mirror of
https://github.com/transmission/transmission
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65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/*
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* This file Copyright (C) 2008-2009 Charles Kerr <charles@transmissionbt.com>
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2(b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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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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