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