changed GAME_ init data to have a separate user config directory for each game type...
[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"};
31 cvar_t cmdline = {0, "cmdline","0"};
32
33 extern qboolean fs_modified;   // set true if using non-id files
34
35 char com_token[1024];
36 int com_argc;
37 const char **com_argv;
38
39 // LordHavoc: made commandline 1024 characters instead of 256
40 #define CMDLINE_LENGTH  1024
41 char com_cmdline[CMDLINE_LENGTH];
42
43 int gamemode;
44 const char *gamename;
45 const char *gamedirname1;
46 const char *gamedirname2;
47 const char *gamescreenshotname;
48 const char *gameuserdirname;
49 char com_modname[MAX_OSPATH] = "";
50
51
52 /*
53 ============================================================================
54
55                                         BYTE ORDER FUNCTIONS
56
57 ============================================================================
58 */
59
60 short   ShortSwap (short l)
61 {
62         qbyte    b1,b2;
63
64         b1 = l&255;
65         b2 = (l>>8)&255;
66
67         return (b1<<8) + b2;
68 }
69
70 int    LongSwap (int l)
71 {
72         qbyte    b1,b2,b3,b4;
73
74         b1 = l&255;
75         b2 = (l>>8)&255;
76         b3 = (l>>16)&255;
77         b4 = (l>>24)&255;
78
79         return ((int)b1<<24) + ((int)b2<<16) + ((int)b3<<8) + b4;
80 }
81
82 float FloatSwap (float f)
83 {
84         union
85         {
86                 float   f;
87                 qbyte    b[4];
88         } dat1, dat2;
89
90
91         dat1.f = f;
92         dat2.b[0] = dat1.b[3];
93         dat2.b[1] = dat1.b[2];
94         dat2.b[2] = dat1.b[1];
95         dat2.b[3] = dat1.b[0];
96         return dat2.f;
97 }
98
99
100 // Extract integers from buffers
101
102 unsigned int BuffBigLong (const qbyte *buffer)
103 {
104         return (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
105 }
106
107 unsigned short BuffBigShort (const qbyte *buffer)
108 {
109         return (buffer[0] << 8) | buffer[1];
110 }
111
112 unsigned int BuffLittleLong (const qbyte *buffer)
113 {
114         return (buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0];
115 }
116
117 unsigned short BuffLittleShort (const qbyte *buffer)
118 {
119         return (buffer[1] << 8) | buffer[0];
120 }
121
122
123 /*
124 ============================================================================
125
126                                         CRC FUNCTIONS
127
128 ============================================================================
129 */
130
131 // this is a 16 bit, non-reflected CRC using the polynomial 0x1021
132 // and the initial and final xor values shown below...  in other words, the
133 // CCITT standard CRC used by XMODEM
134
135 #define CRC_INIT_VALUE  0xffff
136 #define CRC_XOR_VALUE   0x0000
137
138 static unsigned short crctable[256] =
139 {
140         0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
141         0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
142         0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
143         0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
144         0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
145         0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
146         0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
147         0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
148         0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
149         0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
150         0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
151         0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
152         0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
153         0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
154         0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
155         0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
156         0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
157         0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
158         0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
159         0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
160         0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
161         0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
162         0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
163         0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
164         0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
165         0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
166         0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
167         0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
168         0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
169         0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
170         0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
171         0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
172 };
173
174 unsigned short CRC_Block(qbyte *data, int size)
175 {
176         unsigned short crc = CRC_INIT_VALUE;
177         while (size--)
178                 crc = (crc << 8) ^ crctable[(crc >> 8) ^ (*data++)];
