common.c

Go to the documentation of this file.

/*
Copyright (C) 1997-2001 Id Software, Inc.
Copyright (C) 2018-2019 Krzysztof Kondrak
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
// common.c -- misc functions used in client and server
#include "qcommon.h"
#include <setjmp.h>
 
#define MAXPRINTMSG 8192
 
#define MAX_NUM_ARGVS   50
 
 
int     com_argc;
char    *com_argv[MAX_NUM_ARGVS+1];
 
int     realtime;
 
jmp_buf abortframe;     // an ERR_DROP occured, exit the entire frame
static qboolean shutdown_game = false;
 
FILE    *log_stats_file;
 
cvar_t  *host_speeds;
cvar_t  *log_stats;
cvar_t  *developer;
cvar_t  *timescale;
cvar_t  *fixedtime;
cvar_t  *logfile_active;    // 1 = buffer log, 2 = flush after each print
cvar_t  *showtrace;
cvar_t  *dedicated;
 
FILE    *logfile;
 
int         server_state;
 
// host_speeds times
int     time_before_game;
int     time_after_game;
int     time_before_ref;
int     time_after_ref;
 
/*
============================================================================
 
CLIENT / SERVER interactions
 
============================================================================
*/
 
static int  rd_target;
static char *rd_buffer;
static int  rd_buffersize;
static void (*rd_flush)(int target, char *buffer);
 
extern void SV_ShutdownGameProgs(void);
 
void Com_BeginRedirect (int target, char *buffer, int buffersize, void (*flush))
{
    if (!target || !buffer || !buffersize || !flush)
        return;
    rd_target = target;
    rd_buffer = buffer;
    rd_buffersize = buffersize;
    rd_flush = flush;
 
    *rd_buffer = 0;
}
 
void Com_EndRedirect (void)
{
    rd_flush(rd_target, rd_buffer);
 
    rd_target = 0;
    rd_buffer = NULL;
    rd_buffersize = 0;
    rd_flush = NULL;
}
 
/*
=============
Com_Printf
 
Both client and server can use this, and it will output
to the apropriate place.
=============
*/
void Com_Printf (char *fmt, ...)
{
    va_list     argptr;
    char        msg[MAXPRINTMSG];
 
    va_start (argptr,fmt);
    vsnprintf (msg,MAXPRINTMSG,fmt,argptr);
    va_end (argptr);
 
    if (rd_target)
    {
        if ((strlen (msg) + strlen(rd_buffer)) > (rd_buffersize - 1))
        {
            rd_flush(rd_target, rd_buffer);
            *rd_buffer = 0;
        }
        strcat (rd_buffer, msg);
        return;
    }
 
    Con_Print (msg);
        
    // also echo to debugging console
    Sys_ConsoleOutput (msg);
 
    // logfile
    if (logfile_active && logfile_active->value)
    {
        char    name[MAX_QPATH];
        
        if (!logfile)
        {
            Com_sprintf (name, sizeof(name), "%s/qconsole.log", FS_Gamedir ());
            if (logfile_active->value > 2)
                logfile = fopen (name, "a");
            else
                logfile = fopen (name, "w");
        }
        if (logfile)
            fprintf (logfile, "%s", msg);
        if (logfile_active->value > 1)
            fflush (logfile);       // force it to save every time
    }
}
 
 
/*
================
Com_DPrintf
 
A Com_Printf that only shows up if the "developer" cvar is set
================
*/
void Com_DPrintf (char *fmt, ...)
{
    va_list     argptr;
    char        msg[MAXPRINTMSG];
        
    if (!developer || !developer->value)
        return;         // don't confuse non-developers with techie stuff...
 
    va_start (argptr,fmt);
    vsnprintf (msg,MAXPRINTMSG,fmt,argptr);
    va_end (argptr);
    
    Com_Printf ("%s", msg);
}
 
 
/*
=============
Com_Error
 
Both client and server can use this, and it will
do the apropriate things.
=============
*/
void Com_Error (int code, char *fmt, ...)
{
    va_list     argptr;
    static char     msg[MAXPRINTMSG];
    static  qboolean    recursive;
 
    if (recursive)
        Sys_Error ("recursive error after: %s", msg);
    recursive = true;
 
    va_start (argptr,fmt);
    vsnprintf (msg,MAXPRINTMSG,fmt,argptr);
    va_end (argptr);
    
    if (code == ERR_DISCONNECT)
    {
        CL_Drop ();
        recursive = false;
        longjmp (abortframe, -1);
    }
    else if (code == ERR_DROP)
    {
        Com_Printf ("********************\nERROR: %s\n********************\n", msg);
        SV_Shutdown (va("Server crashed: %s\n", msg), false);
        CL_Drop ();
        recursive = false;
        shutdown_game = true;
        longjmp (abortframe, -1);
    }
    else
    {
        SV_Shutdown (va("Server fatal crashed: %s\n", msg), false);
        SV_ShutdownGameProgs();
        CL_Shutdown ();
    }
 
    if (logfile)
    {
        fclose (logfile);
        logfile = NULL;
    }
 
    Sys_Error ("%s", msg);
}
 
 
/*
=============
Com_Quit
 
Both client and server can use this, and it will
do the apropriate things.
=============
*/
void Com_Quit (void)
{
    SV_Shutdown ("Server quit\n", false);
    SV_ShutdownGameProgs();
    CL_Shutdown ();
 
    if (logfile)
    {
        fclose (logfile);
        logfile = NULL;
    }
 
    Sys_Quit ();
}
 
 
/*
==================
Com_ServerState
==================
*/
int Com_ServerState (void)
{
    return server_state;
}
 
/*
==================
Com_SetServerState
==================
*/
void Com_SetServerState (int state)
{
    server_state = state;
}
 
 
/*
==============================================================================
 
            MESSAGE IO FUNCTIONS
 
Handles byte ordering and avoids alignment errors
==============================================================================
*/
 
vec3_t  bytedirs[NUMVERTEXNORMALS] =
{
#include "../client/anorms.h"
};
 
//
// writing functions
//
 
void MSG_WriteChar (sizebuf_t *sb, int c)
{
    byte    *buf;
    
#ifdef PARANOID
    if (c < -128 || c > 127)
        Com_Error (ERR_FATAL, "MSG_WriteChar: range error");
#endif
 
    buf = SZ_GetSpace (sb, 1);
    buf[0] = c;
}
 
void MSG_WriteByte (sizebuf_t *sb, int c)
{
    byte    *buf;
    
