common.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // common.c -- misc functions used in client and server
  21
  22 #include <stdlib.h>
  23 #include <fcntl.h>
  24 #ifndef WIN32
  25 #include <unistd.h>
  26 #endif
  27
  28 #include "quakedef.h"
  29
  30 cvar_t registered = {0, "registered","0", "indicates if this is running registered quake (whether gfx/pop.lmp was found)"};
  31 cvar_t cmdline = {0, "cmdline","0", "contains commandline the engine was launched with"};
  32
  33 char com_token[MAX_INPUTLINE];
  34 int com_argc;
  35 const char **com_argv;
  36
  37 gamemode_t gamemode;
  38 const char *gamename;
  39 const char *gamedirname1;
  40 const char *gamedirname2;
  41 const char *gamescreenshotname;
  42 const char *gameuserdirname;
  43 char com_modname[MAX_OSPATH] = "";
  44
  45
  46 /*
  47 ============================================================================
  48
  49                                         BYTE ORDER FUNCTIONS
  50
  51 ============================================================================
  52 */
  53
  54 short   ShortSwap (short l)
  55 {
  56         unsigned char    b1,b2;
  57
  58         b1 = l&255;
  59         b2 = (l>>8)&255;
  60
  61         return (b1<<8) + b2;
  62 }
  63
  64 int    LongSwap (int l)
  65 {
  66         unsigned char    b1,b2,b3,b4;
  67
  68         b1 = l&255;
  69         b2 = (l>>8)&255;
  70         b3 = (l>>16)&255;
  71         b4 = (l>>24)&255;
  72
  73         return ((int)b1<<24) + ((int)b2<<16) + ((int)b3<<8) + b4;
  74 }
  75
  76 float FloatSwap (float f)
  77 {
  78         union
  79         {
  80                 float   f;
  81                 unsigned char    b[4];
  82         } dat1, dat2;
  83
  84
  85         dat1.f = f;
  86         dat2.b[0] = dat1.b[3];
  87         dat2.b[1] = dat1.b[2];
  88         dat2.b[2] = dat1.b[1];
  89         dat2.b[3] = dat1.b[0];
  90         return dat2.f;
  91 }
  92
  93
  94 // Extract integers from buffers
  95
  96 unsigned int BuffBigLong (const unsigned char *buffer)
  97 {
  98         return (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
  99 }
 100
 101 unsigned short BuffBigShort (const unsigned char *buffer)
 102 {
 103         return (buffer[0] << 8) | buffer[1];
 104 }
 105
 106 unsigned int BuffLittleLong (const unsigned char *buffer)
 107 {
 108         return (buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0];
 109 }
 110
 111 unsigned short BuffLittleShort (const unsigned char *buffer)
 112 {
 113         return (buffer[1] << 8) | buffer[0];
 114 }
 115
 116
 117 /*
 118 ============================================================================
 119
 120                                         CRC FUNCTIONS
 121
 122 ============================================================================
 123 */
 124
 125 // this is a 16 bit, non-reflected CRC using the polynomial 0x1021
 126 // and the initial and final xor values shown below...  in other words, the
 127 // CCITT standard CRC used by XMODEM
 128
 129 #define CRC_INIT_VALUE  0xffff
 130 #define CRC_XOR_VALUE   0x0000
 131
 132 static unsigned short crctable[256] =
 133 {
 134         0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
 135         0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
 136         0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
 137         0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
 138         0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
 139         0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
 140         0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
 141         0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
 142         0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
 143         0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
 144         0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
 145         0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
 146         0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
 147         0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
 148         0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
 149         0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
 150         0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
 151         0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
 152         0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
 153         0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
 154         0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
 155         0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
 156         0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
 157         0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
 158         0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
 159         0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
 160         0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
 161         0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
 162         0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
 163         0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
 164         0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
 165         0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
 166 };
 167
 168 unsigned short CRC_Block(const unsigned char *data, size_t size)
 169 {
 170         unsigned short crc = CRC_INIT_VALUE;
 171         while (size--)
 172                 crc = (crc << 8) ^ crctable[(crc >> 8) ^ (*data++)];
 173         return crc ^ CRC_XOR_VALUE;
 174 }
 175
 176 // QuakeWorld
 177 static unsigned char chktbl[1024 + 4] =
 178 {
 179         0x78,0xd2,0x94,0xe3,0x41,0xec,0xd6,0xd5,0xcb,0xfc,0xdb,0x8a,0x4b,0xcc,0x85,0x01,
 180         0x23,0xd2,0xe5,0xf2,0x29,0xa7,0x45,0x94,0x4a,0x62,0xe3,0xa5,0x6f,0x3f,0xe1,0x7a,
 181         0x64,0xed,0x5c,0x99,0x29,0x87,0xa8,0x78,0x59,0x0d,0xaa,0x0f,0x25,0x0a,0x5c,0x58,
 182         0xfb,0x00,0xa7,0xa8,0x8a,0x1d,0x86,0x80,0xc5,0x1f,0xd2,0x28,0x69,0x71,0x58,0xc3,
 183         0x51,0x90,0xe1,0xf8,0x6a,0xf3,0x8f,0xb0,0x68,0xdf,0x95,0x40,0x5c,0xe4,0x24,0x6b,
 184         0x29,0x19,0x71,0x3f,0x42,0x63,0x6c,0x48,0xe7,0xad,0xa8,0x4b,0x91,0x8f,0x42,0x36,
 185         0x34,0xe7,0x32,0x55,0x59,0x2d,0x36,0x38,0x38,0x59,0x9b,0x08,0x16,0x4d,0x8d,0xf8,
 186         0x0a,0xa4,0x52,0x01,0xbb,0x52,0xa9,0xfd,0x40,0x18,0x97,0x37,0xff,0xc9,0x82,0x27,
 187         0xb2,0x64,0x60,0xce,0x00,0xd9,0x04,0xf0,0x9e,0x99,0xbd,0xce,0x8f,0x90,0x4a,0xdd,
 188         0xe1,0xec,0x19,0x14,0xb1,0xfb,0xca,0x1e,0x98,0x0f,0xd4,0xcb,0x80,0xd6,0x05,0x63,
 189         0xfd,0xa0,0x74,0xa6,0x86,0xf6,0x19,0x98,0x76,0x27,0x68,0xf7,0xe9,0x09,0x9a,0xf2,
