/usr/share/idl/thunderbird/nsISeekableStream.idl is in thunderbird-dev 1:52.8.0-1~deb8u1.
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/* 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/. */
/*
* nsISeekableStream
*
* Note that a stream might not implement all methods (e.g., a readonly stream
* won't implement setEOF)
*/
#include "nsISupports.idl"
[scriptable, uuid(8429d350-1040-4661-8b71-f2a6ba455980)]
interface nsISeekableStream : nsISupports
{
/*
* Sets the stream pointer to the value of the 'offset' parameter
*/
const int32_t NS_SEEK_SET = 0;
/*
* Sets the stream pointer to its current location plus the value
* of the offset parameter.
*/
const int32_t NS_SEEK_CUR = 1;
/*
* Sets the stream pointer to the size of the stream plus the value
* of the offset parameter.
*/
const int32_t NS_SEEK_END = 2;
/**
* seek
*
* This method moves the stream offset of the steam implementing this
* interface.
*
* @param whence specifies how to interpret the 'offset' parameter in
* setting the stream offset associated with the implementing
* stream.
*
* @param offset specifies a value, in bytes, that is used in conjunction
* with the 'whence' parameter to set the stream offset of the
* implementing stream. A negative value causes seeking in
* the reverse direction.
*
* @throws NS_BASE_STREAM_CLOSED if called on a closed stream.
*/
void seek(in long whence, in long long offset);
/**
* tell
*
* This method reports the current offset, in bytes, from the start of the
* stream.
*
* @throws NS_BASE_STREAM_CLOSED if called on a closed stream.
*/
long long tell();
/**
* setEOF
*
* This method truncates the stream at the current offset.
*
* @throws NS_BASE_STREAM_CLOSED if called on a closed stream.
*/
void setEOF();
};
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