xref: /PHP-8.3/ext/bcmath/libbcmath/src/rmzero.c (revision e56ed6e1)
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