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 #include "utf8lib.h"
  30
  31 cvar_t registered = {0, "registered","0", "indicates if this is running registered quake (whether gfx/pop.lmp was found)"};
  32 cvar_t cmdline = {0, "cmdline","0", "contains commandline the engine was launched with"};
  33
  34 char com_token[MAX_INPUTLINE];
  35 int com_argc;
  36 const char **com_argv;
  37 int com_selffd = -1;
  38
  39 gamemode_t gamemode;
  40 const char *gamename;
  41 const char *gamedirname1;
  42 const char *gamedirname2;
  43 const char *gamescreenshotname;
  44 const char *gameuserdirname;
  45 char com_modname[MAX_OSPATH] = "";
  46
  47
  48 /*
  49 ============================================================================
  50
  51                                         BYTE ORDER FUNCTIONS
  52
  53 ============================================================================
  54 */
  55
  56
  57 float BuffBigFloat (const unsigned char *buffer)
  58 {
  59         union
  60         {
  61                 float f;
  62                 unsigned int i;
  63         }
  64         u;
  65         u.i = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
  66         return u.f;
  67 }
  68
  69 int BuffBigLong (const unsigned char *buffer)
  70 {
  71         return (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
  72 }
  73
  74 short BuffBigShort (const unsigned char *buffer)
  75 {
  76         return (buffer[0] << 8) | buffer[1];
  77 }
  78
  79 float BuffLittleFloat (const unsigned char *buffer)
  80 {
  81         union
  82         {
  83                 float f;
  84                 unsigned int i;
  85         }
  86         u;
  87         u.i = (buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0];
  88         return u.f;
  89 }
  90
  91 int BuffLittleLong (const unsigned char *buffer)
  92 {
  93         return (buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0];
  94 }
  95
  96 short BuffLittleShort (const unsigned char *buffer)
  97 {
  98         return (buffer[1] << 8) | buffer[0];
  99 }
 100
 101 void StoreBigLong (unsigned char *buffer, unsigned int i)
 102 {
 103         buffer[0] = (i >> 24) & 0xFF;
 104         buffer[1] = (i >> 16) & 0xFF;
 105         buffer[2] = (i >>  8) & 0xFF;
 106         buffer[3] = i         & 0xFF;
 107 }
 108
 109 void StoreBigShort (unsigned char *buffer, unsigned short i)
 110 {
 111         buffer[0] = (i >>  8) & 0xFF;
 112         buffer[1] = i         & 0xFF;
 113 }
 114
 115 void StoreLittleLong (unsigned char *buffer, unsigned int i)
 116 {
 117         buffer[0] = i         & 0xFF;
 118         buffer[1] = (i >>  8) & 0xFF;
 119         buffer[2] = (i >> 16) & 0xFF;
 120         buffer[3] = (i >> 24) & 0xFF;
 121 }
 122
 123 void StoreLittleShort (unsigned char *buffer, unsigned short i)
 124 {
 125         buffer[0] = i         & 0xFF;
 126         buffer[1] = (i >>  8) & 0xFF;
 127 }
 128
 129 /*
 130 ============================================================================
 131
 132                                         CRC FUNCTIONS
 133
 134 ============================================================================
 135 */
 136
 137 // this is a 16 bit, non-reflected CRC using the polynomial 0x1021
 138 // and the initial and final xor values shown below...  in other words, the
 139 // CCITT standard CRC used by XMODEM
 140
 141 #define CRC_INIT_VALUE  0xffff
 142 #define CRC_XOR_VALUE   0x0000
 143
 144 static unsigned short crctable[256] =
 145 {
 146         0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
 147         0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
 148         0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
 149         0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
 150         0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
 151         0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
 152         0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
 153         0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
 154         0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
 155         0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
 156         0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
 157         0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
 158         0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
 159         0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
 160         0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
 161         0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
 162         0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
 163         0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
 164         0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
 165         0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
 166         0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
 167         0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
 168         0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
 169         0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
 170         0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
 171         0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
 172         0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
 173         0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
 174         0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
 175         0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
 176         0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
 177         0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
 178 };
 179
 180 unsigned short CRC_Block(const unsigned char *data, size_t size)
 181 {
 182         unsigned short crc = CRC_INIT_VALUE;
 183         while (size--)
 184                 crc = (crc << 8) ^ crctable[(crc >> 8) ^ (*data++)];
 185         return crc ^ CRC_XOR_VALUE;
 186 }
 187
 188 unsigned short CRC_Block_CaseInsensitive(const unsigned char *data, size_t size)
 189 {
 190         unsigned short crc = CRC_INIT_VALUE;
 191         while (size--)
 192                 crc = (crc << 8) ^ crctable[(crc >> 8) ^ (tolower(*data++))];
 193         return crc ^ CRC_XOR_VALUE;
 194 }
 195
 196 // QuakeWorld
 197 static unsigned char chktbl[1024 + 4] =
 198 {
 199         0x78,0xd2,0x94,0xe3,0x41,0xec,0xd6,0xd5,0xcb,0xfc,0xdb,0x8a,0x4b,0xcc,0x85,0x01,
 200         0x23,0xd2,0xe5,0xf2,0x29,0xa7,0x45,0x94,0x4a,0x62,0xe3,0xa5,0x6f,0x3f,0xe1,0x7a,
 201         0x64,0xed,0x5c,0x99,0x29,0x87,0xa8,0x78,0x59,0x0d,0xaa,0x0f,0x25,0x0a,0x5c,0x58,
 202         0xfb,0x00,0xa7,0xa8,0x8a,0x1d,0x86,0x80,0xc5,0x1f,0xd2,0x28,0x69,0x71,0x58,0xc3,
 203         0x51,0x90,0xe1,0xf8,0x6a,0xf3,0x8f,0xb0,0x68,0xdf,0x95,0x40,0x5c,0xe4,0x24,0x6b,
 204         0x29,0x19,0x71,0x3f,0x42,0x63,0x6c,0x48,0xe7,0xad,0xa8,0x4b,0x91,0x8f,0x42,0x36,
 205         0x34,0xe7,0x32,0x55,0x59,0x2d,0x36,0x38,0x38,0x59,0x9b,0x08,0x16,0x4d,0x8d,0xf8,
 206         0x0a,0xa4,0x52,0x01,0xbb,0x52,0xa9,0xfd,0x40,0x18,0x97,0x37,0xff,0xc9,0x82,0x27,
 207         0xb2,0x64,0x60,0xce,0x00,0xd9,0x04,0xf0,0x9e,0x99,0xbd,0xce,0x8f,0x90,0x4a,0xdd,
 208         0xe1,0xec,0x19,0x14,0xb1,0xfb,0xca,0x1e,0x98,0x0f,0xd4,0xcb,0x80,0xd6,0x05,0x63,
 209         0xfd,0xa0,0x74,0xa6,0x86,0xf6,0x19,0x98,0x76,0x27,0x68,0xf7,0xe9,0x09,0x9a,0xf2,
 210         0x2e,0x42,0xe1,0xbe,0x64,0x48,0x2a,0x74,0x30,0xbb,0x07,0xcc,0x1f,0xd4,0x91,0x9d,
 211         0xac,0x55,0x53,0x25,0xb9,0x64,0xf7,0x58,0x4c,0x34,0x16,0xbc,0xf6,0x12,0x2b,0x65,
 212         0x68,0x25,0x2e,0x29,0x1f,0xbb,0xb9,0xee,0x6d,0x0c,0x8e,0xbb,0xd2,0x5f,0x1d,0x8f,
 213         0xc1,0x39,0xf9,0x8d,0xc0,0x39,0x75,0xcf,0x25,0x17,0xbe,0x96,0xaf,0x98,0x9f,0x5f,
 214         0x65,0x15,0xc4,0x62,0xf8,0x55,0xfc,0xab,0x54,0xcf,0xdc,0x14,0x06,0xc8,0xfc,0x42,
 215         0xd3,0xf0,0xad,0x10,0x08,0xcd,0xd4,0x11,0xbb,0xca,0x67,0xc6,0x48,0x5f,0x9d,0x59,
 216         0xe3,0xe8,0x53,0x67,0x27,0x2d,0x34,0x9e,0x9e,0x24,0x29,0xdb,0x69,0x99,0x86,0xf9,
 217         0x20,0xb5,0xbb,0x5b,0xb0,0xf9,0xc3,0x67,0xad,0x1c,0x9c,0xf7,0xcc,0xef,0xce,0x69,
 218         0xe0,0x26,0x8f,0x79,0xbd,0xca,0x10,0x17,0xda,0xa9,0x88,0x57,0x9b,0x15,0x24,0xba,
 219         0x84,0xd0,0xeb,0x4d,0x14,0xf5,0xfc,0xe6,0x51,0x6c,0x6f,0x64,0x6b,0x73,0xec,0x85,
 220         0xf1,0x6f,0xe1,0x67,0x25,0x10,0x77,0x32,0x9e,0x85,0x6e,0x69,0xb1,0x83,0x00,0xe4,
 221         0x13,0xa4,0x45,0x34,0x3b,0x40,0xff,0x41,0x82,0x89,0x79,0x57,0xfd,0xd2,0x8e,0xe8,
 222         0xfc,0x1d,0x19,0x21,0x12,0x00,0xd7,0x66,0xe5,0xc7,0x10,0x1d,0xcb,0x75,0xe8,0xfa,
 223         0xb6,0xee,0x7b,0x2f,0x1a,0x25,0x24,0xb9,0x9f,0x1d,0x78,0xfb,0x84,0xd0,0x17,0x05,
 224         0x71,0xb3,0xc8,0x18,0xff,0x62,0xee,0xed,0x53,0xab,0x78,0xd3,0x65,0x2d,0xbb,0xc7,
 225         0xc1,0xe7,0x70,0xa2,0x43,0x2c,0x7c,0xc7,0x16,0x04,0xd2,0x45,0xd5,0x6b,0x6c,0x7a,
 226         0x5e,0xa1,0x50,0x2e,0x31,0x5b,0xcc,0xe8,0x65,0x8b,0x16,0x85,0xbf,0x82,0x83,0xfb,
 227         0xde,0x9f,0x36,0x48,0x32,0x79,0xd6,0x9b,0xfb,0x52,0x45,0xbf,0x43,0xf7,0x0b,0x0b,
 228         0x19,0x19,0x31,0xc3,0x85,0xec,0x1d,0x8c,0x20,0xf0,0x3a,0xfa,0x80,0x4d,0x2c,0x7d,
 229         0xac,0x60,0x09,0xc0,0x40,0xee,0xb9,0xeb,0x13,0x5b,0xe8,0x2b,0xb1,0x20,0xf0,0xce,
 230         0x4c,0xbd,0xc6,0x04,0x86,0x70,0xc6,0x33,0xc3,0x15,0x0f,0x65,0x19,0xfd,0xc2,0xd3,
 231
 232         // map checksum goes here
 233         0x00,0x00,0x00,0x00
 234 };
 235
 236 // QuakeWorld
 237 unsigned char COM_BlockSequenceCRCByteQW(unsigned char *base, int length, int sequence)
 238 {
 239         unsigned char *p;
 240         unsigned char chkb[60 + 4];
 241
 242         p = chktbl + (sequence % (sizeof(chktbl) - 8));
 243
 244         if (length > 60)
 245                 length = 60;
 246         memcpy(chkb, base, length);
 247
 248         chkb[length] = (sequence & 0xff) ^ p[0];
 249         chkb[length+1] = p[1];
 250         chkb[length+2] = ((sequence>>8) & 0xff) ^ p[2];
 251         chkb[length+3] = p[3];
 252
 253         return CRC_Block(chkb, length + 4) & 0xff;
 254 }
 255
 256 /*
 257 ==============================================================================
 258
 259                         MESSAGE IO FUNCTIONS
 260
 261 Handles byte ordering and avoids alignment errors
 262 ==============================================================================
 263 */
 264
 265 //
 266 // writing functions
 267 //
 268
 269 void MSG_WriteChar (sizebuf_t *sb, int c)
 270 {
 271         unsigned char    *buf;
