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raze-gles/polymer/eduke32/source/sync.c

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//-------------------------------------------------------------------------
/*
Copyright (C) 1997, 2005 - 3D Realms Entertainment
This file is part of Shadow Warrior version 1.2
Shadow Warrior 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.
Original Source: 1997 - Frank Maddin and Jim Norwood
Prepared for public release: 03/28/2005 - Charlie Wiederhold, 3D Realms
*/
//-------------------------------------------------------------------------
int g_numSyncBytes = 1;
char g_szfirstSyncMsg[MAXSYNCBYTES][60];
int g_foundSyncError = 0;
static int crctable[256];
#define updatecrc(dcrc,xz) (dcrc = (crctable[((dcrc)>>8)^((xz)&255)]^((dcrc)<<8)))
void initsynccrc(void)
{
int i, j, k, a;
for (j=0;j<256;j++) //Calculate CRC table
{
k = (j<<8); a = 0;
for (i=7;i>=0;i--)
{
if (((k^a)&0x8000) > 0)
a = ((a<<1)&65535) ^ 0x1021; //0x1021 = genpoly
else
a = ((a<<1)&65535);
k = ((k<<1)&65535);
}
crctable[j] = (a&65535);
}
}
char Net_PlayerSync(void)
{
short i;
unsigned short crc = 0;
DukePlayer_t *pp;
TRAVERSE_CONNECT(i)
{
pp = g_player[i].ps;
updatecrc(crc, pp->posx & 255);
updatecrc(crc, pp->posy & 255);
updatecrc(crc, pp->posz & 255);
updatecrc(crc, pp->ang & 255);
}
return ((char) crc & 255);
}
char Net_PlayerSync2(void)
{
int i;
int j, nextj;
unsigned short crc = 0;
DukePlayer_t *pp;
spritetype *spr;
TRAVERSE_CONNECT(i)
{
pp = g_player[i].ps;
updatecrc(crc, pp->horiz & 255);
updatecrc(crc, sprite[pp->i].extra & 255);
updatecrc(crc, pp->bobcounter & 255);
}
TRAVERSE_SPRITE_STAT(headspritestat[STAT_PLAYER], j, nextj)
{
spr = &sprite[j];
updatecrc(crc, (spr->x) & 255);
updatecrc(crc, (spr->y) & 255);
updatecrc(crc, (spr->z) & 255);
updatecrc(crc, (spr->ang) & 255);
}
return ((char) crc & 255);
}
char Net_ActorSync(void)
{
unsigned short crc = 0;
int j, nextj;
spritetype *spr;
TRAVERSE_SPRITE_STAT(headspritestat[STAT_ACTOR], j, nextj)
{
spr = &sprite[j];
updatecrc(crc, (spr->x) & 255);
updatecrc(crc, (spr->y) & 255);
updatecrc(crc, (spr->z) & 255);
updatecrc(crc, (spr->lotag) & 255);
updatecrc(crc, (spr->hitag) & 255);
updatecrc(crc, (spr->ang) & 255);
}
TRAVERSE_SPRITE_STAT(headspritestat[STAT_ZOMBIEACTOR], j, nextj)
{
spr = &sprite[j];
updatecrc(crc, (spr->x) & 255);
updatecrc(crc, (spr->y) & 255);
updatecrc(crc, (spr->z) & 255);
updatecrc(crc, (spr->lotag) & 255);
updatecrc(crc, (spr->hitag) & 255);
updatecrc(crc, (spr->ang) & 255);
}
return ((char) crc & 255);
}
char Net_WeaponSync(void)
{
unsigned short crc = 0;
int j, nextj;
spritetype *spr;
TRAVERSE_SPRITE_STAT(headspritestat[STAT_PROJECTILE], j, nextj)
{
spr = &sprite[j];
updatecrc(crc, (spr->x) & 255);
updatecrc(crc, (spr->y) & 255);
updatecrc(crc, (spr->z) & 255);
updatecrc(crc, (spr->ang) & 255);
}
return ((char) crc & 255);
}
char Net_MapSync(void)
{
unsigned short crc = 0;
int j, nextj;
spritetype *spr;
walltype *wal;
sectortype *sect;
TRAVERSE_SPRITE_STAT(headspritestat[STAT_EFFECTOR], j, nextj)
{
spr = &sprite[j];
updatecrc(crc, (spr->x) & 255);
updatecrc(crc, (spr->y) & 255);
updatecrc(crc, (spr->z) & 255);
updatecrc(crc, (spr->ang) & 255);
updatecrc(crc, (spr->lotag) & 255);
updatecrc(crc, (spr->hitag) & 255);
}
for (j=numwalls;j>=0;j--)
{
wal = &wall[j];
updatecrc(crc, (wal->x) & 255);
updatecrc(crc, (wal->y) & 255);
}
for (j=numsectors;j>=0;j--)
{
sect = &sector[j];
updatecrc(crc, (sect->floorz) & 255);
updatecrc(crc, (sect->ceilingz) & 255);
}
return ((char) crc & 255);
}
char Net_RandomSync(void)
{
unsigned short crc = 0;
updatecrc(crc, randomseed & 255);
updatecrc(crc, (randomseed >> 8) & 255);
updatecrc(crc, g_globalRandom & 255);
updatecrc(crc, (g_globalRandom >> 8) & 255);
if (g_numSyncBytes == 1)
{
updatecrc(crc,Net_PlayerSync() & 255);
updatecrc(crc,Net_PlayerSync2() & 255);
updatecrc(crc,Net_WeaponSync() & 255);
updatecrc(crc,Net_ActorSync() & 255);
}
return ((char) crc & 255);
}
