ref: 91c079724e36fdcf6a8a00262ff12f678ee50a22
dir: /QW/client/sys_linux.c/
/*
Copyright (C) 1996-1997 Id Software, Inc.
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.
*/
#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 <sys/ipc.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <string.h>
#include <ctype.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <errno.h>
#include "quakedef.h"
int noconinput = 0;
int nostdout = 0;
char *basedir = ".";
char *cachedir = "/tmp";
cvar_t sys_linerefresh = {"sys_linerefresh","0"};// set for entity display
// =======================================================================
// General routines
// =======================================================================
void Sys_DebugNumber(int y, int val)
{
}
/*
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);
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);
vsprintf (text,fmt,argptr);
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_Printf (char *fmt, ...)
{
va_list argptr;
char text[2048];
unsigned char *p;
va_start (argptr,fmt);
vsprintf (text,fmt,argptr);
va_end (argptr);
if (strlen(text) > sizeof(text))
Sys_Error("memory overwrite in Sys_Printf");
if (nostdout)
return;
for (p = (unsigned char *)text; *p; p++)
if ((*p > 128 || *p < 32) && *p != 10 && *p != 13 && *p != 9)
printf("[%02x]", *p);
else
putc(*p, stdout);
}
void Sys_Quit (void)
{
Host_Shutdown();
fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~FNDELAY);
exit(0);
}
void Sys_Init(void)
{
#if id386
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);
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);
}
/*
============
Sys_FileTime
returns -1 if not present
============
*/
int Sys_FileTime (char *path)
{
struct stat buf;
if (stat (path,&buf) == -1)
return -1;
return buf.st_mtime;
}
void Sys_mkdir (char *path)
{
mkdir (path, 0777);
}
int Sys_FileOpenRead (char *path, int *handle)
{
int h;
struct stat fileinfo;
h = open (path, O_RDONLY, 0666);
*handle = h;
if (h == -1)
return -1;
if (fstat (h,&fileinfo) == -1)
Sys_Error ("Error fstating %s", path);
return fileinfo.st_size;
}
int Sys_FileOpenWrite (char *path)
{
int handle;
umask (0);
handle = open(path,O_RDWR | O_CREAT | O_TRUNC
, 0666);
if (handle == -1)
Sys_Error ("Error opening %s: %s", path,strerror(errno));
return handle;
}
int Sys_FileWrite (int handle, void *src, int count)
{
return write (handle, src, count);
}
void Sys_FileClose (int handle)
{
close (handle);
}
void Sys_FileSeek (int handle, int position)
{
lseek (handle, position, SEEK_SET);
}
int Sys_FileRead (int handle, void *dest, int count)
{
return read (handle, dest, count);
}
void Sys_DebugLog(char *file, char *fmt, ...)
{
va_list argptr;
static char data[1024];
int fd;
va_start(argptr, fmt);
vsprintf(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 Sys_EditFile(char *filename)
{
char cmd[256];
char *term;
char *editor;
term = getenv("TERM");
if (term && !strcmp(term, "xterm"))
{
editor = getenv("VISUAL");
if (!editor)
editor = getenv("EDITOR");
if (!editor)
editor = getenv("EDIT");
if (!editor)
editor = "vi";
sprintf(cmd, "xterm -e %s %s", editor, filename);
system(cmd);
}
}
double Sys_DoubleTime (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
// =======================================================================
static volatile int oktogo;
void alarm_handler(int x)
{
oktogo=1;
}
void Sys_LineRefresh(void)
{
}
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;
}
#if !id386
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) (Q_atof(com_argv[j+1]) * 1024 * 1024);
parms.membase = malloc (parms.memsize);
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"))
nostdout = 1;
Sys_Init();
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");
}