]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - common.c
eliminated qbyte type, now uses unsigned char throughout the engine for this purpose
[xonotic/darkplaces.git] / common.c
index e167f66d1add361649079204c19c608aa4f2b223..391d840f8792f7a327bfbee5d627540cf3e2f0cd 100644 (file)
--- a/common.c
+++ b/common.c
@@ -40,10 +40,12 @@ const char **com_argv;
 #define CMDLINE_LENGTH 1024
 char com_cmdline[CMDLINE_LENGTH];
 
-int gamemode;
+gamemode_t gamemode;
 const char *gamename;
-const char *gamedirname;
+const char *gamedirname1;
+const char *gamedirname2;
 const char *gamescreenshotname;
+const char *gameuserdirname;
 char com_modname[MAX_OSPATH] = "";
 
 
@@ -57,7 +59,7 @@ char com_modname[MAX_OSPATH] = "";
 
 short   ShortSwap (short l)
 {
-       qbyte    b1,b2;
+       unsigned char    b1,b2;
 
        b1 = l&255;
        b2 = (l>>8)&255;
@@ -67,7 +69,7 @@ short   ShortSwap (short l)
 
 int    LongSwap (int l)
 {
-       qbyte    b1,b2,b3,b4;
+       unsigned char    b1,b2,b3,b4;
 
        b1 = l&255;
        b2 = (l>>8)&255;
@@ -82,7 +84,7 @@ float FloatSwap (float f)
        union
        {
                float   f;
-               qbyte    b[4];
+               unsigned char    b[4];
        } dat1, dat2;
 
 
@@ -97,27 +99,87 @@ float FloatSwap (float f)
 
 // Extract integers from buffers
 
-unsigned int BuffBigLong (const qbyte *buffer)
+unsigned int BuffBigLong (const unsigned char *buffer)
 {
        return (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
 }
 
-unsigned short BuffBigShort (const qbyte *buffer)
+unsigned short BuffBigShort (const unsigned char *buffer)
 {
        return (buffer[0] << 8) | buffer[1];
 }
 
-unsigned int BuffLittleLong (const qbyte *buffer)
+unsigned int BuffLittleLong (const unsigned char *buffer)
 {
        return (buffer[3] << 24) | (buffer[2] << 16) | (buffer[1] << 8) | buffer[0];
 }
 
-unsigned short BuffLittleShort (const qbyte *buffer)
+unsigned short BuffLittleShort (const unsigned char *buffer)
 {
        return (buffer[1] << 8) | buffer[0];
 }
 
 
+/*
+============================================================================
+
+                                       CRC FUNCTIONS
+
+============================================================================
+*/
+
+// this is a 16 bit, non-reflected CRC using the polynomial 0x1021
+// and the initial and final xor values shown below...  in other words, the
+// CCITT standard CRC used by XMODEM
+
+#define CRC_INIT_VALUE 0xffff
+#define CRC_XOR_VALUE  0x0000
+
+static unsigned short crctable[256] =
+{
+       0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
+       0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
+       0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
+       0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
+       0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
+       0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
+       0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
+       0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
+       0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
+       0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
+       0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
+       0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
+       0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
+       0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
+       0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
+       0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
+       0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
+       0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
+       0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
+       0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
+       0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
+       0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+       0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
+       0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
+       0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
+       0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
+       0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
+       0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
+       0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
+       0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
+       0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
+       0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
+};
+
+unsigned short CRC_Block(const unsigned char *data, size_t size)
+{
+       unsigned short crc = CRC_INIT_VALUE;
+       while (size--)
+               crc = (crc << 8) ^ crctable[(crc >> 8) ^ (*data++)];
+       return crc ^ CRC_XOR_VALUE;
+}
+
+
 /*
 ==============================================================================
 
