summaryrefslogtreecommitdiff
path: root/src/net_structrw.c
blob: 03cb16e942280bb923707816df1b461f46a402b0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id: net_structrw.c 404 2006-03-02 00:10:23Z 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);
}

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);
}

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);
        }
    }
}