 272
 273         buf = SZ_GetSpace (sb, 1);
 274         buf[0] = c;
 275 }
 276
 277 void MSG_WriteByte (sizebuf_t *sb, int c)
 278 {
 279         unsigned char    *buf;
 280
 281         buf = SZ_GetSpace (sb, 1);
 282         buf[0] = c;
 283 }
 284
 285 void MSG_WriteShort (sizebuf_t *sb, int c)
 286 {
 287         unsigned char    *buf;
 288
 289         buf = SZ_GetSpace (sb, 2);
 290         buf[0] = c&0xff;
 291         buf[1] = c>>8;
 292 }
 293
 294 void MSG_WriteLong (sizebuf_t *sb, int c)
 295 {
 296         unsigned char    *buf;
 297
 298         buf = SZ_GetSpace (sb, 4);
 299         buf[0] = c&0xff;
 300         buf[1] = (c>>8)&0xff;
 301         buf[2] = (c>>16)&0xff;
 302         buf[3] = c>>24;
 303 }
 304
 305 void MSG_WriteFloat (sizebuf_t *sb, float f)
 306 {
 307         union
 308         {
 309                 float   f;
 310                 int     l;
 311         } dat;
 312
 313
 314         dat.f = f;
 315         dat.l = LittleLong (dat.l);
 316
 317         SZ_Write (sb, (unsigned char *)&dat.l, 4);
 318 }
 319
 320 void MSG_WriteString (sizebuf_t *sb, const char *s)
 321 {
 322         if (!s || !*s)
 323                 MSG_WriteChar (sb, 0);
 324         else
 325                 SZ_Write (sb, (unsigned char *)s, (int)strlen(s)+1);
 326 }
 327
 328 void MSG_WriteUnterminatedString (sizebuf_t *sb, const char *s)
 329 {
 330         if (s && *s)
 331                 SZ_Write (sb, (unsigned char *)s, (int)strlen(s));
 332 }
 333
 334 void MSG_WriteCoord13i (sizebuf_t *sb, float f)
 335 {
 336         if (f >= 0)
 337                 MSG_WriteShort (sb, (int)(f * 8.0 + 0.5));
 338         else
 339                 MSG_WriteShort (sb, (int)(f * 8.0 - 0.5));
 340 }
 341
 342 void MSG_WriteCoord16i (sizebuf_t *sb, float f)
 343 {
 344         if (f >= 0)
 345                 MSG_WriteShort (sb, (int)(f + 0.5));
 346         else
 347                 MSG_WriteShort (sb, (int)(f - 0.5));
 348 }
 349
 350 void MSG_WriteCoord32f (sizebuf_t *sb, float f)
 351 {
 352         MSG_WriteFloat (sb, f);
 353 }
 354
 355 void MSG_WriteCoord (sizebuf_t *sb, float f, protocolversion_t protocol)
 356 {
 357         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_NEHAHRABJP || protocol == PROTOCOL_NEHAHRABJP2 || protocol == PROTOCOL_NEHAHRABJP3 || protocol == PROTOCOL_QUAKEWORLD)
 358                 MSG_WriteCoord13i (sb, f);
 359         else if (protocol == PROTOCOL_DARKPLACES1)
 360                 MSG_WriteCoord32f (sb, f);
 361         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
 362                 MSG_WriteCoord16i (sb, f);
 363         else
 364                 MSG_WriteCoord32f (sb, f);
 365 }
 366
 367 void MSG_WriteVector (sizebuf_t *sb, float *v, protocolversion_t protocol)
 368 {
 369         MSG_WriteCoord (sb, v[0], protocol);
 370         MSG_WriteCoord (sb, v[1], protocol);
 371         MSG_WriteCoord (sb, v[2], protocol);
 372 }
 373
 374 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
 375 void MSG_WriteAngle8i (sizebuf_t *sb, float f)
 376 {
 377         if (f >= 0)
 378                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) + 0.5) & 255);
 379         else
 380                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) - 0.5) & 255);
 381 }
 382
 383 void MSG_WriteAngle16i (sizebuf_t *sb, float f)
 384 {
 385         if (f >= 0)
 386                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) + 0.5) & 65535);
 387         else
 388                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) - 0.5) & 65535);
 389 }
 390
 391 void MSG_WriteAngle32f (sizebuf_t *sb, float f)
 392 {
 393         MSG_WriteFloat (sb, f);
 394 }
 395
 396 void MSG_WriteAngle (sizebuf_t *sb, float f, protocolversion_t protocol)
 397 {
 398         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_NEHAHRABJP || protocol == PROTOCOL_NEHAHRABJP2 || protocol == PROTOCOL_NEHAHRABJP3 || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4 || protocol == PROTOCOL_QUAKEWORLD)
 399                 MSG_WriteAngle8i (sb, f);
 400         else
 401                 MSG_WriteAngle16i (sb, f);
 402 }
 403
 404 //
 405 // reading functions
 406 //
 407 int msg_readcount;
 408 qboolean msg_badread;
 409
 410 void MSG_BeginReading (void)
 411 {
 412         msg_readcount = 0;
 413         msg_badread = false;
 414 }
 415
 416 int MSG_ReadLittleShort (void)
 417 {
 418         if (msg_readcount+2 > net_message.cursize)
 419         {
 420                 msg_badread = true;
 421                 return -1;
 422         }
 423         msg_readcount += 2;
 424         return (short)(net_message.data[msg_readcount-2] | (net_message.data[msg_readcount-1]<<8));
 425 }
 426
 427 int MSG_ReadBigShort (void)
 428 {
 429         if (msg_readcount+2 > net_message.cursize)
 430         {
 431                 msg_badread = true;
 432                 return -1;
 433         }
 434         msg_readcount += 2;
 435         return (short)((net_message.data[msg_readcount-2]<<8) + net_message.data[msg_readcount-1]);
 436 }
 437
 438 int MSG_ReadLittleLong (void)
 439 {
 440         if (msg_readcount+4 > net_message.cursize)
 441         {
 442                 msg_badread = true;
 443                 return -1;
 444         }
 445         msg_readcount += 4;
 446         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);
 447 }
 448
 449 int MSG_ReadBigLong (void)
 450 {
 451         if (msg_readcount+4 > net_message.cursize)
 452         {
 453                 msg_badread = true;
 454                 return -1;
 455         }
 456         msg_readcount += 4;
 457         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];
 458 }
 459
 460 float MSG_ReadLittleFloat (void)
 461 {
 462         union
 463         {
 464                 float f;
 465                 int l;
 466         } dat;
 467         if (msg_readcount+4 > net_message.cursize)
 468         {
 469                 msg_badread = true;
 470                 return -1;
 471         }
 472         msg_readcount += 4;
 473         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);
 474         return dat.f;
 475 }
 476
 477 float MSG_ReadBigFloat (void)
 478 {
 479         union
 480         {
 481                 float f;
 482                 int l;
 483         } dat;
 484         if (msg_readcount+4 > net_message.cursize)
 485         {
 486                 msg_badread = true;
 487                 return -1;
 488         }
 489         msg_readcount += 4;
 490         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];
 491         return dat.f;
 492 }
 493
 494 char *MSG_ReadString (void)
 495 {
 496         static char string[MAX_INPUTLINE];
 497         const int maxstring = sizeof(string);
 498         int l = 0,c;
 499         // read string into buffer, but only store as many characters as will fit
 500         while ((c = MSG_ReadByte()) > 0)
 501                 if (l < maxstring - 1)
 502                         string[l++] = c;
 503         string[l] = 0;
 504         return string;
 505 }
 506
 507 int MSG_ReadBytes (int numbytes, unsigned char *out)
 508 {
 509         int l, c;
 510         for (l = 0;l < numbytes && (c = MSG_ReadByte()) != -1;l++)
 511                 out[l] = c;
 512         return l;
 513 }
 514
 515 float MSG_ReadCoord13i (void)
 516 {
 517         return MSG_ReadLittleShort() * (1.0/8.0);
 518 }
 519
 520 float MSG_ReadCoord16i (void)
 521 {
 522         return (signed short) MSG_ReadLittleShort();
 523 }
 524
 525 float MSG_ReadCoord32f (void)
 526 {
 527         return MSG_ReadLittleFloat();
 528 }
 529
 530 float MSG_ReadCoord (protocolversion_t protocol)
 531 {
 532         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_NEHAHRABJP || protocol == PROTOCOL_NEHAHRABJP2 || protocol == PROTOCOL_NEHAHRABJP3 || protocol == PROTOCOL_QUAKEWORLD)
 533                 return MSG_ReadCoord13i();
 534         else if (protocol == PROTOCOL_DARKPLACES1)
 535                 return MSG_ReadCoord32f();
 536         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
 537                 return MSG_ReadCoord16i();
 538         else
 539                 return MSG_ReadCoord32f();
 540 }
 541
 542 void MSG_ReadVector (float *v, protocolversion_t protocol)
 543 {
 544         v[0] = MSG_ReadCoord(protocol);
 545         v[1] = MSG_ReadCoord(protocol);
 546         v[2] = MSG_ReadCoord(protocol);
 547 }
 548
 549 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
 550 float MSG_ReadAngle8i (void)
 551 {
 552         return (signed char) MSG_ReadByte () * (360.0/256.0);
 553 }
 554
 555 float MSG_ReadAngle16i (void)
 556 {
 557         return (signed short)MSG_ReadShort () * (360.0/65536.0);
 558 }
 559
 560 float MSG_ReadAngle32f (void)
 561 {
 562         return MSG_ReadFloat ();
 563 }
 564
 565 float MSG_ReadAngle (protocolversion_t protocol)
 566 {
 567         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_NEHAHRABJP || protocol == PROTOCOL_NEHAHRABJP2 || protocol == PROTOCOL_NEHAHRABJP3 || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4 || protocol == PROTOCOL_QUAKEWORLD)
 568                 return MSG_ReadAngle8i ();
 569         else
 570                 return MSG_ReadAngle16i ();
 571 }
 572
 573
 574 //===========================================================================
 575
 576 void SZ_Clear (sizebuf_t *buf)
 577 {
 578         buf->cursize = 0;
 579 }
 580
 581 unsigned char *SZ_GetSpace (sizebuf_t *buf, int length)
 582 {
 583         unsigned char *data;
 584
 585         if (buf->cursize + length > buf->maxsize)
 586         {
 587                 if (!buf->allowoverflow)
 588                         Host_Error ("SZ_GetSpace: overflow without allowoverflow set");
 589
 590                 if (length > buf->maxsize)
 591                         Host_Error ("SZ_GetSpace: %i is > full buffer size", length);
 592
 593                 buf->overflowed = true;
 594                 Con_Print("SZ_GetSpace: overflow\n");
 595                 SZ_Clear (buf);
 596         }
 597
 598         data = buf->data + buf->cursize;
 599         buf->cursize += length;
 600
 601         return data;
 602 }
 603
 604 void SZ_Write (sizebuf_t *buf, const unsigned char *data, int length)
 605 {
 606         memcpy (SZ_GetSpace(buf,length),data,length);
 607 }
 608
 609 // LordHavoc: thanks to Fuh for bringing the pure evil of SZ_Print to my
 610 // attention, it has been eradicated from here, its only (former) use in
 611 // all of darkplaces.
