1
2 // Copyright 1998-2002 John Maddock
3 // Copyright 2017 Peter Dimov
4 //
5 // Distributed under the Boost Software License, Version 1.0.
6 //
7 // See accompanying file LICENSE_1_0.txt or copy at
8 // http://www.boost.org/LICENSE_1_0.txt
9
10 // See library home page at http://www.boost.org/libs/regex
11
12 #include <boost/regex.hpp>
13 #include <boost/core/lightweight_test.hpp>
14 #include <string>
15
validate_card_format(const std::string & s)16 bool validate_card_format(const std::string& s)
17 {
18 static const boost::regex e("(\\d{4}[- ]){3}\\d{4}");
19 return boost::regex_match(s, e);
20 }
21
22 const boost::regex card_rx("\\A(\\d{3,4})[- ]?(\\d{4})[- ]?(\\d{4})[- ]?(\\d{4})\\z");
23 const std::string machine_format("\\1\\2\\3\\4");
24 const std::string human_format("\\1-\\2-\\3-\\4");
25
machine_readable_card_number(const std::string & s)26 std::string machine_readable_card_number(const std::string& s)
27 {
28 return boost::regex_replace(s, card_rx, machine_format, boost::match_default | boost::format_sed);
29 }
30
human_readable_card_number(const std::string & s)31 std::string human_readable_card_number(const std::string& s)
32 {
33 return boost::regex_replace(s, card_rx, human_format, boost::match_default | boost::format_sed);
34 }
35
main()36 int main()
37 {
38 std::string s[ 4 ] = { "0000111122223333", "0000 1111 2222 3333", "0000-1111-2222-3333", "000-1111-2222-3333" };
39
40 BOOST_TEST( !validate_card_format( s[0] ) );
41 BOOST_TEST_EQ( machine_readable_card_number( s[0] ), s[0] );
42 BOOST_TEST_EQ( human_readable_card_number( s[0] ), s[2] );
43
44 BOOST_TEST( validate_card_format( s[1] ) );
45 BOOST_TEST_EQ( machine_readable_card_number( s[1] ), s[0] );
46 BOOST_TEST_EQ( human_readable_card_number( s[1] ), s[2] );
47
48 BOOST_TEST( validate_card_format( s[2] ) );
49 BOOST_TEST_EQ( machine_readable_card_number( s[2] ), s[0] );
50 BOOST_TEST_EQ( human_readable_card_number( s[2] ), s[2] );
51
52 BOOST_TEST( !validate_card_format( s[3] ) );
53
54 return boost::report_errors();
55 }
56