/*
 Copyright (C) 1994 M. Hagiya, W. Schelter, T. Yuasa

This file is part of GNU Common Lisp, herein referred to as GCL

GCL is free software; you can redistribute it and/or modify it under
the terms of the GNU LIBRARY GENERAL PUBLIC LICENSE as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GCL 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 Library General Public 
License for more details.

You should have received a copy of the GNU Library General Public License 
along with GCL; see the file COPYING.  If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

*/

/*
	unixsave.c
*/

#define IN_UNIXSAVE
#ifndef FIRSTWORD
#include "include.h"
#endif

#ifdef UNIXSAVE
#include UNIXSAVE
#else

#ifdef HAVE_FCNTL
#include <fcntl.h>
#else
#include <sys/file.h>
#endif

#ifdef HAVE_AOUT
#undef BSD
#undef ATT
#define BSD
#endif



#ifdef BSD
#include HAVE_AOUT
#endif

#ifdef DOS
void 
binary_file_mode()
{_fmode = O_BINARY;}
#endif


#ifdef ATT
#include <filehdr.h>
#include <aouthdr.h>
#include <scnhdr.h>
#endif

#ifdef E15
#include <a.out.h>
extern	char etext;
#endif


filecpy(to, from, n)
FILE *to, *from;
register int n;
{
	char buffer[BUFSIZ];

	for (;;)
		if (n > BUFSIZ) {
			fread(buffer, BUFSIZ, 1, from);
			fwrite(buffer, BUFSIZ, 1, to);
			n -= BUFSIZ;
		} else if (n > 0) {
			fread(buffer, 1, n, from);
			fwrite(buffer, 1, n, to);
			break;
		} else
			break;
}


memory_save(original_file, save_file)
char *original_file, *save_file;
{	MEM_SAVE_LOCALS;
	char *data_begin, *data_end;
	int original_data;
	FILE *original, *save;
	register int n;
	register char *p;
	extern char *sbrk();

	original = freopen(original_file,"r",stdin);
/*	fclose(stdin); 
	original = fopen(original_file, "r");
*/	

	if (stdin != original || original->_file != 0) {
		fprintf(stderr, "Can't open the original file.\n");
		exit(1);
	}
	setbuf(original, stdin_buf);
	fclose(stdout);
	unlink(save_file);
	n = open(save_file, O_CREAT|O_WRONLY, 0777);
	if (n != 1 || (save = fdopen(n, "w")) != stdout) {
		fprintf(stderr, "Can't open the save file.\n");
		exit(1);
	}
	setbuf(save, stdout_buf);

	READ_HEADER;
	FILECPY_HEADER;

	for (n = header.a_data, p = data_begin;  ;  n -= BUFSIZ, p += BUFSIZ)
		if (n > BUFSIZ)
			fwrite(p, BUFSIZ, 1, save);
		else if (n > 0) {
			fwrite(p, 1, n, save);
			break;
		} else
			break;

	fseek(original, original_data, 1);

	COPY_TO_SAVE;

	fclose(original);
	fclose(save);
}

Lsave()
{
	char filename[256];

	check_arg(1);
	check_type_or_pathname_string_symbol_stream(&vs_base[0]);
	coerce_to_filename(vs_base[0], filename);

	_cleanup();
/*
	{
		FILE *p;
		int nfile;


		nfile = NUMBER_OPEN_FILES;

		for (p = &_iob[3];  p < &_iob[nfile];  p++)
			fclose(p);
	}
*/
	memory_save(kcl_self, filename);
/*
	_exit(0);
*/
	exit(0);
	/*  no return  */
}

#endif /* UNIXSAVE include */

init_unixsave()
{
	make_function("SAVE", Lsave);
}

