1// Boost.Convert test and usage example
2// Copyright (c) 2009-2020 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#include "./test.hpp"
7
8#if !defined(BOOST_CONVERT_CXX14)
9int main(int, char const* []) { return 0; }
10#else
11
12#include <boost/convert.hpp>
13#include <boost/convert/printf.hpp>
14#include <boost/convert/stream.hpp>
15#include <boost/random/mersenne_twister.hpp>
16#include <boost/random/uniform_int_distribution.hpp>
17#include <boost/random/uniform_01.hpp>
18#include <boost/lexical_cast.hpp>
19#include <boost/utility/string_view.hpp>
20
21//[strtol_basic_deployment_header
22#include <boost/convert.hpp>
23#include <boost/convert/strtol.hpp>
24
25using std::string;
26using std::wstring;
27using boost::convert;
28
29struct boost::cnv::by_default : boost::cnv::strtol {};
30//]
31
32static
33void
34test_str_to_uint()
35{
36 string const bad_str = "not an int";
37 string const neg_str = "-11";
38 string const std_str = "11";
39 char const* const c_str = "12";
40 boost::string_view v_str = boost::string_view(c_str, 1);
41 unsigned int const imax = (std::numeric_limits<unsigned int>::max)();
42 unsigned long int const lmax = (std::numeric_limits<unsigned long int>::max)();
43 std::string const imax_str = boost::lexical_cast<std::string>(imax);
44 std::string const lmax_str = boost::lexical_cast<std::string>(lmax);
45
46 BOOST_TEST( 0 == convert<unsigned int>(bad_str).value_or(0));
47 BOOST_TEST( 0 == convert<unsigned int>(neg_str).value_or(0));
48 BOOST_TEST( 0 == convert<unsigned long int>(neg_str).value_or(0));
49 BOOST_TEST( 0 == convert<unsigned long int>(neg_str).value_or(0));
50 BOOST_TEST(11 == convert<unsigned int>(std_str).value());
51 BOOST_TEST(12 == convert<unsigned int>( c_str).value());
52 BOOST_TEST( 1 == convert<unsigned int>( v_str).value_or(0));
53 BOOST_TEST(11 == convert<unsigned long int>(std_str).value());
54 BOOST_TEST(12 == convert<unsigned long int>( c_str).value());
55 BOOST_TEST(imax == convert< unsigned int>(imax_str).value());
56 BOOST_TEST(lmax == convert<unsigned long int>(lmax_str).value());
57}
58
59static
60void
61test_str_to_int()
62{
63 //[strtol_basic_deployment
64 string const bad_str = "not an int";
65 string const std_str = "-11";
66 char const* const c_str = "-12";
67 boost::string_view v_str = boost::string_view(c_str, 2);
68
69 BOOST_TEST( -1 == convert<int>(bad_str).value_or(-1));
70 BOOST_TEST(-11 == convert<int>(std_str).value());
71 BOOST_TEST(-12 == convert<int>( c_str).value());
72 BOOST_TEST( -1 == convert<int>( v_str).value_or(0));
73 //]
74 wstring const bad_wstr = L"not an int";
75 wstring const wstd_str = L"-11";
76 wchar_t const* const wc_str = L"-12";
77
78 BOOST_TEST( -1 == convert<int>(bad_wstr).value_or(-1));
79 BOOST_TEST(-11 == convert<int>(wstd_str).value());
80 BOOST_TEST(-12 == convert<int>( wc_str).value());
81}
82
83static
84void
85test_int_to_str()
86{
87 short const s_int = -123;
88 int const i_int = -123;
89 long const l_int = -123;
90 long long const ll_int = -123;
91
92 BOOST_TEST( "-123" == convert< std::string> ( s_int).value());
93 BOOST_TEST( "-123" == convert< std::string> ( i_int).value());
94 BOOST_TEST( "-123" == convert< std::string> ( l_int).value());
95 BOOST_TEST( "-123" == convert< std::string> (ll_int).value());
96
97 BOOST_TEST(L"-123" == convert<std::wstring> ( s_int).value());
98 BOOST_TEST(L"-123" == convert<std::wstring> ( i_int).value());
99 BOOST_TEST(L"-123" == convert<std::wstring> ( l_int).value());
100 BOOST_TEST(L"-123" == convert<std::wstring> (ll_int).value());
101
102 int const imin = (std::numeric_limits<int>::min)();
