1 /* init.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 <config.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <ctype.h>
36 #include <stdarg.h>
37 #include "bcmath.h"
38 #include "private.h"
39
40 /* new_num allocates a number and sets fields to known values. */
41
42 bc_num
_bc_new_num_ex(length,scale,persistent)43 _bc_new_num_ex (length, scale, persistent)
44 int length, scale, persistent;
45 {
46 bc_num temp;
47 /* PHP Change: malloc() -> pemalloc(), removed free_list code */
48 temp = (bc_num) safe_pemalloc (1, sizeof(bc_struct)+length, scale, persistent);
49 temp->n_sign = PLUS;
50 temp->n_len = length;
51 temp->n_scale = scale;
52 temp->n_refs = 1;
53 /* PHP Change: malloc() -> pemalloc() */
54 temp->n_ptr = (char *) safe_pemalloc (1, length, scale, persistent);
55 temp->n_value = temp->n_ptr;
56 memset (temp->n_ptr, 0, length+scale);
57 return temp;
58 }
59
60
61 /* "Frees" a bc_num NUM. Actually decreases reference count and only
62 frees the storage if reference count is zero. */
63
64 void
_bc_free_num_ex(num,persistent)65 _bc_free_num_ex (num, persistent)
66 bc_num *num;
67 int persistent;
68 {
69 if (*num == NULL) return;
70 (*num)->n_refs--;
71 if ((*num)->n_refs == 0) {
72 if ((*num)->n_ptr)
73 /* PHP Change: free() -> pefree(), removed free_list code */
74 pefree ((*num)->n_ptr, persistent);
75 pefree(*num, persistent);
76 }
77 *num = NULL;
78 }
79
80
81 /* Initialize the number package! */
82
83 void
bc_init_numbers(void)84 bc_init_numbers (void)
85 {
86 BCG(_zero_) = _bc_new_num_ex (1,0,1);
87 BCG(_one_) = _bc_new_num_ex (1,0,1);
88 BCG(_one_)->n_value[0] = 1;
89 BCG(_two_) = _bc_new_num_ex (1,0,1);
90 BCG(_two_)->n_value[0] = 2;
91 }
92
93
94 /* Make a copy of a number! Just increments the reference count! */
95
96 bc_num
bc_copy_num(bc_num num)97 bc_copy_num (bc_num num)
98 {
99 num->n_refs++;
100 return num;
101 }
102
103
104 /* Initialize a number NUM by making it a copy of zero. */
105
106 void
bc_init_num(bc_num * num)107 bc_init_num (bc_num *num)
108 {
109 *num = bc_copy_num (BCG(_zero_));
110 }
111
