i_system.c

The source code of Doom legacy for windows

// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id: i_system.c,v 1.15 2001/03/12 21:03:10 metzgermeister Exp $
//
// Copyright (C) 1993-1996 by id Software, Inc.
// Portions Copyright (C) 1998-2000 by DooM Legacy Team.
//
// 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.
//
//
// $Log: i_system.c,v $
// Revision 1.15  2001/03/12 21:03:10  metzgermeister
//   * new symbols for rendererlib added in SDL
//   * console printout fixed for Linux&SDL
//   * Crash fixed in Linux SW renderer initialization
//
// Revision 1.14  2000/10/21 08:43:32  bpereira
// no message
//
// Revision 1.13  2000/10/16 07:53:57  metzgermeister
// fixed I_GetFreeMem
//
// Revision 1.12  2000/10/09 16:22:42  metzgermeister
// implemented GetFreeMem
//
// Revision 1.11  2000/10/02 18:25:47  bpereira
// no message
//
// Revision 1.10  2000/09/10 10:50:21  metzgermeister
// make it work again
//
// Revision 1.9  2000/08/11 19:11:07  metzgermeister
// *** empty log message ***
//
// Revision 1.8  2000/04/25 19:49:46  metzgermeister
// support for automatic wad search
//
// Revision 1.7  2000/04/16 18:38:07  bpereira
// no message
//
// Revision 1.6  2000/04/12 19:31:37  metzgermeister
// added use_mouse to menu
//
// Revision 1.5  2000/04/07 23:12:38  metzgermeister
// fixed some minor bugs
//
// Revision 1.4  2000/03/22 18:52:56  metzgermeister
// added I_ShutdownCD to I_Quit
//
// Revision 1.3  2000/03/06 15:19:58  hurdler
// Add Bell Kin's changes
//
// Revision 1.2  2000/02/27 00:42:11  hurdler
// fix CR+LF problem
//
// Revision 1.1.1.1  2000/02/22 20:32:33  hurdler
// Initial import into CVS (v1.29 pr3)
//
//
// DESCRIPTION:
//
//-----------------------------------------------------------------------------


#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <string.h>

#include <stdarg.h>
#include <sys/time.h>
#ifdef LMOUSE2
#include <termios.h>
#endif
// statfs()
#include <sys/vfs.h>

#ifdef LJOYSTICK // linux joystick 1.x
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <linux/joystick.h>
#endif

#include "doomdef.h"
#include "m_misc.h"
#include "i_video.h"
#include "i_sound.h"

#include "d_net.h"
#include "g_game.h"

#include "endtxt.h"

#ifdef __GNUG__
#pragma implementation "i_system.h"
#endif
#include "i_system.h"
#include "i_joy.h"

extern void D_PostEvent(event_t*);

extern event_t         events[MAXEVENTS];
extern int             eventhead;
extern int             eventtail;

// Locations for searching the doom3.wad
#define DEFAULTWADLOCATION1 "/usr/local/games/legacy"
#define DEFAULTWADLOCATION2 "/usr/games/legacy"
#define DEFAULTSEARCHPATH1 "/usr/local"
#define DEFAULTSEARCHPATH2 "/usr/games"
#define WADKEYWORD "doom3.wad"

// holds wad path
static char returnWadPath[256];

#ifdef LJOYSTICK
int joyfd = -1;
int joyaxes = 0;
int joystick_started = 0;
int joy_scale = 1;
#endif
JoyType_t Joystick;

#ifdef LMOUSE2
int fdmouse2 = -1;
int mouse2_started = 0;
#endif

// dummy 19990119 by Kin
byte keyboard_started = 0;
void I_StartupKeyboard (void) {}
void I_StartupTimer (void) {}

void I_OutputMsg (char *fmt, ...) 
{
    va_list     argptr;

    va_start (argptr,fmt);
    vfprintf (stderr,fmt,argptr);
    va_end (argptr);
}

int I_GetKey (void) 
{
    // Warning: I_GetKey emties the event queue till next keypress
    event_t*    ev;
    int rc=0;
    
