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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.
*/
#ifndef CONSTANT_INCLUDED
#define CONSTANT_INCLUDED
/*
CONSTANT EVALUATION MACROS
All the calculation routines are based on lists of unsigned int's
holding values in the range [0, 0xffff]. The type unsigned long is
guaranteed to contain at least the range [0, 0xffffffff]. All
calculations are performed in this double precision type to allow for
overflows. The macros LO_HALF, HI_HALF, EXTEND_VALUE and COMBINE_VALUES
are used for converting to and from the extended type.
*/
#define NAT_DIGITS 16
#define NAT_MASK ((unsigned)0xffff)
#define LO_HALF(A) ((unsigned)((A) & NAT_MASK))
#define HI_HALF(A) (LO_HALF((A) >> NAT_DIGITS))
#define EXTEND_VALUE(A) ((unsigned long)(A))
#define COMBINE_VALUES(A, B) (EXTEND_VALUE(A) +\
(EXTEND_VALUE(B) << NAT_DIGITS))
#define EXTENDED_MAX COMBINE_VALUES(NAT_MASK, NAT_MASK)
/*
CONSTANT EVALUATION DECLARATIONS
The routines in this module are concerned with constructing and
performing calculations with integer constant expressions.
*/
extern void init_constant(void);
extern void init_float(FLOAT_TYPE);
extern FLOAT get_float(TYPE, int);
extern NAT make_nat_literal(NAT, unsigned, unsigned);
extern NAT make_large_nat(LIST(unsigned));
extern NAT make_nat_value(unsigned long);
extern NAT make_small_nat(int);
extern unsigned long get_nat_value(NAT);
extern NAT negate_nat(NAT);
extern NAT binary_nat_op(unsigned, NAT, NAT);
extern int compare_nat(NAT, NAT);
extern int eq_nat(NAT, NAT);
extern int check_nat_range(TYPE, NAT);
extern int check_type_size(TYPE, NAT);
extern NAT max_type_value(TYPE, int);
extern void check_bounds(int, TYPE, EXP);
extern unsigned eval_const_cond(EXP);
extern unsigned no_bits(unsigned);
extern int divides_nat(EXP, EXP);
extern int is_zero_nat(NAT);
extern int is_negative_nat(NAT);
extern int is_error_nat(NAT);
extern int is_calc_nat(NAT);
extern int is_zero_exp(EXP);
extern int is_literal(EXP);
/*
CONSTANT EVALUATION ROUTINES
These routines are concerned with the evaluation of integer constant
expressions. They are so designed that the int_lit expressions are
precisely the constant-expressions from the grammar.
*/
extern EXP make_test_nat(EXP);
extern EXP make_unary_nat(unsigned, EXP);
extern EXP make_binary_nat(unsigned, EXP, EXP);
extern EXP make_compare_nat(NTEST, EXP, EXP);
extern EXP make_cond_nat(EXP, EXP, EXP);
extern EXP make_cast_nat(TYPE, EXP, ERROR *, unsigned);
extern EXP make_int_exp(TYPE, unsigned, NAT);
extern NAT make_nat_exp(EXP, ERROR *);
extern EXP calc_nat_value(NAT, TYPE);
#define SMALL_NAT_SIZE 257
#define SMALL_NAT_ALLOC 17
#define SMALL_FLT_SIZE 2
extern NAT small_neg_nat[SMALL_NAT_SIZE];
extern NAT small_nat[SMALL_NAT_SIZE];
extern string small_number[SMALL_FLT_SIZE];
#endif