179         return crc ^ CRC_XOR_VALUE;
180 }
181
182
183 /*
184 ==============================================================================
185
186                         MESSAGE IO FUNCTIONS
187
188 Handles byte ordering and avoids alignment errors
189 ==============================================================================
190 */
191
192 //
193 // writing functions
194 //
195
196 void MSG_WriteChar (sizebuf_t *sb, int c)
197 {
198         qbyte    *buf;
199
200         buf = SZ_GetSpace (sb, 1);
201         buf[0] = c;
202 }
203
204 void MSG_WriteByte (sizebuf_t *sb, int c)
205 {
206         qbyte    *buf;
207
208         buf = SZ_GetSpace (sb, 1);
209         buf[0] = c;
210 }
211
212 void MSG_WriteShort (sizebuf_t *sb, int c)
213 {
214         qbyte    *buf;
215
216         buf = SZ_GetSpace (sb, 2);
217         buf[0] = c&0xff;
218         buf[1] = c>>8;
219 }
220
221 void MSG_WriteLong (sizebuf_t *sb, int c)
222 {
223         qbyte    *buf;
224
225         buf = SZ_GetSpace (sb, 4);
226         buf[0] = c&0xff;
227         buf[1] = (c>>8)&0xff;
228         buf[2] = (c>>16)&0xff;
229         buf[3] = c>>24;
230 }
231
232 void MSG_WriteFloat (sizebuf_t *sb, float f)
233 {
234         union
235         {
236                 float   f;
237                 int     l;
238         } dat;
239
240
241         dat.f = f;
242         dat.l = LittleLong (dat.l);
243
244         SZ_Write (sb, &dat.l, 4);
245 }
246
247 void MSG_WriteString (sizebuf_t *sb, const char *s)
248 {
249         if (!s)
250                 SZ_Write (sb, "", 1);
251         else
252                 SZ_Write (sb, s, strlen(s)+1);
253 }
254
255 void MSG_WriteCoord13i (sizebuf_t *sb, float f)
256 {
257         if (f >= 0)
258                 MSG_WriteShort (sb, (int)(f * 8.0 + 0.5));
259         else
260                 MSG_WriteShort (sb, (int)(f * 8.0 - 0.5));
261 }
262
263 void MSG_WriteCoord16i (sizebuf_t *sb, float f)
264 {
265         if (f >= 0)
266                 MSG_WriteShort (sb, (int)(f + 0.5));
267         else
268                 MSG_WriteShort (sb, (int)(f - 0.5));
269 }
270
271 void MSG_WriteCoord32f (sizebuf_t *sb, float f)
272 {
273         MSG_WriteFloat (sb, f);
274 }
275
276 void MSG_WriteCoord (sizebuf_t *sb, float f, int protocol)
277 {
278         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_NEHAHRAMOVIE)
279                 MSG_WriteCoord13i (sb, f);
280         else if (protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES5 || protocol == PROTOCOL_DARKPLACES6)
281                 MSG_WriteCoord32f (sb, f);
282         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
283                 MSG_WriteCoord16i (sb, f);
284         else
285                 Host_Error("MSG_WriteCoord: unknown protocol\n");
286 }
287
288 void MSG_WriteVector (sizebuf_t *sb, float *v, int protocol)
289 {
290         MSG_WriteCoord (sb, v[0], protocol);
291         MSG_WriteCoord (sb, v[1], protocol);
292         MSG_WriteCoord (sb, v[2], protocol);
293 }
294
295 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
296 void MSG_WriteAngle8i (sizebuf_t *sb, float f)
297 {
298         if (f >= 0)
299                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) + 0.5) & 255);
300         else
301                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) - 0.5) & 255);
302 }
303
304 void MSG_WriteAngle16i (sizebuf_t *sb, float f)
305 {
306         if (f >= 0)
307                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) + 0.5) & 65535);
308         else
309                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) - 0.5) & 65535);
310 }
311
312 void MSG_WriteAngle32f (sizebuf_t *sb, float f)
313 {
314         MSG_WriteFloat (sb, f);
315 }
316
317 void MSG_WriteAngle (sizebuf_t *sb, float f, int protocol)
318 {
319         if (protocol == PROTOCOL_DARKPLACES5 || protocol == PROTOCOL_DARKPLACES6)
320                 MSG_WriteAngle16i (sb, f);
321         else
322                 MSG_WriteAngle8i (sb, f);
323 }
324
325 //
326 // reading functions
327 //
328 int msg_readcount;
329 qboolean msg_badread;
330
331 void MSG_BeginReading (void)
332 {
333         msg_readcount = 0;
334         msg_badread = false;
335 }
336
337 int MSG_ReadLittleShort (void)
338 {
339         if (msg_readcount+2 > net_message.cursize)
340         {
341                 msg_badread = true;
342                 return -1;
343         }
344         msg_readcount += 2;
345         return (short)(net_message.data[msg_readcount-2] | (net_message.data[msg_readcount-1]<<8));
346 }
347
348 int MSG_ReadBigShort (void)
349 {
350         if (msg_readcount+2 > net_message.cursize)
351         {
352                 msg_badread = true;
353                 return -1;
354         }
355         msg_readcount += 2;
356         return (short)((net_message.data[msg_readcount-2]<<8) + net_message.data[msg_readcount-1]);
357 }
358
359 int MSG_ReadLittleLong (void)
360 {
361         if (msg_readcount+4 > net_message.cursize)
362         {
363                 msg_badread = true;
364                 return -1;
365         }
366         msg_readcount += 4;
