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- /*
- Minetest
- Copyright (C) 2013 Jonathan Neuschäfer <j.neuschaefer@gmx.net>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #pragma once
- #include <string>
- #include <string_view>
- static const char hex_chars[] = "0123456789abcdef";
- static inline std::string hex_encode(const char *data, unsigned int data_size)
- {
- std::string ret;
- ret.reserve(data_size * 2);
- char buf2[3];
- buf2[2] = '\0';
- for (unsigned int i = 0; i < data_size; i++) {
- unsigned char c = (unsigned char)data[i];
- buf2[0] = hex_chars[(c & 0xf0) >> 4];
- buf2[1] = hex_chars[c & 0x0f];
- ret.append(buf2);
- }
- return ret;
- }
- static inline std::string hex_encode(std::string_view data)
- {
- return hex_encode(data.data(), data.size());
- }
- static inline bool hex_digit_decode(char hexdigit, unsigned char &value)
- {
- if (hexdigit >= '0' && hexdigit <= '9')
- value = hexdigit - '0';
- else if (hexdigit >= 'A' && hexdigit <= 'F')
- value = hexdigit - 'A' + 10;
- else if (hexdigit >= 'a' && hexdigit <= 'f')
- value = hexdigit - 'a' + 10;
- else
- return false;
- return true;
- }
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