Line data    Source code

       1             : /*
       2             : Minetest
       3             : Copyright (C) 2013 Jonathan Neuschäfer <j.neuschaefer@gmx.net>
       4             : 
       5             : This program is free software; you can redistribute it and/or modify
       6             : it under the terms of the GNU Lesser General Public License as published by
       7             : the Free Software Foundation; either version 2.1 of the License, or
       8             : (at your option) any later version.
       9             : 
      10             : This program is distributed in the hope that it will be useful,
      11             : but WITHOUT ANY WARRANTY; without even the implied warranty of
      12             : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13             : GNU Lesser General Public License for more details.
      14             : 
      15             : You should have received a copy of the GNU Lesser General Public License along
      16             : with this program; if not, write to the Free Software Foundation, Inc.,
      17             : 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      18             : */
      19             : 
      20             : #ifndef HEX_HEADER
      21             : #define HEX_HEADER
      22             : 
      23             : #include <string>
      24             : 
      25             : static const char hex_chars[] = "0123456789abcdef";
      26             : 
      27        5270 : static inline std::string hex_encode(const char *data, unsigned int data_size)
      28             : {
      29        5270 :         std::string ret;
      30             :         char buf2[3];
      31        5270 :         buf2[2] = '\0';
      32             : 
      33      110670 :         for(unsigned int i = 0; i < data_size; i++)
      34             :         {
      35      105400 :                 unsigned char c = (unsigned char) data[i];
      36      105400 :                 buf2[0] = hex_chars[(c & 0xf0) >> 4];
      37      105400 :                 buf2[1] = hex_chars[c & 0x0f];
      38      105400 :                 ret.append(buf2);
      39             :         }
      40             : 
      41        5270 :         return ret;
      42             : }
      43             : 
      44        5270 : static inline std::string hex_encode(const std::string &data)
      45             : {
      46        5270 :     return hex_encode(data.c_str(), data.size());
      47             : }
      48             : 
      49        1248 : static inline bool hex_digit_decode(char hexdigit, unsigned char &value)
      50             : {
      51        1248 :         if(hexdigit >= '0' && hexdigit <= '9')
      52         599 :                 value = hexdigit - '0';
      53         649 :         else if(hexdigit >= 'A' && hexdigit <= 'F')
      54           0 :                 value = hexdigit - 'A' + 10;
      55         649 :         else if(hexdigit >= 'a' && hexdigit <= 'f')
      56         649 :                 value = hexdigit - 'a' + 10;
      57             :         else
      58           0 :                 return false;
      59        1248 :         return true;
      60             : }
      61             : 
      62             : #endif