ns; constexpr auto kStringifyEndSet = "]"_ns; constexpr auto kStringifyStartInstance = "{"_ns; constexpr auto kStringifyEndInstance = "}"_ns; // A Stringifyable class provides a method `Stringify` that returns a string // representation of the class content. // // It's content is just appended by the override of `DoStringify` but // `Stringifyable` ensures that we won't call `DoStringify` twice for the same // call and instance. A single `DoStringify` function thus needs not to be // aware of "should I `Stringify` the content of this member or not", it can // just do it always. // // Stringifyable does not bloat the object by additional members but uses // thread local memory only when needed. class Stringifyable { public: void Stringify(nsACString& aData); static void InitTLS(); private: virtual void DoStringify(nsACString& aData) = 0; bool IsActive(); void SetActive(bool aIsActive); static MOZ_THREAD_LOCAL(nsTHashSet*) sActiveStringifyableInstances; }; } // namespace mozilla #endif // mozilla_dom_quota_stringifyutils_h__

                                                                                                                                                                                                                                                                                                                                                                                                     


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