367         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);
368 }
369
370 int MSG_ReadBigLong (void)
371 {
372         if (msg_readcount+4 > net_message.cursize)
373         {
374                 msg_badread = true;
375                 return -1;
376         }
377         msg_readcount += 4;
378         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];
379 }
380
381 float MSG_ReadLittleFloat (void)
382 {
383         union
384         {
385                 float f;
386                 int l;
387         } dat;
388         if (msg_readcount+4 > net_message.cursize)
389         {
390                 msg_badread = true;
391                 return -1;
392         }
393         msg_readcount += 4;
394         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);
395         return dat.f;
396 }
397
398 float MSG_ReadBigFloat (void)
399 {
400         union
401         {
402                 float f;
403                 int l;
404         } dat;
405         if (msg_readcount+4 > net_message.cursize)
406         {
407                 msg_badread = true;
408                 return -1;
409         }
410         msg_readcount += 4;
411         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];
412         return dat.f;
413 }
414
415 char *MSG_ReadString (void)
416 {
417         static char string[2048];
418         int l,c;
419         for (l = 0;l < (int) sizeof(string) - 1 && (c = MSG_ReadChar()) != -1 && c != 0;l++)
420                 string[l] = c;
421         string[l] = 0;
422         return string;
423 }
424
425 int MSG_ReadBytes (int numbytes, unsigned char *out)
426 {
427         int l, c;
428         for (l = 0;l < numbytes && (c = MSG_ReadChar()) != -1;l++)
429                 out[l] = c;
430         return l;
431 }
432
433 float MSG_ReadCoord13i (void)
434 {
435         return MSG_ReadLittleShort() * (1.0/8.0);
436 }
437
438 float MSG_ReadCoord16i (void)
439 {
440         return (signed short) MSG_ReadLittleShort();
441 }
442
443 float MSG_ReadCoord32f (void)
444 {
445         return MSG_ReadLittleFloat();
446 }
447
448 float MSG_ReadCoord (int protocol)
449 {
450         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_NEHAHRAMOVIE)
451                 return MSG_ReadCoord13i();
452         else if (protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES5 || protocol == PROTOCOL_DARKPLACES6)
453                 return MSG_ReadCoord32f();
454         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
455                 return MSG_ReadCoord16i();
456         Host_Error("MSG_ReadCoord: unknown protocol\n");
457         return 0;
458 }
459
460 void MSG_ReadVector (float *v, int protocol)
461 {
462         v[0] = MSG_ReadCoord(protocol);
463         v[1] = MSG_ReadCoord(protocol);
464         v[2] = MSG_ReadCoord(protocol);
465 }
466
467 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
468 float MSG_ReadAngle8i (void)
469 {
470         return (signed char) MSG_ReadByte () * (360.0/256.0);
471 }
472
473 float MSG_ReadAngle16i (void)
474 {
475         return (signed short)MSG_ReadShort () * (360.0/65536.0);
476 }
477
478 float MSG_ReadAngle32f (void)
479 {
480         return MSG_ReadFloat ();
481 }
482
483 float MSG_ReadAngle (int protocol)
484 {
485         if (protocol == PROTOCOL_DARKPLACES5 || protocol == PROTOCOL_DARKPLACES6)
486                 return MSG_ReadAngle16i ();
487         else
488                 return MSG_ReadAngle8i ();
489 }
490
491
492 //===========================================================================
493
494 void SZ_Alloc (sizebuf_t *buf, int startsize, const char *name)
495 {
496         if (startsize < 256)
497                 startsize = 256;
498         buf->mempool = Mem_AllocPool(name, 0, NULL);
499         buf->data = Mem_Alloc(buf->mempool, startsize);
500         buf->maxsize = startsize;
501         buf->cursize = 0;
502 }
503
504
505 void SZ_Free (sizebuf_t *buf)
506 {
507         Mem_FreePool(&buf->mempool);
508         buf->data = NULL;
509         buf->maxsize = 0;
510         buf->cursize = 0;
511 }
512
513 void SZ_Clear (sizebuf_t *buf)
514 {
515         buf->cursize = 0;
516 }
517
518 void *SZ_GetSpace (sizebuf_t *buf, int length)
519 {
520         void *data;
521
522         if (buf->cursize + length > buf->maxsize)
523         {
524                 if (!buf->allowoverflow)
525                         Host_Error ("SZ_GetSpace: overflow without allowoverflow set\n");
526
527                 if (length > buf->maxsize)
528                         Host_Error ("SZ_GetSpace: %i is > full buffer size\n", length);
529
530                 buf->overflowed = true;
531                 Con_Print("SZ_GetSpace: overflow\n");
532                 SZ_Clear (buf);
533         }
534
535         data = buf->data + buf->cursize;
536         buf->cursize += length;
537
538         return data;
539 }
540
541 void SZ_Write (sizebuf_t *buf, const void *data, int length)
542 {
543         memcpy (SZ_GetSpace(buf,length),data,length);
544 }
545
546 // LordHavoc: thanks to Fuh for bringing the pure evil of SZ_Print to my
547 // attention, it has been eradicated from here, its only (former) use in
548 // all of darkplaces.
