зеркало из https://github.com/mozilla/gecko-dev.git
91 строка
2.4 KiB
C++
91 строка
2.4 KiB
C++
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#include "nsCOMPtr.h"
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#include "nsIInputStream.h"
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#include "nsIStringStream.h"
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#include "nsAutoPtr.h"
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#include "StartupCacheUtils.h"
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#include "mozilla/scache/StartupCache.h"
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namespace mozilla {
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namespace scache {
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NS_EXPORT nsresult
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NS_NewObjectInputStreamFromBuffer(char* buffer, PRUint32 len,
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nsIObjectInputStream** stream)
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{
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nsCOMPtr<nsIStringInputStream> stringStream
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= do_CreateInstance("@mozilla.org/io/string-input-stream;1");
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nsCOMPtr<nsIObjectInputStream> objectInput
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= do_CreateInstance("@mozilla.org/binaryinputstream;1");
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stringStream->AdoptData(buffer, len);
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objectInput->SetInputStream(stringStream);
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objectInput.forget(stream);
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return NS_OK;
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}
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NS_EXPORT nsresult
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NS_NewObjectOutputWrappedStorageStream(nsIObjectOutputStream **wrapperStream,
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nsIStorageStream** stream)
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{
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nsresult rv;
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nsCOMPtr<nsIStorageStream> storageStream
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= do_CreateInstance("@mozilla.org/storagestream;1");
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rv = storageStream->Init(256, PR_UINT32_MAX, nsnull);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIObjectOutputStream> objectOutput
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= do_CreateInstance("@mozilla.org/binaryoutputstream;1");
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nsCOMPtr<nsIOutputStream> outputStream
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= do_QueryInterface(storageStream);
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objectOutput->SetOutputStream(outputStream);
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#ifdef DEBUG
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// Wrap in debug stream to detect unsupported writes of
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// multiply-referenced non-singleton objects
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StartupCache* sc = StartupCache::GetSingleton();
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NS_ENSURE_TRUE(sc, NS_ERROR_UNEXPECTED);
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nsCOMPtr<nsIObjectOutputStream> debugStream;
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sc->GetDebugObjectOutputStream(objectOutput, getter_AddRefs(debugStream));
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debugStream.forget(wrapperStream);
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#else
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objectOutput.forget(wrapperStream);
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#endif
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storageStream.forget(stream);
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return NS_OK;
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}
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NS_EXPORT nsresult
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NS_NewBufferFromStorageStream(nsIStorageStream *storageStream,
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char** buffer, PRUint32* len)
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{
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nsresult rv;
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nsCOMPtr<nsIInputStream> inputStream;
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rv = storageStream->NewInputStream(0, getter_AddRefs(inputStream));
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NS_ENSURE_SUCCESS(rv, rv);
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PRUint32 avail, read;
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rv = inputStream->Available(&avail);
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NS_ENSURE_SUCCESS(rv, rv);
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nsAutoArrayPtr<char> temp (new char[avail]);
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rv = inputStream->Read(temp, avail, &read);
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if (NS_SUCCEEDED(rv) && avail != read)
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rv = NS_ERROR_UNEXPECTED;
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if (NS_FAILED(rv)) {
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return rv;
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}
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*len = avail;
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*buffer = temp.forget();
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return NS_OK;
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}
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}
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}
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