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.
8 #include <boost/convert.hpp>
9 #include <boost/convert/printf.hpp>
10 #include <boost/convert/stream.hpp>
11 #include <boost/detail/lightweight_test.hpp>
12 #include <boost/random/mersenne_twister.hpp>
13 #include <boost/random/uniform_int_distribution.hpp>
14 #include <boost/random/uniform_01.hpp>
15 #include <boost/lexical_cast.hpp>
17 //[strtol_basic_deployment_header
18 #include <boost/convert.hpp>
19 #include <boost/convert/strtol.hpp>
25 struct boost::cnv::by_default : public boost::cnv::strtol {};
32 string const bad_str = "not an int";
33 string const neg_str = "-11";
34 string const std_str = "11";
35 char const* const c_str = "12";
36 unsigned int const imax = (std::numeric_limits<unsigned int>::max)();
37 unsigned long int const lmax = (std::numeric_limits<unsigned long int>::max)();
38 std::string const imax_str = boost::lexical_cast<std::string>(imax);
39 std::string const lmax_str = boost::lexical_cast<std::string>(lmax);
41 BOOST_TEST( 0 == convert<unsigned int>(bad_str).value_or(0));
42 BOOST_TEST( 0 == convert<unsigned int>(neg_str).value_or(0));
43 BOOST_TEST( 0 == convert<unsigned long int>(neg_str).value_or(0));
44 BOOST_TEST( 0 == convert<unsigned long int>(neg_str).value_or(0));
45 BOOST_TEST(11 == convert<unsigned int>(std_str).value());
46 BOOST_TEST(12 == convert<unsigned int>( c_str).value());
47 BOOST_TEST(11 == convert<unsigned long int>(std_str).value());
48 BOOST_TEST(12 == convert<unsigned long int>( c_str).value());
49 BOOST_TEST(imax == convert< unsigned int>(imax_str).value());
50 BOOST_TEST(lmax == convert<unsigned long int>(lmax_str).value());
57 //[strtol_basic_deployment
58 string const bad_str = "not an int";
59 string const std_str = "-11";
60 char const* const c_str = "-12";
62 BOOST_TEST( -1 == convert<int>(bad_str).value_or(-1));
63 BOOST_TEST(-11 == convert<int>(std_str).value());
64 BOOST_TEST(-12 == convert<int>( c_str).value());
66 wstring const bad_wstr = L"not an int";
67 wstring const wstd_str = L"-11";
68 wchar_t const* const wc_str = L"-12";
70 BOOST_TEST( -1 == convert<int>(bad_wstr).value_or(-1));
71 BOOST_TEST(-11 == convert<int>(wstd_str).value());
72 BOOST_TEST(-12 == convert<int>( wc_str).value());
79 short const s_int = -123;
80 int const i_int = -123;
81 long const l_int = -123;
82 long long const ll_int = -123;
84 BOOST_TEST( "-123" == convert< std::string> ( s_int).value());
85 BOOST_TEST( "-123" == convert< std::string> ( i_int).value());
86 BOOST_TEST( "-123" == convert< std::string> ( l_int).value());
87 BOOST_TEST( "-123" == convert< std::string> (ll_int).value());
89 BOOST_TEST(L"-123" == convert<std::wstring> ( s_int).value());
90 BOOST_TEST(L"-123" == convert<std::wstring> ( i_int).value());
91 BOOST_TEST(L"-123" == convert<std::wstring> ( l_int).value());
92 BOOST_TEST(L"-123" == convert<std::wstring> (ll_int).value());
94 int const imin = std::numeric_limits<int>::min();
95 int const imax = std::numeric_limits<int>::max();
96 long int const lmin = std::numeric_limits<long int>::min();
97 long int const lmax = std::numeric_limits<long int>::max();
98 long long int const llmin = std::numeric_limits<long long int>::min();
99 long long int const llmax = std::numeric_limits<long long int>::max();
101 std::string const imin_str = boost::lexical_cast<std::string>(imin);
102 std::string const imax_str = boost::lexical_cast<std::string>(imax);
103 std::string const lmin_str = boost::lexical_cast<std::string>(lmin);
104 std::string const lmax_str = boost::lexical_cast<std::string>(lmax);
105 std::string const llmin_str = boost::lexical_cast<std::string>(llmin);
106 std::string const llmax_str = boost::lexical_cast<std::string>(llmax);
108 BOOST_TEST( imin_str == convert<std::string>( imin).value());
109 BOOST_TEST( imax_str == convert<std::string>( imax).value());
