1 | /* |
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2 | * This file Copyright (C) Mnemosyne LLC |
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3 | * |
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4 | * This file is licensed by the GPL version 2. Works owned by the |
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5 | * Transmission project are granted a special exemption to clause 2(b) |
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6 | * so that the bulk of its code can remain under the MIT license. |
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7 | * This exemption does not extend to derived works not owned by |
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8 | * the Transmission project. |
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9 | * |
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10 | * $Id: inout.h 12204 2011-03-22 15:19:54Z jordan $ |
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11 | */ |
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12 | |
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13 | #ifndef __TRANSMISSION__ |
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14 | #error only libtransmission should #include this header. |
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15 | #endif |
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16 | |
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17 | #ifndef TR_IO_H |
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18 | #define TR_IO_H 1 |
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19 | |
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20 | struct tr_torrent; |
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21 | |
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22 | /** |
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23 | * @addtogroup file_io File IO |
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24 | * @{ |
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25 | */ |
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26 | |
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27 | /** |
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28 | * Reads the block specified by the piece index, offset, and length. |
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29 | * @return 0 on success, or an errno value on failure. |
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30 | */ |
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31 | int tr_ioRead( struct tr_torrent * tor, |
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32 | tr_piece_index_t pieceIndex, |
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33 | uint32_t offset, |
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34 | uint32_t len, |
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35 | uint8_t * setme ); |
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36 | |
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37 | int |
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38 | tr_ioPrefetch( tr_torrent * tor, |
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39 | tr_piece_index_t pieceIndex, |
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40 | uint32_t begin, |
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41 | uint32_t len ); |
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42 | |
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43 | /** |
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44 | * Writes the block specified by the piece index, offset, and length. |
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45 | * @return 0 on success, or an errno value on failure. |
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46 | */ |
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47 | int tr_ioWrite( struct tr_torrent * tor, |
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48 | tr_piece_index_t pieceIndex, |
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49 | uint32_t offset, |
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50 | uint32_t len, |
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51 | const uint8_t * writeme ); |
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52 | |
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53 | /** |
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54 | * @brief Test to see if the piece matches its metainfo's SHA1 checksum. |
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55 | */ |
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56 | bool tr_ioTestPiece( tr_torrent * tor, |
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57 | tr_piece_index_t piece ); |
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58 | |
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59 | |
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60 | /** |
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61 | * Converts a piece index + offset into a file index + offset. |
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62 | */ |
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63 | void tr_ioFindFileLocation( const tr_torrent * tor, |
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64 | tr_piece_index_t pieceIndex, |
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65 | uint32_t pieceOffset, |
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66 | tr_file_index_t * fileIndex, |
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67 | uint64_t * fileOffset ); |
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68 | |
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69 | |
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70 | /* @} */ |
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71 | #endif |
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