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1 office 1 /**
2 * @file read_write_int.h
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29  
30 #ifndef BADVPN_READ_WRITE_INT_H
31 #define BADVPN_READ_WRITE_INT_H
32  
33 #include <stdint.h>
34  
35 static uint8_t badvpn_read_le8 (const char *c_ptr);
36 static uint16_t badvpn_read_le16 (const char *c_ptr);
37 static uint32_t badvpn_read_le32 (const char *c_ptr);
38 static uint64_t badvpn_read_le64 (const char *c_ptr);
39  
40 static uint8_t badvpn_read_be8 (const char *c_ptr);
41 static uint16_t badvpn_read_be16 (const char *c_ptr);
42 static uint32_t badvpn_read_be32 (const char *c_ptr);
43 static uint64_t badvpn_read_be64 (const char *c_ptr);
44  
45 static void badvpn_write_le8 (uint8_t x, char *c_ptr);
46 static void badvpn_write_le16 (uint16_t x, char *c_ptr);
47 static void badvpn_write_le32 (uint32_t x, char *c_ptr);
48 static void badvpn_write_le64 (uint64_t x, char *c_ptr);
49  
50 static void badvpn_write_be8 (uint8_t x, char *c_ptr);
51 static void badvpn_write_be16 (uint16_t x, char *c_ptr);
52 static void badvpn_write_be32 (uint32_t x, char *c_ptr);
53 static void badvpn_write_be64 (uint64_t x, char *c_ptr);
54  
55 static uint8_t badvpn_read_le8 (const char *c_ptr)
56 {
57 const uint8_t *ptr = (const uint8_t *)c_ptr;
58 return ((uint8_t)ptr[0] << 0);
59 }
60  
61 static uint16_t badvpn_read_le16 (const char *c_ptr)
62 {
63 const uint8_t *ptr = (const uint8_t *)c_ptr;
64 return ((uint16_t)ptr[1] << 8) | ((uint16_t)ptr[0] << 0);
65 }
66  
67 static uint32_t badvpn_read_le32 (const char *c_ptr)
68 {
69 const uint8_t *ptr = (const uint8_t *)c_ptr;
70 return ((uint32_t)ptr[3] << 24) | ((uint32_t)ptr[2] << 16) |
71 ((uint32_t)ptr[1] << 8) | ((uint32_t)ptr[0] << 0);
72 }
73  
74 static uint64_t badvpn_read_le64 (const char *c_ptr)
75 {
76 const uint8_t *ptr = (const uint8_t *)c_ptr;
77 return ((uint64_t)ptr[7] << 56) | ((uint64_t)ptr[6] << 48) |
78 ((uint64_t)ptr[5] << 40) | ((uint64_t)ptr[4] << 32) |
79 ((uint64_t)ptr[3] << 24) | ((uint64_t)ptr[2] << 16) |
80 ((uint64_t)ptr[1] << 8) | ((uint64_t)ptr[0] << 0);
81 }
82  
83 static uint8_t badvpn_read_be8 (const char *c_ptr)
84 {
85 const uint8_t *ptr = (const uint8_t *)c_ptr;
86 return ((uint8_t)ptr[0] << 0);
87 }
88  
89 static uint16_t badvpn_read_be16 (const char *c_ptr)
90 {
91 const uint8_t *ptr = (const uint8_t *)c_ptr;
92 return ((uint16_t)ptr[0] << 8) | ((uint16_t)ptr[1] << 0);
93 }
94  
95 static uint32_t badvpn_read_be32 (const char *c_ptr)
96 {
97 const uint8_t *ptr = (const uint8_t *)c_ptr;
98 return ((uint32_t)ptr[0] << 24) | ((uint32_t)ptr[1] << 16) |
99 ((uint32_t)ptr[2] << 8) | ((uint32_t)ptr[3] << 0);
100 }
101  
102 static uint64_t badvpn_read_be64 (const char *c_ptr)
103 {
104 const uint8_t *ptr = (const uint8_t *)c_ptr;
105 return ((uint64_t)ptr[0] << 56) | ((uint64_t)ptr[1] << 48) |
106 ((uint64_t)ptr[2] << 40) | ((uint64_t)ptr[3] << 32) |
107 ((uint64_t)ptr[4] << 24) | ((uint64_t)ptr[5] << 16) |
108 ((uint64_t)ptr[6] << 8) | ((uint64_t)ptr[7] << 0);
109 }
110  
111 static void badvpn_write_le8 (uint8_t x, char *c_ptr)
112 {
113 uint8_t *ptr = (uint8_t *)c_ptr;
114 ptr[0] = x >> 0;
115 }
116  
117 static void badvpn_write_le16 (uint16_t x, char *c_ptr)
118 {
119 uint8_t *ptr = (uint8_t *)c_ptr;
120 ptr[1] = x >> 8;
121 ptr[0] = x >> 0;
122 }
123  
124 static void badvpn_write_le32 (uint32_t x, char *c_ptr)
125 {
126 uint8_t *ptr = (uint8_t *)c_ptr;
127 ptr[3] = x >> 24;
128 ptr[2] = x >> 16;
129 ptr[1] = x >> 8;
130 ptr[0] = x >> 0;
131 }
132  
133 static void badvpn_write_le64 (uint64_t x, char *c_ptr)
134 {
135 uint8_t *ptr = (uint8_t *)c_ptr;
136 ptr[7] = x >> 56;
137 ptr[6] = x >> 48;
138 ptr[5] = x >> 40;
139 ptr[4] = x >> 32;
140 ptr[3] = x >> 24;
141 ptr[2] = x >> 16;
142 ptr[1] = x >> 8;
143 ptr[0] = x >> 0;
144 }
145  
146 static void badvpn_write_be8 (uint8_t x, char *c_ptr)
147 {
148 uint8_t *ptr = (uint8_t *)c_ptr;
149 ptr[0] = x >> 0;
150 }
151  
152 static void badvpn_write_be16 (uint16_t x, char *c_ptr)
153 {
154 uint8_t *ptr = (uint8_t *)c_ptr;
155 ptr[0] = x >> 8;
156 ptr[1] = x >> 0;
157 }
158  
159 static void badvpn_write_be32 (uint32_t x, char *c_ptr)
160 {
161 uint8_t *ptr = (uint8_t *)c_ptr;
162 ptr[0] = x >> 24;
163 ptr[1] = x >> 16;
164 ptr[2] = x >> 8;
165 ptr[3] = x >> 0;
166 }
167  
168 static void badvpn_write_be64 (uint64_t x, char *c_ptr)
169 {
170 uint8_t *ptr = (uint8_t *)c_ptr;
171 ptr[0] = x >> 56;
172 ptr[1] = x >> 48;
173 ptr[2] = x >> 40;
174 ptr[3] = x >> 32;
175 ptr[4] = x >> 24;
176 ptr[5] = x >> 16;
177 ptr[6] = x >> 8;
178 ptr[7] = x >> 0;
179 }
180  
181 #endif