 190         0x2e,0x42,0xe1,0xbe,0x64,0x48,0x2a,0x74,0x30,0xbb,0x07,0xcc,0x1f,0xd4,0x91,0x9d,
 191         0xac,0x55,0x53,0x25,0xb9,0x64,0xf7,0x58,0x4c,0x34,0x16,0xbc,0xf6,0x12,0x2b,0x65,
 192         0x68,0x25,0x2e,0x29,0x1f,0xbb,0xb9,0xee,0x6d,0x0c,0x8e,0xbb,0xd2,0x5f,0x1d,0x8f,
 193         0xc1,0x39,0xf9,0x8d,0xc0,0x39,0x75,0xcf,0x25,0x17,0xbe,0x96,0xaf,0x98,0x9f,0x5f,
 194         0x65,0x15,0xc4,0x62,0xf8,0x55,0xfc,0xab,0x54,0xcf,0xdc,0x14,0x06,0xc8,0xfc,0x42,
 195         0xd3,0xf0,0xad,0x10,0x08,0xcd,0xd4,0x11,0xbb,0xca,0x67,0xc6,0x48,0x5f,0x9d,0x59,
 196         0xe3,0xe8,0x53,0x67,0x27,0x2d,0x34,0x9e,0x9e,0x24,0x29,0xdb,0x69,0x99,0x86,0xf9,
 197         0x20,0xb5,0xbb,0x5b,0xb0,0xf9,0xc3,0x67,0xad,0x1c,0x9c,0xf7,0xcc,0xef,0xce,0x69,
 198         0xe0,0x26,0x8f,0x79,0xbd,0xca,0x10,0x17,0xda,0xa9,0x88,0x57,0x9b,0x15,0x24,0xba,
 199         0x84,0xd0,0xeb,0x4d,0x14,0xf5,0xfc,0xe6,0x51,0x6c,0x6f,0x64,0x6b,0x73,0xec,0x85,
 200         0xf1,0x6f,0xe1,0x67,0x25,0x10,0x77,0x32,0x9e,0x85,0x6e,0x69,0xb1,0x83,0x00,0xe4,
 201         0x13,0xa4,0x45,0x34,0x3b,0x40,0xff,0x41,0x82,0x89,0x79,0x57,0xfd,0xd2,0x8e,0xe8,
 202         0xfc,0x1d,0x19,0x21,0x12,0x00,0xd7,0x66,0xe5,0xc7,0x10,0x1d,0xcb,0x75,0xe8,0xfa,
 203         0xb6,0xee,0x7b,0x2f,0x1a,0x25,0x24,0xb9,0x9f,0x1d,0x78,0xfb,0x84,0xd0,0x17,0x05,
 204         0x71,0xb3,0xc8,0x18,0xff,0x62,0xee,0xed,0x53,0xab,0x78,0xd3,0x65,0x2d,0xbb,0xc7,
 205         0xc1,0xe7,0x70,0xa2,0x43,0x2c,0x7c,0xc7,0x16,0x04,0xd2,0x45,0xd5,0x6b,0x6c,0x7a,
 206         0x5e,0xa1,0x50,0x2e,0x31,0x5b,0xcc,0xe8,0x65,0x8b,0x16,0x85,0xbf,0x82,0x83,0xfb,
 207         0xde,0x9f,0x36,0x48,0x32,0x79,0xd6,0x9b,0xfb,0x52,0x45,0xbf,0x43,0xf7,0x0b,0x0b,
 208         0x19,0x19,0x31,0xc3,0x85,0xec,0x1d,0x8c,0x20,0xf0,0x3a,0xfa,0x80,0x4d,0x2c,0x7d,
 209         0xac,0x60,0x09,0xc0,0x40,0xee,0xb9,0xeb,0x13,0x5b,0xe8,0x2b,0xb1,0x20,0xf0,0xce,
 210         0x4c,0xbd,0xc6,0x04,0x86,0x70,0xc6,0x33,0xc3,0x15,0x0f,0x65,0x19,0xfd,0xc2,0xd3,
 211
 212         // map checksum goes here
 213         0x00,0x00,0x00,0x00
 214 };
 215
 216 // QuakeWorld
 217 unsigned char COM_BlockSequenceCRCByteQW(unsigned char *base, int length, int sequence)
 218 {
 219         unsigned char *p;
 220         unsigned char chkb[60 + 4];
 221
 222         p = chktbl + (sequence % (sizeof(chktbl) - 8));
 223
 224         if (length > 60)
 225                 length = 60;
 226         memcpy(chkb, base, length);
 227
 228         chkb[length] = (sequence & 0xff) ^ p[0];
 229         chkb[length+1] = p[1];
 230         chkb[length+2] = ((sequence>>8) & 0xff) ^ p[2];
 231         chkb[length+3] = p[3];
 232
 233         return CRC_Block(chkb, length + 4) & 0xff;
 234 }
 235
 236 /*
 237 ==============================================================================
 238
 239                         MESSAGE IO FUNCTIONS
 240
 241 Handles byte ordering and avoids alignment errors
 242 ==============================================================================
 243 */
 244
 245 //
 246 // writing functions
 247 //
 248
 249 void MSG_WriteChar (sizebuf_t *sb, int c)
 250 {
 251         unsigned char    *buf;
 252
 253         buf = SZ_GetSpace (sb, 1);
 254         buf[0] = c;
 255 }
 256
 257 void MSG_WriteByte (sizebuf_t *sb, int c)
 258 {
 259         unsigned char    *buf;
 260
 261         buf = SZ_GetSpace (sb, 1);
 262         buf[0] = c;
 263 }
 264
 265 void MSG_WriteShort (sizebuf_t *sb, int c)
 266 {
 267         unsigned char    *buf;
 268
 269         buf = SZ_GetSpace (sb, 2);
 270         buf[0] = c&0xff;
 271         buf[1] = c>>8;
 272 }
 273
 274 void MSG_WriteLong (sizebuf_t *sb, int c)
 275 {
 276         unsigned char    *buf;
 277
 278         buf = SZ_GetSpace (sb, 4);
 279         buf[0] = c&0xff;
 280         buf[1] = (c>>8)&0xff;
 281         buf[2] = (c>>16)&0xff;
 282         buf[3] = c>>24;
 283 }
 284
 285 void MSG_WriteFloat (sizebuf_t *sb, float f)
 286 {
 287         union
 288         {
 289                 float   f;
 290                 int     l;
 291         } dat;
 292
 293
 294         dat.f = f;
 295         dat.l = LittleLong (dat.l);
 296
 297         SZ_Write (sb, (unsigned char *)&dat.l, 4);
 298 }
 299
 300 void MSG_WriteString (sizebuf_t *sb, const char *s)
 301 {
 302         if (!s || !*s)
 303                 MSG_WriteChar (sb, 0);
 304         else
 305                 SZ_Write (sb, (unsigned char *)s, (int)strlen(s)+1);
 306 }
 307
 308 void MSG_WriteUnterminatedString (sizebuf_t *sb, const char *s)
 309 {
 310         if (s && *s)
 311                 SZ_Write (sb, (unsigned char *)s, (int)strlen(s));
 312 }
 313
 314 void MSG_WriteCoord13i (sizebuf_t *sb, float f)
 315 {
 316         if (f >= 0)
 317                 MSG_WriteShort (sb, (int)(f * 8.0 + 0.5));
 318         else
 319                 MSG_WriteShort (sb, (int)(f * 8.0 - 0.5));
 320 }
 321
 322 void MSG_WriteCoord16i (sizebuf_t *sb, float f)
 323 {
 324         if (f >= 0)
 325                 MSG_WriteShort (sb, (int)(f + 0.5));
 326         else
 327                 MSG_WriteShort (sb, (int)(f - 0.5));
 328 }
 329
 330 void MSG_WriteCoord32f (sizebuf_t *sb, float f)
 331 {
 332         MSG_WriteFloat (sb, f);
 333 }
 334
 335 void MSG_WriteCoord (sizebuf_t *sb, float f, protocolversion_t protocol)
 336 {
 337         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_QUAKEWORLD)
 338                 MSG_WriteCoord13i (sb, f);
 339         else if (protocol == PROTOCOL_DARKPLACES1)
 340                 MSG_WriteCoord32f (sb, f);
 341         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
 342                 MSG_WriteCoord16i (sb, f);
 343         else
 344                 MSG_WriteCoord32f (sb, f);
 345 }
 346
 347 void MSG_WriteVector (sizebuf_t *sb, float *v, protocolversion_t protocol)
 348 {
 349         MSG_WriteCoord (sb, v[0], protocol);
 350         MSG_WriteCoord (sb, v[1], protocol);
 351         MSG_WriteCoord (sb, v[2], protocol);
 352 }
 353
 354 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
 355 void MSG_WriteAngle8i (sizebuf_t *sb, float f)
 356 {
 357         if (f >= 0)
 358                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) + 0.5) & 255);
 359         else
 360                 MSG_WriteByte (sb, (int)(f*(256.0/360.0) - 0.5) & 255);
 361 }
 362
 363 void MSG_WriteAngle16i (sizebuf_t *sb, float f)
 364 {
 365         if (f >= 0)
 366                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) + 0.5) & 65535);
 367         else
 368                 MSG_WriteShort (sb, (int)(f*(65536.0/360.0) - 0.5) & 65535);
 369 }
 370
 371 void MSG_WriteAngle32f (sizebuf_t *sb, float f)
 372 {
 373         MSG_WriteFloat (sb, f);
 374 }
 375
