jcs.org
fork of PCE focusing on macplus, supporting DaynaPort SCSI network emulation
1/*****************************************************************************
2 * pce *
3 *****************************************************************************/
4
5/*****************************************************************************
6 * File name: src/lib/endian.h *
7 * Created: 2022-02-12 by Hampa Hug <hampa@hampa.ch> *
8 * Copyright: (C) 2022 Hampa Hug <hampa@hampa.ch> *
9 *****************************************************************************/
10
11/*****************************************************************************
12 * This program is free software. You can redistribute it and / or modify it *
13 * under the terms of the GNU General Public License version 2 as published *
14 * by the Free Software Foundation. *
15 * *
16 * This program is distributed in the hope that it will be useful, but *
17 * WITHOUT ANY WARRANTY, without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General *
19 * Public License for more details. *
20 *****************************************************************************/
21
22
23#ifndef PCE_LIB_ENDIAN_H
24#define PCE_LIB_ENDIAN_H 1
25
26
27#include <stdint.h>
28
29
30static inline
31void set_uint8 (void *buf, unsigned idx, uint8_t val)
32{
33 uint8_t *p = (uint8_t *) buf + idx;
34
35 p[0] = val & 0xff;
36}
37
38static inline
39void set_uint16_be (void *buf, unsigned idx, uint16_t val)
40{
41 uint8_t *p = (uint8_t *) buf + idx;
42
43 p[0] = (val >> 8) & 0xff;
44 p[1] = val & 0xff;
45}
46
47static inline
48void set_uint16_le (void *buf, unsigned idx, uint16_t val)
49{
50 uint8_t *p = (uint8_t *) buf + idx;
51
52 p[0] = val & 0xff;
53 p[1] = (val >> 8) & 0xff;
54}
55
56static inline
57void set_uint32_be (void *buf, unsigned idx, uint32_t val)
58{
59 uint8_t *p = (uint8_t *) buf + idx;
60
61 p[0] = (val >> 24) & 0xff;
62 p[1] = (val >> 16) & 0xff;
63 p[2] = (val >> 8) & 0xff;
64 p[3] = val & 0xff;
65}
66
67static inline
68void set_uint32_le (void *buf, unsigned idx, uint32_t val)
69{
70 uint8_t *p = (uint8_t *) buf + idx;
71
72 p[0] = val & 0xff;
73 p[1] = (val >> 8) & 0xff;
74 p[2] = (val >> 16) & 0xff;
75 p[3] = (val >> 24) & 0xff;
76}
77
78static inline
79uint8_t get_uint8 (const void *buf, unsigned idx)
80{
81 const uint8_t *p = (const uint8_t *) buf + idx;
82
83 return (*p & 0xff);
84}
85
86static inline
87uint16_t get_uint16_be (const void *buf, unsigned idx)
88{
89 uint16_t val;
90 const uint8_t *p = (const uint8_t *) buf + idx;
91
92 val = p[0] & 0xff;
93 val = (val << 8) | (p[1] & 0xff);
94
95 return (val);
96}
97
98static inline
99uint16_t get_uint16_le (const void *buf, unsigned idx)
100{
101 uint16_t val;
102 const uint8_t *p = (const uint8_t *) buf + idx;
103
104 val = p[1] & 0xff;
105 val = (val << 8) | (p[0] & 0xff);
106
107 return (val);
108}
109
110static inline
111uint32_t get_uint32_be (const void *buf, unsigned idx)
112{
113 uint32_t val;
114 const uint8_t *p = (const uint8_t *) buf + idx;
115
116 val = p[0] & 0xff;
117 val = (val << 8) | (p[1] & 0xff);
118 val = (val << 8) | (p[2] & 0xff);
119 val = (val << 8) | (p[3] & 0xff);
120
121 return (val);
122}
123
124static inline
125uint32_t get_uint32_le (const void *buf, unsigned idx)
126{
127 uint32_t val;
128 const uint8_t *p = (const uint8_t *) buf + idx;
129
130 val = p[3] & 0xff;
131 val = (val << 8) | (p[2] & 0xff);
132 val = (val << 8) | (p[1] & 0xff);
133 val = (val << 8) | (p[0] & 0xff);
134
135 return (val);
136}
137
138
139#endif