549
550 static char *hexchar = "0123456789ABCDEF";
551 void Com_HexDumpToConsole(const qbyte *data, int size)
552 {
553         int i, j, n;
554         char text[1024];
555         char *cur, *flushpointer;
556         const qbyte *d;
557         cur = text;
558         flushpointer = text + 512;
559         for (i = 0;i < size;)
560         {
561                 n = 16;
562                 if (n > size - i)
563                         n = size - i;
564                 d = data + i;
565                 // print offset
566                 *cur++ = hexchar[(i >> 12) & 15];
567                 *cur++ = hexchar[(i >>  8) & 15];
568                 *cur++ = hexchar[(i >>  4) & 15];
569                 *cur++ = hexchar[(i >>  0) & 15];
570                 *cur++ = ':';
571                 // print hex
572                 for (j = 0;j < 16;j++)
573                 {
574                         if (j < n)
575                         {
576                                 *cur++ = hexchar[(d[j] >> 4) & 15];
577                                 *cur++ = hexchar[(d[j] >> 0) & 15];
578                         }
579                         else
580                         {
581                                 *cur++ = ' ';
582                                 *cur++ = ' ';
583                         }
584                         if ((j & 3) == 3)
585                                 *cur++ = ' ';
586                 }
587                 // print text
588                 for (j = 0;j < 16;j++)
589                 {
590                         if (j < n)
591                         {
592                                 if (d[j] >= ' ' && d[j] <= 127)
593                                         *cur++ = d[j];
594                                 else
595                                         *cur++ = '.';
596                         }
597                         else
598                                 *cur++ = ' ';
599                 }
600                 *cur++ = '\n';
601                 i += n;
602                 if (cur >= flushpointer || i >= size)
603                 {
604                         *cur++ = 0;
605                         Con_Print(text);
606                         cur = text;
607                 }
608         }
609 }
610
611 void SZ_HexDumpToConsole(const sizebuf_t *buf)
612 {
613         Com_HexDumpToConsole(buf->data, buf->cursize);
614 }
615
616
617 //============================================================================
618
619
620 /*
621 ==============
622 COM_ParseToken
623
624 Parse a token out of a string
625 ==============
626 */
627 int COM_ParseToken(const char **datapointer, int returnnewline)
628 {
629         int len;
630         const char *data = *datapointer;
631
632         len = 0;
633         com_token[0] = 0;
634
635         if (!data)
636         {
637                 *datapointer = NULL;
638                 return false;
639         }
640
641 // skip whitespace
642 skipwhite:
643         for (;*data <= ' ' && (*data != '\n' || !returnnewline);data++)
644         {
645                 if (*data == 0)
646                 {
647                         // end of file
648                         *datapointer = NULL;
649                         return false;
650                 }
651         }
652
653         if (data[0] == '/' && data[1] == '/')
654         {
655                 // comment
656                 while (*data && *data != '\n')
657                         data++;
658                 goto skipwhite;
659         }
660         else if (data[0] == '/' && data[1] == '*')
661         {
662                 // comment
663                 data++;
664                 while (*data && (data[0] != '*' || data[1] != '/'))
665                         data++;
666                 data += 2;
667                 goto skipwhite;
668         }
669         else if (*data == '\"')
670         {
671                 // quoted string
672                 for (data++;*data != '\"';data++)
673                 {
674                         if (*data == '\\' && data[1] == '"' )
675                                 data++;
676                         if (!*data || len >= (int)sizeof(com_token) - 1)
677                         {
678                                 com_token[0] = 0;
679                                 *datapointer = NULL;
680                                 return false;
681                         }
682                         com_token[len++] = *data;
683                 }
684                 com_token[len] = 0;
685                 *datapointer = data+1;
686                 return true;
687         } 
688         else if (*data == '\'')
689         {
690                 // quoted string
691                 for (data++;*data != '\'';data++)
692                 {
693                         if (*data == '\\' && data[1] == '\'' )
694                                 data++;
695                         if (!*data || len >= (int)sizeof(com_token) - 1)
696                         {
697                                 com_token[0] = 0;
698                                 *datapointer = NULL;
699                                 return false;
700                         }
701                         com_token[len++] = *data;
702                 }
703                 com_token[len] = 0;
704                 *datapointer = data+1;
705                 return true;
706         }       
707         else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == '\'' || *data == ':' || *data == ',' || *data == ';')
708         {
709                 // single character
710                 com_token[len++] = *data++;
711                 com_token[len] = 0;
712                 *datapointer = data;
713                 return true;
714         }
715         else
716         {
717                 // regular word
