Attempt to stabilize ODE. Now using constant step (sys_ticrate set steptime) - on...
[divverent/darkplaces.git] / common.c
1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19 */
20 // common.c -- misc functions used in client and server
21
22 #include <stdlib.h>
23 #include <fcntl.h>
24 #ifndef WIN32
25 #include <unistd.h>
26 #endif
27
28 #include "quakedef.h"
29
30 cvar_t registered = {0, "registered","0", "indicates if this is running registered quake (whether gfx/pop.lmp was found)"};
31 cvar_t cmdline = {0, "cmdline","0", "contains commandline the engine was launched with"};
32
33 char com_token[MAX_INPUTLINE];
34 int com_argc;
35 const char **com_argv;
36 int com_selffd = -1;
37
38 gamemode_t gamemode;
39 const char *gamename;
40 const char *gamedirname1;
41 const char *gamedirname2;
42 const char *gamescreenshotname;
43 const char *gameuserdirname;
44 char com_modname[MAX_OSPATH] = "";
45
46
47 /*
48 ============================================================================
49
50                                         BYTE ORDER FUNCTIONS
51
52 ============================================================================
53 */
54
55
56 float BuffBigFloat (const unsigned char *buffer)
57 {
58         union
59         {
60                 float f;
61                 unsigned int i;
62         }
63         u;
64         u.i = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
65         return u.f;
66 }
67
68 int BuffBigLong (const unsigned char *buffer)
69 {
70         return (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
71 }
72
73 short BuffBigShort (const unsigned char *buffer)
74 {
75         return (buffer[0] << 8) | buffer[1];
76 }
77
78 float BuffLittleFloat (const unsigned char *buffer)
79 {
80         union
81         {
82                 float f;
83                 unsigned int i;
84         }
85         u;
86         u.i = (buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0];
87         return u.f;
88 }
89
90 int BuffLittleLong (const unsigned char *buffer)
91 {
92         return (buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0];
93 }
94
95 short BuffLittleShort (const unsigned char *buffer)
96 {
97         return (buffer[1] << 8) | buffer[0];
98 }
99
100 void StoreBigLong (unsigned char *buffer, unsigned int i)
101 {
102         buffer[0] = (i >> 24) & 0xFF;
103         buffer[1] = (i >> 16) & 0xFF;
104         buffer[2] = (i >>  8) & 0xFF;
105         buffer[3] = i         & 0xFF;
106 }
107
108 void StoreBigShort (unsigned char *buffer, unsigned short i)
109 {
110         buffer[0] = (i >>  8) & 0xFF;
111         buffer[1] = i         & 0xFF;
112 }
113
114 void StoreLittleLong (unsigned char *buffer, unsigned int i)
115 {
116         buffer[0] = i         & 0xFF;
117         buffer[1] = (i >>  8) & 0xFF;
118         buffer[2] = (i >> 16) & 0xFF;
119         buffer[3] = (i >> 24) & 0xFF;
120 }
121
122 void StoreLittleShort (unsigned char *buffer, unsigned short i)
123 {
124         buffer[0] = i         & 0xFF;
125         buffer[1] = (i >>  8) & 0xFF;
126 }
127
128 /*
129 ============================================================================
130
131                                         CRC FUNCTIONS
132
133 ============================================================================
134 */
135
136 // this is a 16 bit, non-reflected CRC using the polynomial 0x1021
137 // and the initial and final xor values shown below...  in other words, the
138 // CCITT standard CRC used by XMODEM
139
140 #define CRC_INIT_VALUE  0xffff
141 #define CRC_XOR_VALUE   0x0000
142
143 static unsigned short crctable[256] =
144 {
145         0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
146         0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
147         0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
148         0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
149         0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
150         0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
151         0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
152         0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
153         0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
154         0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
155         0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
156         0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
157         0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
158         0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
159         0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
160         0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
161         0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
162         0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
163         0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
164         0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
165         0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
166         0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
167         0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
168         0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
169         0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
170         0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
171         0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
172         0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
173         0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
174         0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
175         0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
176         0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
177 };
178
179 unsigned short CRC_Block(const unsigned char *data, size_t size)
180 {
181         unsigned short crc = CRC_INIT_VALUE;
182         while (size--)
183                 crc = (crc << 8) ^ crctable[(crc >> 8) ^ (*data++)];
184         return crc ^ CRC_XOR_VALUE;
185 }
186
187 unsigned short CRC_Block_CaseInsensitive(const unsigned char *data, size_t size)
188 {
189         unsigned short crc = CRC_INIT_VALUE;
190         while (size--)
191                 crc = (crc << 8) ^ crctable[(crc >> 8) ^ (tolower(*data++))];
192         return crc ^ CRC_XOR_VALUE;
193 }
194
195 // QuakeWorld
196 static unsigned char chktbl[1024 + 4] =
197 {
198         0x78,0xd2,0x94,0xe3,0x41,0xec,0xd6,0xd5,0xcb,0xfc,0xdb,0x8a,0x4b,0xcc,0x85,0x01,
199         0x23,0xd2,0xe5,0xf2,0x29,0xa7,0x45,0x94,0x4a,0x62,0xe3,0xa5,0x6f,0x3f,0xe1,0x7a,
200         0x64,0xed,0x5c,0x99,0x29,0x87,0xa8,0x78,0x59,0x0d,0xaa,0x0f,0x25,0x0a,0x5c,0x58,
201         0xfb,0x00,0xa7,0xa8,0x8a,0x1d,0x86,0x80,0xc5,0x1f,0xd2,0x28,0x69,0x71,0x58,0xc3,
202         0x51,0x90,0xe1,0xf8,0x6a,0xf3,0x8f,0xb0,0x68,0xdf,0x95,0x40,0x5c,0xe4,0x24,0x6b,
203         0x29,0x19,0x71,0x3f,0x42,0x63,0x6c,0x48,0xe7,0xad,0xa8,0x4b,0x91,0x8f,0x42,0x36,
204         0x34,0xe7,0x32,0x55,0x59,0x2d,0x36,0x38,0x38,0x59,0x9b,0x08,0x16,0x4d,0x8d,0xf8,
205         0x0a,0xa4,0x52,0x01,0xbb,0x52,0xa9,0xfd,0x40,0x18,0x97,0x37,0xff,0xc9,0x82,0x27,
206         0xb2,0x64,0x60,0xce,0x00,0xd9,0x04,0xf0,0x9e,0x99,0xbd,0xce,0x8f,0x90,0x4a,0xdd,
207         0xe1,0xec,0x19,0x14,0xb1,0xfb,0xca,0x1e,0x98,0x0f,0xd4,0xcb,0x80,0xd6,0x05,0x63,
208         0xfd,0xa0,0x74,0xa6,0x86,0xf6,0x19,0x98,0x76,0x27,0x68,0xf7,0xe9,0x09,0x9a,0xf2,
209         0x2e,0x42,0xe1,0xbe,0x64,0x48,0x2a,0x74,0x30,0xbb,0x07,0xcc,0x1f,0xd4,0x91,0x9d,
210         0xac,0x55,0x53,0x25,0xb9,0x64,0xf7,0x58,0x4c,0x34,0x16,0xbc,0xf6,0x12,0x2b,0x65,
211         0x68,0x25,0x2e,0x29,0x1f,0xbb,0xb9,0xee,0x6d,0x0c,0x8e,0xbb,0xd2,0x5f,0x1d,0x8f,
212         0xc1,0x39,0xf9,0x8d,0xc0,0x39,0x75,0xcf,0x25,0x17,0xbe,0x96,0xaf,0x98,0x9f,0x5f,
213         0x65,0x15,0xc4,0x62,0xf8,0x55,0xfc,0xab,0x54,0xcf,0xdc,0x14,0x06,0xc8,0xfc,0x42,
214         0xd3,0xf0,0xad,0x10,0x08,0xcd,0xd4,0x11,0xbb,0xca,0x67,0xc6,0x48,0x5f,0x9d,0x59,
215         0xe3,0xe8,0x53,0x67,0x27,0x2d,0x34,0x9e,0x9e,0x24,0x29,0xdb,0x69,0x99,0x86,0xf9,
216         0x20,0xb5,0xbb,0x5b,0xb0,0xf9,0xc3,0x67,0xad,0x1c,0x9c,0xf7,0xcc,0xef,0xce,0x69,
217         0xe0,0x26,0x8f,0x79,0xbd,0xca,0x10,0x17,0xda,0xa9,0x88,0x57,0x9b,0x15,0x24,0xba,
218         0x84,0xd0,0xeb,0x4d,0x14,0xf5,0xfc,0xe6,0x51,0x6c,0x6f,0x64,0x6b,0x73,0xec,0x85,
219         0xf1,0x6f,0xe1,0x67,0x25,0x10,0x77,0x32,0x9e,0x85,0x6e,0x69,0xb1,0x83,0x00,0xe4,
220         0x13,0xa4,0x45,0x34,0x3b,0x40,0xff,0x41,0x82,0x89,0x79,0x57,0xfd,0xd2,0x8e,0xe8,
221         0xfc,0x1d,0x19,0x21,0x12,0x00,0xd7,0x66,0xe5,0xc7,0x10,0x1d,0xcb,0x75,0xe8,0xfa,
222         0xb6,0xee,0x7b,0x2f,0x1a,0x25,0x24,0xb9,0x9f,0x1d,0x78,0xfb,0x84,0xd0,0x17,0x05,
223         0x71,0xb3,0xc8,0x18,0xff,0x62,0xee,0xed,0x53,0xab,0x78,0xd3,0x65,0x2d,0xbb,0xc7,
224         0xc1,0xe7,0x70,0xa2,0x43,0x2c,0x7c,0xc7,0x16,0x04,0xd2,0x45,0xd5,0x6b,0x6c,0x7a,
225         0x5e,0xa1,0x50,0x2e,0x31,0x5b,0xcc,0xe8,0x65,0x8b,0x16,0x85,0xbf,0x82,0x83,0xfb,
226         0xde,0x9f,0x36,0x48,0x32,0x79,0xd6,0x9b,0xfb,0x52,0x45,0xbf,0x43,0xf7,0x0b,0x0b,
227         0x19,0x19,0x31,0xc3,0x85,0xec,0x1d,0x8c,0x20,0xf0,0x3a,0xfa,0x80,0x4d,0x2c,0x7d,
228         0xac,0x60,0x09,0xc0,0x40,0xee,0xb9,0xeb,0x13,0x5b,0xe8,0x2b,0xb1,0x20,0xf0,0xce,
229         0x4c,0xbd,0xc6,0x04,0x86,0x70,0xc6,0x33,0xc3,0x15,0x0f,0x65,0x19,0xfd,0xc2,0xd3,
230
231         // map checksum goes here
232         0x00,0x00,0x00,0x00
233 };
234
235 // QuakeWorld
236 unsigned char COM_BlockSequenceCRCByteQW(unsigned char *base, int length, int sequence)
237 {
238         unsigned char *p;
239         unsigned char chkb[60 + 4];
240
241         p = chktbl + (sequence % (sizeof(chktbl) - 8));
242
243         if (length > 60)
244                 length = 60;
245         memcpy(chkb, base, length);
246
247         chkb[length] = (sequence & 0xff) ^ p[0];
248         chkb[length+1] = p[1];
249         chkb[length+2] = ((sequence>>8) & 0xff) ^ p[2];
250         chkb[length+3] = p[3];
251
252         return CRC_Block(chkb, length + 4) & 0xff;
253 }
254
255 /*
256 ==============================================================================
257
258                         MESSAGE IO FUNCTIONS
259
260 Handles byte ordering and avoids alignment errors
261 ==============================================================================
262 */
263
264 //
265 // writing functions
266 //
267
268 void MSG_WriteChar (sizebuf_t *sb, int c)
269 {
