common.c

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