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// 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 name Chromium Embedded

// Framework 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.

// ---------------------------------------------------------------------------

// The contents of this file must follow a specific format in order to

// support the CEF translator tool. See the translator.README.txt file in the

// tools directory for more information.

#ifndef CEF_INCLUDE_CEF_STREAM_H_

#define CEF_INCLUDE_CEF_STREAM_H_

#include "include/cef_base.h"

///

// Interface the client can implement to provide a custom stream reader. The

// methods of this class may be called on any thread.

///

/*--cef(source=client)--*/

class CefReadHandler : public virtual CefBaseRefCounted {

public:

///

// Read raw binary data.

///

/*--cef()--*/

virtual size_t Read(void* ptr, size_t size, size_t n) =0;

///

// Seek to the specified offset position. |whence| may be any one of

// SEEK_CUR, SEEK_END or SEEK_SET. Return zero on success and non-zero on

// failure.

///

/*--cef()--*/

virtual int Seek(int64 offset, int whence) =0;

///

// Return the current offset position.

///

/*--cef()--*/

virtual int64 Tell() =0;

///

// Return non-zero if at end of file.

///

/*--cef()--*/

virtual int Eof() =0;

///

// Return true if this handler performs work like accessing the file system

// which may block. Used as a hint for determining the thread to access the

// handler from.

///

/*--cef()--*/

virtual bool MayBlock() =0;

};

///

// Class used to read data from a stream. The methods of this class may be

// called on any thread.

///

/*--cef(source=library)--*/

class CefStreamReader : public virtual CefBaseRefCounted {

public:

///

// Create a new CefStreamReader object from a file.

///

/*--cef()--*/

static CefRefPtr<CefStreamReader> CreateForFile(const CefString& fileName);

///

// Create a new CefStreamReader object from data.

///

/*--cef()--*/

static CefRefPtr<CefStreamReader> CreateForData(void* data, size_t size);

///

// Create a new CefStreamReader object from a custom handler.

///

/*--cef()--*/

static CefRefPtr<CefStreamReader> CreateForHandler(

CefRefPtr<CefReadHandler> handler);

///

// Read raw binary data.

///

/*--cef()--*/

virtual size_t Read(void* ptr, size_t size, size_t n) =0;

///

// Seek to the specified offset position. |whence| may be any one of

// SEEK_CUR, SEEK_END or SEEK_SET. Returns zero on success and non-zero on

// failure.

///

/*--cef()--*/

virtual int Seek(int64 offset, int whence) =0;

///

// Return the current offset position.

///

/*--cef()--*/

virtual int64 Tell() =0;

///

// Return non-zero if at end of file.

///

/*--cef()--*/

virtual int Eof() =0;

///

// Returns true if this reader performs work like accessing the file system

// which may block. Used as a hint for determining the thread to access the

// reader from.

///

/*--cef()--*/

virtual bool MayBlock() =0;

};

///

// Interface the client can implement to provide a custom stream writer. The

// methods of this class may be called on any thread.

///

/*--cef(source=client)--*/

class CefWriteHandler : public virtual CefBaseRefCounted {

public:

///

// Write raw binary data.

///

/*--cef()--*/

virtual size_t Write(const void* ptr, size_t size, size_t n) =0;

///

// Seek to the specified offset position. |whence| may be any one of

// SEEK_CUR, SEEK_END or SEEK_SET. Return zero on success and non-zero on

// failure.

///

/*--cef()--*/

virtual int Seek(int64 offset, int whence) =0;

///

// Return the current offset position.

///

/*--cef()--*/

virtual int64 Tell() =0;

///

// Flush the stream.

///

/*--cef()--*/

virtual int Flush() =0;

///

// Return true if this handler performs work like accessing the file system

// which may block. Used as a hint for determining the thread to access the

// handler from.

///

/*--cef()--*/

virtual bool MayBlock() =0;

};

///

// Class used to write data to a stream. The methods of this class may be called

// on any thread.

///

/*--cef(source=library)--*/

class CefStreamWriter : public virtual CefBaseRefCounted {

public:

///

// Create a new CefStreamWriter object for a file.

///

/*--cef()--*/

static CefRefPtr<CefStreamWriter> CreateForFile(const CefString& fileName);

///

// Create a new CefStreamWriter object for a custom handler.

///

/*--cef()--*/

static CefRefPtr<CefStreamWriter> CreateForHandler(

CefRefPtr<CefWriteHandler> handler);

///

// Write raw binary data.

///

/*--cef()--*/

virtual size_t Write(const void* ptr, size_t size, size_t n) =0;

///

// Seek to the specified offset position. |whence| may be any one of

// SEEK_CUR, SEEK_END or SEEK_SET. Returns zero on success and non-zero on

// failure.

///

/*--cef()--*/

virtual int Seek(int64 offset, int whence) =0;

///

// Return the current offset position.

///

/*--cef()--*/

virtual int64 Tell() =0;

///

// Flush the stream.

///

/*--cef()--*/

virtual int Flush() =0;

///

// Returns true if this writer performs work like accessing the file system

// which may block. Used as a hint for determining the thread to access the

// writer from.

///

/*--cef()--*/

virtual bool MayBlock() =0;

};

#endif // CEF_INCLUDE_CEF_STREAM_H_

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