#ifdef PARANOID
    if (c < 0 || c > 255)
        Com_Error (ERR_FATAL, "MSG_WriteByte: range error");
#endif
 
    buf = SZ_GetSpace (sb, 1);
    buf[0] = c;
}
 
void MSG_WriteShort (sizebuf_t *sb, int c)
{
    byte    *buf;
    
#ifdef PARANOID
    if (c < ((short)0x8000) || c > (short)0x7fff)
        Com_Error (ERR_FATAL, "MSG_WriteShort: range error");
#endif
 
    buf = SZ_GetSpace (sb, 2);
    buf[0] = c&0xff;
    buf[1] = c>>8;
}
 
void MSG_WriteLong (sizebuf_t *sb, int c)
{
    byte    *buf;
    
    buf = SZ_GetSpace (sb, 4);
    buf[0] = c&0xff;
    buf[1] = (c>>8)&0xff;
    buf[2] = (c>>16)&0xff;
    buf[3] = c>>24;
}
 
void MSG_WriteFloat (sizebuf_t *sb, float f)
{
    union
    {
        float   f;
        int l;
    } dat;
    
    
    dat.f = f;
    dat.l = LittleLong (dat.l);
    
    SZ_Write (sb, &dat.l, 4);
}
 
void MSG_WriteString (sizebuf_t *sb, char *s)
{
    if (!s)
        SZ_Write (sb, "", 1);
    else
        SZ_Write (sb, s, (int)strlen(s)+1);
}
 
void MSG_WriteCoord (sizebuf_t *sb, float f)
{
    MSG_WriteShort (sb, (int)(f*8));
}
 
void MSG_WritePos (sizebuf_t *sb, vec3_t pos)
{
    MSG_WriteShort (sb, (int)(pos[0]*8));
    MSG_WriteShort (sb, (int)(pos[1]*8));
    MSG_WriteShort (sb, (int)(pos[2]*8));
}
 
void MSG_WriteAngle (sizebuf_t *sb, float f)
{
    MSG_WriteByte (sb, (int)(f*256/360) & 255);
}
 
void MSG_WriteAngle16 (sizebuf_t *sb, float f)
{
    MSG_WriteShort (sb, ANGLE2SHORT(f));
}
 
 
void MSG_WriteDeltaUsercmd (sizebuf_t *buf, usercmd_t *from, usercmd_t *cmd)
{
    int     bits;
 
//
// send the movement message
//
    bits = 0;
    if (cmd->angles[0] != from->angles[0])
        bits |= CM_ANGLE1;
    if (cmd->angles[1] != from->angles[1])
        bits |= CM_ANGLE2;
    if (cmd->angles[2] != from->angles[2])
        bits |= CM_ANGLE3;
    if (cmd->forwardmove != from->forwardmove)
        bits |= CM_FORWARD;
    if (cmd->sidemove != from->sidemove)
        bits |= CM_SIDE;
    if (cmd->upmove != from->upmove)
        bits |= CM_UP;
    if (cmd->buttons != from->buttons)
        bits |= CM_BUTTONS;
    if (cmd->impulse != from->impulse)
        bits |= CM_IMPULSE;
 
    MSG_WriteByte (buf, bits);
 
    if (bits & CM_ANGLE1)
        MSG_WriteShort (buf, cmd->angles[0]);
    if (bits & CM_ANGLE2)
        MSG_WriteShort (buf, cmd->angles[1]);
    if (bits & CM_ANGLE3)
        MSG_WriteShort (buf, cmd->angles[2]);
    
    if (bits & CM_FORWARD)
        MSG_WriteShort (buf, cmd->forwardmove);
    if (bits & CM_SIDE)
        MSG_WriteShort (buf, cmd->sidemove);
    if (bits & CM_UP)
        MSG_WriteShort (buf, cmd->upmove);
 
    if (bits & CM_BUTTONS)
        MSG_WriteByte (buf, cmd->buttons);
    if (bits & CM_IMPULSE)
        MSG_WriteByte (buf, cmd->impulse);
 
    MSG_WriteByte (buf, cmd->msec);
    MSG_WriteByte (buf, cmd->lightlevel);
}
 
 
void MSG_WriteDir (sizebuf_t *sb, vec3_t dir)
{
    int     i, best;
    float   d, bestd;
    
    if (!dir)
    {
        MSG_WriteByte (sb, 0);
        return;
    }
 
    bestd = 0;
    best = 0;
    for (i=0 ; i<NUMVERTEXNORMALS ; i++)
    {
        d = DotProduct (dir, bytedirs[i]);
        if (d > bestd)
        {
            bestd = d;
            best = i;
        }
    }
    MSG_WriteByte (sb, best);
}
 
 
void MSG_ReadDir (sizebuf_t *sb, vec3_t dir)
{
    int     b;
 
    b = MSG_ReadByte (sb);
    if (b >= NUMVERTEXNORMALS)
        Com_Error (ERR_DROP, "MSF_ReadDir: out of range");
    VectorCopy (bytedirs[b], dir);
}
 
 
/*
==================
MSG_WriteDeltaEntity
 
Writes part of a packetentities message.
Can delta from either a baseline or a previous packet_entity
==================
*/
void MSG_WriteDeltaEntity (entity_state_t *from, entity_state_t *to, sizebuf_t *msg, qboolean force, qboolean newentity)
{
    int     bits;
 
    if (!to->number)
        Com_Error (ERR_FATAL, "Unset entity number");
    if (to->number >= MAX_EDICTS)
        Com_Error (ERR_FATAL, "Entity number >= MAX_EDICTS");
 
// send an update
    bits = 0;
 
    if (to->number >= 256)
        bits |= U_NUMBER16;     // number8 is implicit otherwise
 
    if (to->origin[0] != from->origin[0])
        bits |= U_ORIGIN1;
    if (to->origin[1] != from->origin[1])
        bits |= U_ORIGIN2;
    if (to->origin[2] != from->origin[2])
        bits |= U_ORIGIN3;
 
    if ( to->angles[0] != from->angles[0] )
        bits |= U_ANGLE1;       
    if ( to->angles[1] != from->angles[1] )
        bits |= U_ANGLE2;
    if ( to->angles[2] != from->angles[2] )
        bits |= U_ANGLE3;
        
    if ( to->skinnum != from->skinnum )
    {
        if ((unsigned)to->skinnum < 256)
            bits |= U_SKIN8;
        else if ((unsigned)to->skinnum < 0x10000)
            bits |= U_SKIN16;
        else
            bits |= (U_SKIN8|U_SKIN16);
    }
        
    if ( to->frame != from->frame )
    {
        if (to->frame < 256)
            bits |= U_FRAME8;
        else
            bits |= U_FRAME16;
    }
 
    if ( to->effects != from->effects )
    {
        if (to->effects < 256)
            bits |= U_EFFECTS8;
        else if (to->effects < 0x8000)
            bits |= U_EFFECTS16;
        else
            bits |= U_EFFECTS8|U_EFFECTS16;
    }
    
    if ( to->renderfx != from->renderfx )
    {
        if (to->renderfx < 256)
            bits |= U_RENDERFX8;
        else if (to->renderfx < 0x8000)
            bits |= U_RENDERFX16;
        else
            bits |= U_RENDERFX8|U_RENDERFX16;
    }
    
    if ( to->solid != from->solid )
        bits |= U_SOLID;
 
