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author | Steve Block <steveblock@google.com> | 2011-05-06 11:45:16 +0100 |
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committer | Steve Block <steveblock@google.com> | 2011-05-12 13:44:10 +0100 |
commit | cad810f21b803229eb11403f9209855525a25d57 (patch) | |
tree | 29a6fd0279be608e0fe9ffe9841f722f0f4e4269 /Source/WebCore/platform/FileStream.h | |
parent | 121b0cf4517156d0ac5111caf9830c51b69bae8f (diff) | |
download | external_webkit-cad810f21b803229eb11403f9209855525a25d57.zip external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.gz external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.bz2 |
Merge WebKit at r75315: Initial merge by git.
Change-Id: I570314b346ce101c935ed22a626b48c2af266b84
Diffstat (limited to 'Source/WebCore/platform/FileStream.h')
-rw-r--r-- | Source/WebCore/platform/FileStream.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/Source/WebCore/platform/FileStream.h b/Source/WebCore/platform/FileStream.h new file mode 100644 index 0000000..c369eb0 --- /dev/null +++ b/Source/WebCore/platform/FileStream.h @@ -0,0 +1,100 @@ +/* + * Copyright (C) 2010 Google Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef FileStream_h +#define FileStream_h + +#if ENABLE(BLOB) || ENABLE(FILE_SYSTEM) + +#include "FileSystem.h" +#include <wtf/Forward.h> +#include <wtf/PassRefPtr.h> +#include <wtf/RefCounted.h> + +namespace WebCore { + +class KURL; + +// All methods are synchronous. +class FileStream : public RefCounted<FileStream> { +public: + static PassRefPtr<FileStream> create() + { + return adoptRef(new FileStream()); + } + ~FileStream(); + + // FIXME: To be removed when we switch to using BlobData. + void start(); + + // Aborts the operation. + void stop(); + + // Gets the size of a file. Also validates if the file has been changed or not if the expected modification time is provided, i.e. non-zero. + // Returns total number of bytes if successful. -1 otherwise. + long long getSize(const String& path, double expectedModificationTime); + + // Opens a file for reading. The reading starts at the specified offset and lasts till the specified length. + // Returns true on success. False otherwise. + bool openForRead(const String& path, long long offset, long long length); + + // Opens a file for writing. + // Returns true on success. False otherwise. + bool openForWrite(const String& path); + + // Closes the file. + void close(); + + // Reads a file into the provided data buffer. + // Returns number of bytes being read on success. -1 otherwise. + // If 0 is returned, it means that the reading is completed. + int read(char* buffer, int length); + + // Writes a blob to the file. + // Returns number of bytes being written on success. -1 otherwise. + int write(const KURL& blobURL, long long position, int length); + + // Truncates the file to the specified position. + // Returns true on success. False otherwise. + bool truncate(long long position); + +private: + FileStream(); + + PlatformFileHandle m_handle; + long long m_bytesProcessed; + long long m_totalBytesToRead; +}; + +} // namespace WebCore + +#endif // ENABLE(BLOB) || ENABLE(FILE_SYSTEM) + +#endif // FileStream_h |