    // return the first keypress from the event queue
    for ( ; eventtail != eventhead ; eventtail = (++eventtail)&(MAXEVENTS-1) )
    {
        ev = &events[eventtail];
        if(ev->type == ev_keydown)
        {
            rc = ev->data1;
            continue;
        }
    }
    
    return rc; 
}

#ifdef LJOYSTICK
void I_JoyScale() {
  joy_scale = (cv_joyscale.value==0)?1:cv_joyscale.value;
}

void I_GetJoyEvent() {
  struct js_event jdata;
  static event_t event = {0,0,0,0};
  static int buttons = 0;
  if(!joystick_started) return;
  while(read(joyfd,&jdata,sizeof(jdata))!=-1) {
    switch(jdata.type) {
    case JS_EVENT_AXIS:
      event.type = ev_joystick;
      event.data1 = 0;
      switch(jdata.number) {
      case 0:
        event.data2 = ((jdata.value >> 5)/joy_scale)*joy_scale;
        D_PostEvent(&event);
        break;
      case 1:
        event.data3 = ((jdata.value >> 5)/joy_scale)*joy_scale;
        D_PostEvent(&event);
      default:
        break;
      }
      break;
    case JS_EVENT_BUTTON:
      if(jdata.number<JOYBUTTONS) {
        if(jdata.value) {
          if(!((buttons >> jdata.number)&1)) {
            buttons |= 1 << jdata.number;
            event.type = ev_keydown;
            event.data1 = KEY_JOY1+jdata.number;
            D_PostEvent(&event);
          }
        } else {
          if((buttons>>jdata.number)&1) {
            buttons ^= 1 << jdata.number;
            event.type = ev_keyup;
            event.data1 = KEY_JOY1+jdata.number;
            D_PostEvent(&event);
          }
        }
      }
      break;
    }
  }
}

void I_ShutdownJoystick() {
  if(joyfd!=-1) {
    close(joyfd);
    joyfd = -1;
  }
  joyaxes = 0;
  joystick_started = 0;
}

int joy_open(char *fname) {
  joyfd = open(fname,O_RDONLY|O_NONBLOCK);
  if(joyfd==-1) {
    CONS_Printf("Error opening %s!\n",fname);
    return 0;
  }
  ioctl(joyfd,JSIOCGAXES,&joyaxes);
  if(joyaxes<2) {
    CONS_Printf("Not enought axes?\n");
    joyaxes = 0;
    joyfd = -1;
    close(joyfd);
    return 0;
  }
  return joyaxes;
}
/*int joy_waitb(int fd, int *xpos,int *ypos,int *hxpos,int *hypos) {
  int i,xps,yps,hxps,hyps;
  struct js_event jdata;
  for(i=0;i<1000;i++) {
    while(read(fd,&jdata,sizeof(jdata))!=-1) {
      switch(jdata.type) {
      case JS_EVENT_AXIS:
        switch(jdata.number) {
        case 0: // x
          xps = jdata.value;
          break;
        case 1: // y
          yps = jdata.value;
          break;
        case 3: // hat x
          hxps = jdata.value;
          break;
        case 4: // hat y
          hyps = jdata.value;
        default:
          break;
        }
        break;
      case JS_EVENT_BUTTON:
        break;
      }
    }
  }
  }*/
#endif

void I_InitJoystick (void) {
#ifdef LJOYSTICK
  I_ShutdownJoystick();
  if(!strcmp(cv_usejoystick.string,"0"))
    return;
  if(!joy_open(cv_joyport.string)) return;
  joystick_started = 1;
  return;
#endif
}