    // event is not delta compressed, just 0 compressed
    if ( to->event  )
        bits |= U_EVENT;
    
    if ( to->modelindex != from->modelindex )
        bits |= U_MODEL;
    if ( to->modelindex2 != from->modelindex2 )
        bits |= U_MODEL2;
    if ( to->modelindex3 != from->modelindex3 )
        bits |= U_MODEL3;
    if ( to->modelindex4 != from->modelindex4 )
        bits |= U_MODEL4;
 
    if ( to->sound != from->sound )
        bits |= U_SOUND;
 
    if (newentity || (to->renderfx & RF_BEAM))
        bits |= U_OLDORIGIN;
 
    //
    // write the message
    //
    if (!bits && !force)
        return;     // nothing to send!
 
    //----------
 
    if (bits & 0xff000000)
        bits |= U_MOREBITS3 | U_MOREBITS2 | U_MOREBITS1;
    else if (bits & 0x00ff0000)
        bits |= U_MOREBITS2 | U_MOREBITS1;
    else if (bits & 0x0000ff00)
        bits |= U_MOREBITS1;
 
    MSG_WriteByte (msg, bits&255 );
 
    if (bits & 0xff000000)
    {
        MSG_WriteByte (msg, (bits>>8)&255 );
        MSG_WriteByte (msg, (bits>>16)&255 );
        MSG_WriteByte (msg, (bits>>24)&255 );
    }
    else if (bits & 0x00ff0000)
    {
        MSG_WriteByte (msg, (bits>>8)&255 );
        MSG_WriteByte (msg, (bits>>16)&255 );
    }
    else if (bits & 0x0000ff00)
    {
        MSG_WriteByte (msg, (bits>>8)&255 );
    }
 
    //----------
 
    if (bits & U_NUMBER16)
        MSG_WriteShort (msg, to->number);
    else
        MSG_WriteByte (msg, to->number);
 
    if (bits & U_MODEL)
        MSG_WriteByte (msg, to->modelindex);
    if (bits & U_MODEL2)
        MSG_WriteByte (msg, to->modelindex2);
    if (bits & U_MODEL3)
        MSG_WriteByte (msg, to->modelindex3);
    if (bits & U_MODEL4)
        MSG_WriteByte (msg, to->modelindex4);
 
    if (bits & U_FRAME8)
        MSG_WriteByte (msg, to->frame);
    if (bits & U_FRAME16)
        MSG_WriteShort (msg, to->frame);
 
    if ((bits & U_SKIN8) && (bits & U_SKIN16))      //used for laser colors
        MSG_WriteLong (msg, to->skinnum);
    else if (bits & U_SKIN8)
        MSG_WriteByte (msg, to->skinnum);
    else if (bits & U_SKIN16)
        MSG_WriteShort (msg, to->skinnum);
 
 
    if ( (bits & (U_EFFECTS8|U_EFFECTS16)) == (U_EFFECTS8|U_EFFECTS16) )
        MSG_WriteLong (msg, to->effects);
    else if (bits & U_EFFECTS8)
        MSG_WriteByte (msg, to->effects);
    else if (bits & U_EFFECTS16)
        MSG_WriteShort (msg, to->effects);
 
    if ( (bits & (U_RENDERFX8|U_RENDERFX16)) == (U_RENDERFX8|U_RENDERFX16) )
        MSG_WriteLong (msg, to->renderfx);
    else if (bits & U_RENDERFX8)
        MSG_WriteByte (msg, to->renderfx);
    else if (bits & U_RENDERFX16)
        MSG_WriteShort (msg, to->renderfx);
 
    if (bits & U_ORIGIN1)
        MSG_WriteCoord (msg, to->origin[0]);        
    if (bits & U_ORIGIN2)
        MSG_WriteCoord (msg, to->origin[1]);
    if (bits & U_ORIGIN3)
        MSG_WriteCoord (msg, to->origin[2]);
 
    if (bits & U_ANGLE1)
        MSG_WriteAngle(msg, to->angles[0]);
    if (bits & U_ANGLE2)
        MSG_WriteAngle(msg, to->angles[1]);
    if (bits & U_ANGLE3)
        MSG_WriteAngle(msg, to->angles[2]);
 
    if (bits & U_OLDORIGIN)
    {
        MSG_WriteCoord (msg, to->old_origin[0]);
        MSG_WriteCoord (msg, to->old_origin[1]);
        MSG_WriteCoord (msg, to->old_origin[2]);
    }
 
    if (bits & U_SOUND)
        MSG_WriteByte (msg, to->sound);
    if (bits & U_EVENT)
        MSG_WriteByte (msg, to->event);
    if (bits & U_SOLID)
        MSG_WriteShort (msg, to->solid);
}
 
 
//============================================================
 
//
// reading functions
//
 
void MSG_BeginReading (sizebuf_t *msg)
{
    msg->readcount = 0;
}
 
// returns -1 if no more characters are available
int MSG_ReadChar (sizebuf_t *msg_read)
{
    int c;
    
    if (msg_read->readcount+1 > msg_read->cursize)
        c = -1;
    else
        c = (signed char)msg_read->data[msg_read->readcount];
    msg_read->readcount++;
    
    return c;
}
 
int MSG_ReadByte (sizebuf_t *msg_read)
{
    int c;
    
    if (msg_read->readcount+1 > msg_read->cursize)
        c = -1;
    else
        c = (unsigned char)msg_read->data[msg_read->readcount];
    msg_read->readcount++;
    
    return c;
}
 
int MSG_ReadShort (sizebuf_t *msg_read)
{
    int c;
    
    if (msg_read->readcount+2 > msg_read->cursize)
        c = -1;
    else        
        c = (short)(msg_read->data[msg_read->readcount]
        + (msg_read->data[msg_read->readcount+1]<<8));
    
    msg_read->readcount += 2;
    
