odbc_number.h

/* odbc_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;

int init_numbers ();
void free_num (bc_num * num);
int str2num (bc_num * num, char *str, int scale);
char *num2str (bc_num num);
int bc_add (bc_num n1, bc_num n2, bc_num * result, int scale_min);
int bc_sub (bc_num n1, bc_num n2, bc_num * result, int scale_min);
int bc_multiply (bc_num n1, bc_num n2, bc_num * prod, int scale);
int bc_divide (bc_num n1, bc_num n2, bc_num * quot, int scale);
int bc_divmod (bc_num num1, bc_num num2, bc_num * quot, bc_num * rem,
	       int scale);