common.c

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