newtree/source/cl_sys_unix.c

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/*
cl_sys_unix.c
(description)
Copyright (C) 1996-1997 Id Software, Inc.
Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se]
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
$Id$
*/
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <signal.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/mman.h>
#include "sys.h"
#include "qargs.h"
#include "quakedef.h"
int noconinput = 0;
qboolean is_server = false;
#define BASEDIR "."
/* cvar_t sys_linerefresh = {"sys_linerefresh","0"};// set for entity display
CVAR_FIXME */
cvar_t *sys_linerefresh;// set for entity display
// =======================================================================
// General routines
// =======================================================================
/*
void Sys_Printf (char *fmt, ...)
{
va_list argptr;
char text[1024];
va_start (argptr,fmt);
#ifdef HAVE_VSNPRINTF
vsnprintf (text,sizeof(text),fmt,argptr);
#else
vsprintf (text,fmt,argptr);
#endif
va_end (argptr);
fprintf(stderr, "%s", text);
Con_Print (text);
}
void Sys_Printf (char *fmt, ...)
{
va_list argptr;
char text[1024], *t_p;
int l, r;
if (nostdout)
return;
va_start (argptr,fmt);
#ifdef HAVE_VSNPRINTF
vsnprintf (text,sizeof(text),fmt,argptr);
#else
vsprintf (text,fmt,argptr);
#endif
va_end (argptr);
l = strlen(text);
t_p = text;
// make sure everything goes through, even though we are non-blocking
while (l)
{
r = write (1, text, l);
if (r != l)
sleep (0);
if (r > 0)
{
t_p += r;
l -= r;
}
}
}
*/
void Sys_Quit (void)
{
Host_Shutdown();
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~FNDELAY);
exit(0);
}
void Sys_Init(void)
{
sys_nostdout = Cvar_Get("sys_nostdout", "0", CVAR_NONE, "None");
#ifdef USE_INTEL_ASM
Sys_SetFPCW();
#endif
}
void Sys_Error (char *error, ...)
{
va_list argptr;
char string[1024];
// change stdin to non blocking
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~FNDELAY);
va_start (argptr, error);
vsnprintf (string, sizeof(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);
vsnprintf (string, sizeof(string), warning,argptr);
va_end (argptr);
fprintf(stderr, "Warning: %s", string);
}
void Sys_DebugLog(char *file, char *fmt, ...)
{
va_list argptr;
static char data[1024]; // why static ?
int fd;
va_start (argptr, fmt);
vsnprintf (data, sizeof(data), fmt, argptr);
va_end(argptr);
// fd = open(file, O_WRONLY | O_BINARY | O_CREAT | O_APPEND, 0666);
fd = open(file, O_WRONLY | O_CREAT | O_APPEND, 0666);
write(fd, data, strlen(data));
close(fd);
}
void floating_point_exception_handler(int whatever)
{
// Sys_Warn("floating point exception\n");
signal(SIGFPE, floating_point_exception_handler);
}
char *Sys_ConsoleInput(void)
{
#if 0
static char text[256];
int len;
if (cls.state == ca_dedicated) {
len = read (0, text, sizeof(text));
if (len < 1)
return NULL;
text[len-1] = 0; // rip off the /n and terminate
return text;
}
#endif
return NULL;
}
#ifndef USE_INTEL_ASM
void Sys_HighFPPrecision (void)
{
}
void Sys_LowFPPrecision (void)
{
}
#endif
int skipframes;
int main (int c, char **v)
{
double time, oldtime, newtime;
quakeparms_t parms;
int j;
// static char cwd[1024];
// signal(SIGFPE, floating_point_exception_handler);
signal(SIGFPE, SIG_IGN);
memset(&parms, 0, sizeof(parms));
COM_InitArgv(c, v);
parms.argc = com_argc;
parms.argv = com_argv;
parms.memsize = 16*1024*1024;
j = COM_CheckParm("-mem");
if (j)
parms.memsize = (int) (atof(com_argv[j+1]) * 1024 * 1024);
parms.membase = malloc (parms.memsize);
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if (!parms.membase) {
printf("Can't allocate memroy for zone.\n");
return 1;
}
parms.basedir = BASEDIR;
// caching is disabled by default, use -cachedir to enable
// parms.cachedir = cachedir;
noconinput = COM_CheckParm("-noconinput");
if (!noconinput)
fcntl(0, F_SETFL, fcntl (0, F_GETFL, 0) | FNDELAY);
if (COM_CheckParm("-nostdout")) Cvar_Set(sys_nostdout, "1");
Host_Init(&parms);
oldtime = Sys_DoubleTime ();
while (1)
{
// find time spent rendering last frame
newtime = Sys_DoubleTime ();
time = newtime - oldtime;
Host_Frame(time);
oldtime = newtime;
}
}
/*
================
Sys_MakeCodeWriteable
================
*/
void Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length)
{
int r;
unsigned long addr;
int psize = getpagesize();
addr = (startaddr & ~(psize-1)) - psize;
// fprintf(stderr, "writable code %lx(%lx)-%lx, length=%lx\n", startaddr,
// addr, startaddr+length, length);
r = mprotect((char*)addr, length + startaddr - addr + psize, 7);
if (r < 0)
Sys_Error("Protection change failed\n");
}