718                 for (;*data > ' ' && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != '\'' && *data != ':' && *data != ',' && *data != ';' && *data != '\'' && *data != '"';data++)
719                 {
720                         if (len >= (int)sizeof(com_token) - 1)
721                         {
722                                 com_token[0] = 0;
723                                 *datapointer = NULL;
724                                 return false;
725                         }
726                         com_token[len++] = *data;
727                 }
728                 com_token[len] = 0;
729                 *datapointer = data;
730                 return true;
731         }
732 }
733
734 /*
735 ==============
736 COM_ParseTokenConsole
737
738 Parse a token out of a string, behaving like the qwcl console
739 ==============
740 */
741 int COM_ParseTokenConsole(const char **datapointer)
742 {
743         int len;
744         const char *data = *datapointer;
745
746         len = 0;
747         com_token[0] = 0;
748
749         if (!data)
750         {
751                 *datapointer = NULL;
752                 return false;
753         }
754
755 // skip whitespace
756 skipwhite:
757         for (;*data <= ' ';data++)
758         {
759                 if (*data == 0)
760                 {
761                         // end of file
762                         *datapointer = NULL;
763                         return false;
764                 }
765         }
766
767         if (*data == '/' && data[1] == '/')
768         {
769                 // comment
770                 while (*data && *data != '\n')
771                         data++;
772                 goto skipwhite;
773         }
774         else if (*data == '\"')
775         {
776                 // quoted string
777                 for (data++;*data != '\"';data++)
778                 {
779                         if (!*data || len >= (int)sizeof(com_token) - 1)
780                         {
781                                 com_token[0] = 0;
782                                 *datapointer = NULL;
783                                 return false;
784                         }
785                         com_token[len++] = *data;
786                 }
787                 com_token[len] = 0;
788                 *datapointer = data+1;
789                 return true;
790         }
791         else
792         {
793                 // regular word
794                 for (;*data > ' ';data++)
795                 {
796                         if (len >= (int)sizeof(com_token) - 1)
797                         {
798                                 com_token[0] = 0;
799                                 *datapointer = NULL;
800                                 return false;
801                         }
802                         com_token[len++] = *data;
803                 }
804                 com_token[len] = 0;
805                 *datapointer = data;
806                 return true;
807         }
808 }
809
810
811 /*
812 ================
813 COM_CheckParm
814
815 Returns the position (1 to argc-1) in the program's argument list
816 where the given parameter apears, or 0 if not present
817 ================
818 */
819 int COM_CheckParm (const char *parm)
820 {
821         int i;
822
823         for (i=1 ; i<com_argc ; i++)
824         {
825                 if (!com_argv[i])
826                         continue;               // NEXTSTEP sometimes clears appkit vars.
827                 if (!strcmp (parm,com_argv[i]))
828                         return i;
829         }
830
831         return 0;
832 }
833
834 /*
835 ================
836 COM_CheckRegistered
837
838 Looks for the pop.txt file and verifies it.
839 Sets the "registered" cvar.
840 Immediately exits out if an alternate game was attempted to be started without
841 being registered.
842 ================
843 */
844 void COM_CheckRegistered (void)
845 {
846         Cvar_Set ("cmdline", com_cmdline);
847
848         if (!FS_FileExists("gfx/pop.lmp"))
849         {
850                 if (fs_modified)
851                         Con_Print("Playing shareware version, with modification.\nwarning: most mods require full quake data.\n");
852                 else
853                         Con_Print("Playing shareware version.\n");
854                 return;
855         }
856
857         Cvar_Set ("registered", "1");
858         Con_Print("Playing registered version.\n");
859 }
860
861
862 /*
863 ================
864 COM_InitArgv
865 ================
866 */
867 void COM_InitArgv (void)
868 {
869         int i, j, n;
870         // reconstitute the command line for the cmdline externally visible cvar
871         n = 0;
872         for (j = 0;(j < MAX_NUM_ARGVS) && (j < com_argc);j++)
873         {
874                 i = 0;
875                 if (strstr(com_argv[j], " "))
876                 {
877                         // arg contains whitespace, store quotes around it
878                         com_cmdline[n++] = '\"';
879                         while ((n < (CMDLINE_LENGTH - 1)) && com_argv[j][i])
880                                 com_cmdline[n++] = com_argv[j][i++];
881                         com_cmdline[n++] = '\"';
882                 }
883                 else
884                 {
885                         while ((n < (CMDLINE_LENGTH - 1)) && com_argv[j][i])
886                                 com_cmdline[n++] = com_argv[j][i++];
887                 }
888                 if (n < (CMDLINE_LENGTH - 1))
889                         com_cmdline[n++] = ' ';
890                 else
891                         break;
892         }
893         com_cmdline[n] = 0;
894 }
895
896
897 //===========================================================================
898
899 // Game mods
900
901 typedef struct
902 {
