78 lines
3.0 KiB
C
78 lines
3.0 KiB
C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2005-2008 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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#ifndef __TRANSMISSION__
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#error only libtransmission should #include this header.
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#endif
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#ifndef TR_IO_H
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#define TR_IO_H 1
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struct tr_torrent;
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/**
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* Reads the block specified by the piece index, offset, and length.
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* @return 0 on success, or an errno value on failure.
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*/
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int tr_ioRead( const struct tr_torrent * tor,
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tr_piece_index_t pieceIndex,
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uint32_t offset,
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uint32_t len,
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uint8_t * setme );
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/**
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* Writes the block specified by the piece index, offset, and length.
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* @return 0 on success, or an errno value on failure.
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*/
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int tr_ioWrite( const struct tr_torrent * tor,
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tr_piece_index_t pieceIndex,
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uint32_t offset,
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uint32_t len,
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const uint8_t * writeme );
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/**
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* @brief Test to see if the piece matches its metainfo's SHA1 checksum.
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*
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* @param optionalBuffer if calling tr_ioTestPiece() repeatedly, you can
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* get best performance by providing a buffer with
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* tor->info.pieceSize bytes.
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*/
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tr_bool tr_ioTestPiece( const tr_torrent * tor,
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tr_piece_index_t piece,
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void * optionalBuffer,
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size_t optionalBufferLen );
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/**
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* Converts a piece index + offset into a file index + offset.
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*/
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void tr_ioFindFileLocation( const tr_torrent * tor,
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tr_piece_index_t pieceIndex,
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uint32_t pieceOffset,
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tr_file_index_t * fileIndex,
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uint64_t * fileOffset );
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#endif
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