ceph/src/boost/libs/convert/test/prepare.hpp

   1 // Boost.Convert test and usage example
   2 // Copyright (c) 2009-2016 Vladimir Batov.
   3 // Use, modification and distribution are subject to the Boost Software License,
   4 // Version 1.0. See http://www.boost.org/LICENSE_1_0.txt.
   5
   6 #ifndef BOOST_CONVERT_TEST_PREPARE_HPP
   7 #define BOOST_CONVERT_TEST_PREPARE_HPP
   8
   9 #include <boost/array.hpp>
  10 #include <ctime>
  11 #include <cstdlib>
  12
  13 // boostinspect:nounnamed
  14 namespace { namespace local
  15 {
  16     // C1. 18 = 9 positive + 9 negative numbers with the number of digits from 1 to 9.
  17     //     Even though INT_MAX(32) = 2147483647, i.e. 10 digits (not to mention long int)
  18     //     we only test up to 9 digits as Spirit does not handle more than 9.
  19
  20     typedef boost::array<my_string, 18> strings; //C1
  21     ///////////////////////////////////////////////////////////////////////////
  22     // Generate a random number string with N digits
  23     std::string
  24     gen_int(int digits, bool negative)
  25     {
  26         std::string result;
  27
  28         if (negative)                       // Prepend a '-'
  29             result += '-';
  30
  31         result += '1' + (std::rand()%9);         // The first digit cannot be '0'
  32
  33         for (int i = 1; i < digits; ++i)    // Generate the remaining digits
  34             result += '0' + (std::rand()%10);
  35         return result;
  36     }
  37
  38     local::strings const&
  39     get_strs()
  40     {
  41         static local::strings strings;
  42         static bool            filled;
  43         static bool          negative = true;
  44
  45         if (!filled)
  46         {
  47             // Seed the random generator
  48             std::srand(std::time(0));
  49
  50             for (size_t k = 0; k < strings.size(); ++k)
  51                 strings[k] = local::gen_int(k/2 + 1, negative = !negative).c_str();
  52
  53             filled = true;
  54         }
  55         return strings;
  56     }
  57 }}
  58
  59 #endif // BOOST_CONVERT_TEST_PREPARE_HPP