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  1. /*
  2.  *
  3.  *  Copyright (C) 2010  Mattias Runge
  4.  *
  5.  *  This program is free software; you can redistribute it and/or modify
  6.  *  it under the terms of the GNU General Public License as published by
  7.  *  the Free Software Foundation; either version 2 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 General Public License for more details.
  14.  *
  15.  *  You should have received a copy of the GNU 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.  
  21. #include "common.h"
  22.  
  23. namespace atom {
  24. namespace common {
  25.  
  26. std::string PadNumber(unsigned int number, unsigned int length)
  27. {
  28.     std::string padded_string = boost::lexical_cast<std::string>(number);
  29.    
  30.     while (padded_string.length() < length)
  31.     {
  32.         padded_string = "0" + padded_string;
  33.     }
  34.    
  35.     return padded_string;
  36. }
  37.    
  38. std::string ToHex(unsigned int value)
  39. {
  40.     char hex_string[11];
  41.    
  42.     snprintf(hex_string, sizeof(hex_string), "0x%08X", value);
  43.    
  44.     return std::string(hex_string);
  45.    
  46. }
  47.  
  48. unsigned int FromHex(std::string hex_chars)
  49. {
  50.     int value = 0;
  51.     int ascii_value;
  52.    
  53.     for (int n = hex_chars.length() - 1; n >= 0; n--)
  54.     {
  55.         ascii_value = (int)hex_chars.data()[n];
  56.        
  57.         if (48 <= ascii_value && ascii_value <= 57)
  58.         {
  59.             value |= (ascii_value - 48) << n;
  60.         }
  61.         else if (65 <= ascii_value && ascii_value <= 70)
  62.         {
  63.             value |= (ascii_value - 65) << n;
  64.         }
  65.         else
  66.         {
  67.             throw std::runtime_error("This is not an hex string, hex_chars = " + hex_chars + ", ascii_value = " + boost::lexical_cast<std::string>(ascii_value) + ", n = " + boost::lexical_cast<std::string>(n) + ", length = " + boost::lexical_cast<std::string>(hex_chars.length()));
  68.         }
  69.     }
  70.    
  71.     return value;
  72. }
  73.    
  74. }; // namespace type
  75. }; // namespace atom
  76.