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
  37 gamemode_t gamemode;
  38 const char *gamename;
  39 const char *gamedirname1;
  40 const char *gamedirname2;
  41 const char *gamescreenshotname;
  42 const char *gameuserdirname;
  43 char com_modname[MAX_OSPATH] = "";
  44
  45
  46 /*
  47 ============================================================================
  48
  49                                         BYTE ORDER FUNCTIONS
  50
  51 ============================================================================
  52 */
  53
  54 short   ShortSwap (short l)
  55 {
  56         unsigned char    b1,b2;
  57
  58         b1 = l&255;
  59         b2 = (l>>8)&255;
  60
  61         return (b1<<8) + b2;
  62 }
  63
  64 int    LongSwap (int l)
  65 {
  66         unsigned char    b1,b2,b3,b4;
  67
  68         b1 = l&255;
  69         b2 = (l>>8)&255;
  70         b3 = (l>>16)&255;
  71         b4 = (l>>24)&255;
  72
  73         return ((int)b1<<24) + ((int)b2<<16) + ((int)b3<<8) + b4;
  74 }
  75
  76 float FloatSwap (float f)
  77 {
  78         union
  79         {
  80                 float   f;
  81                 unsigned char    b[4];
  82         } dat1, dat2;
  83
  84
  85         dat1.f = f;
  86         dat2.b[0] = dat1.b[3];
  87         dat2.b[1] = dat1.b[2];
  88         dat2.b[2] = dat1.b[1];
  89         dat2.b[3] = dat1.b[0];
  90         return dat2.f;
  91 }
  92
  93
  94 // Extract integers from buffers
  95
  96 unsigned int BuffBigLong (const unsigned char *buffer)
  97 {
  98         return (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
  99 }
 100
 101 unsigned short BuffBigShort (const unsigned char *buffer)
 102 {
 103         return (buffer[0] << 8) | buffer[1];
 104 }
 105
 106 unsigned int BuffLittleLong (const unsigned char *buffer)
 107 {
 108         return (buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0];
 109 }
 110
 111 unsigned short BuffLittleShort (const unsigned char *buffer)
 112 {
 113         return (buffer[1] << 8) | buffer[0];
 114 }
 115
 116
 117 /*
 118 ============================================================================
 119
 120                                         CRC FUNCTIONS
 121
 122 ============================================================================
 123 */
 124
 125 // this is a 16 bit, non-reflected CRC using the polynomial 0x1021
 126 // and the initial and final xor values shown below...  in other words, the
 127 // CCITT standard CRC used by XMODEM
 128
 129 #define CRC_INIT_VALUE  0xffff
 130 #define CRC_XOR_VALUE   0x0000
 131
 132 static unsigned short crctable[256] =
 133 {
 134         0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
 135         0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
 136         0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
 137         0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
 138         0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
 139         0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
 140         0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
 141         0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
 142         0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
 143         0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
 144         0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
 145         0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
 146         0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
 147         0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
 148         0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
 149         0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
 150         0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
 151         0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
 152         0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
 153         0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
 154         0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
 155         0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
 156         0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
 157         0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
 158         0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
 159         0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
 160         0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
 161         0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
 162         0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
 163         0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
 164         0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
 165         0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
 166 };
 167
 168 unsigned short CRC_Block(const unsigned char *data, size_t size)
 169 {
 170         unsigned short crc = CRC_INIT_VALUE;
 171         while (size--)
 172                 crc = (crc << 8) ^ crctable[(crc >> 8) ^ (*data++)];
 173         return crc ^ CRC_XOR_VALUE;
 174 }
 175
 176 // QuakeWorld
 177 static unsigned char chktbl[1024 + 4] =
 178 {
 179         0x78,0xd2,0x94,0xe3,0x41,0xec,0xd6,0xd5,0xcb,0xfc,0xdb,0x8a,0x4b,0xcc,0x85,0x01,
 180         0x23,0xd2,0xe5,0xf2,0x29,0xa7,0x45,0x94,0x4a,0x62,0xe3,0xa5,0x6f,0x3f,0xe1,0x7a,
 181         0x64,0xed,0x5c,0x99,0x29,0x87,0xa8,0x78,0x59,0x0d,0xaa,0x0f,0x25,0x0a,0x5c,0x58,
 182         0xfb,0x00,0xa7,0xa8,0x8a,0x1d,0x86,0x80,0xc5,0x1f,0xd2,0x28,0x69,0x71,0x58,0xc3,
 183         0x51,0x90,0xe1,0xf8,0x6a,0xf3,0x8f,0xb0,0x68,0xdf,0x95,0x40,0x5c,0xe4,0x24,0x6b,
 184         0x29,0x19,0x71,0x3f,0x42,0x63,0x6c,0x48,0xe7,0xad,0xa8,0x4b,0x91,0x8f,0x42,0x36,
 185         0x34,0xe7,0x32,0x55,0x59,0x2d,0x36,0x38,0x38,0x59,0x9b,0x08,0x16,0x4d,0x8d,0xf8,
 186         0x0a,0xa4,0x52,0x01,0xbb,0x52,0xa9,0xfd,0x40,0x18,0x97,0x37,0xff,0xc9,0x82,0x27,
 187         0xb2,0x64,0x60,0xce,0x00,0xd9,0x04,0xf0,0x9e,0x99,0xbd,0xce,0x8f,0x90,0x4a,0xdd,
 188         0xe1,0xec,0x19,0x14,0xb1,0xfb,0xca,0x1e,0x98,0x0f,0xd4,0xcb,0x80,0xd6,0x05,0x63,
 189         0xfd,0xa0,0x74,0xa6,0x86,0xf6,0x19,0x98,0x76,0x27,0x68,0xf7,0xe9,0x09,0x9a,0xf2,
 190         0x2e,0x42,0xe1,0xbe,0x64,0x48,0x2a,0x74,0x30,0xbb,0x07,0xcc,0x1f,0xd4,0x91,0x9d,
 191         0xac,0x55,0x53,0x25,0xb9,0x64,0xf7,0x58,0x4c,0x34,0x16,0xbc,0xf6,0x12,0x2b,0x65,