 612
 613 static const char *hexchar = "0123456789ABCDEF";
 614 void Com_HexDumpToConsole(const unsigned char *data, int size)
 615 {
 616         int i, j, n;
 617         char text[1024];
 618         char *cur, *flushpointer;
 619         const unsigned char *d;
 620         cur = text;
 621         flushpointer = text + 512;
 622         for (i = 0;i < size;)
 623         {
 624                 n = 16;
 625                 if (n > size - i)
 626                         n = size - i;
 627                 d = data + i;
 628                 // print offset
 629                 *cur++ = hexchar[(i >> 12) & 15];
 630                 *cur++ = hexchar[(i >>  8) & 15];
 631                 *cur++ = hexchar[(i >>  4) & 15];
 632                 *cur++ = hexchar[(i >>  0) & 15];
 633                 *cur++ = ':';
 634                 // print hex
 635                 for (j = 0;j < 16;j++)
 636                 {
 637                         if (j < n)
 638                         {
 639                                 *cur++ = hexchar[(d[j] >> 4) & 15];
 640                                 *cur++ = hexchar[(d[j] >> 0) & 15];
 641                         }
 642                         else
 643                         {
 644                                 *cur++ = ' ';
 645                                 *cur++ = ' ';
 646                         }
 647                         if ((j & 3) == 3)
 648                                 *cur++ = ' ';
 649                 }
 650                 // print text
 651                 for (j = 0;j < 16;j++)
 652                 {
 653                         if (j < n)
 654                         {
 655                                 // color change prefix character has to be treated specially
 656                                 if (d[j] == STRING_COLOR_TAG)
 657                                 {
 658                                         *cur++ = STRING_COLOR_TAG;
 659                                         *cur++ = STRING_COLOR_TAG;
 660                                 }
 661                                 else if (d[j] >= (unsigned char) ' ')
 662                                         *cur++ = d[j];
 663                                 else
 664                                         *cur++ = '.';
 665                         }
 666                         else
 667                                 *cur++ = ' ';
 668                 }
 669                 *cur++ = '\n';
 670                 i += n;
 671                 if (cur >= flushpointer || i >= size)
 672                 {
 673                         *cur++ = 0;
 674                         Con_Print(text);
 675                         cur = text;
 676                 }
 677         }
 678 }
 679
 680 void SZ_HexDumpToConsole(const sizebuf_t *buf)
 681 {
 682         Com_HexDumpToConsole(buf->data, buf->cursize);
 683 }
 684
 685
 686 //============================================================================
 687
 688 /*
 689 ==============
 690 COM_Wordwrap
 691
 692 Word wraps a string. The wordWidth function is guaranteed to be called exactly
 693 once for each word in the string, so it may be stateful, no idea what that
 694 would be good for any more. At the beginning of the string, it will be called
 695 for the char 0 to initialize a clean state, and then once with the string " "
 696 (a space) so the routine knows how long a space is.
 697
 698 In case no single character fits into the given width, the wordWidth function
 699 must return the width of exactly one character.
 700
 701 Wrapped lines get the isContinuation flag set and are continuationWidth less wide.
 702
 703 The sum of the return values of the processLine function will be returned.
 704 ==============
 705 */
 706 int COM_Wordwrap(const char *string, size_t length, float continuationWidth, float maxWidth, COM_WordWidthFunc_t wordWidth, void *passthroughCW, COM_LineProcessorFunc processLine, void *passthroughPL)
 707 {
 708         // Logic is as follows:
 709         //
 710         // For each word or whitespace:
 711         //   Newline found? Output current line, advance to next line. This is not a continuation. Continue.
 712         //   Space found? Always add it to the current line, no matter if it fits.
 713         //   Word found? Check if current line + current word fits.
 714         //     If it fits, append it. Continue.
 715         //     If it doesn't fit, output current line, advance to next line. Append the word. This is a continuation. Continue.
 716
 717         qboolean isContinuation = false;
 718         float spaceWidth;
 719         const char *startOfLine = string;
 720         const char *cursor = string;
 721         const char *end = string + length;
 722         float spaceUsedInLine = 0;
 723         float spaceUsedForWord;
 724         int result = 0;
 725         size_t wordLen;
 726         size_t dummy;
 727
 728         dummy = 0;
 729         wordWidth(passthroughCW, NULL, &dummy, -1);
 730         dummy = 1;
 731         spaceWidth = wordWidth(passthroughCW, " ", &dummy, -1);
 732
 733         for(;;)
 734         {
 735                 char ch = (cursor < end) ? *cursor : 0;
 736                 switch(ch)
 737                 {
 738                         case 0: // end of string
 739                                 result += processLine(passthroughPL, startOfLine, cursor - startOfLine, spaceUsedInLine, isContinuation);
 740                                 isContinuation = false;
 741                                 goto out;
 742                         case '\n': // end of line
 743                                 result += processLine(passthroughPL, startOfLine, cursor - startOfLine, spaceUsedInLine, isContinuation);
 744                                 isContinuation = false;
 745                                 ++cursor;
 746                                 startOfLine = cursor;
 747                                 break;
 748                         case ' ': // space
 749                                 ++cursor;
 750                                 spaceUsedInLine += spaceWidth;
 751                                 break;
 752                         default: // word
 753                                 wordLen = 1;
 754                                 while(cursor + wordLen < end)
 755                                 {
 756                                         switch(cursor[wordLen])
 757                                         {
 758                                                 case 0:
 759                                                 case '\n':
 760                                                 case ' ':
 761                                                         goto out_inner;
 762                                                 default:
 763                                                         ++wordLen;
 764                                                         break;
 765                                         }
 766                                 }
 767                                 out_inner:
 768                                 spaceUsedForWord = wordWidth(passthroughCW, cursor, &wordLen, maxWidth - continuationWidth); // this may have reduced wordLen when it won't fit - but this is GOOD. TODO fix words that do fit in a non-continuation line
 769                                 if(wordLen < 1) // cannot happen according to current spec of wordWidth
 770                                 {
 771                                         wordLen = 1;
 772                                         spaceUsedForWord = maxWidth + 1; // too high, forces it in a line of itself
 773                                 }
 774                                 if(spaceUsedInLine + spaceUsedForWord <= maxWidth || cursor == startOfLine)
 775                                 {
 776                                         // we can simply append it
 777                                         cursor += wordLen;
 778                                         spaceUsedInLine += spaceUsedForWord;
 779                                 }
 780                                 else
 781                                 {
 782                                         // output current line
 783                                         result += processLine(passthroughPL, startOfLine, cursor - startOfLine, spaceUsedInLine, isContinuation);
 784                                         isContinuation = true;
 785                                         startOfLine = cursor;
 786                                         cursor += wordLen;
 787                                         spaceUsedInLine = continuationWidth + spaceUsedForWord;
 788                                 }
 789                 }
 790         }
 791         out:
 792
 793         return result;
 794
 795 /*
 796         qboolean isContinuation = false;
 797         float currentWordSpace = 0;
 798         const char *currentWord = 0;
 799         float minReserve = 0;
 800
 801         float spaceUsedInLine = 0;
 802         const char *currentLine = 0;
 803         const char *currentLineEnd = 0;
 804         float currentLineFinalWhitespace = 0;
 805         const char *p;
 806
 807         int result = 0;
 808         minReserve = charWidth(passthroughCW, 0);
 809         minReserve += charWidth(passthroughCW, ' ');
 810
 811         if(maxWidth < continuationWidth + minReserve)
 812                 maxWidth = continuationWidth + minReserve;
 813
 814         charWidth(passthroughCW, 0);
 815
 816         for(p = string; p < string + length; ++p)
 817         {
 818                 char c = *p;
 819                 float w = charWidth(passthroughCW, c);
 820
 821                 if(!currentWord)
 822                 {
 823                         currentWord = p;
 824                         currentWordSpace = 0;
 825                 }
 826
 827                 if(!currentLine)
 828                 {
 829                         currentLine = p;
 830                         spaceUsedInLine = isContinuation ? continuationWidth : 0;
 831                         currentLineEnd = 0;
 832                 }
 833
 834                 if(c == ' ')
 835                 {
 836                         // 1. I can add the word AND a space - then just append it.
 837                         if(spaceUsedInLine + currentWordSpace + w <= maxWidth)
 838                         {
 839                                 currentLineEnd = p; // note: space not included here
 840                                 currentLineFinalWhitespace = w;
 841                                 spaceUsedInLine += currentWordSpace + w;
 842                         }
 843                         // 2. I can just add the word - then append it, output current line and go to next one.
 844                         else if(spaceUsedInLine + currentWordSpace <= maxWidth)
 845                         {
 846                                 result += processLine(passthroughPL, currentLine, p - currentLine, spaceUsedInLine + currentWordSpace, isContinuation);
 847                                 currentLine = 0;
 848                                 isContinuation = true;
 849                         }
 850                         // 3. Otherwise, output current line and go to next one, where I can add the word.
 851                         else if(continuationWidth + currentWordSpace + w <= maxWidth)
 852                         {
 853                                 if(currentLineEnd)
 854                                         result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
 855                                 currentLine = currentWord;
 856                                 spaceUsedInLine = continuationWidth + currentWordSpace + w;
 857                                 currentLineEnd = p;
 858                                 currentLineFinalWhitespace = w;
 859                                 isContinuation = true;
 860                         }
 861                         // 4. We can't even do that? Then output both current and next word as new lines.
 862                         else
 863                         {
 864                                 if(currentLineEnd)
 865                                 {
 866                                         result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
 867                                         isContinuation = true;
 868                                 }
 869                                 result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace, isContinuation);
 870                                 currentLine = 0;
 871                                 isContinuation = true;
 872                         }
 873                         currentWord = 0;
 874                 }
 875                 else if(c == '\n')
 876                 {
 877                         // 1. I can add the word - then do it.
