mirror of
https://github.com/transmission/transmission
synced 2024-12-27 18:18:10 +00:00
100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/*
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* This file Copyright (C) 2008-2014 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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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_BITFIELD_H
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#define TR_BITFIELD_H 1
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#include "transmission.h"
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/** @brief Implementation of the BitTorrent spec's Bitfield array of bits */
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typedef struct tr_bitfield
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{
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uint8_t * bits;
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size_t alloc_count;
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size_t bit_count;
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size_t true_count;
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/* Special cases for when full or empty but we don't know the bitCount.
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This occurs when a magnet link's peers send have all / have none */
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bool have_all_hint;
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bool have_none_hint;
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}
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tr_bitfield;
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/***
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****
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***/
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void tr_bitfieldSetHasAll (tr_bitfield*);
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void tr_bitfieldSetHasNone (tr_bitfield*);
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void tr_bitfieldAdd (tr_bitfield*, size_t bit);
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void tr_bitfieldRem (tr_bitfield*, size_t bit);
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void tr_bitfieldAddRange (tr_bitfield*, size_t begin, size_t end);
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void tr_bitfieldRemRange (tr_bitfield*, size_t begin, size_t end);
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/***
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**** life cycle
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***/
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extern const tr_bitfield TR_BITFIELD_INIT;
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void tr_bitfieldConstruct (tr_bitfield*, size_t bit_count);
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static inline void
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tr_bitfieldDestruct (tr_bitfield * b)
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{
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tr_bitfieldSetHasNone (b);
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}
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/***
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****
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***/
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void tr_bitfieldSetFromFlags (tr_bitfield*, const bool * bytes, size_t n);
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void tr_bitfieldSetFromBitfield (tr_bitfield*, const tr_bitfield*);
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void tr_bitfieldSetRaw (tr_bitfield*, const void * bits, size_t byte_count, bool bounded);
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void* tr_bitfieldGetRaw (const tr_bitfield * b, size_t * byte_count);
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/***
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****
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***/
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size_t tr_bitfieldCountRange (const tr_bitfield*, size_t begin, size_t end);
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size_t tr_bitfieldCountTrueBits (const tr_bitfield * b);
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static inline bool
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tr_bitfieldHasAll (const tr_bitfield * b)
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{
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return b->bit_count ? (b->true_count == b->bit_count) : b->have_all_hint;
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}
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static inline bool
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tr_bitfieldHasNone (const tr_bitfield * b)
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{
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return b->bit_count ? (b->true_count == 0) : b->have_none_hint;
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}
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bool tr_bitfieldHas (const tr_bitfield * b, size_t n);
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#endif
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