 192         0x68,0x25,0x2e,0x29,0x1f,0xbb,0xb9,0xee,0x6d,0x0c,0x8e,0xbb,0xd2,0x5f,0x1d,0x8f,
 193         0xc1,0x39,0xf9,0x8d,0xc0,0x39,0x75,0xcf,0x25,0x17,0xbe,0x96,0xaf,0x98,0x9f,0x5f,
 194         0x65,0x15,0xc4,0x62,0xf8,0x55,0xfc,0xab,0x54,0xcf,0xdc,0x14,0x06,0xc8,0xfc,0x42,
 195         0xd3,0xf0,0xad,0x10,0x08,0xcd,0xd4,0x11,0xbb,0xca,0x67,0xc6,0x48,0x5f,0x9d,0x59,
 196         0xe3,0xe8,0x53,0x67,0x27,0x2d,0x34,0x9e,0x9e,0x24,0x29,0xdb,0x69,0x99,0x86,0xf9,
 197         0x20,0xb5,0xbb,0x5b,0xb0,0xf9,0xc3,0x67,0xad,0x1c,0x9c,0xf7,0xcc,0xef,0xce,0x69,
 198         0xe0,0x26,0x8f,0x79,0xbd,0xca,0x10,0x17,0xda,0xa9,0x88,0x57,0x9b,0x15,0x24,0xba,
 199         0x84,0xd0,0xeb,0x4d,0x14,0xf5,0xfc,0xe6,0x51,0x6c,0x6f,0x64,0x6b,0x73,0xec,0x85,
 200         0xf1,0x6f,0xe1,0x67,0x25,0x10,0x77,0x32,0x9e,0x85,0x6e,0x69,0xb1,0x83,0x00,0xe4,
 201         0x13,0xa4,0x45,0x34,0x3b,0x40,0xff,0x41,0x82,0x89,0x79,0x57,0xfd,0xd2,0x8e,0xe8,
 202         0xfc,0x1d,0x19,0x21,0x12,0x00,0xd7,0x66,0xe5,0xc7,0x10,0x1d,0xcb,0x75,0xe8,0xfa,
 203         0xb6,0xee,0x7b,0x2f,0x1a,0x25,0x24,0xb9,0x9f,0x1d,0x78,0xfb,0x84,0xd0,0x17,0x05,
 204         0x71,0xb3,0xc8,0x18,0xff,0x62,0xee,0xed,0x53,0xab,0x78,0xd3,0x65,0x2d,0xbb,0xc7,
 205         0xc1,0xe7,0x70,0xa2,0x43,0x2c,0x7c,0xc7,0x16,0x04,0xd2,0x45,0xd5,0x6b,0x6c,0x7a,
 206         0x5e,0xa1,0x50,0x2e,0x31,0x5b,0xcc,0xe8,0x65,0x8b,0x16,0x85,0xbf,0x82,0x83,0xfb,
 207         0xde,0x9f,0x36,0x48,0x32,0x79,0xd6,0x9b,0xfb,0x52,0x45,0xbf,0x43,0xf7,0x0b,0x0b,
 208         0x19,0x19,0x31,0xc3,0x85,0xec,0x1d,0x8c,0x20,0xf0,0x3a,0xfa,0x80,0x4d,0x2c,0x7d,
 209         0xac,0x60,0x09,0xc0,0x40,0xee,0xb9,0xeb,0x13,0x5b,0xe8,0x2b,0xb1,0x20,0xf0,0xce,
 210         0x4c,0xbd,0xc6,0x04,0x86,0x70,0xc6,0x33,0xc3,0x15,0x0f,0x65,0x19,0xfd,0xc2,0xd3,
 211
 212         // map checksum goes here
 213         0x00,0x00,0x00,0x00
 214 };
 215
 216 // QuakeWorld
 217 unsigned char COM_BlockSequenceCRCByteQW(unsigned char *base, int length, int sequence)
 218 {
 219         unsigned char *p;
 220         unsigned char chkb[60 + 4];
 221
 222         p = chktbl + (sequence % (sizeof(chktbl) - 8));
 223
 224         if (length > 60)
 225                 length = 60;
 226         memcpy(chkb, base, length);
 227
 228         chkb[length] = (sequence & 0xff) ^ p[0];
 229         chkb[length+1] = p[1];
 230         chkb[length+2] = ((sequence>>8) & 0xff) ^ p[2];
 231         chkb[length+3] = p[3];
 232
 233         return CRC_Block(chkb, length + 4) & 0xff;
 234 }
 235
 236 /*
 237 ==============================================================================
 238
 239                         MESSAGE IO FUNCTIONS
 240
 241 Handles byte ordering and avoids alignment errors
 242 ==============================================================================
 243 */
 244
 245 //
 246 // writing functions
 247 //
 248
 249 void MSG_WriteChar (sizebuf_t *sb, int c)
 250 {
 251         unsigned char    *buf;
 252
 253         buf = SZ_GetSpace (sb, 1);
 254         buf[0] = c;
 255 }
 256
 257 void MSG_WriteByte (sizebuf_t *sb, int c)
 258 {
 259         unsigned char    *buf;
 260
 261         buf = SZ_GetSpace (sb, 1);
 262         buf[0] = c;
 263 }
 264
 265 void MSG_WriteShort (sizebuf_t *sb, int c)
 266 {
 267         unsigned char    *buf;
 268
 269         buf = SZ_GetSpace (sb, 2);
 270         buf[0] = c&0xff;
 271         buf[1] = c>>8;
 272 }
 273
 274 void MSG_WriteLong (sizebuf_t *sb, int c)
 275 {
 276         unsigned char    *buf;
 277
 278         buf = SZ_GetSpace (sb, 4);
 279         buf[0] = c&0xff;
 280         buf[1] = (c>>8)&0xff;
 281         buf[2] = (c>>16)&0xff;
 282         buf[3] = c>>24;
 283 }
 284
 285 void MSG_WriteFloat (sizebuf_t *sb, float f)
 286 {
 287         union
 288         {
 289                 float   f;
 290                 int     l;
 291         } dat;
 292
 293
 294         dat.f = f;
 295         dat.l = LittleLong (dat.l);
 296
 297         SZ_Write (sb, (unsigned char *)&dat.l, 4);
 298 }
 299
 300 void MSG_WriteString (sizebuf_t *sb, const char *s)
 301 {
 302         if (!s || !*s)
 303                 MSG_WriteChar (sb, 0);
 304         else
 305                 SZ_Write (sb, (unsigned char *)s, (int)strlen(s)+1);
 306 }
 307
 308 void MSG_WriteUnterminatedString (sizebuf_t *sb, const char *s)
 309 {
 310         if (s && *s)
 311                 SZ_Write (sb, (unsigned char *)s, (int)strlen(s));
 312 }
 313
 314 void MSG_WriteCoord13i (sizebuf_t *sb, float f)
 315 {
 316         if (f >= 0)
 317                 MSG_WriteShort (sb, (int)(f * 8.0 + 0.5));
 318         else
 319                 MSG_WriteShort (sb, (int)(f * 8.0 - 0.5));
 320 }
 321
 322 void MSG_WriteCoord16i (sizebuf_t *sb, float f)
 323 {
 324         if (f >= 0)
 325                 MSG_WriteShort (sb, (int)(f + 0.5));
 326         else
 327                 MSG_WriteShort (sb, (int)(f - 0.5));
 328 }
 329
 330 void MSG_WriteCoord32f (sizebuf_t *sb, float f)
 331 {
 332         MSG_WriteFloat (sb, f);
 333 }
 334
 335 void MSG_WriteCoord (sizebuf_t *sb, float f, protocolversion_t protocol)
 336 {
 337         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_QUAKEWORLD)
 338                 MSG_WriteCoord13i (sb, f);
 339         else if (protocol == PROTOCOL_DARKPLACES1)
 340                 MSG_WriteCoord32f (sb, f);
 341         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
 342                 MSG_WriteCoord16i (sb, f);
 343         else
 344                 MSG_WriteCoord32f (sb, f);
 345 }
 346
 347 void MSG_WriteVector (sizebuf_t *sb, float *v, protocolversion_t protocol)
 348 {
 349         MSG_WriteCoord (sb, v[0], protocol);
 350         MSG_WriteCoord (sb, v[1], protocol);
 351         MSG_WriteCoord (sb, v[2], protocol);
 352 }
 353
 354 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
 355 void MSG_WriteAngle8i (sizebuf_t *sb, float f)
 356 {
 357         if (f >= 0)
 358                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) + 0.5) & 255);
 359         else
 360                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) - 0.5) & 255);
 361 }
 362
 363 void MSG_WriteAngle16i (sizebuf_t *sb, float f)
 364 {
 365         if (f >= 0)
 366                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) + 0.5) & 65535);
 367         else
 368                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) - 0.5) & 65535);