 878                         if(spaceUsedInLine + currentWordSpace <= maxWidth)
 879                         {
 880                                 result += processLine(passthroughPL, currentLine, p - currentLine, spaceUsedInLine + currentWordSpace, isContinuation);
 881                         }
 882                         // 2. Otherwise, output current line, next one and make tabula rasa.
 883                         else
 884                         {
 885                                 if(currentLineEnd)
 886                                 {
 887                                         processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
 888                                         isContinuation = true;
 889                                 }
 890                                 result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace, isContinuation);
 891                         }
 892                         currentWord = 0;
 893                         currentLine = 0;
 894                         isContinuation = false;
 895                 }
 896                 else
 897                 {
 898                         currentWordSpace += w;
 899                         if(
 900                                 spaceUsedInLine + currentWordSpace > maxWidth // can't join this line...
 901                                 &&
 902                                 continuationWidth + currentWordSpace > maxWidth // can't join any other line...
 903                         )
 904                         {
 905                                 // this word cannot join ANY line...
 906                                 // so output the current line...
 907                                 if(currentLineEnd)
 908                                 {
 909                                         result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
 910                                         isContinuation = true;
 911                                 }
 912
 913                                 // then this word's beginning...
 914                                 if(isContinuation)
 915                                 {
 916                                         // it may not fit, but we know we have to split it into maxWidth - continuationWidth pieces
 917                                         float pieceWidth = maxWidth - continuationWidth;
 918                                         const char *pos = currentWord;
 919                                         currentWordSpace = 0;
 920
 921                                         // reset the char width function to a state where no kerning occurs (start of word)
 922                                         charWidth(passthroughCW, ' ');
 923                                         while(pos <= p)
 924                                         {
 925                                                 float w = charWidth(passthroughCW, *pos);
 926                                                 if(currentWordSpace + w > pieceWidth) // this piece won't fit any more
 927                                                 {
 928                                                         // print everything until it
 929                                                         result += processLine(passthroughPL, currentWord, pos - currentWord, currentWordSpace, true);
 930                                                         // go to here
 931                                                         currentWord = pos;
 932                                                         currentWordSpace = 0;
 933                                                 }
 934                                                 currentWordSpace += w;
 935                                                 ++pos;
 936                                         }
 937                                         // now we have a currentWord that fits... set up its next line
 938                                         // currentWordSpace has been set
 939                                         // currentWord has been set
 940                                         spaceUsedInLine = continuationWidth;
 941                                         currentLine = currentWord;
 942                                         currentLineEnd = 0;
 943                                         isContinuation = true;
 944                                 }
 945                                 else
 946                                 {
 947                                         // we have a guarantee that it will fix (see if clause)
 948                                         result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace - w, isContinuation);
 949
 950                                         // and use the rest of this word as new start of a line
 951                                         currentWordSpace = w;
 952                                         currentWord = p;
 953                                         spaceUsedInLine = continuationWidth;
 954                                         currentLine = p;
 955                                         currentLineEnd = 0;
 956                                         isContinuation = true;
 957                                 }
 958                         }
 959                 }
 960         }
 961
 962         if(!currentWord)
 963         {
 964                 currentWord = p;
 965                 currentWordSpace = 0;
 966         }
 967
 968         if(currentLine) // Same procedure as \n
 969         {
 970                 // Can I append the current word?
 971                 if(spaceUsedInLine + currentWordSpace <= maxWidth)
 972                         result += processLine(passthroughPL, currentLine, p - currentLine, spaceUsedInLine + currentWordSpace, isContinuation);
 973                 else
 974                 {
 975                         if(currentLineEnd)
 976                         {
 977                                 result += processLine(passthroughPL, currentLine, currentLineEnd - currentLine, spaceUsedInLine - currentLineFinalWhitespace, isContinuation);
 978                                 isContinuation = true;
 979                         }
 980                         result += processLine(passthroughPL, currentWord, p - currentWord, currentWordSpace, isContinuation);
 981                 }
 982         }
 983
 984         return result;
 985 */
 986 }
 987
 988 /*
 989 ==============
 990 COM_ParseToken_Simple
 991
 992 Parse a token out of a string
 993 ==============
 994 */
 995 int COM_ParseToken_Simple(const char **datapointer, qboolean returnnewline, qboolean parsebackslash)
 996 {
 997         int len;
 998         int c;
 999         const char *data = *datapointer;
1000
1001         len = 0;
1002         com_token[0] = 0;
1003
1004         if (!data)
1005         {
1006                 *datapointer = NULL;
1007                 return false;
1008         }
1009
1010 // skip whitespace
1011 skipwhite:
1012         // line endings:
1013         // UNIX: \n
1014         // Mac: \r
1015         // Windows: \r\n
1016         for (;ISWHITESPACE(*data) && ((*data != '\n' && *data != '\r') || !returnnewline);data++)
1017         {
1018                 if (*data == 0)
1019                 {
1020                         // end of file
1021                         *datapointer = NULL;
1022                         return false;
1023                 }
1024         }
1025
1026         // handle Windows line ending
1027         if (data[0] == '\r' && data[1] == '\n')
1028                 data++;
1029
1030         if (data[0] == '/' && data[1] == '/')
1031         {
1032                 // comment
1033                 while (*data && *data != '\n' && *data != '\r')
1034                         data++;
1035                 goto skipwhite;
1036         }
1037         else if (data[0] == '/' && data[1] == '*')
1038         {
1039                 // comment
1040                 data++;
1041                 while (*data && (data[0] != '*' || data[1] != '/'))
1042                         data++;
1043                 if (*data)
1044                         data++;
1045                 if (*data)
1046                         data++;
1047                 goto skipwhite;
1048         }
1049         else if (*data == '\"')
1050         {
1051                 // quoted string
1052                 for (data++;*data && *data != '\"';data++)
1053                 {
1054                         c = *data;
1055                         if (*data == '\\' && parsebackslash)
1056                         {
1057                                 data++;
1058                                 c = *data;
1059                                 if (c == 'n')
1060                                         c = '\n';
1061                                 else if (c == 't')
1062                                         c = '\t';
1063                         }
1064                         if (len < (int)sizeof(com_token) - 1)
1065                                 com_token[len++] = c;
1066                 }
1067                 com_token[len] = 0;
1068                 if (*data == '\"')
1069                         data++;
1070                 *datapointer = data;
1071                 return true;
1072         }
1073         else if (*data == '\r')
1074         {
1075                 // translate Mac line ending to UNIX
1076                 com_token[len++] = '\n';data++;
1077                 com_token[len] = 0;
1078                 *datapointer = data;
1079                 return true;
1080         }
1081         else if (*data == '\n')
1082         {
1083                 // single character
1084                 com_token[len++] = *data++;
1085                 com_token[len] = 0;
1086                 *datapointer = data;
1087                 return true;
1088         }
1089         else
1090         {
1091                 // regular word
1092                 for (;!ISWHITESPACE(*data);data++)
1093                         if (len < (int)sizeof(com_token) - 1)
1094                                 com_token[len++] = *data;
1095                 com_token[len] = 0;
1096                 *datapointer = data;
1097                 return true;
1098         }
1099 }
1100
1101 /*
1102 ==============
1103 COM_ParseToken_QuakeC
1104
1105 Parse a token out of a string
1106 ==============
1107 */
1108 int COM_ParseToken_QuakeC(const char **datapointer, qboolean returnnewline)
1109 {
1110         int len;
1111         int c;
1112         const char *data = *datapointer;
1113
1114         len = 0;
1115         com_token[0] = 0;
1116
1117         if (!data)
1118         {
1119                 *datapointer = NULL;
1120                 return false;
1121         }
1122
1123 // skip whitespace
1124 skipwhite:
1125         // line endings:
1126         // UNIX: \n
1127         // Mac: \r
1128         // Windows: \r\n
1129         for (;ISWHITESPACE(*data) && ((*data != '\n' && *data != '\r') || !returnnewline);data++)
1130         {
1131                 if (*data == 0)
1132                 {
1133                         // end of file
1134                         *datapointer = NULL;
1135                         return false;
1136                 }
1137         }
1138
1139         // handle Windows line ending
1140         if (data[0] == '\r' && data[1] == '\n')
1141                 data++;
1142
1143         if (data[0] == '/' && data[1] == '/')
1144         {
1145                 // comment
1146                 while (*data && *data != '\n' && *data != '\r')
1147                         data++;
1148                 goto skipwhite;
1149         }
1150         else if (data[0] == '/' && data[1] == '*')
1151         {
1152                 // comment
1153                 data++;
1154                 while (*data && (data[0] != '*' || data[1] != '/'))
1155                         data++;
1156                 if (*data)
1157                         data++;
1158                 if (*data)
1159                         data++;
1160                 goto skipwhite;
1161         }
1162         else if (*data == '\"' || *data == '\'')
1163         {
1164                 // quoted string
1165                 char quote = *data;
1166                 for (data++;*data && *data != quote;data++)
1167                 {
1168                         c = *data;
1169                         if (*data == '\\')
1170                         {
1171                                 data++;
1172                                 c = *data;
1173                                 if (c == 'n')
1174                                         c = '\n';
1175                                 else if (c == 't')
1176                                         c = '\t';
1177                         }
1178                         if (len < (int)sizeof(com_token) - 1)
1179                                 com_token[len++] = c;