    return c;
}
 
int MSG_ReadLong (sizebuf_t *msg_read)
{
    int c;
    
    if (msg_read->readcount+4 > msg_read->cursize)
        c = -1;
    else
        c = msg_read->data[msg_read->readcount]
        + (msg_read->data[msg_read->readcount+1]<<8)
        + (msg_read->data[msg_read->readcount+2]<<16)
        + (msg_read->data[msg_read->readcount+3]<<24);
    
    msg_read->readcount += 4;
    
    return c;
}
 
float MSG_ReadFloat (sizebuf_t *msg_read)
{
    union
    {
        byte    b[4];
        float   f;
        int l;
    } dat;
    
    if (msg_read->readcount+4 > msg_read->cursize)
        dat.f = -1;
    else
    {
        dat.b[0] =  msg_read->data[msg_read->readcount];
        dat.b[1] =  msg_read->data[msg_read->readcount+1];
        dat.b[2] =  msg_read->data[msg_read->readcount+2];
        dat.b[3] =  msg_read->data[msg_read->readcount+3];
    }
    msg_read->readcount += 4;
    
    dat.l = LittleLong (dat.l);
 
    return dat.f;   
}
 
char *MSG_ReadString (sizebuf_t *msg_read)
{
    static char string[2048];
    int     l,c;
    
    l = 0;
    do
    {
        c = MSG_ReadChar (msg_read);
        if (c == -1 || c == 0)
            break;
        string[l] = c;
        l++;
    } while (l < sizeof(string)-1);
    
    string[l] = 0;
    
    return string;
}
 
char *MSG_ReadStringLine (sizebuf_t *msg_read)
{
    static char string[2048];
    int     l,c;
    
    l = 0;
    do
    {
        c = MSG_ReadChar (msg_read);
        if (c == -1 || c == 0 || c == '\n')
            break;
        string[l] = c;
        l++;
    } while (l < sizeof(string)-1);
    
    string[l] = 0;
    
    return string;
}
 
float MSG_ReadCoord (sizebuf_t *msg_read)
{
    return MSG_ReadShort(msg_read) * (1.0/8);
}
 
void MSG_ReadPos (sizebuf_t *msg_read, vec3_t pos)
{
    pos[0] = MSG_ReadShort(msg_read) * (1.0/8);
    pos[1] = MSG_ReadShort(msg_read) * (1.0/8);
    pos[2] = MSG_ReadShort(msg_read) * (1.0/8);
}
 
float MSG_ReadAngle (sizebuf_t *msg_read)
{
    return MSG_ReadChar(msg_read) * (360.0/256);
}
 
float MSG_ReadAngle16 (sizebuf_t *msg_read)
{
    return SHORT2ANGLE(MSG_ReadShort(msg_read));
}
 
void MSG_ReadDeltaUsercmd (sizebuf_t *msg_read, usercmd_t *from, usercmd_t *move)
{
    int bits;
 
    memcpy (move, from, sizeof(*move));
 
    bits = MSG_ReadByte (msg_read);
        
// read current angles
    if (bits & CM_ANGLE1)
        move->angles[0] = MSG_ReadShort (msg_read);
    if (bits & CM_ANGLE2)
        move->angles[1] = MSG_ReadShort (msg_read);
    if (bits & CM_ANGLE3)
        move->angles[2] = MSG_ReadShort (msg_read);
        
// read movement
    if (bits & CM_FORWARD)
        move->forwardmove = MSG_ReadShort (msg_read);
    if (bits & CM_SIDE)
        move->sidemove = MSG_ReadShort (msg_read);
    if (bits & CM_UP)
        move->upmove = MSG_ReadShort (msg_read);
    
// read buttons
    if (bits & CM_BUTTONS)
        move->buttons = MSG_ReadByte (msg_read);
 
    if (bits & CM_IMPULSE)
        move->impulse = MSG_ReadByte (msg_read);
 
// read time to run command
    move->msec = MSG_ReadByte (msg_read);
 
// read the light level
    move->lightlevel = MSG_ReadByte (msg_read);
}
 
 
void MSG_ReadData (sizebuf_t *msg_read, void *data, int len)
{
    int     i;
 
    for (i=0 ; i<len ; i++)
        ((byte *)data)[i] = MSG_ReadByte (msg_read);
}
 
 
//===========================================================================
 
void SZ_Init (sizebuf_t *buf, byte *data, int length)
{
    memset (buf, 0, sizeof(*buf));
    buf->data = data;
    buf->maxsize = length;
}
 
void SZ_Clear (sizebuf_t *buf)
{
    buf->cursize = 0;
    buf->overflowed = false;
}
 
void *SZ_GetSpace (sizebuf_t *buf, int length)
{
    void    *data;
    
    if (buf->cursize + length > buf->maxsize)
    {
        if (!buf->allowoverflow)
            Com_Error (ERR_FATAL, "SZ_GetSpace: overflow without allowoverflow set");
        
        if (length > buf->maxsize)
            Com_Error (ERR_FATAL, "SZ_GetSpace: %i is > full buffer size", length);
            
        Com_Printf ("SZ_GetSpace: overflow\n");
        SZ_Clear (buf); 
        buf->overflowed = true;
    }
 
    data = buf->data + buf->cursize;
    buf->cursize += length;
    
    return data;
}
 
void SZ_Write (sizebuf_t *buf, void *data, int length)
{
    memcpy (SZ_GetSpace(buf,length),data,length);       
}
 
void SZ_Print (sizebuf_t *buf, char *data)
{
    int     len;
    
    len = (int)strlen(data)+1;
 
    if (buf->cursize)
    {
        if (buf->data[buf->cursize-1])
            memcpy ((byte *)SZ_GetSpace(buf, len),data,len); // no trailing 0
        else
            memcpy ((byte *)SZ_GetSpace(buf, len-1)-1,data,len); // write over trailing 0
    }
    else
        memcpy ((byte *)SZ_GetSpace(buf, len),data,len);
}
 
 
//============================================================================
 
 
/*
================
COM_CheckParm
 
Returns the position (1 to argc-1) in the program's argument list
where the given parameter apears, or 0 if not present
================
*/
int COM_CheckParm (char *parm)
{
    int     i;
    
    for (i=1 ; i<com_argc ; i++)
    {
        if (!strcmp (parm,com_argv[i]))
            return i;
    }
        
    return 0;
}
 
int COM_Argc (void)
{
    return com_argc;
}
 
char *COM_Argv (int arg)
{
    if (arg < 0 || arg >= com_argc || !com_argv[arg])
        return "";
    return com_argv[arg];
}
 
void COM_ClearArgv (int arg)
{
    if (arg < 0 || arg >= com_argc || !com_argv[arg])
        return;
    com_argv[arg] = "";
}
 