 369 }
 370
 371 void MSG_WriteAngle32f (sizebuf_t *sb, float f)
 372 {
 373         MSG_WriteFloat (sb, f);
 374 }
 375
 376 void MSG_WriteAngle (sizebuf_t *sb, float f, protocolversion_t protocol)
 377 {
 378         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4 || protocol == PROTOCOL_QUAKEWORLD)
 379                 MSG_WriteAngle8i (sb, f);
 380         else
 381                 MSG_WriteAngle16i (sb, f);
 382 }
 383
 384 //
 385 // reading functions
 386 //
 387 int msg_readcount;
 388 qboolean msg_badread;
 389
 390 void MSG_BeginReading (void)
 391 {
 392         msg_readcount = 0;
 393         msg_badread = false;
 394 }
 395
 396 int MSG_ReadLittleShort (void)
 397 {
 398         if (msg_readcount+2 > net_message.cursize)
 399         {
 400                 msg_badread = true;
 401                 return -1;
 402         }
 403         msg_readcount += 2;
 404         return (short)(net_message.data[msg_readcount-2] | (net_message.data[msg_readcount-1]<<8));
 405 }
 406
 407 int MSG_ReadBigShort (void)
 408 {
 409         if (msg_readcount+2 > net_message.cursize)
 410         {
 411                 msg_badread = true;
 412                 return -1;
 413         }
 414         msg_readcount += 2;
 415         return (short)((net_message.data[msg_readcount-2]<<8) + net_message.data[msg_readcount-1]);
 416 }
 417
 418 int MSG_ReadLittleLong (void)
 419 {
 420         if (msg_readcount+4 > net_message.cursize)
 421         {
 422                 msg_badread = true;
 423                 return -1;
 424         }
 425         msg_readcount += 4;
 426         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);
 427 }
 428
 429 int MSG_ReadBigLong (void)
 430 {
 431         if (msg_readcount+4 > net_message.cursize)
 432         {
 433                 msg_badread = true;
 434                 return -1;
 435         }
 436         msg_readcount += 4;
 437         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];
 438 }
 439
 440 float MSG_ReadLittleFloat (void)
 441 {
 442         union
 443         {
 444                 float f;
 445                 int l;
 446         } dat;
 447         if (msg_readcount+4 > net_message.cursize)
 448         {
 449                 msg_badread = true;
 450                 return -1;
 451         }
 452         msg_readcount += 4;
 453         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);
 454         return dat.f;
 455 }
 456
 457 float MSG_ReadBigFloat (void)
 458 {
 459         union
 460         {
 461                 float f;
 462                 int l;
 463         } dat;
 464         if (msg_readcount+4 > net_message.cursize)
 465         {
 466                 msg_badread = true;
 467                 return -1;
 468         }
 469         msg_readcount += 4;
 470         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];
 471         return dat.f;
 472 }
 473
 474 char *MSG_ReadString (void)
 475 {
 476         static char string[MAX_INPUTLINE];
 477         int l,c;
 478         for (l = 0;l < (int) sizeof(string) - 1 && (c = MSG_ReadByte()) != -1 && c != 0;l++)
 479                 string[l] = c;
 480         string[l] = 0;
 481         return string;
 482 }
 483
 484 int MSG_ReadBytes (int numbytes, unsigned char *out)
 485 {
 486         int l, c;
 487         for (l = 0;l < numbytes && (c = MSG_ReadByte()) != -1;l++)
 488                 out[l] = c;
 489         return l;
 490 }
 491
 492 float MSG_ReadCoord13i (void)
 493 {
 494         return MSG_ReadLittleShort() * (1.0/8.0);
 495 }
 496
 497 float MSG_ReadCoord16i (void)
 498 {
 499         return (signed short) MSG_ReadLittleShort();
 500 }
 501
 502 float MSG_ReadCoord32f (void)
 503 {
 504         return MSG_ReadLittleFloat();
 505 }
 506
 507 float MSG_ReadCoord (protocolversion_t protocol)
 508 {
 509         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_QUAKEWORLD)
 510                 return MSG_ReadCoord13i();
 511         else if (protocol == PROTOCOL_DARKPLACES1)
 512                 return MSG_ReadCoord32f();
 513         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
 514                 return MSG_ReadCoord16i();
 515         else
 516                 return MSG_ReadCoord32f();
 517 }
 518
 519 void MSG_ReadVector (float *v, protocolversion_t protocol)
 520 {
 521         v[0] = MSG_ReadCoord(protocol);
 522         v[1] = MSG_ReadCoord(protocol);
 523         v[2] = MSG_ReadCoord(protocol);
 524 }
 525
 526 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
 527 float MSG_ReadAngle8i (void)
 528 {
 529         return (signed char) MSG_ReadByte () * (360.0/256.0);
 530 }
 531
 532 float MSG_ReadAngle16i (void)
 533 {
 534         return (signed short)MSG_ReadShort () * (360.0/65536.0);
 535 }
 536
 537 float MSG_ReadAngle32f (void)
 538 {
 539         return MSG_ReadFloat ();
 540 }
 541
 542 float MSG_ReadAngle (protocolversion_t protocol)
 543 {
 544         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4 || protocol == PROTOCOL_QUAKEWORLD)
 545                 return MSG_ReadAngle8i ();
 546         else
 547                 return MSG_ReadAngle16i ();
 548 }
 549
 550
 551 //===========================================================================
 552
 553 void SZ_Clear (sizebuf_t *buf)
 554 {
 555         buf->cursize = 0;
 556 }
 557
 558 unsigned char *SZ_GetSpace (sizebuf_t *buf, int length)
 559 {
 560         unsigned char *data;
 561
 562         if (buf->cursize + length > buf->maxsize)
 563         {
 564                 if (!buf->allowoverflow)
 565                         Host_Error ("SZ_GetSpace: overflow without allowoverflow set");
 566
 567                 if (length > buf->maxsize)
 568                         Host_Error ("SZ_GetSpace: %i is > full buffer size", length);
 569
 570                 buf->overflowed = true;
 571                 Con_Print("SZ_GetSpace: overflow\n");
 572                 SZ_Clear (buf);
 573         }
 574
 575         data = buf->data + buf->cursize;
 576         buf->cursize += length;
 577
 578         return data;
 579 }
 580
 581 void SZ_Write (sizebuf_t *buf, const unsigned char *data, int length)
 582 {
 583         memcpy (SZ_GetSpace(buf,length),data,length);
 584 }
 585
 586 // LordHavoc: thanks to Fuh for bringing the pure evil of SZ_Print to my
 587 // attention, it has been eradicated from here, its only (former) use in
 588 // all of darkplaces.
