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