ref: 1b3dff9b4a1236afdec52056a08df51505c19df7
dir: /src/net_structrw.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id: net_structrw.c 612 2006-09-17 20:37:26Z fraggle $
//
// Copyright(C) 2005 Simon Howard
//
// 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.
//
// $Log$
// Revision 1.8 2006/02/23 19:12:02 fraggle
// Add lowres_turn to indicate whether we generate angleturns which are
// 8-bit as opposed to 16-bit. This is used when recording demos without
// -longtics enabled. Sync this option between clients in a netgame, so
// that if one player is recording a Vanilla demo, all clients record
// in lowres.
//
// Revision 1.7 2006/02/23 18:19:05 fraggle
// Add lowres_turn parameter to net_full_ticcmd_t structure r/w functions
//
// Revision 1.6 2006/02/16 01:12:28 fraggle
// Define a new type net_full_ticcmd_t, a structure containing all ticcmds
// for a given tic. Store received game data in a receive window. Add
// send queues for clients and add data from the receive window to
// generate complete sets of ticcmds.
//
// Revision 1.5 2006/01/14 02:06:48 fraggle
// Include the game version in the settings structure.
//
// Revision 1.4 2006/01/13 02:22:47 fraggle
// Update prototypes to match header. Make sure we include the header in the
// source file.
//
// Revision 1.3 2006/01/13 02:20:12 fraggle
// Signed integer read functions. Use these when reading ticcmd diffs.
//
// Revision 1.2 2006/01/11 01:37:53 fraggle
// ticcmd diffs: allow compare and patching ticcmds, and reading/writing
// ticdiffs to packets.
//
// Revision 1.1 2005/12/30 18:58:22 fraggle
// Fix client code to correctly send reply to server on connection.
// Add "waiting screen" while waiting for the game to start.
// Hook in the new networking code into the main game code.
//
//
// Reading and writing various structures into packets
//
#include <stdlib.h>
#include <string.h>
#include "doomdef.h"
#include "net_packet.h"
#include "net_structrw.h"
void NET_WriteSettings(net_packet_t *packet, net_gamesettings_t *settings)
{
NET_WriteInt8(packet, settings->ticdup);
NET_WriteInt8(packet, settings->extratics);
NET_WriteInt8(packet, settings->deathmatch);
NET_WriteInt8(packet, settings->nomonsters);
NET_WriteInt8(packet, settings->episode);
NET_WriteInt8(packet, settings->map);
NET_WriteInt8(packet, settings->skill);
NET_WriteInt8(packet, settings->gameversion);
NET_WriteInt8(packet, settings->lowres_turn);
NET_WriteInt8(packet, settings->new_sync);
NET_WriteInt32(packet, settings->timelimit);
NET_WriteInt8(packet, settings->loadgame);
}
boolean NET_ReadSettings(net_packet_t *packet, net_gamesettings_t *settings)
{
return NET_ReadInt8(packet, (unsigned int *) &settings->ticdup)
&& NET_ReadInt8(packet, (unsigned int *) &settings->extratics)
&& NET_ReadInt8(packet, (unsigned int *) &settings->deathmatch)
&& NET_ReadInt8(packet, (unsigned int *) &settings->nomonsters)
&& NET_ReadInt8(packet, (unsigned int *) &settings->episode)
&& NET_ReadInt8(packet, (unsigned int *) &settings->map)
&& NET_ReadInt8(packet, (unsigned int *) &settings->skill)
&& NET_ReadInt8(packet, (unsigned int *) &settings->gameversion)
&& NET_ReadInt8(packet, (unsigned int *) &settings->lowres_turn)
&& NET_ReadInt8(packet, (unsigned int *) &settings->new_sync)
&& NET_ReadInt32(packet, (unsigned int *) &settings->timelimit)
&& NET_ReadSInt8(packet, (signed int *) &settings->loadgame);
}
boolean NET_ReadQueryData(net_packet_t *packet, net_querydata_t *query)
{
boolean result;
query->version = NET_ReadString(packet);
result = query->version != NULL
&& NET_ReadInt8(packet, (unsigned int *) &query->server_state)
&& NET_ReadInt8(packet, (unsigned int *) &query->num_players)
&& NET_ReadInt8(packet, (unsigned int *) &query->max_players)
&& NET_ReadInt8(packet, (unsigned int *) &query->gamemode)
&& NET_ReadInt8(packet, (unsigned int *) &query->gamemission);
if (result)
{
query->description = NET_ReadString(packet);
return query->description != NULL;
}
else
{
return false;
}
}
void NET_WriteQueryData(net_packet_t *packet, net_querydata_t *query)
{
NET_WriteString(packet, query->version);
NET_WriteInt8(packet, query->server_state);
NET_WriteInt8(packet, query->num_players);
NET_WriteInt8(packet, query->max_players);