 589
 590 static char *hexchar = "0123456789ABCDEF";
 591 void Com_HexDumpToConsole(const unsigned char *data, int size)
 592 {
 593         int i, j, n;
 594         char text[1024];
 595         char *cur, *flushpointer;
 596         const unsigned char *d;
 597         cur = text;
 598         flushpointer = text + 512;
 599         for (i = 0;i < size;)
 600         {
 601                 n = 16;
 602                 if (n > size - i)
 603                         n = size - i;
 604                 d = data + i;
 605                 // print offset
 606                 *cur++ = hexchar[(i >> 12) & 15];
 607                 *cur++ = hexchar[(i >>  8) & 15];
 608                 *cur++ = hexchar[(i >>  4) & 15];
 609                 *cur++ = hexchar[(i >>  0) & 15];
 610                 *cur++ = ':';
 611                 // print hex
 612                 for (j = 0;j < 16;j++)
 613                 {
 614                         if (j < n)
 615                         {
 616                                 *cur++ = hexchar[(d[j] >> 4) & 15];
 617                                 *cur++ = hexchar[(d[j] >> 0) & 15];
 618                         }
 619                         else
 620                         {
 621                                 *cur++ = ' ';
 622                                 *cur++ = ' ';
 623                         }
 624                         if ((j & 3) == 3)
 625                                 *cur++ = ' ';
 626                 }
 627                 // print text
 628                 for (j = 0;j < 16;j++)
 629                 {
 630                         if (j < n)
 631                         {
 632                                 // color change prefix character has to be treated specially
 633                                 if (d[j] == STRING_COLOR_TAG)
 634                                 {
 635                                         *cur++ = STRING_COLOR_TAG;
 636                                         *cur++ = STRING_COLOR_TAG;
 637                                 }
 638                                 else if (d[j] >= ' ')
 639                                         *cur++ = d[j];
 640                                 else
 641                                         *cur++ = '.';
 642                         }
 643                         else
 644                                 *cur++ = ' ';
 645                 }
 646                 *cur++ = '\n';
 647                 i += n;
 648                 if (cur >= flushpointer || i >= size)
 649                 {
 650                         *cur++ = 0;
 651                         Con_Print(text);
 652                         cur = text;
 653                 }
 654         }
 655 }
 656
 657 void SZ_HexDumpToConsole(const sizebuf_t *buf)
 658 {
 659         Com_HexDumpToConsole(buf->data, buf->cursize);
 660 }
 661
 662
 663 //============================================================================
 664
 665
 666 /*
 667 ==============
 668 COM_ParseToken
 669
 670 Parse a token out of a string
 671 ==============
 672 */
 673 int COM_ParseToken(const char **datapointer, int returnnewline)
 674 {
 675         int len;
 676         int c;
 677         const char *data = *datapointer;
 678
 679         len = 0;
 680         com_token[0] = 0;
 681
 682         if (!data)
 683         {
 684                 *datapointer = NULL;
 685                 return false;
 686         }
 687
 688 // skip whitespace
 689 skipwhite:
 690         // line endings:
 691         // UNIX: \n
 692         // Mac: \r
 693         // Windows: \r\n
 694         for (;*data <= ' ' && ((*data != '\n' && *data != '\r') || !returnnewline);data++)
 695         {
 696                 if (*data == 0)
 697                 {
 698                         // end of file
 699                         *datapointer = NULL;
 700                         return false;
 701                 }
 702         }
 703
 704         // handle Windows line ending
 705         if (data[0] == '\r' && data[1] == '\n')
 706                 data++;
 707
 708         if (data[0] == '/' && data[1] == '/')
 709         {
 710                 // comment
 711                 while (*data && *data != '\n' && *data != '\r')
 712                         data++;
 713                 goto skipwhite;
 714         }
 715         else if (data[0] == '/' && data[1] == '*')
 716         {
 717                 // comment
 718                 data++;
 719                 while (*data && (data[0] != '*' || data[1] != '/'))
 720                         data++;
 721                 data += 2;
 722                 goto skipwhite;
 723         }
 724         else if (*data == '\"')
 725         {
 726                 // quoted string
 727                 for (data++;*data != '\"';data++)
 728                 {
 729                         if (!*data || len >= (int)sizeof(com_token) - 1)
 730                         {
 731                                 com_token[0] = 0;
 732                                 *datapointer = NULL;
 733                                 return false;
 734                         }
 735                         c = *data;
 736                         if (*data == '\\')
 737                         {
 738                                 if (data[1] == '"')
 739                                 {
 740                                         data++;
 741                                         c = *data;
 742                                 }
 743                                 else if (data[1] == '\'')
 744                                 {
 745                                         data++;
 746                                         c = *data;
 747                                 }
 748                                 else if (data[1] == 'n')
 749                                 {
 750                                         data++;
 751                                         c = '\n';
 752                                 }
 753                                 else if (data[1] == '\\')
 754                                         data++;
 755                         }
 756                         com_token[len++] = c;
 757                 }
 758                 com_token[len] = 0;
 759                 *datapointer = data+1;
 760                 return true;
 761         }
 762         else if (*data == '\'')
 763         {
 764                 // quoted string
 765                 for (data++;*data != '\'';data++)
 766                 {
 767                         if (!*data || len >= (int)sizeof(com_token) - 1)
 768                         {
 769                                 com_token[0] = 0;
 770                                 *datapointer = NULL;
 771                                 return false;
 772                         }
 773                         c = *data;
 774                         if (*data == '\\')
 775                         {
 776                                 if (data[1] == '"')
 777                                 {
 778                                         data++;
 779                                         c = *data;
 780                                 }
 781                                 else if (data[1] == '\'')
 782                                 {
 783                                         data++;
 784                                         c = *data;
 785                                 }
 786                                 else if (data[1] == 'n')
 787                                 {
 788                                         data++;
 789                                         c = '\n';
 790                                 }
 791                                 else if (data[1] == '\\')
 792                                         data++;
 793                         }
 794                         com_token[len++] = c;
 795                 }
 796                 com_token[len] = 0;
 797                 *datapointer = data+1;
 798                 return true;
 799         }
 800         else if (*data == '\r')
 801         {
 802                 // translate Mac line ending to UNIX
 803                 com_token[len++] = '\n';
 804                 com_token[len] = 0;
 805                 *datapointer = data;
 806                 return true;
