2 * Copyright (c) 2017, The OpenThread Authors.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
31 * This file provides kinds of convertion functions.
34 #include "utils/hex.hpp"
45 int Hex2Bytes(const char *aHex, uint8_t *aBytes, uint16_t aBytesLength)
47 size_t hexLength = strlen(aHex);
48 const char *hexEnd = aHex + hexLength;
49 uint8_t * cur = aBytes;
50 uint8_t numChars = hexLength & 1;
53 if ((hexLength + 1) / 2 > aBytesLength)
60 if ('A' <= *aHex && *aHex <= 'F')
62 byte |= 10 + (*aHex - 'A');
64 else if ('a' <= *aHex && *aHex <= 'f')
66 byte |= 10 + (*aHex - 'a');
68 else if ('0' <= *aHex && *aHex <= '9')
92 return static_cast<int>(cur - aBytes);
95 size_t Bytes2Hex(const uint8_t *aBytes, const uint16_t aBytesLength, char *aHex)
99 std::string hexString;
100 uint8_t cur[aBytesLength];
102 memcpy(cur, aBytes, aBytesLength);
104 for (int i = 0; i < aBytesLength; i++)
106 sprintf(byteHex, "%02X", cur[i]);
107 hexString += byteHex;
109 strcpy(aHex, hexString.c_str());
113 size_t Long2Hex(const uint64_t aLong, char *aHex)
115 std::string hexString;
117 uint64_t longValue = aLong;
119 for (uint8_t i = 0; i < sizeof(uint64_t); i++)
121 uint8_t byte = longValue & 0xff;
122 sprintf(byteHex, "%02X", byte);
123 hexString += byteHex;
124 longValue = longValue >> 8;
126 strcpy(aHex, hexString.c_str());