56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
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// Copyright 1998-2002 John Maddock
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// Copyright 2017 Peter Dimov
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//
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// Distributed under the Boost Software License, Version 1.0.
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//
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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// See library home page at http://www.boost.org/libs/regex
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#include <boost/regex.hpp>
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#include <cassert>
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#include <string>
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bool validate_card_format(const std::string& s)
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{
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static const boost::regex e("(\\d{4}[- ]){3}\\d{4}");
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return boost::regex_match(s, e);
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}
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const boost::regex card_rx("\\A(\\d{3,4})[- ]?(\\d{4})[- ]?(\\d{4})[- ]?(\\d{4})\\z");
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const std::string machine_format("\\1\\2\\3\\4");
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const std::string human_format("\\1-\\2-\\3-\\4");
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std::string machine_readable_card_number(const std::string& s)
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{
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return boost::regex_replace(s, card_rx, machine_format, boost::match_default | boost::format_sed);
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}
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std::string human_readable_card_number(const std::string& s)
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{
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return boost::regex_replace(s, card_rx, human_format, boost::match_default | boost::format_sed);
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}
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int main()
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{
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std::string s[ 4 ] = { "0000111122223333", "0000 1111 2222 3333", "0000-1111-2222-3333", "000-1111-2222-3333" };
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assert(!validate_card_format(s[0]));
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assert(machine_readable_card_number(s[0]) == s[0]);
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assert(human_readable_card_number(s[0]) == s[2]);
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assert(validate_card_format(s[1]));
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assert(machine_readable_card_number(s[1]) == s[0]);
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assert(human_readable_card_number(s[1]) == s[2]);
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assert(validate_card_format(s[2]));
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assert(machine_readable_card_number(s[2]) == s[0]);
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assert(human_readable_card_number(s[2]) == s[2]);
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assert(!validate_card_format(s[3]));
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return 0;
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}
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