 376 void MSG_WriteAngle (sizebuf_t *sb, float f, protocolversion_t protocol)
 377 {
 378         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4 || protocol == PROTOCOL_QUAKEWORLD)
 379                 MSG_WriteAngle8i (sb, f);
 380         else
 381                 MSG_WriteAngle16i (sb, f);
 382 }
 383
 384 //
 385 // reading functions
 386 //
 387 int msg_readcount;
 388 qboolean msg_badread;
 389
 390 void MSG_BeginReading (void)
 391 {
 392         msg_readcount = 0;
 393         msg_badread = false;
 394 }
 395
 396 int MSG_ReadLittleShort (void)
 397 {
 398         if (msg_readcount+2 > net_message.cursize)
 399         {
 400                 msg_badread = true;
 401                 return -1;
 402         }
 403         msg_readcount += 2;
 404         return (short)(net_message.data[msg_readcount-2] | (net_message.data[msg_readcount-1]<<8));
 405 }
 406
 407 int MSG_ReadBigShort (void)
 408 {
 409         if (msg_readcount+2 > net_message.cursize)
 410         {
 411                 msg_badread = true;
 412                 return -1;
 413         }
 414         msg_readcount += 2;
 415         return (short)((net_message.data[msg_readcount-2]<<8) + net_message.data[msg_readcount-1]);
 416 }
 417
 418 int MSG_ReadLittleLong (void)
 419 {
 420         if (msg_readcount+4 > net_message.cursize)
 421         {
 422                 msg_badread = true;
 423                 return -1;
 424         }
 425         msg_readcount += 4;
 426         return net_message.data[msg_readcount-4] | (net_message.data[msg_readcount-3]<<8) | (net_message.data[msg_readcount-2]<<16) | (net_message.data[msg_readcount-1]<<24);
 427 }
 428
 429 int MSG_ReadBigLong (void)
 430 {
 431         if (msg_readcount+4 > net_message.cursize)
 432         {
 433                 msg_badread = true;
 434                 return -1;
 435         }
 436         msg_readcount += 4;
 437         return (net_message.data[msg_readcount-4]<<24) + (net_message.data[msg_readcount-3]<<16) + (net_message.data[msg_readcount-2]<<8) + net_message.data[msg_readcount-1];
 438 }
 439
 440 float MSG_ReadLittleFloat (void)
 441 {
 442         union
 443         {
 444                 float f;
 445                 int l;
 446         } dat;
 447         if (msg_readcount+4 > net_message.cursize)
 448         {
 449                 msg_badread = true;
 450                 return -1;
 451         }
 452         msg_readcount += 4;
 453         dat.l = net_message.data[msg_readcount-4] | (net_message.data[msg_readcount-3]<<8) | (net_message.data[msg_readcount-2]<<16) | (net_message.data[msg_readcount-1]<<24);
 454         return dat.f;
 455 }
 456
 457 float MSG_ReadBigFloat (void)
 458 {
 459         union
 460         {
 461                 float f;
 462                 int l;
 463         } dat;
 464         if (msg_readcount+4 > net_message.cursize)
 465         {
 466                 msg_badread = true;
 467                 return -1;
 468         }
 469         msg_readcount += 4;
 470         dat.l = (net_message.data[msg_readcount-4]<<24) | (net_message.data[msg_readcount-3]<<16) | (net_message.data[msg_readcount-2]<<8) | net_message.data[msg_readcount-1];
 471         return dat.f;
 472 }
 473
 474 char *MSG_ReadString (void)
 475 {
 476         static char string[MAX_INPUTLINE];
 477         int l,c;
 478         for (l = 0;l < (int) sizeof(string) - 1 && (c = MSG_ReadByte()) != -1 && c != 0;l++)
 479                 string[l] = c;
 480         string[l] = 0;
 481         return string;
 482 }
 483
 484 int MSG_ReadBytes (int numbytes, unsigned char *out)
 485 {
 486         int l, c;
 487         for (l = 0;l < numbytes && (c = MSG_ReadByte()) != -1;l++)
 488                 out[l] = c;
 489         return l;
 490 }
 491
 492 float MSG_ReadCoord13i (void)
 493 {
 494         return MSG_ReadLittleShort() * (1.0/8.0);
 495 }
 496
 497 float MSG_ReadCoord16i (void)
 498 {
 499         return (signed short) MSG_ReadLittleShort();
 500 }
 501
 502 float MSG_ReadCoord32f (void)
 503 {
 504         return MSG_ReadLittleFloat();
 505 }
 506
 507 float MSG_ReadCoord (protocolversion_t protocol)
 508 {
 509         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_QUAKEWORLD)
 510                 return MSG_ReadCoord13i();
 511         else if (protocol == PROTOCOL_DARKPLACES1)
 512                 return MSG_ReadCoord32f();
 513         else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
 514                 return MSG_ReadCoord16i();
 515         else
 516                 return MSG_ReadCoord32f();
 517 }
 518
 519 void MSG_ReadVector (float *v, protocolversion_t protocol)
 520 {
 521         v[0] = MSG_ReadCoord(protocol);
 522         v[1] = MSG_ReadCoord(protocol);
 523         v[2] = MSG_ReadCoord(protocol);
 524 }
 525
 526 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
 527 float MSG_ReadAngle8i (void)
 528 {
 529         return (signed char) MSG_ReadByte () * (360.0/256.0);
 530 }
 531
 532 float MSG_ReadAngle16i (void)
 533 {
 534         return (signed short)MSG_ReadShort () * (360.0/65536.0);
 535 }
 536
 537 float MSG_ReadAngle32f (void)
 538 {
 539         return MSG_ReadFloat ();
 540 }
 541
 542 float MSG_ReadAngle (protocolversion_t protocol)
 543 {
 544         if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4 || protocol == PROTOCOL_QUAKEWORLD)
 545                 return MSG_ReadAngle8i ();
 546         else
 547                 return MSG_ReadAngle16i ();
 548 }
 549
 550
 551 //===========================================================================
 552
 553 void SZ_Clear (sizebuf_t *buf)
 554 {
 555         buf->cursize = 0;
 556 }
 557
 558 unsigned char *SZ_GetSpace (sizebuf_t *buf, int length)
 559 {
 560         unsigned char *data;
 561
 562         if (buf->cursize + length > buf->maxsize)
 563         {
 564                 if (!buf->allowoverflow)
 565                         Host_Error ("SZ_GetSpace: overflow without allowoverflow set");
 566
 567                 if (length > buf->maxsize)
 568                         Host_Error ("SZ_GetSpace: %i is > full buffer size", length);
 569
 570                 buf->overflowed = true;
 571                 Con_Print("SZ_GetSpace: overflow\n");
 572                 SZ_Clear (buf);
 573         }
 574
 575         data = buf->data + buf->cursize;
 576         buf->cursize += length;
 577
 578         return data;
 579 }
 580
 581 void SZ_Write (sizebuf_t *buf, const unsigned char *data, int length)
 582 {
 583         memcpy (SZ_GetSpace(buf,length),data,length);
 584 }
 585
 586 // LordHavoc: thanks to Fuh for bringing the pure evil of SZ_Print to my
 587 // attention, it has been eradicated from here, its only (former) use in
 588 // all of darkplaces.