110 BOOST_TEST( lmin_str == convert<std::string>( lmin).value());
111 BOOST_TEST( lmax_str == convert<std::string>( lmax).value());
112 BOOST_TEST(llmin_str == convert<std::string>(llmin).value());
113 BOOST_TEST(llmax_str == convert<std::string>(llmax).value());
120 unsigned short const us_int = 123;
121 unsigned int const ui_int = 123;
122 unsigned long const ul_int = 123;
123 unsigned long long const ull_int = 123;
125 BOOST_TEST( "123" == convert< std::string> ( us_int).value());
126 BOOST_TEST( "123" == convert< std::string> ( ui_int).value());
127 BOOST_TEST( "123" == convert< std::string> ( ul_int).value());
128 BOOST_TEST( "123" == convert< std::string> (ull_int).value());
130 BOOST_TEST(L"123" == convert<std::wstring> ( us_int).value());
131 BOOST_TEST(L"123" == convert<std::wstring> ( ui_int).value());
132 BOOST_TEST(L"123" == convert<std::wstring> ( ul_int).value());
133 BOOST_TEST(L"123" == convert<std::wstring> (ull_int).value());
135 unsigned int const uimax = (std::numeric_limits<unsigned int>::max)();
136 unsigned long int const ulmax = (std::numeric_limits<unsigned long int>::max)();
137 unsigned long long int const ullmax = (std::numeric_limits<unsigned long long int>::max)();
139 std::string const uimax_str = boost::lexical_cast<std::string>( uimax);
140 std::string const ulmax_str = boost::lexical_cast<std::string>( ulmax);
141 std::string const ullmax_str = boost::lexical_cast<std::string>(ullmax);
143 BOOST_TEST( uimax_str == convert<std::string>( uimax).value());
144 BOOST_TEST( ulmax_str == convert<std::string>( ulmax).value());
145 BOOST_TEST(ullmax_str == convert<std::string>(ullmax).value());
148 //[strtol_numeric_base_header
149 #include <boost/convert.hpp>
150 #include <boost/convert/strtol.hpp>
154 using boost::convert;
156 namespace cnv = boost::cnv;
157 namespace arg = boost::cnv::parameter;
164 boost::cnv::strtol cnv;
166 string s01 = convert<string>( 12, cnv(arg::width = 4)).value();
167 string s02 = convert<string>( 12, cnv(arg::width = 5)
168 (arg::fill = '*')).value();
169 string s03 = convert<string>( 12, cnv(arg::width = 5)
171 (arg::adjust = cnv::adjust::left)).value();
172 string s04 = convert<string>(-98, cnv(arg::width = 6)
174 (arg::adjust = cnv::adjust::right)).value();
176 string s05 = convert<string>(-12.3451, cnv(arg::precision = 2)
179 (arg::adjust = cnv::adjust::left)).value();
180 string s06 = convert<string>(-12.3450, cnv(arg::adjust = cnv::adjust::right)).value();
181 string s07 = convert<string>(-12.3450, cnv(arg::adjust = cnv::adjust::center)).value();
183 BOOST_TEST(s01 == " 12");
184 BOOST_TEST(s02 == "***12");
185 BOOST_TEST(s03 == "12xxx");
186 BOOST_TEST(s04 == "ZZZ-98");
187 BOOST_TEST(s05 == "-12.35****");
188 BOOST_TEST(s06 == "****-12.35");
189 BOOST_TEST(s07 == "**-12.35**");
197 //[strtol_numeric_base
198 boost::cnv::strtol cnv;
200 BOOST_TEST( "11111110" == convert< string>(254, cnv(arg::base = cnv::base::bin)).value());
201 BOOST_TEST( "254" == convert< string>(254, cnv(arg::base = cnv::base::dec)).value());
202 BOOST_TEST( "FE" == convert< string>(254, cnv(arg::base = cnv::base::hex)).value());
203 BOOST_TEST( "376" == convert< string>(254, cnv(arg::base = cnv::base::oct)).value());
205 //[wide_strtol_numeric_base
206 BOOST_TEST(L"11111110" == convert<wstring>(254, cnv(arg::base = cnv::base::bin)).value());
207 BOOST_TEST( L"254" == convert<wstring>(254, cnv(arg::base = cnv::base::dec)).value());
208 BOOST_TEST( L"FE" == convert<wstring>(254, cnv(arg::base = cnv::base::hex)).value());
209 BOOST_TEST( L"376" == convert<wstring>(254, cnv(arg::base = cnv::base::oct)).value());
218 boost::cnv::strtol cnv;
220 BOOST_TEST(-1 == convert<int>( " 12", cnv(arg::skipws = false)).value_or(-1));
221 BOOST_TEST(12 == convert<int>( " 12", cnv(arg::skipws = true)).value_or(-1));
223 //[wide_strtol_skipws
