1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
Copyright (C) 2015-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/
/*
WARNING: This file was generated by the dkct program (see
http://dktools.sourceforge.net/ for details).
Changes you make here will be lost if dkct is run again!
You should modify the original source and run dkct on it.
Original source: dk4bf.ctr
*/
/** @file dk4bf.c The dk4bf module.
*/
#line 97 "dk4bf.ctr"
#include "dk4conf.h"
#if DK4_HAVE_ASSERT_H
#ifndef ASSERT_H_INCLUDED
#include <assert.h>
#define ASSERT_H_INCLUDED 1
#endif
#endif
#include "dk4bf.h"
#include "dk4mem.h"
#line 113 "dk4bf.ctr"
/** Position of single bits within a byte.
*/
static const unsigned char dk4bf_bits_in_byte[] = {
0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01
};
dk4_bit_field_t *
dk4bf_open(size_t sz, dk4_er_t *erp)
{
dk4_bit_field_t *back = NULL;
size_t bsz;
#if DK4_USE_ASSERT
assert(0 < sz);
#endif
if (0 < sz) {
back = dk4mem_new(dk4_bit_field_t,1,erp);
if (NULL != back) {
back->s = sz;
bsz = sz / 8;
if (0 != (sz % 8)) {
bsz++;
}
back->d = dk4mem_new(unsigned char,bsz,erp);
if (NULL == back->d) {
dk4bf_close(back);
back = NULL;
}
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
int
dk4bf_set(dk4_bit_field_t *dptr, size_t bitno, int val, dk4_er_t *erp)
{
size_t bytei; /* Byte index */
size_t biti; /* Bit index */
int back = 0;
#if DK4_USE_ASSERT
assert(NULL != dptr);
#endif
if (NULL != dptr) {
if (bitno < dptr->s) {
bytei = bitno / 8;
biti = bitno % 8;
if (0 != val) {
(dptr->d)[bytei] |= dk4bf_bits_in_byte[biti];
} else {
(dptr->d)[bytei] &= (~(dk4bf_bits_in_byte[biti]));
}
back = 1;
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
int
dk4bf_get(int *dptr, dk4_bit_field_t const *bfptr, size_t bitno, dk4_er_t *erp)
{
size_t bytei; /* Byte index */
size_t biti; /* Bit index within byte */
int back = 0;
#if DK4_USE_ASSERT
assert(NULL != dptr);
assert(NULL != bfptr);
#endif
if ((NULL != dptr) && (NULL != bfptr)) {
if (bitno < bfptr->s) {
bytei = bitno / 8;
biti = bitno % 8;
if (0x00 != (((bfptr->d)[bytei]) & (dk4bf_bits_in_byte[biti]))) {
*dptr = 1;
} else {
*dptr = 0;
}
back = 1;
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
} else {
dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
}
return back;
}
void
dk4bf_close(dk4_bit_field_t *ptr)
{
#if DK4_USE_ASSERT
assert(NULL != ptr);
#endif
if (NULL != ptr) {
dk4mem_release(ptr->d);
dk4mem_free(ptr);
}
}
|