Cleanup: Use correct format string
[hmcfgusb] / util.c
1 /* utility functions
2 *
3 * Copyright (c) 2014-16 Michael Gernoth <michael@gernoth.net>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to
7 * deal in the Software without restriction, including without limitation the
8 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
9 * sell copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include <inttypes.h>
25
26 uint8_t ascii_to_nibble(uint8_t a)
27 {
28 uint8_t c = 0x00;
29
30 if ((a >= '0') && (a <= '9')) {
31 c = a - '0';
32 } else if ((a >= 'A') && (a <= 'F')) {
33 c = (a - 'A') + 10;
34 } else if ((a >= 'a') && (a <= 'f')) {
35 c = (a - 'a') + 10;
36 }
37
38 return c;
39 }
40
41 int validate_nibble(uint8_t a)
42 {
43 if (((a >= '0') && (a <= '9')) ||
44 ((a >= 'A') && (a <= 'F')) ||
45 ((a >= 'a') && (a <= 'f')))
46 return 1;
47
48 return 0;
49 }
50
51 char nibble_to_ascii(uint8_t n)
52 {
53 const uint8_t nibble[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
54 'A', 'B', 'C', 'D', 'E', 'F'};
55
56 return nibble[n];
57 }
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