903         const char* prog_name;
904         const char* cmdline;
905         const char* gamename;
906         const char* gamedirname1;
907         const char* gamedirname2;
908         const char* gamescreenshotname;
909         const char* gameuserdirname;
910 } gamemode_info_t;
911
912 static const gamemode_info_t gamemode_info [] =
913 {// prog_name           cmdline                 gamename                                gamedirname     gamescreenshotname
914
915 // GAME_NORMAL
916 // COMMANDLINEOPTION: Game: -quake runs the game Quake (default)
917 { "",                           "-quake",               "DarkPlaces-Quake",             "id1",          NULL,                   "dp",                   "darkplaces" },
918 // GAME_HIPNOTIC
919 // COMMANDLINEOPTION: Game: -hipnotic runs Quake mission pack 1: The Scourge of Armagon
920 { "hipnotic",           "-hipnotic",    "Darkplaces-Hipnotic",  "id1",          "hipnotic",             "dp",                   "darkplaces" },
921 // GAME_ROGUE
922 // COMMANDLINEOPTION: Game: -rogue runs Quake mission pack 2: The Dissolution of Eternity
923 { "rogue",                      "-rogue",               "Darkplaces-Rogue",             "id1",          "rogue",                "dp",                   "darkplaces" },
924 // GAME_NEHAHRA
925 // COMMANDLINEOPTION: Game: -nehahra runs The Seal of Nehahra movie and game
926 { "nehahra",            "-nehahra",             "DarkPlaces-Nehahra",   "id1",          "nehahra",              "dp",                   "darkplaces" },
927 // GAME_NEXUIZ
928 // COMMANDLINEOPTION: Game: -nexuiz runs the multiplayer game Nexuiz
929 { "nexuiz",                     "-nexuiz",              "Nexuiz",                               "data",         NULL,                   "nexuiz",               "nexuiz" },
930 // GAME_TRANSFUSION
931 // COMMANDLINEOPTION: Game: -transfusion runs Transfusion (the recreation of Blood in Quake)
932 { "transfusion",        "-transfusion", "Transfusion",                  "basetf",       NULL,                   "transfusion",  "transfusion" },
933 // GAME_GOODVSBAD2
934 // COMMANDLINEOPTION: Game: -goodvsbad2 runs the psychadelic RTS FPS game Good Vs Bad 2
935 { "gvb2",                       "-goodvsbad2",  "GoodVs.Bad2",                  "rts",          NULL,                   "gvb2",                 "gvb2" },
936 // GAME_TEU
937 // COMMANDLINEOPTION: Game: -teu runs The Evil Unleashed (this option is obsolete as they are not using darkplaces)
938 { "teu",                        "-teu",                 "TheEvilUnleashed",             "baseteu",      NULL,                   "teu",                  "teu" },
939 // GAME_BATTLEMECH
940 // COMMANDLINEOPTION: Game: -battlemech runs the multiplayer topdown deathmatch game BattleMech 
941 { "battlemech",         "-battlemech",  "Battlemech",                   "base",         NULL,                   "battlemech",   "battlemech" },
942 // GAME_ZYMOTIC
943 // COMMANDLINEOPTION: Game: -zymotic runs the singleplayer game Zymotic
944 { "zymotic",            "-zymotic",             "Zymotic",                              "data",         NULL,                   "zymotic",              "zymotic" },
945 // GAME_FNIGGIUM
946 // COMMANDLINEOPTION: Game: -fniggium runs the post apocalyptic melee RPG Fniggium 
947 { "fniggium",           "-fniggium",    "Fniggium",                             "data",         NULL,                   "fniggium",             "fniggium" },
948 // GAME_SETHERAL
949 // COMMANDLINEOPTION: Game: -setheral runs the multiplayer game Setheral 
950 { "setheral",           "-setheral",    "Setheral",                             "data",         NULL,                   "setheral",             "setheral" },
951 // GAME_SOM
952 // COMMANDLINEOPTION: Game: -som runs the multiplayer game Son Of Man 
953 { "som",                        "-som",                 "Son of Man",                   "id1",          "sonofman",             "som",                  "darkplaces" },
954 // GAME_TENEBRAE
955 // COMMANDLINEOPTION: Game: -tenebrae runs the graphics test mod known as Tenebrae (some features not implemented)
956 { "tenebrae",           "-tenebrae",    "DarkPlaces-Tenebrae",  "id1",          "tenebrae",             "dp",                   "darkplaces" },
957 // GAME_NEOTERIC
958 // COMMANDLINEOPTION: Game: -neoteric runs the game Neoteric
959 { "neoteric",           "-neoteric",    "Neoteric",                             "id1",          "neobase",              "neo",                  "darkplaces" },
960 // GAME_OPENQUARTZ
961 // COMMANDLINEOPTION: Game: -openquartz runs the game OpenQuartz, a standalone GPL replacement of the quake content
962 { "openquartz",         "-openquartz",  "OpenQuartz",                   "id1",          NULL,                   "openquartz",   "darkplaces"},
963 // GAME_PRYDON
964 // COMMANDLINEOPTION: Game: -prydon runs the topdown point and click action-RPG Prydon Gate
965 { "prydon",                     "-prydon",              "PrydonGate",                   "id1",          "prydon",               "prydon",               "darkplaces"},
966 // GAME_NETHERWORLD
967 // COMMANDLINEOPTION: Game: -netherworld runs the game Netherworld: Dark Masters
968 { "netherworld",        "-netherworld", "Dark Masters",                 "id1",          "netherworld",  "nw",                   "darkplaces"},
969 };
970
971 void COM_InitGameType (void)
972 {
973         char name [MAX_OSPATH];
974         unsigned int i;
975
976         FS_StripExtension (com_argv[0], name, sizeof (name));
977         COM_ToLowerString (name, name, sizeof (name));
978
979         // Check the binary name; default to GAME_NORMAL (0)
980         gamemode = GAME_NORMAL;
981         for (i = 1; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
982                 if (strstr (name, gamemode_info[i].prog_name))
983                 {
