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/* number.h: Arbitrary precision numbers header file. */
/* This file is part of GNU bc.
Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, 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; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
You may contact the author by:
e-mail: phil@cs.wwu.edu
us-mail: Philip A. Nelson
Computer Science Department, 9062
Western Washington University
Bellingham, WA 98226-9062
*************************************************************************/
typedef enum {PLUS, MINUS} sign;
typedef struct
{
sign n_sign;
int n_len; /* The number of digits before the decimal point. */
int n_scale; /* The number of digits after the decimal point. */
int n_refs; /* The number of pointers to this number. */
char n_value[1]; /* The storage. Not zero char terminated. It is
allocated with all other fields. */
} bc_struct;
typedef bc_struct *bc_num;
/* The base used in storing the numbers in n_value above.
Currently this MUST be 10. */
#define BASE 10
/* Some useful macros and constants. */
#define CH_VAL(c) (c - '0')
#define BCD_CHAR(d) (d + '0')
#ifdef MIN
#undef MIN
#undef MAX
#endif
#define MAX(a,b) ((a)>(b)?(a):(b))
#define MIN(a,b) ((a)>(b)?(b):(a))
#define ODD(a) ((a)&1)
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
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