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1 | /* number.h: Arbitrary precision numbers header file. */ |
2 | ||
3 | /* This file is part of bc written for MINIX. | |
4 | Copyright (C) 1991, 1992 Free Software Foundation, Inc. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License , or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | You may contact the author by: | |
21 | e-mail: phil@cs.wwu.edu | |
22 | us-mail: Philip A. Nelson | |
23 | Computer Science Department, 9062 | |
24 | Western Washington University | |
25 | Bellingham, WA 98226-9062 | |
26 | ||
27 | *************************************************************************/ | |
28 | ||
29 | ||
30 | typedef enum {PLUS, MINUS} sign; | |
31 | ||
32 | typedef struct | |
33 | { | |
34 | sign n_sign; | |
35 | int n_len; /* The number of digits before the decimal point. */ | |
36 | int n_scale; /* The number of digits after the decimal point. */ | |
37 | int n_refs; /* The number of pointers to this number. */ | |
38 | char n_value[1]; /* The storage. Not zero char terminated. It is | |
39 | allocated with all other fields. */ | |
40 | } bc_struct; | |
41 | ||
42 | typedef bc_struct *bc_num; | |
43 | ||
44 | /* Some useful macros and constants. */ | |
45 | ||
46 | #define CH_VAL(c) (c - '0') | |
47 | #define BCD_CHAR(d) (d + '0') | |
48 | ||
49 | #ifdef MIN | |
50 | #undef MIN | |
51 | #undef MAX | |
52 | #endif | |
53 | #define MAX(a,b) (a>b?a:b) | |
54 | #define MIN(a,b) (a>b?b:a) | |
55 | #define ODD(a) (a&1) | |
56 | ||
57 | #ifndef TRUE | |
58 | #define TRUE 1 | |
59 | #define FALSE 0 | |
60 | #endif |