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/*
* Copyright 2006 Serge van den Boom <svdb@stack.nl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef UQM_SUPERMELEE_NETPLAY_CHECKBUF_H_
#define UQM_SUPERMELEE_NETPLAY_CHECKBUF_H_
#if defined(__cplusplus)
extern "C" {
#endif
typedef struct ChecksumEntry ChecksumEntry;
typedef struct ChecksumBuffer ChecksumBuffer;
#if defined(__cplusplus)
}
#endif
#include "../../battle.h"
// for BattleFrameCounter
#include "checksum.h"
#if defined(__cplusplus)
extern "C" {
#endif
struct ChecksumEntry {
#ifdef NETPLAY_DEBUG
BattleFrameCounter frameNr;
// The number of the frame this checksum originated from.
// If the checksumming code is working correctly, the checksum
// can only come from one frame, so this value is not needed
// for normal operation.
// Its only use is to detect some cases where checksumming code
// is *not* working correctly.
#endif
Checksum checksum;
};
struct ChecksumBuffer {
ChecksumEntry *checksums;
// Cyclic buffer. if 'size' > 0, then 'first' is an index to
// the first used entry, 'size' is the number of used
// entries in the buffer, and (first + size) % maxSize is the
// index to just past the end of the buffer.
size_t maxSize;
size_t interval;
};
void ChecksumBuffer_init(ChecksumBuffer *cb, size_t delay, size_t interval);
void ChecksumBuffer_uninit(ChecksumBuffer *cb);
bool ChecksumBuffer_addChecksum(ChecksumBuffer *cb,
BattleFrameCounter frameNr, Checksum checksum);
bool ChecksumBuffer_getChecksum(ChecksumBuffer *cb,
BattleFrameCounter frameNr, Checksum *result);
#if defined(__cplusplus)
}
#endif
#endif /* UQM_SUPERMELEE_NETPLAY_CHECKBUF_H_ */
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