103 int const imax = (std::numeric_limits<int>::max)();
104 long int const lmin = (std::numeric_limits<long int>::min)();
105 long int const lmax = (std::numeric_limits<long int>::max)();
106 long long int const llmin = (std::numeric_limits<long long int>::min)();
107 long long int const llmax = (std::numeric_limits<long long int>::max)();
108
109 std::string const imin_str = boost::lexical_cast<std::string>(imin);
110 std::string const imax_str = boost::lexical_cast<std::string>(imax);
111 std::string const lmin_str = boost::lexical_cast<std::string>(lmin);
112 std::string const lmax_str = boost::lexical_cast<std::string>(lmax);
113 std::string const llmin_str = boost::lexical_cast<std::string>(llmin);
114 std::string const llmax_str = boost::lexical_cast<std::string>(llmax);
115
116 BOOST_TEST( imin_str == convert<std::string>( imin).value());
117 BOOST_TEST( imax_str == convert<std::string>( imax).value());
118 BOOST_TEST( lmin_str == convert<std::string>( lmin).value());
119 BOOST_TEST( lmax_str == convert<std::string>( lmax).value());
120 BOOST_TEST(llmin_str == convert<std::string>(llmin).value());
121 BOOST_TEST(llmax_str == convert<std::string>(llmax).value());
122}
123
124static
125void
126test_uint_to_str()
127{
128 unsigned short const us_int = 123;
129 unsigned int const ui_int = 123;
130 unsigned long const ul_int = 123;
131 unsigned long long const ull_int = 123;
132
133 BOOST_TEST( "123" == convert< std::string> ( us_int).value());
134 BOOST_TEST( "123" == convert< std::string> ( ui_int).value());
135 BOOST_TEST( "123" == convert< std::string> ( ul_int).value());
136 BOOST_TEST( "123" == convert< std::string> (ull_int).value());
137
138 BOOST_TEST(L"123" == convert<std::wstring> ( us_int).value());
139 BOOST_TEST(L"123" == convert<std::wstring> ( ui_int).value());
140 BOOST_TEST(L"123" == convert<std::wstring> ( ul_int).value());
141 BOOST_TEST(L"123" == convert<std::wstring> (ull_int).value());
142
143 unsigned int const uimax = (std::numeric_limits<unsigned int>::max)();
144 unsigned long int const ulmax = (std::numeric_limits<unsigned long int>::max)();
145 unsigned long long int const ullmax = (std::numeric_limits<unsigned long long int>::max)();
146
147 std::string const uimax_str = boost::lexical_cast<std::string>( uimax);
148 std::string const ulmax_str = boost::lexical_cast<std::string>( ulmax);
149 std::string const ullmax_str = boost::lexical_cast<std::string>(ullmax);
150
151 BOOST_TEST( uimax_str == convert<std::string>( uimax).value());
152 BOOST_TEST( ulmax_str == convert<std::string>( ulmax).value());
153 BOOST_TEST(ullmax_str == convert<std::string>(ullmax).value());
154}
155
156//[strtol_numeric_base_header
157#include <boost/convert.hpp>
158#include <boost/convert/strtol.hpp>
159
160using std::string;
161using std::wstring;
162using boost::convert;
163
164namespace cnv = boost::cnv;
165namespace arg = boost::cnv::parameter;
166//]
167static
168void
169test_width()
170{
171 //[strtol_width
172 boost::cnv::strtol cnv;
173
174 string s01 = convert<string>( 12, cnv(arg::width = 4)).value();
175 string s02 = convert<string>( 12, cnv(arg::width = 5)
176 (arg::fill = '*')).value();
177 string s03 = convert<string>( 12, cnv(arg::width = 5)
178 (arg::fill = 'x')
179 (arg::adjust = cnv::adjust::left)).value();
180 string s04 = convert<string>(-98, cnv(arg::width = 6)
181 (arg::fill = 'Z')
182 (arg::adjust = cnv::adjust::right)).value();
183
184 string s05 = convert<string>(-12.3451, cnv(arg::precision = 2)
185 (arg::width = 10)
186 (arg::fill = '*')
187 (arg::adjust = cnv::adjust::left)).value();