270         unsigned char    *buf;
271
272         buf = SZ_GetSpace (sb, 1);
273         buf[0] = c;
274 }
275
276 void MSG_WriteByte (sizebuf_t *sb, int c)
277 {
278         unsigned char    *buf;
279
280         buf = SZ_GetSpace (sb, 1);
281         buf[0] = c;
282 }
283
284 void MSG_WriteShort (sizebuf_t *sb, int c)
285 {
286         unsigned char    *buf;
287
288         buf = SZ_GetSpace (sb, 2);
289         buf[0] = c&0xff;
290         buf[1] = c>>8;
291 }
292
293 void MSG_WriteLong (sizebuf_t *sb, int c)
294 {
295         unsigned char    *buf;
296
297         buf = SZ_GetSpace (sb, 4);
298         buf[0] = c&0xff;
299         buf[1] = (c>>8)&0xff;
300         buf[2] = (c>>16)&0xff;
301         buf[3] = c>>24;
302 }
303
304 void MSG_WriteFloat (sizebuf_t *sb, float f)
305 {
306         union
307         {
308                 float   f;
309                 int     l;
310         } dat;
311
312
313         dat.f = f;
314         dat.l = LittleLong (dat.l);
315
316         SZ_Write (sb, (unsigned char *)&dat.l, 4);
317 }
318
319 void MSG_WriteString (sizebuf_t *sb, const char *s)
320 {
321         if (!s || !*s)
322                 MSG_WriteChar (sb, 0);
323         else
324                 SZ_Write (sb, (unsigned char *)s, (int)strlen(s)+1);
325 }
326
327 void MSG_WriteUnterminatedString (sizebuf_t *sb, const char *s)
328 {
329         if (s && *s)
330                 SZ_Write (sb, (unsigned char *)s, (int)strlen(s));
331 }
332
333 void MSG_WriteCoord13i (sizebuf_t *sb, float f)
334 {
335         if (f >= 0)
336                 MSG_WriteShort (sb, (int)(f * 8.0 + 0.5));
337         else
338                 MSG_WriteShort (sb, (int)(f * 8.0 - 0.5));
339 }
340
341 void MSG_WriteCoord16i (sizebuf_t *sb, float f)
342 {
343         if (f >= 0)
344                 MSG_WriteShort (sb, (int)(f + 0.5));
345         else
346                 MSG_WriteShort (sb, (int)(f - 0.5));
347 }
348
349 void MSG_WriteCoord32f (sizebuf_t *sb, float f)
350 {
351         MSG_WriteFloat (sb, f);
352 }
353
354 void MSG_WriteCoord (sizebuf_t *sb, float f, protocolversion_t protocol)
355 {
356         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_NEHAHRABJP || protocol == PROTOCOL_NEHAHRABJP2 || protocol == PROTOCOL_NEHAHRABJP3 || protocol == PROTOCOL_QUAKEWORLD)
357                 MSG_WriteCoord13i (sb, f);
358         else if (protocol == PROTOCOL_DARKPLACES1)
359                 MSG_WriteCoord32f (sb, f);
360         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
361                 MSG_WriteCoord16i (sb, f);
362         else
363                 MSG_WriteCoord32f (sb, f);
364 }
365
366 void MSG_WriteVector (sizebuf_t *sb, float *v, protocolversion_t protocol)
367 {
368         MSG_WriteCoord (sb, v[0], protocol);
369         MSG_WriteCoord (sb, v[1], protocol);
370         MSG_WriteCoord (sb, v[2], protocol);
371 }
372
373 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
374 void MSG_WriteAngle8i (sizebuf_t *sb, float f)
375 {
376         if (f >= 0)
377                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) + 0.5) & 255);
378         else
379                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) - 0.5) & 255);
380 }
381
382 void MSG_WriteAngle16i (sizebuf_t *sb, float f)
383 {
384         if (f >= 0)
385                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) + 0.5) & 65535);
386         else
387                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) - 0.5) & 65535);
388 }
389
390 void MSG_WriteAngle32f (sizebuf_t *sb, float f)
391 {
392         MSG_WriteFloat (sb, f);
393 }
394
395 void MSG_WriteAngle (sizebuf_t *sb, float f, protocolversion_t protocol)
396 {
397         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_NEHAHRABJP || protocol == PROTOCOL_NEHAHRABJP2 || protocol == PROTOCOL_NEHAHRABJP3 || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4 || protocol == PROTOCOL_QUAKEWORLD)
398                 MSG_WriteAngle8i (sb, f);
399         else
400                 MSG_WriteAngle16i (sb, f);
401 }
402
403 //
404 // reading functions
405 //
406 int msg_readcount;
407 qboolean msg_badread;
408
409 void MSG_BeginReading (void)
410 {
411         msg_readcount = 0;
412         msg_badread = false;
413 }
414
415 int MSG_ReadLittleShort (void)
416 {
417         if (msg_readcount+2 > net_message.cursize)
418         {
419                 msg_badread = true;
420                 return -1;
421         }
422         msg_readcount += 2;
423         return (short)(net_message.data[msg_readcount-2] | (net_message.data[msg_readcount-1]<<8));
424 }
425
426 int MSG_ReadBigShort (void)
427 {
428         if (msg_readcount+2 > net_message.cursize)
429         {
430                 msg_badread = true;
431                 return -1;
432         }
433         msg_readcount += 2;
434         return (short)((net_message.data[msg_readcount-2]<<8) + net_message.data[msg_readcount-1]);
435 }
436
437 int MSG_ReadLittleLong (void)
438 {
439         if (msg_readcount+4 > net_message.cursize)
440         {
441                 msg_badread = true;
442                 return -1;
443         }
444         msg_readcount += 4;
445         return net_message.data[msg_readcount-4] | (net_message.data[msg_readcount-3]<<8) | (net_message.data[msg_readcount-2]<<16) | (net_message.data[msg_readcount-1]<<24);
446 }
447
448 int MSG_ReadBigLong (void)
449 {
450         if (msg_readcount+4 > net_message.cursize)
451         {
452                 msg_badread = true;
453                 return -1;
454         }
455         msg_readcount += 4;
456         return (net_message.data[msg_readcount-4]<<24) + (net_message.data[msg_readcount-3]<<16) + (net_message.data[msg_readcount-2]<<8) + net_message.data[msg_readcount-1];
457 }
458
459 float MSG_ReadLittleFloat (void)
460 {
461         union
462         {
463                 float f;
464                 int l;
465         } dat;
466         if (msg_readcount+4 > net_message.cursize)
467         {
468                 msg_badread = true;
469                 return -1;
470         }
471         msg_readcount += 4;
472         dat.l = net_message.data[msg_readcount-4] | (net_message.data[msg_readcount-3]<<8) | (net_message.data[msg_readcount-2]<<16) | (net_message.data[msg_readcount-1]<<24);
473         return dat.f;
474 }
475
476 float MSG_ReadBigFloat (void)
477 {
478         union
479         {
480                 float f;
481                 int l;
482         } dat;
483         if (msg_readcount+4 > net_message.cursize)
484         {
485                 msg_badread = true;
486                 return -1;
487         }
488         msg_readcount += 4;
489         dat.l = (net_message.data[msg_readcount-4]<<24) | (net_message.data[msg_readcount-3]<<16) | (net_message.data[msg_readcount-2]<<8) | net_message.data[msg_readcount-1];
490         return dat.f;
491 }
492
493 char *MSG_ReadString (void)
494 {
495         static char string[MAX_INPUTLINE];
496         int l,c;
497         for (l = 0;l < (int) sizeof(string) - 1 && (c = MSG_ReadByte()) != -1 && c != 0;l++)
498                 string[l] = c;
499         string[l] = 0;
500         return string;
501 }
502
503 int MSG_ReadBytes (int numbytes, unsigned char *out)
504 {
505         int l, c;
506         for (l = 0;l < numbytes && (c = MSG_ReadByte()) != -1;l++)
507                 out[l] = c;
508         return l;
509 }
510
511 float MSG_ReadCoord13i (void)
512 {
513         return MSG_ReadLittleShort() * (1.0/8.0);
514 }
515
516 float MSG_ReadCoord16i (void)
517 {
518         return (signed short) MSG_ReadLittleShort();
519 }
520
521 float MSG_ReadCoord32f (void)
522 {
523         return MSG_ReadLittleFloat();
524 }
525
526 float MSG_ReadCoord (protocolversion_t protocol)
527 {
528         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_NEHAHRABJP || protocol == PROTOCOL_NEHAHRABJP2 || protocol == PROTOCOL_NEHAHRABJP3 || protocol == PROTOCOL_QUAKEWORLD)
529                 return MSG_ReadCoord13i();
530         else if (protocol == PROTOCOL_DARKPLACES1)
531                 return MSG_ReadCoord32f();
532         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
533                 return MSG_ReadCoord16i();
534         else
535                 return MSG_ReadCoord32f();
536 }
537
538 void MSG_ReadVector (float *v, protocolversion_t protocol)
539 {
540         v[0] = MSG_ReadCoord(protocol);
541         v[1] = MSG_ReadCoord(protocol);
542         v[2] = MSG_ReadCoord(protocol);
543 }
544
545 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
546 float MSG_ReadAngle8i (void)
547 {
548         return (signed char) MSG_ReadByte () * (360.0/256.0);
549 }
550
551 float MSG_ReadAngle16i (void)
552 {
553         return (signed short)MSG_ReadShort () * (360.0/65536.0);
554 }
555
556 float MSG_ReadAngle32f (void)
557 {
558         return MSG_ReadFloat ();
559 }
560
561 float MSG_ReadAngle (protocolversion_t protocol)
562 {
563         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_NEHAHRABJP || protocol == PROTOCOL_NEHAHRABJP2 || protocol == PROTOCOL_NEHAHRABJP3 || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4 || protocol == PROTOCOL_QUAKEWORLD)
564                 return MSG_ReadAngle8i ();
565         else
566                 return MSG_ReadAngle16i ();
567 }
568
569
570 //===========================================================================
571
572 void SZ_Clear (sizebuf_t *buf)
573 {
574         buf->cursize = 0;
575 }
576
577 unsigned char *SZ_GetSpace (sizebuf_t *buf, int length)
578 {
579         unsigned char *data;
580
581         if (buf->cursize + length > buf->maxsize)
582         {
583                 if (!buf->allowoverflow)
584                         Host_Error ("SZ_GetSpace: overflow without allowoverflow set");
585
586                 if (length > buf->maxsize)
587                         Host_Error ("SZ_GetSpace: %i is > full buffer size", length);
588
589                 buf->overflowed = true;
590                 Con_Print("SZ_GetSpace: overflow\n");
591                 SZ_Clear (buf);
592         }
593
594         data = buf->data + buf->cursize;
595         buf->cursize += length;
596
597         return data;
598 }
599
600 void SZ_Write (sizebuf_t *buf, const unsigned char *data, int length)
601 {
602         memcpy (SZ_GetSpace(buf,length),data,length);
603 }
604
605 // LordHavoc: thanks to Fuh for bringing the pure evil of SZ_Print to my
606 // attention, it has been eradicated from here, its only (former) use in
607 // all of darkplaces.