 807         }
 808         else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == '\'' || *data == ':' || *data == ',' || *data == ';')
 809         {
 810                 // single character
 811                 com_token[len++] = *data++;
 812                 com_token[len] = 0;
 813                 *datapointer = data;
 814                 return true;
 815         }
 816         else
 817         {
 818                 // regular word
 819                 for (;*data > ' ' && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != '\'' && *data != ':' && *data != ',' && *data != ';' && *data != '\'' && *data != '"';data++)
 820                 {
 821                         if (len >= (int)sizeof(com_token) - 1)
 822                         {
 823                                 com_token[0] = 0;
 824                                 *datapointer = NULL;
 825                                 return false;
 826                         }
 827                         c = *data;
 828                         if (*data == '\\')
 829                         {
 830                                 if (data[1] == '"')
 831                                 {
 832                                         data++;
 833                                         c = *data;
 834                                 }
 835                                 else if (data[1] == '\'')
 836                                 {
 837                                         data++;
 838                                         c = *data;
 839                                 }
 840                                 else if (data[1] == 'n')
 841                                 {
 842                                         data++;
 843                                         c = '\n';
 844                                 }
 845                                 else if (data[1] == '\\')
 846                                         data++;
 847                         }
 848                         com_token[len++] = c;
 849                 }
 850                 com_token[len] = 0;
 851                 *datapointer = data;
 852                 return true;
 853         }
 854 }
 855
 856 /*
 857 ==============
 858 COM_ParseTokenConsole
 859
 860 Parse a token out of a string, behaving like the qwcl console
 861 ==============
 862 */
 863 int COM_ParseTokenConsole(const char **datapointer)
 864 {
 865         int len;
 866         int c;
 867         const char *data = *datapointer;
 868
 869         len = 0;
 870         com_token[0] = 0;
 871
 872         if (!data)
 873         {
 874                 *datapointer = NULL;
 875                 return false;
 876         }
 877
 878 // skip whitespace
 879 skipwhite:
 880         for (;*data <= ' ';data++)
 881         {
 882                 if (*data == 0)
 883                 {
 884                         // end of file
 885                         *datapointer = NULL;
 886                         return false;
 887                 }
 888         }
 889
 890         if (*data == '/' && data[1] == '/')
 891         {
 892                 // comment
 893                 while (*data && *data != '\n' && *data != '\r')
 894                         data++;
 895                 goto skipwhite;
 896         }
 897         else if (*data == '\"')
 898         {
 899                 // quoted string
 900                 for (data++;*data != '\"';data++)
 901                 {
 902                         if (!*data || len >= (int)sizeof(com_token) - 1)
 903                         {
 904                                 com_token[0] = 0;
 905                                 *datapointer = NULL;
 906                                 return false;
 907                         }
 908                         c = *data;
 909                         if (*data == '\\')
 910                         {
 911                                 if (data[1] == '"')
 912                                 {
 913                                         data++;
 914                                         c = *data;
 915                                 }
 916                                 else if (data[1] == '\'')
 917                                 {
 918                                         data++;
 919                                         c = *data;
 920                                 }
 921                                 else if (data[1] == 'n')
 922                                 {
 923                                         data++;
 924                                         c = '\n';
 925                                 }
 926                                 else if (data[1] == '\\')
 927                                         data++;
 928                         }
 929                         com_token[len++] = c;
 930                 }
 931                 com_token[len] = 0;
 932                 *datapointer = data+1;
 933         }
 934         else
 935         {
 936                 // regular word
 937                 for (;*data > ' ';data++)
 938                 {
 939                         if (len >= (int)sizeof(com_token) - 1)
 940                         {
 941                                 com_token[0] = 0;
 942                                 *datapointer = NULL;
 943                                 return false;
 944                         }
 945                         c = *data;
 946                         if (*data == '\\')
 947                         {
 948                                 if (data[1] == '"')
 949                                 {
 950                                         data++;
 951                                         c = *data;
 952                                 }
 953                                 else if (data[1] == '\'')
 954                                 {
 955                                         data++;
 956                                         c = *data;
 957                                 }
 958                                 else if (data[1] == 'n')
 959                                 {
 960                                         data++;
 961                                         c = '\n';
 962                                 }
 963                                 else if (data[1] == '\\')
 964                                         data++;
 965                         }
 966                         com_token[len++] = c;
 967                 }
 968                 com_token[len] = 0;
 969                 *datapointer = data;
 970         }
 971
 972         return true;
 973 }
 974
 975
 976 /*
 977 ================
 978 COM_CheckParm
 979
 980 Returns the position (1 to argc-1) in the program's argument list
 981 where the given parameter apears, or 0 if not present
 982 ================
 983 */
 984 int COM_CheckParm (const char *parm)
 985 {
 986         int i;
 987
 988         for (i=1 ; i<com_argc ; i++)
 989         {
 990                 if (!com_argv[i])
 991                         continue;               // NEXTSTEP sometimes clears appkit vars.
 992                 if (!strcmp (parm,com_argv[i]))
 993                         return i;
 994         }
 995
 996         return 0;
 997 }
 998
 999 //===========================================================================
1000
1001 // Game mods
1002
1003 typedef struct gamemode_info_s
1004 {
1005         const char* prog_name;
1006         const char* cmdline;
1007         const char* gamename;
1008         const char* gamedirname1;
1009         const char* gamedirname2;
1010         const char* gamescreenshotname;
1011         const char* gameuserdirname;
1012 } gamemode_info_t;
1013
1014 static const gamemode_info_t gamemode_info [] =
1015 {// prog_name           cmdline                 gamename                                gamedirname     gamescreenshotname
1016
1017 // GAME_NORMAL
1018 // COMMANDLINEOPTION: Game: -quake runs the game Quake (default)
1019 { "",                           "-quake",               "DarkPlaces-Quake",             "id1",          NULL,                   "dp",                   "darkplaces" },
1020 // GAME_HIPNOTIC
1021 // COMMANDLINEOPTION: Game: -hipnotic runs Quake mission pack 1: The Scourge of Armagon