 589
 590 static char *hexchar = "0123456789ABCDEF";
 591 void Com_HexDumpToConsole(const unsigned char *data, int size)
 592 {
 593         int i, j, n;
 594         char text[1024];
 595         char *cur, *flushpointer;
 596         const unsigned char *d;
 597         cur = text;
 598         flushpointer = text + 512;
 599         for (i = 0;i < size;)
 600         {
 601                 n = 16;
 602                 if (n > size - i)
 603                         n = size - i;
 604                 d = data + i;
 605                 // print offset
 606                 *cur++ = hexchar[(i >> 12) & 15];
 607                 *cur++ = hexchar[(i >>  8) & 15];
 608                 *cur++ = hexchar[(i >>  4) & 15];
 609                 *cur++ = hexchar[(i >>  0) & 15];
 610                 *cur++ = ':';
 611                 // print hex
 612                 for (j = 0;j < 16;j++)
 613                 {
 614                         if (j < n)
 615                         {
 616                                 *cur++ = hexchar[(d[j] >> 4) & 15];
 617                                 *cur++ = hexchar[(d[j] >> 0) & 15];
 618                         }
 619                         else
 620                         {
 621                                 *cur++ = ' ';
 622                                 *cur++ = ' ';
 623                         }
 624                         if ((j & 3) == 3)
 625                                 *cur++ = ' ';
 626                 }
 627                 // print text
 628                 for (j = 0;j < 16;j++)
 629                 {
 630                         if (j < n)
 631                         {
 632                                 // color change prefix character has to be treated specially
 633                                 if (d[j] == STRING_COLOR_TAG)
 634                                 {
 635                                         *cur++ = STRING_COLOR_TAG;
 636                                         *cur++ = STRING_COLOR_TAG;
 637                                 }
 638                                 else if (d[j] >= ' ')
 639                                         *cur++ = d[j];
 640                                 else
 641                                         *cur++ = '.';
 642                         }
 643                         else
 644                                 *cur++ = ' ';
 645                 }
 646                 *cur++ = '\n';
 647                 i += n;
 648                 if (cur >= flushpointer || i >= size)
 649                 {
 650                         *cur++ = 0;
 651                         Con_Print(text);
 652                         cur = text;
 653                 }
 654         }
 655 }
 656
 657 void SZ_HexDumpToConsole(const sizebuf_t *buf)
 658 {
 659         Com_HexDumpToConsole(buf->data, buf->cursize);
 660 }
 661
 662
 663 //============================================================================
 664
 665
 666 /*
 667 ==============
 668 COM_ParseToken
 669
 670 Parse a token out of a string
 671 ==============
 672 */
 673 int COM_ParseToken(const char **datapointer, int returnnewline)
 674 {
 675         int len;
 676         int c;
 677         const char *data = *datapointer;
 678
 679         len = 0;
 680         com_token[0] = 0;
 681
 682         if (!data)
 683         {
 684                 *datapointer = NULL;
 685                 return false;
 686         }
 687
 688 // skip whitespace
 689 skipwhite:
 690         // line endings:
 691         // UNIX: \n
 692         // Mac: \r
 693         // Windows: \r\n
 694         for (;*data <= ' ' && ((*data != '\n' && *data != '\r') || !returnnewline);data++)
 695         {
 696                 if (*data == 0)
 697                 {
 698                         // end of file
 699                         *datapointer = NULL;
 700                         return false;
 701                 }
 702         }
 703
 704         // handle Windows line ending
 705         if (data[0] == '\r' && data[1] == '\n')
 706                 data++;
 707
 708         if (data[0] == '/' && data[1] == '/')
 709         {
 710                 // comment
 711                 while (*data && *data != '\n' && *data != '\r')
 712                         data++;
 713                 goto skipwhite;
 714         }
 715         else if (data[0] == '/' && data[1] == '*')
 716         {
 717                 // comment
 718                 data++;
 719                 while (*data && (data[0] != '*' || data[1] != '/'))
 720                         data++;
 721                 data += 2;
 722                 goto skipwhite;
 723         }
 724         else if (*data == '\"')
 725         {
 726                 // quoted string
 727                 for (data++;*data != '\"';data++)
 728                 {
 729                         if (!*data || len >= (int)sizeof(com_token) - 1)
 730                         {
 731                                 com_token[0] = 0;
 732                                 *datapointer = NULL;
 733                                 return false;
 734                         }
 735                         c = *data;
 736                         if (*data == '\\')
 737                         {
 738                                 if (data[1] == '"')
 739                                 {
 740                                         data++;
 741                                         c = *data;
 742                                 }
 743                                 else if (data[1] == '\'')
 744                                 {
 745                                         data++;
 746                                         c = *data;
 747                                 }
 748                                 else if (data[1] == 'n')
 749                                 {
 750                                         data++;
 751                                         c = '\n';
 752                                 }
 753                                 else if (data[1] == '\\')
 754                                         data++;
 755                         }
 756                         com_token[len++] = c;
 757                 }
 758                 com_token[len] = 0;
 759                 *datapointer = data+1;
 760                 return true;
 761         }
 762         else if (*data == '\'')
 763         {
 764                 // quoted string
 765                 for (data++;*data != '\'';data++)
 766                 {
 767                         if (!*data || len >= (int)sizeof(com_token) - 1)
 768                         {
 769                                 com_token[0] = 0;
 770                                 *datapointer = NULL;
 771                                 return false;
 772                         }
 773                         c = *data;
 774                         if (*data == '\\')
 775                         {
 776                                 if (data[1] == '"')
