1 /* rmzero.c: bcmath library file. */
2 /*
3 Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
4 Copyright (C) 2000 Philip A. Nelson
5
6 This library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2 of the License, or (at your option) any later version.
10
11 This library 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 GNU
14 Lesser General Public License for more details. (LICENSE)
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with this library; if not, write to:
18
19 The Free Software Foundation, Inc.
20 59 Temple Place, Suite 330
21 Boston, MA 02111-1307 USA.
22
23 You may contact the author by:
24 e-mail: philnelson@acm.org
25 us-mail: Philip A. Nelson
26 Computer Science Department, 9062
27 Western Washington University
28 Bellingham, WA 98226-9062
29
30 *************************************************************************/
31
32 #include "bcmath.h"
33 #include "private.h"
34
35 /* For many things, we may have leading zeros in a number NUM.
36 _bc_rm_leading_zeros just moves the data "value" pointer to the
37 correct place and adjusts the length. */
38
_bc_rm_leading_zeros(bc_num num)39 void _bc_rm_leading_zeros(bc_num num)
40 {
41 /* We can move n_value to point to the first non-zero digit! */
42 while (*num->n_value == 0 && num->n_len > 1) {
43 num->n_value++;
44 num->n_len--;
45 }
46 }
47
bc_rm_trailing_zeros(bc_num num)48 void bc_rm_trailing_zeros(bc_num num)
49 {
50 if (num->n_scale == 0) {
51 return;
52 }
53
54 char *end = num->n_value + num->n_len + num->n_scale - 1;
55 while (*end == 0 && num->n_scale > 0) {
56 num->n_scale--;
57 end--;
58 }
59 }
60
