xref: /PHP-8.3/ext/bcmath/libbcmath/src/int2num.c (revision e56ed6e1)
1 /* int2num.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 
34 /* Convert an integer VAL to a bc number NUM. */
35 
bc_int2num(bc_num * num,int val)36 void bc_int2num(bc_num *num, int val)
37 {
38 	char buffer[30];
39 	char *bptr, *vptr;
40 	int ix = 1;
41 	char neg = 0;
42 
43 	/* Sign. */
44 	if (val < 0) {
45 		neg = 1;
46 		val = -val;
47 	}
48 
49 	/* Get things going. */
50 	bptr = buffer;
51 	*bptr++ = val % BASE;
52 	val = val / BASE;
53 
54 	/* Extract remaining digits. */
55 	while (val != 0) {
56 		*bptr++ = val % BASE;
57 		val = val / BASE;
58 		/* Count the digits. */
59 		ix++;
60 	}
61 
62 	/* Make the number. */
63 	bc_free_num (num);
64 	*num = bc_new_num (ix, 0);
65 	if (neg) {
66 		(*num)->n_sign = MINUS;
67 	}
68 
69 	/* Assign the digits. */
70 	vptr = (*num)->n_value;
71 	while (ix-- > 0) {
72 		*vptr++ = *--bptr;
73 	}
74 }
75