#ifdef LMOUSE2
void I_GetMouse2Event() {
  static unsigned char mdata[5];
  static int i = 0,om2b = 0;
  int di,j,mlp,button;
  event_t event;
  const int mswap[8] = {0,4,1,5,2,6,3,7};
  if(!mouse2_started) return;
  for(mlp=0;mlp<20;mlp++) {
    for(;i<5;i++) {
      di = read(fdmouse2,mdata+i,1);
      if(di==-1) return;
    }
    if((mdata[0]&0xf8)!=0x80) {
      for(j=1;j<5;j++) {
        if((mdata[j]&0xf8)==0x80) {
          for(i=0;i<5-j;i++) { // shift
            mdata[i] = mdata[i+j];
          }
        }
      }
      if(i<5) continue;
    } else {
      button = mswap[~mdata[0]&0x07];
      for(j=0;j<MOUSEBUTTONS;j++) {
        if(om2b&(1<<j)) {
          if(!(button&(1<<j))) { //keyup
            event.type = ev_keyup;
            event.data1 = KEY_2MOUSE1+j;
            D_PostEvent(&event);
            om2b ^= 1 << j;
          }
        } else {
          if(button&(1<<j)) {
            event.type = ev_keydown;
            event.data1 = KEY_2MOUSE1+j;
            D_PostEvent(&event);
            om2b ^= 1 << j;
          }
        }
      }
      event.data2 = ((signed char)mdata[1])+((signed char)mdata[3]);
      event.data3 = ((signed char)mdata[2])+((signed char)mdata[4]);
      if(event.data2&&event.data3) {
        event.type = ev_mouse2;
        event.data1 = 0;
        D_PostEvent(&event);
      }
    }
    i = 0;
  }
}

void I_ShutdownMouse2() {
  if(fdmouse2!=-1) close(fdmouse2);
  mouse2_started = 0;
}

#endif

void I_StartupMouse2 (void) {
#ifdef LMOUSE2
  struct termios m2tio;
  int i,dtr,rts;
  I_ShutdownMouse2();
  if(cv_usemouse2.value == 0) return;
  if((fdmouse2 = open(cv_mouse2port.string,O_RDONLY|O_NONBLOCK|O_NOCTTY))==-1) {
    CONS_Printf("Error opening %s!\n",cv_mouse2port.string);
    return;
  }
  tcflush(fdmouse2, TCIOFLUSH);
  m2tio.c_iflag = IGNBRK;
  m2tio.c_oflag = 0;
  m2tio.c_cflag = CREAD|CLOCAL|HUPCL|CS8|CSTOPB|B1200;
  m2tio.c_lflag = 0;
  m2tio.c_cc[VTIME] = 0;
  m2tio.c_cc[VMIN] = 1;
  tcsetattr(fdmouse2, TCSANOW, &m2tio);
  strupr(cv_mouse2opt.string);
  for(i=0,rts = dtr = -1;i<strlen(cv_mouse2opt.string);i++) {
    if(cv_mouse2opt.string[i]=='D') {
      if(cv_mouse2opt.string[i+1]=='-') {
        dtr = 0;
      } else {
        dtr = 1;
      }
    }
    if(cv_mouse2opt.string[i]=='R') {
      if(cv_mouse2opt.string[i+1]=='-') {
        rts = 0;
      } else {
        rts = 1;
      }
    }
  }
  if((dtr!=-1)||(rts!=-1)) {
    if(!ioctl(fdmouse2, TIOCMGET, &i)) {
      if(!dtr) {
        i &= ~TIOCM_DTR;
      } else {
        if(dtr>0) i |= TIOCM_DTR;
      }
      if(!rts) {
        i &= ~TIOCM_RTS;
      } else {
        if(rts>0) i |= TIOCM_RTS;
      }
      ioctl(fdmouse2, TIOCMSET, &i);
    }
  }
  mouse2_started = 1;
#endif
}

// return free and total physical memory in the system

#define MEMINFO_FILE "/proc/meminfo"
#define MEMTOTAL "MemTotal:"
#define MEMFREE "MemFree:"

ULONG I_GetFreeMem(ULONG *total)
{
    char buf[1024];    
    char *memTag;
    ULONG freeKBytes;
    ULONG totalKBytes;
    int n;