1180                 }
1181                 com_token[len] = 0;
1182                 if (*data == quote)
1183                         data++;
1184                 *datapointer = data;
1185                 return true;
1186         }
1187         else if (*data == '\r')
1188         {
1189                 // translate Mac line ending to UNIX
1190                 com_token[len++] = '\n';data++;
1191                 com_token[len] = 0;
1192                 *datapointer = data;
1193                 return true;
1194         }
1195         else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == ':' || *data == ',' || *data == ';')
1196         {
1197                 // single character
1198                 com_token[len++] = *data++;
1199                 com_token[len] = 0;
1200                 *datapointer = data;
1201                 return true;
1202         }
1203         else
1204         {
1205                 // regular word
1206                 for (;!ISWHITESPACE(*data) && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != ':' && *data != ',' && *data != ';';data++)
1207                         if (len < (int)sizeof(com_token) - 1)
1208                                 com_token[len++] = *data;
1209                 com_token[len] = 0;
1210                 *datapointer = data;
1211                 return true;
1212         }
1213 }
1214
1215 /*
1216 ==============
1217 COM_ParseToken_VM_Tokenize
1218
1219 Parse a token out of a string
1220 ==============
1221 */
1222 int COM_ParseToken_VM_Tokenize(const char **datapointer, qboolean returnnewline)
1223 {
1224         int len;
1225         int c;
1226         const char *data = *datapointer;
1227
1228         len = 0;
1229         com_token[0] = 0;
1230
1231         if (!data)
1232         {
1233                 *datapointer = NULL;
1234                 return false;
1235         }
1236
1237 // skip whitespace
1238 skipwhite:
1239         // line endings:
1240         // UNIX: \n
1241         // Mac: \r
1242         // Windows: \r\n
1243         for (;ISWHITESPACE(*data) && ((*data != '\n' && *data != '\r') || !returnnewline);data++)
1244         {
1245                 if (*data == 0)
1246                 {
1247                         // end of file
1248                         *datapointer = NULL;
1249                         return false;
1250                 }
1251         }
1252
1253         // handle Windows line ending
1254         if (data[0] == '\r' && data[1] == '\n')
1255                 data++;
1256
1257         if (data[0] == '/' && data[1] == '/')
1258         {
1259                 // comment
1260                 while (*data && *data != '\n' && *data != '\r')
1261                         data++;
1262                 goto skipwhite;
1263         }
1264         else if (data[0] == '/' && data[1] == '*')
1265         {
1266                 // comment
1267                 data++;
1268                 while (*data && (data[0] != '*' || data[1] != '/'))
1269                         data++;
1270                 if (*data)
1271                         data++;
1272                 if (*data)
1273                         data++;
1274                 goto skipwhite;
1275         }
1276         else if (*data == '\"' || *data == '\'')
1277         {
1278                 char quote = *data;
1279                 // quoted string
1280                 for (data++;*data && *data != quote;data++)
1281                 {
1282                         c = *data;
1283                         if (*data == '\\')
1284                         {
1285                                 data++;
1286                                 c = *data;
1287                                 if (c == 'n')
1288                                         c = '\n';
1289                                 else if (c == 't')
1290                                         c = '\t';
1291                         }
1292                         if (len < (int)sizeof(com_token) - 1)
1293                                 com_token[len++] = c;
1294                 }
1295                 com_token[len] = 0;
1296                 if (*data == quote)
1297                         data++;
1298                 *datapointer = data;
1299                 return true;
1300         }
1301         else if (*data == '\r')
1302         {
1303                 // translate Mac line ending to UNIX
1304                 com_token[len++] = '\n';data++;
1305                 com_token[len] = 0;
1306                 *datapointer = data;
1307                 return true;
1308         }
1309         else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == ':' || *data == ',' || *data == ';')
1310         {
1311                 // single character
1312                 com_token[len++] = *data++;
1313                 com_token[len] = 0;
1314                 *datapointer = data;
1315                 return true;
1316         }
1317         else
1318         {
1319                 // regular word
1320                 for (;!ISWHITESPACE(*data) && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != ':' && *data != ',' && *data != ';';data++)
1321                         if (len < (int)sizeof(com_token) - 1)
1322                                 com_token[len++] = *data;
1323                 com_token[len] = 0;
1324                 *datapointer = data;
1325                 return true;
1326         }
1327 }
1328
1329 /*
1330 ==============
1331 COM_ParseToken_Console
1332
1333 Parse a token out of a string, behaving like the qwcl console
1334 ==============
1335 */
1336 int COM_ParseToken_Console(const char **datapointer)
1337 {
1338         int len;
1339         const char *data = *datapointer;
1340
1341         len = 0;
1342         com_token[0] = 0;
1343
1344         if (!data)
1345         {
1346                 *datapointer = NULL;
1347                 return false;
1348         }
1349
1350 // skip whitespace
1351 skipwhite:
1352         for (;ISWHITESPACE(*data);data++)
1353         {
1354                 if (*data == 0)
1355                 {
1356                         // end of file
1357                         *datapointer = NULL;
1358                         return false;
1359                 }
1360         }
1361
1362         if (*data == '/' && data[1] == '/')
1363         {
1364                 // comment
1365                 while (*data && *data != '\n' && *data != '\r')
1366                         data++;
1367                 goto skipwhite;
1368         }
1369         else if (*data == '\"')
1370         {
1371                 // quoted string
1372                 for (data++;*data && *data != '\"';data++)
1373                 {
1374                         // allow escaped " and \ case
1375                         if (*data == '\\' && (data[1] == '\"' || data[1] == '\\'))
1376                                 data++;
1377                         if (len < (int)sizeof(com_token) - 1)
1378                                 com_token[len++] = *data;
1379                 }
1380                 com_token[len] = 0;
1381                 if (*data == '\"')
1382                         data++;
1383                 *datapointer = data;
1384         }
1385         else
1386         {
1387                 // regular word
1388                 for (;!ISWHITESPACE(*data);data++)
1389                         if (len < (int)sizeof(com_token) - 1)
1390                                 com_token[len++] = *data;
1391                 com_token[len] = 0;
1392                 *datapointer = data;
1393         }
1394
1395         return true;
1396 }
1397
1398
1399 /*
1400 ================
1401 COM_CheckParm
1402
1403 Returns the position (1 to argc-1) in the program's argument list
1404 where the given parameter apears, or 0 if not present
1405 ================
1406 */
1407 int COM_CheckParm (const char *parm)
1408 {
1409         int i;
1410
1411         for (i=1 ; i<com_argc ; i++)
1412         {
1413                 if (!com_argv[i])
1414                         continue;               // NEXTSTEP sometimes clears appkit vars.
1415                 if (!strcmp (parm,com_argv[i]))
1416                         return i;
1417         }
1418
1419         return 0;
1420 }
1421
1422 //===========================================================================
1423
1424 // Game mods
1425
1426 gamemode_t com_startupgamemode;
1427 gamemode_t com_startupgamegroup;
1428
1429 typedef struct gamemode_info_s
1430 {
1431         gamemode_t mode; // this gamemode
1432         gamemode_t group; // different games with same group can switch automatically when gamedirs change
1433         const char* prog_name; // not null
1434         const char* cmdline; // not null
1435         const char* gamename; // not null
1436         const char* gamedirname1; // not null
1437         const char* gamedirname2; // null
1438         const char* gamescreenshotname; // not nul
1439         const char* gameuserdirname; // not null
1440 } gamemode_info_t;
1441
1442 static const gamemode_info_t gamemode_info [GAME_COUNT] =
1443 {// game                                basegame                                prog_name                       cmdline                         gamename                                basegame        modgame                 screenshot              userdir                            // commandline option
1444 { GAME_NORMAL,                  GAME_NORMAL,                    "",                                     "-quake",                       "DarkPlaces-Quake",             "id1",          NULL,                   "dp",                   "darkplaces"            }, // COMMANDLINEOPTION: Game: -quake runs the game Quake (default)
1445 { GAME_HIPNOTIC,                GAME_NORMAL,                    "hipnotic",                     "-hipnotic",            "Darkplaces-Hipnotic",  "id1",          "hipnotic",             "dp",                   "darkplaces"            }, // COMMANDLINEOPTION: Game: -hipnotic runs Quake mission pack 1: The Scourge of Armagon
1446 { GAME_ROGUE,                   GAME_NORMAL,                    "rogue",                        "-rogue",                       "Darkplaces-Rogue",             "id1",          "rogue",                "dp",                   "darkplaces"            }, // COMMANDLINEOPTION: Game: -rogue runs Quake mission pack 2: The Dissolution of Eternity
1447 { GAME_NEHAHRA,                 GAME_NORMAL,                    "nehahra",                      "-nehahra",                     "DarkPlaces-Nehahra",   "id1",          "nehahra",              "dp",                   "darkplaces"            }, // COMMANDLINEOPTION: Game: -nehahra runs The Seal of Nehahra movie and game
1448 { GAME_NEXUIZ,                  GAME_NEXUIZ,                    "nexuiz",                       "-nexuiz",                      "Nexuiz",                               "data",         NULL,                   "nexuiz",               "nexuiz"                        }, // COMMANDLINEOPTION: Game: -nexuiz runs the multiplayer game Nexuiz
1449 { GAME_XONOTIC,                 GAME_XONOTIC,                   "xonotic",                      "-xonotic",                     "Xonotic",                              "data",         NULL,                   "xonotic",              "xonotic"                       }, // COMMANDLINEOPTION: Game: -xonotic runs the multiplayer game Xonotic
1450 { GAME_TRANSFUSION,             GAME_TRANSFUSION,               "transfusion",          "-transfusion",         "Transfusion",                  "basetf",       NULL,                   "transfusion",  "transfusion"           }, // COMMANDLINEOPTION: Game: -transfusion runs Transfusion (the recreation of Blood in Quake)
1451 { GAME_GOODVSBAD2,              GAME_GOODVSBAD2,                "gvb2",                         "-goodvsbad2",          "GoodVs.Bad2",                  "rts",          NULL,                   "gvb2",                 "gvb2"                          }, // COMMANDLINEOPTION: Game: -goodvsbad2 runs the psychadelic RTS FPS game Good Vs Bad 2
1452 { GAME_TEU,                             GAME_TEU,                               "teu",                          "-teu",                         "TheEvilUnleashed",             "baseteu",      NULL,                   "teu",                  "teu"                           }, // COMMANDLINEOPTION: Game: -teu runs The Evil Unleashed (this option is obsolete as they are not using darkplaces)
1453 { GAME_BATTLEMECH,              GAME_BATTLEMECH,                "battlemech",           "-battlemech",          "Battlemech",                   "base",         NULL,                   "battlemech",   "battlemech"            }, // COMMANDLINEOPTION: Game: -battlemech runs the multiplayer topdown deathmatch game BattleMech
1454 { GAME_ZYMOTIC,                 GAME_ZYMOTIC,                   "zymotic",                      "-zymotic",                     "Zymotic",                              "basezym",      NULL,                   "zymotic",              "zymotic"                       }, // COMMANDLINEOPTION: Game: -zymotic runs the singleplayer game Zymotic
