i_system.c

doom游戏

// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
//
//-----------------------------------------------------------------------------

static const char
rcsid[] = "$Id: m_bbox.c,v 1.1 1997/02/03 22:45:10 b1 Exp $";


#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include "SDL.h"
#include "SDL_timer.h"

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

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

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




int	mb_used = /*!!6*/ 1;


int I_strncasecmp(char *str1, char *str2, int len)
{
	char c1, c2;

	while ( *str1 && *str2 && len-- ) {
		c1 = *str1++;
		c2 = *str2++;
		if ( toupper(c1) != toupper(c2) )
			return(1);
	}
	return(0);
}

void
I_Tactile
( int	on,
  int	off,
  int	total )
{
  // UNUSED.
  on = off = total = 0;
}

ticcmd_t	emptycmd;
ticcmd_t*	I_BaseTiccmd(void)
{
    return &emptycmd;
}


int  I_GetHeapSize (void)
{
    return mb_used*1024*1024;
}

byte* I_ZoneBase (int*	size)
{
    *size = mb_used*1024*1024;
    return (byte *) malloc (*size);
}



//
// I_GetTime
// returns time in 1/35 second tics
//
int  I_GetTime (void)
{
    return (SDL_GetTicks()*TICRATE)/1000;
}



//
// I_Init
//
void I_Init (void)
{
    if ( SDL_Init(/*!!SDL_INIT_AUDIO|*/SDL_INIT_VIDEO) < 0 )
        I_Error("Could not initialize SDL: %s", SDL_GetError());

    I_InitSound();
    //  I_InitGraphics();
}

//
// I_Quit
//
void I_Quit (void)
{
    D_QuitNetGame ();
    I_ShutdownSound();
    I_ShutdownMusic();
    M_SaveDefaults ();
    I_ShutdownGraphics();
    exit(0);
}

void I_WaitVBL(int count)
{
    SDL_Delay((count*1000)/70);
}

void I_BeginRead(void)
{
}

void I_EndRead(void)
{
}

byte*	I_AllocLow(int length)
{
    byte*	mem;
        
    mem = (byte *)malloc (length);
    memset (mem,0,length);
    return mem;
}


//
// I_Error
//
extern boolean demorecording;

void I_Error (char *error, ...)
{
    va_list	argptr;
    char out_str[256]; //!!
    char out_str2[256]; //!!

    // Message first.
    va_start (argptr,error);

    sprintf (out_str, "Error: "); //!!
    //!!fprintf (stderr, "Error: "); 
    vsprintf (out_str2,error,argptr); //!!
    strcat(out_str, out_str2);
    //!!vfprintf (stderr,error,argptr); 
    //!!fprintf (stderr, "\n");
    va_end (argptr);

    SDL_TRACE(out_str); //!!
    //!!fflush( stderr );

    // Shutdown. Here might be other errors.
    if (demorecording)
	G_CheckDemoStatus();

    D_QuitNetGame ();
    I_ShutdownGraphics();
    
    exit(-1);
}

//!! my debug print
int debug_printf (const char *fmt, ...)
{
  int ret;
  va_list	argptr;
  char out_str[512]; 

  // Message first.
  va_start (argptr,fmt);
  ret = vsprintf (out_str,fmt,argptr); 
  va_end (argptr);
  if (strlen(out_str) > 128)
      out_str[128] = 0; // max length 128
  SDL_TRACE(out_str); 
  SDL_MEM();
  return ret;
}