 777                                 {
 778                                         data++;
 779                                         c = *data;
 780                                 }
 781                                 else if (data[1] == '\'')
 782                                 {
 783                                         data++;
 784                                         c = *data;
 785                                 }
 786                                 else if (data[1] == 'n')
 787                                 {
 788                                         data++;
 789                                         c = '\n';
 790                                 }
 791                                 else if (data[1] == '\\')
 792                                         data++;
 793                         }
 794                         com_token[len++] = c;
 795                 }
 796                 com_token[len] = 0;
 797                 *datapointer = data+1;
 798                 return true;
 799         }
 800         else if (*data == '\r')
 801         {
 802                 // translate Mac line ending to UNIX
 803                 com_token[len++] = '\n';
 804                 com_token[len] = 0;
 805                 *datapointer = data;
 806                 return true;
 807         }
 808         else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == '\'' || *data == ':' || *data == ',' || *data == ';')
 809         {
 810                 // single character
 811                 com_token[len++] = *data++;
 812                 com_token[len] = 0;
 813                 *datapointer = data;
 814                 return true;
 815         }
 816         else
 817         {
 818                 // regular word
 819                 for (;*data > ' ' && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != '\'' && *data != ':' && *data != ',' && *data != ';' && *data != '\'' && *data != '"';data++)
 820                 {
 821                         if (len >= (int)sizeof(com_token) - 1)
 822                         {
 823                                 com_token[0] = 0;
 824                                 *datapointer = NULL;
 825                                 return false;
 826                         }
 827                         c = *data;
 828                         if (*data == '\\')
 829                         {
 830                                 if (data[1] == '"')
 831                                 {
 832                                         data++;
 833                                         c = *data;
 834                                 }
 835                                 else if (data[1] == '\'')
 836                                 {
 837                                         data++;
 838                                         c = *data;
 839                                 }
 840                                 else if (data[1] == 'n')
 841                                 {
 842                                         data++;
 843                                         c = '\n';
 844                                 }
 845                                 else if (data[1] == '\\')
 846                                         data++;
 847                         }
 848                         com_token[len++] = c;
 849                 }
 850                 com_token[len] = 0;
 851                 *datapointer = data;
 852                 return true;
 853         }
 854 }
 855
 856 /*
 857 ==============
 858 COM_ParseTokenConsole
 859
 860 Parse a token out of a string, behaving like the qwcl console
 861 ==============
 862 */
 863 int COM_ParseTokenConsole(const char **datapointer)
 864 {
 865         int len;
 866         const char *data = *datapointer;
 867
 868         len = 0;
 869         com_token[0] = 0;
 870
 871         if (!data)
 872         {
 873                 *datapointer = NULL;
 874                 return false;
 875         }
 876
 877 // skip whitespace
 878 skipwhite:
 879         for (;*data <= ' ';data++)
 880         {
 881                 if (*data == 0)
 882                 {
 883                         // end of file
 884                         *datapointer = NULL;
 885                         return false;
 886                 }
 887         }
 888
 889         if (*data == '/' && data[1] == '/')
 890         {
 891                 // comment
 892                 while (*data && *data != '\n' && *data != '\r')
 893                         data++;
 894                 goto skipwhite;
 895         }
 896         else if (*data == '\"')
 897         {
 898                 // quoted string
 899                 for (data++;*data != '\"';data++)
 900                 {
 901                         if (!*data || len >= (int)sizeof(com_token) - 1)
 902                         {
 903                                 com_token[0] = 0;
 904                                 *datapointer = NULL;
 905                                 return false;
 906                         }
 907                         com_token[len++] = *data;
 908                 }
 909                 com_token[len] = 0;
 910                 *datapointer = data+1;
 911         }
 912         else if (*data == '\'')
 913         {
 914                 // quoted string
 915                 for (data++;*data != '\'';data++)
 916                 {
 917                         if (!*data || len >= (int)sizeof(com_token) - 1)
 918                         {
 919                                 com_token[0] = 0;
 920                                 *datapointer = NULL;
 921                                 return false;
 922                         }
 923                         com_token[len++] = *data;
 924                 }
 925                 com_token[len] = 0;
 926                 *datapointer = data+1;
 927         }
 928         else
 929         {
 930                 // regular word
 931                 for (;*data > ' ';data++)
 932                 {
 933                         if (len >= (int)sizeof(com_token) - 1)
 934                         {
 935                                 com_token[0] = 0;
 936                                 *datapointer = NULL;
 937                                 return false;
 938                         }
 939                         com_token[len++] = *data;
 940                 }
 941                 com_token[len] = 0;
 942                 *datapointer = data;
 943         }
 944
 945         return true;
 946 }
 947
 948
 949 /*
 950 ================
 951 COM_CheckParm
 952
 953 Returns the position (1 to argc-1) in the program's argument list
 954 where the given parameter apears, or 0 if not present
 955 ================
 956 */
 957 int COM_CheckParm (const char *parm)
 958 {
 959         int i;
 960
 961         for (i=1 ; i<com_argc ; i++)
 962         {
 963                 if (!com_argv[i])
 964                         continue;               // NEXTSTEP sometimes clears appkit vars.