1455 { GAME_SETHERAL,                GAME_SETHERAL,                  "setheral",                     "-setheral",            "Setheral",                             "data",         NULL,                   "setheral",             "setheral"                      }, // COMMANDLINEOPTION: Game: -setheral runs the multiplayer game Setheral
1456 { GAME_SOM,                             GAME_NORMAL,                    "som",                          "-som",                         "Son of Man",                   "id1",          "sonofman",             "som",                  "darkplaces"            }, // COMMANDLINEOPTION: Game: -som runs the multiplayer game Son Of Man
1457 { GAME_TENEBRAE,                GAME_NORMAL,                    "tenebrae",                     "-tenebrae",            "DarkPlaces-Tenebrae",  "id1",          "tenebrae",             "dp",                   "darkplaces"            }, // COMMANDLINEOPTION: Game: -tenebrae runs the graphics test mod known as Tenebrae (some features not implemented)
1458 { GAME_NEOTERIC,                GAME_NORMAL,                    "neoteric",                     "-neoteric",            "Neoteric",                             "id1",          "neobase",              "neo",                  "darkplaces"            }, // COMMANDLINEOPTION: Game: -neoteric runs the game Neoteric
1459 { GAME_OPENQUARTZ,              GAME_NORMAL,                    "openquartz",           "-openquartz",          "OpenQuartz",                   "id1",          NULL,                   "openquartz",   "darkplaces"            }, // COMMANDLINEOPTION: Game: -openquartz runs the game OpenQuartz, a standalone GPL replacement of the quake content
1460 { GAME_PRYDON,                  GAME_NORMAL,                    "prydon",                       "-prydon",                      "PrydonGate",                   "id1",          "prydon",               "prydon",               "darkplaces"            }, // COMMANDLINEOPTION: Game: -prydon runs the topdown point and click action-RPG Prydon Gate
1461 { GAME_DELUXEQUAKE,             GAME_DELUXEQUAKE,               "dq",                           "-dq",                          "Deluxe Quake",                 "basedq",       "extradq",              "basedq",               "dq"                            }, // COMMANDLINEOPTION: Game: -dq runs the game Deluxe Quake
1462 { GAME_THEHUNTED,               GAME_THEHUNTED,                 "thehunted",            "-thehunted",           "The Hunted",                   "thdata",       NULL,                   "th",                   "thehunted"                     }, // COMMANDLINEOPTION: Game: -thehunted runs the game The Hunted
1463 { GAME_DEFEATINDETAIL2, GAME_DEFEATINDETAIL2,   "did2",                         "-did2",                        "Defeat In Detail 2",   "data",         NULL,                   "did2_",                "did2"                          }, // COMMANDLINEOPTION: Game: -did2 runs the game Defeat In Detail 2
1464 { GAME_DARSANA,                 GAME_DARSANA,                   "darsana",                      "-darsana",                     "Darsana",                              "ddata",        NULL,                   "darsana",              "darsana"                       }, // COMMANDLINEOPTION: Game: -darsana runs the game Darsana
1465 { GAME_CONTAGIONTHEORY, GAME_CONTAGIONTHEORY,   "contagiontheory",      "-contagiontheory",     "Contagion Theory",             "ctdata",       NULL,                   "ct",                   "contagiontheory"       }, // COMMANDLINEOPTION: Game: -contagiontheory runs the game Contagion Theory
1466 { GAME_EDU2P,                   GAME_EDU2P,                             "edu2p",                        "-edu2p",                       "EDU2 Prototype",               "id1",          "edu2",                 "edu2_p",               "edu2prototype"         }, // COMMANDLINEOPTION: Game: -edu2p runs the game Edu2 prototype
1467 { GAME_PROPHECY,                GAME_PROPHECY,                  "prophecy",                     "-prophecy",            "Prophecy",                             "data",         NULL,                   "prophecy",             "prophecy"                      }, // COMMANDLINEOPTION: Game: -prophecy runs the game Prophecy
1468 { GAME_BLOODOMNICIDE,   GAME_BLOODOMNICIDE,             "omnicide",                     "-omnicide",            "Blood Omnicide",               "kain",         NULL,                   "omnicide",             "omnicide"                      }, // COMMANDLINEOPTION: Game: -omnicide runs the game Blood Omnicide
1469 { GAME_STEELSTORM,              GAME_STEELSTORM,                "steelstorm",           "-steelstorm",          "Steel-Storm",                  "gamedata",     NULL,                   "ss",                   "steelstorm"            }, // COMMANDLINEOPTION: Game: -steelstorm runs the game Steel Storm
1470 { GAME_STRAPBOMB,               GAME_STRAPBOMB,                 "strapbomb",            "-strapbomb",           "Strap-on-bomb Car",    "id1",          NULL,                   "strap",                "strapbomb"                     }, // COMMANDLINEOPTION: Game: -strapbomb runs the game Strap-on-bomb Car
1471 { GAME_MOONHELM,                GAME_MOONHELM,                  "moonhelm",                     "-moonhelm",            "MoonHelm",                             "data",         NULL,                   "mh",                   "moonhelm"                      }, // COMMANDLINEOPTION: Game: -moonhelm runs the game MoonHelm
1472 };
1473
1474 static void COM_SetGameType(int index);
1475 void COM_InitGameType (void)
1476 {
1477         char name [MAX_OSPATH];
1478         int i;
1479         int index = 0;
1480
1481         FS_StripExtension (com_argv[0], name, sizeof (name));
1482         COM_ToLowerString (name, name, sizeof (name));
1483
1484         // check executable filename for keywords
1485         for (i = 1;i < (int)(sizeof (gamemode_info) / sizeof (gamemode_info[0]));i++)
1486                 if (gamemode_info[i].prog_name && gamemode_info[i].prog_name[0] && strstr (name, gamemode_info[i].prog_name))
1487                 {
1488                         index = i;
1489                         break;
1490                 }
1491
1492         // check commandline options for keywords
1493         for (i = 0;i < (int)(sizeof (gamemode_info) / sizeof (gamemode_info[0]));i++)
1494                 if (COM_CheckParm (gamemode_info[i].cmdline))
1495                 {
1496                         index = i;
1497                         break;
1498                 }
1499
1500         com_startupgamemode = gamemode_info[index].mode;
1501         com_startupgamegroup = gamemode_info[index].group;
1502         COM_SetGameType(index);
1503 }
1504
1505 void COM_ChangeGameTypeForGameDirs(void)
1506 {
1507         int i;
1508         int index = -1;
1509         // this will not not change the gamegroup
1510         // first check if a base game (single gamedir) matches
1511         for (i = 0;i < (int)(sizeof (gamemode_info) / sizeof (gamemode_info[0]));i++)
1512         {
1513                 if (gamemode_info[i].group == com_startupgamegroup && !(gamemode_info[i].gamedirname2 && gamemode_info[i].gamedirname2[0]))
1514                 {
1515                         index = i;
1516                         break;
1517                 }
1518         }
1519         // now that we have a base game, see if there is a matching derivative game (two gamedirs)
1520         if (fs_numgamedirs)
1521         {
1522                 for (i = 0;i < (int)(sizeof (gamemode_info) / sizeof (gamemode_info[0]));i++)
1523                 {
1524                         if (gamemode_info[i].group == com_startupgamegroup && (gamemode_info[i].gamedirname2 && gamemode_info[i].gamedirname2[0]) && !strcasecmp(fs_gamedirs[0], gamemode_info[i].gamedirname2))
1525                         {
1526                                 index = i;
1527                                 break;
1528                         }
1529                 }
1530         }
1531         // we now have a good guess at which game this is meant to be...
1532         if (index >= 0 && gamemode != gamemode_info[index].mode)
1533                 COM_SetGameType(index);
1534 }
1535
1536 static void COM_SetGameType(int index)
1537 {
1538         int i, t;
1539         if (index < 0 || index >= (int)(sizeof (gamemode_info) / sizeof (gamemode_info[0])))
1540                 index = 0;
1541         gamemode = gamemode_info[index].mode;
1542         gamename = gamemode_info[index].gamename;
1543         gamedirname1 = gamemode_info[index].gamedirname1;
1544         gamedirname2 = gamemode_info[index].gamedirname2;
1545         gamescreenshotname = gamemode_info[index].gamescreenshotname;
1546         gameuserdirname = gamemode_info[index].gameuserdirname;
1547
1548         if (gamemode == com_startupgamemode)
1549         {
1550                 if((t = COM_CheckParm("-customgamename")) && t + 1 < com_argc)
1551                         gamename = com_argv[t+1];
1552                 if((t = COM_CheckParm("-customgamedirname1")) && t + 1 < com_argc)
1553                         gamedirname1 = com_argv[t+1];
1554                 if((t = COM_CheckParm("-customgamedirname2")) && t + 1 < com_argc)
1555                         gamedirname2 = *com_argv[t+1] ? com_argv[t+1] : NULL;
1556                 if((t = COM_CheckParm("-customgamescreenshotname")) && t + 1 < com_argc)
1557                         gamescreenshotname = com_argv[t+1];
1558                 if((t = COM_CheckParm("-customgameuserdirname")) && t + 1 < com_argc)
1559                         gameuserdirname = com_argv[t+1];
1560         }
1561
1562         if (gamedirname2 && gamedirname2[0])
1563                 Con_Printf("Game is %s using base gamedirs %s %s", gamename, gamedirname1, gamedirname2);
1564         else
1565                 Con_Printf("Game is %s using base gamedir %s", gamename, gamedirname1);
1566         for (i = 0;i < fs_numgamedirs;i++)
1567         {
1568                 if (i == 0)
1569                         Con_Printf(", with mod gamedirs");
1570                 Con_Printf(" %s", fs_gamedirs[i]);
1571         }
1572         Con_Printf("\n");
1573 }
1574
1575
1576 /*
1577 ================
1578 COM_Init
1579 ================
1580 */
1581 void COM_Init_Commands (void)
1582 {
1583         int i, j, n;
1584         char com_cmdline[MAX_INPUTLINE];
1585
1586         Cvar_RegisterVariable (&registered);
1587         Cvar_RegisterVariable (&cmdline);
1588
1589         // reconstitute the command line for the cmdline externally visible cvar
1590         n = 0;
1591         for (j = 0;(j < MAX_NUM_ARGVS) && (j < com_argc);j++)
1592         {
1593                 i = 0;
1594                 if (strstr(com_argv[j], " "))
1595                 {
1596                         // arg contains whitespace, store quotes around it
1597                         com_cmdline[n++] = '\"';
1598                         while ((n < ((int)sizeof(com_cmdline) - 1)) && com_argv[j][i])
1599                                 com_cmdline[n++] = com_argv[j][i++];
1600                         com_cmdline[n++] = '\"';
1601                 }
1602                 else
1603                 {
1604                         while ((n < ((int)sizeof(com_cmdline) - 1)) && com_argv[j][i])
1605                                 com_cmdline[n++] = com_argv[j][i++];
1606                 }
1607                 if (n < ((int)sizeof(com_cmdline) - 1))
1608                         com_cmdline[n++] = ' ';
1609                 else
1610                         break;
1611         }
1612         com_cmdline[n] = 0;
1613         Cvar_Set ("cmdline", com_cmdline);
1614 }
1615
1616 /*
1617 ============
1618 va
1619
1620 does a varargs printf into a temp buffer, so I don't need to have
1621 varargs versions of all text functions.
1622 FIXME: make this buffer size safe someday
1623 ============
1624 */
1625 char *va(const char *format, ...)
1626 {
1627         va_list argptr;
1628         // LordHavoc: now cycles through 8 buffers to avoid problems in most cases
1629         static char string[8][1024], *s;
1630         static int stringindex = 0;
1631
1632         s = string[stringindex];
1633         stringindex = (stringindex + 1) & 7;
1634         va_start (argptr, format);
1635         dpvsnprintf (s, sizeof (string[0]), format,argptr);
1636         va_end (argptr);
1637
1638         return s;
1639 }
1640
1641
1642 //======================================
1643
1644 // snprintf and vsnprintf are NOT portable. Use their DP counterparts instead
1645
1646 #undef snprintf
1647 #undef vsnprintf
1648
1649 #ifdef WIN32
1650 # define snprintf _snprintf
1651 # define vsnprintf _vsnprintf
1652 #endif
1653
1654
1655 int dpsnprintf (char *buffer, size_t buffersize, const char *format, ...)
