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. (COPYING.LIB)
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 <assert.h>
35 #include <stdlib.h>
36 #include <ctype.h>
37 #include <stdarg.h>
38 #include "bcmath.h"
39 #include "private.h"
40
41 #if SANDER_0
42 bc_num _bc_Free_list = NULL;
43 #endif
44
45 /* new_num allocates a number and sets fields to known values. */
46
47 bc_num
_bc_new_num_ex(length,scale,persistent)48 _bc_new_num_ex (length, scale, persistent)
49 int length, scale, persistent;
50 {
51 bc_num temp;
52
53 /* PHP Change: malloc() -> pemalloc(), removed free_list code */
54 temp = (bc_num) safe_pemalloc (1, sizeof(bc_struct)+length, scale, persistent);
55 #if 0
56 if (_bc_Free_list != NULL) {
57 temp = _bc_Free_list;
58 _bc_Free_list = temp->n_next;
59 } else {
60 temp = (bc_num) pemalloc (sizeof(bc_struct), persistent);
61 if (temp == NULL) bc_out_of_memory ();
62 }
63 #endif
64 temp->n_sign = PLUS;
65 temp->n_len = length;
66 temp->n_scale = scale;
67 temp->n_refs = 1;
68 /* PHP Change: malloc() -> pemalloc() */
69 temp->n_ptr = (char *) safe_pemalloc (1, length, scale, persistent);
70 if (temp->n_ptr == NULL) bc_out_of_memory();
71 temp->n_value = temp->n_ptr;
72 memset (temp->n_ptr, 0, length+scale);
73 return temp;
74 }
75
76
77 /* "Frees" a bc_num NUM. Actually decreases reference count and only
78 frees the storage if reference count is zero. */
79
80 void
_bc_free_num_ex(num,persistent)81 _bc_free_num_ex (num, persistent)
82 bc_num *num;
83 int persistent;
84 {
85 if (*num == NULL) return;
86 (*num)->n_refs--;
87 if ((*num)->n_refs == 0) {
88 if ((*num)->n_ptr)
89 /* PHP Change: free() -> pefree(), removed free_list code */
90 pefree ((*num)->n_ptr, persistent);
91 pefree(*num, persistent);
92 #if 0
93 (*num)->n_next = _bc_Free_list;
94 _bc_Free_list = *num;
95 #endif
96 }
97 *num = NULL;
98 }
99
100
101 /* Intitialize the number package! */
102
103 void
bc_init_numbers(TSRMLS_D)104 bc_init_numbers (TSRMLS_D)
105 {
106 BCG(_zero_) = _bc_new_num_ex (1,0,1);
107 BCG(_one_) = _bc_new_num_ex (1,0,1);
108 BCG(_one_)->n_value[0] = 1;
109 BCG(_two_) = _bc_new_num_ex (1,0,1);
110 BCG(_two_)->n_value[0] = 2;
111 }
112
113
114 /* Make a copy of a number! Just increments the reference count! */
115
116 bc_num
bc_copy_num(bc_num num)117 bc_copy_num (bc_num num)
118 {
119 num->n_refs++;
120 return num;
121 }
122
123
124 /* Initialize a number NUM by making it a copy of zero. */
125
126 void
bc_init_num(bc_num * num TSRMLS_DC)127 bc_init_num (bc_num *num TSRMLS_DC)
128 {
129 *num = bc_copy_num (BCG(_zero_));
130 }
131
132