 
/*
================
COM_InitArgv
================
*/
void COM_InitArgv (int argc, char **argv)
{
    int     i;
 
    if (argc > MAX_NUM_ARGVS)
        Com_Error (ERR_FATAL, "argc > MAX_NUM_ARGVS");
    com_argc = argc;
    for (i=0 ; i<argc ; i++)
    {
        if (!argv[i] || strlen(argv[i]) >= MAX_TOKEN_CHARS )
            com_argv[i] = "";
        else
            com_argv[i] = argv[i];
    }
}
 
/*
================
COM_AddParm
 
Adds the given string at the end of the current argument list
================
*/
void COM_AddParm (char *parm)
{
    if (com_argc == MAX_NUM_ARGVS)
        Com_Error (ERR_FATAL, "COM_AddParm: MAX_NUM)ARGS");
    com_argv[com_argc++] = parm;
}
 
 
 
 
int memsearch (byte *start, int count, int search)
{
    int     i;
    
    for (i=0 ; i<count ; i++)
        if (start[i] == search)
            return i;
    return -1;
}
 
 
char *CopyString (char *in)
{
    char    *out;
    
    out = Z_Malloc ((int)strlen(in)+1);
    strcpy (out, in);
    return out;
}
 
 
 
void Info_Print (char *s)
{
    char    key[512];
    char    value[512];
    char    *o;
    int     l;
 
    if (*s == '\\')
        s++;
    while (*s)
    {
        o = key;
        while (*s && *s != '\\')
            *o++ = *s++;
 
        l = o - key;
        if (l < 20)
        {
            memset (o, ' ', 20-l);
            key[20] = 0;
        }
        else
            *o = 0;
        Com_Printf ("%s", key);
 
        if (!*s)
        {
            Com_Printf ("MISSING VALUE\n");
            return;
        }
 
        o = value;
        s++;
        while (*s && *s != '\\')
            *o++ = *s++;
        *o = 0;
 
        if (*s)
            s++;
        Com_Printf ("%s\n", value);
    }
}
 
 
/*
==============================================================================
 
                        ZONE MEMORY ALLOCATION
 
just cleared malloc with counters now...
 
==============================================================================
*/
 
#define Z_MAGIC     0x1d1d
 
 
typedef struct zhead_s
{
    struct zhead_s  *prev, *next;
    short   magic;
    short   tag;            // for group free
    int     size;
} zhead_t;
 
zhead_t     z_chain;
int     z_count, z_bytes;
 
/*
========================
Z_Free
========================
*/
void Z_Free (void *ptr)
{
    zhead_t *z;
 
    z = ((zhead_t *)ptr) - 1;
 
    if (z->magic != Z_MAGIC)
        Com_Error (ERR_FATAL, "Z_Free: bad magic");
 
    z->prev->next = z->next;
    z->next->prev = z->prev;
 
    z_count--;
    z_bytes -= z->size;
    free (z);
}
 
 
/*
========================
Z_Stats_f
========================
*/
void Z_Stats_f (void)
{
    Com_Printf ("%i bytes in %i blocks\n", z_bytes, z_count);
}
 
/*
========================
Z_FreeTags
========================
*/
void Z_FreeTags (int tag)
{
    zhead_t *z, *next;
 
    for (z=z_chain.next ; z != &z_chain ; z=next)
    {
        next = z->next;
        if (z->tag == tag)
            Z_Free ((void *)(z+1));
    }
}
 
/*
========================
Z_TagMalloc
========================
*/
void *Z_TagMalloc (int size, int tag)
{
    zhead_t *z;
    
    size = size + sizeof(zhead_t);
    z = malloc(size);
    if (!z)
        Com_Error (ERR_FATAL, "Z_Malloc: failed on allocation of %i bytes",size);
    memset (z, 0, size);
    z_count++;
    z_bytes += size;
    z->magic = Z_MAGIC;
    z->tag = tag;
    z->size = size;
 
    z->next = z_chain.next;
    z->prev = &z_chain;
    z_chain.next->prev = z;
    z_chain.next = z;
 
    return (void *)(z+1);
}
 
/*
========================
Z_Malloc
========================
*/
void *Z_Malloc (int size)
{
    return Z_TagMalloc (size, 0);
}
 
 
//============================================================================
 
 
/*
====================
COM_BlockSequenceCheckByte
 
For proxy protecting
 
// THIS IS MASSIVELY BROKEN!  CHALLENGE MAY BE NEGATIVE
// DON'T USE THIS FUNCTION!!!!!
 
====================
*/
byte    COM_BlockSequenceCheckByte (byte *base, int length, int sequence, int challenge)
{
    Sys_Error("COM_BlockSequenceCheckByte called\n");
 
#if 0
    int     checksum;
    byte    buf[68];
    byte    *p;
    float temp;
    byte c;
 
    temp = bytedirs[(sequence/3) % NUMVERTEXNORMALS][sequence % 3];
    temp = LittleFloat(temp);
    p = ((byte *)&temp);
 
    if (length > 60)
        length = 60;
    memcpy (buf, base, length);
 
    buf[length] = (sequence & 0xff) ^ p[0];
    buf[length+1] = p[1];
    buf[length+2] = ((sequence>>8) & 0xff) ^ p[2];
    buf[length+3] = p[3];
 
    temp = bytedirs[((sequence+challenge)/3) % NUMVERTEXNORMALS][(sequence+challenge) % 3];
    temp = LittleFloat(temp);
    p = ((byte *)&temp);
 
    buf[length+4] = (sequence & 0xff) ^ p[3];
    buf[length+5] = (challenge & 0xff) ^ p[2];
    buf[length+6] = ((sequence>>8) & 0xff) ^ p[1];
    buf[length+7] = ((challenge >> 7) & 0xff) ^ p[0];
 
    length += 8;
 
    checksum = LittleLong(Com_BlockChecksum (buf, length));
 
    checksum &= 0xff;
 
