#include <unistd.h>#include <signal.h>#include <stdlib.h>#include <limits.h>#include <sys/time.h>#include <sys/types.h>#include <unistd.h>#include <fcntl.h>#include <stdarg.h>#include <stdio.h>#include <string.h>#include <ctype.h>#include <errno.h>#include <sys/ipc.h>#include <sys/shm.h>#include <sys/stat.h>#include <sys/wait.h>#include <sys/mman.h>#include <execinfo.h> #include "quakedef.h" int noconinput = 0; char *basedir = ".";char *cachedir = "/tmp"; // =======================================================================// General routines// ======================================================================= void Sys_Printf (char *fmt, ...){	va_list argptr;	char text[1024]; 	va_start (argptr,fmt);	vsprintf (text,fmt,argptr);	va_end (argptr);	fprintf(stderr, "%s", text);} void Sys_Quit (void){	Host_Shutdown();	exit(0);} void Sys_Init(void){} void Sys_Error (char *error, ...){	va_list argptr;	char string[1024];	void *buf[32];	int levels; 	levels = backtrace(buf, nelem(buf));	backtrace_symbols_fd(&buf[1], levels-1, 2); 	va_start (argptr,error);	vsprintf (string,error,argptr);	va_end (argptr);	fprintf(stderr, "Error: %s\n", string); 	Host_Shutdown ();	exit (1); } void Sys_Warn (char *warning, ...){	va_list argptr;	char string[1024]; 	va_start (argptr,warning);	vsprintf (string,warning,argptr);	va_end (argptr);	fprintf(stderr, "Warning: %s", string);} /*=============================================================================== FILE IO ===============================================================================*/ #define MAX_HANDLES 10FILE *sys_handles[MAX_HANDLES]; int findhandle (void){	int i; 	for (i=1 ; i<MAX_HANDLES ; i++)		if (!sys_handles[i])			return i;	Sys_Error ("out of handles");	return -1;} /*================Qfilelength================*/static int Qfilelength (FILE *f){	int pos;	int end; 	pos = ftell (f);	fseek (f, 0, SEEK_END);	end = ftell (f);	fseek (f, pos, SEEK_SET); 	return end;} int Sys_FileOpenRead (char *path, int *hndl){	FILE *f;	int i; 	i = findhandle (); 	f = fopen(path, "rb");	if (!f)	{		*hndl = -1;		return -1;	}	sys_handles[i] = f;	*hndl = i; 	return Qfilelength(f);} int Sys_FileOpenWrite (char *path){	FILE *f;	int i; 	i = findhandle (); 	f = fopen(path, "wb");	if (!f)		Sys_Error ("Error opening %s: %s", path,strerror(errno));	sys_handles[i] = f; 	return i;} void Sys_FileClose (int handle){	if ( handle >= 0 ) {		fclose (sys_handles[handle]);		sys_handles[handle] = NULL;	}} void Sys_FileSeek (int handle, int position){	if ( handle >= 0 ) {		fseek (sys_handles[handle], position, SEEK_SET);	}} int Sys_FileRead (int handle, void *dst, int count){	char *data;	int size, done; 	size = 0;	if ( handle >= 0 ) {		data = dst;		while ( count > 0 ) {			done = fread (data, 1, count, sys_handles[handle]);			if ( done == 0 ) {				break;			}			data += done;			count -= done;			size += done;		}	}	return size; } int Sys_FileWrite (int handle, void *src, int count){	char *data;	int size, done; 	size = 0;	if ( handle >= 0 ) {		data = src;		while ( count > 0 ) {			done = fread (data, 1, count, sys_handles[handle]);			if ( done == 0 ) {				break;			}			data += done;			count -= done;			size += done;		}	}	return size;} int Sys_FileTime (char *path){	FILE *f; 	f = fopen(path, "rb");	if (f)	{		fclose(f);		return 1;	} 	return -1;} void Sys_mkdir (char *path){	mkdir (path, 0777);} void Sys_DebugLog(char *file, char *fmt, ...){	va_list argptr;	static char data[1024];	FILE *fp; 	va_start(argptr, fmt);	vsprintf(data, fmt, argptr);	va_end(argptr);	fp = fopen(file, "a");	fwrite(data, strlen(data), 1, fp);	fclose(fp);} double Sys_FloatTime (void){	struct timeval tp;	struct timezone tzp;	static int secbase; 	gettimeofday(&tp, &tzp); 	if (!secbase)	{		secbase = tp.tv_sec;		return tp.tv_usec/1000000.0;	} 	return (tp.tv_sec - secbase) + tp.tv_usec/1000000.0;} // =======================================================================// Sleeps for microseconds// ======================================================================= int main (int c, char **v){ 	double time, oldtime, newtime;	quakeparms_t parms;	extern int vcrFile;	extern int recording; 	signal(SIGFPE, SIG_IGN); 	memset(&parms, 0, sizeof(parms));	parms.memsize = 128*1024*1024;	parms.membase = malloc (parms.memsize);	parms.basedir = basedir;	parms.cachedir = cachedir; 	COM_InitArgv(c, v);	parms.argc = com_argc;	parms.argv = com_argv; 	Sys_Init();	Host_Init(&parms); 	oldtime = Sys_FloatTime () - 0.1;	while (1)	{// find time spent rendering last frame		newtime = Sys_FloatTime ();		time = newtime - oldtime; 		if (cls.state == ca_dedicated)		{ // play vcrfiles at max speed			if (time < sys_ticrate.value && (vcrFile == -1 || recording) )			{				SDL_Delay (1);				continue; // not time to run a server only tic yet			}			time = sys_ticrate.value;		} 		if (time > sys_ticrate.value*2)			oldtime = newtime;		else			oldtime += time; 		Host_Frame (time);	}}