1022 { "hipnotic",           "-hipnotic",    "Darkplaces-Hipnotic",  "id1",          "hipnotic",             "dp",                   "darkplaces" },
1023 // GAME_ROGUE
1024 // COMMANDLINEOPTION: Game: -rogue runs Quake mission pack 2: The Dissolution of Eternity
1025 { "rogue",                      "-rogue",               "Darkplaces-Rogue",             "id1",          "rogue",                "dp",                   "darkplaces" },
1026 // GAME_NEHAHRA
1027 // COMMANDLINEOPTION: Game: -nehahra runs The Seal of Nehahra movie and game
1028 { "nehahra",            "-nehahra",             "DarkPlaces-Nehahra",   "id1",          "nehahra",              "dp",                   "darkplaces" },
1029 // GAME_NEXUIZ
1030 // COMMANDLINEOPTION: Game: -nexuiz runs the multiplayer game Nexuiz
1031 { "nexuiz",                     "-nexuiz",              "Nexuiz",                               "data",         NULL,                   "nexuiz",               "nexuiz" },
1032 // GAME_TRANSFUSION
1033 // COMMANDLINEOPTION: Game: -transfusion runs Transfusion (the recreation of Blood in Quake)
1034 { "transfusion",        "-transfusion", "Transfusion",                  "basetf",       NULL,                   "transfusion",  "transfusion" },
1035 // GAME_GOODVSBAD2
1036 // COMMANDLINEOPTION: Game: -goodvsbad2 runs the psychadelic RTS FPS game Good Vs Bad 2
1037 { "gvb2",                       "-goodvsbad2",  "GoodVs.Bad2",                  "rts",          NULL,                   "gvb2",                 "gvb2" },
1038 // GAME_TEU
1039 // COMMANDLINEOPTION: Game: -teu runs The Evil Unleashed (this option is obsolete as they are not using darkplaces)
1040 { "teu",                        "-teu",                 "TheEvilUnleashed",             "baseteu",      NULL,                   "teu",                  "teu" },
1041 // GAME_BATTLEMECH
1042 // COMMANDLINEOPTION: Game: -battlemech runs the multiplayer topdown deathmatch game BattleMech
1043 { "battlemech",         "-battlemech",  "Battlemech",                   "base",         NULL,                   "battlemech",   "battlemech" },
1044 // GAME_ZYMOTIC
1045 // COMMANDLINEOPTION: Game: -zymotic runs the singleplayer game Zymotic
1046 { "zymotic",            "-zymotic",             "Zymotic",                              "basezym",              NULL,                   "zymotic",              "zymotic" },
1047 // GAME_SETHERAL
1048 // COMMANDLINEOPTION: Game: -setheral runs the multiplayer game Setheral
1049 { "setheral",           "-setheral",    "Setheral",                             "data",         NULL,                   "setheral",             "setheral" },
1050 // GAME_SOM
1051 // COMMANDLINEOPTION: Game: -som runs the multiplayer game Son Of Man
1052 { "som",                        "-som",                 "Son of Man",                   "id1",          "sonofman",             "som",                  "darkplaces" },
1053 // GAME_TENEBRAE
1054 // COMMANDLINEOPTION: Game: -tenebrae runs the graphics test mod known as Tenebrae (some features not implemented)
1055 { "tenebrae",           "-tenebrae",    "DarkPlaces-Tenebrae",  "id1",          "tenebrae",             "dp",                   "darkplaces" },
1056 // GAME_NEOTERIC
1057 // COMMANDLINEOPTION: Game: -neoteric runs the game Neoteric
1058 { "neoteric",           "-neoteric",    "Neoteric",                             "id1",          "neobase",              "neo",                  "darkplaces" },
1059 // GAME_OPENQUARTZ
1060 // COMMANDLINEOPTION: Game: -openquartz runs the game OpenQuartz, a standalone GPL replacement of the quake content
1061 { "openquartz",         "-openquartz",  "OpenQuartz",                   "id1",          NULL,                   "openquartz",   "darkplaces" },
1062 // GAME_PRYDON
1063 // COMMANDLINEOPTION: Game: -prydon runs the topdown point and click action-RPG Prydon Gate
1064 { "prydon",                     "-prydon",              "PrydonGate",                   "id1",          "prydon",               "prydon",               "darkplaces" },
1065 // GAME_NETHERWORLD
1066 // COMMANDLINEOPTION: Game: -netherworld runs the game Netherworld: Dark Master
1067 { "netherworld",        "-netherworld", "Netherworld: Dark Master",     "id1",          "netherworld",  "nw",                   "darkplaces" },
1068 // GAME_THEHUNTED
1069 // COMMANDLINEOPTION: Game: -thehunted runs the game The Hunted
1070 { "thehunted",          "-thehunted",   "The Hunted",                   "thdata",       NULL,                   "th",                   "thehunted" },
1071 // GAME_DEFEATINDETAIL2
1072 // COMMANDLINEOPTION: Game: -did2 runs the game Defeat In Detail 2
1073 { "did2",                       "-did2",                "Defeat In Detail 2",   "data",         NULL,                   "did2_",                "did2" },
1074 // GAME_DARSANA
1075 // COMMANDLINEOPTION: Game: -darsana runs the game Darsana
1076 { "darsana",            "-darsana",     "Darsana",                      "ddata",        NULL,                   "darsana",                      "darsana" },
1077 // GAME_CONTAGIONTHEORY
1078 // COMMANDLINEOPTION: Game: -contagiontheory runs the game Contagion Theory
1079 { "contagiontheory",            "-contagiontheory",     "Contagion Theory",                     "ctdata",       NULL,                   "ct",                   "contagiontheory" },
1080 };
1081
1082 void COM_InitGameType (void)
1083 {
1084         char name [MAX_OSPATH];
1085         unsigned int i;
1086
1087         FS_StripExtension (com_argv[0], name, sizeof (name));
1088         COM_ToLowerString (name, name, sizeof (name));
1089
1090         // Check the binary name; default to GAME_NORMAL (0)
1091         gamemode = GAME_NORMAL;
1092         for (i = 1; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
1093                 if (strstr (name, gamemode_info[i].prog_name))
1094                 {
1095                         gamemode = (gamemode_t)i;
1096                         break;
1097                 }
1098
1099         // Look for a command-line option
1100         for (i = 0; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
1101                 if (COM_CheckParm (gamemode_info[i].cmdline))
1102                 {
1103                         gamemode = (gamemode_t)i;
1104                         break;
1105                 }
1106
1107         gamename = gamemode_info[gamemode].gamename;
1108         gamedirname1 = gamemode_info[gamemode].gamedirname1;
1109         gamedirname2 = gamemode_info[gamemode].gamedirname2;
1110         gamescreenshotname = gamemode_info[gamemode].gamescreenshotname;
1111         gameuserdirname = gamemode_info[gamemode].gameuserdirname;
1112 }
1113
1114
1115 /*
1116 ================
1117 COM_Init
1118 ================
1119 */
1120 void COM_Init_Commands (void)
1121 {
1122         int i, j, n;
1123         char com_cmdline[MAX_INPUTLINE];
1124
1125         Cvar_RegisterVariable (&registered);
1126         Cvar_RegisterVariable (&cmdline);
1127
1128         // reconstitute the command line for the cmdline externally visible cvar
1129         n = 0;
1130         for (j = 0;(j < MAX_NUM_ARGVS) && (j < com_argc);j++)
1131         {
1132                 i = 0;
1133                 if (strstr(com_argv[j], " "))
1134                 {
1135                         // arg contains whitespace, store quotes around it
1136                         com_cmdline[n++] = '\"';
1137                         while ((n < ((int)sizeof(com_cmdline) - 1)) && com_argv[j][i])
1138                                 com_cmdline[n++] = com_argv[j][i++];
1139                         com_cmdline[n++] = '\"';
1140                 }
1141                 else
1142                 {
1143                         while ((n < ((int)sizeof(com_cmdline) - 1)) && com_argv[j][i])
1144                                 com_cmdline[n++] = com_argv[j][i++];
1145                 }
1146                 if (n < ((int)sizeof(com_cmdline) - 1))
1147                         com_cmdline[n++] = ' ';
1148                 else
1149                         break;
1150         }
1151         com_cmdline[n] = 0;
1152         Cvar_Set ("cmdline", com_cmdline);
1153 }
1154
1155 /*
1156 ============
1157 va
1158
1159 does a varargs printf into a temp buffer, so I don't need to have
1160 varargs versions of all text functions.