608
609 static const char *hexchar = "0123456789ABCDEF";
610 void Com_HexDumpToConsole(const unsigned char *data, int size)
611 {
612         int i, j, n;
613         char text[1024];
614         char *cur, *flushpointer;
615         const unsigned char *d;
616         cur = text;
617         flushpointer = text + 512;
618         for (i = 0;i < size;)
619         {
620                 n = 16;
621                 if (n > size - i)
622                         n = size - i;
623                 d = data + i;
624                 // print offset
625                 *cur++ = hexchar[(i >> 12) & 15];
626                 *cur++ = hexchar[(i >>  8) & 15];
627                 *cur++ = hexchar[(i >>  4) & 15];
628                 *cur++ = hexchar[(i >>  0) & 15];
629                 *cur++ = ':';
630                 // print hex
631                 for (j = 0;j < 16;j++)
632                 {
633                         if (j < n)
634                         {
635                                 *cur++ = hexchar[(d[j] >> 4) & 15];
636                                 *cur++ = hexchar[(d[j] >> 0) & 15];
637                         }
638                         else
639                         {
640                                 *cur++ = ' ';
641                                 *cur++ = ' ';
642                         }
643                         if ((j & 3) == 3)
644                                 *cur++ = ' ';
645                 }
646                 // print text
647                 for (j = 0;j < 16;j++)
648                 {
649                         if (j < n)
650                         {
651                                 // color change prefix character has to be treated specially
652                                 if (d[j] == STRING_COLOR_TAG)
653                                 {
654                                         *cur++ = STRING_COLOR_TAG;
655                                         *cur++ = STRING_COLOR_TAG;
656                                 }
657                                 else if (d[j] >= (unsigned char) ' ')
658                                         *cur++ = d[j];
659                                 else
660                                         *cur++ = '.';
661                         }
662                         else
663                                 *cur++ = ' ';
664                 }
665                 *cur++ = '\n';
666                 i += n;
667                 if (cur >= flushpointer || i >= size)
668                 {
669                         *cur++ = 0;
670                         Con_Print(text);
671                         cur = text;
672                 }
673         }
674 }
675
676 void SZ_HexDumpToConsole(const sizebuf_t *buf)
677 {
678         Com_HexDumpToConsole(buf->data, buf->cursize);
679 }
680
681
682 //============================================================================
683
684 /*
685 ==============
686 COM_Wordwrap
687
688 Word wraps a string. The wordWidth function is guaranteed to be called exactly
689 once for each word in the string, so it may be stateful, no idea what that
690 would be good for any more. At the beginning of the string, it will be called
691 for the char 0 to initialize a clean state, and then once with the string " "
692 (a space) so the routine knows how long a space is.
693
694 In case no single character fits into the given width, the wordWidth function
695 must return the width of exactly one character.
696
697 Wrapped lines get the isContinuation flag set and are continuationWidth less wide.
698
699 The sum of the return values of the processLine function will be returned.
700 ==============
701 */
702 int COM_Wordwrap(const char *string, size_t length, float continuationWidth, float maxWidth, COM_WordWidthFunc_t wordWidth, void *passthroughCW, COM_LineProcessorFunc processLine, void *passthroughPL)
703 {
704         // Logic is as follows:
705         //
706         // For each word or whitespace:
707         //   Newline found? Output current line, advance to next line. This is not a continuation. Continue.
708         //   Space found? Always add it to the current line, no matter if it fits.
709         //   Word found? Check if current line + current word fits.
710         //     If it fits, append it. Continue.
711         //     If it doesn't fit, output current line, advance to next line. Append the word. This is a continuation. Continue.
712
713         qboolean isContinuation = false;
714         float spaceWidth;
715         const char *startOfLine = string;
716         const char *cursor = string;
717         const char *end = string + length;
718         float spaceUsedInLine = 0;
719         float spaceUsedForWord;
720         int result = 0;
721         size_t wordLen;
722         size_t dummy;
723
724         dummy = 0;
725         wordWidth(passthroughCW, NULL, &dummy, -1);
726         dummy = 1;
727         spaceWidth = wordWidth(passthroughCW, " ", &dummy, -1);
728
729         for(;;)
730         {
731                 char ch = (cursor < end) ? *cursor : 0;
732                 switch(ch)
733                 {
734                         case 0: // end of string
735                                 result += processLine(passthroughPL, startOfLine, cursor - startOfLine, spaceUsedInLine, isContinuation);
736                                 isContinuation = false;
737                                 goto out;
738                         case '\n': // end of line
739                                 result += processLine(passthroughPL, startOfLine, cursor - startOfLine, spaceUsedInLine, isContinuation);
740                                 isContinuation = false;
741                                 ++cursor;
742                                 startOfLine = cursor;
743                                 break;
744                         case ' ': // space
745                                 ++cursor;
746                                 spaceUsedInLine += spaceWidth;
747                                 break;
748                         default: // word
749                                 wordLen = 1;
750                                 while(cursor + wordLen < end)
751                                 {
752                                         switch(cursor[wordLen])
753                                         {
754                                                 case 0:
755                                                 case '\n':
756                                                 case ' ':
757                                                         goto out_inner;
758                                                 default:
759                                                         ++wordLen;
760                                                         break;
761                                         }
762                                 }
763                                 out_inner:
764                                 spaceUsedForWord = wordWidth(passthroughCW, cursor, &wordLen, maxWidth - continuationWidth); // this may have reduced wordLen when it won't fit - but this is GOOD. TODO fix words that do fit in a non-continuation line
765                                 if(wordLen < 1) // cannot happen according to current spec of wordWidth
766                                 {
767                                         wordLen = 1;
768                                         spaceUsedForWord = maxWidth + 1; // too high, forces it in a line of itself
769                                 }
770                                 if(spaceUsedInLine + spaceUsedForWord <= maxWidth || cursor == startOfLine)
771                                 {
772                                         // we can simply append it
773                                         cursor += wordLen;
774                                         spaceUsedInLine += spaceUsedForWord;
775                                 }
776                                 else
777                                 {
778                                         // output current line
779                                         result += processLine(passthroughPL, startOfLine, cursor - startOfLine, spaceUsedInLine, isContinuation);
780                                         isContinuation = true;
781                                         startOfLine = cursor;
782                                         cursor += wordLen;
783                                         spaceUsedInLine = continuationWidth + spaceUsedForWord;
784                                 }
785                 }
786         }
787         out:
788
789         return result;
790
791 /*
792         qboolean isContinuation = false;
793         float currentWordSpace = 0;
794         const char *currentWord = 0;
795         float minReserve = 0;
796
797         float spaceUsedInLine = 0;
798         const char *currentLine = 0;
799         const char *currentLineEnd = 0;
800         float currentLineFinalWhitespace = 0;
801         const char *p;
802
803         int result = 0;
804         minReserve = charWidth(passthroughCW, 0);
805         minReserve += charWidth(passthroughCW, ' ');
806
807         if(maxWidth < continuationWidth + minReserve)
808                 maxWidth = continuationWidth + minReserve;
809
810         charWidth(passthroughCW, 0);
811
812         for(p = string; p < string + length; ++p)
813         {
814                 char c = *p;
815                 float w = charWidth(passthroughCW, c);
816
817                 if(!currentWord)
818                 {
819                         currentWord = p;
820                         currentWordSpace = 0;
821                 }
822
823                 if(!currentLine)
824                 {
825                         currentLine = p;
826                         spaceUsedInLine = isContinuation ? continuationWidth : 0;
827                         currentLineEnd = 0;
828                 }
829
830                 if(c == ' ')
831                 {
832                         // 1. I can add the word AND a space - then just append it.
833                         if(spaceUsedInLine + currentWordSpace + w <= maxWidth)
834                         {
835                                 currentLineEnd = p; // note: space not included here
836                                 currentLineFinalWhitespace = w;
837                                 spaceUsedInLine += currentWordSpace + w;
838                         }
839                         // 2. I can just add the word - then append it, output current line and go to next one.