1656 {
1657         va_list args;
1658         int result;
1659
1660         va_start (args, format);
1661         result = dpvsnprintf (buffer, buffersize, format, args);
1662         va_end (args);
1663
1664         return result;
1665 }
1666
1667
1668 int dpvsnprintf (char *buffer, size_t buffersize, const char *format, va_list args)
1669 {
1670         int result;
1671
1672 #if _MSC_VER >= 1400
1673         result = _vsnprintf_s (buffer, buffersize, _TRUNCATE, format, args);
1674 #else
1675         result = vsnprintf (buffer, buffersize, format, args);
1676 #endif
1677         if (result < 0 || (size_t)result >= buffersize)
1678         {
1679                 buffer[buffersize - 1] = '\0';
1680                 return -1;
1681         }
1682
1683         return result;
1684 }
1685
1686
1687 //======================================
1688
1689 void COM_ToLowerString (const char *in, char *out, size_t size_out)
1690 {
1691         if (size_out == 0)
1692                 return;
1693
1694         if(utf8_enable.integer)
1695         {
1696                 *out = 0;
1697                 while(*in && size_out > 1)
1698                 {
1699                         int n;
1700                         Uchar ch = u8_getchar_utf8_enabled(in, &in);
1701                         ch = u8_tolower(ch);
1702                         n = u8_fromchar(ch, out, size_out);
1703                         if(n <= 0)
1704                                 break;
1705                         out += n;
1706                         size_out -= n;
1707                 }
1708                 return;
1709         }
1710
1711         while (*in && size_out > 1)
1712         {
1713                 if (*in >= 'A' && *in <= 'Z')
1714                         *out++ = *in++ + 'a' - 'A';
1715                 else
1716                         *out++ = *in++;
1717                 size_out--;
1718         }
1719         *out = '\0';
1720 }
1721
1722 void COM_ToUpperString (const char *in, char *out, size_t size_out)
1723 {
1724         if (size_out == 0)
1725                 return;
1726
1727         if(utf8_enable.integer)
1728         {
1729                 *out = 0;
1730                 while(*in && size_out > 1)
1731                 {
1732                         int n;
1733                         Uchar ch = u8_getchar_utf8_enabled(in, &in);
1734                         ch = u8_toupper(ch);
1735                         n = u8_fromchar(ch, out, size_out);
1736                         if(n <= 0)
1737                                 break;
1738                         out += n;
1739                         size_out -= n;
1740                 }
1741                 return;
1742         }
1743
1744         while (*in && size_out > 1)
1745         {
1746                 if (*in >= 'a' && *in <= 'z')
1747                         *out++ = *in++ + 'A' - 'a';
1748                 else
1749                         *out++ = *in++;
1750                 size_out--;
1751         }
1752         *out = '\0';
1753 }
1754
1755 int COM_StringBeginsWith(const char *s, const char *match)
1756 {
1757         for (;*s && *match;s++, match++)
1758                 if (*s != *match)
1759                         return false;
1760         return true;
1761 }
1762
1763 int COM_ReadAndTokenizeLine(const char **text, char **argv, int maxargc, char *tokenbuf, int tokenbufsize, const char *commentprefix)
1764 {
1765         int argc, commentprefixlength;
1766         char *tokenbufend;
1767         const char *l;
1768         argc = 0;
1769         tokenbufend = tokenbuf + tokenbufsize;
1770         l = *text;
1771         commentprefixlength = 0;
1772         if (commentprefix)
1773                 commentprefixlength = (int)strlen(commentprefix);
1774         while (*l && *l != '\n' && *l != '\r')
1775         {
1776                 if (!ISWHITESPACE(*l))
1777                 {
1778                         if (commentprefixlength && !strncmp(l, commentprefix, commentprefixlength))
1779                         {
1780                                 while (*l && *l != '\n' && *l != '\r')
1781                                         l++;
1782                                 break;
1783                         }
1784                         if (argc >= maxargc)
1785                                 return -1;
1786                         argv[argc++] = tokenbuf;
1787                         if (*l == '"')
1788                         {
1789                                 l++;
1790                                 while (*l && *l != '"')
1791                                 {
1792                                         if (tokenbuf >= tokenbufend)
1793                                                 return -1;
1794                                         *tokenbuf++ = *l++;
1795                                 }
1796                                 if (*l == '"')
1797                                         l++;
1798                         }
1799                         else
1800                         {
1801                                 while (!ISWHITESPACE(*l))
1802                                 {
1803                                         if (tokenbuf >= tokenbufend)
1804                                                 return -1;
1805                                         *tokenbuf++ = *l++;
1806                                 }
1807                         }
1808                         if (tokenbuf >= tokenbufend)
1809                                 return -1;
1810                         *tokenbuf++ = 0;
1811                 }
1812                 else
1813                         l++;
1814         }
1815         // line endings:
1816         // UNIX: \n
1817         // Mac: \r
1818         // Windows: \r\n
1819         if (*l == '\r')
1820                 l++;
1821         if (*l == '\n')
1822                 l++;
1823         *text = l;
1824         return argc;
1825 }
1826
1827 /*
1828 ============
1829 COM_StringLengthNoColors
1830
1831 calculates the visible width of a color coded string.
1832
1833 *valid is filled with TRUE if the string is a valid colored string (that is, if
1834 it does not end with an unfinished color code). If it gets filled with FALSE, a
1835 fix would be adding a STRING_COLOR_TAG at the end of the string.
1836
1837 valid can be set to NULL if the caller doesn't care.
1838
1839 For size_s, specify the maximum number of characters from s to use, or 0 to use
1840 all characters until the zero terminator.
1841 ============
1842 */
1843 size_t
1844 COM_StringLengthNoColors(const char *s, size_t size_s, qboolean *valid)
1845 {
1846         const char *end = size_s ? (s + size_s) : NULL;
1847         size_t len = 0;
1848         for(;;)
1849         {
1850                 switch((s == end) ? 0 : *s)
1851                 {
1852                         case 0:
1853                                 if(valid)
1854                                         *valid = TRUE;
1855                                 return len;
1856                         case STRING_COLOR_TAG:
1857                                 ++s;
1858                                 switch((s == end) ? 0 : *s)
1859                                 {
1860                                         case STRING_COLOR_RGB_TAG_CHAR:
1861                                                 if (s+1 != end && isxdigit(s[1]) &&
1862                                                         s+2 != end && isxdigit(s[2]) &&
1863                                                         s+3 != end && isxdigit(s[3]) )
1864                                                 {
1865                                                         s+=3;
1866                                                         break;
1867                                                 }
1868                                                 ++len; // STRING_COLOR_TAG
1869                                                 ++len; // STRING_COLOR_RGB_TAG_CHAR
1870                                                 break;
1871                                         case 0: // ends with unfinished color code!
1872                                                 ++len;
1873                                                 if(valid)
1874                                                         *valid = FALSE;
1875                                                 return len;
1876                                         case STRING_COLOR_TAG: // escaped ^
1877                                                 ++len;
1878                                                 break;
1879                                         case '0': case '1': case '2': case '3': case '4':
1880                                         case '5': case '6': case '7': case '8': case '9': // color code
1881                                                 break;
1882                                         default: // not a color code
1883                                                 ++len; // STRING_COLOR_TAG
1884                                                 ++len; // the character
1885                                                 break;
1886                                 }
1887                                 break;
1888                         default:
1889                                 ++len;
1890                                 break;
1891                 }
1892                 ++s;
1893         }
1894         // never get here
1895 }
1896
1897 /*
1898 ============
1899 COM_StringDecolorize
1900
1901 removes color codes from a string.
1902
1903 If escape_carets is true, the resulting string will be safe for printing. If
1904 escape_carets is false, the function will just strip color codes (for logging
1905 for example).
1906
1907 If the output buffer size did not suffice for converting, the function returns
1908 FALSE. Generally, if escape_carets is false, the output buffer needs
1909 strlen(str)+1 bytes, and if escape_carets is true, it can need strlen(str)*1.5+2
1910 bytes. In any case, the function makes sure that the resulting string is
1911 zero terminated.
1912
1913 For size_in, specify the maximum number of characters from in to use, or 0 to use
1914 all characters until the zero terminator.
1915 ============
1916 */
1917 qboolean
1918 COM_StringDecolorize(const char *in, size_t size_in, char *out, size_t size_out, qboolean escape_carets)
1919 {
1920 #define APPEND(ch) do { if(--size_out) { *out++ = (ch); } else { *out++ = 0; return FALSE; } } while(0)
1921         const char *end = size_in ? (in + size_in) : NULL;
1922         if(size_out < 1)
1923                 return FALSE;
1924         for(;;)
1925         {
1926                 switch((in == end) ? 0 : *in)
1927                 {
1928                         case 0:
1929                                 *out++ = 0;
1930                                 return TRUE;
1931                         case STRING_COLOR_TAG:
1932                                 ++in;
1933                                 switch((in == end) ? 0 : *in)
1934                                 {
1935                                         case STRING_COLOR_RGB_TAG_CHAR:
1936                                                 if (in+1 != end && isxdigit(in[1]) &&
1937                                                         in+2 != end && isxdigit(in[2]) &&
1938                                                         in+3 != end && isxdigit(in[3]) )
1939                                                 {
1940                                                         in+=3;
1941                                                         break;
1942                                                 }
1943                                                 APPEND(STRING_COLOR_TAG);
1944                                                 if(escape_carets)
1945                                                         APPEND(STRING_COLOR_TAG);
1946                                                 APPEND(STRING_COLOR_RGB_TAG_CHAR);
1947                                                 break;
1948                                         case 0: // ends with unfinished color code!
1949                                                 APPEND(STRING_COLOR_TAG);
1950                                                 // finish the code by appending another caret when escaping
1951                                                 if(escape_carets)
1952                                                         APPEND(STRING_COLOR_TAG);
1953                                                 *out++ = 0;
1954                                                 return TRUE;
1955                                         case STRING_COLOR_TAG: // escaped ^
1956                                                 APPEND(STRING_COLOR_TAG);
1957                                                 // append a ^ twice when escaping
1958                                                 if(escape_carets)
1959                                                         APPEND(STRING_COLOR_TAG);
1960                                                 break;
1961                                         case '0': case '1': case '2': case '3': case '4':
1962                                         case '5': case '6': case '7': case '8': case '9': // color code
1963                                                 break;
1964                                         default: // not a color code
1965                                                 APPEND(STRING_COLOR_TAG);
1966                                                 APPEND(*in);
1967                                                 break;
1968                                 }
1969                                 break;
1970                         default:
1971                                 APPEND(*in);
1972                                 break;
1973                 }
1974                 ++in;
1975         }
1976         // never get here
1977 #undef APPEND
1978 }
1979
1980 // written by Elric, thanks Elric!