char *SyncNames[] =
{
"Net_CheckRandomSync",
"Net_CheckPlayerSync",
"Net_CheckPlayerSync2",
"Net_CheckWeaponSync",
"Net_CheckActorSync",
"Net_CheckMapSync",
NULL
};
static char(*SyncFunc[MAXSYNCBYTES + 1])(void) =
{
Net_RandomSync,
Net_PlayerSync,
Net_PlayerSync2,
Net_WeaponSync,
Net_ActorSync,
Net_MapSync,
NULL
};
void Net_GetSyncStat(void)
{
int i;
playerdata_t *pp = &g_player[myconnectindex];
unsigned int val;
static unsigned int count;
if (numplayers < 2)
return;
for (i = 0; SyncFunc[i]; i++)
{
pp->syncval[pp->syncvalhead & (SYNCFIFOSIZ - 1)][i] = (*SyncFunc[i])();
}
val = pp->syncval[pp->syncvalhead & (SYNCFIFOSIZ - 1)][0];
count += val;
pp->syncvalhead++;
}
////////////////////////////////////////////////////////////////////////
//
// Sync Message print
//
////////////////////////////////////////////////////////////////////////
void Net_DisplaySyncMsg(void)
{
int i, j;
static unsigned int moveCount = 0;
extern unsigned int g_moveThingsCount;
// if (!SyncPrintMode)
// return;
if (numplayers < 2)
return;
for (i = 0; i < g_numSyncBytes; i++)
{
// syncstat is NON 0 - out of sync
if (syncstat[i] != 0)
{
if (g_numSyncBytes > 1)
{
sprintf(tempbuf, "Out Of Sync - %s", SyncNames[i]);
printext256(4L, 100L + (i * 8), 31, 1, tempbuf, 0);
}
if (!g_foundSyncError && g_szfirstSyncMsg[i][0] == '\0')
{
// g_foundSyncError one so test all of them and then never test again
g_foundSyncError = TRUE;
// save off loop count
moveCount = g_moveThingsCount;
for (j = 0; j < g_numSyncBytes; j++)
{
if (syncstat[j] != 0 && g_szfirstSyncMsg[j][0] == '\0')
{
sprintf(tempbuf, "Out Of Sync - %s", SyncNames[j]);
strcpy(g_szfirstSyncMsg[j], tempbuf);
}
}
}
}
}
// print out the g_szfirstSyncMsg message you got
for (i = 0; i < g_numSyncBytes; i++)
{
if (g_szfirstSyncMsg[i][0] != '\0')
{
if (g_numSyncBytes > 1)
{
sprintf(tempbuf, "FIRST %s", g_szfirstSyncMsg[i]);
printext256(4L, 44L + (i * 8), 31, 1, tempbuf, 0);
sprintf(tempbuf, "moveCount %d",moveCount);
printext256(4L, 52L + (i * 8), 31, 1, tempbuf, 0);
}
else
{
printext256(4L,100L,31,0,"Out Of Sync - Please restart game",0);
}
}
}
// if (syncstate != 0)
// printext256(68L, 92L, 1, 31, "Missed Network packet!", 0);
}
void Net_AddSyncInfoToPacket(int *j)
{
int sb;
int count = 0;
// sync testing
while (g_player[myconnectindex].syncvalhead != syncvaltail && count++ < 4)
{
for (sb = 0; sb < g_numSyncBytes; sb++)
packbuf[(*j)++] = g_player[myconnectindex].syncval[syncvaltail & (SYNCFIFOSIZ - 1)][sb];
syncvaltail++;
}
}
void Net_GetSyncInfoFromPacket(char *packbuf, int packbufleng, int *j, int otherconnectindex)
{
int sb, i;
extern int syncvaltail, syncvaltottail;
playerdata_t *ppo = &g_player[otherconnectindex];
char found = 0;
// have had problems with this routine crashing when players quit
// games.
// if ready2send is not set then don't try to get sync info
if (!ready2send)
return;
// Suspect that its trying to traverse the connect list
// for a player that does not exist. This tries to take care of that
TRAVERSE_CONNECT(i)
{
if (otherconnectindex == i)
found = 1;
}
if (!found)
return;
// sync testing
//while ((*j) != packbufleng) // changed this on Kens suggestion
while ((*j) < packbufleng)
{
for (sb = 0; sb < g_numSyncBytes; sb++)
{
ppo->syncval[ppo->syncvalhead & (SYNCFIFOSIZ - 1)][sb] = packbuf[(*j)++];
}
ppo->syncvalhead++;
}
// update syncstat
// if any of the syncstat vars is non-0 then there is a problem
TRAVERSE_CONNECT(i)
{
if (g_player[i].syncvalhead == syncvaltottail)
return;
}
//for (sb = 0; sb < g_numSyncBytes; sb++)
// syncstat[sb] = 0;
while (1)
{
for (i = connectpoint2[connecthead]; i >= 0; i = connectpoint2[i])
{
for (sb = 0; sb < g_numSyncBytes; sb++)
{
if (g_player[i].syncval[syncvaltottail & (SYNCFIFOSIZ - 1)][sb] != g_player[connecthead].syncval[syncvaltottail & (SYNCFIFOSIZ - 1)][sb])
{
syncstat[sb] = 1;
}
}
}
syncvaltottail++;
TRAVERSE_CONNECT(i)
{
if (g_player[i].syncvalhead == syncvaltottail)
return;
}
}
}
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