1161 FIXME: make this buffer size safe someday
1162 ============
1163 */
1164 char *va(const char *format, ...)
1165 {
1166         va_list argptr;
1167         // LordHavoc: now cycles through 8 buffers to avoid problems in most cases
1168         static char string[8][1024], *s;
1169         static int stringindex = 0;
1170
1171         s = string[stringindex];
1172         stringindex = (stringindex + 1) & 7;
1173         va_start (argptr, format);
1174         dpvsnprintf (s, sizeof (string[0]), format,argptr);
1175         va_end (argptr);
1176
1177         return s;
1178 }
1179
1180
1181 //======================================
1182
1183 // snprintf and vsnprintf are NOT portable. Use their DP counterparts instead
1184
1185 #undef snprintf
1186 #undef vsnprintf
1187
1188 #ifdef WIN32
1189 # define snprintf _snprintf
1190 # define vsnprintf _vsnprintf
1191 #endif
1192
1193
1194 int dpsnprintf (char *buffer, size_t buffersize, const char *format, ...)
1195 {
1196         va_list args;
1197         int result;
1198
1199         va_start (args, format);
1200         result = dpvsnprintf (buffer, buffersize, format, args);
1201         va_end (args);
1202
1203         return result;
1204 }
1205
1206
1207 int dpvsnprintf (char *buffer, size_t buffersize, const char *format, va_list args)
1208 {
1209         int result;
1210
1211         result = vsnprintf (buffer, buffersize, format, args);
1212         if (result < 0 || (size_t)result >= buffersize)
1213         {
1214                 buffer[buffersize - 1] = '\0';
1215                 return -1;
1216         }
1217
1218         return result;
1219 }
1220
1221
1222 //======================================
1223
1224 void COM_ToLowerString (const char *in, char *out, size_t size_out)
1225 {
1226         if (size_out == 0)
1227                 return;
1228
1229         while (*in && size_out > 1)
1230         {
1231                 if (*in >= 'A' && *in <= 'Z')
1232                         *out++ = *in++ + 'a' - 'A';
1233                 else
1234                         *out++ = *in++;
1235                 size_out--;
1236         }
1237         *out = '\0';
1238 }
1239
1240 void COM_ToUpperString (const char *in, char *out, size_t size_out)
1241 {
1242         if (size_out == 0)
1243                 return;
1244
1245         while (*in && size_out > 1)
1246         {
1247                 if (*in >= 'a' && *in <= 'z')
1248                         *out++ = *in++ + 'A' - 'a';
1249                 else
1250                         *out++ = *in++;
1251                 size_out--;
1252         }
1253         *out = '\0';
1254 }
1255
1256 int COM_StringBeginsWith(const char *s, const char *match)
1257 {
1258         for (;*s && *match;s++, match++)
1259                 if (*s != *match)
1260                         return false;
1261         return true;
1262 }
1263
1264 int COM_ReadAndTokenizeLine(const char **text, char **argv, int maxargc, char *tokenbuf, int tokenbufsize, const char *commentprefix)
1265 {
1266         int argc, commentprefixlength;
1267         char *tokenbufend;
1268         const char *l;
1269         argc = 0;
1270         tokenbufend = tokenbuf + tokenbufsize;
1271         l = *text;
1272         commentprefixlength = 0;
1273         if (commentprefix)
1274                 commentprefixlength = (int)strlen(commentprefix);
1275         while (*l && *l != '\n' && *l != '\r')
1276         {
1277                 if (*l > ' ')
1278                 {
1279                         if (commentprefixlength && !strncmp(l, commentprefix, commentprefixlength))
1280                         {
1281                                 while (*l && *l != '\n' && *l != '\r')
1282                                         l++;
1283                                 break;
1284                         }
1285                         if (argc >= maxargc)
1286                                 return -1;
1287                         argv[argc++] = tokenbuf;
1288                         if (*l == '"')
1289                         {
1290                                 l++;
1291                                 while (*l && *l != '"')
1292                                 {
1293                                         if (tokenbuf >= tokenbufend)
1294                                                 return -1;
1295                                         *tokenbuf++ = *l++;
1296                                 }
1297                                 if (*l == '"')
1298                                         l++;
1299                         }
1300                         else
1301                         {
1302                                 while (*l > ' ')
1303                                 {
1304                                         if (tokenbuf >= tokenbufend)
1305                                                 return -1;
1306                                         *tokenbuf++ = *l++;
1307                                 }
1308                         }
1309                         if (tokenbuf >= tokenbufend)
1310                                 return -1;
1311                         *tokenbuf++ = 0;
1312                 }
1313                 else
1314                         l++;
1315         }
1316         // line endings:
1317         // UNIX: \n
1318         // Mac: \r
1319         // Windows: \r\n
1320         if (*l == '\r')
1321                 l++;
1322         if (*l == '\n')
1323                 l++;
1324         *text = l;
1325         return argc;
1326 }
1327
1328 // written by Elric, thanks Elric!