1981 char *SearchInfostring(const char *infostring, const char *key)
1982 {
1983         static char value [MAX_INPUTLINE];
1984         char crt_key [MAX_INPUTLINE];
1985         size_t value_ind, key_ind;
1986         char c;
1987
1988         if (*infostring++ != '\\')
1989                 return NULL;
1990
1991         value_ind = 0;
1992         for (;;)
1993         {
1994                 key_ind = 0;
1995
1996                 // Get the key name
1997                 for (;;)
1998                 {
1999                         c = *infostring++;
2000
2001                         if (c == '\0')
2002                                 return NULL;
2003                         if (c == '\\' || key_ind == sizeof (crt_key) - 1)
2004                         {
2005                                 crt_key[key_ind] = '\0';
2006                                 break;
2007                         }
2008
2009                         crt_key[key_ind++] = c;
2010                 }
2011
2012                 // If it's the key we are looking for, save it in "value"
2013                 if (!strcmp(crt_key, key))
2014                 {
2015                         for (;;)
2016                         {
2017                                 c = *infostring++;
2018
2019                                 if (c == '\0' || c == '\\' || value_ind == sizeof (value) - 1)
2020                                 {
2021                                         value[value_ind] = '\0';
2022                                         return value;
2023                                 }
2024
2025                                 value[value_ind++] = c;
2026                         }
2027                 }
2028
2029                 // Else, skip the value
2030                 for (;;)
2031                 {
2032                         c = *infostring++;
2033
2034                         if (c == '\0')
2035                                 return NULL;
2036                         if (c == '\\')
2037                                 break;
2038                 }
2039         }
2040 }
2041
2042 void InfoString_GetValue(const char *buffer, const char *key, char *value, size_t valuelength)
2043 {
2044         int pos = 0, j;
2045         size_t keylength;
2046         if (!key)
2047                 key = "";
2048         keylength = strlen(key);
2049         if (valuelength < 1 || !value)
2050         {
2051                 Con_Printf("InfoString_GetValue: no room in value\n");
2052                 return;
2053         }
2054         value[0] = 0;
2055         if (strchr(key, '\\'))
2056         {
2057                 Con_Printf("InfoString_GetValue: key name \"%s\" contains \\ which is not possible in an infostring\n", key);
2058                 return;
2059         }
2060         if (strchr(key, '\"'))
2061         {
2062                 Con_Printf("InfoString_SetValue: key name \"%s\" contains \" which is not allowed in an infostring\n", key);
2063                 return;
2064         }
2065         if (!key[0])
2066         {
2067                 Con_Printf("InfoString_GetValue: can not look up a key with no name\n");
2068                 return;
2069         }
2070         while (buffer[pos] == '\\')
2071         {
2072                 if (!memcmp(buffer + pos+1, key, keylength))
2073                 {
2074                         for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2075                         pos++;
2076                         for (j = 0;buffer[pos+j] && buffer[pos+j] != '\\' && j < (int)valuelength - 1;j++)
2077                                 value[j] = buffer[pos+j];
2078                         value[j] = 0;
2079                         return;
2080                 }
2081                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2082                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2083         }
2084         // if we reach this point the key was not found
2085 }
2086
2087 void InfoString_SetValue(char *buffer, size_t bufferlength, const char *key, const char *value)
2088 {
2089         int pos = 0, pos2;
2090         size_t keylength;
2091         if (!key)
2092                 key = "";
2093         if (!value)
2094                 value = "";
2095         keylength = strlen(key);
2096         if (strchr(key, '\\') || strchr(value, '\\'))
2097         {
2098                 Con_Printf("InfoString_SetValue: \"%s\" \"%s\" contains \\ which is not possible to store in an infostring\n", key, value);
2099                 return;
2100         }
2101         if (strchr(key, '\"') || strchr(value, '\"'))
2102         {
2103                 Con_Printf("InfoString_SetValue: \"%s\" \"%s\" contains \" which is not allowed in an infostring\n", key, value);
2104                 return;
2105         }
2106         if (!key[0])
2107         {
2108                 Con_Printf("InfoString_SetValue: can not set a key with no name\n");
2109                 return;
2110         }
2111         while (buffer[pos] == '\\')
2112         {
2113                 if (!memcmp(buffer + pos+1, key, keylength))
2114                         break;
2115                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2116                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
2117         }
2118         // if we found the key, find the end of it because we will be replacing it
2119         pos2 = pos;
2120         if (buffer[pos] == '\\')
2121         {
2122                 for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
2123                 for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
2124         }
2125         if (bufferlength <= pos + 1 + strlen(key) + 1 + strlen(value) + strlen(buffer + pos2))
2126         {
2127                 Con_Printf("InfoString_SetValue: no room for \"%s\" \"%s\" in infostring\n", key, value);
2128                 return;
2129         }
2130         if (value && value[0])
2131         {
2132                 // set the key/value and append the remaining text
2133                 char tempbuffer[4096];
2134                 strlcpy(tempbuffer, buffer + pos2, sizeof(tempbuffer));
2135                 dpsnprintf(buffer + pos, bufferlength - pos, "\\%s\\%s%s", key, value, tempbuffer);
2136         }
2137         else
2138         {
2139                 // just remove the key from the text
2140                 strlcpy(buffer + pos, buffer + pos2, bufferlength - pos);
2141         }
2142 }
2143
2144 void InfoString_Print(char *buffer)
2145 {
2146         int i;
2147         char key[2048];
2148         char value[2048];
2149         while (*buffer)
2150         {
2151                 if (*buffer != '\\')
2152                 {
2153                         Con_Printf("InfoString_Print: corrupt string\n");
2154                         return;
2155                 }
2156                 for (buffer++, i = 0;*buffer && *buffer != '\\';buffer++)
2157                         if (i < (int)sizeof(key)-1)
2158                                 key[i++] = *buffer;
2159                 key[i] = 0;
2160                 if (*buffer != '\\')
2161                 {
2162                         Con_Printf("InfoString_Print: corrupt string\n");
2163                         return;
2164                 }
2165                 for (buffer++, i = 0;*buffer && *buffer != '\\';buffer++)
2166                         if (i < (int)sizeof(value)-1)
2167                                 value[i++] = *buffer;
2168                 value[i] = 0;
2169                 // empty value is an error case
2170                 Con_Printf("%20s %s\n", key, value[0] ? value : "NO VALUE");
2171         }
2172 }
2173
2174 //========================================================
2175 // strlcat and strlcpy, from OpenBSD
2176
2177 /*
2178  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
2179  *
2180  * Permission to use, copy, modify, and distribute this software for any
2181  * purpose with or without fee is hereby granted, provided that the above
2182  * copyright notice and this permission notice appear in all copies.
2183  *
2184  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
2185  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
2186  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
2187  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
2188  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
2189  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
2190  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
2191  */
2192
2193 /*      $OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $    */
2194 /*      $OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $     */
2195
2196
2197 #ifndef HAVE_STRLCAT
2198 size_t
2199 strlcat(char *dst, const char *src, size_t siz)
2200 {
2201         register char *d = dst;
2202         register const char *s = src;
2203         register size_t n = siz;
2204         size_t dlen;
2205
2206         /* Find the end of dst and adjust bytes left but don't go past end */
2207         while (n-- != 0 && *d != '\0')
2208                 d++;
2209         dlen = d - dst;
2210         n = siz - dlen;
2211
2212         if (n == 0)
2213                 return(dlen + strlen(s));
2214         while (*s != '\0') {
2215                 if (n != 1) {
2216                         *d++ = *s;
2217                         n--;
2218                 }
2219                 s++;
2220         }
2221         *d = '\0';
2222
2223         return(dlen + (s - src));       /* count does not include NUL */
2224 }
2225 #endif  // #ifndef HAVE_STRLCAT
2226
2227
2228 #ifndef HAVE_STRLCPY
2229 size_t
2230 strlcpy(char *dst, const char *src, size_t siz)
2231 {
2232         register char *d = dst;
2233         register const char *s = src;
2234         register size_t n = siz;
2235
2236         /* Copy as many bytes as will fit */
2237         if (n != 0 && --n != 0) {
2238                 do {
2239                         if ((*d++ = *s++) == 0)
2240                                 break;
2241                 } while (--n != 0);
2242         }
2243
2244         /* Not enough room in dst, add NUL and traverse rest of src */
2245         if (n == 0) {
2246                 if (siz != 0)
2247                         *d = '\0';              /* NUL-terminate dst */
2248                 while (*s++)
2249                         ;
2250         }
2251
2252         return(s - src - 1);    /* count does not include NUL */
2253 }
2254
2255 #endif  // #ifndef HAVE_STRLCPY
2256
2257 void FindFraction(double val, int *num, int *denom, int denomMax)
2258 {
2259         int i;
2260         double bestdiff;
2261         // initialize
2262         bestdiff = fabs(val);
2263         *num = 0;
2264         *denom = 1;
2265
2266         for(i = 1; i <= denomMax; ++i)
2267         {
2268                 int inum = (int) floor(0.5 + val * i);
2269                 double diff = fabs(val - inum / (double)i);
2270                 if(diff < bestdiff)
2271                 {
2272                         bestdiff = diff;
2273                         *num = inum;
2274                         *denom = i;
2275                 }
2276         }
2277 }
2278
2279 // decodes an XPM from C syntax
2280 char **XPM_DecodeString(const char *in)
2281 {
2282         static char *tokens[257];
2283         static char lines[257][512];
2284         size_t line = 0;
2285
2286         // skip until "{" token
2287         while(COM_ParseToken_QuakeC(&in, false) && strcmp(com_token, "{"));
2288
2289         // now, read in succession: string, comma-or-}
2290         while(COM_ParseToken_QuakeC(&in, false))
2291         {
2292                 tokens[line] = lines[line];
2293                 strlcpy(lines[line++], com_token, sizeof(lines[0]));
2294                 if(!COM_ParseToken_QuakeC(&in, false))
2295                         return NULL;
2296                 if(!strcmp(com_token, "}"))
2297                         break;
2298                 if(strcmp(com_token, ","))
2299                         return NULL;
2300                 if(line >= sizeof(tokens) / sizeof(tokens[0]))
2301                         return NULL;
2302         }
2303
2304         return tokens;
2305 }
2306
2307 static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
2308 static void base64_3to4(const unsigned char *in, unsigned char *out, int bytes)
2309 {
2310         unsigned char i0 = (bytes > 0) ? in[0] : 0;
2311         unsigned char i1 = (bytes > 1) ? in[1] : 0;
2312         unsigned char i2 = (bytes > 2) ? in[2] : 0;
2313         unsigned char o0 = base64[i0 >> 2];
2314         unsigned char o1 = base64[((i0 << 4) | (i1 >> 4)) & 077];
2315         unsigned char o2 = base64[((i1 << 2) | (i2 >> 6)) & 077];
2316         unsigned char o3 = base64[i2 & 077];
2317         out[0] = (bytes > 0) ? o0 : '?';
2318         out[1] = (bytes > 0) ? o1 : '?';
2319         out[2] = (bytes > 1) ? o2 : '=';
2320         out[3] = (bytes > 2) ? o3 : '=';
2321 }
2322
2323 size_t base64_encode(unsigned char *buf, size_t buflen, size_t outbuflen)
2324 {
2325         size_t blocks, i;
2326         // expand the out-buffer
2327         blocks = (buflen + 2) / 3;
2328         if(blocks*4 > outbuflen)
2329                 return 0;
2330         for(i = blocks; i > 0; )
2331         {
2332                 --i;
2333                 base64_3to4(buf + 3*i, buf + 4*i, buflen - 3*i);
2334         }
2335         return blocks * 4;
2336 }