/*
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;
}

/*
================
Sys_filelength
================
*/
int
Sys_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 Sys_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_DebugLog(char *file, char *fmt, ...)
{
}

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_DoubleTime(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)
{
    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);
    }
}