@@ -133,7 +195,7 @@ Handles byte ordering and avoids alignment errors
 
 void MSG_WriteChar (sizebuf_t *sb, int c)
 {
-       qbyte    *buf;
+       unsigned char    *buf;
 
        buf = SZ_GetSpace (sb, 1);
        buf[0] = c;
@@ -141,7 +203,7 @@ void MSG_WriteChar (sizebuf_t *sb, int c)
 
 void MSG_WriteByte (sizebuf_t *sb, int c)
 {
-       qbyte    *buf;
+       unsigned char    *buf;
 
        buf = SZ_GetSpace (sb, 1);
        buf[0] = c;
@@ -149,7 +211,7 @@ void MSG_WriteByte (sizebuf_t *sb, int c)
 
 void MSG_WriteShort (sizebuf_t *sb, int c)
 {
-       qbyte    *buf;
+       unsigned char    *buf;
 
        buf = SZ_GetSpace (sb, 2);
        buf[0] = c&0xff;
@@ -158,7 +220,7 @@ void MSG_WriteShort (sizebuf_t *sb, int c)
 
 void MSG_WriteLong (sizebuf_t *sb, int c)
 {
-       qbyte    *buf;
+       unsigned char    *buf;
 
        buf = SZ_GetSpace (sb, 4);
        buf[0] = c&0xff;
@@ -179,41 +241,91 @@ void MSG_WriteFloat (sizebuf_t *sb, float f)
        dat.f = f;
        dat.l = LittleLong (dat.l);
 
-       SZ_Write (sb, &dat.l, 4);
+       SZ_Write (sb, (unsigned char *)&dat.l, 4);
 }
 
 void MSG_WriteString (sizebuf_t *sb, const char *s)
 {
        if (!s)
-               SZ_Write (sb, "", 1);
+               SZ_Write (sb, (unsigned char *)"", 1);
        else
-               SZ_Write (sb, s, strlen(s)+1);
+               SZ_Write (sb, (unsigned char *)s, (int)strlen(s)+1);
 }
 
-// used by server (always latest PROTOCOL_DARKPLACES)
-void MSG_WriteDPCoord (sizebuf_t *sb, float f)
+void MSG_WriteUnterminatedString (sizebuf_t *sb, const char *s)
+{
+       if (s)
+               SZ_Write (sb, (unsigned char *)s, (int)strlen(s));
+}
+
+void MSG_WriteCoord13i (sizebuf_t *sb, float f)
 {
        if (f >= 0)
-               MSG_WriteShort (sb, (int)(f + 0.5f));
+               MSG_WriteShort (sb, (int)(f * 8.0 + 0.5));
        else
-               MSG_WriteShort (sb, (int)(f - 0.5f));
+               MSG_WriteShort (sb, (int)(f * 8.0 - 0.5));
 }
 
-void MSG_WritePreciseAngle (sizebuf_t *sb, float f)
+void MSG_WriteCoord16i (sizebuf_t *sb, float f)
 {
        if (f >= 0)
-               MSG_WriteShort (sb, (int)(f*(65536.0f/360.0f) + 0.5f) & 65535);
+               MSG_WriteShort (sb, (int)(f + 0.5));
        else
-               MSG_WriteShort (sb, (int)(f*(65536.0f/360.0f) - 0.5f) & 65535);
+               MSG_WriteShort (sb, (int)(f - 0.5));
+}
+
+void MSG_WriteCoord32f (sizebuf_t *sb, float f)
+{
+       MSG_WriteFloat (sb, f);
+}
+
+void MSG_WriteCoord (sizebuf_t *sb, float f, protocolversion_t protocol)
+{
+       if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE)
+               MSG_WriteCoord13i (sb, f);
+       else if (protocol == PROTOCOL_DARKPLACES1)
+               MSG_WriteCoord32f (sb, f);
+       else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
+               MSG_WriteCoord16i (sb, f);
+       else
+               MSG_WriteCoord32f (sb, f);
+}
+
+void MSG_WriteVector (sizebuf_t *sb, float *v, protocolversion_t protocol)
+{
+       MSG_WriteCoord (sb, v[0], protocol);
+       MSG_WriteCoord (sb, v[1], protocol);
+       MSG_WriteCoord (sb, v[2], protocol);
 }
 
 // LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
-void MSG_WriteAngle (sizebuf_t *sb, float f)
+void MSG_WriteAngle8i (sizebuf_t *sb, float f)
+{
+       if (f >= 0)
+               MSG_WriteByte (sb, (int)(f*(256.0/360.0) + 0.5) & 255);
+       else
+               MSG_WriteByte (sb, (int)(f*(256.0/360.0) - 0.5) & 255);
+}
+
+void MSG_WriteAngle16i (sizebuf_t *sb, float f)
 {
        if (f >= 0)
-               MSG_WriteByte (sb, (int)(f*(256.0f/360.0f) + 0.5f) & 255);
+               MSG_WriteShort (sb, (int)(f*(65536.0/360.0) + 0.5) & 65535);
+       else
+               MSG_WriteShort (sb, (int)(f*(65536.0/360.0) - 0.5) & 65535);
+}
+
+void MSG_WriteAngle32f (sizebuf_t *sb, float f)
+{
+       MSG_WriteFloat (sb, f);
+}
+
+void MSG_WriteAngle (sizebuf_t *sb, float f, protocolversion_t protocol)
+{
+       if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
+               MSG_WriteAngle8i (sb, f);
        else
-               MSG_WriteByte (sb, (int)(f*(256.0f/360.0f) - 0.5f) & 255);
+               MSG_WriteAngle16i (sb, f);
 }
 
 //
@@ -324,47 +436,75 @@ int MSG_ReadBytes (int numbytes, unsigned char *out)
        return l;
 }
 
-// used by client
-float MSG_ReadCoord (void)
+float MSG_ReadCoord13i (void)
+{
+       return MSG_ReadLittleShort() * (1.0/8.0);
+}
+
+float MSG_ReadCoord16i (void)
+{
+       return (signed short) MSG_ReadLittleShort();
+}
+
+float MSG_ReadCoord32f (void)
 {
-       if (cl.protocol == PROTOCOL_DARKPLACES2 || cl.protocol == PROTOCOL_DARKPLACES3 || cl.protocol == PROTOCOL_DARKPLACES4 || cl.protocol == PROTOCOL_DARKPLACES5)
-               return (signed short) MSG_ReadLittleShort();
-       else if (cl.protocol == PROTOCOL_DARKPLACES1)
-               return MSG_ReadLittleFloat();
+       return MSG_ReadLittleFloat();
+}
+
+float MSG_ReadCoord (protocolversion_t protocol)
+{
+       if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE)
+               return MSG_ReadCoord13i();
+       else if (protocol == PROTOCOL_DARKPLACES1)
+               return MSG_ReadCoord32f();
+       else if (protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
+               return MSG_ReadCoord16i();
        else
-               return MSG_ReadLittleShort() * (1.0f/8.0f);
+               return MSG_ReadCoord32f();
 }
 
+void MSG_ReadVector (float *v, protocolversion_t protocol)
+{
+       v[0] = MSG_ReadCoord(protocol);
+       v[1] = MSG_ReadCoord(protocol);
+       v[2] = MSG_ReadCoord(protocol);
+}
 
-//===========================================================================
+// LordHavoc: round to nearest value, rather than rounding toward zero, fixes crosshair problem
+float MSG_ReadAngle8i (void)
+{
+       return (signed char) MSG_ReadByte () * (360.0/256.0);
+}
 
-void SZ_Alloc (sizebuf_t *buf, int startsize, const char *name)
+float MSG_ReadAngle16i (void)
 {
-       if (startsize < 256)
-               startsize = 256;
-       buf->mempool = Mem_AllocPool(name);
-       buf->data = Mem_Alloc(buf->mempool, startsize);
-       buf->maxsize = startsize;
-       buf->cursize = 0;
+       return (signed short)MSG_ReadShort () * (360.0/65536.0);
 }
 
