From a5dd54fbf8b6768423c48786b6a2afaf9a8ece0e Mon Sep 17 00:00:00 2001 From: chai Date: Mon, 13 Dec 2021 15:00:32 +0800 Subject: *misc --- Client/Source/Utilities/hex.h | 60 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Client/Source/Utilities/hex.h (limited to 'Client/Source/Utilities/hex.h') diff --git a/Client/Source/Utilities/hex.h b/Client/Source/Utilities/hex.h new file mode 100644 index 0000000..708f330 --- /dev/null +++ b/Client/Source/Utilities/hex.h @@ -0,0 +1,60 @@ +/* +Minetest +Copyright (C) 2013 Jonathan Neuschäfer + +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 + +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(const std::string &data) +{ + return hex_encode(data.c_str(), 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; +} -- cgit v1.1-26-g67d0