    return checksum;
#endif
    return 0;
}
 
static byte chktbl[1024] = {
0x84, 0x47, 0x51, 0xc1, 0x93, 0x22, 0x21, 0x24, 0x2f, 0x66, 0x60, 0x4d, 0xb0, 0x7c, 0xda,
0x88, 0x54, 0x15, 0x2b, 0xc6, 0x6c, 0x89, 0xc5, 0x9d, 0x48, 0xee, 0xe6, 0x8a, 0xb5, 0xf4,
0xcb, 0xfb, 0xf1, 0x0c, 0x2e, 0xa0, 0xd7, 0xc9, 0x1f, 0xd6, 0x06, 0x9a, 0x09, 0x41, 0x54,
0x67, 0x46, 0xc7, 0x74, 0xe3, 0xc8, 0xb6, 0x5d, 0xa6, 0x36, 0xc4, 0xab, 0x2c, 0x7e, 0x85,
0xa8, 0xa4, 0xa6, 0x4d, 0x96, 0x19, 0x19, 0x9a, 0xcc, 0xd8, 0xac, 0x39, 0x5e, 0x3c, 0xf2,
0xf5, 0x5a, 0x72, 0xe5, 0xa9, 0xd1, 0xb3, 0x23, 0x82, 0x6f, 0x29, 0xcb, 0xd1, 0xcc, 0x71,
0xfb, 0xea, 0x92, 0xeb, 0x1c, 0xca, 0x4c, 0x70, 0xfe, 0x4d, 0xc9, 0x67, 0x43, 0x47, 0x94,
0xb9, 0x47, 0xbc, 0x3f, 0x01, 0xab, 0x7b, 0xa6, 0xe2, 0x76, 0xef, 0x5a, 0x7a, 0x29, 0x0b,
0x51, 0x54, 0x67, 0xd8, 0x1c, 0x14, 0x3e, 0x29, 0xec, 0xe9, 0x2d, 0x48, 0x67, 0xff, 0xed,
0x54, 0x4f, 0x48, 0xc0, 0xaa, 0x61, 0xf7, 0x78, 0x12, 0x03, 0x7a, 0x9e, 0x8b, 0xcf, 0x83,
0x7b, 0xae, 0xca, 0x7b, 0xd9, 0xe9, 0x53, 0x2a, 0xeb, 0xd2, 0xd8, 0xcd, 0xa3, 0x10, 0x25,
0x78, 0x5a, 0xb5, 0x23, 0x06, 0x93, 0xb7, 0x84, 0xd2, 0xbd, 0x96, 0x75, 0xa5, 0x5e, 0xcf,
0x4e, 0xe9, 0x50, 0xa1, 0xe6, 0x9d, 0xb1, 0xe3, 0x85, 0x66, 0x28, 0x4e, 0x43, 0xdc, 0x6e,
0xbb, 0x33, 0x9e, 0xf3, 0x0d, 0x00, 0xc1, 0xcf, 0x67, 0x34, 0x06, 0x7c, 0x71, 0xe3, 0x63,
0xb7, 0xb7, 0xdf, 0x92, 0xc4, 0xc2, 0x25, 0x5c, 0xff, 0xc3, 0x6e, 0xfc, 0xaa, 0x1e, 0x2a,
0x48, 0x11, 0x1c, 0x36, 0x68, 0x78, 0x86, 0x79, 0x30, 0xc3, 0xd6, 0xde, 0xbc, 0x3a, 0x2a,
0x6d, 0x1e, 0x46, 0xdd, 0xe0, 0x80, 0x1e, 0x44, 0x3b, 0x6f, 0xaf, 0x31, 0xda, 0xa2, 0xbd,
0x77, 0x06, 0x56, 0xc0, 0xb7, 0x92, 0x4b, 0x37, 0xc0, 0xfc, 0xc2, 0xd5, 0xfb, 0xa8, 0xda,
0xf5, 0x57, 0xa8, 0x18, 0xc0, 0xdf, 0xe7, 0xaa, 0x2a, 0xe0, 0x7c, 0x6f, 0x77, 0xb1, 0x26,
0xba, 0xf9, 0x2e, 0x1d, 0x16, 0xcb, 0xb8, 0xa2, 0x44, 0xd5, 0x2f, 0x1a, 0x79, 0x74, 0x87,
0x4b, 0x00, 0xc9, 0x4a, 0x3a, 0x65, 0x8f, 0xe6, 0x5d, 0xe5, 0x0a, 0x77, 0xd8, 0x1a, 0x14,
0x41, 0x75, 0xb1, 0xe2, 0x50, 0x2c, 0x93, 0x38, 0x2b, 0x6d, 0xf3, 0xf6, 0xdb, 0x1f, 0xcd,
0xff, 0x14, 0x70, 0xe7, 0x16, 0xe8, 0x3d, 0xf0, 0xe3, 0xbc, 0x5e, 0xb6, 0x3f, 0xcc, 0x81,
0x24, 0x67, 0xf3, 0x97, 0x3b, 0xfe, 0x3a, 0x96, 0x85, 0xdf, 0xe4, 0x6e, 0x3c, 0x85, 0x05,
0x0e, 0xa3, 0x2b, 0x07, 0xc8, 0xbf, 0xe5, 0x13, 0x82, 0x62, 0x08, 0x61, 0x69, 0x4b, 0x47,
0x62, 0x73, 0x44, 0x64, 0x8e, 0xe2, 0x91, 0xa6, 0x9a, 0xb7, 0xe9, 0x04, 0xb6, 0x54, 0x0c,
0xc5, 0xa9, 0x47, 0xa6, 0xc9, 0x08, 0xfe, 0x4e, 0xa6, 0xcc, 0x8a, 0x5b, 0x90, 0x6f, 0x2b,
0x3f, 0xb6, 0x0a, 0x96, 0xc0, 0x78, 0x58, 0x3c, 0x76, 0x6d, 0x94, 0x1a, 0xe4, 0x4e, 0xb8,
0x38, 0xbb, 0xf5, 0xeb, 0x29, 0xd8, 0xb0, 0xf3, 0x15, 0x1e, 0x99, 0x96, 0x3c, 0x5d, 0x63,
0xd5, 0xb1, 0xad, 0x52, 0xb8, 0x55, 0x70, 0x75, 0x3e, 0x1a, 0xd5, 0xda, 0xf6, 0x7a, 0x48,
0x7d, 0x44, 0x41, 0xf9, 0x11, 0xce, 0xd7, 0xca, 0xa5, 0x3d, 0x7a, 0x79, 0x7e, 0x7d, 0x25,
0x1b, 0x77, 0xbc, 0xf7, 0xc7, 0x0f, 0x84, 0x95, 0x10, 0x92, 0x67, 0x15, 0x11, 0x5a, 0x5e,