+float MSG_ReadAngle32f (void)
+{
+       return MSG_ReadFloat ();
+}
 
-void SZ_Free (sizebuf_t *buf)
+float MSG_ReadAngle (protocolversion_t protocol)
 {
-       Mem_FreePool(&buf->mempool);
-       buf->data = NULL;
-       buf->maxsize = 0;
-       buf->cursize = 0;
+       if (protocol == PROTOCOL_QUAKE || protocol == PROTOCOL_QUAKEDP || protocol == PROTOCOL_NEHAHRAMOVIE || protocol == PROTOCOL_DARKPLACES1 || protocol == PROTOCOL_DARKPLACES2 || protocol == PROTOCOL_DARKPLACES3 || protocol == PROTOCOL_DARKPLACES4)
+               return MSG_ReadAngle8i ();
+       else
+               return MSG_ReadAngle16i ();
 }
 
+
+//===========================================================================
+
 void SZ_Clear (sizebuf_t *buf)
 {
        buf->cursize = 0;
 }
 
-void *SZ_GetSpace (sizebuf_t *buf, int length)
+unsigned char *SZ_GetSpace (sizebuf_t *buf, int length)
 {
-       void *data;
+       unsigned char *data;
 
        if (buf->cursize + length > buf->maxsize)
        {
@@ -385,7 +525,7 @@ void *SZ_GetSpace (sizebuf_t *buf, int length)
        return data;
 }
 
-void SZ_Write (sizebuf_t *buf, const void *data, int length)
+void SZ_Write (sizebuf_t *buf, const unsigned char *data, int length)
 {
        memcpy (SZ_GetSpace(buf,length),data,length);
 }
@@ -395,12 +535,12 @@ void SZ_Write (sizebuf_t *buf, const void *data, int length)
 // all of darkplaces.
 
 static char *hexchar = "0123456789ABCDEF";
-void Com_HexDumpToConsole(const qbyte *data, int size)
+void Com_HexDumpToConsole(const unsigned char *data, int size)
 {
        int i, j, n;
        char text[1024];
        char *cur, *flushpointer;
-       const qbyte *d;
+       const unsigned char *d;
        cur = text;
        flushpointer = text + 512;
        for (i = 0;i < size;)
@@ -428,7 +568,7 @@ void Com_HexDumpToConsole(const qbyte *data, int size)
                                *cur++ = ' ';
                                *cur++ = ' ';
                        }
-                       if ((j & 3) == 0)
+                       if ((j & 3) == 3)
                                *cur++ = ' ';
                }
                // print text
@@ -487,7 +627,11 @@ int COM_ParseToken(const char **datapointer, int returnnewline)
 
 // skip whitespace
 skipwhite:
-       for (;*data <= ' ' && (*data != '\n' || !returnnewline);data++)
+       // line endings:
+       // UNIX: \n
+       // Mac: \r
+       // Windows: \r\n
+       for (;*data <= ' ' && ((*data != '\n' && *data != '\r') || !returnnewline);data++)
        {
                if (*data == 0)
                {
@@ -497,10 +641,14 @@ skipwhite:
                }
        }
 
