mirror of
https://github.com/transmission/transmission
synced 2024-12-25 01:03:01 +00:00
100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/*
|
|
* This file Copyright (C) 2008-2014 Mnemosyne LLC
|
|
*
|
|
* It may be used under the GNU GPL versions 2 or 3
|
|
* or any future license endorsed by Mnemosyne LLC.
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#ifndef __TRANSMISSION__
|
|
#error only libtransmission should #include this header.
|
|
#endif
|
|
|
|
#ifndef TR_BITFIELD_H
|
|
#define TR_BITFIELD_H 1
|
|
|
|
#include "transmission.h"
|
|
|
|
/** @brief Implementation of the BitTorrent spec's Bitfield array of bits */
|
|
typedef struct tr_bitfield
|
|
{
|
|
uint8_t * bits;
|
|
size_t alloc_count;
|
|
|
|
size_t bit_count;
|
|
|
|
size_t true_count;
|
|
|
|
/* Special cases for when full or empty but we don't know the bitCount.
|
|
This occurs when a magnet link's peers send have all / have none */
|
|
bool have_all_hint;
|
|
bool have_none_hint;
|
|
}
|
|
tr_bitfield;
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
void tr_bitfieldSetHasAll (tr_bitfield*);
|
|
|
|
void tr_bitfieldSetHasNone (tr_bitfield*);
|
|
|
|
void tr_bitfieldAdd (tr_bitfield*, size_t bit);
|
|
|
|
void tr_bitfieldRem (tr_bitfield*, size_t bit);
|
|
|
|
void tr_bitfieldAddRange (tr_bitfield*, size_t begin, size_t end);
|
|
|
|
void tr_bitfieldRemRange (tr_bitfield*, size_t begin, size_t end);
|
|
|
|
/***
|
|
**** life cycle
|
|
***/
|
|
|
|
extern const tr_bitfield TR_BITFIELD_INIT;
|
|
|
|
void tr_bitfieldConstruct (tr_bitfield*, size_t bit_count);
|
|
|
|
static inline void
|
|
tr_bitfieldDestruct (tr_bitfield * b)
|
|
{
|
|
tr_bitfieldSetHasNone (b);
|
|
}
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
void tr_bitfieldSetFromFlags (tr_bitfield*, const bool * bytes, size_t n);
|
|
|
|
void tr_bitfieldSetFromBitfield (tr_bitfield*, const tr_bitfield*);
|
|
|
|
void tr_bitfieldSetRaw (tr_bitfield*, const void * bits, size_t byte_count, bool bounded);
|
|
|
|
void* tr_bitfieldGetRaw (const tr_bitfield * b, size_t * byte_count);
|
|
|
|
/***
|
|
****
|
|
***/
|
|
|
|
size_t tr_bitfieldCountRange (const tr_bitfield*, size_t begin, size_t end);
|
|
|
|
size_t tr_bitfieldCountTrueBits (const tr_bitfield * b);
|
|
|
|
static inline bool
|
|
tr_bitfieldHasAll (const tr_bitfield * b)
|
|
{
|
|
return b->bit_count ? (b->true_count == b->bit_count) : b->have_all_hint;
|
|
}
|
|
|
|
static inline bool
|
|
tr_bitfieldHasNone (const tr_bitfield * b)
|
|
{
|
|
return b->bit_count ? (b->true_count == 0) : b->have_none_hint;
|
|
}
|
|
|
|
bool tr_bitfieldHas (const tr_bitfield * b, size_t n);
|
|
|
|
#endif
|