1329 char *SearchInfostring(const char *infostring, const char *key)
1330 {
1331         static char value [MAX_INPUTLINE];
1332         char crt_key [MAX_INPUTLINE];
1333         size_t value_ind, key_ind;
1334         char c;
1335
1336         if (*infostring++ != '\\')
1337                 return NULL;
1338
1339         value_ind = 0;
1340         for (;;)
1341         {
1342                 key_ind = 0;
1343
1344                 // Get the key name
1345                 for (;;)
1346                 {
1347                         c = *infostring++;
1348
1349                         if (c == '\0')
1350                                 return NULL;
1351                         if (c == '\\' || key_ind == sizeof (crt_key) - 1)
1352                         {
1353                                 crt_key[key_ind] = '\0';
1354                                 break;
1355                         }
1356
1357                         crt_key[key_ind++] = c;
1358                 }
1359
1360                 // If it's the key we are looking for, save it in "value"
1361                 if (!strcmp(crt_key, key))
1362                 {
1363                         for (;;)
1364                         {
1365                                 c = *infostring++;
1366
1367                                 if (c == '\0' || c == '\\' || value_ind == sizeof (value) - 1)
1368                                 {
1369                                         value[value_ind] = '\0';
1370                                         return value;
1371                                 }
1372
1373                                 value[value_ind++] = c;
1374                         }
1375                 }
1376
1377                 // Else, skip the value
1378                 for (;;)
1379                 {
1380                         c = *infostring++;
1381
1382                         if (c == '\0')
1383                                 return NULL;
1384                         if (c == '\\')
1385                                 break;
1386                 }
1387         }
1388 }
1389
1390 void InfoString_GetValue(const char *buffer, const char *key, char *value, size_t valuelength)
1391 {
1392         int pos = 0, j;
1393         size_t keylength;
1394         if (!key)
1395                 key = "";
1396         if (!value)
1397                 value = "";
1398         keylength = strlen(key);
1399         if (valuelength < 1 || !value)
1400         {
1401                 Con_Printf("InfoString_GetValue: no room in value\n");
1402                 return;
1403         }
1404         value[0] = 0;
1405         if (strchr(key, '\\'))
1406         {
1407                 Con_Printf("InfoString_GetValue: key name \"%s\" contains \\ which is not possible in an infostring\n", key);
1408                 return;
1409         }
1410         if (strchr(key, '\"'))
1411         {
1412                 Con_Printf("InfoString_SetValue: key name \"%s\" contains \" which is not allowed in an infostring\n", key);
1413                 return;
1414         }
1415         if (!key[0])
1416         {
1417                 Con_Printf("InfoString_GetValue: can not look up a key with no name\n");
1418                 return;
1419         }
1420         while (buffer[pos] == '\\')
1421         {
1422                 if (!memcmp(buffer + pos+1, key, keylength))
1423                 {
1424                         for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1425                         pos++;
1426                         for (j = 0;buffer[pos+j] && buffer[pos+j] != '\\' && j < (int)valuelength - 1;j++)
1427                                 value[j] = buffer[pos+j];
1428                         value[j] = 0;
1429                         return;
1430                 }
1431                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1432                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1433         }
1434         // if we reach this point the key was not found
1435 }
1436
1437 void InfoString_SetValue(char *buffer, size_t bufferlength, const char *key, const char *value)
1438 {
1439         int pos = 0, pos2;
1440         size_t keylength;
1441         if (!key)
1442                 key = "";
1443         if (!value)
1444                 value = "";
1445         keylength = strlen(key);
1446         if (strchr(key, '\\') || strchr(value, '\\'))
1447         {
1448                 Con_Printf("InfoString_SetValue: \"%s\" \"%s\" contains \\ which is not possible to store in an infostring\n", key, value);
1449                 return;
1450         }
1451         if (strchr(key, '\"') || strchr(value, '\"'))
1452         {
1453                 Con_Printf("InfoString_SetValue: \"%s\" \"%s\" contains \" which is not allowed in an infostring\n", key, value);
1454                 return;
1455         }
1456         if (!key[0])
1457         {
1458                 Con_Printf("InfoString_SetValue: can not set a key with no name\n");
1459                 return;
1460         }
1461         while (buffer[pos] == '\\')
1462         {
1463                 if (!memcmp(buffer + pos+1, key, keylength))
1464                         break;
1465                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1466                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1467         }
1468         // if we found the key, find the end of it because we will be replacing it
1469         pos2 = pos;
1470         if (buffer[pos] == '\\')
1471         {
1472                 for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
1473                 for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
1474         }
1475         if (bufferlength <= pos + 1 + strlen(key) + 1 + strlen(value) + strlen(buffer + pos2))
1476         {
1477                 Con_Printf("InfoString_SetValue: no room for \"%s\" \"%s\" in infostring\n", key, value);
1478                 return;
1479         }
1480         if (value && value[0])
1481         {
1482                 // set the key/value and append the remaining text
1483                 char tempbuffer[4096];
1484                 strlcpy(tempbuffer, buffer + pos2, sizeof(tempbuffer));
1485                 sprintf(buffer + pos, "\\%s\\%s%s", key, value, tempbuffer);
1486         }
1487         else
1488         {
1489                 // just remove the key from the text
1490                 strlcpy(buffer + pos, buffer + pos2, bufferlength - pos);
1491         }
1492 }
1493
1494 void InfoString_Print(char *buffer)
1495 {
1496         int i;
1497         char key[2048];
1498         char value[2048];
1499         while (*buffer)
1500         {
1501                 if (*buffer != '\\')
1502                 {
1503                         Con_Printf("InfoString_Print: corrupt string\n");
1504                         return;
1505                 }
1506                 for (buffer++, i = 0;*buffer && *buffer != '\\';buffer++)
1507                         if (i < (int)sizeof(key)-1)
1508                                 key[i++] = *buffer;
1509                 key[i] = 0;
1510                 if (*buffer != '\\')
1511                 {
1512                         Con_Printf("InfoString_Print: corrupt string\n");
1513                         return;
1514                 }
1515                 for (buffer++, i = 0;*buffer && *buffer != '\\';buffer++)
1516                         if (i < (int)sizeof(value)-1)
1517                                 value[i++] = *buffer;
1518                 value[i] = 0;
1519                 // empty value is an error case
1520                 Con_Printf("%20s %s\n", key, value[0] ? value : "NO VALUE");
1521         }
1522 }
1523
1524 //========================================================
1525 // strlcat and strlcpy, from OpenBSD
1526
1527 /*
1528  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
1529  *
1530  * Permission to use, copy, modify, and distribute this software for any
1531  * purpose with or without fee is hereby granted, provided that the above
1532  * copyright notice and this permission notice appear in all copies.
1533  *
1534  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
1535  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1536  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
1537  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1538  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1539  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1540  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1541  */
1542
1543 /*      $OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $    */
1544 /*      $OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $     */
1545
1546
1547 #ifndef HAVE_STRLCAT
1548 size_t
1549 strlcat(char *dst, const char *src, size_t siz)
1550 {
1551         register char *d = dst;
1552         register const char *s = src;
1553         register size_t n = siz;
1554         size_t dlen;
1555
1556         /* Find the end of dst and adjust bytes left but don't go past end */
1557         while (n-- != 0 && *d != '\0')
1558                 d++;
1559         dlen = d - dst;
1560         n = siz - dlen;
1561
1562         if (n == 0)
1563                 return(dlen + strlen(s));
1564         while (*s != '\0') {
1565                 if (n != 1) {
1566                         *d++ = *s;
1567                         n--;
1568                 }
1569                 s++;
1570         }
1571         *d = '\0';
1572
1573         return(dlen + (s - src));       /* count does not include NUL */
1574 }
1575 #endif  // #ifndef HAVE_STRLCAT
1576
1577
1578 #ifndef HAVE_STRLCPY
1579 size_t
1580 strlcpy(char *dst, const char *src, size_t siz)
1581 {
1582         register char *d = dst;
1583         register const char *s = src;
1584         register size_t n = siz;
1585
1586         /* Copy as many bytes as will fit */
1587         if (n != 0 && --n != 0) {
1588                 do {
1589                         if ((*d++ = *s++) == 0)
1590                                 break;
1591                 } while (--n != 0);
1592         }
1593
1594         /* Not enough room in dst, add NUL and traverse rest of src */
1595         if (n == 0) {
1596                 if (siz != 0)
1597                         *d = '\0';              /* NUL-terminate dst */
1598                 while (*s++)
1599                         ;
1600         }
1601
1602         return(s - src - 1);    /* count does not include NUL */
1603 }
1604
1605 #endif  // #ifndef HAVE_STRLCPY