+       // handle Windows line ending
+       if (data[0] == '\r' && data[1] == '\n')
+               data++;
+
        if (data[0] == '/' && data[1] == '/')
        {
                // comment
-               while (*data && *data != '\n')
+               while (*data && *data != '\n' && *data != '\r')
                        data++;
                goto skipwhite;
        }
@@ -518,6 +666,8 @@ skipwhite:
                // quoted string
                for (data++;*data != '\"';data++)
                {
+                       if (*data == '\\' && data[1] == '"' )
+                               data++;
                        if (!*data || len >= (int)sizeof(com_token) - 1)
                        {
                                com_token[0] = 0;
@@ -530,6 +680,33 @@ skipwhite:
                *datapointer = data+1;
                return true;
        }
+       else if (*data == '\'')
+       {
+               // quoted string
+               for (data++;*data != '\'';data++)
+               {
+                       if (*data == '\\' && data[1] == '\'' )
+                               data++;
+                       if (!*data || len >= (int)sizeof(com_token) - 1)
+                       {
+                               com_token[0] = 0;
+                               *datapointer = NULL;
+                               return false;
+                       }
+                       com_token[len++] = *data;
+               }
+               com_token[len] = 0;
+               *datapointer = data+1;
+               return true;
+       }
+       else if (*data == '\r')
+       {
+               // translate Mac line ending to UNIX
+               com_token[len++] = '\n';
+               com_token[len] = 0;
+               *datapointer = data;
+               return true;
+       }
        else if (*data == '\n' || *data == '{' || *data == '}' || *data == ')' || *data == '(' || *data == ']' || *data == '[' || *data == '\'' || *data == ':' || *data == ',' || *data == ';')
        {
                // single character
@@ -541,7 +718,7 @@ skipwhite:
        else
        {
                // regular word
-               for (;*data > ' ' && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != '\'' && *data != ':' && *data != ',' && *data != ';';data++)
+               for (;*data > ' ' && *data != '{' && *data != '}' && *data != ')' && *data != '(' && *data != ']' && *data != '[' && *data != '\'' && *data != ':' && *data != ',' && *data != ';' && *data != '\'' && *data != '"';data++)
                {
                        if (len >= (int)sizeof(com_token) - 1)
                        {
@@ -593,7 +770,7 @@ skipwhite:
        if (*data == '/' && data[1] == '/')
        {
                // comment
-               while (*data && *data != '\n')
+               while (*data && *data != '\n' && *data != '\r')
                        data++;
                goto skipwhite;
        }
@@ -612,7 +789,6 @@ skipwhite:
                }
                com_token[len] = 0;
                *datapointer = data+1;
-               return true;
        }
        else
        {
@@ -629,8 +805,9 @@ skipwhite:
                }
                com_token[len] = 0;
                *datapointer = data;
-               return true;
        }
+
+       return true;
 }
 
 
@@ -671,7 +848,7 @@ void COM_CheckRegistered (void)
 {
        Cvar_Set ("cmdline", com_cmdline);
 
-       if (!FS_FileExists("gfx/pop.lmp"))
+       if (gamemode == GAME_NORMAL && !FS_FileExists("gfx/pop.lmp"))
        {
                if (fs_modified)
                        Con_Print("Playing shareware version, with modification.\nwarning: most mods require full quake data.\n");
@@ -698,8 +875,19 @@ void COM_InitArgv (void)
        for (j = 0;(j < MAX_NUM_ARGVS) && (j < com_argc);j++)
        {
                i = 0;
-               while ((n < (CMDLINE_LENGTH - 1)) && com_argv[j][i])
-                       com_cmdline[n++] = com_argv[j][i++];
+               if (strstr(com_argv[j], " "))
+               {
+                       // arg contains whitespace, store quotes around it
+                       com_cmdline[n++] = '\"';
+                       while ((n < (CMDLINE_LENGTH - 1)) && com_argv[j][i])
+                               com_cmdline[n++] = com_argv[j][i++];
+                       com_cmdline[n++] = '\"';
+               }
+               else
+               {
+                       while ((n < (CMDLINE_LENGTH - 1)) && com_argv[j][i])
+                               com_cmdline[n++] = com_argv[j][i++];
+               }
                if (n < (CMDLINE_LENGTH - 1))
                        com_cmdline[n++] = ' ';
                else
@@ -713,51 +901,80 @@ void COM_InitArgv (void)
 