188 string s06 = convert<string>(-12.3450, cnv(arg::adjust = cnv::adjust::right)).value();
189 string s07 = convert<string>(-12.3450, cnv(arg::adjust = cnv::adjust::center)).value();
190
191 BOOST_TEST(s01 == " 12");
192 BOOST_TEST(s02 == "***12");
193 BOOST_TEST(s03 == "12xxx");
194 BOOST_TEST(s04 == "ZZZ-98");
195 BOOST_TEST(s05 == "-12.35****");
196 BOOST_TEST(s06 == "****-12.35");
197 BOOST_TEST(s07 == "**-12.35**");
198 //]
199}
200
201static
202void
203test_base()
204{
205 //[strtol_numeric_base
206 boost::cnv::strtol cnv;
207
208 BOOST_TEST( "11111110" == convert< string>(254, cnv(arg::base = cnv::base::bin)).value());
209 BOOST_TEST( "254" == convert< string>(254, cnv(arg::base = cnv::base::dec)).value());
210 BOOST_TEST( "FE" == convert< string>(254, cnv(arg::base = cnv::base::hex)).value());
211 BOOST_TEST( "376" == convert< string>(254, cnv(arg::base = cnv::base::oct)).value());
212 //]
213 //[wide_strtol_numeric_base
214 BOOST_TEST(L"11111110" == convert<wstring>(254, cnv(arg::base = cnv::base::bin)).value());
215 BOOST_TEST( L"254" == convert<wstring>(254, cnv(arg::base = cnv::base::dec)).value());
216 BOOST_TEST( L"FE" == convert<wstring>(254, cnv(arg::base = cnv::base::hex)).value());
217 BOOST_TEST( L"376" == convert<wstring>(254, cnv(arg::base = cnv::base::oct)).value());
218 //]
219}
220
221static
222void
223test_upper()
224{
225// boost::cnv::strtol cnv;
226// char const* c_lcase = "abcde";
227// char const* c_ucase = "ABCDE";
228// wchar_t const* w_lcase = L"abcde";
229// wchar_t const* w_ucase = L"ABCDE";
230//
231// BOOST_TEST(c_lcase == convert< string>(c_lcase, cnv(arg::uppercase = false)).value_or(""));
232// BOOST_TEST(c_ucase == convert< string>(c_lcase, cnv(arg::uppercase = true)).value_or(""));
233// BOOST_TEST(w_ucase == convert<wstring>(w_lcase, cnv(arg::uppercase = false)).value_or(""));
234// BOOST_TEST(w_ucase == convert<wstring>(w_lcase, cnv(arg::uppercase = true)).value_or(""));
235}
236
237static
238void
239test_skipws()
240{
241 //[strtol_skipws
242 boost::cnv::strtol cnv;
243
244 BOOST_TEST(-1 == convert<int>( " 12", cnv(arg::skipws = false)).value_or(-1));
245 BOOST_TEST(12 == convert<int>( " 12", cnv(arg::skipws = true)).value_or(-1));
246 //]
247 //[wide_strtol_skipws
248 BOOST_TEST(-1 == convert<int>(L" 12", cnv(arg::skipws = false)).value_or(-1));
249 BOOST_TEST(12 == convert<int>(L" 12", cnv(arg::skipws = true)).value_or(-1));
250 //]
251}
252
253static
254void
255dbl_to_str_example()
256{
257 //[strtol_precision
258 boost::cnv::strtol cnv;
259
260 BOOST_TEST( "12.3" == convert<string>(12.3456, cnv(arg::precision = 1)).value());
261 BOOST_TEST( "12.35" == convert<string>(12.3456, cnv(arg::precision = 2)).value());
262 BOOST_TEST("12.346" == convert<string>(12.3456, cnv(arg::precision = 3)).value());
263
264 BOOST_TEST( "-12.3" == convert<string>(-12.3456, cnv(arg::precision = 1)).value());
265 BOOST_TEST( "-12.35" == convert<string>(-12.3456, cnv(arg::precision = 2)).value());
266 BOOST_TEST("-12.346" == convert<string>(-12.3456, cnv(arg::precision = 3)).value());
267 //]
268}
269
270static
271std::pair<double, int>
272get_random()
273{
274 namespace rdm = boost::random;
275
276 static rdm::mt19937 gen (::time(0));
277 static rdm::uniform_int_distribution<> precision (0, 6);
278 static rdm::uniform_int_distribution<> int_part (0, SHRT_MAX);
279 static rdm::uniform_01<double> fraction; // uniform double in [0,1)
280 static bool sign;
281
282 double dbl = (int_part(gen) + fraction(gen)) * ((sign = !sign) ? 1 : -1);
283
284// printf("%.12f\n", dbl);
285
286 return std::make_pair(dbl, precision(gen));
287}
288