840                         else if(spaceUsedInLine + currentWordSpace <= maxWidth)
841                         {
842                                 result += processLine(passthroughPL, currentLine, p - currentLine, spaceUsedInLine + currentWordSpace, isContinuation);
843                                 currentLine = 0;
844                                 isContinuation = true;
845                         }
846                         // 3. Otherwise, output current line and go to next one, where I can add the word.
847                         else if(continuationWidth + currentWordSpace + w <= maxWidth)
848                         {
849                                 if(currentLineEnd)
850                                         result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
851                                 currentLine = currentWord;
852                                 spaceUsedInLine = continuationWidth + currentWordSpace + w;
853                                 currentLineEnd = p;
854                                 currentLineFinalWhitespace = w;
855                                 isContinuation = true;
856                         }
857                         // 4. We can't even do that? Then output both current and next word as new lines.
858                         else
859                         {
860                                 if(currentLineEnd)
861                                 {
862                                         result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
863                                         isContinuation = true;
864                                 }
865                                 result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace, isContinuation);
866                                 currentLine = 0;
867                                 isContinuation = true;
868                         }
869                         currentWord = 0;
870                 }
871                 else if(c == '\n')
872                 {
873                         // 1. I can add the word - then do it.
874                         if(spaceUsedInLine + currentWordSpace <= maxWidth)
875                         {
876                                 result += processLine(passthroughPL, currentLine, p - currentLine, spaceUsedInLine + currentWordSpace, isContinuation);
877                         }
878                         // 2. Otherwise, output current line, next one and make tabula rasa.
879                         else
880                         {
881                                 if(currentLineEnd)
882                                 {
883                                         processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
884                                         isContinuation = true;
885                                 }
886                                 result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace, isContinuation);
887                         }
888                         currentWord = 0;
889                         currentLine = 0;
890                         isContinuation = false;
891                 }
892                 else
893                 {
894                         currentWordSpace += w;
895                         if(
896                                 spaceUsedInLine + currentWordSpace > maxWidth // can't join this line...
897                                 &&
898                                 continuationWidth + currentWordSpace > maxWidth // can't join any other line...
899                         )
900                         {
901                                 // this word cannot join ANY line...
902                                 // so output the current line...
903                                 if(currentLineEnd)
904                                 {
905                                         result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
906                                         isContinuation = true;
907                                 }
908
909                                 // then this word's beginning...
910                                 if(isContinuation)
911                                 {
912                                         // it may not fit, but we know we have to split it into maxWidth - continuationWidth pieces
913                                         float pieceWidth = maxWidth - continuationWidth;
914                                         const char *pos = currentWord;
915                                         currentWordSpace = 0;
916
917                                         // reset the char width function to a state where no kerning occurs (start of word)
918                                         charWidth(passthroughCW, ' ');
919                                         while(pos <= p)
920                                         {
921                                                 float w = charWidth(passthroughCW, *pos);
922                                                 if(currentWordSpace + w > pieceWidth) // this piece won't fit any more
923                                                 {
924                                                         // print everything until it
925                                                         result += processLine(passthroughPL, currentWord, pos - currentWord, currentWordSpace, true);
926                                                         // go to here
927                                                         currentWord = pos;
928                                                         currentWordSpace = 0;
929                                                 }
930                                                 currentWordSpace += w;
931                                                 ++pos;
932                                         }
933                                         // now we have a currentWord that fits... set up its next line
934                                         // currentWordSpace has been set
935                                         // currentWord has been set
936                                         spaceUsedInLine = continuationWidth;
937                                         currentLine = currentWord;
938                                         currentLineEnd = 0;
939                                         isContinuation = true;
940                                 }
941                                 else
942                                 {
943                                         // we have a guarantee that it will fix (see if clause)
944                                         result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace - w, isContinuation);
945
946                                         // and use the rest of this word as new start of a line
947                                         currentWordSpace = w;
948                                         currentWord = p;
949                                         spaceUsedInLine = continuationWidth;
950                                         currentLine = p;
951                                         currentLineEnd = 0;
952                                         isContinuation = true;
953                                 }
954                         }
955                 }
956         }
957
958         if(!currentWord)
959         {
960                 currentWord = p;
961                 currentWordSpace = 0;
962         }
963
964         if(currentLine) // Same procedure as \n
965         {
966                 // Can I append the current word?
967                 if(spaceUsedInLine + currentWordSpace <= maxWidth)
968                         result += processLine(passthroughPL, currentLine, p - currentLine, spaceUsedInLine + currentWordSpace, isContinuation);
969                 else
970                 {
971                         if(currentLineEnd)
972                         {
973                                 result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
974                                 isContinuation = true;
975                         }
976                         result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace, isContinuation);
977                 }
978         }
979
980         return result;
981 */
982 }
983
984 /*
985 ==============
986 COM_ParseToken_Simple
987
988 Parse a token out of a string
989 ==============
990 */
991 int COM_ParseToken_Simple(const char **datapointer, qboolean returnnewline, qboolean parsebackslash)
992 {
993         int len;
994         int c;
995         const char *data = *datapointer;
996
997         len = 0;
998         com_token[0] = 0;
999
1000         if (!data)
1001         {
1002                 *datapointer = NULL;
1003                 return false;
1004         }
1005
1006 // skip whitespace
1007 skipwhite:
1008         // line endings:
1009         // UNIX: \n
1010         // Mac: \r
1011         // Windows: \r\n
1012         for (;ISWHITESPACE(*data) && ((*data != '\n' && *data != '\r') || !returnnewline);data++)
1013         {
1014                 if (*data == 0)
1015                 {
1016                         // end of file
1017                         *datapointer = NULL;
1018                         return false;
1019                 }
1020         }
1021
1022         // handle Windows line ending
1023         if (data[0] == '\r' && data[1] == '\n')
1024                 data++;
1025
1026         if (data[0] == '/' && data[1] == '/')
1027         {
1028                 // comment
1029                 while (*data && *data != '\n' && *data != '\r')
1030                         data++;
1031                 goto skipwhite;
1032         }
1033         else if (data[0] == '/' && data[1] == '*')
1034         {
1035                 // comment
1036                 data++;
1037                 while (*data && (data[0] != '*' || data[1] != '/'))
1038                         data++;
1039                 if (*data)
1040                         data++;
1041                 if (*data)
1042                         data++;
1043                 goto skipwhite;
1044         }
1045         else if (*data == '\"')
1046         {
1047                 // quoted string
1048                 for (data++;*data && *data != '\"';data++)
1049                 {
1050                         c = *data;
1051                         if (*data == '\\' && parsebackslash)
1052                         {
1053                                 data++;
1054                                 c = *data;
1055                                 if (c == 'n')
1056                                         c = '\n';
1057                                 else if (c == 't')
1058                                         c = '\t';
1059                         }
1060                         if (len < (int)sizeof(com_token) - 1)
1061                                 com_token[len++] = c;
1062                 }
1063                 com_token[len] = 0;
1064                 if (*data == '\"')
1065                         data++;
1066                 *datapointer = data;
1067                 return true;
1068         }
1069         else if (*data == '\r')
1070         {
1071                 // translate Mac line ending to UNIX
1072                 com_token[len++] = '\n';data++;
1073                 com_token[len] = 0;
1074                 *datapointer = data;
1075                 return true;
1076         }
1077         else if (*data == '\n')
1078         {
1079                 // single character
1080                 com_token[len++] = *data++;
1081                 com_token[len] = 0;
1082                 *datapointer = data;
1083                 return true;
1084         }
1085         else
1086         {
1087                 // regular word
1088                 for (;!ISWHITESPACE(*data);data++)
1089                         if (len < (int)sizeof(com_token) - 1)