224 BOOST_TEST(-1 == convert<int>(L" 12", cnv(arg::skipws = false)).value_or(-1));
225 BOOST_TEST(12 == convert<int>(L" 12", cnv(arg::skipws = true)).value_or(-1));
234 boost::cnv::strtol cnv;
236 BOOST_TEST( "12.3" == convert<string>(12.3456, cnv(arg::precision = 1)).value());
237 BOOST_TEST( "12.35" == convert<string>(12.3456, cnv(arg::precision = 2)).value());
238 BOOST_TEST("12.346" == convert<string>(12.3456, cnv(arg::precision = 3)).value());
240 BOOST_TEST( "-12.3" == convert<string>(-12.3456, cnv(arg::precision = 1)).value());
241 BOOST_TEST( "-12.35" == convert<string>(-12.3456, cnv(arg::precision = 2)).value());
242 BOOST_TEST("-12.346" == convert<string>(-12.3456, cnv(arg::precision = 3)).value());
247 std::pair<double, int>
250 static boost::random::mt19937 gen (::time(0));
251 static boost::random::uniform_int_distribution<> precision (0, 6);
252 static boost::random::uniform_int_distribution<> int_part (0, SHRT_MAX);
253 static boost::random::uniform_01<double> fraction; // uniform double in [0,1)
256 double dbl = (int_part(gen) + fraction(gen)) * ((sign = !sign) ? 1 : -1);
258 // printf("%.12f\n", dbl);
260 return std::make_pair(dbl, precision(gen));
265 compare(std::pair<double, int> pair)
267 boost::cnv::strtol cnv1;
268 boost::cnv::printf cnv2;
270 string s1 = convert<string>(pair.first, cnv1(arg::precision = pair.second)).value();
271 string s2 = convert<string>(pair.first, cnv2(arg::precision = pair.second)).value();
274 printf("dbl=%.12f(%d).strtol/printf=%s/%s.\n", pair.first, pair.second, s1.c_str(), s2.c_str());
281 // double round_up_abs01 = ::rint(-0.5);
282 // double round_up_abs02 = ::round(-0.5);
283 // double round_up_abs11 = ::rint(0.5);
284 // double round_up_abs12 = ::round(0.5);
286 // double huge_v = 987654321098765432109.123;
288 // printf("%f\n", huge_v);
289 // string huge = convert<string>(huge_v, cnv1(arg::precision = 2)).value();
290 // printf("%s\n", huge.c_str());
292 int const num_tries = 1000000;
293 double const dbls[] = { 0.90, 1.0, 1.1, 0.94, 0.96, 1.04, 1.05, 1.06, 9.654, 999.888 };
294 int const num_dbls = sizeof(dbls) / sizeof(dbls[0]);
296 printf("cnv::strtol::%s: started with %d random numbers...\n", __FUNCTION__, num_tries);
298 BOOST_TEST( "0" == convert<string>( 0.0, cnv::strtol()(arg::precision = 0)).value());
299 BOOST_TEST( "0.0" == convert<string>( 0.0, cnv::strtol()(arg::precision = 1)).value());
300 BOOST_TEST("0.00" == convert<string>( 0.0, cnv::strtol()(arg::precision = 2)).value());
301 BOOST_TEST( "1" == convert<string>(0.95, cnv::strtol()(arg::precision = 0)).value());
302 BOOST_TEST( "1.0" == convert<string>(0.95, cnv::strtol()(arg::precision = 1)).value());
303 BOOST_TEST("0.95" == convert<string>(0.95, cnv::strtol()(arg::precision = 2)).value());
305 for (int k = 0; k < num_tries; ++k)
306 compare(get_random());
308 for (int k = 0; k < num_dbls; ++k)
309 for (int precision = 0; precision < 3; ++precision)
311 compare(std::make_pair( dbls[k], precision));
312 compare(std::make_pair(-dbls[k], precision));
315 printf("cnv::strtol::%s: finished.\n", __FUNCTION__);
322 //[strtol_user_string
323 boost::cnv::strtol cnv;
325 BOOST_TEST( "12" == convert<my_string>(12, cnv).value());
326 BOOST_TEST("0.95" == convert<my_string>(0.95, cnv(arg::precision = 2)).value());
335 boost::cnv::strtol cnv;
336 change up_chg = change::up;
337 change dn_chg = change::dn;
339 BOOST_TEST(convert<std::string>(up_chg, cnv, "bad") == "up");
340 BOOST_TEST(convert<std::string>(dn_chg, cnv, "bad") == "dn");
341 BOOST_TEST(convert<std::string>( 12, cnv, "bad") == "12");
343 BOOST_TEST(convert<change>("up", cnv, change::no) == change::up);
344 BOOST_TEST(convert<change>("dn", cnv, change::no) == change::dn);
345 BOOST_TEST(convert< int>("12", cnv, -1) == 12);
350 main(int, char const* [])
352 dbl_to_str_example();
365 return boost::report_errors();