 // Game mods
 
-typedef struct
+typedef struct gamemode_info_s
 {
        const char* prog_name;
        const char* cmdline;
        const char* gamename;
-       const char* gamedirname;
+       const char* gamedirname1;
+       const char* gamedirname2;
        const char* gamescreenshotname;
+       const char* gameuserdirname;
 } gamemode_info_t;
 
 static const gamemode_info_t gamemode_info [] =
 {// prog_name          cmdline                 gamename                                gamedirname     gamescreenshotname
 
 // GAME_NORMAL
-{ "",                          "-quake",               "DarkPlaces-Quake",             "",                     "dp" },
+// COMMANDLINEOPTION: Game: -quake runs the game Quake (default)
+{ "",                          "-quake",               "DarkPlaces-Quake",             "id1",          NULL,                   "dp",                   "darkplaces" },
 // GAME_HIPNOTIC
-{ "hipnotic",          "-hipnotic",    "Darkplaces-Hipnotic",  "hipnotic",     "dp" },
+// COMMANDLINEOPTION: Game: -hipnotic runs Quake mission pack 1: The Scourge of Armagon
+{ "hipnotic",          "-hipnotic",    "Darkplaces-Hipnotic",  "id1",          "hipnotic",             "dp",                   "darkplaces" },
 // GAME_ROGUE
-{ "rogue",                     "-rogue",               "Darkplaces-Rogue",             "rogue",        "dp" },
+// COMMANDLINEOPTION: Game: -rogue runs Quake mission pack 2: The Dissolution of Eternity
+{ "rogue",                     "-rogue",               "Darkplaces-Rogue",             "id1",          "rogue",                "dp",                   "darkplaces" },
 // GAME_NEHAHRA
-{ "nehahra",           "-nehahra",             "DarkPlaces-Nehahra",   "nehahra",      "dp" },
+// COMMANDLINEOPTION: Game: -nehahra runs The Seal of Nehahra movie and game
+{ "nehahra",           "-nehahra",             "DarkPlaces-Nehahra",   "id1",          "nehahra",              "dp",                   "darkplaces" },
 // GAME_NEXUIZ
-{ "nexuiz",                    "-nexuiz",              "Nexuiz",                               "data",         "nexuiz" },
+// COMMANDLINEOPTION: Game: -nexuiz runs the multiplayer game Nexuiz
+{ "nexuiz",                    "-nexuiz",              "Nexuiz",                               "data",         NULL,                   "nexuiz",               "nexuiz" },
 // GAME_TRANSFUSION
-{ "transfusion",       "-transfusion", "Transfusion",                  "basetf",       "transfusion" },
+// COMMANDLINEOPTION: Game: -transfusion runs Transfusion (the recreation of Blood in Quake)
+{ "transfusion",       "-transfusion", "Transfusion",                  "basetf",       NULL,                   "transfusion",  "transfusion" },
 // GAME_GOODVSBAD2
-{ "gvb2",                      "-goodvsbad2",  "GoodVs.Bad2",                  "rts",          "gvb2" },
+// COMMANDLINEOPTION: Game: -goodvsbad2 runs the psychadelic RTS FPS game Good Vs Bad 2
+{ "gvb2",                      "-goodvsbad2",  "GoodVs.Bad2",                  "rts",          NULL,                   "gvb2",                 "gvb2" },
 // GAME_TEU
-{ "teu",                       "-teu",                 "TheEvilUnleashed",             "baseteu",      "teu" },
+// COMMANDLINEOPTION: Game: -teu runs The Evil Unleashed (this option is obsolete as they are not using darkplaces)
+{ "teu",                       "-teu",                 "TheEvilUnleashed",             "baseteu",      NULL,                   "teu",                  "teu" },
 // GAME_BATTLEMECH
-{ "battlemech",                "-battlemech",  "Battlemech",                   "base",         "battlemech" },
+// COMMANDLINEOPTION: Game: -battlemech runs the multiplayer topdown deathmatch game BattleMech
+{ "battlemech",                "-battlemech",  "Battlemech",                   "base",         NULL,                   "battlemech",   "battlemech" },
 // GAME_ZYMOTIC