1090                                 com_token[len++] = *data;
1091                 com_token[len] = 0;
1092                 *datapointer = data;
1093                 return true;
1094         }
1095 }
1096
1097 /*
1098 ==============
1099 COM_ParseToken_QuakeC
1100
1101 Parse a token out of a string
1102 ==============
1103 */
1104 int COM_ParseToken_QuakeC(const char **datapointer, qboolean returnnewline)
1105 {
1106         int len;
1107         int c;
1108         const char *data = *datapointer;
1109
1110         len = 0;
1111         com_token[0] = 0;
1112
1113         if (!data)
1114         {
1115                 *datapointer = NULL;
1116                 return false;
1117         }
1118
1119 // skip whitespace
1120 skipwhite:
1121         // line endings:
1122         // UNIX: \n
1123         // Mac: \r
1124         // Windows: \r\n
1125         for (;ISWHITESPACE(*data) && ((*data != '\n' && *data != '\r') || !returnnewline);data++)
1126         {
1127                 if (*data == 0)
1128                 {
1129                         // end of file
1130                         *datapointer = NULL;
1131                         return false;
1132                 }
1133         }
1134
1135         // handle Windows line ending
1136         if (data[0] == '\r' && data[1] == '\n')
1137                 data++;
1138
1139         if (data[0] == '/' && data[1] == '/')
1140         {
1141                 // comment
1142                 while (*data && *data != '\n' && *data != '\r')
1143                         data++;
1144                 goto skipwhite;
1145         }
1146         else if (data[0] == '/' && data[1] == '*')
1147         {
1148                 // comment
1149                 data++;
1150                 while (*data && (data[0] != '*' || data[1] != '/'))
1151                         data++;
1152                 if (*data)
1153                         data++;
1154                 if (*data)
1155                         data++;
1156                 goto skipwhite;
1157         }
1158         else if (*data == '\"' || *data == '\'')
1159         {
1160                 // quoted string
1161                 char quote = *data;
1162                 for (data++;*data && *data != quote;data++)
1163                 {
1164                         c = *data;
1165                         if (*data == '\\')
1166                         {
1167                                 data++;
1168                                 c = *data;
1169                                 if (c == 'n')
1170                                         c = '\n';
1171                                 else if (c == 't')
1172                                         c = '\t';
1173                         }
1174                         if (len < (int)sizeof(com_token) - 1)
1175                                 com_token[len++] = c;
1176                 }
1177                 com_token[len] = 0;
1178                 if (*data == quote)
1179                         data++;
1180                 *datapointer = data;
1181                 return true;
1182         }
1183         else if (*data == '\r')
1184         {
1185                 // translate Mac line ending to UNIX
1186                 com_token[len++] = '\n';data++;
1187                 com_token[len] = 0;
1188                 *datapointer = data;
1189                 return true;
1190         }
1191         else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == ':' || *data == ',' || *data == ';')
1192         {
1193                 // single character
1194                 com_token[len++] = *data++;
1195                 com_token[len] = 0;
1196                 *datapointer = data;
1197                 return true;
1198         }
1199         else
1200         {
1201                 // regular word
1202                 for (;!ISWHITESPACE(*data) && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != ':' && *data != ',' && *data != ';';data++)
1203                         if (len < (int)sizeof(com_token) - 1)
1204                                 com_token[len++] = *data;
1205                 com_token[len] = 0;
1206                 *datapointer = data;
1207                 return true;
1208         }
1209 }
1210
1211 /*
1212 ==============
1213 COM_ParseToken_VM_Tokenize
1214
1215 Parse a token out of a string
1216 ==============
1217 */
1218 int COM_ParseToken_VM_Tokenize(const char **datapointer, qboolean returnnewline)
1219 {
1220         int len;
1221         int c;
1222         const char *data = *datapointer;
1223
1224         len = 0;
1225         com_token[0] = 0;
1226
1227         if (!data)
1228         {
1229                 *datapointer = NULL;
1230                 return false;
1231         }
1232
1233 // skip whitespace
1234 skipwhite:
1235         // line endings:
1236         // UNIX: \n
1237         // Mac: \r
1238         // Windows: \r\n
1239         for (;ISWHITESPACE(*data) && ((*data != '\n' && *data != '\r') || !returnnewline);data++)
1240         {
1241                 if (*data == 0)
1242                 {
1243                         // end of file
1244                         *datapointer = NULL;
1245                         return false;
1246                 }
1247         }
1248
1249         // handle Windows line ending
1250         if (data[0] == '\r' && data[1] == '\n')
1251                 data++;
1252
1253         if (data[0] == '/' && data[1] == '/')
1254         {
1255                 // comment
1256                 while (*data && *data != '\n' && *data != '\r')
1257                         data++;
1258                 goto skipwhite;
1259         }
1260         else if (data[0] == '/' && data[1] == '*')
1261         {
1262                 // comment
1263                 data++;
1264                 while (*data && (data[0] != '*' || data[1] != '/'))
1265                         data++;
1266                 if (*data)
1267                         data++;
1268                 if (*data)
1269                         data++;
1270                 goto skipwhite;
1271         }
1272         else if (*data == '\"' || *data == '\'')
1273         {
1274                 char quote = *data;
1275                 // quoted string
1276                 for (data++;*data && *data != quote;data++)
1277                 {
1278                         c = *data;
1279                         if (*data == '\\')
1280                         {
1281                                 data++;
1282                                 c = *data;
1283                                 if (c == 'n')
1284                                         c = '\n';
1285                                 else if (c == 't')
1286                                         c = '\t';
1287                         }
1288                         if (len < (int)sizeof(com_token) - 1)
1289                                 com_token[len++] = c;
1290                 }
1291                 com_token[len] = 0;
1292                 if (*data == quote)
1293                         data++;
1294                 *datapointer = data;
1295                 return true;
1296         }
1297         else if (*data == '\r')
1298         {
1299                 // translate Mac line ending to UNIX
1300                 com_token[len++] = '\n';data++;
1301                 com_token[len] = 0;
1302                 *datapointer = data;
1303                 return true;
1304         }
1305         else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == ':' || *data == ',' || *data == ';')
1306         {
1307                 // single character
1308                 com_token[len++] = *data++;
1309                 com_token[len] = 0;
1310                 *datapointer = data;
1311                 return true;
1312         }
1313         else
1314         {
1315                 // regular word
1316                 for (;!ISWHITESPACE(*data) && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != ':' && *data != ',' && *data != ';';data++)
1317                         if (len < (int)sizeof(com_token) - 1)
1318                                 com_token[len++] = *data;
1319                 com_token[len] = 0;
1320                 *datapointer = data;
1321                 return true;
1322         }
1323 }
1324
1325 /*
1326 ==============
1327 COM_ParseToken_Console
1328
1329 Parse a token out of a string, behaving like the qwcl console
1330 ==============
1331 */
1332 int COM_ParseToken_Console(const char **datapointer)
1333 {
1334         int len;
1335         const char *data = *datapointer;
1336
1337         len = 0;
1338         com_token[0] = 0;
1339
1340         if (!data)
1341         {
1342                 *datapointer = NULL;
1343                 return false;
1344         }
1345
1346 // skip whitespace
1347 skipwhite:
1348         for (;ISWHITESPACE(*data);data++)
1349         {
1350                 if (*data == 0)
1351                 {
1352                         // end of file
1353                         *datapointer = NULL;
1354                         return false;
1355                 }
1356         }
1357
1358         if (*data == '/' && data[1] == '/')
1359         {
1360                 // comment
1361                 while (*data && *data != '\n' && *data != '\r')
1362                         data++;
1363                 goto skipwhite;
1364         }
1365         else if (*data == '\"')
1366         {
1367                 // quoted string
1368                 for (data++;*data && *data != '\"';data++)
1369                 {
1370                         // allow escaped " and \ case
1371                         if (*data == '\\' && (data[1] == '\"' || data[1] == '\\'))
1372                                 data++;
1373                         if (len < (int)sizeof(com_token) - 1)
1374                                 com_token[len++] = *data;
1375                 }
1376                 com_token[len] = 0;
1377                 if (*data == '\"')
1378                         data++;
1379                 *datapointer = data;
1380         }
1381         else
1382         {
1383                 // regular word
1384                 for (;!ISWHITESPACE(*data);data++)
1385                         if (len < (int)sizeof(com_token) - 1)
1386                                 com_token[len++] = *data;
1387                 com_token[len] = 0;
1388                 *datapointer = data;
1389         }
1390
1391         return true;
1392 }
1393
1394
1395 /*
1396 ================
1397 COM_CheckParm
1398
1399 Returns the position (1 to argc-1) in the program's argument list
1400 where the given parameter apears, or 0 if not present
1401 ================
1402 */
1403 int COM_CheckParm (const char *parm)
1404 {
1405         int i;
1406
1407         for (i=1 ; i<com_argc ; i++)
1408         {
1409                 if (!com_argv[i])
1410                         continue;               // NEXTSTEP sometimes clears appkit vars.
1411                 if (!strcmp (parm,com_argv[i]))
1412                         return i;
1413         }
1414
1415         return 0;
1416 }
1417
1418 //===========================================================================
1419
1420 // Game mods
1421
1422 typedef struct gamemode_info_s
1423 {
1424         const char* prog_name; // not null
1425         const char* cmdline; // not null
1426         const char* gamename; // not null
1427         const char* gamedirname1; // not null
1428         const char* gamedirname2; // null
1429         const char* gamescreenshotname; // not nul
1430         const char* gameuserdirname; // not null
1431 } gamemode_info_t;
1432
1433 static const gamemode_info_t gamemode_info [GAME_COUNT] =
1434 {// prog_name           cmdline                 gamename                                basegame        modgame                 screenshotprefix        userdir
1435
1436 // GAME_NORMAL
1437 // COMMANDLINEOPTION: Game: -quake runs the game Quake (default)