 965                 if (!strcmp (parm,com_argv[i]))
 966                         return i;
 967         }
 968
 969         return 0;
 970 }
 971
 972 //===========================================================================
 973
 974 // Game mods
 975
 976 typedef struct gamemode_info_s
 977 {
 978         const char* prog_name;
 979         const char* cmdline;
 980         const char* gamename;
 981         const char* gamedirname1;
 982         const char* gamedirname2;
 983         const char* gamescreenshotname;
 984         const char* gameuserdirname;
 985 } gamemode_info_t;
 986
 987 static const gamemode_info_t gamemode_info [] =
 988 {// prog_name           cmdline                 gamename                                gamedirname     gamescreenshotname
 989
 990 // GAME_NORMAL
 991 // COMMANDLINEOPTION: Game: -quake runs the game Quake (default)
 992 { "",                           "-quake",               "DarkPlaces-Quake",             "id1",          NULL,                   "dp",                   "darkplaces" },
 993 // GAME_HIPNOTIC
 994 // COMMANDLINEOPTION: Game: -hipnotic runs Quake mission pack 1: The Scourge of Armagon
 995 { "hipnotic",           "-hipnotic",    "Darkplaces-Hipnotic",  "id1",          "hipnotic",             "dp",                   "darkplaces" },
 996 // GAME_ROGUE
 997 // COMMANDLINEOPTION: Game: -rogue runs Quake mission pack 2: The Dissolution of Eternity
 998 { "rogue",                      "-rogue",               "Darkplaces-Rogue",             "id1",          "rogue",                "dp",                   "darkplaces" },
 999 // GAME_NEHAHRA
1000 // COMMANDLINEOPTION: Game: -nehahra runs The Seal of Nehahra movie and game
1001 { "nehahra",            "-nehahra",             "DarkPlaces-Nehahra",   "id1",          "nehahra",              "dp",                   "darkplaces" },
1002 // GAME_NEXUIZ
1003 // COMMANDLINEOPTION: Game: -nexuiz runs the multiplayer game Nexuiz
1004 { "nexuiz",                     "-nexuiz",              "Nexuiz",                               "data",         NULL,                   "nexuiz",               "nexuiz" },
1005 // GAME_TRANSFUSION
1006 // COMMANDLINEOPTION: Game: -transfusion runs Transfusion (the recreation of Blood in Quake)
1007 { "transfusion",        "-transfusion", "Transfusion",                  "basetf",       NULL,                   "transfusion",  "transfusion" },
1008 // GAME_GOODVSBAD2
1009 // COMMANDLINEOPTION: Game: -goodvsbad2 runs the psychadelic RTS FPS game Good Vs Bad 2
1010 { "gvb2",                       "-goodvsbad2",  "GoodVs.Bad2",                  "rts",          NULL,                   "gvb2",                 "gvb2" },
1011 // GAME_TEU
1012 // COMMANDLINEOPTION: Game: -teu runs The Evil Unleashed (this option is obsolete as they are not using darkplaces)
1013 { "teu",                        "-teu",                 "TheEvilUnleashed",             "baseteu",      NULL,                   "teu",                  "teu" },
1014 // GAME_BATTLEMECH
1015 // COMMANDLINEOPTION: Game: -battlemech runs the multiplayer topdown deathmatch game BattleMech
1016 { "battlemech",         "-battlemech",  "Battlemech",                   "base",         NULL,                   "battlemech",   "battlemech" },
1017 // GAME_ZYMOTIC
1018 // COMMANDLINEOPTION: Game: -zymotic runs the singleplayer game Zymotic
1019 { "zymotic",            "-zymotic",             "Zymotic",                              "basezym",              NULL,                   "zymotic",              "zymotic" },
1020 // GAME_SETHERAL
1021 // COMMANDLINEOPTION: Game: -setheral runs the multiplayer game Setheral
1022 { "setheral",           "-setheral",    "Setheral",                             "data",         NULL,                   "setheral",             "setheral" },
1023 // GAME_SOM
1024 // COMMANDLINEOPTION: Game: -som runs the multiplayer game Son Of Man
1025 { "som",                        "-som",                 "Son of Man",                   "id1",          "sonofman",             "som",                  "darkplaces" },
1026 // GAME_TENEBRAE
1027 // COMMANDLINEOPTION: Game: -tenebrae runs the graphics test mod known as Tenebrae (some features not implemented)
1028 { "tenebrae",           "-tenebrae",    "DarkPlaces-Tenebrae",  "id1",          "tenebrae",             "dp",                   "darkplaces" },
1029 // GAME_NEOTERIC
1030 // COMMANDLINEOPTION: Game: -neoteric runs the game Neoteric
1031 { "neoteric",           "-neoteric",    "Neoteric",                             "id1",          "neobase",              "neo",                  "darkplaces" },
1032 // GAME_OPENQUARTZ
1033 // COMMANDLINEOPTION: Game: -openquartz runs the game OpenQuartz, a standalone GPL replacement of the quake content
1034 { "openquartz",         "-openquartz",  "OpenQuartz",                   "id1",          NULL,                   "openquartz",   "darkplaces" },
1035 // GAME_PRYDON
1036 // COMMANDLINEOPTION: Game: -prydon runs the topdown point and click action-RPG Prydon Gate
1037 { "prydon",                     "-prydon",              "PrydonGate",                   "id1",          "prydon",               "prydon",               "darkplaces" },
1038 // GAME_NETHERWORLD
1039 // COMMANDLINEOPTION: Game: -netherworld runs the game Netherworld: Dark Master
1040 { "netherworld",        "-netherworld", "Netherworld: Dark Master",     "id1",          "netherworld",  "nw",                   "darkplaces" },
1041 // GAME_THEHUNTED
1042 // COMMANDLINEOPTION: Game: -thehunted runs the game The Hunted
1043 { "thehunted",          "-thehunted",   "The Hunted",                   "thdata",       NULL,                   "th",                   "thehunted" },
1044 // GAME_DEFEATINDETAIL2
1045 // COMMANDLINEOPTION: Game: -did2 runs the game Defeat In Detail 2
1046 { "did2",                       "-did2",                "Defeat In Detail 2",   "data",         NULL,                   "did2_",                "did2" },
1047 // GAME_DARSANA
1048 // COMMANDLINEOPTION: Game: -darsana runs the game Darsana
1049 { "darsana",            "-darsana",     "Darsana",                      "ddata",        NULL,                   "darsana",                      "darsana" },
1050 // GAME_CONTAGIONTHEORY
1051 // COMMANDLINEOPTION: Game: -contagiontheory runs the game Contagion Theory
1052 { "contagiontheory",            "-contagiontheory",     "Contagion Theory",                     "ctdata",       NULL,                   "ct",                   "contagiontheory" },
1053 };
1054
1055 void COM_InitGameType (void)
1056 {
1057         char name [MAX_OSPATH];
1058         unsigned int i;
1059
1060         FS_StripExtension (com_argv[0], name, sizeof (name));
1061         COM_ToLowerString (name, name, sizeof (name));
1062
1063         // Check the binary name; default to GAME_NORMAL (0)
1064         gamemode = GAME_NORMAL;
1065         for (i = 1; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
1066                 if (strstr (name, gamemode_info[i].prog_name))
1067                 {
1068                         gamemode = (gamemode_t)i;
1069                         break;
1070                 }
1071
1072         // Look for a command-line option
1073         for (i = 0; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
1074                 if (COM_CheckParm (gamemode_info[i].cmdline))
1075                 {
1076                         gamemode = (gamemode_t)i;
1077                         break;
1078                 }
1079
1080         gamename = gamemode_info[gamemode].gamename;
1081         gamedirname1 = gamemode_info[gamemode].gamedirname1;
1082         gamedirname2 = gamemode_info[gamemode].gamedirname2;
1083         gamescreenshotname = gamemode_info[gamemode].gamescreenshotname;
1084         gameuserdirname = gamemode_info[gamemode].gameuserdirname;
1085 }
1086
1087
1088 /*
1089 ================
1090 COM_Init
1091 ================
1092 */
1093 void COM_Init_Commands (void)
1094 {
1095         int i, j, n;
1096         char com_cmdline[MAX_INPUTLINE];
1097
1098         Cvar_RegisterVariable (&registered);
1099         Cvar_RegisterVariable (&cmdline);
1100
1101         // reconstitute the command line for the cmdline externally visible cvar
1102         n = 0;
1103         for (j = 0;(j < MAX_NUM_ARGVS) && (j < com_argc);j++)
1104         {
1105                 i = 0;
1106                 if (strstr(com_argv[j], " "))
1107                 {
1108                         // arg contains whitespace, store quotes around it
1109                         com_cmdline[n++] = '\"';
1110                         while ((n < ((int)sizeof(com_cmdline) - 1)) && com_argv[j][i])
1111                                 com_cmdline[n++] = com_argv[j][i++];
1112                         com_cmdline[n++] = '\"';
1113                 }
1114                 else
1115                 {
1116                         while ((n < ((int)sizeof(com_cmdline) - 1)) && com_argv[j][i])
1117                                 com_cmdline[n++] = com_argv[j][i++];
1118                 }
1119                 if (n < ((int)sizeof(com_cmdline) - 1))
1120                         com_cmdline[n++] = ' ';
1121                 else
1122                         break;
1123         }
1124         com_cmdline[n] = 0;
1125         Cvar_Set ("cmdline", com_cmdline);
1126 }
1127
1128 /*
1129 ============
1130 va
1131
1132 does a varargs printf into a temp buffer, so I don't need to have
1133 varargs versions of all text functions.