-{ "zymotic",           "-zymotic",             "Zymotic",                              "data",         "zymotic" },
+// COMMANDLINEOPTION: Game: -zymotic runs the singleplayer game Zymotic
+{ "zymotic",           "-zymotic",             "Zymotic",                              "basezym",              NULL,                   "zymotic",              "zymotic" },
 // GAME_FNIGGIUM
-{ "fniggium",          "-fniggium",    "Fniggium",                             "data",         "fniggium" },
+// COMMANDLINEOPTION: Game: -fniggium runs the post apocalyptic melee RPG Fniggium
+{ "fniggium",          "-fniggium",    "Fniggium",                             "data",         NULL,                   "fniggium",             "fniggium" },
 // GAME_SETHERAL
-{ "setheral",          "-setheral",    "Setheral",                             "data",         "setheral" },
+// COMMANDLINEOPTION: Game: -setheral runs the multiplayer game Setheral
+{ "setheral",          "-setheral",    "Setheral",                             "data",         NULL,                   "setheral",             "setheral" },
 // GAME_SOM
-{ "som",                       "-som",                 "Son of Man",                   "sonofman",     "som" },
+// COMMANDLINEOPTION: Game: -som runs the multiplayer game Son Of Man
+{ "som",                       "-som",                 "Son of Man",                   "id1",          "sonofman",             "som",                  "darkplaces" },
 // GAME_TENEBRAE
-{ "tenebrae",          "-tenebrae",    "DarkPlaces-Tenebrae",  "tenebrae",     "dp" },
+// COMMANDLINEOPTION: Game: -tenebrae runs the graphics test mod known as Tenebrae (some features not implemented)
+{ "tenebrae",          "-tenebrae",    "DarkPlaces-Tenebrae",  "id1",          "tenebrae",             "dp",                   "darkplaces" },
 // GAME_NEOTERIC
-{ "neoteric",          "-neoteric",    "Neoteric",                             "neobase",      "neo" },
+// COMMANDLINEOPTION: Game: -neoteric runs the game Neoteric
+{ "neoteric",          "-neoteric",    "Neoteric",                             "id1",          "neobase",              "neo",                  "darkplaces" },
 // GAME_OPENQUARTZ
-{ "openquartz",                "-openquartz",  "OpenQuartz",                   "id1",          "openquartz"},
-
+// COMMANDLINEOPTION: Game: -openquartz runs the game OpenQuartz, a standalone GPL replacement of the quake content
+{ "openquartz",                "-openquartz",  "OpenQuartz",                   "id1",          NULL,                   "openquartz",   "darkplaces" },
+// GAME_PRYDON
+// COMMANDLINEOPTION: Game: -prydon runs the topdown point and click action-RPG Prydon Gate
+{ "prydon",                    "-prydon",              "PrydonGate",                   "id1",          "prydon",               "prydon",               "darkplaces" },
+// GAME_NETHERWORLD
+// COMMANDLINEOPTION: Game: -netherworld runs the game Netherworld: Dark Master
+{ "netherworld",       "-netherworld", "Netherworld: Dark Master",     "id1",          "netherworld",  "nw",                   "darkplaces" },
+// GAME_THEHUNTED
+// COMMANDLINEOPTION: Game: -thehunted runs the game The Hunted
+{ "thehunted",         "-thehunted",   "The Hunted",                   "thdata",       NULL,                   "th",                   "thehunted" },
+// GAME_DEFEATINDETAIL2
+// COMMANDLINEOPTION: Game: -did2 runs the game Defeat In Detail 2
+{ "did2",                      "-did2",                "Defeat In Detail 2",   "data",         NULL,                   "did2_",                "did2" },
 };
 
 void COM_InitGameType (void)
@@ -773,7 +990,7 @@ void COM_InitGameType (void)
        for (i = 1; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
                if (strstr (name, gamemode_info[i].prog_name))
                {
-                       gamemode = i;
+                       gamemode = (gamemode_t)i;
                        break;
                }
 
