/*
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.

*/
// sys_null.h -- null system driver to aid porting efforts

#include "quakedef.h"
#include "errno.h"

/*
===============================================================================

FILE IO

===============================================================================
*/

#define MAX_HANDLES             10
FILE    *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;
}

/*
================
filelength
================
*/
int filelength (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 filelength(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)
{
  fclose (sys_handles[handle]);
  sys_handles[handle] = NULL;
}

void Sys_FileSeek (int handle, int position)
{
  fseek (sys_handles[handle], position, SEEK_SET);
}

int Sys_FileRead (int handle, void *dest, int count)
{
  return fread (dest, 1, count, sys_handles[handle]);
}

int Sys_FileWrite (int handle, void *data, int count)
{
  return fwrite (data, 1, count, sys_handles[handle]);
}

int     Sys_FileTime (char *path)
{
  FILE    *f;
  
  f = fopen(path, "rb");
  if (f)
  {
    fclose(f);
    return 1;
  }
  
  return -1;
}

void Sys_mkdir (char *path)
{
}


/*
===============================================================================

SYSTEM IO

===============================================================================
*/

void Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length)
{
}


void Sys_Error (char *error, ...)
{
  va_list         argptr;

  printf ("Sys_Error: ");   
  va_start (argptr,error);
  vprintf (error,argptr);
  va_end (argptr);
  printf ("\n");

  exit (1);
}

void Sys_Printf (char *fmt, ...)
{
  va_list         argptr;
  
  va_start (argptr,fmt);
  vprintf (fmt,argptr);
  va_end (argptr);
}

void Sys_Quit (void)
{
  exit (0);
}

double Sys_FloatTime (void)
{
  static double t;
  
  t += 0.1;
  
  return t;
}

char *Sys_ConsoleInput (void)
{
  return NULL;
}

void Sys_Sleep (void)
{
}

void Sys_SendKeyEvents (void)
{
}

void Sys_HighFPPrecision (void)
{
}

void Sys_LowFPPrecision (void)
{
}

//=============================================================================

void main (int argc, char **argv)
{
  static quakeparms_t    parms;

  parms.memsize = 8*1024*1024;
  parms.membase = malloc (parms.memsize);
  parms.basedir = ".";

  COM_InitArgv (argc, argv);

  parms.argc = com_argc;
  parms.argv = com_argv;

  printf ("Host_Init\n");
  Host_Init (&parms);
  while (1)
  {
    Host_Frame (0.1);
  }
}