289static
290void
291compare(std::pair<double, int> pair)
292{
293 boost::cnv::strtol cnv1;
294 boost::cnv::printf cnv2;
295
296 string s1 = convert<string>(pair.first, cnv1(arg::precision = pair.second)).value();
297 string s2 = convert<string>(pair.first, cnv2(arg::precision = pair.second)).value();
298
299 if (s1 != s2)
300 printf("dbl=%.12f(%d).strtol/printf=%s/%s.\n", pair.first, pair.second, s1.c_str(), s2.c_str());
301}
302
303static
304void
305test_str_to_dbl()
306{
307 char const* const c_str = "1.23456";
308
309 BOOST_TEST(1.2 == convert<double>(boost::string_view(c_str, 3)).value_or(0));
310 BOOST_TEST(1.23 == convert<double>(boost::string_view(c_str, 4)).value_or(0));
311}
312
313static
314void
315test_dbl_to_str()
316{
317// double round_up_abs01 = ::rint(-0.5);
318// double round_up_abs02 = ::round(-0.5);
319// double round_up_abs11 = ::rint(0.5);
320// double round_up_abs12 = ::round(0.5);
321
322// double huge_v = 987654321098765432109.123;
323//
324// printf("%f\n", huge_v);
325// string huge = convert<string>(huge_v, cnv1(arg::precision = 2)).value();
326// printf("%s\n", huge.c_str());
327
328 int const num_tries = 1000000;
329 double const dbls[] = { 0.90, 1.0, 1.1, 0.94, 0.96, 1.04, 1.05, 1.06, 9.654, 999.888 };
330 int const num_dbls = sizeof(dbls) / sizeof(dbls[0]);
331
332 printf("cnv::strtol::%s: started with %d random numbers...\n", __FUNCTION__, num_tries);
333
334 BOOST_TEST( "0" == convert<string>( 0.0, cnv::strtol()(arg::precision = 0)).value());
335 BOOST_TEST( "0.0" == convert<string>( 0.0, cnv::strtol()(arg::precision = 1)).value());
336 BOOST_TEST("0.00" == convert<string>( 0.0, cnv::strtol()(arg::precision = 2)).value());
337 BOOST_TEST( "1" == convert<string>(0.95, cnv::strtol()(arg::precision = 0)).value());
338 BOOST_TEST( "1.0" == convert<string>(0.95, cnv::strtol()(arg::precision = 1)).value());
339 BOOST_TEST("0.95" == convert<string>(0.95, cnv::strtol()(arg::precision = 2)).value());
340
341 for (int k = 0; k < num_tries; ++k)
342 compare(get_random());
343
344 for (int k = 0; k < num_dbls; ++k)
345 for (int precision = 0; precision < 3; ++precision)
346 {
347 compare(std::make_pair( dbls[k], precision));
348 compare(std::make_pair(-dbls[k], precision));
349 }
350
351 printf("cnv::strtol::%s: finished.\n", __FUNCTION__);
352}
353
354static
355void
356test_user_string()
357{
358 //[strtol_user_string
359 boost::cnv::strtol cnv;
360
361 BOOST_TEST( "12" == convert<my_string>(12, cnv).value());
362 BOOST_TEST("0.95" == convert<my_string>(0.95, cnv(arg::precision = 2)).value());
363 //]
364}
365
366static
367void
368test_user_type()
369{
370 //[strtol_user_type
371 boost::cnv::strtol cnv;
372 change up_chg = change::up;
373 change dn_chg = change::dn;
374
375 BOOST_TEST(convert<std::string>(up_chg, cnv, "bad") == "up");
376 BOOST_TEST(convert<std::string>(dn_chg, cnv, "bad") == "dn");
377 BOOST_TEST(convert<std::string>( 12, cnv, "bad") == "12");
378
379 BOOST_TEST(convert<change>("up", cnv, change::no) == change::up);
380 BOOST_TEST(convert<change>("dn", cnv, change::no) == change::dn);
381 BOOST_TEST(convert< int>("12", cnv, -1) == 12);
382 //]
383}
384
385int
386main(int, char const* [])
387{
388 dbl_to_str_example();
389
390 test_str_to_int();
391 test_str_to_uint();
392 test_int_to_str();
393 test_uint_to_str();
394 test_base();
395 test_upper();
396 test_skipws();
397 test_str_to_dbl();
398 test_dbl_to_str();
399 test_width();
400 test_user_string();
401 test_user_type();
402
403 return boost::report_errors();
404}
405
406#endif
407

source code of boost/libs/convert/test/strtol_converter.cpp