66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
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/* number.h: Arbitrary precision numbers header file. */
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/* This file is part of GNU bc.
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Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License , or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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You may contact the author by:
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e-mail: phil@cs.wwu.edu
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us-mail: Philip A. Nelson
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Computer Science Department, 9062
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Western Washington University
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Bellingham, WA 98226-9062
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*************************************************************************/
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typedef enum {PLUS, MINUS} sign;
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typedef struct
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{
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sign n_sign;
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int n_len; /* The number of digits before the decimal point. */
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int n_scale; /* The number of digits after the decimal point. */
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int n_refs; /* The number of pointers to this number. */
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char n_value[1]; /* The storage. Not zero char terminated. It is
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allocated with all other fields. */
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} bc_struct;
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typedef bc_struct *bc_num;
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/* The base used in storing the numbers in n_value above.
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Currently this MUST be 10. */
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#define BASE 10
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/* Some useful macros and constants. */
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#define CH_VAL(c) (c - '0')
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#define BCD_CHAR(d) (d + '0')
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#ifdef MIN
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#undef MIN
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#undef MAX
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#endif
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#define MIN(a,b) ((a)>(b)?(b):(a))
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#define ODD(a) ((a)&1)
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#ifndef TRUE
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#define TRUE 1
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#define FALSE 0
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#endif
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