0x41, 0x66, 0x0f, 0x38, 0x03, 0xb2, 0xf1, 0x5d, 0xf8, 0xab, 0xc0, 0x02, 0x76, 0x84, 0x28,
0xf4, 0x9d, 0x56, 0x46, 0x60, 0x20, 0xdb, 0x68, 0xa7, 0xbb, 0xee, 0xac, 0x15, 0x01, 0x2f,
0x20, 0x09, 0xdb, 0xc0, 0x16, 0xa1, 0x89, 0xf9, 0x94, 0x59, 0x00, 0xc1, 0x76, 0xbf, 0xc1,
0x4d, 0x5d, 0x2d, 0xa9, 0x85, 0x2c, 0xd6, 0xd3, 0x14, 0xcc, 0x02, 0xc3, 0xc2, 0xfa, 0x6b,
0xb7, 0xa6, 0xef, 0xdd, 0x12, 0x26, 0xa4, 0x63, 0xe3, 0x62, 0xbd, 0x56, 0x8a, 0x52, 0x2b,
0xb9, 0xdf, 0x09, 0xbc, 0x0e, 0x97, 0xa9, 0xb0, 0x82, 0x46, 0x08, 0xd5, 0x1a, 0x8e, 0x1b,
0xa7, 0x90, 0x98, 0xb9, 0xbb, 0x3c, 0x17, 0x9a, 0xf2, 0x82, 0xba, 0x64, 0x0a, 0x7f, 0xca,
0x5a, 0x8c, 0x7c, 0xd3, 0x79, 0x09, 0x5b, 0x26, 0xbb, 0xbd, 0x25, 0xdf, 0x3d, 0x6f, 0x9a,
0x8f, 0xee, 0x21, 0x66, 0xb0, 0x8d, 0x84, 0x4c, 0x91, 0x45, 0xd4, 0x77, 0x4f, 0xb3, 0x8c,
0xbc, 0xa8, 0x99, 0xaa, 0x19, 0x53, 0x7c, 0x02, 0x87, 0xbb, 0x0b, 0x7c, 0x1a, 0x2d, 0xdf,
0x48, 0x44, 0x06, 0xd6, 0x7d, 0x0c, 0x2d, 0x35, 0x76, 0xae, 0xc4, 0x5f, 0x71, 0x85, 0x97,
0xc4, 0x3d, 0xef, 0x52, 0xbe, 0x00, 0xe4, 0xcd, 0x49, 0xd1, 0xd1, 0x1c, 0x3c, 0xd0, 0x1c,
0x42, 0xaf, 0xd4, 0xbd, 0x58, 0x34, 0x07, 0x32, 0xee, 0xb9, 0xb5, 0xea, 0xff, 0xd7, 0x8c,
0x0d, 0x2e, 0x2f, 0xaf, 0x87, 0xbb, 0xe6, 0x52, 0x71, 0x22, 0xf5, 0x25, 0x17, 0xa1, 0x82,
0x04, 0xc2, 0x4a, 0xbd, 0x57, 0xc6, 0xab, 0xc8, 0x35, 0x0c, 0x3c, 0xd9, 0xc2, 0x43, 0xdb,
0x27, 0x92, 0xcf, 0xb8, 0x25, 0x60, 0xfa, 0x21, 0x3b, 0x04, 0x52, 0xc8, 0x96, 0xba, 0x74,
0xe3, 0x67, 0x3e, 0x8e, 0x8d, 0x61, 0x90, 0x92, 0x59, 0xb6, 0x1a, 0x1c, 0x5e, 0x21, 0xc1,
0x65, 0xe5, 0xa6, 0x34, 0x05, 0x6f, 0xc5, 0x60, 0xb1, 0x83, 0xc1, 0xd5, 0xd5, 0xed, 0xd9,
0xc7, 0x11, 0x7b, 0x49, 0x7a, 0xf9, 0xf9, 0x84, 0x47, 0x9b, 0xe2, 0xa5, 0x82, 0xe0, 0xc2,
0x88, 0xd0, 0xb2, 0x58, 0x88, 0x7f, 0x45, 0x09, 0x67, 0x74, 0x61, 0xbf, 0xe6, 0x40, 0xe2,
0x9d, 0xc2, 0x47, 0x05, 0x89, 0xed, 0xcb, 0xbb, 0xb7, 0x27, 0xe7, 0xdc, 0x7a, 0xfd, 0xbf,
0xa8, 0xd0, 0xaa, 0x10, 0x39, 0x3c, 0x20, 0xf0, 0xd3, 0x6e, 0xb1, 0x72, 0xf8, 0xe6, 0x0f,
0xef, 0x37, 0xe5, 0x09, 0x33, 0x5a, 0x83, 0x43, 0x80, 0x4f, 0x65, 0x2f, 0x7c, 0x8c, 0x6a,
0xa0, 0x82, 0x0c, 0xd4, 0xd4, 0xfa, 0x81, 0x60, 0x3d, 0xdf, 0x06, 0xf1, 0x5f, 0x08, 0x0d,
0x6d, 0x43, 0xf2, 0xe3, 0x11, 0x7d, 0x80, 0x32, 0xc5, 0xfb, 0xc5, 0xd9, 0x27, 0xec, 0xc6,
0x4e, 0x65, 0x27, 0x76, 0x87, 0xa6, 0xee, 0xee, 0xd7, 0x8b, 0xd1, 0xa0, 0x5c, 0xb0, 0x42,
0x13, 0x0e, 0x95, 0x4a, 0xf2, 0x06, 0xc6, 0x43, 0x33, 0xf4, 0xc7, 0xf8, 0xe7, 0x1f, 0xdd,
0xe4, 0x46, 0x4a, 0x70, 0x39, 0x6c, 0xd0, 0xed, 0xca, 0xbe, 0x60, 0x3b, 0xd1, 0x7b, 0x57,
0x48, 0xe5, 0x3a, 0x79, 0xc1, 0x69, 0x33, 0x53, 0x1b, 0x80, 0xb8, 0x91, 0x7d, 0xb4, 0xf6,
0x17, 0x1a, 0x1d, 0x5a, 0x32, 0xd6, 0xcc, 0x71, 0x29, 0x3f, 0x28, 0xbb, 0xf3, 0x5e, 0x71,
0xb8, 0x43, 0xaf, 0xf8, 0xb9, 0x64, 0xef, 0xc4, 0xa5, 0x6c, 0x08, 0x53, 0xc7, 0x00, 0x10,
0x39, 0x4f, 0xdd, 0xe4, 0xb6, 0x19, 0x27, 0xfb, 0xb8, 0xf5, 0x32, 0x73, 0xe5, 0xcb, 0x32
};
 
