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Utils.h
1 /*
2  * This library is free software; you can redistribute it and/or
3  * modify it under the terms of the GNU Lesser General Public
4  * License as published by the Free Software Foundation; either
5  * version 2.1 of the License, or (at your option) any later version.
6  *
7  * This library is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
10  * Lesser General Public License for more details.
11  *
12  * You should have received a copy of the GNU Lesser General Public
13  * License along with this library; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15  *
16  * Utils.h
17  * Basic util helper functions.
18  * Copyright (C) 2013 Peter Newman
19  */
20 
21 #ifndef INCLUDE_OLA_UTIL_UTILS_H_
22 #define INCLUDE_OLA_UTIL_UTILS_H_
23 
24 #include <stdint.h>
25 
26 #include <limits>
27 
28 namespace ola {
29 namespace utils {
30 
37 inline void SplitUInt16(uint16_t input, uint8_t *high, uint8_t *low) {
38  *high = static_cast<uint8_t>((input >> std::numeric_limits<uint8_t>::digits) &
39  std::numeric_limits<uint8_t>::max());
40  *low = static_cast<uint8_t>(input & std::numeric_limits<uint8_t>::max());
41 }
42 
43 
50 inline uint16_t JoinUInt8(uint8_t high, uint8_t low) {
51  return static_cast<uint16_t>(
52  (static_cast<uint16_t>(high) << std::numeric_limits<uint8_t>::digits)
53  | low);
54 }
55 
56 
65 inline uint32_t JoinUInt8(uint8_t byte0, uint8_t byte1, uint8_t byte2,
66  uint8_t byte3) {
67  return ((static_cast<uint32_t>(byte0) <<
68  (std::numeric_limits<uint8_t>::digits * 3))
69  | (static_cast<uint32_t>(byte1) <<
70  (std::numeric_limits<uint8_t>::digits * 2))
71  | (static_cast<uint32_t>(byte2) <<
72  (std::numeric_limits<uint8_t>::digits))
73  | byte3);
74 }
75 } // namespace utils
76 } // namespace ola
77 #endif // INCLUDE_OLA_UTIL_UTILS_H_
uint16_t JoinUInt8(uint8_t high, uint8_t low)
Convert two uint8_t's to a uint16_t.
Definition: Utils.h:50
void SplitUInt16(uint16_t input, uint8_t *high, uint8_t *low)
Convert a uint16_t to two uint8_t's.
Definition: Utils.h:37
The namespace containing all OLA symbols.
Definition: Credentials.cpp:44