1438 { "",                           "-quake",               "DarkPlaces-Quake",             "id1",          NULL,                   "dp",                   "darkplaces" },
1439 // GAME_HIPNOTIC
1440 // COMMANDLINEOPTION: Game: -hipnotic runs Quake mission pack 1: The Scourge of Armagon
1441 { "hipnotic",           "-hipnotic",    "Darkplaces-Hipnotic",  "id1",          "hipnotic",             "dp",                   "darkplaces" },
1442 // GAME_ROGUE
1443 // COMMANDLINEOPTION: Game: -rogue runs Quake mission pack 2: The Dissolution of Eternity
1444 { "rogue",                      "-rogue",               "Darkplaces-Rogue",             "id1",          "rogue",                "dp",                   "darkplaces" },
1445 // GAME_NEHAHRA
1446 // COMMANDLINEOPTION: Game: -nehahra runs The Seal of Nehahra movie and game
1447 { "nehahra",            "-nehahra",             "DarkPlaces-Nehahra",   "id1",          "nehahra",              "dp",                   "darkplaces" },
1448 // GAME_NEXUIZ
1449 // COMMANDLINEOPTION: Game: -nexuiz runs the multiplayer game Nexuiz
1450 { "nexuiz",                     "-nexuiz",              "Nexuiz",                               "data",         NULL,                   "nexuiz",               "nexuiz" },
1451 // GAME_XONOTIC
1452 // COMMANDLINEOPTION: Game: -xonotic runs the multiplayer game Xonotic
1453 { "xonotic",                    "-xonotic",             "Xonotic",                              "data",         NULL,                   "xonotic",              "xonotic" },
1454 // GAME_TRANSFUSION
1455 // COMMANDLINEOPTION: Game: -transfusion runs Transfusion (the recreation of Blood in Quake)
1456 { "transfusion",        "-transfusion", "Transfusion",                  "basetf",       NULL,                   "transfusion",  "transfusion" },
1457 // GAME_GOODVSBAD2
1458 // COMMANDLINEOPTION: Game: -goodvsbad2 runs the psychadelic RTS FPS game Good Vs Bad 2
1459 { "gvb2",                       "-goodvsbad2",  "GoodVs.Bad2",                  "rts",          NULL,                   "gvb2",                 "gvb2" },
1460 // GAME_TEU
1461 // COMMANDLINEOPTION: Game: -teu runs The Evil Unleashed (this option is obsolete as they are not using darkplaces)
1462 { "teu",                        "-teu",                 "TheEvilUnleashed",             "baseteu",      NULL,                   "teu",                  "teu" },
1463 // GAME_BATTLEMECH
1464 // COMMANDLINEOPTION: Game: -battlemech runs the multiplayer topdown deathmatch game BattleMech
1465 { "battlemech",         "-battlemech",  "Battlemech",                   "base",         NULL,                   "battlemech",   "battlemech" },
1466 // GAME_ZYMOTIC
1467 // COMMANDLINEOPTION: Game: -zymotic runs the singleplayer game Zymotic
1468 { "zymotic",            "-zymotic",             "Zymotic",                              "basezym",              NULL,                   "zymotic",              "zymotic" },
1469 // GAME_SETHERAL
1470 // COMMANDLINEOPTION: Game: -setheral runs the multiplayer game Setheral
1471 { "setheral",           "-setheral",    "Setheral",                             "data",         NULL,                   "setheral",             "setheral" },
1472 // GAME_SOM
1473 // COMMANDLINEOPTION: Game: -som runs the multiplayer game Son Of Man
1474 { "som",                        "-som",                 "Son of Man",                   "id1",          "sonofman",             "som",                  "darkplaces" },
1475 // GAME_TENEBRAE
1476 // COMMANDLINEOPTION: Game: -tenebrae runs the graphics test mod known as Tenebrae (some features not implemented)
1477 { "tenebrae",           "-tenebrae",    "DarkPlaces-Tenebrae",  "id1",          "tenebrae",             "dp",                   "darkplaces" },
1478 // GAME_NEOTERIC
1479 // COMMANDLINEOPTION: Game: -neoteric runs the game Neoteric
1480 { "neoteric",           "-neoteric",    "Neoteric",                             "id1",          "neobase",              "neo",                  "darkplaces" },
1481 // GAME_OPENQUARTZ
1482 // COMMANDLINEOPTION: Game: -openquartz runs the game OpenQuartz, a standalone GPL replacement of the quake content
1483 { "openquartz",         "-openquartz",  "OpenQuartz",                   "id1",          NULL,                   "openquartz",   "darkplaces" },
1484 // GAME_PRYDON
1485 // COMMANDLINEOPTION: Game: -prydon runs the topdown point and click action-RPG Prydon Gate
1486 { "prydon",                     "-prydon",              "PrydonGate",                   "id1",          "prydon",               "prydon",               "darkplaces" },
1487 // GAME_DELUXEQUAKE
1488 // COMMANDLINEOPTION: Game: -dq runs the game Deluxe Quake
1489 { "dq", "-dq",  "Deluxe Quake",         "basedq",               "extradq",              "basedq",               "dq" },
1490 // GAME_THEHUNTED
1491 // COMMANDLINEOPTION: Game: -thehunted runs the game The Hunted
1492 { "thehunted",          "-thehunted",   "The Hunted",                   "thdata",       NULL,                   "th",                   "thehunted" },
1493 // GAME_DEFEATINDETAIL2
1494 // COMMANDLINEOPTION: Game: -did2 runs the game Defeat In Detail 2
1495 { "did2",                       "-did2",                "Defeat In Detail 2",   "data",         NULL,                   "did2_",                "did2" },
1496 // GAME_DARSANA
1497 // COMMANDLINEOPTION: Game: -darsana runs the game Darsana
1498 { "darsana",            "-darsana",     "Darsana",                      "ddata",        NULL,                   "darsana",                      "darsana" },
1499 // GAME_CONTAGIONTHEORY
1500 // COMMANDLINEOPTION: Game: -contagiontheory runs the game Contagion Theory
1501 { "contagiontheory",            "-contagiontheory",     "Contagion Theory",                     "ctdata",       NULL,                   "ct",                   "contagiontheory" },
1502 // GAME_EDU2P
1503 // COMMANDLINEOPTION: Game: -edu2p runs the game Edu2 prototype
1504 { "edu2p", "-edu2p", "EDU2 Prototype", "id1", "edu2", "edu2_p", "edu2prototype" },
1505 // GAME_PROPHECY
1506 // COMMANDLINEOPTION: Game: -prophecy runs the game Prophecy
1507 { "prophecy",                           "-prophecy",            "Prophecy",             "data",         NULL,                   "prophecy",                     "prophecy" },
1508 // GAME_BLOODOMNICIDE
1509 // COMMANDLINEOPTION: Game: -omnicide runs the game Blood Omnicide
1510 { "omnicide", "-omnicide", "Blood Omnicide", "kain", NULL, "omnicide", "omnicide" },
1511 // GAME_STEELSTORM
1512 // COMMANDLINEOPTION: Game: -steelstorm runs the game Steel Storm
1513 { "steelstorm",                         "-steelstorm",          "Steel-Storm",          "gamedata",             NULL,                   "ss",                   "steelstorm" },
1514 // GAME_STRAPBOMB
1515 // COMMANDLINEOPTION: Game: -strapbomb runs the game Strap-on-bomb Car
1516 { "strapbomb",                          "-strapbomb",           "Strap-on-bomb Car",            "id1",          NULL,                   "strap",                        "strapbomb" },
1517 // GAME_MOONHELM
1518 // COMMANDLINEOPTION: Game: -moonhelm runs the game MoonHelm
1519 { "moonhelm",                           "-moonhelm",            "MoonHelm",             "data",         NULL,                   "mh",                   "moonhelm" },
1520 };
1521
1522 void COM_InitGameType (void)
1523 {
1524         char name [MAX_OSPATH];
1525         unsigned int i;
1526         int t;
1527
1528         FS_StripExtension (com_argv[0], name, sizeof (name));
1529         COM_ToLowerString (name, name, sizeof (name));
1530
1531         // Check the binary name; default to GAME_NORMAL (0)
1532         gamemode = GAME_NORMAL;
1533         for (i = 1; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
1534                 if (strstr (name, gamemode_info[i].prog_name))
1535                 {
1536                         gamemode = (gamemode_t)i;
1537                         break;
1538                 }
1539
1540         // Look for a command-line option
1541         for (i = 0; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
1542                 if (COM_CheckParm (gamemode_info[i].cmdline))
1543                 {
1544                         gamemode = (gamemode_t)i;
1545                         break;
1546                 }
1547
1548         gamename = gamemode_info[gamemode].gamename;
1549         gamedirname1 = gamemode_info[gamemode].gamedirname1;
1550         gamedirname2 = gamemode_info[gamemode].gamedirname2;
1551         gamescreenshotname = gamemode_info[gamemode].gamescreenshotname;
1552         gameuserdirname = gamemode_info[gamemode].gameuserdirname;
1553
1554         if((t = COM_CheckParm("-customgamename")) && t + 1 < com_argc)
1555                 gamename = com_argv[t+1];
1556         if((t = COM_CheckParm("-customgamedirname1")) && t + 1 < com_argc)
1557                 gamedirname1 = com_argv[t+1];
1558         if((t = COM_CheckParm("-customgamedirname2")) && t + 1 < com_argc)
1559                 gamedirname2 = *com_argv[t+1] ? com_argv[t+1] : NULL;
1560         if((t = COM_CheckParm("-customgamescreenshotname")) && t + 1 < com_argc)
1561                 gamescreenshotname = com_argv[t+1];
1562         if((t = COM_CheckParm("-customgameuserdirname")) && t + 1 < com_argc)
1563                 gameuserdirname = com_argv[t+1];
1564 }
1565
1566
1567 /*
1568 ================
1569 COM_Init
1570 ================
1571 */
1572 void COM_Init_Commands (void)
1573 {
1574         int i, j, n;
1575         char com_cmdline[MAX_INPUTLINE];
1576
1577         Cvar_RegisterVariable (&registered);
1578         Cvar_RegisterVariable (&cmdline);
1579
1580         // reconstitute the command line for the cmdline externally visible cvar
1581         n = 0;
1582         for (j = 0;(j < MAX_NUM_ARGVS) && (j < com_argc);j++)
1583         {
1584                 i = 0;
1585                 if (strstr(com_argv[j], " "))
1586                 {
1587                         // arg contains whitespace, store quotes around it
1588                         com_cmdline[n++] = '\"';
1589                         while ((n < ((int)sizeof(com_cmdline) - 1)) && com_argv[j][i])
1590                                 com_cmdline[n++] = com_argv[j][i++];
1591                         com_cmdline[n++] = '\"';
1592                 }
1593                 else
1594                 {
1595                         while ((n < ((int)sizeof(com_cmdline) - 1)) && com_argv[j][i])
1596                                 com_cmdline[n++] = com_argv[j][i++];
1597                 }
1598                 if (n < ((int)sizeof(com_cmdline) - 1))
1599                         com_cmdline[n++] = ' ';
1600                 else
1601                         break;
1602         }
1603         com_cmdline[n] = 0;
1604         Cvar_Set ("cmdline", com_cmdline);
1605 }
1606
1607 /*
1608 ============
1609 va
1610
1611 does a varargs printf into a temp buffer, so I don't need to have
1612 varargs versions of all text functions.
1613 FIXME: make this buffer size safe someday
1614 ============
1615 */
1616 char *va(const char *format, ...)
1617 {
1618         va_list argptr;
1619         // LordHavoc: now cycles through 8 buffers to avoid problems in most cases
1620         static char string[8][1024], *s;
1621         static int stringindex = 0;
1622
1623         s = string[stringindex];
1624         stringindex = (stringindex + 1) & 7;
1625         va_start (argptr, format);
1626         dpvsnprintf (s, sizeof (string[0]), format,argptr);
1627         va_end (argptr);
1628
1629         return s;
1630 }
1631
1632
1633 //======================================
1634
1635 // snprintf and vsnprintf are NOT portable. Use their DP counterparts instead
1636
1637 #undef snprintf
1638 #undef vsnprintf
1639
1640 #ifdef WIN32
1641 # define snprintf _snprintf
1642 # define vsnprintf _vsnprintf
1643 #endif
1644
1645
1646 int dpsnprintf (char *buffer, size_t buffersize, const char *format, ...)