NET_WriteInt8(packet, query->gamemode);
NET_WriteInt8(packet, query->gamemission);
NET_WriteString(packet, query->description);
}
void NET_WriteTiccmdDiff(net_packet_t *packet, net_ticdiff_t *diff,
boolean lowres_turn)
{
// Header
NET_WriteInt8(packet, diff->diff);
// Write the fields which are enabled:
if (diff->diff & NET_TICDIFF_FORWARD)
NET_WriteInt8(packet, diff->cmd.forwardmove);
if (diff->diff & NET_TICDIFF_SIDE)
NET_WriteInt8(packet, diff->cmd.sidemove);
if (diff->diff & NET_TICDIFF_TURN)
{
if (lowres_turn)
{
NET_WriteInt8(packet, diff->cmd.angleturn / 256);
}
else
{
NET_WriteInt16(packet, diff->cmd.angleturn);
}
}
if (diff->diff & NET_TICDIFF_BUTTONS)
NET_WriteInt8(packet, diff->cmd.buttons);
if (diff->diff & NET_TICDIFF_CONSISTANCY)
NET_WriteInt8(packet, diff->cmd.consistancy);
if (diff->diff & NET_TICDIFF_CHATCHAR)
NET_WriteInt8(packet, diff->cmd.chatchar);
}
boolean NET_ReadTiccmdDiff(net_packet_t *packet, net_ticdiff_t *diff,
boolean lowres_turn)
{
unsigned int val;
signed int sval;
// Read header
if (!NET_ReadInt8(packet, &diff->diff))
return false;
// Read fields
if (diff->diff & NET_TICDIFF_FORWARD)
{
if (!NET_ReadSInt8(packet, &sval))
return false;
diff->cmd.forwardmove = sval;
}
if (diff->diff & NET_TICDIFF_SIDE)
{
if (!NET_ReadSInt8(packet, &sval))
return false;
diff->cmd.sidemove = sval;
}
if (diff->diff & NET_TICDIFF_TURN)
{
if (lowres_turn)
{
if (!NET_ReadSInt8(packet, &sval))
return false;
diff->cmd.angleturn = sval * 256;
}
else
{
if (!NET_ReadSInt16(packet, &sval))
return false;
diff->cmd.angleturn = sval;
}
}
if (diff->diff & NET_TICDIFF_BUTTONS)
{
if (!NET_ReadInt8(packet, &val))
return false;
diff->cmd.buttons = val;
}
if (diff->diff & NET_TICDIFF_CONSISTANCY)
{
if (!NET_ReadInt8(packet, &val))
return false;
diff->cmd.consistancy = val;
}
if (diff->diff & NET_TICDIFF_CHATCHAR)
{
if (!NET_ReadInt8(packet, &val))
return false;
diff->cmd.chatchar = val;
}
return true;
}
void NET_TiccmdDiff(ticcmd_t *tic1, ticcmd_t *tic2, net_ticdiff_t *diff)
{
diff->diff = 0;
diff->cmd = *tic2;
if (tic1->forwardmove != tic2->forwardmove)
diff->diff |= NET_TICDIFF_FORWARD;
if (tic1->sidemove != tic2->sidemove)
diff->diff |= NET_TICDIFF_SIDE;
if (tic1->angleturn != tic2->angleturn)
diff->diff |= NET_TICDIFF_TURN;
if (tic1->buttons != tic2->buttons)
diff->diff |= NET_TICDIFF_BUTTONS;
if (tic1->consistancy != tic2->consistancy)
diff->diff |= NET_TICDIFF_CONSISTANCY;
if (tic2->chatchar != 0)
diff->diff |= NET_TICDIFF_CHATCHAR;
}
void NET_TiccmdPatch(ticcmd_t *src, net_ticdiff_t *diff, ticcmd_t *dest)
{
memcpy(dest, src, sizeof(ticcmd_t));
// Apply the diff
if (diff->diff & NET_TICDIFF_FORWARD)
dest->forwardmove = diff->cmd.forwardmove;
if (diff->diff & NET_TICDIFF_SIDE)
dest->sidemove = diff->cmd.sidemove;
if (diff->diff & NET_TICDIFF_TURN)
dest->angleturn = diff->cmd.angleturn;
if (diff->diff & NET_TICDIFF_BUTTONS)
dest->buttons = diff->cmd.buttons;
if (diff->diff & NET_TICDIFF_CONSISTANCY)
dest->consistancy = diff->cmd.consistancy;
if (diff->diff & NET_TICDIFF_CHATCHAR)
dest->chatchar = diff->cmd.chatchar;
else
dest->chatchar = 0;
}
//
// net_full_ticcmd_t
//
boolean NET_ReadFullTiccmd(net_packet_t *packet, net_full_ticcmd_t *cmd, boolean lowres_turn)
{
unsigned int bitfield;
int i;
// Latency
if (!NET_ReadSInt16(packet, &cmd->latency))
{
return false;
}
// Regenerate playeringame from the "header" bitfield
if (!NET_ReadInt8(packet, &bitfield))
{
return false;
}
for (i=0; i<MAXPLAYERS; ++i)
{
cmd->playeringame[i] = (bitfield & (1 << i)) != 0;
}
// Read cmds
for (i=0; i<MAXPLAYERS; ++i)
{
if (cmd->playeringame[i])
{
if (!NET_ReadTiccmdDiff(packet, &cmd->cmds[i], lowres_turn))
{
return false;
}
}
}
return true;
}
void NET_WriteFullTiccmd(net_packet_t *packet, net_full_ticcmd_t *cmd, boolean lowres_turn)
{
unsigned int bitfield;
int i;
// Write the latency
NET_WriteInt16(packet, cmd->latency);
// Write "header" byte indicating which players are active
// in this ticcmd
bitfield = 0;
for (i=0; i<MAXPLAYERS; ++i)
{
if (cmd->playeringame[i])
{
bitfield |= 1 << i;
}
}
NET_WriteInt8(packet, bitfield);
// Write player ticcmds
for (i=0; i<MAXPLAYERS; ++i)
{
if (cmd->playeringame[i])
{
NET_WriteTiccmdDiff(packet, &cmd->cmds[i], lowres_turn);
}
}
}