зеркало из https://github.com/mozilla/gecko-dev.git
78 строки
2.4 KiB
C++
78 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MediaResult_h_
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#define MediaResult_h_
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#include "nsString.h" // Required before 'mozilla/ErrorNames.h'!?
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#include "mozilla/ErrorNames.h"
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#include "nsError.h"
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#include "nsPrintfCString.h"
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// MediaResult can be used interchangeably with nsresult.
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// It allows to store extra information such as where the error occurred.
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// While nsresult is typically passed by value; due to its potential size, using
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// MediaResult const references is recommended.
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namespace mozilla {
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class MediaResult
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{
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public:
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MOZ_IMPLICIT MediaResult(nsresult aResult)
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: mCode(aResult)
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{
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}
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MediaResult(nsresult aResult, const nsACString& aMessage)
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: mCode(aResult)
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, mMessage(aMessage)
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{
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}
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MediaResult(nsresult aResult, const char* aMessage)
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: mCode(aResult)
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, mMessage(aMessage)
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{
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}
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MediaResult(const MediaResult& aOther) = default;
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MediaResult(MediaResult&& aOther) = default;
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MediaResult& operator=(const MediaResult& aOther) = default;
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MediaResult& operator=(MediaResult&& aOther) = default;
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nsresult Code() const { return mCode; }
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const nsCString& Message() const { return mMessage; }
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// Interoperations with nsresult.
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bool operator==(nsresult aResult) const { return aResult == mCode; }
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bool operator!=(nsresult aResult) const { return aResult != mCode; }
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operator nsresult () const { return mCode; }
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nsCString Description() const
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{
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if (NS_SUCCEEDED(mCode)) {
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return nsCString();
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}
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nsCString name;
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GetErrorName(mCode, static_cast<nsACString&>(name));
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return nsPrintfCString("%s (0x%08" PRIx32 ")%s%s",
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name.get(),
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static_cast<uint32_t>(mCode),
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mMessage.IsEmpty() ? "" : " - ",
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mMessage.get());
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}
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private:
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nsresult mCode;
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nsCString mMessage;
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};
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#ifdef _MSC_VER
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#define RESULT_DETAIL(arg, ...) nsPrintfCString("%s: " arg, __FUNCSIG__, ##__VA_ARGS__)
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#else
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#define RESULT_DETAIL(arg, ...) nsPrintfCString("%s: " arg, __PRETTY_FUNCTION__, ##__VA_ARGS__)
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#endif
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} // namespace mozilla
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#endif // MediaResult_h_
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