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/*

 * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. Neither the name of The TenDRA Project nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific, prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS

 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * $Id$

 */

/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/************************************************************************/

/*									*/

/*		gen_tokens.c	Version 2.0				*/

/*									*/

/*  This program produces some of the target dependency tokens		*/

/*  in 'PL TDF' or 'tnc' format for the target system it is		*/

/*  compiled and run on.						*/

/*									*/

/*  Results are not guaranteed - they should be checked.		*/

/*									*/

/*  Each token value may be pre-set by externally defining a macro	*/

/*  with the appropriate local name and value.				*/

/*									*/

/*  Output format is PL TDF by default, 'tnc' if the macro TNC_SRC	*/

/*  is defined.								*/

/*									*/

/************************************************************************/

#include <stdio.h>

#include <stddef.h>

#include <limits.h>

/* Defined in '../../../../utilities/shared' */

static void

out_nat(char *name, int value)

{

#ifdef TNC_SRC

	(void)printf("( make_tokdef .~%s nat %d )\n\n", name, value);

#else	/* PL TDF source */

	(void)printf("Tokdef .~%s = [] NAT %d;\n\n", name, value);

#endif

	return;

}

static void

out_bool(char *name, int value)

{

	char *str = (value ? "true" : "false");

#ifdef TNC_SRC

	(void)printf("( make_tokdef .~%s bool %s )\n\n", name, str);

#else	/* PL TDF source */

	(void)printf("Tokdef .~%s = [] BOOL %s;\n\n", name, str);

#endif

	return;

}

static int

calc_width(unsigned long s_max)

{

	int i;

	for (i=1;;i++) {

		if ((((unsigned long)1) <<i) > s_max) return i+1;

	}

	/* UNREACHED */

}

#define width(c)	calc_width((unsigned long)(c))

int

main(void)

{

	int c_width, s_width, i_width, l_width, sz_width;

	int p_width, al_width, str_ch_width;

	int c_sgn, bf_sgn, bdiv, l_end;

#ifdef char_width

	c_width = char_width;

#else

	c_width = width(SCHAR_MAX);

#endif

	out_nat("char_width", c_width);

#ifdef short_width

	s_width = short_width;

#else

	s_width = width(SHRT_MAX);

#endif

	out_nat("short_width", s_width);

#ifdef int_width

	i_width = int_width;

#else

	i_width = width(INT_MAX);

#endif

	out_nat("int_width", i_width);

#ifdef long_width

	l_width = long_width;

#else

	l_width = width(LONG_MAX);

#endif

	out_nat("long_width", l_width);

#ifdef size_t_width

	sz_width = size_t_width;

#else

	sz_width = sizeof(size_t)* c_width;

#endif

	out_nat("size_t_width", sz_width);

#ifdef ptr_width

	p_width = ptr_width;

#else

	p_width = sizeof(char*)* c_width;

#endif

	out_nat("ptr_width", p_width);

#ifdef min_struct_rep

	al_width = min_struct_rep;

	str_ch_width = min_struct_rep;

#else

	{

		struct t { char c; struct { char c; } s; };

		struct c { char c; };

		al_width = offsetof(struct t,s)* c_width;

		str_ch_width = sizeof(struct c)* c_width;

	}

#endif

	if (al_width == str_ch_width) {

		out_nat("min_struct_rep", al_width);

	}

#ifdef char_is_signed

	c_sgn = char_is_signed;

#else

	c_sgn = (CHAR_MIN<0)? 1 : 0;

#endif

	out_nat("char_is_signed", c_sgn);

#ifdef bitfield_is_signed

	bf_sgn = bitfield_is_signed;

#else

	{

		struct { int ibits : 2; } s;

		s.ibits = -1;

		bf_sgn = (s.ibits<0)? 1 : 0;

	}

#endif

	out_nat("bitfield_is_signed", bf_sgn);

#ifdef best_div

	bdiv = best_div;

#else

	bdiv = (4%(-6) >0) +1;

#endif

	out_nat("best_div", bdiv);

#ifdef little_endian

	l_end = little_endian;

#else

	{

		unsigned u;

		u = ('a' << 24) | ('b' << 16) | ('c' << 8) | ('d' << 0);

		l_end = -1;

		if (sizeof(u) ==4 && *(char *) &u == 'd')l_end = 1;

		if (sizeof(u) ==4 && *(char *) &u == 'a')l_end = 0;

	}

#endif

	if (l_end >= 0 && l_end <= 1) {

		out_bool("little_endian", l_end);

	}

	return 0;

}