/*
====================
COM_BlockSequenceCRCByte
 
For proxy protecting
====================
*/
byte    COM_BlockSequenceCRCByte (byte *base, int length, int sequence)
{
    int     n;
    byte    *p;
    int     x;
    byte chkb[60 + 4];
    unsigned short crc;
 
 
    if (sequence < 0)
        Sys_Error("sequence < 0, this shouldn't happen\n");
 
    p = chktbl + (sequence % (sizeof(chktbl) - 4));
 
    if (length > 60)
        length = 60;
    memcpy (chkb, base, length);
 
    chkb[length] = p[0];
    chkb[length+1] = p[1];
    chkb[length+2] = p[2];
    chkb[length+3] = p[3];
 
    length += 4;
 
    crc = CRC_Block(chkb, length);
 
    for (x=0, n=0; n<length; n++)
        x += chkb[n];
 
    crc = (crc ^ x) & 0xff;
 
    return crc;
}
 
//========================================================
 
float   frand(void)
{
    return (rand()&32767)* (1.0/32767);
}
 
float   crand(void)
{
    return (rand()&32767)* (2.0/32767) - 1;
}
 
void Key_Init (void);
void SCR_EndLoadingPlaque (void);
 
/*
=============
Com_Error_f
 
Just throw a fatal error to
test error shutdown procedures
=============
*/
void Com_Error_f (void)
{
    Com_Error (ERR_FATAL, "%s", Cmd_Argv(1));
}
 
 
/*
=================
Qcommon_Init
=================
*/
void Qcommon_Init (int argc, char **argv)
{
    char    *s;
 
    if (setjmp (abortframe) )
        Sys_Error ("Error during initialization");
 
    z_chain.next = z_chain.prev = &z_chain;
 
    // prepare enough of the subsystems to handle
    // cvar and command buffer management
    COM_InitArgv (argc, argv);
 
    Swap_Init ();
    Cbuf_Init ();
 
    Cmd_Init ();
    Cvar_Init ();
 
    Key_Init ();
 
    // we need to add the early commands twice, because
    // a basedir or cddir needs to be set before execing
    // config files, but we want other parms to override
    // the settings of the config files
    Cbuf_AddEarlyCommands (false);
    Cbuf_Execute ();
 
    FS_InitFilesystem ();
 
    Cbuf_AddText ("exec default.cfg\n");
    Cbuf_AddText ("exec config.cfg\n");
 
    Cbuf_AddEarlyCommands (true);
    Cbuf_Execute ();
 
    //
    // init commands and vars
    //
    Cmd_AddCommand ("z_stats", Z_Stats_f);
    Cmd_AddCommand ("error", Com_Error_f);
 
    host_speeds = Cvar_Get ("host_speeds", "0", 0);
    log_stats = Cvar_Get ("log_stats", "0", 0);
    developer = Cvar_Get ("developer", "0", 0);
    timescale = Cvar_Get ("timescale", "1", 0);
    fixedtime = Cvar_Get ("fixedtime", "0", 0);
    logfile_active = Cvar_Get ("logfile", "0", 0);
    showtrace = Cvar_Get ("showtrace", "0", 0);
#ifdef DEDICATED_ONLY
    dedicated = Cvar_Get ("dedicated", "1", CVAR_NOSET);
#else
    dedicated = Cvar_Get ("dedicated", "0", CVAR_NOSET);
#endif
 
    s = va("%4.2f %s %s %s", VERSION, CPUSTRING, __DATE__, BUILDSTRING);
    Cvar_Get ("version", s, CVAR_SERVERINFO|CVAR_NOSET);
 
 
    if (dedicated->value)
        Cmd_AddCommand ("quit", Com_Quit);
 
    Sys_Init ();
 
    NET_Init ();
    Netchan_Init ();
 
    SV_Init ();
    CL_Init ();
 
    // add + commands from command line
    if (!Cbuf_AddLateCommands ())
    {   // if the user didn't give any commands, run default action
        if (!dedicated->value)
            Cbuf_AddText ("d1\n");
        else
            Cbuf_AddText ("dedicated_start\n");
        Cbuf_Execute ();
    }
    else
    {   // the user asked for something explicit
        // so drop the loading plaque
        SCR_EndLoadingPlaque ();
    }
 
    Com_Printf ("====== Quake2 Initialized ======\n\n");    
}
 
/*
=================
Qcommon_Frame
=================
*/
void Qcommon_Frame (int msec)
{
    char    *s;
    int     time_before, time_between, time_after;
 
    if (setjmp (abortframe) )
    {
        if (shutdown_game)
            SV_ShutdownGameProgs();
        shutdown_game = false;
        return;         // an ERR_DROP was thrown
    }
 
    if ( log_stats->modified )
    {
        log_stats->modified = false;
        if ( log_stats->value )
        {
            if ( log_stats_file )
            {
                fclose( log_stats_file );
                log_stats_file = 0;
            }
            log_stats_file = fopen( "stats.log", "w" );
            if ( log_stats_file )
                fprintf( log_stats_file, "entities,dlights,parts,frame time\n" );
        }
        else
        {
            if ( log_stats_file )
            {
                fclose( log_stats_file );
                log_stats_file = 0;
            }
        }
    }
 
    if (fixedtime->value)
        msec = fixedtime->value;
    else if (timescale->value)
    {
        msec *= timescale->value;
        if (msec < 1)
            msec = 1;
    }
 
    if (showtrace->value)
    {
        extern  int c_traces, c_brush_traces;
        extern  int c_pointcontents;
 
        Com_Printf ("%4i traces  %4i points\n", c_traces, c_pointcontents);
        c_traces = 0;
        c_brush_traces = 0;
        c_pointcontents = 0;
    }
 
    do
    {
        s = Sys_ConsoleInput ();
        if (s)
            Cbuf_AddText (va("%s\n",s));
    } while (s);
    Cbuf_Execute ();
 
    if (host_speeds->value)
        time_before = Sys_Milliseconds ();
 
    SV_Frame (msec);
 
    if (host_speeds->value)
        time_between = Sys_Milliseconds ();     
 
    CL_Frame (msec);
 
    if (host_speeds->value)
        time_after = Sys_Milliseconds ();       
 
 
    if (host_speeds->value)
    {
        int         all, sv, gm, cl, rf;
 
        all = time_after - time_before;
        sv = time_between - time_before;
        cl = time_after - time_between;
        gm = time_after_game - time_before_game;
        rf = time_after_ref - time_before_ref;
        sv -= gm;
        cl -= rf;
        Com_Printf ("all:%3i sv:%3i gm:%3i cl:%3i rf:%3i\n",
            all, sv, gm, cl, rf);
    }   
}
 
/*
=================
Qcommon_Shutdown
=================
*/
void Qcommon_Shutdown (void)
{
}