984                         gamemode = i;
985                         break;
986                 }
987
988         // Look for a command-line option
989         for (i = 0; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
990                 if (COM_CheckParm (gamemode_info[i].cmdline))
991                 {
992                         gamemode = i;
993                         break;
994                 }
995
996         gamename = gamemode_info[gamemode].gamename;
997         gamedirname1 = gamemode_info[gamemode].gamedirname1;
998         gamedirname2 = gamemode_info[gamemode].gamedirname2;
999         gamescreenshotname = gamemode_info[gamemode].gamescreenshotname;
1000         gameuserdirname = gamemode_info[gamemode].gameuserdirname;
1001 }
1002
1003
1004 extern void Mathlib_Init(void);
1005 extern void FS_Init (void);
1006
1007 /*
1008 ================
1009 COM_Init
1010 ================
1011 */
1012 void COM_Init (void)
1013 {
1014         Cvar_RegisterVariable (&registered);
1015         Cvar_RegisterVariable (&cmdline);
1016
1017         Mathlib_Init();
1018
1019         FS_Init ();
1020         COM_CheckRegistered ();
1021 }
1022
1023 extern void FS_Shutdown (void);
1024
1025 /*
1026 ================
1027 COM_Shutdown
1028 ================
1029 */
1030 void COM_Shutdown (void)
1031 {
1032         FS_Shutdown ();
1033 }
1034
1035 /*
1036 ============
1037 va
1038
1039 does a varargs printf into a temp buffer, so I don't need to have
1040 varargs versions of all text functions.
1041 FIXME: make this buffer size safe someday
1042 ============
1043 */
1044 char *va(const char *format, ...)
1045 {
1046         va_list argptr;
1047         // LordHavoc: now cycles through 8 buffers to avoid problems in most cases
1048         static char string[8][1024], *s;
1049         static int stringindex = 0;
1050
1051         s = string[stringindex];
1052         stringindex = (stringindex + 1) & 7;
1053         va_start (argptr, format);
1054         vsnprintf (s, sizeof (string[0]), format,argptr);
1055         va_end (argptr);
1056
1057         return s;
1058 }
1059
1060
1061 //======================================
1062
1063 void COM_ToLowerString (const char *in, char *out, size_t size_out)
1064 {
1065         if (size_out == 0)
1066                 return;
1067
1068         while (*in && size_out > 1)
1069         {
1070                 if (*in >= 'A' && *in <= 'Z')
1071                         *out++ = *in++ + 'a' - 'A';
1072                 else
1073                         *out++ = *in++;
1074                 size_out--;
1075         }
1076         *out = '\0';
1077 }
1078
1079 void COM_ToUpperString (const char *in, char *out, size_t size_out)
1080 {
1081         if (size_out == 0)
1082                 return;
1083
1084         while (*in && size_out > 1)
1085         {
1086                 if (*in >= 'a' && *in <= 'z')
1087                         *out++ = *in++ + 'A' - 'a';
1088                 else
1089                         *out++ = *in++;
1090                 size_out--;
1091         }
1092         *out = '\0';
1093 }
1094
1095 int COM_StringBeginsWith(const char *s, const char *match)
1096 {
1097         for (;*s && *match;s++, match++)
1098                 if (*s != *match)
1099                         return false;
1100         return true;
1101 }
1102
1103 int COM_ReadAndTokenizeLine(const char **text, char **argv, int maxargc, char *tokenbuf, int tokenbufsize, const char *commentprefix)
1104 {
1105         int argc, commentprefixlength;
1106         char *tokenbufend;
1107         const char *l;
1108         argc = 0;
1109         tokenbufend = tokenbuf + tokenbufsize;
1110         l = *text;
1111         commentprefixlength = 0;
1112         if (commentprefix)
1113                 commentprefixlength = strlen(commentprefix);
1114         while (*l && *l != '\n')
1115         {
1116                 if (*l > ' ')
1117                 {
1118                         if (commentprefixlength && !strncmp(l, commentprefix, commentprefixlength))
1119                         {
1120                                 while (*l && *l != '\n')
1121                                         l++;
1122                                 break;
1123                         }
1124                         if (argc >= maxargc)
1125                                 return -1;
1126                         argv[argc++] = tokenbuf;
1127                         if (*l == '"')
1128                         {
1129                                 l++;
1130                                 while (*l && *l != '"')
1131                                 {
1132                                         if (tokenbuf >= tokenbufend)
1133                                                 return -1;
1134                                         *tokenbuf++ = *l++;
1135                                 }
1136                                 if (*l == '"')
1137                                         l++;
1138                         }
1139                         else
1140                         {
1141                                 while (*l > ' ')
1142                                 {
1143                                         if (tokenbuf >= tokenbufend)
1144                                                 return -1;
1145                                         *tokenbuf++ = *l++;
1146                                 }
1147                         }
1148                         if (tokenbuf >= tokenbufend)
1149                                 return -1;
1150                         *tokenbuf++ = 0;
1151                 }
1152                 else
1153                         l++;
1154         }
1155         if (*l == '\n')
1156                 l++;
1157         *text = l;
1158         return argc;
1159 }
1160
1161 // written by Elric, thanks Elric!