1647 {
1648         va_list args;
1649         int result;
1650
1651         va_start (args, format);
1652         result = dpvsnprintf (buffer, buffersize, format, args);
1653         va_end (args);
1654
1655         return result;
1656 }
1657
1658
1659 int dpvsnprintf (char *buffer, size_t buffersize, const char *format, va_list args)
1660 {
1661         int result;
1662
1663 #if _MSC_VER >= 1400
1664         result = _vsnprintf_s (buffer, buffersize, _TRUNCATE, format, args);
1665 #else
1666         result = vsnprintf (buffer, buffersize, format, args);
1667 #endif
1668         if (result < 0 || (size_t)result >= buffersize)
1669         {
1670                 buffer[buffersize - 1] = '\0';
1671                 return -1;
1672         }
1673
1674         return result;
1675 }
1676
1677
1678 //======================================
1679
1680 void COM_ToLowerString (const char *in, char *out, size_t size_out)
1681 {
1682         if (size_out == 0)
1683                 return;
1684
1685         while (*in && size_out > 1)
1686         {
1687                 if (*in >= 'A' && *in <= 'Z')
1688                         *out++ = *in++ + 'a' - 'A';
1689                 else
1690                         *out++ = *in++;
1691                 size_out--;
1692         }
1693         *out = '\0';
1694 }
1695
1696 void COM_ToUpperString (const char *in, char *out, size_t size_out)
1697 {
1698         if (size_out == 0)
1699                 return;
1700
1701         while (*in && size_out > 1)
1702         {
1703                 if (*in >= 'a' && *in <= 'z')
1704                         *out++ = *in++ + 'A' - 'a';
1705                 else
1706                         *out++ = *in++;
1707                 size_out--;
1708         }
1709         *out = '\0';
1710 }
1711
1712 int COM_StringBeginsWith(const char *s, const char *match)
1713 {
1714         for (;*s && *match;s++, match++)
1715                 if (*s != *match)
1716                         return false;
1717         return true;
1718 }
1719
1720 int COM_ReadAndTokenizeLine(const char **text, char **argv, int maxargc, char *tokenbuf, int tokenbufsize, const char *commentprefix)
1721 {
1722         int argc, commentprefixlength;
1723         char *tokenbufend;
1724         const char *l;
1725         argc = 0;
1726         tokenbufend = tokenbuf + tokenbufsize;
1727         l = *text;
1728         commentprefixlength = 0;
1729         if (commentprefix)
1730                 commentprefixlength = (int)strlen(commentprefix);
1731         while (*l && *l != '\n' && *l != '\r')
1732         {
1733                 if (!ISWHITESPACE(*l))
1734                 {
1735                         if (commentprefixlength && !strncmp(l, commentprefix, commentprefixlength))
1736                         {
1737                                 while (*l && *l != '\n' && *l != '\r')
1738                                         l++;
1739                                 break;
1740                         }
1741                         if (argc >= maxargc)
1742                                 return -1;
1743                         argv[argc++] = tokenbuf;
1744                         if (*l == '"')
1745                         {
1746                                 l++;
1747                                 while (*l && *l != '"')
1748                                 {
1749                                         if (tokenbuf >= tokenbufend)
1750                                                 return -1;
1751                                         *tokenbuf++ = *l++;
1752                                 }
1753                                 if (*l == '"')
1754                                         l++;
1755                         }
1756                         else
1757                         {
1758                                 while (!ISWHITESPACE(*l))
1759                                 {
1760                                         if (tokenbuf >= tokenbufend)
1761                                                 return -1;
1762                                         *tokenbuf++ = *l++;
1763                                 }
1764                         }
1765                         if (tokenbuf >= tokenbufend)
1766                                 return -1;
1767                         *tokenbuf++ = 0;
1768                 }
1769                 else
1770                         l++;
1771         }
1772         // line endings:
1773         // UNIX: \n
1774         // Mac: \r
1775         // Windows: \r\n
1776         if (*l == '\r')
1777                 l++;
1778         if (*l == '\n')
1779                 l++;
1780         *text = l;
1781         return argc;
1782 }
1783
1784 /*
1785 ============
1786 COM_StringLengthNoColors
1787
1788 calculates the visible width of a color coded string.
1789
1790 *valid is filled with TRUE if the string is a valid colored string (that is, if
1791 it does not end with an unfinished color code). If it gets filled with FALSE, a
1792 fix would be adding a STRING_COLOR_TAG at the end of the string.
1793
1794 valid can be set to NULL if the caller doesn't care.
1795
1796 For size_s, specify the maximum number of characters from s to use, or 0 to use
1797 all characters until the zero terminator.
1798 ============
1799 */
1800 size_t
1801 COM_StringLengthNoColors(const char *s, size_t size_s, qboolean *valid)
1802 {
1803         const char *end = size_s ? (s + size_s) : NULL;
1804         size_t len = 0;
1805         for(;;)
1806         {
1807                 switch((s == end) ? 0 : *s)
1808                 {
1809                         case 0:
1810                                 if(valid)
1811                                         *valid = TRUE;
1812                                 return len;
1813                         case STRING_COLOR_TAG:
1814                                 ++s;
1815                                 switch((s == end) ? 0 : *s)
1816                                 {
1817                                         case STRING_COLOR_RGB_TAG_CHAR:
1818                                                 if (s+1 != end && isxdigit(s[1]) &&
1819                                                         s+2 != end && isxdigit(s[2]) &&
1820                                                         s+3 != end && isxdigit(s[3]) )
1821                                                 {
1822                                                         s+=3;
1823                                                         break;
1824                                                 }
1825                                                 ++len; // STRING_COLOR_TAG
1826                                                 ++len; // STRING_COLOR_RGB_TAG_CHAR
1827                                                 break;
1828                                         case 0: // ends with unfinished color code!
1829                                                 ++len;
1830                                                 if(valid)
1831                                                         *valid = FALSE;
1832                                                 return len;
1833                                         case STRING_COLOR_TAG: // escaped ^
1834                                                 ++len;
1835                                                 break;
1836                                         case '0': case '1': case '2': case '3': case '4':
1837                                         case '5': case '6': case '7': case '8': case '9': // color code
1838                                                 break;
1839                                         default: // not a color code
1840                                                 ++len; // STRING_COLOR_TAG
1841                                                 ++len; // the character
1842                                                 break;
1843                                 }
1844                                 break;
1845                         default:
1846                                 ++len;
1847                                 break;
1848                 }
1849                 ++s;
1850         }
1851         // never get here
1852 }
1853
1854 /*
1855 ============
1856 COM_StringDecolorize
1857
1858 removes color codes from a string.
1859
1860 If escape_carets is true, the resulting string will be safe for printing. If
1861 escape_carets is false, the function will just strip color codes (for logging
1862 for example).
1863
1864 If the output buffer size did not suffice for converting, the function returns
1865 FALSE. Generally, if escape_carets is false, the output buffer needs
1866 strlen(str)+1 bytes, and if escape_carets is true, it can need strlen(str)*1.5+2
1867 bytes. In any case, the function makes sure that the resulting string is
1868 zero terminated.
1869
1870 For size_in, specify the maximum number of characters from in to use, or 0 to use
1871 all characters until the zero terminator.
1872 ============
1873 */
1874 qboolean
1875 COM_StringDecolorize(const char *in, size_t size_in, char *out, size_t size_out, qboolean escape_carets)
1876 {
1877 #define APPEND(ch) do { if(--size_out) { *out++ = (ch); } else { *out++ = 0; return FALSE; } } while(0)
1878         const char *end = size_in ? (in + size_in) : NULL;
1879         if(size_out < 1)
1880                 return FALSE;
1881         for(;;)
1882         {
1883                 switch((in == end) ? 0 : *in)
1884                 {
1885                         case 0:
1886                                 *out++ = 0;
1887                                 return TRUE;
1888                         case STRING_COLOR_TAG:
1889                                 ++in;
1890                                 switch((in == end) ? 0 : *in)
1891                                 {
1892                                         case STRING_COLOR_RGB_TAG_CHAR:
1893                                                 if (in+1 != end && isxdigit(in[1]) &&
1894                                                         in+2 != end && isxdigit(in[2]) &&
1895                                                         in+3 != end && isxdigit(in[3]) )
1896                                                 {
1897                                                         in+=3;
1898                                                         break;
1899                                                 }
1900                                                 APPEND(STRING_COLOR_TAG);
1901                                                 if(escape_carets)
1902                                                         APPEND(STRING_COLOR_TAG);
1903                                                 APPEND(STRING_COLOR_RGB_TAG_CHAR);
1904                                                 break;
1905                                         case 0: // ends with unfinished color code!
1906                                                 APPEND(STRING_COLOR_TAG);
1907                                                 // finish the code by appending another caret when escaping
1908                                                 if(escape_carets)
1909                                                         APPEND(STRING_COLOR_TAG);
1910                                                 *out++ = 0;
1911                                                 return TRUE;
1912                                         case STRING_COLOR_TAG: // escaped ^
1913                                                 APPEND(STRING_COLOR_TAG);
1914                                                 // append a ^ twice when escaping
1915                                                 if(escape_carets)
1916                                                         APPEND(STRING_COLOR_TAG);
1917                                                 break;
1918                                         case '0': case '1': case '2': case '3': case '4':
1919                                         case '5': case '6': case '7': case '8': case '9': // color code
1920                                                 break;
1921                                         default: // not a color code
1922                                                 APPEND(STRING_COLOR_TAG);
1923                                                 APPEND(*in);
1924                                                 break;
1925                                 }
1926                                 break;
1927                         default:
1928                                 APPEND(*in);
1929                                 break;
1930                 }
1931                 ++in;
1932         }
1933         // never get here
1934 #undef APPEND
1935 }
1936
1937 // written by Elric, thanks Elric!
