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