@@ -781,37 +998,29 @@ void COM_InitGameType (void)
        for (i = 0; i < sizeof (gamemode_info) / sizeof (gamemode_info[0]); i++)
                if (COM_CheckParm (gamemode_info[i].cmdline))
                {
-                       gamemode = i;
+                       gamemode = (gamemode_t)i;
                        break;
                }
 
        gamename = gamemode_info[gamemode].gamename;
-       gamedirname = gamemode_info[gamemode].gamedirname;
+       gamedirname1 = gamemode_info[gamemode].gamedirname1;
+       gamedirname2 = gamemode_info[gamemode].gamedirname2;
        gamescreenshotname = gamemode_info[gamemode].gamescreenshotname;
+       gameuserdirname = gamemode_info[gamemode].gameuserdirname;
 }
 
 
-extern void Mathlib_Init(void);
-extern void FS_Init (void);
-
 /*
 ================
 COM_Init
 ================
 */
-void COM_Init (void)
+void COM_Init_Commands (void)
 {
        Cvar_RegisterVariable (&registered);
        Cvar_RegisterVariable (&cmdline);
-
-       Mathlib_Init();
-
-       FS_Init ();
-       Log_Init ();
-       COM_CheckRegistered ();
 }
 
-
 /*
 ============
 va
@@ -831,13 +1040,54 @@ char *va(const char *format, ...)
        s = string[stringindex];
        stringindex = (stringindex + 1) & 7;
        va_start (argptr, format);
-       vsnprintf (s, sizeof (string[0]), format,argptr);
+       dpvsnprintf (s, sizeof (string[0]), format,argptr);
        va_end (argptr);
 
        return s;
 }
 
 
+//======================================
+
+// snprintf and vsnprintf are NOT portable. Use their DP counterparts instead
+
+#undef snprintf
+#undef vsnprintf
+
+#ifdef WIN32
+# define snprintf _snprintf
+# define vsnprintf _vsnprintf
+#endif
+
+
+int dpsnprintf (char *buffer, size_t buffersize, const char *format, ...)
+{
+       va_list args;
+       int result;
+
+       va_start (args, format);
+       result = dpvsnprintf (buffer, buffersize, format, args);
+       va_end (args);
+
+       return result;
+}
+
+
+int dpvsnprintf (char *buffer, size_t buffersize, const char *format, va_list args)
+{
+       int result;
+
+       result = vsnprintf (buffer, buffersize, format, args);
+       if (result < 0 || (size_t)result >= buffersize)
+       {
+               buffer[buffersize - 1] = '\0';
+               return -1;
+       }
+
+       return result;
+}
+
+
 //======================================
 
 void COM_ToLowerString (const char *in, char *out, size_t size_out)
@@ -890,14 +1140,14 @@ int COM_ReadAndTokenizeLine(const char **text, char **argv, int maxargc, char *t
        l = *text;
        commentprefixlength = 0;
        if (commentprefix)
-               commentprefixlength = strlen(commentprefix);
-       while (*l && *l != '\n')
+               commentprefixlength = (int)strlen(commentprefix);
+       while (*l && *l != '\n' && *l != '\r')
        {
                if (*l > ' ')
                {
                        if (commentprefixlength && !strncmp(l, commentprefix, commentprefixlength))
                        {
-                               while (*l && *l != '\n')
+                               while (*l && *l != '\n' && *l != '\r')
                                        l++;
                                break;
                        }
@@ -932,6 +1182,12 @@ int COM_ReadAndTokenizeLine(const char **text, char **argv, int maxargc, char *t
                else
                        l++;
        }
+       // line endings:
+       // UNIX: \n
+       // Mac: \r
+       // Windows: \r\n
+       if (*l == '\r')
+               l++;
        if (*l == '\n')
                l++;
        *text = l;