1134 FIXME: make this buffer size safe someday
1135 ============
1136 */
1137 char *va(const char *format, ...)
1138 {
1139         va_list argptr;
1140         // LordHavoc: now cycles through 8 buffers to avoid problems in most cases
1141         static char string[8][1024], *s;
1142         static int stringindex = 0;
1143
1144         s = string[stringindex];
1145         stringindex = (stringindex + 1) & 7;
1146         va_start (argptr, format);
1147         dpvsnprintf (s, sizeof (string[0]), format,argptr);
1148         va_end (argptr);
1149
1150         return s;
1151 }
1152
1153
1154 //======================================
1155
1156 // snprintf and vsnprintf are NOT portable. Use their DP counterparts instead
1157
1158 #undef snprintf
1159 #undef vsnprintf
1160
1161 #ifdef WIN32
1162 # define snprintf _snprintf
1163 # define vsnprintf _vsnprintf
1164 #endif
1165
1166
1167 int dpsnprintf (char *buffer, size_t buffersize, const char *format, ...)
1168 {
1169         va_list args;
1170         int result;
1171
1172         va_start (args, format);
1173         result = dpvsnprintf (buffer, buffersize, format, args);
1174         va_end (args);
1175
1176         return result;
1177 }
1178
1179
1180 int dpvsnprintf (char *buffer, size_t buffersize, const char *format, va_list args)
1181 {
1182         int result;
1183
1184         result = vsnprintf (buffer, buffersize, format, args);
1185         if (result < 0 || (size_t)result >= buffersize)
1186         {
1187                 buffer[buffersize - 1] = '\0';
1188                 return -1;
1189         }
1190
1191         return result;
1192 }
1193
1194
1195 //======================================
1196
1197 void COM_ToLowerString (const char *in, char *out, size_t size_out)
1198 {
1199         if (size_out == 0)
1200                 return;
1201
1202         while (*in && size_out > 1)
1203         {
1204                 if (*in >= 'A' && *in <= 'Z')
1205                         *out++ = *in++ + 'a' - 'A';
1206                 else
1207                         *out++ = *in++;
1208                 size_out--;
1209         }
1210         *out = '\0';
1211 }
1212
1213 void COM_ToUpperString (const char *in, char *out, size_t size_out)
1214 {
1215         if (size_out == 0)
1216                 return;
1217
1218         while (*in && size_out > 1)
1219         {
1220                 if (*in >= 'a' && *in <= 'z')
1221                         *out++ = *in++ + 'A' - 'a';
1222                 else
1223                         *out++ = *in++;
1224                 size_out--;
1225         }
1226         *out = '\0';
1227 }
1228
1229 int COM_StringBeginsWith(const char *s, const char *match)
1230 {
1231         for (;*s && *match;s++, match++)
1232                 if (*s != *match)
1233                         return false;
1234         return true;
1235 }
1236
1237 int COM_ReadAndTokenizeLine(const char **text, char **argv, int maxargc, char *tokenbuf, int tokenbufsize, const char *commentprefix)
1238 {
1239         int argc, commentprefixlength;
1240         char *tokenbufend;
1241         const char *l;
1242         argc = 0;
1243         tokenbufend = tokenbuf + tokenbufsize;
1244         l = *text;
1245         commentprefixlength = 0;
1246         if (commentprefix)
1247                 commentprefixlength = (int)strlen(commentprefix);
1248         while (*l && *l != '\n' && *l != '\r')
1249         {
1250                 if (*l > ' ')
1251                 {
1252                         if (commentprefixlength && !strncmp(l, commentprefix, commentprefixlength))
1253                         {
1254                                 while (*l && *l != '\n' && *l != '\r')
1255                                         l++;
1256                                 break;
1257                         }
1258                         if (argc >= maxargc)
1259                                 return -1;
1260                         argv[argc++] = tokenbuf;
1261                         if (*l == '"')
1262                         {
1263                                 l++;
1264                                 while (*l && *l != '"')
1265                                 {
1266                                         if (tokenbuf >= tokenbufend)
1267                                                 return -1;
1268                                         *tokenbuf++ = *l++;
1269                                 }
1270                                 if (*l == '"')
1271                                         l++;
1272                         }
1273                         else
1274                         {
1275                                 while (*l > ' ')
1276                                 {
1277                                         if (tokenbuf >= tokenbufend)
1278                                                 return -1;
1279                                         *tokenbuf++ = *l++;
1280                                 }
1281                         }
1282                         if (tokenbuf >= tokenbufend)
1283                                 return -1;
1284                         *tokenbuf++ = 0;
1285                 }
1286                 else
1287                         l++;
1288         }
1289         // line endings:
1290         // UNIX: \n
1291         // Mac: \r
1292         // Windows: \r\n
1293         if (*l == '\r')
1294                 l++;
1295         if (*l == '\n')
1296                 l++;
1297         *text = l;
1298         return argc;
1299 }
1300
1301 // written by Elric, thanks Elric!