1938 char *SearchInfostring(const char *infostring, const char *key)
1939 {
1940         static char value [MAX_INPUTLINE];
1941         char crt_key [MAX_INPUTLINE];
1942         size_t value_ind, key_ind;
1943         char c;
1944
1945         if (*infostring++ != '\\')
1946                 return NULL;
1947
1948         value_ind = 0;
1949         for (;;)
1950         {
1951                 key_ind = 0;
1952
1953                 // Get the key name
1954                 for (;;)
1955                 {
1956                         c = *infostring++;
1957
1958                         if (c == '\0')
1959                                 return NULL;
1960                         if (c == '\\' || key_ind == sizeof (crt_key) - 1)
1961                         {
1962                                 crt_key[key_ind] = '\0';
1963                                 break;
1964                         }
1965
1966                         crt_key[key_ind++] = c;
1967                 }
1968
1969                 // If it's the key we are looking for, save it in "value"
1970                 if (!strcmp(crt_key, key))
1971                 {
1972                         for (;;)
1973                         {
1974                                 c = *infostring++;
1975
1976                                 if (c == '\0' || c == '\\' || value_ind == sizeof (value) - 1)
1977                                 {
1978                                         value[value_ind] = '\0';
1979                                         return value;
1980                                 }
1981
1982                                 value[value_ind++] = c;
1983                         }
1984                 }
1985
1986                 // Else, skip the value
1987                 for (;;)
1988                 {
1989                         c = *infostring++;
1990
1991                         if (c == '\0')
1992                                 return NULL;
1993                         if (c == '\\')
1994                                 break;
1995                 }
1996         }
1997 }
1998
1999 void InfoString_GetValue(const char *buffer, const char *key, char *value, size_t valuelength)
2000 {
2001         int pos = 0, j;
2002         size_t keylength;
2003         if (!key)
2004                 key = "";
2005         keylength = strlen(key);
2006         if (valuelength < 1 || !value)
2007         {
2008                 Con_Printf("InfoString_GetValue: no room in value\n");
2009                 return;
2010         }
2011         value[0] = 0;
2012         if (strchr(key, '\\'))
2013         {
2014                 Con_Printf("InfoString_GetValue: key name \"%s\" contains \\ which is not possible in an infostring\n", key);
2015                 return;
2016         }
2017         if (strchr(key, '\"'))
2018         {
2019                 Con_Printf("InfoString_SetValue: key name \"%s\" contains \" which is not allowed in an infostring\n", key);
2020                 return;
2021         }
2022         if (!key[0])
2023         {
2024                 Con_Printf("InfoString_GetValue: can not look up a key with no name\n");
2025                 return;
2026         }
2027         while (buffer[pos] == '\\')
2028         {
2029                 if (!memcmp(buffer + pos+1, key, keylength))
2030                 {
2031                         for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2032                         pos++;
2033                         for (j = 0;buffer[pos+j] && buffer[pos+j] != '\\' && j < (int)valuelength - 1;j++)
2034                                 value[j] = buffer[pos+j];
2035                         value[j] = 0;
2036                         return;
2037                 }
2038                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2039                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2040         }
2041         // if we reach this point the key was not found
2042 }
2043
2044 void InfoString_SetValue(char *buffer, size_t bufferlength, const char *key, const char *value)
2045 {
2046         int pos = 0, pos2;
2047         size_t keylength;
2048         if (!key)
2049                 key = "";
2050         if (!value)
2051                 value = "";
2052         keylength = strlen(key);
2053         if (strchr(key, '\\') || strchr(value, '\\'))
2054         {
2055                 Con_Printf("InfoString_SetValue: \"%s\" \"%s\" contains \\ which is not possible to store in an infostring\n", key, value);
2056                 return;
2057         }
2058         if (strchr(key, '\"') || strchr(value, '\"'))
2059         {
2060                 Con_Printf("InfoString_SetValue: \"%s\" \"%s\" contains \" which is not allowed in an infostring\n", key, value);
2061                 return;
2062         }
2063         if (!key[0])
2064         {
2065                 Con_Printf("InfoString_SetValue: can not set a key with no name\n");
2066                 return;
2067         }
2068         while (buffer[pos] == '\\')
2069         {
2070                 if (!memcmp(buffer + pos+1, key, keylength))
2071                         break;
2072                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2073                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2074         }
2075         // if we found the key, find the end of it because we will be replacing it
2076         pos2 = pos;
2077         if (buffer[pos] == '\\')
2078         {
2079                 for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
2080                 for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
2081         }
2082         if (bufferlength <= pos + 1 + strlen(key) + 1 + strlen(value) + strlen(buffer + pos2))
2083         {
2084                 Con_Printf("InfoString_SetValue: no room for \"%s\" \"%s\" in infostring\n", key, value);
2085                 return;
2086         }
2087         if (value && value[0])
2088         {
2089                 // set the key/value and append the remaining text
2090                 char tempbuffer[4096];
2091                 strlcpy(tempbuffer, buffer + pos2, sizeof(tempbuffer));
2092                 dpsnprintf(buffer + pos, bufferlength - pos, "\\%s\\%s%s", key, value, tempbuffer);
2093         }
2094         else
2095         {
2096                 // just remove the key from the text
2097                 strlcpy(buffer + pos, buffer + pos2, bufferlength - pos);
2098         }
2099 }
2100
2101 void InfoString_Print(char *buffer)
2102 {
2103         int i;
2104         char key[2048];
2105         char value[2048];
2106         while (*buffer)
2107         {
2108                 if (*buffer != '\\')
2109                 {
2110                         Con_Printf("InfoString_Print: corrupt string\n");
2111                         return;
2112                 }
2113                 for (buffer++, i = 0;*buffer && *buffer != '\\';buffer++)
2114                         if (i < (int)sizeof(key)-1)
2115                                 key[i++] = *buffer;
2116                 key[i] = 0;
2117                 if (*buffer != '\\')
2118                 {
2119                         Con_Printf("InfoString_Print: corrupt string\n");
2120                         return;
2121                 }
2122                 for (buffer++, i = 0;*buffer && *buffer != '\\';buffer++)
2123                         if (i < (int)sizeof(value)-1)
2124                                 value[i++] = *buffer;
2125                 value[i] = 0;
2126                 // empty value is an error case
2127                 Con_Printf("%20s %s\n", key, value[0] ? value : "NO VALUE");
2128         }
2129 }
2130
2131 //========================================================
2132 // strlcat and strlcpy, from OpenBSD
2133
2134 /*
2135  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
2136  *
2137  * Permission to use, copy, modify, and distribute this software for any
2138  * purpose with or without fee is hereby granted, provided that the above
2139  * copyright notice and this permission notice appear in all copies.
2140  *
2141  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
2142  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
2143  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
2144  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
2145  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
2146  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
2147  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
2148  */
2149
2150 /*      $OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $    */
2151 /*      $OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $     */
2152
2153
2154 #ifndef HAVE_STRLCAT
2155 size_t
2156 strlcat(char *dst, const char *src, size_t siz)
2157 {
2158         register char *d = dst;
2159         register const char *s = src;
2160         register size_t n = siz;
2161         size_t dlen;
2162
2163         /* Find the end of dst and adjust bytes left but don't go past end */
2164         while (n-- != 0 && *d != '\0')
2165                 d++;
2166         dlen = d - dst;
2167         n = siz - dlen;
2168
2169         if (n == 0)
2170                 return(dlen + strlen(s));
2171         while (*s != '\0') {
2172                 if (n != 1) {
2173                         *d++ = *s;
2174                         n--;
2175                 }
2176                 s++;
2177         }
2178         *d = '\0';
2179
2180         return(dlen + (s - src));       /* count does not include NUL */
2181 }
2182 #endif  // #ifndef HAVE_STRLCAT
2183
2184
2185 #ifndef HAVE_STRLCPY
2186 size_t
2187 strlcpy(char *dst, const char *src, size_t siz)
2188 {
2189         register char *d = dst;
2190         register const char *s = src;
2191         register size_t n = siz;
2192
2193         /* Copy as many bytes as will fit */
2194         if (n != 0 && --n != 0) {
2195                 do {
2196                         if ((*d++ = *s++) == 0)
2197                                 break;
2198                 } while (--n != 0);
2199         }
2200
2201         /* Not enough room in dst, add NUL and traverse rest of src */
2202         if (n == 0) {
2203                 if (siz != 0)
2204                         *d = '\0';              /* NUL-terminate dst */
2205                 while (*s++)
2206                         ;
2207         }
2208
2209         return(s - src - 1);    /* count does not include NUL */
2210 }
2211
2212 #endif  // #ifndef HAVE_STRLCPY
2213
2214 void FindFraction(double val, int *num, int *denom, int denomMax)
2215 {
2216         int i;
2217         double bestdiff;
2218         // initialize
2219         bestdiff = fabs(val);
2220         *num = 0;
2221         *denom = 1;
2222
2223         for(i = 1; i <= denomMax; ++i)
2224         {
2225                 int inum = (int) floor(0.5 + val * i);
2226                 double diff = fabs(val - inum / (double)i);
2227                 if(diff < bestdiff)
2228                 {
2229                         bestdiff = diff;
2230                         *num = inum;
2231                         *denom = i;
2232                 }
2233         }
2234 }
2235
2236 // decodes an XPM from C syntax
2237 char **XPM_DecodeString(const char *in)
2238 {
2239         static char *tokens[257];
2240         static char lines[257][512];
2241         size_t line = 0;
2242
2243         // skip until "{" token
2244         while(COM_ParseToken_QuakeC(&in, false) && strcmp(com_token, "{"));
2245
2246         // now, read in succession: string, comma-or-}
2247         while(COM_ParseToken_QuakeC(&in, false))
2248         {
2249                 tokens[line] = lines[line];
2250                 strlcpy(lines[line++], com_token, sizeof(lines[0]));
2251                 if(!COM_ParseToken_QuakeC(&in, false))
2252                         return NULL;
2253                 if(!strcmp(com_token, "}"))
2254                         break;
2255                 if(strcmp(com_token, ","))
2256                         return NULL;
2257                 if(line >= sizeof(tokens) / sizeof(tokens[0]))
2258                         return NULL;
2259         }
2260
2261         return tokens;
2262 }
2263
2264 static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
2265 static void base64_3to4(const unsigned char *in, unsigned char *out, int bytes)
2266 {
2267         unsigned char i0 = (bytes > 0) ? in[0] : 0;
2268         unsigned char i1 = (bytes > 1) ? in[1] : 0;
2269         unsigned char i2 = (bytes > 2) ? in[2] : 0;
2270         unsigned char o0 = base64[i0 >> 2];
2271         unsigned char o1 = base64[((i0 << 4) | (i1 >> 4)) & 077];
2272         unsigned char o2 = base64[((i1 << 2) | (i2 >> 6)) & 077];
2273         unsigned char o3 = base64[i2 & 077];
2274         out[0] = (bytes > 0) ? o0 : '?';
2275         out[1] = (bytes > 0) ? o1 : '?';
2276         out[2] = (bytes > 1) ? o2 : '=';
2277         out[3] = (bytes > 2) ? o3 : '=';
2278 }
2279
2280 size_t base64_encode(unsigned char *buf, size_t buflen, size_t outbuflen)
2281 {
2282         size_t blocks, i;
2283         // expand the out-buffer
2284         blocks = (buflen + 2) / 3;
2285         if(blocks*4 > outbuflen)
2286                 return 0;
2287         for(i = blocks; i > 0; )
2288         {
2289                 --i;
2290                 base64_3to4(buf + 3*i, buf + 4*i, buflen - 3*i);
2291         }
2292         return blocks * 4;
2293 }