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/*
* Header file for decimal.c (arbitrary precision decimal arithmetic)
*
* Copyright (C) 1984 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, 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; if not, you can either send email to this
* program's author (see below) or write to: The Free Software Foundation,
* Inc.; 675 Mass Ave. Cambridge, MA 02139, USA.
*/
/* Autoconf stuff */
#ifndef HAVE_BCOPY
#undef bcopy
#define bcopy(s2, s1, n) memcpy (s1, s2, n)
#endif
#ifndef HAVE_BZERO
#undef bzero
#define bzero(b, l) memset (b, 0, l)
#endif
/* Define the radix to use by default, and for representing the
numbers internally. This does not need to be decimal; that is just
the default for it. */
/* Currently, this is required to be even for this program to work. */
#ifndef RADIX
#define RADIX 10
#endif
/* The user must define the external function `decimal_error'
which is called with two arguments to report errors in this package.
The two arguments may be passed to `printf' to print a message. */
/* Structure that represents a decimal number */
struct decimal
{
unsigned int sign: 1; /* One for negative number */
/* The sign should always be zero for the number 0 */
int after: 15; /* number of fraction digits */
unsigned short before; /* number of non-fraction digits */
unsigned short refcnt; /* number of pointers to this number */
/* (used by calling program) */
char contents[1]; /* the digits themselves, least significant first. */
/* digits are just numbers 0 .. RADIX-1 */
};
/* There may never be leading nonfraction zeros or trailing fraction
zeros in a number. They must be removed by all the arithmetic
functions. Therefore, the number zero always has no digits stored. */
typedef struct decimal *decimal;
/* Decimal numbers are always passed around as pointers.
All the external entries in this file allocate new numbers
using `malloc' to store values in.
They never modify their arguments or any existing numbers. */
/* Return the total number of digits stored in the number `b' */
#define LENGTH(b) ((b)->before + (b)->after)
/* Some constant decimal numbers */
#define DECIMAL_ZERO &decimal_zero
#define DECIMAL_ONE &decimal_one
#define DECIMAL_HALF &decimal_half
decimal decimal_add (), decimal_sub (), decimal_mul (), decimal_div ();
decimal decimal_mul_dc (), decimal_mul_rounded (), decimal_rem ();
decimal decimal_round_digits (), decimal_trunc_digits ();
decimal make_decimal (), decimal_copy (), decimal_parse ();
decimal decimal_sqrt (), decimal_expt ();
void decimal_print ();
/* End of decimal.h */
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