/* djgpp2.c -- LZO packer

   This file is part of the LZO real-time data compression package.

   Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
   Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer

   The LZO library and packer 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; see the file COPYING.
   If not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

   Markus F.X.J. Oberhumer
   markus.oberhumer@jk.uni-linz.ac.at
 */


#include "lzopack.h"

#if defined(__DJGPP__)

#include <dpmi.h>
#include <go32.h>


/*************************************************************************
// init
**************************************************************************/

/* Minimum stack */
unsigned _stklen = 65536;


/* This is called before `main'. */
static void __attribute__((constructor))
djgpp_startup (void)
{
	const char *s;

	s = getenv("LZOP_LFN");
	if (s == NULL || (s[0] != 'n' && s[0] != 'N'))
		putenv("LFN=y");
	else
	{
		putenv("LFN=n");
  		_crt0_startup_flags |= _CRT0_FLAG_NO_LFN;
	}

	_djstat_flags |= _STAT_INODE;
	_djstat_flags |= _STAT_EXEC_EXT;
	_djstat_flags |= _STAT_EXEC_MAGIC;
	_djstat_flags |= _STAT_DIRSIZE;
	_djstat_flags |= _STAT_ROOT_TIME;
}


/* No need for loading the environment. */
void __crt0_load_environment_file(char *app_name) { UNUSED(app_name); }


/* No need for this function */
int _is_executable(const char *filename, int fhandle, const char *extension)
{
	UNUSED(filename);
	UNUSED(fhandle);
	UNUSED(extension);
	return 0;
}


/*************************************************************************
// info
**************************************************************************/

#if 0

typedef struct {
  unsigned long largest_available_free_block_in_bytes;
  unsigned long maximum_unlocked_page_allocation_in_pages;
  unsigned long maximum_locked_page_allocation_in_pages;
  unsigned long linear_address_space_size_in_pages;
  unsigned long total_number_of_unlocked_pages;
  unsigned long total_number_of_free_pages;
  unsigned long total_number_of_physical_pages;
  unsigned long free_linear_address_space_in_pages;
  unsigned long size_of_paging_file_partition_in_pages;
  unsigned long reserved[3];
} __dpmi_free_mem_info;

typedef struct {
  unsigned long available_memory;
  unsigned long available_pages;
  unsigned long available_lockable_pages;
  unsigned long linear_space;
  unsigned long unlocked_pages;
  unsigned long available_physical_pages;
  unsigned long total_physical_pages;
  unsigned long free_linear_space;
  unsigned long max_pages_in_paging_file;
  unsigned long reserved[3];
} _go32_dpmi_meminfo;

#endif

static void meminfo(void)
{
	__dpmi_free_mem_info info;
	const unsigned long err = (unsigned long) -1;
	unsigned long ps = 0;
	unsigned long k;

	if (__dpmi_get_page_size(&ps) != 0 || ps <= 0)
		return;
	if (__dpmi_get_free_memory_information(&info) != 0)
		return;

#if 0
	k = info.largest_available_free_block_in_bytes;
	if (k == err)
	{
        k = info.maximum_unlocked_page_allocation_in_pages;
        if (k != err)
            k *= ps;
        else
            k = info.largest_available_free_block_in_bytes;
        k = err;
	}
	phys = k;
#endif

	k = info.total_number_of_physical_pages;
	k = info.total_number_of_unlocked_pages;
	k = info.total_number_of_free_pages;
	k = (k == err) ? err : k * ps;
	if (k != err)
	{
		k /= 1024;
		con_fprintf(con_term,"DPMI physical memory available: %6ld kB\n",k);
	}

	k = info.maximum_unlocked_page_allocation_in_pages;
	k = (k == err) ? err : k * ps;
	if (k != err)
	{
		k /= 1024;
		con_fprintf(con_term,"DPMI virtual memory available:  %6ld kB\n",k);
	}
	con_fprintf(con_term,"\n");
}


void sysinfo_djgpp(void)
{
	meminfo();

	if (_USE_LFN)
		con_fprintf(con_term,"Long filenames are supported.\n");
	else
		con_fprintf(con_term,"Long filenames are not supported.\n");
	con_fprintf(con_term,"\n");
}



#endif /* __DJGPP__ */


/*
vi:ts=4
*/