1162 char *SearchInfostring(const char *infostring, const char *key)
1163 {
1164         static char value [256];
1165         char crt_key [256];
1166         size_t value_ind, key_ind;
1167         char c;
1168
1169         if (*infostring++ != '\\')
1170                 return NULL;
1171
1172         value_ind = 0;
1173         for (;;)
1174         {
1175                 key_ind = 0;
1176
1177                 // Get the key name
1178                 for (;;)
1179                 {
1180                         c = *infostring++;
1181
1182                         if (c == '\0')
1183                                 return NULL;
1184                         if (c == '\\' || key_ind == sizeof (crt_key) - 1)
1185                         {
1186                                 crt_key[key_ind] = '\0';
1187                                 break;
1188                         }
1189
1190                         crt_key[key_ind++] = c;
1191                 }
1192
1193                 // If it's the key we are looking for, save it in "value"
1194                 if (!strcmp(crt_key, key))
1195                 {
1196                         for (;;)
1197                         {
1198                                 c = *infostring++;
1199
1200                                 if (c == '\0' || c == '\\' || value_ind == sizeof (value) - 1)
1201                                 {
1202                                         value[value_ind] = '\0';
1203                                         return value;
1204                                 }
1205
1206                                 value[value_ind++] = c;
1207                         }
1208                 }
1209
1210                 // Else, skip the value
1211                 for (;;)
1212                 {
1213                         c = *infostring++;
1214
1215                         if (c == '\0')
1216                                 return NULL;
1217                         if (c == '\\')
1218                                 break;
1219                 }
1220         }
1221 }
1222
1223
1224 //========================================================
1225 // strlcat and strlcpy, from OpenBSD
1226
1227 /*
1228  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
1229  *
1230  * Permission to use, copy, modify, and distribute this software for any
1231  * purpose with or without fee is hereby granted, provided that the above
1232  * copyright notice and this permission notice appear in all copies.
1233  *
1234  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
1235  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1236  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
1237  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1238  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1239  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1240  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1241  */
1242
1243 /*      $OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $    */
1244 /*      $OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $     */
1245
1246
1247 #ifndef HAVE_STRLCAT
1248 size_t
1249 strlcat(char *dst, const char *src, size_t siz)
1250 {
1251         register char *d = dst;
1252         register const char *s = src;
1253         register size_t n = siz;
1254         size_t dlen;
1255
1256         /* Find the end of dst and adjust bytes left but don't go past end */
1257         while (n-- != 0 && *d != '\0')
1258                 d++;
1259         dlen = d - dst;
1260         n = siz - dlen;
1261
1262         if (n == 0)
1263                 return(dlen + strlen(s));
1264         while (*s != '\0') {
1265                 if (n != 1) {
1266                         *d++ = *s;
1267                         n--;
1268                 }
1269                 s++;
1270         }
1271         *d = '\0';
1272
1273         return(dlen + (s - src));       /* count does not include NUL */
1274 }
1275 #endif  // #ifndef HAVE_STRLCAT
1276
1277
1278 #ifndef HAVE_STRLCPY
1279 size_t
1280 strlcpy(char *dst, const char *src, size_t siz)
1281 {
1282         register char *d = dst;
1283         register const char *s = src;
1284         register size_t n = siz;
1285
1286         /* Copy as many bytes as will fit */
1287         if (n != 0 && --n != 0) {
1288                 do {
1289                         if ((*d++ = *s++) == 0)
1290                                 break;
1291                 } while (--n != 0);
1292         }
1293
1294         /* Not enough room in dst, add NUL and traverse rest of src */
1295         if (n == 0) {
1296                 if (siz != 0)
1297                         *d = '\0';              /* NUL-terminate dst */
1298                 while (*s++)
1299                         ;
1300         }
1301
1302         return(s - src - 1);    /* count does not include NUL */
1303 }
1304
1305 #endif  // #ifndef HAVE_STRLCPY