1302 char *SearchInfostring(const char *infostring, const char *key)
1303 {
1304         static char value [MAX_INPUTLINE];
1305         char crt_key [MAX_INPUTLINE];
1306         size_t value_ind, key_ind;
1307         char c;
1308
1309         if (*infostring++ != '\\')
1310                 return NULL;
1311
1312         value_ind = 0;
1313         for (;;)
1314         {
1315                 key_ind = 0;
1316
1317                 // Get the key name
1318                 for (;;)
1319                 {
1320                         c = *infostring++;
1321
1322                         if (c == '\0')
1323                                 return NULL;
1324                         if (c == '\\' || key_ind == sizeof (crt_key) - 1)
1325                         {
1326                                 crt_key[key_ind] = '\0';
1327                                 break;
1328                         }
1329
1330                         crt_key[key_ind++] = c;
1331                 }
1332
1333                 // If it's the key we are looking for, save it in "value"
1334                 if (!strcmp(crt_key, key))
1335                 {
1336                         for (;;)
1337                         {
1338                                 c = *infostring++;
1339
1340                                 if (c == '\0' || c == '\\' || value_ind == sizeof (value) - 1)
1341                                 {
1342                                         value[value_ind] = '\0';
1343                                         return value;
1344                                 }
1345
1346                                 value[value_ind++] = c;
1347                         }
1348                 }
1349
1350                 // Else, skip the value
1351                 for (;;)
1352                 {
1353                         c = *infostring++;
1354
1355                         if (c == '\0')
1356                                 return NULL;
1357                         if (c == '\\')
1358                                 break;
1359                 }
1360         }
1361 }
1362
1363 void InfoString_GetValue(const char *buffer, const char *key, char *value, size_t valuelength)
1364 {
1365         int pos = 0, j;
1366         size_t keylength;
1367         if (!key)
1368                 key = "";
1369         if (!value)
1370                 value = "";
1371         keylength = strlen(key);
1372         if (valuelength < 1 || !value)
1373         {
1374                 Con_Printf("InfoString_GetValue: no room in value\n");
1375                 return;
1376         }
1377         value[0] = 0;
1378         if (strchr(key, '\\'))
1379         {
1380                 Con_Printf("InfoString_GetValue: key name \"%s\" contains \\ which is not possible in an infostring\n", key);
1381                 return;
1382         }
1383         if (strchr(key, '\"'))
1384         {
1385                 Con_Printf("InfoString_SetValue: key name \"%s\" contains \" which is not allowed in an infostring\n", key);
1386                 return;
1387         }
1388         if (!key[0])
1389         {
1390                 Con_Printf("InfoString_GetValue: can not look up a key with no name\n");
1391                 return;
1392         }
1393         while (buffer[pos] == '\\')
1394         {
1395                 if (!memcmp(buffer + pos+1, key, keylength))
1396                 {
1397                         for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1398                         pos++;
1399                         for (j = 0;buffer[pos+j] && buffer[pos+j] != '\\' && j < (int)valuelength - 1;j++)
1400                                 value[j] = buffer[pos+j];
1401                         value[j] = 0;
1402                         return;
1403                 }
1404                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1405                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1406         }
1407         // if we reach this point the key was not found
1408 }
1409
1410 void InfoString_SetValue(char *buffer, size_t bufferlength, const char *key, const char *value)
1411 {
1412         int pos = 0, pos2;
1413         size_t keylength;
1414         if (!key)
1415                 key = "";
1416         if (!value)
1417                 value = "";
1418         keylength = strlen(key);
1419         if (strchr(key, '\\') || strchr(value, '\\'))
1420         {
1421                 Con_Printf("InfoString_SetValue: \"%s\" \"%s\" contains \\ which is not possible to store in an infostring\n", key, value);
1422                 return;
1423         }
1424         if (strchr(key, '\"') || strchr(value, '\"'))
1425         {
1426                 Con_Printf("InfoString_SetValue: \"%s\" \"%s\" contains \" which is not allowed in an infostring\n", key, value);
1427                 return;
1428         }
1429         if (!key[0])
1430         {
1431                 Con_Printf("InfoString_SetValue: can not set a key with no name\n");
1432                 return;
1433         }
1434         while (buffer[pos] == '\\')
1435         {
1436                 if (!memcmp(buffer + pos+1, key, keylength))
1437                         break;
1438                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1439                 for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
1440         }
1441         // if we found the key, find the end of it because we will be replacing it
1442         pos2 = pos;
1443         if (buffer[pos] == '\\')
1444         {
1445                 for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
1446                 for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
1447         }
1448         if (bufferlength <= pos + 1 + strlen(key) + 1 + strlen(value) + strlen(buffer + pos2))
1449         {
1450                 Con_Printf("InfoString_SetValue: no room for \"%s\" \"%s\" in infostring\n", key, value);
1451                 return;
1452         }
1453         if (value && value[0])
1454         {
1455                 // set the key/value and append the remaining text
1456                 char tempbuffer[4096];
1457                 strlcpy(tempbuffer, buffer + pos2, sizeof(tempbuffer));
1458                 sprintf(buffer + pos, "\\%s\\%s%s", key, value, tempbuffer);
1459         }
1460         else
1461         {
1462                 // just remove the key from the text
1463                 strlcpy(buffer + pos, buffer + pos2, bufferlength - pos);
1464         }
1465 }
1466
1467 void InfoString_Print(char *buffer)
1468 {
1469         int i;
1470         char key[2048];
1471         char value[2048];
1472         while (*buffer)
1473         {
1474                 if (*buffer != '\\')
1475                 {
1476                         Con_Printf("InfoString_Print: corrupt string\n");
1477                         return;
1478                 }
1479                 for (buffer++, i = 0;*buffer && *buffer != '\\';buffer++)
1480                         if (i < (int)sizeof(key)-1)
1481                                 key[i++] = *buffer;
1482                 key[i] = 0;
1483                 if (*buffer != '\\')
1484                 {
1485                         Con_Printf("InfoString_Print: corrupt string\n");
1486                         return;
1487                 }
1488                 for (buffer++, i = 0;*buffer && *buffer != '\\';buffer++)
1489                         if (i < (int)sizeof(value)-1)
1490                                 value[i++] = *buffer;
1491                 value[i] = 0;
1492                 // empty value is an error case
1493                 Con_Printf("%20s %s\n", key, value[0] ? value : "NO VALUE");
1494         }
1495 }
1496
1497 //========================================================
1498 // strlcat and strlcpy, from OpenBSD
1499
1500 /*
1501  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
1502  *
1503  * Permission to use, copy, modify, and distribute this software for any
1504  * purpose with or without fee is hereby granted, provided that the above
1505  * copyright notice and this permission notice appear in all copies.
1506  *
1507  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
1508  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1509  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
1510  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1511  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1512  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1513  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1514  */
1515
1516 /*      $OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $    */
1517 /*      $OpenBSD: strlcpy.c,v 1.8 2003/06/17 21:56:24 millert Exp $     */
1518
1519
1520 #ifndef HAVE_STRLCAT
1521 size_t
1522 strlcat(char *dst, const char *src, size_t siz)
1523 {
1524         register char *d = dst;
1525         register const char *s = src;
1526         register size_t n = siz;
1527         size_t dlen;
1528
1529         /* Find the end of dst and adjust bytes left but don't go past end */
1530         while (n-- != 0 && *d != '\0')
1531                 d++;
1532         dlen = d - dst;
1533         n = siz - dlen;
1534
1535         if (n == 0)
1536                 return(dlen + strlen(s));
1537         while (*s != '\0') {
1538                 if (n != 1) {
1539                         *d++ = *s;
1540                         n--;
1541                 }
1542                 s++;
1543         }
1544         *d = '\0';
1545
1546         return(dlen + (s - src));       /* count does not include NUL */
1547 }
1548 #endif  // #ifndef HAVE_STRLCAT
1549
1550
1551 #ifndef HAVE_STRLCPY
1552 size_t
1553 strlcpy(char *dst, const char *src, size_t siz)
1554 {
1555         register char *d = dst;
1556         register const char *s = src;
1557         register size_t n = siz;
1558
1559         /* Copy as many bytes as will fit */
1560         if (n != 0 && --n != 0) {
1561                 do {
1562                         if ((*d++ = *s++) == 0)
1563                                 break;
1564                 } while (--n != 0);
1565         }
1566
1567         /* Not enough room in dst, add NUL and traverse rest of src */
1568         if (n == 0) {
1569                 if (siz != 0)
1570                         *d = '\0';              /* NUL-terminate dst */
1571                 while (*s++)
1572                         ;
1573         }
1574
1575         return(s - src - 1);    /* count does not include NUL */
1576 }
1577
1578 #endif  // #ifndef HAVE_STRLCPY